November 2020 North American storm complex: Difference between revisions
Undid revision 1014709059 by MarioProtIV (talk) per WP:TWC, current consensus is to include. if you would like to exclude, then build up a consensus for doing so first |
Citation bot (talk | contribs) Removed parameters. | Use this bot. Report bugs. | Suggested by Abductive | Category:Articles to be expanded from August 2024 | #UCB_Category 37/795 |
||
(36 intermediate revisions by 16 users not shown) | |||
Line 1: | Line 1: | ||
{{merge|2020–21 North American winter|discussion=Talk:2020-21 North American winter|date=June 2024}} |
|||
{{Infobox |
{{Infobox weather event |
||
| name = Late November 2020 North American storm complex |
|||
| |
| name = November 2020 North American storm complex |
||
| image |
| image = Late November-Early December winter storm 2020-11-30 1631z.jpg |
||
| caption = [[GOES-16]] satellite imagery of the [[storm complex]] impacting the [[Ohio Valley]] at 16:31 [[Coordinated Universal Time|UTC]] (11:31 a.m. [[Eastern Standard Time|EDT]]) on November 30 |
|||
| stormtype = [[Extratropical cyclone]]<br />[[Winter storm]]<br />[[Tornado outbreak]] |
|||
| formed = November 29, 2020 |
| formed = November 29, 2020 |
||
| dissipated = December 2, 2020 |
| dissipated = December 2, 2020 |
||
}}{{Infobox weather event/Winter storm |
|||
| RSI = |
|||
| maximum snow = |
| maximum snow = {{convert|24|in|cm|abbr=on}} at [[Thompson, Ohio]] |
||
| gusts = 61 |
| gusts = 61 |
||
| |
| pressure = 993 |
||
}}{{Infobox weather event/Tornado outbreak |
|||
⚫ | |||
⚫ | |||
| fujita-scale = EF1 |
|||
⚫ | |||
}}{{Infobox weather event/Effects |
|||
⚫ | |||
| fatalities = None confirmed |
| fatalities = None confirmed |
||
⚫ | | damages = >$100 million (2020 [[United States dollar|USD]])<ref name="Aon Benfield">{{cite web|title=Global Catastrophe Recap – November 2020|url=http://thoughtleadership.aon.com/documents/20201210_analytics-if-november-global-recap.pdf|work=[[Aon (company)|Aon Benfield]]|date=December 10, 2020|access-date=March 6, 2021|pages=4}}</ref> |
||
⚫ | |||
⚫ | | damages = > |
||
| fujitascale = EF1 |
|||
⚫ | |||
| affected = [[Southern United States]], [[Ohio Valley]], [[Northeastern United States]], [[Eastern Canada]] |
| affected = [[Southern United States]], [[Ohio Valley]], [[Northeastern United States]], [[Eastern Canada]] |
||
⚫ | |||
⚫ | |||
{{Infobox weather event/Footer |
|||
⚫ | |||
| season = [[2020–21 North American winter]] {{nobold |
|||
⚫ | |||
⚫ | The ''' |
||
}} |
|||
⚫ | The '''November 2020 North American storm complex''' was a major early-season snowstorm that impacted most of the [[Ohio Valley]] from November 30–December 2 with heavy snow, gusty winds, and near-whiteout conditions. The system originated from a weak [[gulf low]] off the coast of [[Texas]] on November 29, which began to move northeastward onto land the next day. It then began to strengthen, as well as slowing its movement down, resulting in heavy, wind-driven snow for prolonged periods of time in the Ohio Valley. It also triggered a major lake-effect snow event from December 1–2 as the system stalled over [[Lake Ontario]], resulting in additional heavy snowfall. The storm system was also responsible for a severe thunderstorm outbreak in the [[Southeastern United States|Southeast]] and [[Mid-Atlantic (United States)|Mid-Atlantic]] regions, causing 22 severe thunderstorms and 5 tornadoes. In total, the system is estimated to have caused at least $100 million (2020 USD) in damages.<ref name="Aon Benfield"/> It was unofficially named ''Winter Storm Dane'' by [[The Weather Channel]].<ref name="weather.com">{{cite web |url=https://weather.com/forecast/regional/news/2020-11-30-winter-storm-forecast-great-lakes-ohio-valley-appalachians |title=Winter Storm Brought Wind-Driven Snow to Eastern Great Lakes, Appalachians |date=December 2, 2020 |website=weather.com}}</ref> |
||
==Meteorological history== |
==Meteorological history== |
||
The system formed as a weak [[low-pressure area (meteorology)|low-pressure system]] off the coast of southeastern [[Texas]] early on November 29. After meandering eastward for around 12 hours, the low-pressure made landfall and came ashore in southeastern [[Louisiana]] at 18:00 [[Coordinated Universal Time|UTC]].<ref>https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=11/29/2020&selmap=2020112918&maptype=satsfcnps</ref> It then turned northeastward, beginning to strengthen and spawning a secondary low-pressure to the east.<ref>https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=11/30/2020&selmap=2020113006&maptype=satsfcnps</ref> By 15:00 UTC on November 30, the system had spawned two more low-pressures, and the main low had reached an initial intensity of {{convert| |
The system formed as a weak [[low-pressure area (meteorology)|low-pressure system]] off the coast of southeastern [[Texas]] early on November 29. After meandering eastward for around 12 hours, the low-pressure made landfall and came ashore in southeastern [[Louisiana]] at 18:00 [[Coordinated Universal Time|UTC]].<ref>{{cite web | url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=11/29/2020&selmap=2020112918&maptype=satsfcnps | title=WPC Surface Analysis Archive }}</ref> It then turned northeastward, beginning to strengthen and spawning a secondary low-pressure to the east.<ref>{{cite web | url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=11/30/2020&selmap=2020113006&maptype=satsfcnps | title=WPC Surface Analysis Archive }}</ref> By 15:00 UTC on November 30, the system had spawned two more low-pressures, and the main low had reached an initial intensity of {{convert|995|mb|inHg}}.<ref>{{Cite web|url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=11/30/2020&selmap=2020113015&maptype=satsfcnps|title = WPC Surface Analysis Archive}}</ref> The system reached a peak intensity of {{convert|993|mb|inHg}} at 00:00 UTC on December 1, while two of the low-pressure areas dissipated and the main low stalled out over [[Lake Ontario]].<ref>{{Cite web|url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=12/01/2020&selmap=2020120100&maptype=satsfcnps|title = WPC Surface Analysis Archive}}</ref> Another low-pressure dissipated a few hours later, leaving only the main low remaining, which began to slowly weaken.<ref>{{Cite web|url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=12/01/2020&selmap=2020120106&maptype=satsfcnps|title = WPC Surface Analysis Archive}}</ref> The system continued weakening throughout December 1, and by early on December 2, it had begun moving to the northeast again.<ref>{{Cite web|url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=12/02/2020&selmap=2020120203&maptype=satsfcnps|title = WPC Surface Analysis Archive}}</ref> After continuing to weaken for several hours, it dissipated late on December 2.<ref>{{Cite web|url=https://www.wpc.ncep.noaa.gov/archives/web_pages/sfc/sfc_archive_maps.php?arcdate=12/02/2020&selmap=2020120221&maptype=satsfcnps|title = WPC Surface Analysis Archive}}</ref> |
||
==Preparations and impact== |
==Preparations and impact== |
||
Line 33: | Line 37: | ||
===Southern Appalachians=== |
===Southern Appalachians=== |
||
In [[Arab, Alabama]], {{convert|1|in|cm}} of snow was measured. Around {{convert|0.5|in|cm}} of snow was reported in the [[Murfreesboro, Tennessee]] area. The [[Gatlinburg]] and [[Pigeon Forge]] areas had seen up to {{convert|5|in|cm}}. By the end of the night, Mount Le Conte, Tennessee had seen {{convert|11|in|cm}} inches of snow, as reported by the [[National Weather Service]].<ref name="WVLT">{{Cite web|url=https://www.wvlt.tv/2020/12/05/more-snow-at-leconte-lodge-creates-magical-winter-scene/|title=More snow at LeConte Lodge creates magical winter scene|first=Megan|last=Sadler|website=WVLT}}</ref> Roan Mountain, Tennessee had seen {{convert|12|in|cm}} by the time snow and finished, and [[Robbinsville, North Carolina]] picked up a total of {{convert|15|in|cm}} from the system.<ref name="weather.com"/> |
In [[Arab, Alabama]], {{convert|1|in|cm}} of snow was measured. Around {{convert|0.5|in|cm}} of snow was reported in the [[Murfreesboro, Tennessee]] area. The [[Gatlinburg]] and [[Pigeon Forge]] areas had seen up to {{convert|5|in|cm}}. By the end of the night, Mount Le Conte, Tennessee had seen {{convert|11|in|cm}} inches of snow, as reported by the [[National Weather Service]].<ref name="WVLT">{{Cite web|url=https://www.wvlt.tv/2020/12/05/more-snow-at-leconte-lodge-creates-magical-winter-scene/|title=More snow at LeConte Lodge creates magical winter scene|first=Megan|last=Sadler|website=WVLT|date=5 December 2020 }}</ref> Roan Mountain, Tennessee had seen {{convert|12|in|cm}} by the time snow and finished, and [[Robbinsville, North Carolina]] picked up a total of {{convert|15|in|cm}} from the system.<ref name="weather.com"/> |
||
=== Northeast === |
|||
{{expand section|date=August 2024}} |
|||
On November 30, the [[Verrazano Narrows Bridge]] closed all lanes due to high wind conditions.<ref>[https://bronx.news12.com/upper-level-of-verrazzano-narrows-bridge-closed-due-to-high-wind-conditions High wind conditions lead to closures on Verrazzano-Narrows Bridge], News 12 The Bronx, December 1, 2020</ref> The bridge shaking resulted in viral social media videos.<ref>[https://www.timeout.com/newyork/news/watch-a-harrowing-video-of-the-verrazzano-bridge-rocking-and-groaning-in-mondays-high-winds-120220 Watch a harrowing video of the Verrazzano Bridge rocking and groaning in Monday's high winds], Timeout, December 2, 2020</ref> |
|||
== |
==Severe weather== |
||
{{See also|List of United States tornadoes from October to December 2020#November 30 event}} |
{{See also|List of United States tornadoes from October to December 2020#November 30 event}} |
||
The warm side of the system also resulted in some severe thunderstorms in the [[Southeastern United States|Southeast]] and [[Mid-Atlantic (United States)|Mid-Atlantic]] regions. Several of the storms became tornadic, with at least five tornadoes being confirmed on November 30. The storms also resulted in 22 reports of wind damage in an area from [[Maryland]] to eastern [[Pennsylvania]].<ref>{{cite web |title=Storm Prediction Center 20201129's Storm Reports |url=https://www.spc.noaa.gov/climo/reports/201129_rpts.html |website=www.spc.noaa.gov |access-date=3 December 2020}}</ref><ref>{{cite web |title=Storm Prediction Center 20201130's Storm Reports |url=https://www.spc.noaa.gov/climo/reports/201130_rpts.html |website=www.spc.noaa.gov |access-date=3 December 2020}}</ref> |
The warm side of the system also resulted in some severe thunderstorms in the [[Southeastern United States|Southeast]] and [[Mid-Atlantic (United States)|Mid-Atlantic]] regions. Several of the storms became tornadic, with at least five tornadoes being confirmed on November 30. The storms also resulted in 22 reports of wind damage in an area from [[Maryland]] to eastern [[Pennsylvania]].<ref>{{cite web |title=Storm Prediction Center 20201129's Storm Reports |url=https://www.spc.noaa.gov/climo/reports/201129_rpts.html |website=www.spc.noaa.gov |access-date=3 December 2020}}</ref><ref>{{cite web |title=Storm Prediction Center 20201130's Storm Reports |url=https://www.spc.noaa.gov/climo/reports/201130_rpts.html |website=www.spc.noaa.gov |access-date=3 December 2020}}</ref> |
||
⚫ | |||
===Confirmed tornadoes=== |
|||
⚫ | |||
{| class="wikitable sortable" style="width:100%;" |
{| class="wikitable sortable" style="width:100%;" |
||
|+ List of confirmed tornadoes – Monday, November 30, 2020{{efn|All dates are based on the local [[time zone]] where the tornado touched down; however, all times are in [[Coordinated Universal Time]] for consistency.|group=note|name=Date/Time}} |
|+ List of confirmed tornadoes – Monday, November 30, 2020{{efn|All dates are based on the local [[time zone]] where the tornado touched down; however, all times are in [[Coordinated Universal Time]] for consistency.|group=note|name=Date/Time}} |
||
Line 57: | Line 65: | ||
|[[Florida|FL]] |
|[[Florida|FL]] |
||
|{{Coord|30.5923|-83.5222|name=Hamburg (Nov. 30, EF1)}} |
|{{Coord|30.5923|-83.5222|name=Hamburg (Nov. 30, EF1)}} |
||
|08: |
|08:10–08:18 |
||
|{{convert|5. |
|{{convert|5.52|mi|km|abbr=on|sortable=on}} |
||
|{{convert|475|yd|m|abbr=on|sortable=on}} |
|{{convert|475|yd|m|abbr=on|sortable=on}} |
||
|Significant tree damage and minor damage to a home occurred near where this tornado touched down. The tornado was at its strongest and its widest point as it continued to significantly damage trees, and cause damage to multiple farm outbuildings. As the tornado narrowed, it snapped many pine trees. The tornado lifted near [[Florida State Road 53|SR 53]], just south of the [[Florida]]/[[Georgia (U.S. state)|Georgia]] state border.<ref>{{cite report| |
|Significant tree damage and minor damage to a home occurred near where this tornado touched down. The tornado was at its strongest and its widest point as it continued to significantly damage trees, and cause damage to multiple farm outbuildings. As the tornado narrowed, it snapped many pine trees. The tornado lifted near [[Florida State Road 53|SR 53]], just south of the [[Florida]]/[[Georgia (U.S. state)|Georgia]] state border.<ref>{{cite report|via=National Weather Service in Tallahassee, Florida|title=Florida Event Report: EF1 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=927424|publisher=National Centers for Environmental Information|year=2020|accessdate=January 1, 2023}}</ref> |
||
|- |
|- |
||
|bgcolor="{{storm colour|unk}}" | EFU |
|bgcolor="{{storm colour|unk}}" | EFU |
||
Line 67: | Line 75: | ||
|[[Florida|FL]] |
|[[Florida|FL]] |
||
|{{Coord|28.1|-82.69|name=East Lake (Nov. 30, EFU)}} |
|{{Coord|28.1|-82.69|name=East Lake (Nov. 30, EFU)}} |
||
|11: |
|11:00–11:25 |
||
|{{convert|12.45|mi|km|abbr=on|sortable=on}} |
|{{convert|12.45|mi|km|abbr=on|sortable=on}} |
||
|{{convert|50|yd|m|abbr=on|sortable=on}} |
|{{convert|50|yd|m|abbr=on|sortable=on}} |
||
|Despite this tornado touching down intermittently for over {{convert|12|mi|km|abbr=on|sortable=on}}, only damage reported was downed tree limbs and blown around patio furniture.<ref>{{cite report |
|Despite this tornado touching down intermittently for over {{convert|12|mi|km|abbr=on|sortable=on}}, only damage reported was downed tree limbs and blown around patio furniture.<ref>{{cite report|title=Storm Events Database November 30, 2020|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=926782|publisher=National Centers for Environmental Information|access-date=February 24, 2021}}</ref><ref>{{cite report|via=National Weather Service in Tampa, Florida|title=Florida Event Report: EFU Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=995031|publisher=National Centers for Environmental Information|year=2020|accessdate=January 1, 2023}}</ref> |
||
|- |
|- |
||
|bgcolor="{{storm colour|cat1}}" | EF1 |
|bgcolor="{{storm colour|cat1}}" | EF1 |
||
Line 77: | Line 85: | ||
|[[Maryland|MD]] |
|[[Maryland|MD]] |
||
|{{Coord|39.644|-76.063|name=Port Deposit (Nov. 30, EF1)}} |
|{{Coord|39.644|-76.063|name=Port Deposit (Nov. 30, EF1)}} |
||
|19: |
|19:37–19:42 |
||
|{{convert|3. |
|{{convert|3.36|mi|km|abbr=on|sortable=on}} |
||
|{{convert|75|yd|m|abbr=on|sortable=on}} |
|{{convert|75|yd|m|abbr=on|sortable=on}} |
||
|Many trees were snapped or uprooted at the beginning of the path, including some near a home. As the tornado moved northeast, it damaged newly installed power poles near another home. Additional trees and power poles were damaged. The tornado was at its strongest point when a front porch awning was lifted. Damage to other homes occurred, including damage to roof shingles and siding. One home's garage door was bent inward. Trees were snapped or uprooted along the rest of the path before the tornado lifted.<ref>{{cite report| |
|Many trees were snapped or uprooted at the beginning of the path, including some near a home. As the tornado moved northeast, it damaged newly installed power poles near another home. Additional trees and power poles were damaged. The tornado was at its strongest point when a front porch awning was lifted. Damage to other homes occurred, including damage to roof shingles and siding. One home's garage door was bent inward. Trees were snapped or uprooted along the rest of the path before the tornado lifted.<ref>{{cite report|via=National Weather Service in Baltimore, Maryland|title=Maryland Event Report: EF1 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=938477|publisher=National Centers for Environmental Information|year=2020|accessdate=January 1, 2023}}</ref> |
||
|- |
|- |
||
|bgcolor="{{storm colour|storm}}" | EF0 |
|bgcolor="{{storm colour|storm}}" | EF0 |
||
Line 87: | Line 95: | ||
|[[Maryland|MD]] |
|[[Maryland|MD]] |
||
|{{Coord|39.0675|-75.8520|name=Baltimore Corner (Nov. 30, EF0)}} |
|{{Coord|39.0675|-75.8520|name=Baltimore Corner (Nov. 30, EF0)}} |
||
|20: |
|20:13–20:20 |
||
|{{convert|5. |
|{{convert|5.32|mi|km|abbr=on|sortable=on}} |
||
|{{convert|75|yd|m|abbr=on|sortable=on}} |
|{{convert|75|yd|m|abbr=on|sortable=on}} |
||
|This tornado first touched down along [[Maryland State Route 313|MD 313]], just south of the [[Caroline County, Maryland|Caroline]]/[[Queen Anne's County, Maryland|Queen Anne's]] county border. Little to no damage was found in this area, however, a small [[tornado debris signature]] appeared on doppler radar. As this tornado moved northeastward, it passed northwest of [[Henderson, Maryland|Henderson]]. In this area, a small horse barn was destroyed, with its walls collapsed, and its roof blown across a yard into a nearby home. The nearby home had damage done to its roof, siding, and chimney. Several trees and tree branches were snapped or uprooted. Later on down the path, two barns were destroyed. One of the barns' roofs was lifted and tossed, while the other was peeled and twisted. The tornado continued northeast before lifting.<ref>{{cite report| |
|This tornado first touched down along [[Maryland State Route 313|MD 313]], just south of the [[Caroline County, Maryland|Caroline]]/[[Queen Anne's County, Maryland|Queen Anne's]] county border. Little to no damage was found in this area, however, a small [[tornado debris signature]] appeared on doppler radar. As this tornado moved northeastward, it passed northwest of [[Henderson, Maryland|Henderson]]. In this area, a small horse barn was destroyed, with its walls collapsed, and its roof blown across a yard into a nearby home. The nearby home had damage done to its roof, siding, and chimney. Several trees and tree branches were snapped or uprooted. Later on down the path, two barns were destroyed. One of the barns' roofs was lifted and tossed, while the other was peeled and twisted. The tornado continued northeast before lifting.<ref>{{cite report|via=National Weather Service in Philadelphia, Pennsylvania|title=Maryland Event Report: EF1 Tornado|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=925431|publisher=National Centers for Environmental Information|year=2020|accessdate=January 1, 2023}}</ref> |
||
|- |
|- |
||
|bgcolor="{{storm colour|storm}}" | EF0 |
|bgcolor="{{storm colour|storm}}" | EF0 |
||
Line 96: | Line 104: | ||
|[[Montgomery County, Pennsylvania|Montgomery]] |
|[[Montgomery County, Pennsylvania|Montgomery]] |
||
|[[Pennsylvania|PA]] |
|[[Pennsylvania|PA]] |
||
|{{Coord|40. |
|{{Coord|40.23|-75.24|name=Montgomeryville (Nov. 30, EF0)}} |
||
|20: |
|20:52–20:53 |
||
|{{convert|0.87|mi|km|abbr=on|sortable=on}} |
|{{convert|0.87|mi|km|abbr=on|sortable=on}} |
||
|{{convert|100|yd|m|abbr=on|sortable=on}} |
|{{convert|100|yd|m|abbr=on|sortable=on}} |
||
|A brief tornado touched down just east of the [[Pennsylvania Route 309|PA 309]] northbound onramp to the [[U.S. Route 202 in Pennsylvania|US 202]] parkway. As the tornado crossed the US 202 parkway, two small trees were uprooted. Wooden picnic tables outside of a [[Texas Roadhouse]] were tossed, shattering the front window of a nearby closed restaurant. This same restaurant had air-handling equipment and siding torn from the building. Six to eight cars in the parking lots of both the Texas Roadhouse and the nearby restaurant were either shaken or tossed by the tornado. Several small tree branches were snapped in the area. Metal light posts were bent at the base, and two stop signs were either bent over or removed from the ground. A supporting pole at the entrance of a nearby [[Staybridge Suites]] was damaged. The tornado inflicted minor damage to roofing at a [[Costco]] before lifting less than one minute after it touched down.<ref>{{cite report |
|A brief tornado touched down just east of the [[Pennsylvania Route 309|PA 309]] northbound onramp to the [[U.S. Route 202 in Pennsylvania|US 202]] parkway. As the tornado crossed the US 202 parkway, two small trees were uprooted. Wooden picnic tables outside of a [[Texas Roadhouse]] were tossed, shattering the front window of a nearby closed restaurant. This same restaurant had air-handling equipment and siding torn from the building. Six to eight cars in the parking lots of both the Texas Roadhouse and the nearby restaurant were either shaken or tossed by the tornado. Several small tree branches were snapped in the area. Metal light posts were bent at the base, and two stop signs were either bent over or removed from the ground. A supporting pole at the entrance of a nearby [[Staybridge Suites]] was damaged. The tornado inflicted minor damage to roofing at a [[Costco]] before lifting less than one minute after it touched down.<ref>{{cite report|title=Storm Events Database November 30, 2020|url=https://www.ncdc.noaa.gov/stormevents/eventdetails.jsp?id=925438|publisher=National Centers for Environmental Information|access-date=February 24, 2021}}</ref> |
||
|- |
|- |
||
|} |
|} |
||
Line 109: | Line 117: | ||
* [[Tornado outbreak and floods of April 28 – May 1, 2017]] |
* [[Tornado outbreak and floods of April 28 – May 1, 2017]] |
||
* [[Tornado outbreak and blizzard of April 13–15, 2018]] |
* [[Tornado outbreak and blizzard of April 13–15, 2018]] |
||
* [[March 2021 North American storm complex]] |
|||
==Notes== |
==Notes== |
||
Line 120: | Line 127: | ||
* [https://www.wpc.ncep.noaa.gov/storm_summaries/2020/finalarchive_2020.shtml 2020 Storm Summaries] from the [[Weather Prediction Center]] |
* [https://www.wpc.ncep.noaa.gov/storm_summaries/2020/finalarchive_2020.shtml 2020 Storm Summaries] from the [[Weather Prediction Center]] |
||
{{2020–21 North American winter buttons}} |
|||
{{United States winter storms}} |
{{United States winter storms}} |
||
{{2020 tornado outbreaks}} |
{{2020 tornado outbreaks}} |
||
{{Maryland tornado events}} |
|||
{{DEFAULTSORT:2020-11-29 Tornado Outbreak}} |
|||
[[Category:2020 in North America]] |
|||
[[Category: |
[[Category:2020 in North America|Tornado Outbreak, 11-20]] |
||
[[Category:2020–21 North American winter|Tornado Outbreak, 2020-11-29]] |
|||
[[Category:F0 and F1 tornadoes]] |
[[Category:F0 and F1 tornadoes]] |
||
[[Category:Tornadoes in Maryland]] |
[[Category:Tornadoes in Maryland]] |
||
[[Category:2020 meteorology]] |
[[Category:2020 meteorology|Tornado, 11-29]] |
||
[[Category:Tornadoes of 2020]] |
[[Category:Tornadoes of 2020|11-20]] |
||
[[Category:Tornadoes in Florida]] |
[[Category:Tornadoes in Florida]] |
||
[[Category:Tornadoes in Pennsylvania]] |
[[Category:Tornadoes in Pennsylvania]] |
Latest revision as of 07:49, 3 September 2024
It has been suggested that this article be merged with 2020–21 North American winter. (Discuss) Proposed since June 2024. |
Meteorological history | |
---|---|
Formed | November 29, 2020 |
Dissipated | December 2, 2020 |
Winter storm | |
Highest gusts | 115 km/h (70 mph) |
Lowest pressure | 993 hPa (mbar); 29.32 inHg |
Maximum snowfall or ice accretion | 24 in (61 cm) at Thompson, Ohio |
Tornado outbreak | |
Tornadoes | 5 |
Maximum rating | EF1 tornado |
Duration | 12 hours, 43 minutes |
Overall effects | |
Fatalities | None confirmed |
Damage | >$100 million (2020 USD)[1] |
Areas affected | Southern United States, Ohio Valley, Northeastern United States, Eastern Canada |
Power outages | >100,000 |
Part of the 2020–21 North American winter and tornado outbreaks of 2020 |
The November 2020 North American storm complex was a major early-season snowstorm that impacted most of the Ohio Valley from November 30–December 2 with heavy snow, gusty winds, and near-whiteout conditions. The system originated from a weak gulf low off the coast of Texas on November 29, which began to move northeastward onto land the next day. It then began to strengthen, as well as slowing its movement down, resulting in heavy, wind-driven snow for prolonged periods of time in the Ohio Valley. It also triggered a major lake-effect snow event from December 1–2 as the system stalled over Lake Ontario, resulting in additional heavy snowfall. The storm system was also responsible for a severe thunderstorm outbreak in the Southeast and Mid-Atlantic regions, causing 22 severe thunderstorms and 5 tornadoes. In total, the system is estimated to have caused at least $100 million (2020 USD) in damages.[1] It was unofficially named Winter Storm Dane by The Weather Channel.[2]
Meteorological history
[edit]The system formed as a weak low-pressure system off the coast of southeastern Texas early on November 29. After meandering eastward for around 12 hours, the low-pressure made landfall and came ashore in southeastern Louisiana at 18:00 UTC.[3] It then turned northeastward, beginning to strengthen and spawning a secondary low-pressure to the east.[4] By 15:00 UTC on November 30, the system had spawned two more low-pressures, and the main low had reached an initial intensity of 995 millibars (29.4 inHg).[5] The system reached a peak intensity of 993 millibars (29.3 inHg) at 00:00 UTC on December 1, while two of the low-pressure areas dissipated and the main low stalled out over Lake Ontario.[6] Another low-pressure dissipated a few hours later, leaving only the main low remaining, which began to slowly weaken.[7] The system continued weakening throughout December 1, and by early on December 2, it had begun moving to the northeast again.[8] After continuing to weaken for several hours, it dissipated late on December 2.[9]
Preparations and impact
[edit]Winter Storm Warnings were issued in parts of Ohio and Pennsylvania, mainly along the shores of Lake Erie due to the potential for heavy snow. Winter Weather Advisories were issued in a broad swath farther south, stretching all the way down to eastern Tennessee.[2]
Ohio Valley
[edit]A fairly large area of Ohio and Pennsylvania picked up over 10 inches (25 cm) of snow, with the highest totals near Lake Erie. Snow fell in Cleveland all day November 30, and the city saw 10.1 inches (26 cm) of snow during the event. Areas near Cleveland, such as Thompson, Ohio, saw as much as 24 inches (61 cm) of snow, due to lake-effect enhancement. Trees and power lines were downed in the Cleveland area due to the heavy snow and strong winds.[2] Elnora, Indiana had received nearly 7 inches (18 cm) by the time snow had ended.[10] Detroit, Pittsburgh, Columbus, and other areas further away from Lake Erie generally saw 1–4 inches (2.5–10.2 cm) of snow from the system.[2]
Southern Appalachians
[edit]In Arab, Alabama, 1 inch (2.5 cm) of snow was measured. Around 0.5 inches (1.3 cm) of snow was reported in the Murfreesboro, Tennessee area. The Gatlinburg and Pigeon Forge areas had seen up to 5 inches (13 cm). By the end of the night, Mount Le Conte, Tennessee had seen 11 inches (28 cm) inches of snow, as reported by the National Weather Service.[10] Roan Mountain, Tennessee had seen 12 inches (30 cm) by the time snow and finished, and Robbinsville, North Carolina picked up a total of 15 inches (38 cm) from the system.[2]
Northeast
[edit]This section needs expansion. You can help by adding to it. (August 2024) |
On November 30, the Verrazano Narrows Bridge closed all lanes due to high wind conditions.[11] The bridge shaking resulted in viral social media videos.[12]
Severe weather
[edit]The warm side of the system also resulted in some severe thunderstorms in the Southeast and Mid-Atlantic regions. Several of the storms became tornadic, with at least five tornadoes being confirmed on November 30. The storms also resulted in 22 reports of wind damage in an area from Maryland to eastern Pennsylvania.[13][14]
EFU | EF0 | EF1 | EF2 | EF3 | EF4 | EF5 | Total |
---|---|---|---|---|---|---|---|
1 | 2 | 2 | 0 | 0 | 0 | 0 | 5 |
Confirmed tornadoes
[edit]EF# | Location | County / Parish | State | Start Coord. | Time (UTC) | Path length | Max width | Summary |
---|---|---|---|---|---|---|---|---|
EF1 | NNW of Hamburg to SE of Nankin | Madison | FL | 30°35′32″N 83°31′20″W / 30.5923°N 83.5222°W | 08:10–08:18 | 5.52 mi (8.88 km) | 475 yd (434 m) | Significant tree damage and minor damage to a home occurred near where this tornado touched down. The tornado was at its strongest and its widest point as it continued to significantly damage trees, and cause damage to multiple farm outbuildings. As the tornado narrowed, it snapped many pine trees. The tornado lifted near SR 53, just south of the Florida/Georgia state border.[15] |
EFU | East Lake to NE of Odessa | Pinellas, Hillsborough, Pasco | FL | 28°06′N 82°41′W / 28.1°N 82.69°W | 11:00–11:25 | 12.45 mi (20.04 km) | 50 yd (46 m) | Despite this tornado touching down intermittently for over 12 mi (19 km), only damage reported was downed tree limbs and blown around patio furniture.[16][17] |
EF1 | E of Port Deposit to Woodlawn | Cecil | MD | 39°38′38″N 76°03′47″W / 39.644°N 76.063°W | 19:37–19:42 | 3.36 mi (5.41 km) | 75 yd (69 m) | Many trees were snapped or uprooted at the beginning of the path, including some near a home. As the tornado moved northeast, it damaged newly installed power poles near another home. Additional trees and power poles were damaged. The tornado was at its strongest point when a front porch awning was lifted. Damage to other homes occurred, including damage to roof shingles and siding. One home's garage door was bent inward. Trees were snapped or uprooted along the rest of the path before the tornado lifted.[18] |
EF0 | NNW of Baltimore Corner to SW of Templeville | Caroline | MD | 39°04′03″N 75°51′07″W / 39.0675°N 75.8520°W | 20:13–20:20 | 5.32 mi (8.56 km) | 75 yd (69 m) | This tornado first touched down along MD 313, just south of the Caroline/Queen Anne's county border. Little to no damage was found in this area, however, a small tornado debris signature appeared on doppler radar. As this tornado moved northeastward, it passed northwest of Henderson. In this area, a small horse barn was destroyed, with its walls collapsed, and its roof blown across a yard into a nearby home. The nearby home had damage done to its roof, siding, and chimney. Several trees and tree branches were snapped or uprooted. Later on down the path, two barns were destroyed. One of the barns' roofs was lifted and tossed, while the other was peeled and twisted. The tornado continued northeast before lifting.[19] |
EF0 | Montgomeryville | Montgomery | PA | 40°14′N 75°14′W / 40.23°N 75.24°W | 20:52–20:53 | 0.87 mi (1.40 km) | 100 yd (91 m) | A brief tornado touched down just east of the PA 309 northbound onramp to the US 202 parkway. As the tornado crossed the US 202 parkway, two small trees were uprooted. Wooden picnic tables outside of a Texas Roadhouse were tossed, shattering the front window of a nearby closed restaurant. This same restaurant had air-handling equipment and siding torn from the building. Six to eight cars in the parking lots of both the Texas Roadhouse and the nearby restaurant were either shaken or tossed by the tornado. Several small tree branches were snapped in the area. Metal light posts were bent at the base, and two stop signs were either bent over or removed from the ground. A supporting pole at the entrance of a nearby Staybridge Suites was damaged. The tornado inflicted minor damage to roofing at a Costco before lifting less than one minute after it touched down.[20] |
See also
[edit]- April 2016 North American storm complex
- Tornado outbreak and floods of April 28 – May 1, 2017
- Tornado outbreak and blizzard of April 13–15, 2018
Notes
[edit]- ^ All dates are based on the local time zone where the tornado touched down; however, all times are in Coordinated Universal Time for consistency.
References
[edit]- ^ a b "Global Catastrophe Recap – November 2020" (PDF). Aon Benfield. December 10, 2020. p. 4. Retrieved March 6, 2021.
- ^ a b c d e "Winter Storm Brought Wind-Driven Snow to Eastern Great Lakes, Appalachians". weather.com. December 2, 2020.
- ^ "WPC Surface Analysis Archive".
- ^ "WPC Surface Analysis Archive".
- ^ "WPC Surface Analysis Archive".
- ^ "WPC Surface Analysis Archive".
- ^ "WPC Surface Analysis Archive".
- ^ "WPC Surface Analysis Archive".
- ^ "WPC Surface Analysis Archive".
- ^ a b Sadler, Megan (5 December 2020). "More snow at LeConte Lodge creates magical winter scene". WVLT.
- ^ High wind conditions lead to closures on Verrazzano-Narrows Bridge, News 12 The Bronx, December 1, 2020
- ^ Watch a harrowing video of the Verrazzano Bridge rocking and groaning in Monday's high winds, Timeout, December 2, 2020
- ^ "Storm Prediction Center 20201129's Storm Reports". www.spc.noaa.gov. Retrieved 3 December 2020.
- ^ "Storm Prediction Center 20201130's Storm Reports". www.spc.noaa.gov. Retrieved 3 December 2020.
- ^ Florida Event Report: EF1 Tornado (Report). National Centers for Environmental Information. 2020. Retrieved January 1, 2023 – via National Weather Service in Tallahassee, Florida.
- ^ Storm Events Database November 30, 2020 (Report). National Centers for Environmental Information. Retrieved February 24, 2021.
- ^ Florida Event Report: EFU Tornado (Report). National Centers for Environmental Information. 2020. Retrieved January 1, 2023 – via National Weather Service in Tampa, Florida.
- ^ Maryland Event Report: EF1 Tornado (Report). National Centers for Environmental Information. 2020. Retrieved January 1, 2023 – via National Weather Service in Baltimore, Maryland.
- ^ Maryland Event Report: EF1 Tornado (Report). National Centers for Environmental Information. 2020. Retrieved January 1, 2023 – via National Weather Service in Philadelphia, Pennsylvania.
- ^ Storm Events Database November 30, 2020 (Report). National Centers for Environmental Information. Retrieved February 24, 2021.