Alert archive / Vermont / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 56, NWS Burlington, VT
NWS Burlington, VT issued this severe thunderstorm warning at Aug 24, 2020, 2:07 PM EDT for Chittenden County, Franklin County, Grand Isle County, Vermont; Clinton County, New York. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 24, 2020, 2:07 PM EDT (18:07 UTC)
- Expired
- Aug 24, 2020, 2:45 PM EDT
- In force
- 38 min
- Issued by
- NWS Burlington, VT
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clinton County, NY, Chittenden County, VT, Franklin County, VT, Grand Isle County, VT
The radar
The Burlington radar (KCXX), 23 km from the middle of the area, began a volume at 18:10 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 6.1 hours before the alert went out and 230 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 21 J/kg
- Mixed-layer CIN
- -214 J/kg
- Mixed-layer LCL
- 1255 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Burlington, VT wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 24, 10:00 AM EDT, 4 hours 7 minutes earlier.
Area forecast discussion, Aug 24, 10:00 AM EDT, 4 hours 7 minutes before
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</html>Hazardous weather outlook, Aug 24, 4:21 AM EDT, 9 hours 46 minutes before
Hazardous Weather Outlook National Weather Service Burlington VT 421 AM EDT Mon Aug 24 2020 NYZ026>031-034-035-087-VTZ001>012-016>019-250830- Northern St. Lawrence-Northern Franklin-Eastern Clinton- Southeastern St. Lawrence-Southern Franklin-Western Clinton- Western Essex-Eastern Essex-Southwestern St. Lawrence-Grand Isle- Western Franklin-Orleans-Essex-Western Chittenden-Lamoille-Caledonia- Washington-Western Addison-Orange-Western Rutland-Windsor- Eastern Franklin-Eastern Chittenden-Eastern Addison-Eastern Rutland- 421 AM EDT Mon Aug 24 2020 This Hazardous Weather Outlook is for northern New York, central Vermont, northeast Vermont, northwest Vermont and southern Vermont. .DAY ONE...Today and tonight. Scattered showers and thunderstorms will develop this afternoon, especially along the International Border. A few strong storms are possible, with gusty winds, dangerous cloud to ground lightning, and brief heavy rainfall the primary threats. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. A strong cold front will move across the region around sunrise on Tuesday through the early afternoon. Scattered showers and thunderstorms will develop along the front. The front will reach the eastern Adirondacks and Champlain Valley by late morning and into eastern Vermont during the afternoon. This region from the eastern Adirondacks into Vermont will have the greatest chance of strong to locally severe storms capable of damaging winds, frequent lightning, and brief heavy rain. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Aug 24, 12:54 PM EDT, 1 hour 13 minutes before
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Special Weather Statement National Weather Service Burlington VT 107 PM EDT Mon Aug 24 2020 NYZ028-030-031-034-035-VTZ005-241745- Eastern Clinton-Southern Franklin-Western Essex-Western Clinton-Eastern Essex-Western Chittenden- 107 PM EDT Mon Aug 24 2020 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN CLINTON...SOUTHEASTERN FRANKLIN...NORTHEASTERN ESSEX AND WEST CENTRAL CHITTENDEN COUNTIES... At 106 PM EDT, a strong thunderstorm was located near Au Sable Forks, moving east at 30 mph. Winds in excess of 40 mph and dime size hail are possible with this storm. Locations impacted include... Willsboro, Au Sable Forks, Keeseville, Port Kent, Shelburne, Charlotte, Colchester, Black Brook, Brown Point, Union Falls, Hatch Point, Willsboro Point, Clintonville, Ligonier Point, Harkness, Boquet River Point, Ausable Forks, Hawkeye, The Four Brothers and Frisbies Point. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. If you are on or near Lake Champlain, get out of the water and move indoors or inside a vehicle. Remember, lightning can strike out to 10 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. LAT...LON 4444 7398 4456 7395 4455 7331 4431 7332 TIME...MOT...LOC 1706Z 277DEG 26KT 4449 7376 Clay
Special weather statement, Aug 24, 1:46 PM EDT, 21 minutes before
Special Weather Statement National Weather Service Burlington VT 146 PM EDT Mon Aug 24 2020 NYZ028-031-034-035-241830- Eastern Clinton-Western Essex-Western Clinton-Eastern Essex- 146 PM EDT Mon Aug 24 2020 ...A STRONG CLUSTER THUNDERSTORM WILL AFFECT SOUTHERN CLINTON AND NORTHEASTERN ESSEX COUNTIES... At 145 PM EDT, a cluster of strong thunderstorm was located near Peasleeville, moving east at 20 mph. Winds in excess of 30 mph and half inch hail are possible with this storm. Locations impacted include... Peru, Schuyler Falls, Peasleeville, Clayburg, Keeseville, Hawkeye, South Plattsburgh, Valcour Island, Ausable Chasm, Day Point, Laphams Mills, Clintonville, Valcour, Harkness and Bluff Point. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. If you are on or near Lake Champlain, get out of the water and move indoors or inside a vehicle. Remember, lightning can strike out to 10 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. LAT...LON 4451 7386 4460 7387 4465 7341 4440 7346 TIME...MOT...LOC 1745Z 275DEG 16KT 4453 7371 Clay
Special weather statement, Aug 24, 1:48 PM EDT, 19 minutes before
Special Weather Statement National Weather Service Burlington VT 148 PM EDT Mon Aug 24 2020 NYZ028-035-VTZ001-005-017-241830- Eastern Clinton-Eastern Essex-Grand Isle-Eastern Chittenden-Western Chittenden- 148 PM EDT Mon Aug 24 2020 ...A CLUSTER OF STRONG THUNDERSTORM WILL AFFECT EASTERN CLINTON...NORTHEASTERN ESSEX...SOUTHERN GRAND ISLE AND WEST CENTRAL CHITTENDEN COUNTIES... At 148 PM EDT, a cluster of strong thunderstorms was located over Burlington, moving east at 20 mph. Winds in excess of 30 mph and half inch hail are possible with this storm. Locations impacted include... Essex Junction, South Burlington, Burlington International Airport, Burlington, St. George, Winooski, Essex, Colchester, Essex Junction Village, Williston, Shelburne, Westford, Hinesburg, Richmond, Milton, Brown Point, North Williston, Appletree Point, Sunset Island and Red Rock Point. Torrential rainfall is also occurring with this storm, and may cause localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. If you are on or near Lake Champlain, get out of the water and move indoors or inside a vehicle. Remember, lightning can strike out to 10 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. LAT...LON 4445 7340 4457 7338 4459 7301 4434 7306 TIME...MOT...LOC 1748Z 275DEG 16KT 4448 7329 Clay
Special weather statement, Aug 24, 1:53 PM EDT, 14 minutes before
Special Weather Statement National Weather Service Burlington VT 153 PM EDT Mon Aug 24 2020 NYZ028-031-VTZ001-002-005-016-241845- Eastern Clinton-Western Clinton-Western Franklin-Grand Isle-Western Chittenden-Eastern Franklin- 153 PM EDT Mon Aug 24 2020 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CLINTON...SOUTHERN GRAND ISLE...NORTHWESTERN CHITTENDEN AND SOUTHWESTERN FRANKLIN COUNTIES... At 153 PM EDT, a strong thunderstorm was located over Beekmantown, moving east at 40 mph. Winds in excess of 30 mph and dime size hail are possible with this storm. Locations impacted include... Plattsburgh, Beekmantown, Fairfax, Georgia, Grand Isle, Milton, South Hero, Georgia Center, Colchester, St. Albans Town, Essex, North Hero, Westford, Fairfield, Isle La Motte, Fletcher, Young Island, Wilcox Point, Hazen Point and West Milton. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 4475 7366 4485 7359 4478 7296 4450 7309 TIME...MOT...LOC 1753Z 290DEG 34KT 4476 7352 Clay
Special weather statement, Aug 24, 2:01 PM EDT, 6 minutes before
Special Weather Statement
National Weather Service Burlington VT
201 PM EDT Mon Aug 24 2020
NYZ026-087-241900-
Northern St. Lawrence-Southwestern St. Lawrence-
201 PM EDT Mon Aug 24 2020
...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN ST. LAWRENCE
COUNTY...
At 200 PM EDT, a strong thunderstorm was located over Ogdensburg,
moving east at 20 mph.
Winds in excess of 30 mph and pea size hail are possible with this
storm.
Locations impacted include...
Ogdensburg, Lisbon, Morley, Madrid, Waddington, Chipman and West
Potsdam.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
LAT...LON 4467 7506 4463 7559 4470 7550 4471 7547
4474 7545 4475 7540 4476 7542 4478 7540
4482 7531 4484 7529 4485 7524 4486 7524
4488 7522 4487 7519 4489 7517 4487 7516
4489 7514
TIME...MOT...LOC 1800Z 256DEG 18KT 4474 7551
NeilesThe office that day
Everything else NWS Burlington, VT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 8:19 PM EDT | Special Weather Statement | BTV | Windsor | 26 min |
| Aug 23, 8:30 PM EDT | Severe Thunderstorm Warning | BTV | Windsor | 30 min |
| Aug 23, 8:48 PM EDT | Special Weather Statement | BTV | Rutland | 27 min |
| Aug 23, 9:11 PM EDT | Special Weather Statement | BTV | Windsor | 19 min |
| Aug 23, 9:13 PM EDT | Special Weather Statement | BTV | Addison | 32 min |
| Aug 23, 10:30 PM EDT | Special Weather Statement | BTV | Orange | 45 min |
| Aug 24, 1:48 PM EDT | Special Weather Statement | BTV | Chittenden | 42 min |
| Aug 24, 1:53 PM EDT | Special Weather Statement | BTV | Grand Isle | 52 min |
| Aug 24, 2:19 PM EDT | Special Weather Statement | BTV | Chittenden | 56 min |
| Aug 24, 2:40 PM EDT | Special Weather Statement | BTV | Chittenden | 50 min |
| Aug 24, 2:56 PM EDT | Special Weather Statement | BTV | Addison | 49 min |
| Aug 24, 3:10 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Chittenden, Washington | 50 min |
| Aug 24, 3:17 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Rutland | 29 min |
| Aug 24, 3:57 PM EDT | Special Weather Statement | BTV | Washington | 48 min |
| Aug 24, 4:01 PM EDT | Special Weather Statement | BTV | Caledonia | 59 min |
| Aug 24, 4:03 PM EDT | Special Weather Statement | BTV | Rutland | 57 min |
| Aug 24, 4:11 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Rutland | 64 min |
| Aug 24, 4:13 PM EDT | Special Weather Statement | BTV | Orange | 47 min |
| Aug 24, 4:37 PM EDT | Special Weather Statement | BTV | Essex | 38 min |
| Aug 24, 5:11 PM EDT | Severe Thunderstorm Warning | BTV | Rutland | 49 min |
| Aug 24, 5:59 PM EDT | Special Weather Statement | BTV | Rutland | 46 min |
| Aug 24, 6:20 PM EDT | Flash Flood Warning | BTV | Rutland | 3 hr |
| Aug 24, 7:07 PM EDT | Special Weather Statement | BTV | Rutland | 38 min |
| Aug 24, 7:38 PM EDT | Special Weather Statement | BTV | Orleans | 52 min |
| Aug 24, 7:41 PM EDT | Special Weather Statement | BTV | Rutland | 34 min |
| Aug 23, 10:21 PM EDT | Special Weather Statement | BTV | St. Lawrence | 54 min |
| Aug 23, 11:11 PM EDT | Special Weather Statement | BTV | St. Lawrence | 64 min |
| Aug 24, 12:09 AM EDT | Special Weather Statement | BTV | Clinton, Franklin | 66 min |
| Aug 24, 12:54 PM EDT | Special Weather Statement | BTV | Clinton | 51 min |
| Aug 24, 1:07 PM EDT | Special Weather Statement | BTV | Clinton | 38 min |
| Aug 24, 1:46 PM EDT | Special Weather Statement | BTV | Clinton | 44 min |
| Aug 24, 2:01 PM EDT | Special Weather Statement | BTV | St. Lawrence | 59 min |
| Aug 24, 3:01 PM EDT | Special Weather Statement | BTV | Warren | 44 min |
Nearby
Severe Thunderstorm Warnings in Vermont, 2020Severe Thunderstorm Warnings in New York, 2020Every severe thunderstorm warning in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.