Alert archive / Vermont / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 55, NWS Burlington, VT

August 21, 2009Addison County, Rutland County, Windsor County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Aug 21, 2009, 2:03 PM EDT for Addison County, Rutland County, Windsor County, Vermont. It was in force for 27 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 21, 2009, 2:03 PM EDT (18:03 UTC)
Expired
Aug 21, 2009, 2:30 PM EDT
In force
27 min
Issued by
NWS Burlington, VT
Area
Storm-based polygon

Counties Addison County, VT, Rutland County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 89 km from the middle of the area, began a volume at 18:05 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 21, 10:47 AM EDTSevere Thunderstorm WatchSPC7 hr

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 21, 1:32 PM EDT, 31 minutes earlier.

Area forecast discussion, Aug 21, 1:32 PM EDT, 31 minutes before
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Hazardous weather outlook, Aug 21, 11:28 AM EDT, 2 hours 35 minutes before
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In the hours before

Special weather statement, Aug 21, 10:36 AM EDT, 3 hours 27 minutes before
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Special weather statement, Aug 21, 11:40 AM EDT, 2 hours 23 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1140 AM EDT FRI AUG 21 2009

VTZ009>012-018-019-211645-
EASTERN ADDISON VT-EASTERN RUTLAND VT-ORANGE VT-WESTERN ADDISON VT-
WESTERN RUTLAND VT-WINDSOR VT-
1140 AM EDT FRI AUG 21 2009

...STRONG THUNDERSTORMS WILL DEVELOP ACROSS
ADDISON...ORANGE...RUTLAND AND WINDSOR COUNTIES THROUGH 1 PM...

AT 1137 AM EDT...A DEVELOPING CLUSTER OF THUNDERSTORMS WERE LOCATED
ACROSS CENTRAL RUTLAND COUNTY...AND MOVE NORTHEAST AT 20 MPH.

WIND GUSTS TO 40 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THESE
STORMS. VERY HEAVY RAIN WILL FALL FROM THESE STORMS...AND WILL CAUSE
WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL
STREAMS.

THESE STORMS WILL BE NEAR PROCTOR AROUND 1145 AM...CHITTENDEN AROUND
NOON...GIFFORD WOODS STATE PARK AROUND 1215 PM...PITTSFIELD AROUND
1230 PM AND ROCHESTER AROUND 1245 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM FRIDAY
EVENING FOR VERMONT.

LAT...LON 4410 7301 4383 7238 4347 7305 4363 7326
Special weather statement, Aug 21, 1:03 PM EDT, 1 hour before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
103 PM EDT FRI AUG 21 2009

VTZ007-008-010-012-211800-
CALEDONIA VT-ORANGE VT-WASHINGTON VT-WINDSOR VT-
103 PM EDT FRI AUG 21 2009

...A STRONG THUNDERSTORM WILL AFFECT CALEDONIA...ORANGE...WASHINGTON
AND WINDSOR COUNTIES...

AT 103 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR RANDOLPH
CENTER...MOVING NORTHEAST AT 25 MPH.

WIND GUSTS TO 50 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.

THIS STORM WILL BE NEAR EAST BROOKFIELD AROUND 115 PM...WASHINGTON
AROUND 130 PM...WEST TOPSHAM AROUND 145 PM AND GROTON AROUND 200 PM.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM FRIDAY
EVENING FOR VERMONT.

LAT...LON 4427 7205 4423 7204 4418 7205 4416 7204
      4386 7258 4399 7275 4443 7218 4430 7202
Special weather statement, Aug 21, 1:28 PM EDT, 35 minutes before
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The office that day

Everything else NWS Burlington, VT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 21, 11:40 AM EDTSpecial Weather StatementBTVRutland65 min
Aug 21, 1:03 PM EDTSpecial Weather StatementBTVOrange57 min
Aug 21, 1:07 PM EDTSevere Thunderstorm WarningBTVCaledonia, Orange, Washington53 min
Aug 21, 1:28 PM EDTSpecial Weather StatementBTVRutland47 min
Aug 21, 1:42 PM EDTAreal Flood AdvisoryBTVAddison, Orange, Rutland, Washington, Windsor3 hr
Aug 21, 2:27 PM EDTSpecial Weather StatementBTVWindsor63 min
Aug 21, 3:07 PM EDTFlash Flood WatchBTVAddison, Caledonia, Essex, Lamoille, Orange, Orleans and 2 more30 hr
Aug 21, 3:37 PM EDTAreal Flood WarningBTVOrange, Windsor3 hr

Nearby

Severe Thunderstorm Warnings in Vermont, 2009Every severe thunderstorm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.