Alert archive / Vermont / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 25, NWS Burlington, VT
NWS Burlington, VT issued this severe thunderstorm warning at Jun 30, 2009, 2:26 PM EDT for Addison County, Rutland County, Vermont; Essex County, New York. It was in force for 64 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
- Jun 30, 2009, 2:26 PM EDT (18:26 UTC)
- Expired
- Jun 30, 2009, 3:30 PM EDT
- In force
- 64 min
- Issued by
- NWS Burlington, VT
- Area
- Storm-based polygon
Counties Essex County, NY, Addison County, VT, Rutland County, VT
The radar
The Burlington radar (KCXX), 68 km from the middle of the area, began a volume at 18:27 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 11:37 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 6.4 hours before the alert went out and 142 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
- 191 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1100 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 92 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Jun 30, 1:35 PM EDT, 51 minutes earlier.
Area forecast discussion, Jun 30, 1:35 PM EDT, 51 minutes before
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</html>Hazardous weather outlook, Jun 30, 12:07 PM EDT, 2 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BURLINGTON VT 1207 PM EDT TUE JUN 30 2009 NYZ026>031-034-035-087-VTZ001-002-005-009-011-012-016>019-011615- 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-WESTERN CHITTENDEN-WESTERN ADDISON-WESTERN RUTLAND- WINDSOR-EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON- EASTERN RUTLAND- 1207 PM EDT TUE JUN 30 2009 ...SEVERE THUNDERSTORM WATCH 533 IN EFFECT UNTIL 7 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL VERMONT...NORTHWEST VERMONT AND SOUTHERN VERMONT. .DAY ONE...THIS AFTERNOON AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. AS AN UPPER LEVEL LOW PRESSURE SYSTEM OVER THE EASTERN GREAT LAKES MOVES VERY LITTLE...EXPECT MORE SHOWERS AND THUNDERSTORMS WEDNESDAY AND THURSDAY AND THESE STORMS WILL CONTINUE TO HAVE THE POTENTIAL FOR HEAVY DOWNPOURS. THE UNSETTLED WEATHER IS EXPECTED TO CONTINUE INTO THE HOLIDAY WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION HAS BEEN ACTIVATED ACROSS NORTHERN NEW YORK AND VERMONT. VTZ003-004-006>008-010-011615- ORLEANS-ESSEX-LAMOILLE-CALEDONIA-WASHINGTON-ORANGE- 1207 PM EDT TUE JUN 30 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL VERMONT...NORTHEAST VERMONT AND NORTHWEST VERMONT. .DAY ONE...THIS AFTERNOON AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP ACROSS THE NORTHEASTERN HALF OF VERMONT BY LATER THIS AFTERNOON AND INTO THIS EVENING. A FEW OF THE STRONGER STORMS MAY CONTAIN SMALL HAIL AND GUSTY WINDS...BUT SHOULD BE BELOW SEVERE THRESHOLDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. AS AN UPPER LEVEL LOW PRESSURE SYSTEM OVER THE EASTERN GREAT LAKES MOVES VERY LITTLE...EXPECT MORE SHOWERS AND THUNDERSTORMS WEDNESDAY AND THURSDAY AND THESE STORMS WILL CONTINUE TO HAVE THE POTENTIAL FOR HEAVY DOWNPOURS. THE UNSETTLED WEATHER IS EXPECTED TO CONTINUE INTO THE HOLIDAY WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION HAS BEEN ACTIVATED ACROSS VERMONT...MAINLY FOR POSSIBLE SEVERE THUNDERSTORMS ACROSS THE SOUTHERN AND WESTERN PORTIONS OF THE STATE. JMG
In the hours before
Special weather statement, Jun 30, 11:09 AM EDT, 3 hours 17 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 1109 AM EDT TUE JUN 30 2009 NYZ026>031-034-035-087-VTZ001-002-005-009-011-012-016>019-301800- 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-WESTERN CHITTENDEN-WESTERN ADDISON- WESTERN RUTLAND-WINDSOR-EASTERN FRANKLIN-EASTERN CHITTENDEN- EASTERN ADDISON-EASTERN RUTLAND- INCLUDING THE CITIES OF...MASSENA...MALONE...PLATTSBURGH... STAR LAKE...SARANAC LAKE...TUPPER LAKE...DANNEMORA... LAKE PLACID...PORT HENRY...TICONDEROGA...OGDENSBURG...POTSDAM... GOUVERNEUR...ALBURGH...SOUTH HERO...ST. ALBANS...BURLINGTON... MIDDLEBURY...VERGENNES...RUTLAND...SPRINGFIELD... WHITE RIVER JUNCTION...ENOSBURG FALLS...RICHFORD...UNDERHILL... BRISTOL...RIPTON...EAST WALLINGFORD...KILLINGTON 1109 AM EDT TUE JUN 30 2009 ...STRONG THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON... SCATTERED STRONG TO ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ACROSS NORTHERN NEW YORK AND PARTS OF VERMONT. THE GREATEST THREAT AREA WILL BE ALONG AND SOUTH OF A MASSENA TO PLATTSBURGH TO WHITE RIVER JUNCTION LINE...WHERE SURFACE HEATING WILL BE THE STRONGEST...RESULTING IN THE BEST INSTABILITY. THE PRIMARY THREAT WILL BE NICKEL TO QUARTER SIZE HAIL STONES.. ISOLATED WIND DAMAGE MAY ALSO OCCUR. FURTHERMORE...THESE NUMEROUS THUNDERSTORMS WILL HAVE THE POTENTIAL TO PRODUCE VERY HEAVY RAINFALL IN A SHORT PERIOD OF TIME. CURRENT INDICATIONS SUGGEST THE GREATEST RAINFALL AMOUNTS WILL OCCUR ACROSS THE HIGHER TERRAIN OF THE NORTHERN ADIRONDACK MOUNTAINS IN NEW YORK. RAINFALL AMOUNTS OF 1 TO 2 INCHES WITH ISOLATED 3 INCH AMOUNTS WILL BE POSSIBLE...WHICH WILL CAUSE RAPID RISES ON LOCAL STREAMS AND RIVERS AND THE POTENTIAL FOR ISOLATED FLASH FLOODING. PLEASE STAY TUNED TO NOAA WEATHER RADIO...YOUR LOCAL MEDIA...OR GO TO WWW.WEATHER.GOV/BURLINGTON FOR FURTHER UPDATES ON THIS WEATHER SITUATION.
Special weather statement, Jun 30, 11:34 AM EDT, 2 hours 52 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1134 AM EDT TUE JUN 30 2009
NYZ026-027-029-030-087-301630-
NORTHERN FRANKLIN NY-NORTHERN ST. LAWRENCE NY-
SOUTHEASTERN ST. LAWRENCE NY-SOUTHERN FRANKLIN NY-
SOUTHWESTERN ST. LAWRENCE NY-
1134 AM EDT TUE JUN 30 2009
...STRONG THUNDERSTORMS WILL AFFECT FRANKLIN AND ST. LAWRENCE
COUNTIES...
AT 1130 AM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM WEST
POTSDAM TO CARRY FALLS RESERVOIR TO HORSESHOE LAKE...MOVING NORTHEAST
AT 20 MPH.
WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THESE
STORMS.
THESE STORMS WILL BE NEAR NORWOOD AROUND 1145 AM...STOCKHOLM CENTER
AROUND NOON...WINTHROP AROUND 1215 PM AND NORTH LAWRENCE AROUND 1230
PM.
LAT...LON 4466 7406 4442 7399 4440 7414 4415 7410
4413 7415 4413 7424 4409 7457 4409 7464
4440 7474 4467 7525 4493 7458Special weather statement, Jun 30, 12:31 PM EDT, 1 hour 55 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1231 PM EDT TUE JUN 30 2009
NYZ026-027-029>031-087-301730-
NORTHERN FRANKLIN NY-NORTHERN ST. LAWRENCE NY-
SOUTHEASTERN ST. LAWRENCE NY-SOUTHERN FRANKLIN NY-
SOUTHWESTERN ST. LAWRENCE NY-WESTERN CLINTON NY-
1231 PM EDT TUE JUN 30 2009
...STRONG THUNDERSTORMS WILL AFFECT CLINTON...FRANKLIN AND ST.
LAWRENCE COUNTIES...
AT 1230 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM HELENA
TO DICKINSON TO DUANE CENTER TO RAINBOW LAKE TO RAY BROOK...MOVING
NORTHEAST AT 20 MPH.
WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL 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 ROOSEVELTOWN AROUND 1230 PM...HOGANSBURG
AROUND 1245 PM...BOMBAY AROUND 100 PM...WESTVILLE CENTER AROUND 115
PM AND CONSTABLE AROUND 130 PM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM TUESDAY
EVENING FOR NORTHERN NEW YORK AND WESTERN VERMONT.
LAT...LON 4500 7476 4499 7469 4501 7464 4497 7401
4416 7418 4416 7498 4499 7488 4501 7478Special weather statement, Jun 30, 1:06 PM EDT, 1 hour 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 106 PM EDT TUE JUN 30 2009 NYZ028-VTZ001-002-005-301800- EASTERN CLINTON NY-GRAND ISLE VT-WESTERN CHITTENDEN VT- WESTERN FRANKLIN VT- 106 PM EDT TUE JUN 30 2009 ...THUNDERSTORMS WILL AFFECT CHITTENDEN...CLINTON...FRANKLIN AND GRAND ISLE COUNTIES... AT 104 PM EDT...THUNDERSTORMS WERE DEVELOPING IN WESTERN CHITTENDEN COUNTY IN VERMONT...AND WERE MOVING NORTH AT 15 MPH. THESE STORMS MAY PRODUCE SMALL HAIL. HEAVY RAINFALL WILL ALSO BE POSSIBLE. THESE STORMS WILL BE NEAR WEST MILTON AROUND 110 PM...EXIT 18 I89 AROUND 120 PM...GEORGIA PLAINS AROUND 130 PM...BURTON ISLAND STATE PARK AROUND 140 PM...WOODS ISLAND STATE PARK AROUND 150 PM AND NORTH HERO AROUND 200 PM. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM TUESDAY EVENING FOR NORTHERN NEW YORK AND WESTERN VERMONT. LAT...LON 4493 7351 4501 7314 4455 7303 4450 7327 MB
Special weather statement, Jun 30, 2:02 PM EDT, 24 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
202 PM EDT TUE JUN 30 2009
VTZ001-002-005-017-301900-
EASTERN CHITTENDEN VT-GRAND ISLE VT-WESTERN CHITTENDEN VT-
WESTERN FRANKLIN VT-
202 PM EDT TUE JUN 30 2009
...A STRONG THUNDERSTORM WILL AFFECT CHITTENDEN...FRANKLIN AND GRAND
ISLE COUNTIES...
AT 159 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR MALLETTS
BAY...MOVING NORTHEAST AT 10 MPH.
WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
HEAVY RAINFALL IS ALSO POSSIBLE.
THIS STORM WILL BE NEAR EXIT 16 I89 AROUND 215 PM...ESSEX JUNCTION
AROUND 230 PM...COLCHESTER AROUND 245 PM AND MILTON AROUND 300 PM.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM TUESDAY
EVENING FOR NORTHERN NEW YORK AND WESTERN VERMONT.
LAT...LON 4457 7285 4437 7321 4443 7330 4446 7330
4448 7331 4453 7333 4455 7333 4475 7312
MBThe office that day
Everything else NWS Burlington, VT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 1:06 PM EDT | Special Weather Statement | BTV | Grand Isle | 54 min |
| Jun 30, 2:02 PM EDT | Special Weather Statement | BTV | Chittenden | 58 min |
| Jun 30, 3:11 PM EDT | Severe Thunderstorm Warning | BTV | Addison | 64 min |
| Jun 30, 3:23 PM EDT | Flash Flood Watch | BTV | Addison, Chittenden, Franklin, Grand Isle, Rutland | 8 hr |
| Jun 30, 4:21 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Rutland | 54 min |
| Jun 30, 4:51 PM EDT | Severe Thunderstorm Warning | BTV | Rutland | 54 min |
| Jun 30, 5:17 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Rutland | 58 min |
| Jun 30, 5:58 PM EDT | Severe Thunderstorm Warning | BTV | Addison, Chittenden, Franklin, Grand Isle, Lamoille, Washington | 79 min |
| Jun 30, 11:34 AM EDT | Special Weather Statement | BTV | Franklin | 56 min |
| Jun 30, 12:31 PM EDT | Special Weather Statement | BTV | Franklin | 59 min |
| Jun 30, 3:37 PM EDT | Special Weather Statement | BTV | Franklin | 68 min |
| Jun 30, 4:38 PM EDT | Areal Flood Advisory | BTV | Essex | 6 hr |
| Jun 30, 6:33 PM EDT | Areal Flood Advisory | BTV | Clinton | 4 hr |
Nearby
Severe Thunderstorm Warnings in Vermont, 2009Severe Thunderstorm Warnings in New York, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.