Alert archive / Vermont / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 21, NWS Burlington, VT
NWS Burlington, VT issued this severe thunderstorm warning at Jun 27, 1991, 9:30 PM EDT for Orleans County, Vermont. It was in force for 45 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 27, 1991, 9:30 PM EDT (01:30 UTC)
- Expired
- Jun 27, 1991, 10:15 PM EDT
- In force
- 45 min
- Issued by
- NWS Burlington, VT
- Area
- Whole counties
County Orleans County, VT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 27, 9:50 PM EDT | Thunderstorm Wind 0 | Orleans, VT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Gray, ME (KPWM), launched 00:00Z, 1.5 hours before the alert went out and 189 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
- 250 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1919 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 142 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KBTV 280133 SVRBTV VTC019-280215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BURLINGTON VT 930 PM EDT THU JUN 27 1991 THE NATIONAL WEATHER SERVICE IN BURLINGTON VT HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION...... IN NORTH CENTRAL VERMONT ...ORLEANS COUNTY A LARGE THUNDERSTORM WITH A VERY STRONG AND GUSTY WIND...HEAVY RAIN...DANGEROUS LIGHTNING AND POSSIBLE HAIL IS MOVING INTO ORLEANS COUNTY AND WILL PASS VERY NEAR OR OVER NEWPORT. WHEN THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DON'T USE TELEPHONES OR ELECTRICAL APPLIANCES UNLESS IN AN EMERGENCY. MOTORISTS SHOULD NOT DRIVE INTO FLOODED AREAS. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS.
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.
In the hours before
Special weather statement, Jun 27, 4:58 PM EDT, 4 hours 32 minutes before
VTZ001-002-003-NYZ011-272300- NORTHERN VERMONT AND NORTHEAST NEW YORK WEATHER UPDATE NATIONAL WEATHER SERVICE BURLINGTON VT 455 PM EDT THU JUN 27 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT NORTHEAST NEW YORK AND CENTRAL AND NORTHERN VERMONT... AN AREA OF THUNDERSTORMS WAS MOVING RAPIDLY THROUGH SOUTHERN QUEBEC INTO EXTREME NORTHERN NEW YORK STATE...NORTHERN CLINTON AND FRANKLIN COUNTY. THE THUNDERSTORMS WERE MOVING TO THE SOUTHEAST NEAR 50 MPH AND WILL MOVE INTO NORTHERN GRAND ISLE AND FRANKLIN COUNTIES OF VERMONT BETWEEN 500 AND 515 PM. THESE THUNDERSTORMS CONTAIN STRONG GUSTY WINDS...HEAVY DOWNPOURS AND POSSIBLE LARGE HAIL. BE PREPARED TO SEEK SHELTER IF THREATENING WEATHER APPWROACHES. BOATERS ACROSS NORTHERN LAKE CHAMPLAIN SHOULD SEEK SAFE HARBOR. OTHERWISE IT/LL REMAIN HOT AND HUMID THROUGHOUT THE REGION THIS EVENING. LAVIS
Special weather statement, Jun 27, 6:11 PM EDT, 3 hours 19 minutes before
VTZ001-002-003-NYZ011-280300- NORTHERN VERMONT AND NORTHEAST NEW YORK WEATHER UPDATE NATIONAL WEATHER SERVICE BURLINGTON VT 610 PM EDT THU JUN 27 1991 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT NORTHCENTRAL AND NORTHEAST VERMONT UNTIL 8 PM....IN VERMONT IT INCLUDES LAMOILLE...WASHINGTON... ORANGE...ESSEX....CALEDONIA AND ORLEANS COUNTIES. THE SEVERE THUNDERSTORM WATCH FOR NORTHEAST NEW YORK AND NORTHWEST VERMONT IS CANCELLED. A LARGE AREA OF SHOWERS AND THUNDERSTORMS CONTINUE OVER THE WATCH AREA. THERE HAS BEEN NO REPORTS OF SEVERE WEATHER FROM THIS OUTBREAK. THE PRECIPITATION CONTINUES TO MOVE TOWARD THE SOUTHEAST AT NEAR 50 MPH AND SHOULD BE OUT OF VERMONT BY 8 PM. THE AREA OF STOvRMS WITH THE HEAVIEST RAINFALL WILL MOVE INTO ESSEX COUNTY VERMONT BY 630 PM. IF STORMS APPROACH YOU...SEEK SHELTER INDOORS UNTIL THEY PASS. END/ADAMSON...
Special weather statement, Jun 27, 6:48 PM EDT, 2 hours 42 minutes before
VTZ001-002-003-NYZ011-280300- NORTHERN VERMONT AND NORTHEAST NEW YORK WEATHER UPDATE NATIONAL WEATHER SERVICE BURLINGTON VT 650 PM EDT THU JUN 27 1991 THE SEVERE THUNDERSTORM WATCH FOR NORTHCENTRAL AND NORTHEAST VERMONT HAS BEEN CANCELLED. THE THUNDERSTORMS HAVE DIMINISHED AND THE THREAT OF SEVERE WEATHER HAS ENDED. A FEW SHOWERS CONTINUE OVER EXTREME NORTHEAST AND NORTH CENTRAL VERMONT BUT THESE SHOWERS WILL PASS OUT OF THE GREEN MOUNTAIN STATE BY 730 PM. WARM...HUMID AND HAZY CONDITIONS WILL CONTINUE OVERNIGHT AND FRIDAY. END/ADAMSOM... END/ADAMSON...
Special weather statement, Jun 27, 8:56 PM EDT, 34 minutes before
VTZ003-280300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 900 PM EDT FRI JUN 27 1991 ...DANGEROUS THUNDERSTORM MOVING TOWARD NORTH CENTRAL ORLEANS COUNTY VERMONT.... A LARGE THUNDERSTORM WITH VERY HEAVY RAIN...A STRONG AND GUSTY WIND AND POSSIBLE HAIL IS MOVING RAPIDLY SOUTHEAST FROM SOUTHERN QUEBEC. THE STORM IS MOVING NEAR 50 MPH AND WILL PASS INTO ORLEANS COUNTY VERMONT BETWEEN 900 AND 915 PM. THE TRACK OF THIS STORM WILL BRING IT OVER OR JUST TO THE EAST OF NEWPORT. IF YOU LIVE IN THIS PART OF ORLEANS COUNTY...KEEP ALERT FOR THIS STORM/S APPROACH AND SEEK SHELTER INDOORS.
Nearby
Severe Thunderstorm Warnings in Vermont, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.