Alert archive / Vermont / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 17, NWS Burlington, VT

July 10, 2001Orange County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jul 10, 2001, 3:15 PM EDT for Orange County, Vermont. It was in force for 30 min. 2 reports 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: Jul 10, 2001, 3:15 PM EDT (19:15 UTC)
Expired: Jul 10, 2001, 3:45 PM EDT
In force: 30 min
Issued by: NWS Burlington, VT
Area: Whole counties

County Orange County, VT

What was reported inside it

Time	Report	Where	Remark
Jul 10, 3:30 PM EDT	Thunderstorm Wind	Braintree, VT
Jul 10, 3:30 PM EDT	Hail 0.88	Chelsea, 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jul 10, 12:45 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 7.3 hours before the alert went out and 170 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 45 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 1003 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KBTV 101916
SVRBTV

VTC017-101945-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
315 PM EDT TUE JUL 10 2001

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS EXTENDED THE

* SEVERE THUNDERSTORM WARNING FOR...

  ORANGE COUNTY IN VERMONT

* UNTIL 345 PM EDT

* AT 311 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES NORTHEAST OF BRAINTREE...MOVING EAST AT
  35 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR EAST RANDOLPH...BROOKFIELD...5 MILES EAST OF BRAINTREE AROUND
  320 PM EDT
  NEAR CHELSEA...6 MILES NORTH OF TUNBRIDGE AROUND 330 PM EDT
  NEAR VERSHIRE...STRAFFORD AROUND 340 PM EDT
  NEAR WEST FAIRLEE AROUND 350 PM EDT

THIS STORM WILL LIKELY PRODUCE LARGE HAIL.

WHEN SEVERE THUNDERSTORMS ARE OCCURRING...MOVE INSIDE A REINFORCED
BUILDING...AWAY FROM WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL
APPLIANCES UNTIL THE STORMS HAVE PASSED.

.END

HANSON

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 Jul 10, 11:13 AM EDT, 4 hours 2 minutes earlier.

Area forecast discussion, Jul 10, 11:13 AM EDT, 4 hours 2 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
1113 AM EDT TUE JUL 10 2001

BATCH OF SHOWERS/TSTMS NOVG ACROSS NORTHERN VT AND THE SOUTHERN
CHAMPLAIN VLY ATTM...WITH AN ISOLATED TSTM IN SRN ST LAWRENCE
COUNTY...WITH SKIES THEN BECOMING PARTLY SUNNY.  HOWEVER...BUFKIT
SOUNDINGS FOR LATER THIS AFTERNOON STILL SHOWING AIRMASS ACROSS THE
AREA UNSTABLE WITH CAPES IN THE 500-1000 J/KG RANGE...SO CANNOT RULE
OUT A CHC OF A LATE DAY SHOWER OR TSTM AFTER THIS FIRST BATCH LATE
THIS MORNING HAS ENDED.  ALSO...HAVE SOME CONCERN WITH SHRTWV JUST
NORTH OF MICHIGAN ATTM DROPPING SEWD WHICH WILL AID IN ANY TSTM
DEVELOPMENT LATE IN THE DAY AND EARLY TONIGHT.  SPC STILL HAS AREA
IN A SLIGHT RISK FOR SEVERE TSTMS TODAY...SO WILL KEEP ENHANCED
WORDING OF GUSTY WINDS AND POSSIBLE HAIL IN THE ZONE FORECASTS FOR
THE REST OF TODAY.  HAVE CUT BACK POPS TO 50 PERCENT FOR THE REST
OF TODAY. OTRW...NO CHGS TO THE REMAINDER OF THE FCST.

.BTV...NONE.

WGH

In the hours before

Special weather statement, Jul 10, 12:54 PM EDT, 2 hours 21 minutes before

NYZ027-028-030-031-034-035-VTZ001>012-102300-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1254 PM EDT TUE JUL 10 2001

...THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WATCH FOR CENTRAL AND NORTHERN VERMONT AND MOST OF NORTHERN NEW YORK
UNTIL 7 PM...

SEVERE THUNDERSTORM WATCH #537 INCLUDES ALL COUNTIES IN CENTRAL
AND NORTHERN VERMONT AS WELL AS FRANKLIN...CLINTON AND
ESSEX COUNTIES IN NEW YORK.

AT 1245 PM...THUNDERSTORMS WERE DEVELOPING WITHIN 50 MILES OF THE
CANADIAN BORDER AHEAD OF A COLD FRONT MOVING SLOWLY SOUTHEASTWARD
AND SPREADING THE THUNDERSTORMS THROUGHOUT THE REST OF THE WATCH
AREA DURING THE AFTERNOON.

A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR THE
DEVELOPMENT OF SEVERE THUNDERSTORMS IN AND NEAR THE WATCH AREA.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND
LARGE HAIL. POTENTIALLY DEADLY CLOUD TO GROUND LIGHTNING AND HEAVY
RAINS ARE LIKELY TO ACCOMPANY ALL THUNDERSTORMS AS WELL.

IT IS ESSENTIAL THAT YOU MONITOR NOAA WEATHER RADIO OR
LOCAL RADIO STATIONS FOR THE LATEST FORECASTS AND POSSIBLE WARNINGS.
ALSO...KEEP A CONTINUOUS WATCH TO THE SKY AND AT FIRST SIGNS OF
THREATENING WEATHER...SEEK SAFE SHELTER INSIDE A ENCLOSED...STURDY
BUILDING OR VEHICLE.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 12:58 PM EDT	Severe Thunderstorm Warning	BTV	Grand Isle	32 min
Jul 10, 1:11 PM EDT	Severe Thunderstorm Warning	BTV	Franklin	49 min
Jul 10, 1:49 PM EDT	Severe Thunderstorm Warning	BTV	Lamoille	41 min
Jul 10, 1:53 PM EDT	Severe Thunderstorm Warning	BTV	Addison	52 min
Jul 10, 2:22 PM EDT	Severe Thunderstorm Warning	BTV	Rutland	38 min
Jul 10, 2:31 PM EDT	Severe Thunderstorm Warning	BTV	Washington	29 min
Jul 10, 2:44 PM EDT	Severe Thunderstorm Warning	BTV	Addison	31 min
Jul 10, 2:51 PM EDT	Severe Thunderstorm Warning	BTV	Orange	24 min
Jul 10, 3:02 PM EDT	Severe Thunderstorm Warning	BTV	Rutland, Windsor	43 min
Jul 10, 4:38 PM EDT	Severe Thunderstorm Warning	BTV	Rutland	37 min
Jul 10, 4:47 PM EDT	Severe Thunderstorm Warning	BTV	Orange	28 min
Jul 10, 5:04 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	41 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2001 Every severe thunderstorm warning in 2001

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.