Alert archive / Vermont / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 32, NWS Burlington, VT

July 4, 2002Franklin County, Lamoille County, Vermont

NWS Burlington, VT issued this severe thunderstorm warning at Jul 4, 2002, 1:41 PM EDT for Franklin County, Lamoille County, Vermont. It was in force for 49 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: Jul 4, 2002, 1:41 PM EDT (17:41 UTC)
Expired: Jul 4, 2002, 2:30 PM EDT
In force: 49 min
Issued by: NWS Burlington, VT
Area: Whole counties

Counties Franklin County, VT, Lamoille County, VT

The radar

The Burlington radar (KCXX), 39 km from the middle of the area, began a volume at 17:43 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
Jul 4, 12:30 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 5.7 hours before the alert went out and 221 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: 2495 J/kg
Mixed-layer CIN: -69 J/kg
Mixed-layer LCL: 1276 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

625 
WUUS51 KBTV 041741
SVRBTV
VTC011-015-041830-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BURLINGTON VT
141 PM EDT THU JUL 4 2002

THE NATIONAL WEATHER SERVICE IN BURLINGTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  FRANKLIN COUNTY IN VERMONT
  LAMOILLE COUNTY IN VERMONT

* UNTIL 230 PM EDT

* AT 133 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM NEAR BAKERSFIELD...MOVING EAST AT AROUND 
  30 MPH.

* THE SEVERE THUNDERSTORM WILL BE...
  NEAR BELVIDERE...BAKERSFIELD AROUND 140 PM EDT
  JUST NORTH OF EDEN AROUND 150 PM EDT

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.

IF YOU ARE CAUGHT OUTSIDE DURING THUNDERSTORMS...SEEK SHELTER IN A
DITCH. CROUCH DOWN LOW TO THE GROUND AND COVER YOUR HEAD.

.END

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 4, 12:42 PM EDT, 59 minutes earlier.

Area forecast discussion, Jul 4, 12:42 PM EDT, 59 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
1242 PM EDT THU JUL 4 2002

HV UPDTD FCST FOR SVR TSTM WATCH UNTIL 6PM. MADE A FEW ADJUSTMENTS
TO TEMPS BASED ON CURRENT READINGS AND TOOK OUT MNTN OF PCPN FOR ST
LAW CNTY.

.BTV...SVR TSTM WATCH VTZ001>012...NYZ027>031-034-035

MCGILL

In the hours before

Special weather statement, Jul 4, 12:43 PM EDT, 58 minutes before

NYC019-031-033-VTC001-005-007-009-011-013-015-017-019-021-023-
027-042200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
1243 PM EDT THU JUL 4 2002

...THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM
WATCH ACROSS MUCH OF NORTHERN NEW YORK AND ALL OF VERMONT UNTIL
600 PM EDT...

IN NEW YORK THIS WATCH INCLUDES THE COUNTIES OF...CLINTON...FRANKLIN
AND ESSEX. IN VERMONT THIS WATCH INCLUDES THE COUNTIES
OF...ESSEX...GRAND ISLE...FRANKLIN...ORLEANS...LAMOILLE...
CALEDONIA...CHITTENDEN...WASHINGTON...ADDISON...ORANGE...WINDSOR AND
RUTLAND.

A COLD FRONT WILL BE MOVING DOWN ACROSS THE REGION TODAY FROM THE
NORTH. THUNDERSTORMS WILL BE DEVELOPING ACROSS THE REGION TODAY
AHEAD OF THIS FRONT.

PERSONS WITH OUTDOOR ACTIVITIES SHOULD KEEP AN EYE ON THE SKY AND
SEEK SHELTER INDOORS IMMEDIATELY SHOULD THUNDERSTORMS APPROACH. STAY
TUNED TO NOAA WEATHER RADIO FOR LATER STATEMENTS AND WARNINGS FROM
THE NATIONAL WEATHER SERVICE IN BURLINGTON VERMONT.

MURRAY/WFO BTV

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 9:00 PM EDT	Severe Thunderstorm Warning	BTV	Grand Isle	30 min
Jul 3, 10:01 PM EDT	Severe Thunderstorm Warning	BTV	Lamoille	29 min
Jul 3, 10:14 PM EDT	Severe Thunderstorm Warning	BTV	Orleans	46 min
Jul 3, 10:46 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia	44 min
Jul 4, 1:07 PM EDT	Severe Thunderstorm Warning	BTV	Caledonia, Orleans	53 min
Jul 4, 1:18 PM EDT	Severe Thunderstorm Warning	BTV	Addison, Washington	42 min
Jul 4, 1:57 PM EDT	Severe Thunderstorm Warning	BTV	Washington	48 min
Jul 4, 2:06 PM EDT	Severe Thunderstorm Warning	BTV	Orleans	54 min
Jul 4, 2:20 PM EDT	Severe Thunderstorm Warning	BTV	Orange	55 min
Jul 4, 2:51 PM EDT	Severe Thunderstorm Warning	BTV	Chittenden	24 min
Jul 4, 3:14 PM EDT	Severe Thunderstorm Warning	BTV	Orange	61 min
Jul 4, 3:16 PM EDT	Flash Flood Warning	BTV	Washington	3 hr
Jul 4, 4:01 PM EDT	Flash Flood Warning	BTV	Washington	3 hr
Jul 4, 4:02 PM EDT	Flash Flood Warning	BTV	Orange	3 hr
Jul 4, 4:13 PM EDT	Severe Thunderstorm Warning	BTV	Orange	47 min
Jul 4, 6:13 PM EDT	Severe Thunderstorm Warning	BTV	Windsor	32 min

Nearby

Severe Thunderstorm Warnings in Vermont, 2002 Every severe thunderstorm warning in 2002

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.