Alert archive / New York / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 93, NWS Burlington, VT

August 18, 2008Franklin County, St. Lawrence County, New York

NWS Burlington, VT issued this severe thunderstorm warning at Aug 18, 2008, 5:34 PM EDT for Franklin County, St. Lawrence County, New York. It was in force for 86 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 18, 2008, 5:34 PM EDT (21:34 UTC)
Expired
Aug 18, 2008, 7:00 PM EDT
In force
86 min
Issued by
NWS Burlington, VT
Area
Storm-based polygon

Counties Franklin County, NY, St. Lawrence County, NY

The radar

The Ft Drum radar (KTYX), 117 km from the middle of the area, began a volume at 21:34 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 18, 3:12 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.6 hours before the alert went out and 218 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2008-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 71 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2008-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 56 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
71 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
877 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
56 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

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 18, 4:05 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, Aug 18, 4:05 PM EDT, 1 hour 29 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BURLINGTON VT
405 PM EDT MON AUG 18 2008

.SYNOPSIS...
A STRONG FRONTAL BOUNDARY WILL PUSH SOUTH THROUGH THE NORTH
COUNTRY INTO THE EVENING HOURS. THIS WILL BRING PRECIPITATION TO
THE REGION DURING THIS TIME. HIGH PRESSURE THEN BUILDS OVER THE
AREA DURING THE DAY TUESDAY...RIGHT INTO THE END OF THE WEEK. A
FRONTAL BOUNDARY WILL APPROACH THE REGION BY THE WEEKEND FOR
ANOTHER ROUND OF PRECIPITATION.

&&

.NEAR TERM /THROUGH TONIGHT/...
AS OF 405 PM EDT MONDAY...REGION UNDER SVR THUNDERSTORM WATCH ATTM
AS STRONG FRNTL BOUNDARY SLOWLY TRUDGES SOUTHWARD. TEMPS ACROSS
THE REGION INTO THE 70S/80S WITH TD/S INTO THE 60S. UNSTABLE
AIRMASS WILL SUPPORT POTENTIAL SEVERE TS WITH WIND AND HAIL. MDLS
HAVE SHOWN SLOW MVMNT W/ FRNT WHICH PUTS ACTIVITY AFT EVENING
COMMUTE...ALTHOUGH SCT TS POPPING UP AHEAD OF SYSTEM. EXPECTING
THIS TO PUSH THRU THE CWA OVERNGT.

&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/...
AS OF 405 PM EDT MONDAY...FRNTL BOUNDARY WILL BE SOUTH OF THE CWA
BY TUESDAY MORN. NORTHERLY FLOW AHEAD OF APPROACHING SFC RIDGE
WILL KEEP LL CLD COVER OVER MUCH OF THE CWA THRU THE MORNING HRS.
WILL BEGIN TO THIN OUT DURING THE AFTNOON AND FINALLY CLR BY THE
EVENING. THIS WILL SET UP THE CWA FOR A NICE RADIATIONAL COOLING
NIGHT. MDL GUIDANCE TEMPS PUT PORTIONS OF THE DACKS INTO THE
30S...WHICH WOULD GIVE THE POTENTIAL FOR SOME SCT FROST. 850 TEMP
0F 2-4C OVER THE DACKS W/ CLR SKIES WOULD SUPPORT THIS...SO NEXT
SHIFT WILL HAVE TO DECIDE IF A FROST ADVISORY IS WARRANTED. HIGH
PRESSURE CRESTS OVERHD ON WED FOR ANOTHER NICE DRY DAY OVER THE
AREA.

&&

.LONG TERM /THURSDAY THROUGH MONDAY/...
AS OF 240 PM EDT MONDAY...HIGH PRESSURE CENTER MOVES OVER REGION
ON THURSDAY...AND SHIFTS SLOWLY EAST INTO THE GULF OF MAINE BY
SATURDAY. GRADUAL MODERATION IN TEMPS EXPECTED THURSDAY THROUGH
SATURDAY AS AIRMASS MODIFIES AND RETURN SOUTHERLY FLOW DEVELOPS BY
NEXT WEEKEND. AN INCREASE IN MOISTURE EXPECTED BY SUNDAY IN
ADVANCE OF UPPER LEVEL TROUGH AND ASSOCIATED COLD FRONT DROPPING
SOUTHEAST FROM THE GREAT LAKES REGION. BEST CHANCE FOR SEEING SOME
SHOWERS AND THUNDERSTORMS WITH THIS FEATURE LOOKS TO BE SUNDAY
AFTERNOON INTO EARLY MONDAY.

&&

.AVIATION /20Z MONDAY THROUGH SATURDAY/...
THROUGH 18Z TUESDAY...ATMOSPHERE DESTABILIZING ACROSS THE FORECAST
AREA AT THIS TIME IN ADVANCE OF STRONG COLD FRONT...WHICH WILL
DROP SOUTH ACROSS THE REGION TONIGHT. EXPECT SOME SCATTERED
THUNDERSTORMS TO DEVELOP ACROSS VERMONT AND NORTHERN NEW YORK THIS
AFTERNOON AND HAVE INCLUDED A MENTION OF CB AND VCTS TO ACCOUNT
FOR THIS. MORE ORGANIZED LINE OF THUNDERSTORMS DEVELOPING AHEAD OF
AFORMENTIONED CDFNT OVER SOUTHERN CANADA ATTM. EXPECT THIS ACTIVITY
TO AFFECT FORECAST AREA MAINLY BTWN 00Z-06Z TUES. A PERIOD OF IFR
CONDITIONS AND PERHAPS SOME STRONG WIND GUSTS AND HAIL ARE POSSIBLE
WITH THESE STORMS. THE COLD FRONT SHOULD BE ALONG THE CANADIAN
BORDER BY 00Z...AND SOUTH OF THE REGION BY 08Z TUES. BRISK SW
WINDS DEVELOPING ACROS THE AREA TODAY IN ADVANCE OF THE FRONT (15
GUSTING 25 KTS). WINDS WILL DIMINISH AFTER 00Z AND SHIFT INTO NW
OVRNGHT WITH PASSAGE OF FRONT. POST FRONTAL LLVL MSTR LINGERS ACRS
MUCH OF THE AREA LATE TONIGHT INTO TUESDAY MORNING. ANY SHWRS WILL
END...BUT SOME AREAS OF MVFR/IFR CIGS WILL PERSIST TILL ABOUT 14Z
TUES...AFTER WHICH TIME THERE WILL BE A DECREASE IN CLOUD COVER.

18Z TUESDAY THROUGH SATURDAY...A RIDGE OF HIGH PRESSURE WILL BUILD
SOUTHEAST FROM THE GREAT LAKES TUESDAY AND BE OVER VERMONT AND
NORTHERN NEW YORK THROUGH FRIDAY...MOVING OFF THE EAST COAST
SATURDAY. MAINLY VFR CONDITIONS EXPECTED THROUGH THE PERIOD. SOME
AREAS OF RADIATION FOG ARE POSSIBLE THROUGH THE PERIOD IN THE
SHELTERED VALLEYS...MAINLY BTWN 06Z-12Z EACH DAY...INCLUDING TAF
SITES KMPV/KLSK.

&&

.BTV WATCHES/WARNINGS/ADVISORIES...
VT...NONE.
NY...NONE.

&&

SYNOPSIS...JN
NEAR TERM...JN
SHORT TERM...JN
LONG TERM...RJS
AVIATION...RJS
Hazardous weather outlook, Aug 18, 3:50 PM EDT, 1 hour 44 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BURLINGTON VT
350 PM EDT MON AUG 18 2008

NYZ026>031-034-035-087-VTZ001>012-016>019-192000-
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-ORLEANS-ESSEX-WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-
WASHINGTON-WESTERN ADDISON-ORANGE-WESTERN RUTLAND-WINDSOR-
EASTERN FRANKLIN-EASTERN CHITTENDEN-EASTERN ADDISON-EASTERN RUTLAND-
350 PM EDT MON AUG 18 2008

...SEVERE THUNDERSTORM WATCH 838 IN EFFECT UNTIL 10 PM EDT THIS
EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL
VERMONT...NORTHEAST 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...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

In the hours before

Special weather statement, Aug 18, 3:48 PM EDT, 1 hour 46 minutes before
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Special weather statement, Aug 18, 4:14 PM EDT, 1 hour 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
414 PM EDT MON AUG 18 2008

NYZ027-028-030-031-034-035-VTZ001-002-182115-
NORTHERN FRANKLIN-EASTERN CLINTON-SOUTHERN FRANKLIN-
WESTERN CLINTON-WESTERN ESSEX-EASTERN ESSEX-GRAND ISLE-
WESTERN FRANKLIN-
INCLUDING THE CITIES OF...MALONE...PLATTSBURGH...SARANAC LAKE...
TUPPER LAKE...DANNEMORA...LAKE PLACID...PORT HENRY...
TICONDEROGA...ALBURGH...SOUTH HERO...ST. ALBANS
414 PM EDT MON AUG 18 2008

...SPECIAL WEATHER STATEMENT...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATES SHOWERS AND
THUNDERSTORMS ARE STARTING TO DEVELOP ACROSS NORTHEASTERN NEW YORK
AND EXTREME NORTHWESTERN VERMONT...INCLUDING NORTHERN LAKE CHAMPLAIN. THIS
TREND IS EXPECTED TO CONTINUE THROUGH THIS LATE THIS AFTERNOON
INTO THIS EVENING. VERY HEAVY DOWNPOURS...SMALL HAIL...AND
FREQUENT LIGHTNING CAN BE EXPECTED WITH ANY THUNDERSTORMS THAT
DEVELOP.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR THE ENTIRE AREA
UNTIL 10 PM. PLEASE STAY TUNED TO NOAA WEATHER RADIO AND OTHER
MEDIA OUTLETS ON THIS DEVELOPING WEATHER SITUATION.

MB
Special weather statement, Aug 18, 4:36 PM EDT, 58 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
436 PM EDT MON AUG 18 2008

NYZ026-027-029-087-182230-
NORTHERN FRANKLIN-NORTHERN ST. LAWRENCE-SOUTHWESTERN ST.
LAWRENCE-SOUTHEASTERN ST. LAWRENCE-
INCLUDING...CANTON...MASSENA...OGDENSBURG AND POTSDAM
436 PM EDT MON AUG 18 2008

AT 430 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A LINE OF STRONG TO SEVERE THUNDERSTORMS ACROSS SOUTHERN CANADA...
FROM JUST NORTHWEST OF MONTREAL...EXTENDING SOUTHWEST TO OTTAWA TO
PETERBOROUGH...MOVING SOUTHEAST AT 30 MPH.

THESE STORMS WILL MOVE INTO THE WESTERN PORTIONS OF SAINT LAWRENCE
COUNTY BY 6 PM...INCLUDING THE CITIES OF MASSENA...OGDENSBURG...AND
GOUVERNEUR. STRONG GUSTY WINDS...SMALL HAIL AND WIND GUSTS OF 35 MPH
OR HIGHER MAY ACCOMPANY THE THUNDERSTORMS AS THEY PASS. A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 10 PM. IF THREATENING
WEATHER APPROACHES...PLEASE SEEK SAFE SHELTER.

JMG
Special weather statement, Aug 18, 5:21 PM EDT, 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
521 PM EDT MON AUG 18 2008

NYZ034-035-VTZ009-011-018-019-182215-
EASTERN ADDISON-WESTERN ADDISON-EASTERN RUTLAND-WESTERN
RUTLAND-EASTERN ESSEX-WESTERN ESSEX-
INCLUDING...MIDDLEBURY
521 PM EDT MON AUG 18 2008

AT 518 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM OVER CROWN POINT IN ESSEX COUNTY NEW YORK...MOVING
EAST AT 28 MPH.

THE THUNDERSTORM WILL BE NEAR CORNWALL...WHITING BY 540 PM...NEAR
SALISBURY...EAST MIDDLEBURY BY 550 PM...NEAR RIPTON BY 600 PM AND
NEAR HANCOCK BY 620 PM.

SMALL HAIL...GUSTY WINDS IN EXCESS OF 35 MPH...AND HEAVY DOWNPOURS
ARE POSSIBLE WITH THIS STORM. SEEK SHELTER IF THREATENING WEATHER
APPROACHES.

MB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 6:32 PM EDTSevere Thunderstorm WarningBTVGrand Isle88 min
Aug 18, 7:17 PM EDTSevere Thunderstorm WarningBTVChittenden, Franklin, Grand Isle, Lamoille, Orleans76 min
Aug 18, 7:45 PM EDTSevere Thunderstorm WarningBTVCaledonia, Essex, Lamoille, Orleans60 min
Aug 18, 7:49 PM EDTSevere Thunderstorm WarningBTVRutland, Windsor56 min

Nearby

Severe Thunderstorm Warnings in New York, 2008Every severe thunderstorm warning in 2008

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.