A weak cold front moving into a relatively unstable air mass across the Champlain Valley into western Vermont developed scattered thunderstorms during the afternoon of August 5th. A few of these thunderstorms produced isolated and minor wind damage.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS BTV wrote it up.
A weak cold front moving into a relatively unstable air mass across the Champlain Valley into western Vermont developed scattered thunderstorms during the afternoon of August 5th. A few of these thunderstorms produced isolated and minor wind damage.
The local office's own words before the first event, 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 the first event at Aug 5, 12:29 PM EST, 1 hour 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BURLINGTON VT 129 PM EDT TUE AUG 5 2014 .SYNOPSIS... A COLD FRONT SHIFTING SOUTHEASTWARD FROM ONTARIO AND QUEBEC WILL BRING WIDELY SCATTERED SHOWERS AND THUNDERSTORMS TO THE NORTH COUNTRY THIS AFTERNOON. A FEW STRONGER STORMS ARE POSSIBLE...WITH BRIEF HEAVY DOWNPOURS AND SMALL HAIL. THE FRONT CLEARS THE AREA TO THE SOUTH SETTING UP A PLEASANT DAY ON WEDNESDAY WITH LOWER HUMIDITY LEVELS AND HIGH TEMPERATURES MAINLY IN THE MID TO UPPER 70S. AN UPPER-LEVEL DISTURBANCE WILL BRING ADDITIONAL SHOWERS AND ISOLATED THUNDERSTORMS TO THE REGION FOR THURSDAY AFTERNOON. ACTIVITY WILL BE MOST WIDESPREAD ACROSS VERMONT. GENERALLY FAIR CONDITIONS ARE EXPECTED WITH HIGH PRESSURE ON FRIDAY AND THROUGH THE WEEKEND...WITH AFTERNOON TEMPERATURES CLIMBING BACK INTO THE LOWER 80S. && .NEAR TERM /UNTIL 7 PM THIS EVENING/... AS OF 1253 PM EDT TUESDAY...CONVECTION IS QUICKLY DEVELOPING OVER THE PAST HOUR. AND JUST A FEW MINUTES AGO WE HAD THE FIRST LIGHTNING STROKE IN THE CELL NORTH OF PLATTSBURGH (WHICH BY THE WAY HAS A LITTLE BIT OF HAIL WELL ALOFT IN IT). LATEST LAPS MESOANALYSIS SHOWS 1500-2500 J/KG CAPE FOR MOST OF VERMONT, THANKS IN LARGE PART TO TEMPERATURES IN THE UPPER 70S TO LOWER 80S AND DEWPOINTS IN THE LOW/MID 60S. CAPE VALUES ARE LOWER ACROSS NORTHERN NEW YORK DUE TO THE EARLIER CLOUDINESS WHICH HAVE HELD BACK TEMPERATURES A LITTLE BIT. AS TYPICAL, THE FIRST CONVECTION HAS BEEN ALONG THE EASTERN SLOPES OF THE 'DACKS. MOST OF THE 12Z/15Z RUNS OF MESO-SCALE MODELS SHOW THIS TO ONE EXTENT OR ANOTHER. THESE CELLS THEN DEVELOP AND PUSH EAST AS ADDITIONAL CONVECTION SHOULD FORM ALONG THE CENTRAL GREEN MOUNTAINS ABOUT 18Z. WESTERLY STEERING FLOW ALOFT SHOULD THEN MEAN THE BULK OF THE SHOWERS/STORMS ARE INTO EASTERN VERMONT AFTER 4-5PM. SURFACE FRONT STILL NOT QUITE TO THE ST LAWRENCE VALLEY, BUT IT WILL SLOWLY BE WORKING ITS WAY ACROSS NORTHERN NEW YORK DURING THE AFTERNOON. COULD SEE A FEW ADDITIONAL SCATTERED SHOWERS/ISOLATED T-STORMS FIRE AHEAD OF THAT. MESO-MODELS ALSO INDICATE THIS POSSIBILITY. SMALL HAIL STILL LOOKING LIKE THE MAIN ISSUE WITH ANY STRONGER T-STORMS THAT COULD DEVELOP. SO THE FORECAST UPDATE HAS BEEN PRIMARILY TO TRY TO BETTER TIME/LOCATE THE HIGHER LEVEL OF CONVECTIVE COVERAGE. RELIED ON A MIX OF BTV4, BTV6 AND HRRR MODELS. BASICALLY MAKES THE NORTHERN HALF OF VERMONT AS THE FOCUS OF CONVECTION. TWEAKED TEMPERATURES A BIT UP AS WELL, ESPECIALLY FOR VERMONT. BTV ALREADY REACHED 81F, SO PRIOR TO THE SHOWERS COMING INTO THE AREA, WE COULD RISE ANOTHER DEGREE OR TWO. OTHERWISE, WE'LL SEE HOW THIS AFTERNOON EVOLVES. NOT EVERYONE WILL SEE ANY SHOWERS/STORMS, BUT ENOUGH ON THE RADAR SCOPE TO KEEP IT INTERESTING. && .SHORT TERM /7 PM THIS EVENING THROUGH THURSDAY/... AS OF 314 AM EDT TUESDAY...THE WEAK COLD FRONTAL BOUNDARY SLIDES FAR ENOUGH SEWD INTO SOUTHERN NEW ENGLAND THAT OUR WEATHER SHOULD BE PRECIPITATION FREE ON WEDNESDAY. KEPT JUST A SLIGHT CHANCE OF A SHOWER (20 POP) ACROSS PORTIONS OF RUTLAND/WINDSOR COUNTIES...AND DRY ELSEWHERE. ALSO LOOKING AT SOME LOWER HUMIDITY BEING USHERED IN BEHIND THE FRONT...WITH SFC DEWPOINTS DROPPING INTO THE LOWER 50S. 850MB TEMPS OF +10C TO +11C SUPPORT AFTERNOON HIGHS IN THE MID-UPR 70S FOR MOST LOCATIONS. MOSTLY SUNNY SKIES AND LIGHT NW WINDS WILL MAKE FOR A PLEASANT DAY. GENERALLY TRANQUIL WEDNESDAY NIGHT...THOUGH WE/LL NEED TO WATCH A SHORTWAVE TROUGH MOVING SEWD FROM ONTARIO/SWRN QUEBEC THROUGH THE PARENT LONGWAVE TROUGH. THIS EMBEDDED FEATURE MAY REACH THE ST. LAWRENCE VALLEY DURING THE PRE-DAWN HOURS. SOME INDICATIONS IN 00Z GFS/NAM/BTV-4KM WRF THAT THIS SHORTWAVE TROUGH WILL BE ASSOCIATED WITH RAIN SHOWER ACTIVITY MOVING INTO THE ST. LAWRENCE VALLEY BETWEEN 09-12Z. OTHERWISE...LOOKING AT DRY AND MOSTLY CLEAR CONDITIONS ELSEWHERE. SHOULD SET UP A FAVORABLE CONDITIONS FOR RADIATIONAL FOG IN THE VALLEYS OF CENTRAL/ERN VT. LOWS WEDNESDAY NIGHT EXPECTED IN THE LOW-MID 50S...EXCEPT MID-UPR 40S IN THE ADIRONDACKS AND VERMONT'S NORTHEAST KINGDOM. PREVAILING CYCLONIC MID-TROPOSPHERIC FLOW AND PASSAGE OF EMBEDDED SHORTWAVE TROUGH AND THERMAL TROUGH DURING DAYTIME HEATING WILL RESULT IN DEVELOPMENT OF SCATTERED SHOWERS AND PERHAPS ISOLD TSTM ACTIVITY FOR THURSDAY AFTERNOON. WITH SFC DEWPOINTS ONLY IN THE 50S...CAPE VALUES WILL BE RATHER MODEST (AROUND 500-1000 J/KG AT BEST)...AND WITH ONLY 15-20 KTS OF NWLY DEEP-LAYER FLOW...NOT ANTICIPATING ANY SEVERE THREAT. IT APPEARS BASED ON PROJECTED TIMING THAT THE BEST FORCING WILL BE ACROSS VERMONT COINCIDENT WITH DAYTIME HEATING. THUS...HAVE PLACED THE HIGHEST POPS ACROSS VT AND THAT IS ALSO WHERE THE BEST POTENTIAL EXISTS FOR SURFACE- BASED THUNDERSTORM ACTIVITY. HIGHS GENERALLY IN THE LOW-MID 70S WITH INTERVALS OF PARTLY SUNNY CONDITIONS AWAY FROM SHOWERS AND TSTMS. NOT ANTICIPATING A WASHOUT...BUT THOSE WITH OUTDOOR PLANS SHOULD ANTICIPATE SOME SHOWER/THUNDERSTORM ACTIVITY AROUND WITH PERHAPS A BRIEF DOWNPOUR...ESPECIALLY FOR THE AFTERNOON HOURS. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... AS OF 333 AM EDT TUESDAY...THURSDAY NIGHT WILL SEE DECREASING SHOWERS AND STORMS AS THE COLD FRONT MOVES THROUGH THE REGION FROM WEST TO EAST. AN UPPER LEVEL WAVE EMBEDDED IN FLOW AROUND TROUGH WILL KEEP LINGERING SHOWERS ACROSS PORTIONS OF THE NORTHEAST KINGDOM ON FRIDAY. COVERAGE OF SHOWERS WILL BE LIMITED DUE TO DRYING NW FLOW DEVELOPING AS SFC HIGH PRESSURE BUILDS IN OVER SERN CANADA. 500 MB HT LEVEL INCREASES NOTICEABLY OVER THE WEEKEND...RESULTING IN DRY FORECAST. AS THE RIDGE CRESTS OVER THE REGION SATURDAY...S/SW FLOW WILL RETURN...FILTERING WARMER AIR. THIS WILL RESULT IN WARMING TREND...WITH MAX TEMPS FRIDAY AND SATURDAY RANGING FROM L60S TO L80S. TEMPERATURES INCREASE DURING THE WEEK WITH MAXES REACHING THE L80S IN THE VALLEYS. MIN TEMPERATURES WILL BE IN THE M50S IN THE MTNS AND U50S TO L60S IN THE VALLEYS. MONDAY MAY BE THE LAST COMPLETELY DRY DAY AS UPPER TROUGH APPROACHES FROM THE WEST. && .AVIATION /17Z TUESDAY THROUGH SUNDAY/... THROUGH 18Z WEDNESDAY...THOUGH PRIMARILY VFR...A MIX OF FLIGHT CATEGORIES ANTICIPATED THIS AFTN/EVENING WITH BRIEF MVFR TO IFR VISIBILITY IN SHOWERS/THUNDERSTORMS...MVFR CEILINGS AND POSSIBLE MIST DEVELOPMENT AT MSS AND SLK. REGIONAL RADAR SHOWS SCT SHOWERS/THUNDERSTORMS DEVELOPING AHEAD OF A COLD FRONT. INITIAL DEVELOPMENT IN THE CHAMPLAIN VALLEY AND EASTERN ADIRONDACKS...AND EXPECT AREAL COVERAGE TO INCREASE INTO THE AFTN/EVENING HRS. PRIMARY THREAT AREA FOR THUNDER AT PBG AND THE VT TAFS WITH ANY THUNDERSTORM CAPABLE OF DOWNPOURS...LOCAL TURBULENCE AND PERHAPS SOME SMALL HAIL. HAVE INDICATED VCTS FOR THESE TAFS UNDER THOSE EXPECTATIONS...WITH VCSH INDICATED AT SLK AND MSS WHERE AIRMASS IS A LITTLE MORE STABLE UNDER OVERCAST. WILL AMEND FOR LOWER VISIBILITY. COLD FRONT PUSHES SLOWLY SOUTH INTO THE OVERNIGHT...THOUGH BASED ON UPSTREAM OBS SKIES ARE NOT LIKELY TO FULLY CLEAR OUT EXCEPT AT SLK AND MSS THROUGH THE PRE-DAWN HOURS. FOR THAT REASON HAVE OPTED TO INTRODUCE SCT-BKN VFR/MVFR CEILINGS AND SHOW MIST AT MSS AND SLK. MORE SIGNIFICANT LIFTING OF CEILINGS AFTER 12Z. SOUTH WINDS AHEAD OF THE FRONT TO BECOME MORE VARIABLE AS FRONT APPROACHES...THEN TURNING NORTHERLY 4-6 KTS INTO WEDNESDAY. OUTLOOK 18Z WEDNESDAY THROUGH SATURDAY... 18Z WEDNESDAY THROUGH 12Z FRIDAY...PREDOMINANTLY VFR ALTHOUGH A CHANCE OF SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS EACH AFTERNOON AND EVENING...ALONG WITH THE POTENTIAL FOR IFR/LIFR FOG/BR DEVELOPMENT EACH NIGHT...MAINLY MPV/SLK. 12Z FRIDAY ONWARD...VFR UNDER BUILDING HIGH PRESSURE...HOWEVER PERIODS OF IFR IN FOG/BR POSSIBLE AT NIGHT...AGAIN MAINLY MPV/SLK. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...NONE. NY...NONE. && SYNOPSIS...BANACOS NEAR TERM...NASH SHORT TERM...BANACOS LONG TERM...KGM AVIATION...LOCONTO
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BURLINGTON VT 313 AM EDT TUE AUG 5 2014 NYZ026>031-034-035-087-VTZ001>012-016>019-060715- 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- 313 AM EDT TUE AUG 5 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN VERMONT. .DAY ONE...TODAY AND TONIGHT. SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON ALONG AND AHEAD OF A COLD FRONT APPROACHING FROM SOUTHEAST ONTARIO. A FEW STRONGER STORMS ARE EXPECTED TO PRODUCE SMALL HAIL...DOWNPOURS...AND DANGEROUS CLOUD TO GROUND LIGHTNING. THUNDERSTORMS WILL BE MOST WIDESPREAD FROM THE ADIRONDACKS EASTWARD ACROSS VERMONT. THE THUNDERSTORM ACTIVITY WILL GRADUALLY DIMINISH AND PUSH SOUTH OF THE AREA DURING THE EVENING HOURS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
223 PM EDT TUE AUG 5 2014
VTZ002-003-005-006-008-009-011-016>019-051915-
EASTERN ADDISON VT-EASTERN CHITTENDEN VT-EASTERN FRANKLIN VT-
EASTERN RUTLAND VT-LAMOILLE VT-ORLEANS VT-WASHINGTON VT-
WESTERN ADDISON VT-WESTERN CHITTENDEN VT-WESTERN FRANKLIN VT-
WESTERN RUTLAND VT-
223 PM EDT TUE AUG 5 2014
...THUNDERSTORMS DEVELOPING OVER THE CHAMPLAIN VALLEY...
AT 220PM, WEATHER RADAR INDICATED THUNDERSTORMS DEVELOPING OVER THE
CHAMPLAIN VALLEY. THESE THUNDERSTORMS WERE MOVING TO THE EAST AT 20
MPH. THESE STORMS WILL PRODUCE BRIEF HEAVY DOWNPOURS AND LIGHTNING.
A FEW OF THE STORMS WILL HAVE THE CAPABILITY OF PRODUCING WIND GUSTS
IN EXCESS TO 40 MPH AND HAIL TO THE SIZE OF DIMES.
GET TO SAFETY IMMEDIATELY WHEN THREATENING WEATHER APPROACHES.
BOATERS ON LAKE CHAMPLAIN SHOULD SEEK SAFE HARBOR. STRONG WINDS WILL
CAUSE HIGHER WAVES AND SUDDEN WIND SHIFTS MAY OVERTURN SMALL BOATS.
LAT...LON 4501 7255 4402 7269 4402 7275 4386 7287
4390 7288 4387 7297 4383 7296 4386 7288
4383 7281 4380 7278 4372 7282 4369 7274
4336 7278 4337 7284 4333 7287 4336 7326
4354 7325 4358 7330 4501 7311
NASHThe Burlington radar (KCXX), 19 km away, was scanning. The volume nearest the first event began at 19:00 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
Isolated Large Willow tree downed by brief thunderstorm winds.
Dime size hail reported.
Tree and several other limbs down on Swamp road.
A few trees down along Route 133.
A few large limbs, grater than 8 inches in diameter downed by thunderstorm winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Vermont in 2014Every state in 2014This day in weather historyWarnings in Vermont, August 2014
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 525481, 525480, 525483, 525484, 525485.