The remnants of a cold front moved into a marginally unstable air mass during the afternoon of July 20th and promoted the development of scattered showers and thunderstorms across Vermont. One isolated thunderstorm produced a localized microburst in Glover and other wind damage in West Burke.
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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.
The remnants of a cold front moved into a marginally unstable air mass during the afternoon of July 20th and promoted the development of scattered showers and thunderstorms across Vermont. One isolated thunderstorm produced a localized microburst in Glover and other wind damage in West Burke.
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 Jul 20, 11:47 AM EST, 56 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BURLINGTON VT 1247 PM EDT SAT JUL 20 2013 .SYNOPSIS... MORE SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AS A COLD FRONT TRAVERSES ACROSS THE NORTH COUNTRY. IN ADDITION...THE HEAT WAVE OF THE PAST FEW DAYS WILL COME TO AN END WITH HIGHS IN THE 80S SATURDAY...THEN COOLING MORE SUNDAY AND MONDAY WITH HIGHS IN THE 70S AND LOWS IN THE 40S AND 50S. THE NEXT CHANCE FOR RAIN WILL BE MONDAY NIGHT INTO TUESDAY. && .NEAR TERM /UNTIL 8 PM THIS EVENING/... AS OF 1243 PM EDT SATURDAY...SHOWERS AND CANT RULE OUT A DVLPG TSRA MVG THRU CHMPL VLY INTO >1000 J/KG AIRMASS TRU 130-2PM. TSRA ACTVTY SHLD BE SHORTLY AND WITH GRTST INSTABILITY IN LWR CT RVR VLY...THAT IF AT ANYTIME MAY CONTAIN AN ISOLD +TSRA. MOST OF ACTVTY OUT OF FA BY/AFT 4 PM. LLVL INSTABILITY REMAINS BEHIND FROPA BUT MID-LVL DRYING PREVENTING ANYTHING IN ST LWRNC VLY ATTM. I CANT RULE OUT ISOLD SHRA/TSRA AFT INTIAL ACTVTY. PREVIOUS DISCUSSION...ERLR ACTIVITY HAS STABILZED MUCH OF THE AREA WITH CLDS HOLDING TEMPS INTO THE 70S AND CAPE VALUES ONLY A 200-300 J/KG ATTM. ULVL SHORTWAVE MVG INTO GRT LAKES IS ACCOUNTING FOR SOME LIFT AND SHRA DVLPMNT IN SRN ADRNDKS. ATTM...IN THE NEXT FEW HRS XCPTG GTR SHRA AND PSBL TSRA ACTVTY TO DEVELOP IN A GENERAL CORRIDOR SW-NE CORRIDOR 30N-S OF KBTV AS IS CURRENTLY BEING EVIDENCED BY RADAR. IT WILL BE THE SRN EXTENT THAT WITH GTR BREAKS IN CLD COVER AND HIGHER CAPES THAT TSRA MAY BECOME ROBUST BY ERLY AFTN AND HAVE TO WATCH CLOSELY. N OF THIS BNDRY...SHRA AND ISOLD TSRA PSBL. MAX T HAVE BEEN LOWERED IN SPOTS TO ACCOUNT FOR CRNT CLD COVER AND TEMPS AS OF 10 AM. && .SHORT TERM /8 PM THIS EVENING THROUGH MONDAY/... AS OF 449 AM EDT SATURDAY...SHOWER AND TSTMS WINDING DOWN AND EXITING SERN VT THIS EVENING AFTER FRONTAL PASSAGE. COLD AIR ADVECTION SETTLES IN TONIGHT INTO SUNDAY...WITH SURFACE DEWPOINTS DROPPING INTO THE 40S BY SUNDAY. SURFACE HIGH PRESSURE BUILDS IN RESULTING IN SUNSHINE...DRY AIR...AND SEASONABLE BUT COOLER TEMPS THROUGH TUESDAY. MAX TEMPS OVER THE HIGH TRRN WILL BE IN THE 60S AND M70S TO L80S IN THE VALLEYS FOR THE BEGINNING OF THE WEEK. MIN TEMPS WILL BE IN THE 40S AND 50S WITH THE COLDER NIGHT BEING MONDAY NIGHT. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... AS OF 350 AM EDT SATURDAY...GENERALLY FOLLOWED THE 00Z GFS FOR THIS FORECAST CYCLE...THOUGH SIGNIFICANT DIFFERENCE EXIST BETWEEN THE 00Z ECMWF AND 00Z GFS WEDNESDAY NIGHT THROUGH FRIDAY. ANTICIPATE ACTIVE WEATHER ON TUESDAY WITH THE PROSPECT FOR TSTMS CONTAINING LOCALLY HEAVY DOWNPOURS. FORECAST PERIOD BEGINS WITH A WARM FRONT TO OUR SOUTH FROM THE OHIO VALLEY EWD ACROSS CENTRAL PA AND OFF THE NJ COAST MONDAY EVENING. A SHORTWAVE TROUGH ACROSS OHIO WILL TRANSLATE SLOWLY NEWD...AND 500MB FLOW GENERALLY BECOMES INCREASINGLY CYCLONIC LATE MONDAY NIGHT THRU TUESDAY. THERE IS STRONG MOISTURE ADVECTION ON LOW-LEVEL SLY FLOW INTO THE NORTH COUNTRY TOWARD TUESDAY MORNING...AND PW VALUES REACH 1.8-2.05" PER 00Z GFS AT 18Z TUESDAY. NOT ANTICIPATING MUCH SEVERE WEATHER THREAT...BUT WITH THE PROSPECT OF FREEZING LEVELS OF 13-14 KFT...WARM RAIN PROCESSES COULD BRING LOCALLY HEAVY DOWNPOURS WITH ANY TSTMS DURING THE DAY TUESDAY. HAVE INDICATED POPS 60-70 PERCENT FOR TUESDAY. SYSTEM SHIFTS EWD WITH COLD FRONT PUSHING SEWD ACROSS THE NORTH COUNTRY DURING TUESDAY NIGHT. SHOULD SEE DIMINISHING SHOWERS FROM NW-SE TUESDAY NIGHT WITH SOMEWHAT COOLER/DRIER AIR MASS RETURNING ON WEDNESDAY. HIGHS TUESDAY WILL BE NEAR 80...AND BACK INTO THE MID- UPR 70S FOR WEDNESDAY. QUESTION THEREAFTER IS HOW AMPLIFIED THE MID-UPR LEVEL FLOW BECOMES WEDNESDAY NIGHT THRU FRIDAY. THE 00Z ECMWF SHOWS A DEEPER TROUGH ACROSS THE ERN CONUS WITH ADDITIONAL CHANCES FOR RAIN ACROSS THE NORTH COUNTRY. THE 00Z GFS IS CLOSER TO ZONAL/SLIGHTLY CYCLONIC 500MB FLOW PATTERN. HAVE OPTED FOR THE 00Z GFS AT THIS POINT TO MAINTAIN FORECAST CONSISTENCY...BUT EVOLUTION COULD CHANGE. TEMPERATURES SHOULD TREND SLIGHTLY WARMER THURSDAY AND FRIDAY WITH HIGH TEMPERATURES BACK INTO THE LOWER/MID 80S. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... THROUGH 12Z SUNDAY...MID-LEVEL CLOUDS WILL PREVAIL ACROSS THE NORTH COUNTRY THROUGH THE REMAINDER OF THIS MORNING. SCATTERED SHOWERS WILL MOVE THRU THE VT TAF LOCATIONS THRU 14Z. LOOKING UPSTREAM...CYCLONIC MID-LEVEL FLOW PERSISTS WITH AN EMBEDDED MID- LEVEL TROUGH ACROSS SERN ONTARIO INTO THE LAKE ERIE AREA. ALSO...A SFC COLD FRONT IS LOCATED NW OF THE GREAT LAKES AND WILL PUSH SEWD INTO THE NORTH COUNTRY THIS AFTN...ULTIMATELY RESULTING IN A NWLY WIND SHIFT TOWARD LATE AFTN/EVENING. WHILE THE BULK OF THE STRONGER TSTM ACTIVITY WILL STAY SOUTH OF OUR REGION...SHOWERS ARE POSSIBLE AT THE TAF LOCATIONS MAINLY 09-15Z...AND BEST CHANCE OF A T-STORM IS AT KRUT/KMPV. ANTICIPATE MAINLY VFR THRU THE PERIOD WITH MORE INTENSE CONVECTION REMAINING SOUTH...BUT BRIEF MVFR OR IFR - ESPECIALLY AT KRUT CAN/T BE RULED OUT THRU THE REMAINDER OF THIS MORNING. ACTIVITY PROGRESSES SEWD THIS AFTN WITH DRY WX AT THE TAF SITES THRU TONIGHT. S-SW WINDS AROUND 10 KTS WITH SOME GUSTS 18-20 KTS THRU THE AFTN...BECG NW 5-10 KTS LATE AFTN AND EVENING. LIGHT NW WINDS AND SCT080-100 FOR THE OVERNIGHT HRS. OUTLOOK 12Z SUNDAY THROUGH WEDNESDAY...DRY SUNDAY AND MONDAY WITH MAINLY VFR CONDITIONS AS SFC HIGH PRESSURE TRANSLATES EWD FROM THE GREAT LAKES ACROSS NY/NEW ENGLAND. ONLY EXCEPTION WOULD BE POSSIBLE RADIATION FOG SLK/MPV 06-12Z MONDAY AND TUESDAY MORNING WITH PERIODS OF IFR. AN UPPER-LEVEL TROUGH BRINGS CHANCES FOR SHOWERS/THUNDERSTORMS TUESDAY INTO TUESDAY NIGHT. SOME THUNDERSTORMS MAY CONTAIN HEAVY RAINFALL AND PERIODS OF IFR CONDITIONS. A COLD FRONT PUSHES SEWD THRU THE AREA TUESDAY NIGHT INTO WED MORNING. MAJORITY OF SHOWER ACTIVITY SHOULD BE OVER/PUSHING SOUTH AND EAST OUT OF THE AREA BY THE DAYLIGHT HRS WEDNESDAY. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...NONE. NY...NONE. && SYNOPSIS...KGM NEAR TERM...KGM/SLW SHORT TERM...KGM LONG TERM...BANACOS AVIATION...BANACOS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BURLINGTON VT 409 AM EDT SAT JUL 20 2013 VTZ005>012-017>019-210830- WESTERN CHITTENDEN-LAMOILLE-CALEDONIA-WASHINGTON-WESTERN ADDISON- ORANGE-WESTERN RUTLAND-WINDSOR-EASTERN CHITTENDEN-EASTERN ADDISON- EASTERN RUTLAND- 409 AM EDT SAT JUL 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN VERMONT. .DAY ONE...TODAY AND TONIGHT. A STRONG COLD FRONT WILL TRAVERSE ACROSS THE NORTH COUNTRY TODAY...TRIGGERING SHOWERS AND THUNDERSTORMS IN THE WARM MOIST AIRMASS AHEAD OF THE FRONT. ANY THUNDERSTORMS THAT DEVELOP WILL HAVE THE POTENTIAL TO BECOME STRONG...AND POSSIBLY SEVERE MAINLY ACROSS CENTRAL AND SOUTHERN VERMONT LATE THIS MORNING INTO THIS AFTERNOON. THESE THUNDERSTORMS MAY PRODUCE GUSTY WINDS...SMALL HAIL AND HEAVY DOWNPOURS. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. NYZ026>031-034-035-087-VTZ001>004-016-210830- 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-EASTERN FRANKLIN- 409 AM EDT SAT JUL 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...AND NORTHERN VERMONT. .DAY ONE...TODAY AND TONIGHT. A STRONG COLD FRONT WILL TRAVERSE ACROSS THE NORTH COUNTRY TODAY...TRIGGERING SHOWERS AND THUNDERSTORMS IN THE WARM MOIST AIRMASS AHEAD OF THE FRONT. ANY THUNDERSTORMS THAT DEVELOP WILL HAVE THE POTENTIAL TO BECOME STRONG...AND MAY PRODUCE GUSTY WINDS AND HEAVY RAINFALL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. KGM
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BURLINGTON VT
142 PM EDT SAT JUL 20 2013
VTZ003-004-006>008-201845-
CALEDONIA VT-ESSEX VT-LAMOILLE VT-ORLEANS VT-WASHINGTON VT-
142 PM EDT SAT JUL 20 2013
...SHOWERS AND THUNDERSTORMS WITH GUSTY WINDS WILL MOVE THROUGH
CENTRAL ESSEX...NORTHEASTERN WASHINGTON...NORTHERN
CALEDONIA...SOUTHERN LAMOILLE AND SOUTHERN ORLEANS COUNTIES...
AT 136 PM EDT...A LINE OF SHOWERS AND THUNDERSTORMS PRODUCING
LOCALLY HEAVY RAINFALL AND GUSTY WINDS EXTENDED FROM WEST
GLOVER TO WOLCOTT TO SMUGGLERS NOTCH...MOVING EAST AT 40 MPH.
WIND GUSTS UP TO 40 MPH ARE POSSIBLE WITH THESE STORMS. DOPPLER
RADAR ESTIMATES THAT UP TO AN INCH OF RAIN HAS FALLEN IN A SHORT
PERIOD OF TIME WITH THIS LINE OF HEAVY SHOWERS AND STORMS. HEAVY
RAIN WILL CAUSE WATER TO POND ON ROADS AND IN POOR DRAINAGE AREAS.
LOCATIONS IMPACTED INCLUDE BUT ARE NOT LIMITED TO...
WESTMORE...EAST BROWNINGTON...GREENSBORO BEND...WHEELOCK...
FERDINAND...WEST BURKE...BRUNSWICK SPRINGS...NORTH WALDEN...NORTH
KIRBY...VICTORY...ST. JOHNSBURY CENTER...EXIT 22 I91...
GET TO SAFETY IMMEDIATELY WHEN THREATENING WEATHER APPROACHES.
LAT...LON 4456 7156 4456 7159 4453 7157 4448 7159
4444 7195 4453 7282 4461 7257 4483 7227
4476 7161 4473 7162 4466 7158 4465 7155
4459 7153
LOCONTOThe Burlington radar (KCXX), 77 km away, was scanning. The volume nearest the first event began at 17:43 UTC.
2 thunderstorm wind. Local standard time, as filed.
Numerous trees reported down as well as some shingle and roof damage in Glover.
Scattered tree damage in West Burke, including on Burke Hill road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Vermont in 2013Every state in 2013This day in weather historyWarnings in Vermont, July 2013
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: 455292, 455294.