An upper atmospheric ridge was dominating much of the United States, with mid-level disturbances traveling along the periphery. During the early morning hours of the 3rd, one of these disturbances created a thunderstorm complex across Quebec, which traveled into Franklin county Vermont.
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.
An upper atmospheric ridge was dominating much of the United States, with mid-level disturbances traveling along the periphery. During the early morning hours of the 3rd, one of these disturbances created a thunderstorm complex across Quebec, which traveled into Franklin county Vermont. This complex resulted in severe thunderstorms that produced damaging winds in the form of trees knocked down in Bakersfield as well as several large branches knocked onto power lines in Enosburg Falls (Franklin county).
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 3, 6:01 AM EST, 29 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BURLINGTON VT 701 AM EDT FRI AUG 3 2007 .SYNOPSIS... THE ATMOSPHERE WILL BECOME INCREASINGLY UNSTABLE TODAY...AND COMBINED WITH AN APPROACHING UPPER LEVEL TROUGH OF LOW PRESSURE...WILL SET THE STAGE FOR SCATTERED THUNDERSTORMS TO DEVELOP MAINLY DURING THE AFTERNOON AND EARLY EVENING HOURS. SOME OF THE STORMS WILL HAVE THE POTENTIAL TO PRODUCE STRONG GUSTY WINDS AND HAIL. COOLER AND DRIER AIR WILL RETURN TO THE NORTH COUNTRY SATURDAY AND SUNDAY AS HIGH PRESSURE BUILDS INTO THE REGION FROM CANADA. && .NEAR TERM /THROUGH TONIGHT/... UPDATED 700 AM...ISSUED UPDATE TO INDICATE ISOLATED THUNDERSTORMS FOR THE CHAMPLAIN VALLEY AND ISSUE A LAKE THUNDERSTORM ADVISORY FOR LAKE CHAMPLAIN. ISOLATED STORMS ARE MOVING NORTHEAST ACROSS THE NORTHERN HALF OF THE CHAMPLAIN VALLEY AND ONE STORM HAS PRODUCED HALF INCH HAIL IN PERU NEW YORK. MAIN SEVERE THREAT STILL LOOKS GOOD FOR THIS AFTERNOON AND EVENING. COMPOSITE ANALYSIS CONTINUES TO SHOW FAVORABLE CONDITIONS FOR STRONG TO SEVERE THUNDERSTORMS ACROSS MUCH OF THE AREA THIS AFTERNOON THROUGH EARLY EVENING. SURFACE TEMPERATURES IN THE MID 80S TO LOWER 90S AND DEW POINTS IN THE MID TO UPPER 60S WILL COMBINE WITH DRY ADIABATIC LAPSE RATES IN THE 850 TO 500 MB LAYER TO PRODUCE CAPE VALUES IN THE 2000-2500 J/KG RANGE. ATMOSPHERE WILL LIKELY BE CAPPED THROUGH MIDDAY...BUT THEN CAP SHOULD WEAKEN SUFFICIENTLY TO ALLOW SCATTERED THUNDERSTORMS TO DEVELOP. AT THIS TIME...DEEP LAYER SHEAR WILL BE INCREASING OVER THE NORTHERN HALF OF THE AREA AND THIS SHOULD HELP STORMS TO BECOME RATHER ORGANIZED. UNIDIRECTIONAL SHEAR NOTED IN FORECAST HODOGRAPHS SUGGESTS STORMS WILL BE LINEAR IN NATURE AND DAMAGING WINDS WILL BE THE MAIN THREAT OF SEVERE. HOWEVER...WITH THAT MUCH INSTABILITY OVER THE AREA ONE CANNOT RULE OUT THE HAIL POTENTIAL AS WELL. FEEL 17Z-01Z WILL BE THE OPTIMAL TIME FRAME FOR THE STORMS TO IMPACT THE AREA. && .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/... CANADIAN HIGH PRESSURE TO MOVE DOWN OVER THE AREA AND TAKE HOLD THROUGH SUNDAY. COOLER AND DRIER AIR MASS IS EXPECTED WITH TEMPERATURES GETTING BACK TO SEASONAL NORMALS BOTH DAYS. SHOULD SEE PLENTY OF SUNSHINE BOTH DAYS WITH SOME INCREASE IN CLOUDS TOWARDS SUNDAY NIGHT. THIS IS IN RESPONSE TO A WARM FRONT THAT WILL BE APPROACHING THE AREA LATE SUNDAY NIGHT INTO EARLY MONDAY MORNING. SOME QUESTION AS TO PRECIPITATION CHANCES LATE SUNDAY NIGHT AS UNCERTAINTY IS QUITE HIGH REGARDING TIMING OF WARM FRONT. CURRENT GRIDS INDICATE SLIGHT CHANCE OF SHOWERS AFTER MIDNIGHT AND WILL CONTINUE WITH THIS IDEA. && .LONG TERM /MONDAY THROUGH THURSDAY/... COMPLICATED PATTERN IN EXTENDED WITH NO STRONG SIGNALS EARLY ON...THUS WL HV CHC SHOWERY DAYS LATE MONDAY INTO MONDAY NIGHT AND AGAIN TUESDAY NIGHT THRU WEDNESDAY. EXACT TIMING OF ONSET AND ENDING TIMES OF SUMMERTIME PCPN AND EXTENDED PDS ALWAYS A CHALLENGE. WRMFNT SPRDS CLDS ACRS AREA DURG MONDAY AS WK SFC LO TRACKS NE ACRS SRN CANADA. WL INDC CHC SHWRS LATE MON AND MON NGT. EXPC DRY WEATHER FIRST PART OF TUE...BUT HV INDCD SLGT CHC SHWR...TO BLEND WITH REGIONAL INDICATIONS. FNTL BNDRY STAGNANTS ACRS NRN NEW ENG-CNTRL NY TUE NGT AND WED AS A WEAK LOW PRES SYS MOVES E ALG FNTL BNDRY NR CANADIAN BORDER. WL INTRODUCE CHC/SCT SHWRS/TSTMS LATE TUE INTO MIDDAY WED. IPVG CONDS LATER WED AND WED NGT WITH JUST SLGT CHC SHWR...THEN DRY THURS AS SFC HI PRES BUILDS ACRS NY/PA THURS. && .AVIATION /12Z FRIDAY THROUGH TUESDAY/... SEVERAL AVIATION CONCERNS FOR THE NEXT 12 TO 24 HRS ACRS OUR TAF SITES. FIRST...WL CONVECTION CRNTLY LOCATED ACRS THE EASTERN END OF LAKE ONTARIO IMPACT MSS/SLK TAF SITES THIS MORNING...FOLLOWED BY POTENTIAL FOR LOW CLOUDS/FOG AT SLK/MPV/PBG LATER THIS MORNING. THEN THE NEXT QUESTION BCMGS AREAL COVERAGE/INTENSITY OF CONVECTION THIS AFTN ACRS OUR TAF SITES ASSOCIATED WITH DEVELOPING TROF AND SFC COLD FRNT. CRNT RADAR AND LIGHTNING ACTIVITY SHOWS THIS ELEVATED CONVECTION BEING FEED BY WARM LAKE WATERS AND A LLVL JET...DISSIPATING ACRS JEFFERSON/LEWIS COUNTIES AS IT ENCOUNTERS STABLE AIRMASS OVER LAND. HOWEVER...WL MENTION VCTS AT SLK/MSS TO COVER POTENTIAL FOR ANY STORMS THRU 09Z THIS MORNING. OTHERWISE...SOME BR/HZ HAS DEVELOPED AT SLK/PBG/MSS AND EXPECT THIS TREND TO CONTINUE THRU 12Z THIS MORNING AS TEMP/DWPT SPREAD IS LIMITED AND SFC WINDS ARE LIGHT. WL MENTION 1/2SM IN FG AT MPV BTWN 08-12Z AND USE TEMPO GROUPS TO COVER REDUCED VIS AT PBG/SLK/MSS THRU 12Z. FOR CONVECTION THIS AFTN...SOUNDINGS AND UPSTREAM WATER VAPOR TRENDS SHOW PLENTY OF DRY AIR IN THE MID/UPPER LVLS...WHICH WL LIMIT OVERALL COVERAGE OF CONVECTION THIS AFTN. HOWEVER...WITH PLENTY OF LLVL INSTABILITY AND GOOD LLVL CONVERGENCE PROVIDED BY APPROACHING SFC COLD FRNT WL MENTION TEMPO GROUP FOR 3SM TSRA BR BTWN 17Z- 1Z FOR SLK/PBG/MSS TAF SITES AND USE PROB30 FOR BTV/MPV/RUT. IN ADDITION...CONVECTIVE TEMPS WL BE REACHED EARLY TODAY...BASED ON STRONG SFC HEATING...THEREFORE EXPECT A FEW-SCT TOWERING CUMULUS CLOUDS TO DEVELOP BY 15Z ACRS TAF SITES TODAY. WL MENTION VCTS BTWN 16Z-24Z TODAY TO COVERAGE POTENTIAL FOR ANY CONVECTION ASSOCIATED WITH PRE-FRNTAL TROF AND TRRN INDUCED STORMS. FEEL ACTIVITY WL QUICKLY DISSIPATE OR SHIFT EAST OF TAF SITES BY 02Z SAT...AS SFC HIGH PRES BUILDS INTO THE REGION. DURG FRI NGT CDFNT SLOWLY MOVS SE ACRS FA. SOME TSTMS FRIDAY PM/EVENING MAY BE ACCOMPANIED BY GSTY WNDS AND SOME HAIL. WL NEED TO MONITOR TSTM POT FRI AFTN BASED ON ANY CLD COVER ASOCD WITH PREFNTL TROF AND PSBL WDSHFT TO WEST THAT CUD IMPACT THE INTENSITY OF THE STORMS. SPC DOES INDC SLGT RISK MST OF OUR AREA ON FRI. HI PRES CNTRL GRTLKS MOVS E ACRS NY SAT AND OFF NEW ENG CST SUN. WRMFNT APRCHS AREA SUN NGT WITH INCRS IN CLDS...WITH CHC SHWRS/TSTMS MONDAY WITH PERIODS OF MVFR IN PCPN. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...NONE. NY...NONE. && SYNOPSIS...EVENSON NEAR TERM...EVENSON SHORT TERM...EVENSON LONG TERM...SFH AVIATION...TABER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BURLINGTON VT 451 AM EDT FRI AUG 3 2007 NYZ026>031-034-035-087-VTZ001>012-016>019-040900- 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- 451 AM EDT FRI AUG 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK...CENTRAL VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN VERMONT. .DAY ONE...TODAY AND TONIGHT SEVERAL BROKEN LINES OF STRONG TO ISOLATED SEVERE THUNDERSTORMS ARE EXPECTED ACROSS NORTHERN NEW YORK AS WELL AS CENTRAL AND NORTHERN VERMONT THROUGH EARLY THIS EVENING. A SURFACE COLD FRONT COMBINED WITH A DISTURBANCE IN THE WINDS ALOFT WILL INTERACT WITH PLENTY OF LOW LEVEL MOISTURE AND INSTABILITY TO FORM SEVERAL BROKEN LINES OF SCATTERED THUNDERSTORMS. THE FIRST LINE OF SCATTERED THUNDERSTORMS WILL BE LOCATED ACROSS THE SAINT LAWRENCE VALLEY EARLY THIS MORNING...WITH HEAVY RAINS AND FREQUENT CLOUD TO GROUND LIGHTNING BEING THE PRIMARY THREAT. MEANWHILE...MORE ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP BY LATE MORNING INTO THE EARLY AFTERNOON ACROSS THE HIGHER TERRAIN OF THE ADIRONDACK MOUNTAINS AND SAINT LAWRENCE VALLEY OF NORTHERN NEW YORK. THESE STORMS WILL SPREAD EAST INTO THE CHAMPLAIN VALLEY AND PARTS OF THE NORTHERN AND CENTRAL GREEN MOUNTAINS OF VERMONT...WHILE INCREASING IN AREAL COVERAGE AND INTENSITY THROUGHOUT THE AFTERNOON HOURS. GIVEN THE LARGE AMOUNT OF LOW LEVEL INSTABILITY...THESE STORMS WILL HAVE THE POTENTIAL TO BECOME STRONG TO SEVERE. THE PRIMARY SEVERE WEATHER THREAT WILL BE STRONG AND DAMAGING THUNDERSTORM WIND GUSTS...ALONG WITH ISOLATED LARGE HAIL. IN ADDITION...THE STRONGER STORMS WILL HAVE THE POTENTIAL TO PRODUCE 1 TO 2 INCHES OF RAINFALL IN A SHORT PERIOD OF TIME...WHICH MAY CAUSE MINOR LOW LYING AND POOR DRAINAGE FLOODING. THE THUNDERSTORM ACTIVITY...ALONG WITH THE SEVERE WEATHER THREAT WILL DIMINISH TOWARD SUNSET THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED ACROSS NORTHERN NEW YORK AS WELL AS CENTRAL AND NORTHERN VERMONT BY NOON TODAY. TABER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 638 AM EDT FRI AUG 3 2007 NYZ028-VTZ001-002-005-031145- WESTERN CHITTENDEN-EASTERN CLINTON-GRAND ISLE-WESTERN FRANKLIN- INCLUDING...PLATTSBURGH 638 AM EDT FRI AUG 3 2007 AT 636 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS 6 MILES NORTH OF KEESEVILLE...MOVING NORTHEAST AT 15 MPH. THE THUNDERSTORM WILL BE NEAR SOUTH HERO...5 MILES NORTHWEST OF COLCHESTER POINT BY 700 AM...NEAR SAND BAR STATE PARK...GRAND ISLE BY 710 AM AND NEAR MILTON BY 730 AM. SMALL HAIL AND WIND GUSTS OF 45 MPH OR HIGHER MAY ACCOMPANY THE THUNDERSTORMS. IN ADDITION...THESE STORMS WILL CONTAIN FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWN POURS. TABER
SPECIAL WEATHER STATEMENT...UPDATED NATIONAL WEATHER SERVICE BURLINGTON VT 638 AM EDT FRI AUG 3 2007 NYZ028-VTZ001-002-005-031145- WESTERN CHITTENDEN-EASTERN CLINTON-GRAND ISLE-WESTERN FRANKLIN- INCLUDING...PLATTSBURGH 638 AM EDT FRI AUG 3 2007 AT 636 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS 6 MILES NORTH OF KEESEVILLE...MOVING NORTHEAST AT 15 MPH. THE THUNDERSTORM WILL BE NEAR SOUTH HERO...5 MILES NORTHWEST OF COLCHESTER POINT BY 700 AM...NEAR SAND BAR STATE PARK...GRAND ISLE BY 710 AM AND NEAR MILTON BY 730 AM. THIS STORM HAS A HISTORY OF PRODUCING PEA SIZE HAIL AT PERU AT 640 AM THIS MORNING. SMALL HAIL AND WIND GUSTS OF 45 MPH OR HIGHER MAY ACCOMPANY THE THUNDERSTORMS. IN ADDITION...THESE STORMS WILL CONTAIN FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWN POURS. TABER
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
702 AM EDT FRI AUG 03 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0640 AM HAIL PERU 44.58N 73.53W
08/03/2007 M0.50 INCH CLINTON NY AMATEUR RADIO
&&
ERICESPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 717 AM EDT FRI AUG 3 2007 VTZ002-003-006-016-031215- LAMOILLE-WESTERN FRANKLIN-EASTERN FRANKLIN-ORLEANS- INCLUDING...NEWPORT 717 AM EDT FRI AUG 3 2007 AT 712 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS FROM FRANKLIN TO BAKERSFIELD...MOVING EAST AT 30 MPH. THUNDERSTORMS WILL BE NEAR RICHFORD...MONTGOMERY BY 730 AM...NEAR WESTFIELD...LOWELL BY 740 AM...NEAR JAY...TROY BY 750 AM...NEAR ORLEANS...NORTH TROY BY 800 AM...NEAR NEWPORT AND BROWNINGTON CENTER BY 810 AM. THIS CLUSTER OF THUNDERSTORMS HAS A HISTORY OF PRODUCING HALF INCH DIAMETER HAIL AT PERU NEW YORK EARLY THIS MORNING. SMALL HAIL AND WIND GUSTS OF 45 MPH OR HIGHER MAY ACCOMPANY THE THUNDERSTORMS. IN ADDITION...FREQUENT CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY DOWN POURS WILL BE ASSOCIATED WITH THESE STORMS. TABER
The Burlington radar (KCXX), 42 km away, was scanning. The volume nearest the first event began at 11:28 UTC.
2 thunderstorm wind. Local standard time, as filed.
Several large trees blown down on Witch Cat road.
Several large tree branches down throughout town, as well as loss of power due to strong winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Vermont in 2007Every state in 2007This day in weather historyWarnings in Vermont, August 2007
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: 41156, 41157.