A strong mid-atmospheric disturbance moved across a moderately unstable airmass draped across northern New York during the afternoon of the 27th. Numerous thunderstorms developed in the afternoon, some of which produced severe weather in the form of damaging winds and large hail.
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 strong mid-atmospheric disturbance moved across a moderately unstable airmass draped across northern New York during the afternoon of the 27th. Numerous thunderstorms developed in the afternoon, some of which produced severe weather in the form of damaging winds and large hail.
Damaging winds were reported in Schuyler Falls (Clinton county), Morrisonville (Clinton county) and Owls Head (Franklin county). Nickel size hail was reported in Elizabethtown and Port Kent (Essex county) with golf ball size hail at Owls Head (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 Jul 27, 12:55 PM EST, 45 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BURLINGTON VT 155 PM EDT FRI JUL 27 2007 .SYNOPSIS... A SLOW MOVING LOW PRESSURE SYSTEM IN THE UPPER LEVELS OF THE ATMOSPHERE IS FORECAST TO MOVE OUT OF THE EASTERN GREAT LAKES REGION INTO THE NORTH COUNTRY OVER THE WEEKEND. SCATTERED SHOWERS AND THUNDERSTORMS WILL DEVELOP THIS AFTERNOON...WITH THE BETTER CHANCES FOR RAIN IN NORTHERN NEW YORK. HEADING INTO THE WEEKEND...A WEAK COLD FRONT WILL PUSH INTO THE REGION...AND SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS. SOME STORMS THAT MAY DEVELOP MAY BE SLOW MOVING DURING THIS TIME...WITH LOCALLY HEAVY RAINFALL POSSIBLE. && .NEAR TERM /THROUGH TONIGHT/... UPDATED 1253 PM FRIDAY ISSUED AN UPDATE TO THE ZONES TO ADD ON SEVERE THUNDERSTORM WATCH FOR NORTHERN NEW YORK. && .SHORT TERM /SATURDAY THROUGH MONDAY NIGHT/... UPDATED 345 AM FRIDAY MODELS AND AVBL ENSEMBLES REMAIN IN GOOD AGREEMENT ON OVERALL EVOLUTION OF WX FEATURES TONIGHT INTO SUNDAY...AND ONLY MINOR ADJUSTMENTS NEEDED TO FCST ATTM. BASIC IDEA REMAINS THE SAME WITH UPPER LEVEL LOW WEAKENING AND OPENING INTO AN UPPER TROUGH AS IT APPROACHES AND CROSSES AREA ON SATURDAY...THEN TROUGH RELOADS JUST WEST OF REGION AS SLOW MOVING SFC BNDRY SAGS SOUTHWARD INTO CNTRL/NRN VT/NY AND STALLS INTO SUN/SUN NT. THIS WILL LEAD TO CONTINUED CHCS OF RAFL THROUGH THE PERIOD WITH AT LEAST SOME POTENTIAL FOR SLOW MOVING STORMS/HVY RAFL. FOR THE SPECIFICS...ANY SCT EVENING CONVECTION SHOULD WANE OVERNIGHT ERN FA DUE TO LOSS OF DAYTIME HEATING...WHILE AT LEAST SOME CONTINUATION OF ACTIVITY POSSBL WRN FA OVERNIGHT AS UPPER SYNOPTIC FORCING IS SOMEWHAT STRONGER. PARTLY TO MOSTLY CLOUDY SKIES SHOULD SUFFICE...ALONG W/TYPICAL AREAS OF PATCHY BR/FG IN FAVORED LOCALES...ESP IN AREAS RECEIVING RAFL TODAY. AFTERWARD...UPPER TROUGH AND ASSOC SHORTWAVE THEN PASS ACROSS REGION ON SATURDAY AS WEAK SFC FRONT SINKS SLOWLY SOUTHWARD INTO NRN PORTIONS OF FA. SCT TO NUMEROUS SHOWERS AND STORMS WILL THUS BE THE RULE DURING MUCH OF THE DAYLIGHT HOURS...WITH CONVECTION LINGERING INTO THE EVENING HOURS IF NOT LONGER. THIS FRONT THEN BASICALLY STALLS ACROSS REGION LATER SATURDAY NIGHT INTO SUNDAY AS MID TO UPPER LVL FLOW BECOMES PARALLEL TO BNDRY...AND FLOW SLOW BACKS IN RESPONSE TO DEVELOPING SFC WAVE PUSHING NORTHEAST FROM MID ATLANTIC STATES. LATEST SREF ANALYSIS SUGGEST CONTINUED HIGH POPS THROUGH THESE PERIOD...ESP CENTRAL/SOUTH AND SEE LITTLE REASON TO DISCOUNT THIS TREND...ESP CONSIDERING SFC BNDRY IN VCNTY AND HIGH PWATS BTWN 1.5 AND 2 INCHES ACROSS REGION. WITH MORE ENHANCED CLOUD COVER...DIURNAL TEMP RANGES WILL BE FAIRLY UNIFORM ACROSS THE AREA...WITH HIGHS 75-82 AND LOWS GENERALLY 60 TO 65. PRIMARY CONCERN DURING THESE PERIODS WILL BE POTENTIAL FOR SLOW MOVING STORMS...WHICH MAY LEAD TO LOCALIZED HEAVY RAINFALL AND POOR DRAINAGE/FLASH FLOOD CONCERNS..ESP CENTRAL/SOUTHERN FA (SEE HYDRO DISC BELOW). && .LONG TERM /TUESDAY THROUGH FRIDAY/... THE LONG TERM CHALLENGE CONTS TO BE TIMING OF CLRING LATE MONDAY INTO TUES ASSOCIATED WITH MID/UPPER LVL CIRCULATION AND ASSOCIATED WEAK SFC BOUNDARY LIFTING INTO THE WESTERN ATLANTIC. LATEST RUNS CONT TO SUPPORT A SLOW PROGRESSION OF THIS SYSTEM EAST INTO THE MID ATLANTIC STATES/SNE BY MONDAY...THEREFORE WL TAPER POPS FROM NW TO SE ACRS OUR CWA WITH THE HIGHS ACRS OUR SE SECTIONS ON MONDAY. OTHERWISE...SFC HIGH PRES AND ASSOCIATED MID/UPPER LVL RIDGE FROM NORTHERN PLAINS/SOUTHERN CANADA BUILDS INTO THE NE CONUS FOR MID WEEK. THIS WL PROVIDE CWA WITH DRIER CONDITIONS...BOTH AT THE SURFACE AND ALOFT. EXPECT MAINLY SUNNY SKIES MID WEEK WITH TEMPS AT OR SLIGHTLY ABOVE NORMAL PER LATEST THERMAL PROFILES AND PROGGED 85H TEMPS BTWN 13-15C. OTHERWISE...NEXT MID/UPPER LVL TROF AND ASSOCIATED COLD FRNT APPROACH WESTERN FA BY FRIDAY WITH MORE SHOWERS/THUNDERSTORMS. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... RADAR SHOWS ISOLATED TO SCATTERED CONVECTION DEVELOPING ACROSS THE HIGHER TRRN OF NORTHERN NEW YORK AND THE SLV ATTM. THIS ACTIVITY WL CONT THRU THE AFTN HRS WITH GENERAL MOVEMENT TO THE NE AT 5 TO 10 MPH. WL MENTION VCTS IN BTV/PBG/SLK/MSS TAF SITES THIS AFTN AND WL CONT TO MONITOR CRNT TRENDS FOR POTENTIAL TEMPO GROUPS FOR 3SM TSRA BKN-OVC035-045CB. THIS EVENING ACTIVITY WL QUICKLY DISSIPATE WITH THE LOSS OF DAYTIME HEATING AND WOULD EXPECT FOG/HZ TO ONCE AGAIN DEVELOP. WL MENTION PREVAILING GROUP OF 4-6SM IN HZ/BR AND TEMPO GROUP OF 2-3SM IN HZ/BR AT SLK/MPV. ALSO...SOME LIGHT HZ WITH UNLIMITED CIGS WL BE POSSIBLE AT MSS/BTV/RUT TONIGHT. SATURDAY...MORE SHOWERS/STORMS WL DEVELOP AHEAD OF APPROACHING COLD FRNT AND MODERATE INSTABILITY. WL MENTION VCTS OR BKN WITH CB IN TAFS SITES AFT 15Z ON SATURDAY. BEYOND 18Z SATURDAY...A WEAK COLD FRONT AND SEVERAL DISTURBANCES IN THE WINDS ALOFT APPROACHING THE AREA WILL CREATE MORE NUMEROUS SHRA/TSRA SUNDAY...WITH MVFR CIGS/VIS POSSIBLE IN ANY RAIN. MODELS INDICATING THE FRONT WILL STALL OVER AREA...AND RAIN WILL LINGER INTO MONDAY AS WELL WITH POTENTIAL FOR LIMITED CIGS/VIS IN RAIN. BY TUESDAY CONDITIONS WL IMPROVE WITH GENERAL VFR EXPECTED AS SFC HIGH PRES BUILDS INTO THE FA. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...NONE. NY...NONE. && SYNOPSIS...JMG NEAR TERM...JN SHORT TERM...JMG LONG TERM...TABER AVIATION...TABER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BURLINGTON VT 104 PM EDT FRI JUL 27 2007 NYZ026>031-034-035-087-281100- NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-EASTERN CLINTON- SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-WESTERN CLINTON- WESTERN ESSEX-EASTERN ESSEX-SOUTHWESTERN ST. LAWRENCE- 104 PM EDT FRI JUL 27 2007 ...SEVERE THUNDERSTORM WATCH 555 IN EFFECT UNTIL 8 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN NEW YORK. .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...SATURDAY THROUGH THURSDAY THE POTENTIAL FOR LOCALLY HEAVY RAINFALL WILL CONTINUE INTO SATURDAY AND SUNDAY. SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS ON SATURDAY AND SUNDAY ALONG A SLOW MOVING COLD FRONT. ANY STORMS THAT DEVELOP WILL MOVE SLOWLY...AND PLENTIFUL MOISTURE IN THE ATMOSPHERE WILL CONTRIBUTE TO THE HEAVY RAIN THREAT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL LIKELY BE NEEDED THIS AFTERNOON AND EVENING ACROSS NORTHERN NEW YORK. VTZ001>012-016>019-281100- 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- 104 PM EDT FRI JUL 27 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL VERMONT...NORTHEAST VERMONT...NORTHWEST VERMONT AND SOUTHERN VERMONT. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS CENTRAL AND NORTHERN VERMONT THROUGH THE REST OF THIS AFTERNOON. THE PRIMARY THREAT FROM THESE STORMS WILL BE FREQUENT CLOUD TO GROUND LIGHTNING...WIND GUSTS TO 40 MPH...AND BRIEF HEAVY DOWN POURS. RAINFALL AMOUNTS COULD APPROACH ONE INCH IN THE HEAVIEST STORMS ACROSS THE HIGHER TERRAIN OF NORTHERN AND CENTRAL VERMONT THROUGH EARLY THIS EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE POTENTIAL FOR LOCALLY HEAVY RAINFALL WILL CONTINUE INTO SATURDAY AND SUNDAY. SHOWERS AND THUNDERSTORMS WILL BECOME MORE NUMEROUS ON SATURDAY AND SUNDAY ALONG A SLOW MOVING COLD FRONT. ANY STORMS THAT DEVELOP WILL MOVE SLOWLY...AND PLENTIFUL MOISTURE IN THE ATMOSPHERE WILL CONTRIBUTE TO THE HEAVY RAIN THREAT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ACROSS CENTRAL AND NORTHERN VERMONT THROUGH THE REST OF THIS AFTERNOON.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 1228 PM EDT FRI JUL 27 2007 NYZ026-029-087-271730- NORTHERN ST. LAWRENCE-SOUTHWESTERN ST. LAWRENCE-SOUTHEASTERN ST. LAWRENCE- INCLUDING...CANTON AND POTSDAM 1228 PM EDT FRI JUL 27 2007 AT 1222 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER SOUTH EDWARDS...MOVING NORTHEAST AT 15 MPH. THE THUNDERSTORM WILL BE NEAR RUSSELL BY 100 PM...NEAR PYRITES BY 110 PM...NEAR WEST PIERREPONT BY 120 PM AND NEAR CANTON BY 130 PM. THIS THUNDERSTORM WILL BE CAPABLE OF PRODUCING SMALL HAIL...WIND GUSTS TO 40 MPH...AND FREQUENT CLOUD TO GROUND LIGHTNING. IN ADDITION...RAINFALL AMOUNTS COULD APPROACH ONE INCH IN A SHORT PERIOD OF TIME ACROSS SOUTHERN AND CENTRAL SAINT LAWRENCE COUNTY. TABER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 1258 PM EDT FRI JUL 27 2007 NYZ026>031-034-035-087-272100- NORTHERN ST. LAWRENCE-NORTHERN FRANKLIN-EASTERN CLINTON- SOUTHEASTERN ST. LAWRENCE-SOUTHERN FRANKLIN-WESTERN CLINTON- WESTERN ESSEX-EASTERN ESSEX-SOUTHWESTERN ST. LAWRENCE- INCLUDING THE CITIES OF...MASSENA...MALONE...PLATTSBURGH... STAR LAKE...SARANAC LAKE...TUPPER LAKE...DANNEMORA... LAKE PLACID...PORT HENRY...TICONDEROGA...OGDENSBURG...POTSDAM... GOUVERNEUR 1258 PM EDT FRI JUL 27 2007 ...A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 8 PM THIS EVENING FOR NORTHERN NEW YORK... ISOLATED TO SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS NORTHERN NEW YORK AND THE SAINT LAWRENCE VALLEY THROUGH THE REST OF THIS AFTERNOON. THE BEST CONCENTRATION OF STORMS WILL BE ACROSS CENTRAL SAINT LAWRENCE COUNTY INTO THE HIGHER TERRAIN OF THE NORTHERN ADIRONDACK MOUNTAINS. THE PRIMARY SEVERE WEATHER THREAT WILL BE ISOLATED STRONG AND DAMAGING WIND GUSTS ASSOCIATED WITH THE STRONGEST STORMS. IN ADDITION...FREQUENT CLOUD TO GROUND LIGHTNING...SMALL HAIL...AND BRIEF HEAVY DOWN POURS WILL OCCUR WITH THESE STORMS. RAINFALL AMOUNTS COULD APPROACH 1 TO 2 INCHES IN A SHORT PERIOD OF TIME...WHICH MAY CAUSE SOME MINOR FLOODING OF LOW LYING AND POOR DRAINAGE AREAS. VTZ001>012-016>019-272100- 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- INCLUDING THE CITIES OF...ALBURGH...SOUTH HERO...ST. ALBANS... NEWPORT...ISLAND POND...BURLINGTON...JOHNSON...STOWE... ST. JOHNSBURY...MONTPELIER...MIDDLEBURY...VERGENNES...BRADFORD... RANDOLPH...RUTLAND...SPRINGFIELD...WHITE RIVER JUNCTION... ENOSBURG FALLS...RICHFORD...UNDERHILL...BRISTOL...RIPTON... EAST WALLINGFORD...KILLINGTON 1258 PM EDT FRI JUL 27 2007 ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS CENTRAL AND NORTHERN VERMONT THROUGH THE REST OF THIS AFTERNOON. THE PRIMARY THREAT FROM THESE STORMS WILL BE FREQUENT CLOUD TO GROUND LIGHTNING...WIND GUSTS TO 40 MPH...AND BRIEF HEAVY DOWN POURS. RAINFALL AMOUNTS COULD APPROACH ONE INCH IN THE HEAVIEST STORMS ACROSS THE HIGHER TERRAIN OF NORTHERN AND CENTRAL VERMONT THROUGH EARLY THIS EVENING. PLEASE STAY TUNED TO NOAA WEATHER RADIO...YOUR LOCAL MEDIA...OR GO TO WWW.WEATHER.GOV/BURLINGTON FOR FURTHER UPDATES ON THIS WEATHER SITUATION.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 127 PM EDT FRI JUL 27 2007 NYZ028-035-VTZ001-271830- EASTERN ESSEX-EASTERN CLINTON-GRAND ISLE- INCLUDING...PLATTSBURGH 127 PM EDT FRI JUL 27 2007 AT 120 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 5 MILES EAST OF PORT KENT AND MOVING NORTHEAST AT 5 TO 10 MPH. THE THUNDERSTORM WILL BE NEAR PORT KENT AND 9 MILES SOUTH OF SOUTH HERO BY 230 PM. SMALL HAIL AND WIND GUSTS OF 45 MPH OR HIGHER MAY ACCOMPANY THE THUNDERSTORMS. IN ADDITION...RAINFALL AMOUNTS WILL BE BETWEEN 1 AND 2 INCHES...WHICH WILL FALL IN A VERY SHORT PERIOD OF TIME. THIS COULD CAUSE SOME MINOR LOW LYING AND POOR DRAINAGE FLOODING. TABER
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BURLINGTON VT
222 PM EDT FRI JUL 27 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0140 PM HAIL KEESEVILLE 44.50N 73.48W
07/27/2007 E0.25 INCH CLINTON NY DEPT OF HIGHWAYS
&&
BROOKETSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BURLINGTON VT 233 PM EDT FRI JUL 27 2007 NYZ028-031-034-035-VTZ001-002-271930- EASTERN ESSEX-WESTERN ESSEX-EASTERN CLINTON-WESTERN CLINTON-GRAND ISLE-WESTERN FRANKLIN- INCLUDING...PLATTSBURGH AND WILLSBORO 233 PM EDT FRI JUL 27 2007 AT 230 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NUMEROUS SHOWERS AND THUNDERSTORMS OVER SOUTHERN AND EASTERN CLINTON COUNTY AS WELL AS CENTRAL AND EASTERN ESSEX COUNTY...MOVING NORTHEAST AT 10 TO 15 MPH. THE THUNDERSTORM WILL BE NEAR CUMBERLAND HEAD BY 250 PM...NEAR BEEKMANTOWN BY 300 PM...NEAR POINT AU ROCHE BY 310 PM...NEAR ISLE LA MOTTE...NORTH HERO BY 320 PM...NEAR ALBURGH DUNES STATE PARK AND SOUTH ALBURGH BY 330 PM. THESE CLUSTERS OF STORMS WILL BE CAPABLE OF PRODUCING VERY HEAVY RAINFALL IN A SHORT PERIOD OF TIME...FREQUENT CLOUD TO GROUND LIGHTNING...WIND GUSTS TO 40 MPH...AND SMALL HAIL. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES WILL BE POSSIBLE WITH THE STRONGER STORMS. THIS AMOUNT OF RAIN IN A SHORT PERIOD OF TIME...MAY CAUSE MINOR LOW LYING AND POOR DRAINAGE FLOODING. TABER
The Burlington radar (KCXX), 32 km away, was scanning. The volume nearest the first event began at 18:40 UTC.
3 thunderstorm wind, 3 hail. Local standard time, as filed.
Two to three foot diameter tree, as well as power lines downed by thunderstorm winds.
Nickel size hail reported.
Numerous reports of trees down throughout parts of Clinton county in the vicinity of Morrisonville.
Nickel size hail reported.
Numerous trees down across roads in Owls Head and Mountain View area, which included a tree that fell on a moving vehicle with no injuries reported. Also...golf ball size hail was reported.
Golf ball size hail reported as well as numerous trees downed due to strong winds.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2007Every state in 2007This day in weather historyWarnings in New York, July 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: 52577, 52571, 52580, 52573, 52581, 52575.