A closed upper level low and pool of unusually cold air in the mid and upper levels of the atmosphere moved over the region Tuesday, July 7th, leading to the development of numerous thunderstorms across eastern New York, many of which contained large quantities of hail. The severe thunderstorms developed during the late morning hours, and continued through early evening.
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 ALY wrote it up.
A closed upper level low and pool of unusually cold air in the mid and upper levels of the atmosphere moved over the region Tuesday, July 7th, leading to the development of numerous thunderstorms across eastern New York, many of which contained large quantities of hail. The severe thunderstorms developed during the late morning hours, and continued through early evening.
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 Albany, NY wrote its last area forecast discussion before the first event at Jul 6, 8:41 PM EST, 3 hours 19 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ALBANY NY 941 PM EDT MON JUL 6 2009 .SYNOPSIS... ANOTHER UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE ACROSS THE REGION THROUGH WEDNESDAY...BRINGING MORE UNSETTLED WEATHER AND BELOW NORMAL TEMPERATURES. A BRIEF DRY PERIOD WITH MODERATING TEMPERATURES IS EXPECTED TOWARDS THE END OF THE WORK WEEK. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... SCATTERED SHOWERS STILL ACROSS THE AREA...SOME HEAVIER DOWNPOURS TO THE WEST OF THE AREA...BUT DUE TO THE WEST MEAN FLOW...AND SOME DOWNSLOPE...ALONG WITH A RELATIVELY DRY LOWER ATMOSPHERE... LIMITING INSTABILITY...ANY THUNDER POTENTIAL SHOULD END BEFORE MIDNIGHT. SCATTERED TO ISOLATED COVERAGE SHOULD CONTINUE THOUGH...AND WILL KEEP IT IN THE FORECAST...AS SLIGHT UPPER COOLING TAKES PLACE...AND APPROACHING UPPER DYNAMICS. MOSTLY CLOUDY IN NORTHERN AREAS...TO PARTLY CLOUDY IN MOST OTHER AREAS. SOME OF THE CLOUD COVER WILL PREVENT TEMPERATURES FROM DROPPING AS MUCH AS THEY COULD...BUT CURRENT FORECAST MINIMUM TEMPERATURES IN THE BALL PARK...SO MINOR ADJUSTMENTS TO CLOUD COVER AND TEMPERATURES IF ANY. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/... TUESDAY IS SHAPING UP TO BE A VERY CONVECTIVELY ACTIVE DAY ACROSS THE AREA. SPC HAS PLACED MOST OF THE FORECAST AREA IN A SLIGHT RISK OUTLINE FOR SEVERE THUNDERSTORMS...AND THIS CERTAINLY SEEMS WARRANTED DUE TO THE EXPECTED SET UP. THE CUT-OFF LOW NOW POSITIONED ACROSS THE BORDER OF SOUTHERN ONTARIO/QUEBEC...WILL GRADUALLY DRIFT SOUTHEAST TO A POSITION JUST NORTH OF LAKE ONTARIO BY LATE TOMORROW. LARGE SCALE ASCENT WILL INCREASE ACROSS EASTERN NEW YORK AND WESTERN NEW ENGLAND...AS A STRONG UPPER LEVEL JET MOVES ACROSS OHIO/PA DURING THE DAY. OUR AREA WILL BE IN THE OPTIMAL LEFT FRONT QUAD OF THIS 100+ KT JET FOR DIVERGENCE ALOFT. CONVECTION WILL BE FOCUSED BY A SURFACE OCCLUDED BOUNDARY MOVING THROUGH. SBCAPE FORECAST DIFFICULT DUE TO QUESTIONABLE MOISTURE. NAM12 SHOWING POCKETS OF 2000 J/KG...HOWEVER THAT ASSUMES DEWPOINTS IN THE 60S. MET/MAV GUIDANCE SEEM MORE REALISTIC WITH DEWPOINTS MAINLY IN THE UPPER 50S WHICH WOULD LOWER CAPE TO AROUND 1000-1500. THIS MAY SEEM A BIT LOW FOR A SIGNIFICANT SEVERE THREAT...HOWEVER THERE SHOULD BE ENOUGH DYNAMICS AND DEEP LAYER SHEAR TO OVERCOME SOMEWHAT LOWER MOISTURE. 0-6 KM BULK SHEAR OF 30-50 KT FORECAST...WITH THE GREATEST VALUES ACROSS SOUTHERN PORTIONS OF THE AREA...SO STORM ORGANIZATION IS ALSO LIKELY. GIVEN EXPECTED STEEP 850-500 MB LAPSE RATES OF CLOSE TO 7C/KM AND LOW FREEZING LEVELS...BOTH WIND AND HAIL WILL BE THREATS. UNLIKE LAST WEEKS CUT-OFF LOW EVENT...PWAT VALUES FORECAST TO BE SLIGHTLY BELOW NORMAL...WITH PLENTY OF MID LEVEL FLOW...SO FLASH FLOOD THREAT IS LOW. LEANED TOWARDS SLOWER NAM MODEL WITH REGARDS TO EVOLUTION AND PROGRESSION OF THE LOW...WHICH HAS MORE SUPPORT FROM OTHER MODEL GUIDANCE THAN THE GFS. WITH INCREASING CLOUDS AND CONVECTION AROUND...TEMPS ONLY EXPECTED TO RISE INTO THE MID 70S...WITH MID TO UPPER 60S IN THE MOUNTAINS. THE SEVERE THREAT WILL DIMINISH AS THE UPPER JET PUSHES SOUTH AND EAST AWAY FROM THE AREA...AS THE SURFACE OCCLUDED BOUNDARY MOVES INTO NEW ENGLAND. WILL GRADUALLY DECREASE POPS LATER IN THE EVENING AND OVERNIGHT. ON WED...THE CUT-OFF LOW IS FORECAST TO MOVE DIRECTLY OVER THE AREA. HOWEVER...DEEP LAYER SHEAR DECREASES SIGNIFICANTLY AND MOISTURE WILL STILL BE LACKING. STILL...WITH COLD POCKET ALOFT OF -17C TO -19C AT 500 MB...SHOWERS WITH ISOLATED THUNDER COULD PRODUCE SOME SMALL HAIL. WILL LEAN TOWARDS WETTER NAM GUIDANCE AND MENTION LIKELY POPS FOR MOST OF THE AREA. TEMPS WILL CONTINUE TO BE COOL FOR THIS TIME OF YEAR...WITH LOWER 70S TO POSSIBLY MID 70S SOUTH...AND LOWER TO MID 60S ACROSS THE HIGHER TERRAIN. WILL DECREASE POPS ONCE AGAIN WED NIGHT DUE TO LOSS OF DIURNAL HEATING AND THE UPPER LOW STARTS TO PULL AWAY. ON THUR...THE UPPER LOW IS FORECAST TO EXIT EASTWARD OFF THE NEW ENGLAND COAST...HOWEVER WE WILL STILL BE IN CYCLONIC FLOW. WILL MENTION JUST SLIGHT CHANCE POPS AT THIS TIME. WITH MORE SUNSHINE EXPECTED...TEMPS SHOULD WARM INTO THE MID TO UPPER 70S IN MOST AREAS...BUT STILL ABOUT 5 DEGREES BELOW NORMAL. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... HPC GUIDANCE. HIGH PRESSURE IS IN CONTROL AT THE START OF THIS PERIOD...WITH NO MORE THAN SLGT CHC POPS. THEN A COLD FRONT GAINS MOMENTUM AS IS SLIDES SOUTHEAST ACROSS THE GREAT LAKES. SFC CAPES OVER 2000 J/KG AND LIS -5 TO -7 FROM THE CAPITAL REGION N AND W WILL BREED CONDITIONS FAVORABLE FOR CHC TSRA ON SATURDAY...WITH THE ACTIVITY CONTINUING INTO THE OVERNIGHT. THE SOUTHERN ZONES WILL BE MOST FAVORED ON SUNDAY...BUT ACTIVITY MAY BE OVER WITH BY MID AFTERNOON WHEN THE GFS HAS THE FRONT JUST THROUGH OUR ENTIRE FA. THE ECMWF IS SLIGHTLY SLOWER. GFS GIVES ISOLATED QUARTER TO HALF INCH TOTALS WHEREAS ECMWF FOCUSES ON 0.50 INCH PLUS N AND W OF THE CAPITAL DISTRICT. A BRIEF HIGH PRESSURE RIDGE BEFORE A SFC TROF PROVIDES ANOTHER CHC SHRA AS EARLY AS LATE MONDAY. HIGHS TEMPERATURES SLIGHTLY BELOW NORMAL ON FRIDAY TOP OUT IN THE LOW AND MID 80S SATURDAY EXCEPT FOR THE HIGH PEAKS OF THE MOUNTAIN CHAINS. OVERNIGHT LOWS WILL BE WELL BELOW NORMAL THURSDAY NIGHT... BUT NEAR NORMAL FRIDAY...SATURDAY AND SUNDAY NIGHTS...FALLING OFF SLIGHTLY MONDAY NIGHT BEHIND THE TROF. THE MEX ESSENTIALLY IGNORES SUNDAYS WARM-UP...BUT OTHERWISE HANDLES TRENDS OKAY. IT HAS SLIGHTLY MILDER LOW TEMPS OVERALL. && .AVIATION /02Z TUESDAY THROUGH SATURDAY/... SHOWERS WIRE DIMINISHING NORTH OF THE AIRPORTS THIS EVENING...BUT INCLUDED VCSH GROUP AT GFL FOR THE FIRST 6 HOURS JUST IN CASE. TS SHOULD NOT BE A CONCERN. GFL SHOULD REACH CROSSOVER TEMP FOR FOG TONIGHT...JUST AS IN PREVIOUS 2 NIGHTS...BUT HAVE THEM STAYING MVFR. OCCASIONAL MVFR FOG IS POSSIBLE AT ALB...IF NOWHERE ELSE SURROUNDING IT. CROSSOVER TEMP IS CLOSE BOTH THERE AND AT POU...WHERE HIGH-END MVFR FOG POSSIBLE. IF CLOUDS FILL IN AS MAV SUGGESTS...LESS FOG. LIS LOW ENOUGH FOR THUNDERSTORM ACTIVITY ON TUESDAY...BUT SOMEWHAT OF A LACK OF HIGH CAPES SUGGESTS PERHAPS A WIDELY SCATTERED EVENT. THUS ATTM HAVE GONE WITH JUST CB INCLUSION AT THE AIRPORTS TUE AFTN. OUTLOOK... TUE NGT-WED...AM IFR FOG POSSIBLE...OTHERWISE VFR...WITH AFTERNOON/EVENING MVFR SHRA/TSRA LIKELY. THU-FRI...VFR...XCP AM MVFR FOG POSSIBLE...NO SIG WX. SAT...MAINLY VFR WITH GOOD CHC SHRA/TSRA. && .FIRE WEATHER... ANOTHER UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE ACROSS THE REGION THROUGH WEDNESDAY...BRINGING MORE UNSETTLED WEATHER. MAINLY SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH TONIGHT...HOWEVER MORE WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED TUESDAY AFTERNOON AND EVENING. WHILE THE TORRENTIAL RAINS WE SAW LAST WEEK ARE NOT EXPECTED...SOME BRIEF HEAVY DOWNPOURS WILL OCCUR. RELATIVE HUMIDITY VALUES WILL RISE TO NEAR 100 PERCENT TONIGHT...THEN DROP TO BETWEEN 50 AND 70 PERCENT ON TUESDAY. RH VALUES WILL INCREASE TO AROUND 100 PERCENT AGAIN TUESDAY NIGHT. WINDS WILL BE LIGHT AND VARIABLE TONIGHT...THEN SHIFT TO THE SOUTHWEST AND INCREASE TO AROUND 5 TO 10 MPH ON TUESDAY. WINDS TUESDAY NIGHT WILL BE WEST AROUND 5 MPH OR LESS. && .HYDROLOGY... ALTHOUGH ANOTHER UPPER LEVEL LOW WILL PLAGUE THE REGION INTO MID WEEK...FLASH FLOOD POTENTIAL LOOKS CONSIDERABLY LOWER THAN LAST WEEK. PRECIPITABLE WATERS THIS MORNING OFF ALY SOUNDING WERE ONE STANDARD DEVIATION BELOW NORMAL. MODELS INDICATE THAT THROUGH THE MIDDLE OF THE WEEK...PWS WILL HOLD AT OR BELOW NORMAL. LAST WEEK PWS EXCEED ONE STANDARD DEVIATION ABOVE NORMAL. BEST CHANCE FOR HEAVY RAINFALL LOOKS TO BE TUESDAY AS BETTER DYNAMICS AND HIGHER DEW POINTS SUGGEST STRONGER TSRA/S IN THE AREA. WHILE ANY ONE STORM CAN DUMP OUT ENOUGH RAIN TO PRODUCE NUISANCE FLOODING...OVERALL THREAT IS AGAIN LOWER THAN LAST WEEK. AS FOR RIVER FLOOD POTENTIAL...DO NOT EXPECT MUCH IN THE WAY OF ANY SIGNIFICANT RESPONSE AS RIVERS HAVE HAD A CHANCE TO RECEDE FOLLOWING LAST WEEK/S HEAVY PRECIP. && .ALY WATCHES/WARNINGS/ADVISORIES... CT...NONE. NY...NONE. MA...NONE. VT...NONE. && SYNOPSIS...NAS NEAR TERM...NAS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ALBANY NY 422 PM EDT MON JUL 6 2009 CTZ001-013-MAZ001-025-NYZ032-033-038>043-047>054-058>061-063>066- 082>084-VTZ013>015-071100- NORTHERN LITCHFIELD-SOUTHERN LITCHFIELD-NORTHERN BERKSHIRE- SOUTHERN BERKSHIRE-NORTHERN HERKIMER-HAMILTON-SOUTHERN HERKIMER- SOUTHERN FULTON-MONTGOMERY-NORTHERN SARATOGA-NORTHERN WARREN- NORTHERN WASHINGTON-SCHOHARIE-WESTERN SCHENECTADY- EASTERN SCHENECTADY-SOUTHERN SARATOGA-WESTERN ALBANY-EASTERN ALBANY- WESTERN RENSSELAER-EASTERN RENSSELAER-WESTERN GREENE-EASTERN GREENE- WESTERN COLUMBIA-EASTERN COLUMBIA-WESTERN ULSTER-EASTERN ULSTER- WESTERN DUTCHESS-EASTERN DUTCHESS-NORTHERN FULTON-SOUTHEAST WARREN- SOUTHERN WASHINGTON-BENNINGTON-WESTERN WINDHAM-EASTERN WINDHAM- 422 PM EDT MON JUL 6 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWESTERN CONNECTICUT...WESTERN MASSACHUSETTS...EAST CENTRAL NEW YORK AND SOUTHERN VERMONT. .DAY ONE...TONIGHT. THERE IS A CHANCE OF NON SEVERE THUNDERSTORMS INTO THIS EVENING ASSOCIATED WITH AN UPPER LEVEL DISTURBANCE. ISOLATED STORMS MAY PRODUCE SMALL AND AND WIND GUSTS UP TO 45 MPH. INDIVIDUAL THUNDERSTORMS WILL MOVE FROM WEST TO EAST AROUND 20 TO 25 MPH. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TUESDAY AFTERNOON AND EARLY EVENING. THE MAIN THREATS WILL BE DAMAGING WIND GUSTS EXCEEDING 58 MPH AND LARGE HAIL THREE QUARTERS OF AN INCH IN DIAMETER OR GREATER. THE THUNDERSTORMS WILL BE ASSOCIATED WITH A STRONG DISTURBANCE MOVING ACROSS THE AREA. THERE IS ALSO A CHANCE OF THUNDERSTORMS SATURDAY AND SUNDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 1113 PM EDT MON JUL 6 2009 MAZ001-NYZ054-061-070415- EASTERN COLUMBIA NY-EASTERN RENSSELAER NY-NORTHERN BERKSHIRE MA- 1113 PM EDT MON JUL 6 2009 ...A STRONG THUNDERSTORM IN COLUMBIA...RENSSELAER AND BERKSHIRE COUNTIES... AT 1111 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING...AROUND HALF INCH HAIL...FREQUENT LIGHTNING. THIS STORM WAS LOCATED NEAR STEPHENTOWN...OR ABOUT 8 MILES EAST OF NASSAU...AND MOVING EAST AT 15 MPH. THE THUNDERSTORM WILL BE NEAR... NEW LEBANON BY 1120 PM EDT HANCOCK BY 1140 PM EDT NEW ASHFORD BY MIDNIGHT EDT CHESHIRE BY 1210 AM EDT ADAMS...6 MILES WEST OF SAVOY AND 8 MILES SOUTH OF NORTH ADAMS BY 1215 AM EDT BGM
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 1125 PM EDT MON JUL 6 2009 NYZ047-070430- SCHOHARIE NY- 1125 PM EDT MON JUL 6 2009 ...A STRONG THUNDERSTORM IN SCHOHARIE COUNTY... AT 1124 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING...AROUND HALF INCH HAIL...WINDS AROUND 50 MPH...FREQUENT LIGHTNING...AND HEAVY RAIN. THIS STORM WAS LOCATED NEAR JEFFERSON...OR ABOUT 10 MILES NORTH OF ROXBURY...AND MOVING EAST AT 30 MPH. THE THUNDERSTORM WILL BE NEAR... NORTH BLENHEIM AND GILBOA BY 1135 PM EDT BREAKABEEN BY 1140 PM EDT LIVINGSTONVILLE AND 7 MILES SOUTH OF MIDDLEBURGH BY 1155 PM EDT BGM
The Albany radar (KENX), 13 km away, was scanning. The volume nearest the first event began at 05:02 UTC.
10 hail, 1 lightning, 1 thunderstorm wind. Local standard time, as filed.
Lightning struck a house at 126 Main Street in Altamont late Tuesday afternoon afternoon starting a fire.
Penny size hail was reported in South Cario during a thunderstorm.
Several trees were downed onto wires in Mohawk due to strong thunderstorm winds.
Penny size hail was reported in St. Johnsville during a thunderstorm.
Quarter to ping pong ball size hail was reported in St. Johnsville during a thunderstorm.
Nickel size hail was reported approximately 1 mile south of Turnwood during a thunderstorm.
Ping pong ball size hail was reported approximately 1 mile south of Young Corners during a thunderstorm.
Nickel size hail was reported in Duanesburg during a thunderstorm.
Penny size hail was reported in New Salem during a thunderstorm.
Penny size hail was reported in Albany during a thunderstorm.
Quarter size hail was reported in Whitehall during a thunderstorm.
Penny size hail was reported in Whitehall during a thunderstorm.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in New York in 2009Every state in 2009This day in weather historyWarnings in New York, July 2009
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: 172685, 172668, 172669, 172670, 172671, 172674, 172673, 172672, 172681, 172684, 172676, 172677.