An unstable airmass remained in place across the area Wednesday, July 1st. A strong upper level low over the Great Lakes Region with disturbances rotating about it triggered numerous thunderstorms across eastern New York during the afternoon and early evening hours, some of which became severe.
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.
An unstable airmass remained in place across the area Wednesday, July 1st. A strong upper level low over the Great Lakes Region with disturbances rotating about it triggered numerous thunderstorms across eastern New York during the afternoon and early evening hours, some of which became severe.
In addition, some thunderstorms produced torrential downpours leading to flash flooding, especially in areas that received heavy rainfall on June 30th.
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 1, 1:45 PM EST, 2 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ALBANY NY
245 PM EDT WED JUL 1 2009
.SYNOPSIS...
A STRONG UPPER LEVEL LOW NEAR THE EASTERN GREAT LAKES
REGION WILL KEEP THE WEATHER UNSETTLED TODAY THROUGH FRIDAY. THIS
SLOW MOVING CUTOFF LOW WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER
THE NEXT FEW DAYS...AS DISTURBANCES ROTATE AROUND THE UPPER LOW.
THE SHOWERS AND THUNDERSTORMS TODAY THROUGH TONIGHT WILL PRODUCE
VERY HEAVY RAINFALL ACROSS PORTIONS OF THE FORECAST AREA.
&&
.NEAR TERM /THROUGH THURSDAY NIGHT/...
THE FOG/STRATUS WHICH COVERED THE REGION TOOK ITS TIME BURNING
OFF IN THE HUDSON VALLEY...BUT NOW THAT IT HAS DONE SO THE SUN
WAS DECREASING STABILITY AND CONVECTION WAS FIRING UP ACROSS THE
REGION WEST OF THE HUDSON RIVER. AT THE SAME TIME A VERY ACTIVE
AREA OF CONVECTION WAS OVER NEW ENGLAND MOVING NORTH. DID SOME
MINOR ADJUSTMENTS FOR OUR HIGH TEMPERATURES BASED ON LATEST
OBS. HAVE ONLY MADE MINOR ADJUSTMENTS TO POPS FROM THE PREVIOUS
FORECAST. HAVE GONE WITH CATEGORICAL POPS FOR THIS AFTERNOON...
LIKELY FOR THIS EVENING AND OVERNIGHT INTO THURSDAY MORNING AND
THEN CATEGORICAL FOR THURSDAY AFTERNOON. THE STORM PREDICTION
CENTER HAS SOUTHEASTERN NEW YORK IN THE SLIGHT RISK AREA FOR
BOTH TODAY AND THURSDAY. HAVE KEPT ENHANCED WORDING FOR HEAVY
RAIN...GUSTY WINDS...AND SMALL HAIL THROUGH EARLY THURSDAY
EVENING. BOTH THE GFS AND NAM HAVE CAPES 1000 TO 2000 J/KG
THIS AFTERNOON AND THURSDAY AFTERNOON. PWAT VALUES FROM THE
12Z SOUNDINGS WERE 1.0 TO 1.4 INCHES. STEERING WINDS WERE
AROUND 30 KTS FROM THE SOUTH...WHICH WILL RESULT IN WIDESPREAD
TRAINING OF CELLS. THIS PATTERN IS EXPECTED TO PERSIST THROUGH
THURSDAY...THUS WE HAVE EXTENDED THE FLASH FLOOD WATCH UNTIL
02Z FRIDAY OR 10PM THURSDAY. BY THEN WE EXPECT MOST OF THE
HEAVY CONVECTION TO DIMINISH SOMEWHAT. LIFTED INDEXES MINUS
MINUS 2 TO MINUS 6 BOTH THIS AFTERNOON AND AGAIN THURSDAY
AFTERNOON. FOR THE LOW TONIGHT AND THURSDAY NIGHT...AND THE
HIGH THURSDAY...HAVE GONE WITH A BLEND OF THE MET/MOS AND
THE MAV/MOS GUIDANCE...AND PRIMARILY USED THE NAM-12 FOR THE
WINDS...WITH SOME ENHANCEMENT FOR WIND GUSTS DURING THE AFTER
NOON HOURS.
THE CUTOFF LOW AT 500 HPA IS FORECAST TO MOVE VERY LITTLE DURING
THIS PERIOD...WITH IMPULSES ROTATING AROUND IT.
&&
.SHORT TERM /FRIDAY THROUGH MONDAY/...LOW PRESSURE WILL CONTINUE TO
BE ANCHORED ACROSS THE NORTHEAST ON FRIDAY. THIS WILL KEEP THE
WEATHER UNSETTLED FOR FRIDAY THROUGH EARLY SATURDAY AM. WILL KEEP
THE THREAT OF SHOWERS AND THUNDERSTORMS IN THE FORECAST ON FRIDAY. ON
SATURDAY...THE LOW PRESSURE SYSTEM WILL MOVE EASTWARD AND IT LOOKS
LIKE THE PRECIP SHOULD PHASE OUT FOR LATE SATURDAY AND THE LATTER
HALF OF THE WEEKEND. HAVE LEANED TOWARDS THE GFS SOLUTION FOR THE
FRIDAY THROUGH MONDAY PERIOD. BY SUNDAY AND MONDAY...WILL DROP
POPS TO SLIGHT CHANCE AT MOST AS THE GFS MOVES THE LOW PRESSURE
SYSTEM OFF THE EAST COAST. &&
.LONG TERM /MONDAY THROUGH WEDNESDAY/...
WITH THE ONGOING CONVECTION HAVE OPTED TO POPULATE THE EXTENDED
GRIDS WITH HPC GUIDANCE WITH ONLY A FEW CHANGES MOSTLY TO BLEND
BETTER WITH ADJOINING WFOS. FRONTAL SYSTEM STALLS OVER THE DEEP
SOUTH WITH A WEAK HIGH MOVING IN FROM THE WEST. A WEAK IMPULSE
DROPS SOUTH OUT OF CANADA TUESDAY NIGHT AND A WEAK LOW
DEVELOPS JUST NORTH OF THE BORDER EARLY WEDNESDAY. HAVE MOSTLY
GONE WITH SLIGHT CHANCE OR LOW CHANCE POPS.
&&
.AVIATION /17Z WEDNESDAY THROUGH SUNDAY/...
THE FOG WILL GRADUALLY LIFT BTWN 12Z AND 13Z WITH MVFR CONDITIONS
GIVING WAY TO VFR CONDITIONS BY 16Z. THE VFR CONDITIONS WILL BE
SHORT LIVED AS ANY BREAKS IN THE CLOUD COVER WILL ALLOW HEATING OF
THE VERY UNSTABLE AIR ASSOCIATED WITH THE UPPER LOW WHICH WILL
PRODUCE MORE SHOWERS AND THUNDERSTORMS AFTER 18Z. HAVE PLACED A CB
CLOUD GROUP IN THE TAFS STARTING AT 16Z. FOR TONIGHT EXPECT DENSE
FOG TO DEVELOP AGAIN MAINLY DURING THE LATE EVENING HOURS. WHILE
NOT CERTAIN HOW LONG THE SHOWERS AND THUNDERSTORMS WILL LINGER
THIS EVENING...HAVE PLACED A VCSH IN THE TAFS FROM LATE EVENING ON
AS WELL.
OUTLOOK...
THU-SUN...VFR/MVFR...SCATTERED TO NUMEROUS MAINLY AFTN SHRA/TSRA
AND SOME EARLY MORNING BR/FG.
&&
.FIRE WEATHER...
A SLOW MOVING UPPER LOW WILL KEEP THE THREAT OF SHOWERS AND
THUNDERSTORMS ACROSS THE REGION THE NEXT FEW DAYS. THE SHOWERS AND
THUNDERSTORMS WILL TEND TO BE MORE NUMEROUS DURING THE AFTERNOON AND
EARLY EVENING HOURS.
EXPECT THE RH VALUES TO REMAIN RELATIVELY HIGH IN THE MOIST AIR
MASS TODAY WITH MINIMUM VALUES OF 65 TO 80 PERCENT. RH VALUES WILL
RECOVER TO NEAR 100 PERCENT TOMORROW NIGHT...FALL BACK TO 70 TO 90
PERCENT THURSDAY...THEN INCREASE TO AROUND 100 PERCENT THURSDAY
NIGHT. FOG DRIP AND/OR DEW WILL BE LIKELY DURING THE EARLY MORNING
HOURS.
THE WINDS WILL BE FROM THE SOUTH OR SOUTHEAST TODAY AT AROUND 10
MPH...THEN DIMINISH TONIGHT...THEN TURN SOUTH/SOUTHWEST AT 5 TO 15
MPH ON THURSDAY.
&&
.HYDROLOGY...
A FLASH FLOOD WATCH WAS ISSUED FOR THE ENTIRE FORECAST AREA
UNTIL 10 PM THURSDAY BASED ON WET ANTECEDENT CONDITIONS FROM
YESTERDAYS CONVECTION...HIGH CAPE VALUES...HIGH PWATS...AND
THE POSSIBILITY OF TRAINING SHOWERS AND THUNDERSTORMS ONCE
AGAIN TODAY THROUGH THURSDAY EVENING.
MANY LOCATIONS BASED ON GROUND TRUTH AND THE STORM TOTAL
PRECIPITATION PRODUCT HAD 1-2 INCHES OF RAINFALL...WITH SOME
LOCATIONS GETTING OVER 3 INCHES FROM THE HUDSON RIVER VALLEY...
THE LAKE GEORGE REGION EAST NORTHEAST INTO SOUTHERN VERMONT.
ANOTHER PCPN MAXIMUM OF 1-3 INCHES OCCURRED IN THE CENTRAL
MOHAWK VALLEY. SHOWERS AND THUNDERSTORM WILL TEND TO MOVE S/SW TO
THE N/NE TODAY...WITH PRECIPITABLE WATER VALUES IN THE 1-1.5 RANGE
DOWNPOURS OF AN INCH OR SO IN LESS THAN AN HOUR MAY OCCUR. THE
THREAT OF TRAINING THUNDERSTORMS...AND OROGRAPHIC ENHANCEMENT OVER
THE HIGHER TERRAIN IN THE S/SW FLOW WILL ALSO INCREASE THE POTENTIAL
FLASH FLOOD THREAT. THE 1-HR ZONE FFG VALUES ARE BETWEEN 1 AND 2.5
INCHES ACROSS THE HSA. WE ARE EXPECTING AN ADDITIONAL 1-2 INCHES OF
RAINFALL WITH LOCALLY HIGHER AMOUNTS IN EXCESS OF 3 INCHES BY
SUNRISE THURSDAY AND THE POTENTIAL DOES EXIST FOR SOME FLASH
FLOODING.
ANOTHER BOUT OF RAINFALL WILL BE POSSIBLE THU WITH ANOTHER UPPER
LEVEL IMPULSE...AND SFC WAVE ROTATING AROUND THE UPPER LOW. THIS
COULD BRING AN ADDITIONAL INCH OR SO OF RAINFALL...SO WE HAVE
EXTENDED THE WATCH.
MAIN STEM RIVERS HAVE NOT BEEN AFFECTED THAT MUCH SO FAR SINCE
THE HEAVY RAINS HAVE BEEN OVER RELATIVELY SMALL AREAS. HOWEVER
HEAVY RAINFALL OVER A PARTICULAR RIVER BASIN COULD BRING THAT
RIVER TO NEAR OR OVER FLOOD.
FOR DETAILS ON SPECIFIC AREA RIVERS AND LAKES...INCLUDING OBSERVED
AND FORECAST RIVER STAGES AND LAKE ELEVATIONS...PLEASE VISIT THE
ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/ GRAPHS ON OUR WEBSITE.
&&
.ALY WATCHES/WARNINGS/ADVISORIES...
CT...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR CTZ001-013.
NY...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR NYZ032-033-038>043-
047>054-058>061-063>066-082>084.
MA...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR MAZ001-025.
VT...FLASH FLOOD WATCH THROUGH LATE TONIGHT FOR VTZ013>015.
&&
SYNOPSIS...RCK
NEAR TERM...RCK
SHORT TERM...KOLECI
LONG TERM...RCK
AVIATION...RCK
FIRE WEATHER...VTK
HYDROLOGY...RCKHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ALBANY NY 512 AM EDT WED JUL 1 2009 CTZ001-013-MAZ001-025-NYZ047>054-058>061-063>066-021100- NORTHERN LITCHFIELD-SOUTHERN LITCHFIELD-NORTHERN BERKSHIRE- SOUTHERN BERKSHIRE-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- 512 AM EDT WED JUL 1 2009 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHWESTERN CONNECTICUT...WESTERN MASSACHUSETTS AND EAST CENTRAL NEW YORK INCLUDING THE EASTERN CATSKILLS...MID HUDSON VALLEY...TACONICS...SCHOHARIE VALLEY...AND THE GREATER CAPITAL REGION. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. THE POTENTIAL SEVERE THUNDERSTORMS WILL FORM AHEAD OF A STRONG UPPER LEVEL DISTURBANCE...AND AN OCCLUDED FRONT. A FEW OF THE THUNDERSTORMS MAY BECOME SEVERE WITH LARGE HAIL GREATER THAN OR EQUAL TO THREE QUARTERS OF AN INCH IN DIAMETER...AND OR DAMAGING WINDS 58 MPH OR GREATER. ANY THUNDERSTORMS WILL ALSO CONTAIN VERY HEAVY RAINFALL. THE THUNDERSTORMS WILL MOVE SOUTHWEST TO NORTHEAST AT AROUND 25 MPH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THERE IS A CHANCE OF NON SEVERE THUNDERSTORMS WITH VERY HEAVY RAINFALL ON THURSDAY. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON INTO THIS EVENING IN THE FOLLOWING COUNTIES... IN CONNECTICUT... LITCHFIELD. IN MASSACHUSETTS... BERKSHIRE. IN NEW YORK... ALBANY...COLUMBIA...DUTCHESS...GREENE...RENSSELAER...SARATOGA...SCHENECTADY... SCHOHARIE...AND ULSTER. SKYWARN SPOTTERS ARE REQUESTED TO SEND REPORTS OF BANK FULL OR NEAR BANK FULL BODIES OF WATER...PONDING OF WATER ON ROADWAYS...AS WELL AS OTHER OCCURRENCES OF FLASH FLOODING...AND RAINFALL REPORTS OF 2 INCHES OR MORE TO THE NATIONAL WEATHER SERVICE BY TELEPHONE OR THE SEVERE WEATHER REPORT FORM ON THE INTERNET. NYZ032-033-038>043-082>084-VTZ013>015-020915- NORTHERN HERKIMER-HAMILTON-SOUTHERN HERKIMER-SOUTHERN FULTON- MONTGOMERY-NORTHERN SARATOGA-NORTHERN WARREN-NORTHERN WASHINGTON- NORTHERN FULTON-SOUTHEAST WARREN-SOUTHERN WASHINGTON-BENNINGTON- WESTERN WINDHAM-EASTERN WINDHAM- 512 AM EDT WED JUL 1 2009 ...FLASH FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL NEW YORK INCLUDING THE SOUTHERN ADIRONDACK REGION...WESTERN AND CENTRAL MOHAWK VALLEY...AND THE LAKE GEORGE REGION...AS WELL AS SOUTHERN VERMONT. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLASH FLOOD WATCH. NON SEVERE THUNDERSTORMS ARE LIKELY TODAY AHEAD OF AN UPPER LEVEL DISTURBANCE...AND AN OCCLUDED FRONT. VERY HEAVY RAINFALL IS LIKELY WITH ANY THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THERE IS A CHANCE OF NON SEVERE THUNDERSTORMS ON THURSDAY. LOCALLY HEAVY RAINFALL IS POSSIBLE. .SPOTTER INFORMATION STATEMENT... SKYWARN SPOTTERS ARE REQUESTED TO SEND REPORTS OF BANK FULL OR NEAR BANK FULL BODIES OF WATER...PONDING OF WATER ON ROADWAYS...AS WELL AS OTHER OCCURRENCES OF FLASH FLOODING...AND RAINFALL REPORTS OF 2 INCHES OR MORE TO THE NATIONAL WEATHER SERVICE BY TELEPHONE OR THE SEVERE WEATHER REPORT FORM ON THE INTERNET. TAW/11
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 137 PM EDT WED JUL 1 2009 CTZ001-013-011830- NORTHERN LITCHFIELD CT-SOUTHERN LITCHFIELD CT- 137 PM EDT WED JUL 1 2009 ...A STRONG THUNDERSTORM MOVING INTO SOUTHERN LITCHFIELD COUNTY... AT 135 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING...SMALL HAIL...WINDS AROUND 40 MPH...FREQUENT LIGHTNING...AND HEAVY RAIN. THIS STORM WAS LOCATED 12 MILES SOUTH OF NEW MILFORD...OR ABOUT OVER DANBURY...AND MOVING NORTHEAST AT 25 MPH. THE THUNDERSTORM WILL BE NEAR... NEW MILFORD BY 205 PM EDT 9 MILES SOUTHEAST OF GAYLORDSVILLE BY 210 PM EDT 7 MILES NORTHWEST OF WOODBURY CENTER BY 215 PM EDT NEW PRESTON BY 225 PM EDT 6 MILES SOUTHWEST OF LITCHFIELD BY 230 PM EDT ONE HALF TO ONE INCH OF RAIN COULD FALL IN A SHORT AMOUNT OF TIME. THIS COULD CAUSE PONDING OF WATER ON ROADS AN POOR DRAINAGE LOCATIONS. JPV
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 154 PM EDT WED JUL 1 2009 NYZ040-047>050-011845- SCHOHARIE NY-WESTERN SCHENECTADY NY-EASTERN SCHENECTADY NY- SOUTHERN SARATOGA NY-MONTGOMERY NY- 154 PM EDT WED JUL 1 2009 ...A STRONG THUNDERSTORM IN NORTHEAST SCHOHARIE...EXTREME EASTERN MONTGOMERY...WESTERN SCHENECTADY AND WESTERN SARATOGA COUNTIES... AT 152 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING...AROUND HALF INCH HAIL...WINDS AROUND 45 MPH...FREQUENT LIGHTNING...AND HEAVY RAIN. THIS STORM WAS LOCATED NEAR DELANSON...OR ABOUT 11 MILES WEST OF ROTTERDAM...AND MOVING NORTH AT 15 MPH. THE THUNDERSTORM WILL BE NEAR... ROTTERDAM JUNCTION BY 225 PM EDT AMSTERDAM BY 235 PM EDT GLENVILLE BY 240 PM EDT ONE HALF TO ONE INCH OF RAIN COULD FALL IN A SHORT AMOUNT OF TIME. THIS COULD CAUSE PONDING OF WATER ON ROADS AN POOR DRAINAGE LOCATIONS. JPV
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 230 PM EDT WED JUL 1 2009 CTZ001-013-011915- NORTHERN LITCHFIELD CT-SOUTHERN LITCHFIELD CT- 230 PM EDT WED JUL 1 2009 ...STRONG THUNDERSTORMS IN LITCHFIELD COUNTY... AT 229 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS CAPABLE OF PRODUCING...AROUND HALF INCH HAIL... WINDS AROUND 50 MPH...FREQUENT LIGHTNING...AND HEAVY RAIN. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM THOMASTON TO LITCHFIELD TO GAYLORDSVILLE...OR ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF BRISTOL TO 10 MILES SOUTHWEST OF TORRINGTON TO 7 MILES NORTHWEST OF NEW MILFORD...AND MOVING NORTHEAST AT 15 MPH. THUNDERSTORMS WILL BE NEAR... KENT BY 240 PM EDT TORRINGTON BY 300 PM EDT NEW HARTFORD...WINSTED...CORNWALL BRIDGE AND CORNWALL BRIDGE POTTERY BY 315 PM EDT JPV/NAS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 232 PM EDT WED JUL 1 2009 NYZ041-084-011915- NORTHERN SARATOGA NY-SOUTHERN WASHINGTON NY- 232 PM EDT WED JUL 1 2009 ...A STRONG THUNDERSTORM IN SARATOGA AND WASHINGTON COUNTIES... AT 231 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM CAPABLE OF PRODUCING...AROUND HALF INCH HAIL...FREQUENT LIGHTNING...AND HEAVY RAIN. THIS STORM WAS LOCATED NEAR GREENWICH... OR ABOUT 11 MILES EAST OF SARATOGA SPRINGS...AND MOVING NORTH AT 5 MPH. THE THUNDERSTORM WILL BE NEAR... 6 MILES SOUTH OF FORT EDWARD BY 315 PM EDT JPV/NAS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ALBANY NY 240 PM EDT WED JUL 1 2009 NYZ048>050-011930- WESTERN SCHENECTADY NY-EASTERN SCHENECTADY NY-SOUTHERN SARATOGA NY- 240 PM EDT WED JUL 1 2009 ...A STRONG THUNDERSTORM IN SCHENECTADY AND SARATOGA COUNTIES... AT 239 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 ROTTERDAM JUNCTION...OR ABOUT OVER SCOTIA...AND MOVING NORTHEAST AT 15 MPH. THE THUNDERSTORM WILL BE NEAR... GLENVILLE BY 245 PM EDT EAST GLENVILLE AND ALPLAUS BY 250 PM EDT BURNT HILLS BY 305 PM EDT 8 MILES SOUTHEAST OF GALWAY BY 310 PM EDT JPV/NAS
The Albany radar (KENX), 33 km away, was scanning. The volume nearest the first event began at 18:47 UTC.
11 flash flood, 10 hail, 3 thunderstorm wind. Local standard time, as filed.
Quarter size hail was reported in East Glenville during a thunderstorm.
Quarter size hail was reported in Glenville during a thunderstorm.
Trees were reported down in Glenville due to strong thunderstorm winds.
Nickel size hail was reported in East Glenville during a thunderstorm.
Penny size hail was reported in Ballston Lake during a thunderstorm.
Quarter size hail was reported in Charlton during a thunderstorm. The hail measured 1.13 inches in diameter.
Nickel size hail was reported in Burnt Hills during a thunderstorm.
Numerous trees were reported down in Glenville along Glenridge Road due to strong thunderstorm winds.
Three to 4 feet of ponding water was reported on Glenville Road in Glenville due to very heavy rainfall.
Duanesburg Churches Road in Duanesburg and Turnbull Road in Delanson were closed due to flash flooding from very heavy rainfall.
Nickel size hail was reported in Copake during a thunderstorm.
Ping pong ball size hail was reported in Snake Hill, near Saratoga Lake, during a thunderstorm.
The intersection of Sand Creek Road and Everett Road was closed due to flash flooding from heavy rainfall.
Several roads were closed due to flash flooding from very heavy rainfall in Schenectady including portions of Weaver Street, Jay Street, Union Street and Broadway. Vehicles were stuck in the flood waters. At least one person had to be rescued after getting trapped on the roof of her minivan under the Weaver Street bridge.
A measured wind gust of 58 mph was reported in Cohoes.
Penny size hail was reported approximately 5 miles west of Cohoes during a thunderstorm.
Nickel size hail was reported in Roessleville during a thunderstorm.
Several roads were closed in North Troy due to flash flooding from very heavy rainfall with several vehicles stuck in the flood waters.
Intense rainfall from slow moving and training thunderstorms produced flash flooding in Cohoes.
Numerous roadways, including Meadowlark Drive, were reportedly impassable due to several feet of ponding water. Several vehicles were also reportedly stuck in the flood waters, with at least one person rescued from a submerged car by being pulled out of the back seat of the vehicle through the trunk of the car.
In addition, a roof of a home collapsed on Idlewild Park in Watervliet due to the intense rainfall, with no injuries reported.
Central Avenue in Colonie was closed due to flash flooding underneath the Interstate 90 overpass.
A portion of Route 2, Troy Schenectady Road in Latham was closed due to flash flooding from intense rainfall. A nearby business was also flooded.
Numerous roads were closed in and around Easton due to flash flooding from very heavy rainfall. The Cheese Factory Road was closed with a 7 foot deep trough through the road. Other roads closed to due flash flooding included County Route 113, Old Schuylerville Road and Meeting House Road.
Fonda Road in Waterford was washed out due to flash flooding from very heavy rainfall. Some residents were evacuated from their homes.
In addition, Durham Road in Stillwater was washed out due to flash flooding from very heavy rainfall. Route 4 was also closed due to flooding, with no through traffic.
The Route 67 Bridge on the Rensselaer County side of the Hudson River was closed due to flash flooding due to heavy rainfall.
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: 173283, 173287, 173289, 173291, 173301, 173296, 173292, 173290, 173369, 173371, 173298, 173303, 188716, 173378, 173348, 173279, 173275, 173375, 173377, 188714, 188715, 173401, 173405, 188713.