A slow moving upper level low pressure system brought isolated showers and thunderstorms to northeast Pennsylvania during the afternoon, with isolated flash flooding occurring due to heavy rainfall from slow moving storms.
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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 BGM wrote it up.
A slow moving upper level low pressure system brought isolated showers and thunderstorms to northeast Pennsylvania during the afternoon, with isolated flash flooding occurring due to heavy rainfall from slow moving storms.
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 Binghamton, NY wrote its last area forecast discussion before the first event at Jul 3, 2:28 PM EST, 22 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BINGHAMTON NY 328 PM EDT FRI JUL 3 2009 .SYNOPSIS... A WEAK AREA OF HIGH PRESSURE WILL BUILD INTO THE REGION WITH DRIER WEATHER AND MODERATING TEMPERATURES EXPECTED THROUGH THE WEEKEND. ANOTHER UPPER LEVEL LOW PRESSURE SYSTEM WILL MOVE INTO THE AREA ON MONDAY BRINGING MORE CLOUDS AND SHOWERS. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... UPPER LEVEL SPOKE OF ENERGY ROTATING AROUND CUT OFF LOW OVER SW QUEBEC WILL MOVE EAST OF THE AREA TONIGHT. NUMEROUS SHOWERS LATE THIS AFTERNOON AND EARLY EVENING WILL COME TO AN END EARLY UPON THE LOSS OF DIURNAL HEATING. A SECONDARY WAVE IS FCST TO DIVE SOUTH ACROSS ERN LK ONTARIO AND NRN NY LATE THIS EVENING. THIS MAY TRIGGER ANOTHER FEW SHOWERS FOR THE TUG HILL AND WRN MHWK VALLEY AROUND MIDNIGHT...OTHERWISE DRY ADVECTION AND NEG POTENTIAL VORTICITY ADVECTION WILL PROMOTE DRY WX. FCST SOUNDINGS SHOW MOISTURE REMANING IN THE BOUNDARY LAYER...SO SOME STRATUS AND FOG IS POSSIBLE. AS DRIER ADVECTION DEEPENS TOWARD MORNING WE ARE EXPECTING A CLEARING TREND. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/... UPPER SHORT WAVE NOW MOVING NORTH OF THE UPR GTLKS WILL MOVE THROUGH NNY TONIGHT AND FINALLY BE THE KICKER FOR THE PERSISTENT UPPER LOW THAT HAS PLAUGED THE NORTHEAST FOR DAYS. THE UPR LOW WILL STILL BE FAIRLY CLOSE...LOCATED OVER SRN QUEBEC THROUGH THE WEEKEND...BUT WE WILL BE SETTING UP IN A DRIER NORTHWESTERLY FLOW WHICH SHOULD BRING A COUPLE OF THE BETTER DAYS WEVE EXPERIENCED IN THE LAST TWO WEEKS. SATURDAY APPEARS TO BE A VERY DECENT DAY WITH SUNSHINE MIXED WITH FAIR WX CU AND COMFORTABLE TEMPERATURES IN THE MID-UPR 70S AND LOW DEWPOINTS. SATURDAY NIGHT LOOKS TO BE RELATIVELY COOL FOR THIS TIME OF YEAR WITH LOWS DIPPING INTO THE UPR 40S IN OUR VALLEYS. AS WE HEAD INTO SUNDAY...THE NAM AND GFS DISAGREE WITH SPEED AND TIMING OF ANOTHER UPPER LEVEL DISTURBANCE MOVING THRU THE NW FLOW. WE WILL FOLLOW THE SLOWER...AND THUS DRIER GFS WHICH HAS LITTLE MOISTURE RETURN AND MAINTAINS AT LEAST A FLAT RIDGE OVER THE REGION. THE ECMWF IS ALSO SUPPORTING THIS. SUNDAYS FORECAST WILL THEREFORE AGAIN BE DRY WITH PARTIAL CLOUDINESS AND TEMPERATURES IN THE 70S. THE TROF IN THE EAST IS THEN EXPECTED TO START RELOADING SUN NITE INTO MONDAY WITH ANOTHER CUTOFF LOW DROPPING SOUTHEAST INTO NY. WILL LEAN WITH THE GFS/ECMWF TRENDS...BUT EVEN THE NAM HAS A SIMILAR GENERAL SOLUTION. WILL BRING THE CHANCE FOR SHOWERS BACK INTO THE FORECAST SUN NITE- MONDAY. WILL LEAN MORE TOWARD MONDAY BASED ON DIURNAL STABILITY TRENDS. && .LONG TERM /MONDAY NIGHT THROUGH THURSDAY/... THE MAIN STICKING POINT FOR THE FIRST PART OF THIS PERIOD CONCERNS THE ULTIMATE AMPLIFICATION/PROGRESSION OF ANOTHER NORTHEASTERN U.S./EASTERN CANADIAN UPPER LOW. THE GFS CONTINUES TO BE THE MORE PROGRESSIVE MODEL...OPENING THIS FEATURE UP MUCH MORE QUICKLY AND MOVING IT OFF TO THE NORTHEAST. MEANWHILE...THE EURO MODEL DIGS THIS SYSTEM FARTHER SOUTH TOWARDS NY STATE...AND IS SLOWER TO LIFT IT OUT BY WEDNESDAY OR THURSDAY. HPC IS STILL SIDING WITH THE EURO...AND THUS SO WILL WE. AS A RESULT...WELL INDICATE SCATTERED DIURNALLY DRIVEN CONVECTION ON TUESDAY...BECOMING MORE ISOLATED BY WEDNESDAY...AS HEIGHTS GRADUALLY BEGIN TO RISE. LATE IN THE WEEK...MODEL CONSENSUS IS FOR RIDGING TO BUILD NORTHEASTWARD FROM THE CENTRAL U.S...ALLOWING RAIN-FREE CONDITIONS TO PREVAIL...WITH MORE SEASONAL TEMPERATURES THAN WEVE SEEN LATELY (HIGHS INTO THE 80S). AT THIS EARLY JUNCTURE...IT APPEARS THAT A FRONTAL BOUNDARY COULD APPROACH ON SATURDAY...SO WEVE INSERTED A CHANCE FOR SHOWERS OR THUNDERSTORMS. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... EXPECT OCCASIONAL RESTRICTIONS IN SHOWERS/ISOLATED THUNDER THIS AFTERNOON...ALTHOUGH MUCH OF THE TIME VFR SHOULD PREVAIL. TONIGHT...AFTER PREVAILING VFR FOR THE FIRST PART OF THE EVENING...LOOK FOR MVFR CEILINGS TO DEVELOP OVERNIGHT...AS A STRATUS CLOUD DECK DEVELOPS. LACK OF CLEARING SHOULD PREVENT MUCH RADIATION FOG FROM FORMING...SO WEVE OPTED TO KEEP THINGS AS MVFR AT KELM. SATURDAY...WERE ANTICIPATING RAPID IMPROVEMENT BY MID- MORNING...AS MUCH DRIER AIR SWEEPS IN. WEST TO NORTHWEST WINDS AROUND 10 KT THIS AFTERNOON...SHOULD DIMINISH TO UNDER 5 KT TONIGHT...THEN PICK UP AGAIN TO 10-15 KT SATURDAY. OUTLOOK... .SUNDAY...MAINLY VFR. .MONDAY AND TUESDAY...RESTRICTIONS POSSIBLE IN SCATTERED SHOWERS AND THUNDERSTORMS...MOSTLY IN THE AFTERNOON HOURS. .WEDNESDAY...OTHER THAN POSSIBLE EARLY MORNING IFR FOG...MOSTLY AT KELM...MAINLY VFR EXPECTED. && .BGM WATCHES/WARNINGS/ADVISORIES... PA...NONE. NY...NONE. && SYNOPSIS...JAB NEAR TERM...JAB SHORT TERM...JAB LONG TERM...MLJ AVIATION...MLJ
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BINGHAMTON NY 417 AM EDT FRI JUL 3 2009 NYZ009-015>018-022>025-036-037-044>046-055>057-062-PAZ038>040-043- 044-047-048-072-040830- NORTHERN ONEIDA-YATES-SENECA-SOUTHERN CAYUGA-ONONDAGA-STEUBEN- SCHUYLER-CHEMUNG-TOMPKINS-MADISON-SOUTHERN ONEIDA-CORTLAND-CHENANGO- OTSEGO-TIOGA-BROOME-DELAWARE-SULLIVAN-BRADFORD-SUSQUEHANNA- NORTHERN WAYNE-WYOMING-LACKAWANNA-LUZERNE-PIKE-SOUTHERN WAYNE- 417 AM EDT FRI JUL 3 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL NEW YORK...SOUTHEASTERN NEW YORK AND NORTHEAST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PN
The Binghamton radar (KBGM), 100 km away, was scanning. The volume nearest the first event began at 19:47 UTC.
2 flash flood. Local standard time, as filed.
Slow moving thunderstorms caused a significant urban flood in Swoyersville. Water and debris was several feet deep across Main Street.
Thunderstorms with very heavy rain caused a mudslide which closed Bunker Hill Road. Several other roads were also closed due to flooding. Additionally, the heavy rain flooded several basements.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2009Every state in 2009This day in weather historyWarnings in Pennsylvania, 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: 187727, 187728.