A slow moving thunderstorm produced flash flooding in Pittsburgh.
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 PBZ wrote it up.
A slow moving thunderstorm produced flash flooding in Pittsburgh.
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 Pittsburgh, PA wrote its last area forecast discussion before the first event at May 31, 1:48 PM EST, 4 hours 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 248 PM EDT THU MAY 31 2007 .SYNOPSIS... WEAK UPPER LEVEL RIDGE OF HIGH PRESSURE WILL BRING MAINLY DRY WEATHER INTO SUNDAY. UPPER RIDGE BREAKS DOWN LATE SUNDAY INTO MONDAY AS CLOSED LOW OVER THE MIDWEST BECOMES A SLOW MOVING OPEN TROF AND MOVES THROUGH THE GREAT LAKES BY TUESDAY. WEAK RIDGING BEHIND THE SHORT WAVE WILL BRING DRY WEATHER WEDNESDAY. && .NEAR TERM /THROUGH FRIDAY/... WEAK UPPER LEVEL RIDGE ACROSS THE DISTRICT WILL BRING SOUTHERLY FLOW TO THE AREA. WARM TEMPERATURES AND INCREASING MOISTURE WILL BE THE RESULT. THE INCREASED MOISTURE WILL BRING A BETTER CHANCE OF ISOLATED SHOWERS AND THUNDERSTORMS ON FRIDAY. && .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/... TEMPERATURES WILL REMAIN ABOVE NORMAL INTO SUNDAY IN LOW LEVEL MORE MOIST SOUTHERLY FLOW. WE WILL BE IN THE WARM SECTOR BOTH SATURDAY AND SUNDAY WITH SCATTERED AIRMASS THUNDERSTORMS DURING MAX HEATING ...WITH A SLIGHT CHANCE FOR PCPN AT OTHER TIMES. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... UPPER CLOSED CUTOFF LOW MOVES TO THE CENTRAL GREAT LAKES SUNDAY EVENING. SUNDAY NIGHT AND ON INTO MONDAY UPPER LOW OPENS INTO A TROUGH AND SLOWLY MOVES ACROSS OUR AREA LATE MONDAY NIGHT. WE REMAIN IN UPPER NORTHWEST FLOW INTO WEDNESDAY WHEN UPPER PATTERN FLATTENS OVER PENNSYLVANIA. IN NORTHWEST FLOW WE GET BACK TO NEAR NORMAL TEMPERATURES FOR MONDAY-WEDNESDAY...HIGHS IN THE MID 70S AND LOWS IN THE MID 50S. ON THURSDAY BACK TO ABOVE NORMAL TEMPERATURES IN SOUTHWEST LOW LEVEL FLOW AS NEXT COLD FRONT APPROACHES FROM THE WEST. && .AVIATION /19Z THURSDAY THROUGH TUESDAY/... GENERALLY VFR CONDITIONS WILL CONTINUE DURING THE TAF PERIOD AS HIGH PRESSURE WILL CONTROL THE WEATHER. THERE WILL BE INCREASED LOW LEVEL MOISTURE ON FRIDAY BRINGING AREAS OF MVFR FOG TO THE REGION AROUND DAYBREAK. THE HOT TEMPERATURES AND INCREASED MOISTURE COULD PRODUCE ISOLATED SHOWERS AND THUNDERSTORMS. IFR CONDITIONS ARE POSSIBLE SHOULD A THUNDERSTORM CROSS THE PATH OF AN AIRPORT IN THE AFTERNOON. LOW LEVEL MOISTURE WILL INCREASE AS A SLOW MOVING STORM SYSTEM MOVES ACROSS THE UPPER MS VALLEY AND INTO THE GREAT LAKES OVER THE WEEKEND INTO EARLY NEXT WEEK. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE PITTSBURGH PA 124 PM EDT THU MAY 31 2007 MDZ001-WVZ023-041-011730- GARRETT-PRESTON-TUCKER- 124 PM EDT THU MAY 31 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND AND NORTHERN WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. THE MAIN THREAT IS LARGE HAIL AND STRONG DOWNBURSTS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029>032-WVZ001>004-012-021-022-011730- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST- LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG- INDIANA-WASHINGTON-WESTMORELAND-GREENE-FAYETTE-HANCOCK-BROOKE-OHIO- MARSHALL-WETZEL-MARION-MONONGALIA- 124 PM EDT THU MAY 31 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 423 PM EDT THU MAY 31 2007 OHZ041-312130- COLUMBIANA OH- 423 PM EDT THU MAY 31 2007 ...THUNDERSTORMS... STRONG AND SLOW MOVING THUNDERSTORMS ENTERING PORTION OF SOUTHERN COLUMBIANA COUNTY... AT 413 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 9 MILES SOUTH OF GUILFORD LAKE STATE PARK...OR ABOUT 2 MILES SOUTHWEST OF MILLPORT...MOVING NORTHEAST AT 10 MPH. THESE STORMS HAVE A HISTORY OF PRODUCING HAIL AND VERY HEAVY DOWNPOURS. BECAUSE THESE STORMS ARE MOVING SO SLOWLY...LOCATIONS CAN EXPECT HIGH RAINFALL AMOUNTS IN A SHORT PERIOD OF TIME. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... GUILFORD LAKE STATE PARK AND LISBON KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 440 PM EDT THU MAY 31 2007 OHZ050-312145- JEFFERSON OH- 440 PM EDT THU MAY 31 2007 ...THUNDERSTORMS... AREA OF STRONG AND SLOW MOVING THUNDERSTORMS DEVELOPING ACROSS NORTHERN JEFFERSON COUNTY... AT 433 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 6 MILES WEST OF HAMMONDSVILLE...OR ABOUT 3 MILES SOUTHEAST OF SALINEVILLE...MOVEMENT WAS NEARLY STATIONARY. THESE STORMS HAVE A HISTORY OF PRODUCING HAIL AND VERY HEAVY DOWNPOURS. SINCE THESE STORMS ARE MOVING SO SLOW...LOCATIONS CAUGHT UNDER A STORM CAN EXPECT HIGH RAINFALL AMOUNTS IN A SHORT PERIOD OF TIME. FREQUENT CLOUD TO GROUND LIGHTNING STRIKES WILL OCCUR AS WELL. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... HAMMONDSVILLE AND RICHMOND KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 446 PM EDT THU MAY 31 2007 WVZ001-312145- HANCOCK WV- 446 PM EDT THU MAY 31 2007 ...THUNDERSTORMS... STRONG AND SLOW MOVING THUNDERSTORMS DEVELOPING ACROSS NORTHERN HANCOCK COUNTY... AT 438 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 3 MILES NORTHWEST OF TOMLINSON RUN STATE PARK...OR ABOUT 3 MILES SOUTH OF WELLSVILLE...MOVING NORTHEAST AT 5 MPH. THESE STORMS HAVE A HISTORY OF PRODUCING HAIL AND VERY HEAVY RAIN. BECAUSE THESE STORMS ARE MOVING SO SLOWLY...LOCATIONS CAUGHT UNDER A STORM CAN EXPECT HIGH RAINFALL AMOUNTS IN A VERY SHORT PERIOD OF TIME. FREQUENT CLOUD TO GROUND LIGHTING STRIKES AND WIND GUSTS IN EXCESS OF 30 MPH ARE LIKELY. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... CHESTER...NEW MANCHESTER AND TOMLINSON RUN STATE PARK KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 451 PM EDT THU MAY 31 2007 PAZ020-312145- BEAVER PA- 451 PM EDT THU MAY 31 2007 ...THUNDERSTORMS... AREA OF STRONG THUNDERSTORMS SLOWLY MOVING INTO WESTERN BEAVER COUNTY... AT 443 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 5 MILES WEST OF SHIPPINGPORT...OR ABOUT 3 MILES NORTHEAST OF CHESTER...MOVING EAST AT 5 MPH. THESE STORMS HAVE A HISTORY OF PRODUCING HAIL AND VERY HEAVY RAIN. SINCE THESE STORMS ARE MOVING SO SLOW...LOCATIONS CAUGHT UNDER A STORM CAN EXPECT HIGH RAINFALL AMOUNTS IN A VERY SHORT PERIOD OF TIME. FREQUENT CLOUD TO GROUND LIGHTING AND WINDS IN EXCESS OF 30 MPH ARE LIKELY. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... BLACKHAWK...HARSHAVILLE AND SHIPPINGPORT KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 509 PM EDT THU MAY 31 2007 PAZ021-312215- ALLEGHENY PA- 509 PM EDT THU MAY 31 2007 ...THUNDERSTORMS... AREA OF THUNDERSTORMS RAPIDLY DEVELOPING OVER SOUTHERN ALLEGHENY COUNTY... AT 502 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS OVER BRIDGEVILLE...MOVING EAST AT 5 MPH. THESE STORMS ARE CAPABLE OF PRODUCING HAIL AND VERY HEAVY RAIN. SINCE THESE STORMS ARE MOVING SO SLOWLY...LOCATIONS CAUGHT UNDER A STORM CAN EXPECT HIGH RAINFALL AMOUNTS IN A SHORT PERIOD OF TIME. FREQUENT CLOUD TO GROUND LIGHTNING STRIKES ARE LIKELY AS WELL. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... BALDWIN...BRIDGEVILLE...CARNEGIE...DOWNTOWN PITTSBURGH...MCKEES ROCKS...MCKEESPORT...MOUNT LEBANON...NORTH SIDE...SOUTH SIDE AND WEST MIFFLIN KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 636 PM EDT THU MAY 31 2007 PAZ021-312330- ALLEGHENY PA- 636 PM EDT THU MAY 31 2007 ...THUNDERSTORMS... THUNDERSTORMS CONTINUE TO PRODUCE VERY HEAVY RAIN OVER PORTIONS OF CENTRAL AND EASTERN ALLEGHENY COUNTY... AT 630 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 2 MILES NORTH OF NORTH SIDE...MOVING EAST AT 5 MPH. THESE STORMS CONTINUE TO PRODUCE VERY HEAVY RAIN OVER THE SAME AREAS. BECAUSE OF THE SLOW MOVEMENT OF THESE STORMS...POOR DRAINAGE FLOODING IS LIKELY AS WELL AS RAPID PONDING OF WATER IN LOW LYING AREAS. IF YOU LIVE NEAR A STREAM...KEEP A CLOSE EYE ON WATER LEVELS AS THEY WILL BE RISING. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... DOWNTOWN PITTSBURGH...FOX CHAPEL...MCKEES ROCKS...MOUNT LEBANON... NORTH SIDE...PENN HILLS...PERRYSVILLE...SOUTH SIDE...TURTLE CREEK...WEST MIFFLIN AND WILKINSBURG KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
The Pittsburgh radar (KPBZ), 23 km away, was scanning. The volume nearest the first event began at 23:13 UTC.
2 flash flood. Local standard time, as filed.
Emergency management reported flash flooding in Pittsburgh along Spring Garden Avenue.
Emergency management reported flash flooding along Farragut Street in Pittsburgh.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2007Every state in 2007This day in weather historyWarnings in Pennsylvania, May 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: 26650, 26651.