Scattered severe thunderstorms develop during the evening along a stalled front across northwest Pennsylvania and southeast Ohio.
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.
Scattered severe thunderstorms develop during the evening along a stalled front across northwest Pennsylvania and southeast Ohio.
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 Apr 23, 1:48 PM EST, 5 hours 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 248 PM EDT MON APR 23 2007 .SHORT TERM /TONIGHT THROUGH TUESDAY/... COLD FRONT WILL PUSH ACROSS THE FORECAST AREA LATE TONIGHT AND INTO NORTHERN WEST VIRGINIA BY 12Z TUESDAY. STILL PLAN TO GO WITH LIKELY POPS FOR SHOWERS AND THUNDERSTORMS TONIGHT AHEAD OF AND ALONG FRONT...THEN CHANCE POPS FOR SHOWERS LATE TONIGHT AND TUESDAY IN FAR SOUTHEAST ZONES. TEMPERATURES ARE CLOSE TO ETA MOS GUIDANCE VALUES. && .LONG TERM /TUESDAY NIGHT THROUGH MONDAY/... AN UNSETTLED PERIOD IN STORE THROUGH THE LONG TERM. SURFACE BOUNDARY WILL PERSIST ALONG PA/WV LINE FROM TUESDAY NIGHT INTO WEDNESDAY NIGHT. THIS BOUNDARY WILL BE GENERAL PATH OF A SERIES OF DISTURBANCES. LOW PRESSURE WILL LIFT NORTHEAST ACROSS OHIO VALLEY ON THURSDAY INTO THURSDAY NIGHT. A WEAK HIGH PRESSURE RIDGE WILL PUSH NORTHEAST INTO THE REGION INTO SATURDAY NIGHT...QUICKLY FOLLOWED BY ANOTHER LOW PRESSURE SYSTEM BY SUNDAY NIGHT. && .AVIATION /TONIGHT AND TUESDAY/... COLD FRONT WILL PUSH SOUTHEASTWARD ACROSS THE UPPER OHIO VALLEY REGION TONIGHT AND INTO CENTRAL WEST VIRGINIA BY TUESDAY AFTERNOON. EXPECT INITIAL LINE OF SHOWERS TO CROSS WESTERN PA AND NORTHERN WV DURING THE REMAINDER OF THIS AFTERNOON. ADDITIONAL LINES OF SHOWERS AND SCATTERED THUNDERSTORMS SHOULD CONTINUE TO DEVELOP ALONG AND AHEAD OF FRONTAL BOUNDARY AND IT MOVES ACROSS THE REGION TONIGHT. STRONG SOUTHWEST SURFACE WINDS WILL GUST TO AROUND 30 KT THROUGH THIS EVENING...THEN BECOME NORTHWEST AROUND 12 KT LATER TONIGHT WITH OCCASIONAL GUSTS TO AROUND 20 KT. EXPECT SCATTERED TO BROKEN CLOUDS AROUND 4000 FEET THROUGH THE EVENING WITH CONDITIONS OCCASIONALLY LOWERING TO MVFR CEILING AND VISIBILITY IN SHOWERS AND THUNDERSTORMS. LATER TONIGHT AND TUESDAY MORNING...CEILINGS AROUND 3000 FEET ARE FORECAST. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && 31/14
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 335 AM EDT MON APR 23 2007 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029>032-WVZ001>004-012-021>023-041-240745- GARRETT-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-PRESTON-TUCKER- 335 AM EDT MON APR 23 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY 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 653 PM EDT MON APR 23 2007 PAZ007-008-232345- MERCER PA-VENANGO PA- 653 PM EDT MON APR 23 2007 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... VENANGO AND MERCER... AT 639 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED THUNDERSTORMS MOVING ACROSS TRUMBULL AND ASHTABULA COUNTIES IN OHIO. THESE STORMS WILL MOVE ACROSS VENANGO AND MERCER COUNTIES IN NORTHWEST PENNSYLVANIA BETWEEN 7 PM AND 8 PM. THE STORMS MAY BE ACCOMPANIED BY DANGEROUS LIGHTNING...WIND GUSTS TO 50 MPH AND SMALL HAIL. THE STORMS ARE MOVING EAST AT 40 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... FREDONIA...HERMITAGE...KENNERDELL...MAURICE K GODDARD STATE PARK... MERCER...OIL CITY...POLK...SENECA...STONEBORO AND SUGARCREEK 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.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
734 PM EDT MON APR 23 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0720 PM TSTM WND DMG 6 S GREENVILLE 41.32N 80.38W
04/23/2007 MERCER PA EMERGENCY MNGR
NUMEROUS TREES DOWN. SHINGLES BLOWN OFF OF ROOF. ALL NEAR
LAKE PYMATUNING.
&&The Cleveland radar (KCLE), 95 km away, was scanning. The volume nearest the first event began at 00:14 UTC.
1 thunderstorm wind. Local standard time, as filed.
A trained spotter reported a 15 to 20 foot section of steel roof was ripped off a barn in Dundee.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2007Every state in 2007This day in weather historyWarnings in Ohio, April 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: 26172.