The remains of an MCS from the Great Lakes moved across northwest Pennsylvania during the early morning hours with isolated severe thunderstorms.
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.
The remains of an MCS from the Great Lakes moved across northwest Pennsylvania during the early morning hours with isolated severe thunderstorms.
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 14, 1:26 AM EST, 2 hours 4 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 226 AM EDT FRI MAY 14 2010 .SYNOPSIS... A COLD FRONT WILL CROSS THE REGION TODAY...BRINGING SHOWERS AND THUNDERSTORMS. A FEW STORMS MAY BE STRONG TO LOCALLY SEVERE. THE FRONT WILL EXIT THE REGION TONIGHT...WITH HIGH PRESSURE PROVIDING FOR A DRY AND SEASONABLE WEEKEND. LOW PRESSURE WILL BRING A CHANCE OF SHOWERS AND STORMS FOR EARLY NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/... A FRONTAL BOUNDARY REMAINS NEARLY STATIONARY ACROSS NORTHERN OHIO AND NW PA. A BROKEN LINE OF SHOWERS WITH EMBEDDED THUNDERSTORMS RESIDE ALONG/JUST SOUTH OF THE FRONTAL BOUNDARY. FURTHER SOUTH...LITTLE/NO PRECIP IS OCCURRING WITH MOSTLY CLOUDY SKIES AND MUGGY MID/UPPER 60S ARE PREVAILING. THE FRONTAL BOUNDARY WILL MOVE LITTLE OVER THE NEXT FEW HOURS AS ANY UPPER SUPPORT TO PUSH THE BOUNDARY SOUTH REMAINS WELL TO THE WEST. THE FRONT WILL MOVE SOUTH ACROSS WESTERN PA THIS AFTN...AND ACROSS NORTH CENTRAL WV/WESTERN MD BY LATE AFTN/EARLY THIS EVENING. WILL KEEP NUMEROUS POPS FOR MOST AREAS...WITH PRECIP DECREASING BEHIND THE FRONT ACROSS NORTHERN OH/NW PA BY LATE AFTN...AND FOR THE REMAINDER OF THE AREA THIS EVENING. THINK THE GREATEST RISK FOR STRONG/SEVERE STORMS WILL BE ACROSS SOUTHWEST PA TO WESTERN MD WITH THE MOST STORM FAVORABLE DEEP LAYER SHEAR. STORM THREATS WILL BE WINDS/HAIL...AND WILL HIGHLIGHT IN THE GRIDS AND THE HAZARDOUS WEATHER OUTLOOK. TEMPERATURES IN THE 70S WILL PREVAIL TODAY...COOLING TO THE MID 40S TO LOWER 50S BEHIND THE FRONT OVERNIGHT. && .SHORT TERM /SATURDAY THROUGH SUNDAY/... HIGH PRESSURE WILL BUILD OVER THE AREA SATURDAY FOR DRY AND SEASONABLE CONDITIONS. THE RIDGE WILL FLATTEN SUNDAY...ALLOWING FOR A WEAK IMPULSE TO PERHAPS CLIP I-70 SOUTHWARD. WITH DEEP MOISTURE LACKING...WILL KEEP SUNDAY DRY...WITH SOME ENHANCED MID LEVEL CLOUDS SUNDAY AFTN. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... CLOUDS WILL CONTINUE TO INCREASE SUNDAY NIGHT IN ADVANCE OF THE NEXT SYSTEM. MEDIUM RANGE MODELS ARE IN GENERAL AGREEMENT BRINGING LOW PRESSURE OVER THE REGION MONDAY...LINGERING THROUGH MIDWEEK. THE SYSTEMS WARM FRONTAL SURGE WILL MOVE ACROSS MONDAY...WITH THE COLD FRONT/TROUGH AXIS PROGGED TO CROSS THE AREA TUESDAY INTO WEDNESDAY. WITH GOOD RUN TO RUN CONTINUITY MONDAY INTO TUESDAY...WILL USE LIKELY POPS FOR ALL AREAS...WITH CHANCES DECREASING BY TUESDAY NIGHT/WEDNESDAY AS THE SYSTEM BEGINS TO EXIT. DRIER CONDITIONS ARE EXPECTED THURSDAY AS RIDGING BEGINS TO BUILD IN. && .AVIATION /06Z FRIDAY THROUGH TUESDAY/... A COLD FRONT WILL CROSS THE REGION THIS MORNING...BRINGING A ROUND OF SHOWERS AND STORMS...MAINLY AFTER SUNRISE. HOWEVER...A LINGERING BOUNDARY ACROSS THE NORTHERN TIER...WILL RESULT IN A FEW SHOWERS AND STORMS FOR KFKL...KDUJ DURING THE PRE DAWN HOURS THIS MORNING AS WELL. WHILE CONDITIONS WILL PREVAIL AT MVFR TO VFR TODAY...A PERIOD OF IFR WILL BE POSSIBLE IN STORMS. THE POTENTIAL FOR WIND SHEAR WILL EXIST THROUGH AROUND 9Z THIS MORNING...WITH A STRONG LOW LEVEL JET PRESENT. HIGH PRESSURE WILL BUILD IN TONIGHT...AND HOLD THROUGH THE WEEKEND WITH PREVAILING VFR EXPECTED. A LOW PRESSURE WILL PROVIDE FOR A CHANCE OF SHOWERS AND STORMS AND REDUCED CONDITIONS MONDAY AND TUESDAY. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 317 AM EDT FRI MAY 14 2010 MDZ001-PAZ021-023-029>032-WVZ004-012-021>023-041-151000- GARRETT-ALLEGHENY-INDIANA-WASHINGTON-WESTMORELAND-GREENE-FAYETTE- MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER- 317 AM EDT FRI MAY 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY INTO THIS EVENING. THE MAIN SEVERE THREATS ARE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020-022- WVZ001>003-151000- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST- LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ARMSTRONG-HANCOCK-BROOKE- OHIO- 317 AM EDT FRI MAY 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. STRONG THUNDERSTORMS ARE POSSIBLE TODAY WITH A PASSAGE OF A COLD FRONT. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1036 PM EDT THU MAY 13 2010 PAZ007-008-140330- MERCER PA-VENANGO PA- 1036 PM EDT THU MAY 13 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... VENANGO AND MERCER... AT 1033 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 36 MILES WEST OF FREDONIA...OR ABOUT 27 MILES NORTHWEST OF SHARON...MOVING EAST AT 45 MPH. THESE STORMS COULD PRODUCE HAIL AND WIND GUSTS OVER 35 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... FREDONIA... MAURICE K GODDARD STATE PARK... STONEBORO... SUGARCREEK... SENECA... POLK... OIL CREEK STATE PARK... OIL CITY... KENNERDELL... 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 1110 PM EDT THU MAY 13 2010 PAZ008-009-015-016-140345- CLARION PA-FOREST PA-JEFFERSON PA-VENANGO PA- 1110 PM EDT THU MAY 13 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... JEFFERSON...VENANGO...FOREST AND CLARION... AT 1106 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 8 MILES NORTH OF SUGARCREEK...MOVING EAST AT 45 MPH. THESE STORMS COULD PRODUCE HAIL AND GUSTY WINDS OVER 35 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... SUGARCREEK... POLK... OIL CITY... SENECA... OIL CREEK STATE PARK... TIONESTA... FRYBURG... WEST HICKORY... KELLETTVILLE... COOK FOREST STATE PARK... REDCLYFFE... MARIENVILLE... 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 1150 PM EDT THU MAY 13 2010 PAZ007>009-015-016-140530- MERCER-VENANGO-FOREST-CLARION-JEFFERSON PA- INCLUDING THE CITIES OF...SHARON...HERMITAGE...GROVE CITY... GREENVILLE...FARRELL...OIL CITY...FRANKLIN...SUGARCREEK... TIONESTA...CLARION...PUNXSUTAWNEY...BROOKVILLE...REYNOLDSVILLE... BROCKWAY 1150 PM EDT THU MAY 13 2010 A LINE OF THUNDERSTORMS WILL MOVE THROUGH THE FOLLOWING COUNTIES... JEFFERSON...VENANGO...FOREST AND CLARION... AT 1150 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING HAIL AND WIND GUSTS OVER 35 MPH. THESE STORMS WILL CONTINUE MOVING EAST THROUGH THESE COUNTIES THROUGH 1AM.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 101 AM EDT FRI MAY 14 2010 PAZ007>009-015-016-140615- MERCER-VENANGO-FOREST-CLARION-JEFFERSON PA- INCLUDING THE CITIES OF...SHARON...HERMITAGE...GROVE CITY... GREENVILLE...FARRELL...OIL CITY...FRANKLIN...SUGARCREEK... TIONESTA...CLARION...PUNXSUTAWNEY...BROOKVILLE...REYNOLDSVILLE... BROCKWAY 101 AM EDT FRI MAY 14 2010 ...THUNDERSTORM UPDATE... THE NATIONAL WEATHER SERVICE EXPECTS THUNDERSTORMS TO CONTINUE MOVING EAST ACROSS THE NORTHWESTERN PENNSYLVANIA COUNTIES OF MERCER...VENANGO...CLARION....FOREST...AND JEFFERSON...THROUGH 2 AM. THE THUNDERSTORMS CAN PRODUCE WIND GUSTS OVER 35 MPH. RAIN AMOUNTS WILL BE GENERALLY A HALF INCH...BUT REPEATED THUNDERSTORM RAINS ARE POSSIBLE AND COULD PRODUCE RAIN AMOUNTS OF OVER AN INCH. LOCATIONS GETTING HEAVIER RAIN MAY EXPERIENCE LOW VISIBILITIES IN FOG OVERNIGHT. A SHORT BOUT OF LIGHTNING AND HAIL MAY ALSO OCCUR. IF TRAVELING....TAKE EXTRA CARE. THE STORMS HAVE BEEN ALIGNED IN TWO SEPARATE BANDS ORIENTED WEST TO EAST. THE BANDS HAVE BEEN MOVING SLOWLY SOUTH WHILE INDIVIDUAL THUNDERSTORM CELLS HAVE BEEN MOVING EAST AT 40 MPH. NEW STORMS FROM THE CLEVELAND OHIO AREA MAY AFFECT THE AREA BETWEEN 2 AM AND 4 AM. THE NATIONAL WEATHER SERVICES ADVISES TO KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE...AND RAIN AMOUNTS OVER AN INCH...TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 213 AM EDT FRI MAY 14 2010 PAZ007-140715- MERCER PA- 213 AM EDT FRI MAY 14 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTY... MERCER... AT 208 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED A LINE OF STRONG THUNDERSTORMS 45 MILES WEST OF SHARON...OR ABOUT 39 MILES NORTH OF HOMEWORTH...MOVING EAST AT 60 MPH. THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... FARRELL... SHARON... HERMITAGE... FREDONIA... MERCER... 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 248 AM EDT FRI MAY 14 2010 PAZ007>009-015-016-140745- CLARION PA-FOREST PA-JEFFERSON PA-MERCER PA-VENANGO PA- 248 AM EDT FRI MAY 14 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... JEFFERSON...VENANGO...FOREST...CLARION AND MERCER... AT 246 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 12 MILES NORTHWEST OF FREDONIA...MOVING EAST AT 60 MPH. THESE STORMS WILL BE CAPABLE OF PRODUCING WIND GUSTS TO 45 MPH...IN ADDITION TO SMALL HAIL. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... SHARON... HERMITAGE... FREDONIA... MAURICE K GODDARD STATE PARK... STONEBORO... POLK... SUGARCREEK... KENNERDELL... OIL CITY... SENECA... OIL CREEK STATE PARK... VAN... 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), 81 km away, was scanning. The volume nearest the first event began at 08:31 UTC.
2 thunderstorm wind. Local standard time, as filed.
Emergency management reported numerous trees down in the Sharon, Farrell, and Hermitage areas.
Emergency management reported large trees down on cars at car dealership at Riverside Drive and US Route 62 in Cranberry Township.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2010Every state in 2010This day in weather historyWarnings in Pennsylvania, May 2010
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: 221796, 221797.