A cold front moved across the Mason Dixon line producing with scattered severe thunderstorms across western Pennsylvania, northern West Virginia, and Garrett county Maryland.
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 cold front moved across the Mason Dixon line producing with scattered severe thunderstorms across western Pennsylvania, northern West Virginia, and Garrett county Maryland.
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 Jun 24, 9:33 AM EST, 1 hour 27 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 1033 AM EDT THU JUN 24 2010 .SYNOPSIS... A COLD FRONT WILL MOVE THROUGH THE REGION TODAY KEEPING IN THE RISK FOR SHOWERS AND STORMS. HIGH PRESSURE WILL PROVIDE A DRY END TO THE WEEK. && .NEAR TERM /THROUGH TONIGHT/... SEVERE THUNDERSTORMS WATCH 404 ISSUED FOR WV MD AND MUCH OF PA COUNTIES SOUTH OF I-80. UPDATED GRIDS TO REFLECT THIS. && .SHORT TERM /FRIDAY THROUGH SATURDAY/... SURFACE HIGH PRESSURE WILL BUILD UNDER NORTHWEST FLOW AND PROVIDE DRY WEATHER TONIGHT AND FRIDAY. HOWEVER, TRAILING AIRMASS IS NOT PROGGED TO REPRESENT A DRAMATIC CHANGE AND TEMPERATURE FORECAST WILL BE CLOSER TO, BUT STILL ABOVE NORMAL. SHORTWAVE IN NORTHWEST FLOW IS PROGGED TO CROSS THE NORTHEASTERN U.S. ON SATURDAY. AS BOUNDARY LAYER MOISTURE SHOULD BE, OR SHOULD HAVE SUFFICIENT TIME TO RECOVER WITH THE ADVANCE OF THAT SYSTEM, WILL INTRODUCE A SLIGHT, TO CHANCE THUNDERSTORM PROBABILITY FOR PORTIONS OF THE REGION ON SATURDAY, ALTHOUGH CONFIDENCE IN TIMING MUST REMAIN MINIMAL IN THAT FLOW PATTERN. SATURDAY TEMPERATURES ARE PROJECTED 5 TO 10 DEGREES ABOVE NORMAL USING MODERATED GUIDANCE. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... THE PROGNOSIS FOR THE LONG TERM PERIOD FEATURES THE DEVELOPMENT OF AN EAST COAST TROUGH AS DEPICTED VIA GFS/ECMWF MODELS. FORECAST WILL THUS INCLUDE EARLY WEEK CHANCE PRECIP PROBABILITIES FOR THE ADVANCE AND IMMEDIATE PASSAGE OF THE SURFACE FRONT AND TROUGH AXIS, FOLLOWED BY A DRYING TREND INTO MIDWEEK. && .AVIATION /15Z THURSDAY THROUGH MONDAY/... A WEAK COLD FRONT WILL PUSH THROUGH THE REGION THIS MORNING. A LINE OF RAIN SHOWERS CAN BE EXPECTED WITH THE FRONT WITH LITTLE OR NO LIGHTNING. SOME WIND GUSTS OF 30 TO 35 KNOTS CAN BE EXPECTED WITH THE LINE OF SHOWERS BUT LITTLE RISK OF THUNDERSTORMS. SOME BRIEF MVFR CEILINGS ARE POSSIBLE WITH THE SHOWERS. GENERAL VFR CONDITIONS CAN BE EXPECTED FOR THE REST OF THE DAY AFTER THE SHOWERS PUSH EAST OF THE DISTRICT BY MID MORNING. HIGH PRESSURE ON FRIDAY AND SATURDAY SHOULD BRING THE RETURN OF DRY WEATHER AND GENERAL VFR CONDITIONS. THE NEXT APPROACHING LOW PRESSURE SYSTEM WILL PUSH A WARM FRONT THROUGH THE UPPER OHIO VALLEY REGION SUNDAY WITH A COLD FRONTAL PASSAGE ON MONDAY. THIS SYSTEM WILL BRING SCATTERED SHOWERS AND STORMS WITH POSSIBLE MVFR/IFR RESTRICTIONS. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 1022 AM EDT THU JUN 24 2010 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013-251430- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST- LAWRENCE- 1022 AM EDT THU JUN 24 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA AND WEST CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. A COLD FRONT WILL PROVIDE THE RISK FOR SHOWERS AND STORMS TODAY. STORMS THAT DEVELOP TODAY ARE NOT EXPECTED TO REACH SEVERE LEVELS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. 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. MDZ001-PAZ014>016-020>023-029>032-WVZ001>004-012-021>023-041-251430- GARRETT-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG- INDIANA-WASHINGTON-WESTMORELAND-GREENE-FAYETTE-HANCOCK-BROOKE-OHIO- MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER- 1022 AM EDT THU JUN 24 2010 ...SEVERE THUNDERSTORM WATCH 404 IN EFFECT UNTIL 6 PM EDT THIS EVENING... 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. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. A COLD FRONT WILL PROVIDE THE RISK FOR SHOWERS AND STORMS TODAY. THERE IS A SLIGHT RISK THAT STORMS COULD REACH SEVERE LEVELS. THE MAIN SEVERE THREAT WILL BE DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. 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
815 AM EDT THU JUN 24 2010
PAZ007-008-013-014-241245-
BUTLER PA-LAWRENCE PA-MERCER PA-VENANGO PA-
815 AM EDT THU JUN 24 2010
...THUNDERSTORMS...
THUNDERSTORMS WITH GUSTY WINDS AND HEAVY RAINS TO MOVE THROUGH THE
FOLLOWING COUNTIES...
BUTLER...VENANGO...MERCER AND LAWRENCE...
AT 805 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
SHOWED THUNDERSTORMS WITH HEAVY RAIN ALONG A LINE EXTENDING FROM 18
MILES NORTHWEST OF SHARON TO 8 MILES WEST OF SHARON TO 29 MILES WEST
OF FARRELL...OR ALONG A LINE EXTENDING FROM 18 MILES NORTHWEST OF
SHARON TO 8 MILES WEST OF SHARON TO 16 MILES NORTHWEST OF SALEM...
MOVING EAST AT 60 MPH.
THESE THUNDERSTORMS CAN PRODUCE GUSTY WINDS AND HEAVY RAIN THAT MAY
CAUSE PONDED WATER ON ROADS AND IN LOW LYING AREAS. VISIBILITY CAN
BE REDUCED.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE THUNDERSTORMS
INCLUDE...
SHARON... FARRELL... HERMITAGE...
FREDONIA... MERCER...
MAURICE K GODDARD STATE PARK... STONEBORO...
NEW WILMINGTON... POLK... SUGARCREEK...
KENNERDELL... GROVE CITY...
PLEASE REPORT WIND DAMAGE AND HEAVY RAIN TO THE NATIONAL WEATHER
SERVICE BY CALLING TOLL FREE...1-877-633-6772.
LAT...LON 4155 7973 4126 7974 4104 8024 4104 8053
4149 8052 4148 8014 4149 8001 4155 7994PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
833 AM EDT THU JUN 24 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0650 PM TSTM WND DMG ARMAGH 40.45N 79.03W
06/23/2010 INDIANA PA PUBLIC
NUMEROUS LARGE TREES UPROOTED OR TOPPED OFF AROUND THE
SHELLBARK RD AREA.
&&SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
844 AM EDT THU JUN 24 2010
PAZ007>009-014-015-022-241330-
ARMSTRONG PA-BUTLER PA-CLARION PA-FOREST PA-MERCER PA-VENANGO PA-
844 AM EDT THU JUN 24 2010
...STRONG THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING
COUNTIES...ARMSTRONG...BUTLER...VENANGO...FOREST...CLARION AND
MERCER...
AT 840 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
INDICATED STRONG THUNDERSTORMS 4 MILES NORTH OF HERMITAGE...MOVING
EAST AT 60 MPH.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE...
SHARON... HERMITAGE... FARRELL...
FREDONIA... MERCER... GROVE CITY...
MAURICE K GODDARD STATE PARK... STONEBORO...
POLK... CLINTONVILLE... SUGARCREEK...
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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY
MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND CREEKS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.
&&
LAT...LON 4163 7941 4112 7943 4113 8053 4149 8053
4150 8045 4148 8030 4149 8001 4159 7990
4160 7986 4163 7983 4162 7975 4162 7962
4163 7961
WOODRUMSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
915 AM EDT THU JUN 24 2010
PAZ009-015-016-241345-
CLARION PA-FOREST PA-JEFFERSON PA-
915 AM EDT THU JUN 24 2010
...STRONG THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING
COUNTIES...JEFFERSON...FOREST AND CLARION...
AT 913 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
INDICATED STRONG THUNDERSTORMS 3 MILES NORTHWEST OF COOK FOREST STATE
PARK...MOVING EAST AT 65 MPH. STORMS WILL BE CAPABLE OF PRODUCING
WINDS GUSTS UP TO 40 MPH.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE...
WEST HICKORY... LIMESTONE... KELLETTVILLE...
CLARION... COOK FOREST STATE PARK...
SUMMERVILLE... BALLTOWN... REDCLYFFE...
MARIENVILLE... BROOKVILLE...
CLEAR CREEK STATE PARK... LYNCH...
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.
LAT...LON 4118 7877 4113 7880 4102 7881 4104 7945
4163 7942 4163 7896 4144 7895 4144 7906
4141 7908 4136 7909 4136 7903 4138 7896
4126 7873 4124 7873 4123 7870 4120 7870
WOODRUMSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1004 AM EDT THU JUN 24 2010
PAZ015-016-241430-
CLARION PA-JEFFERSON PA-
1004 AM EDT THU JUN 24 2010
...STRONG THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING
COUNTIES...JEFFERSON AND CLARION...
AT 1000 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
INDICATED STRONG THUNDERSTORMS 3 MILES EAST OF CLARION...MOVING EAST
AT 55 MPH. STORMS WILL BE CAPABLE OF PRODUCING WINDS GUSTS OF 40 TO
50 MPH.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE...
LIMESTONE... CLARION... SUMMERVILLE...
BROOKVILLE... CLEAR CREEK STATE PARK...
REYNOLDSVILLE... BROCKWAY...
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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY
MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND CREEKS MAY ALSO
RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS.
&&
LAT...LON 4120 7876 4116 7879 4103 7880 4105 7939
4140 7939 4141 7921 4133 7921 4134 7920
4132 7918 4134 7918 4133 7917 4133 7912
4136 7909 4138 7896 4128 7875 4124 7873
4123 7870 4120 7870
WOODRUMSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1137 AM EDT THU JUN 24 2010
OHZ059-068-069-PAZ029>032-WVZ004-012-021>023-041-241630-
BELMONT OH-FAYETTE PA-GREENE PA-MARION WV-MARSHALL WV-MONONGALIA
WV-MONROE OH-NOBLE OH-PRESTON WV-TUCKER WV-WASHINGTON PA-WESTMORELAND
PA-WETZEL WV-
1137 AM EDT THU JUN 24 2010
...THUNDERSTORMS...
THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING
COUNTIES...MONROE...NOBLE...FAYETTE...WESTMORELAND...
GREENE...TUCKER...MARION...WETZEL...PRESTON...MONONGALIA AND
MARSHALL...
AT 1135 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
INDICATED A LINE OF THUNDERSTORMS STRETCHING FROM SOUTHERN NOBLE
COUNTY IN OHIO ACROSS PARTS OF MONROE COUNTY AND INTO MARSHALL
COUNTY WEST VIRGINIA AND THEN INTO GREENE COUNTY PENNSYLVANIA. THE
STORMS WERE MOVING TO THE EAST ABOUT 35 MPH.
THE LINE OF STORMS WILL CONTINUE EAST AND SOUTHEAST AND AFFECT
WETZEL, MONONGALIA, AND MARION COUNTIES BETWEEN NOON AND 130 PM AND
PRESTON AND GARRETT AND TUCKER COUNTIES LATER THIS AFTERNOON.
THESE STORMS COULD BECOME SEVERE THIS AFTERNOON. STAY ALERT FOR
STRONG GUSTY WINDS, FREQUENT DANGEROUS LIGHTING, HEAVY DOWNPOURS
AND POSSIBLY LARGE HAIL.
STAY TUNED TO NOAA WEATHER RADIO FOR MORE UPDATE FROM YOUR NATIONAL
WEATHER SERVICE ON THESE STORMS.
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.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 PM EDT
THURSDAY EVENING FOR WESTERN MARYLAND AND SOUTHWESTERN PENNSYLVANIA
AND NORTHERN WEST VIRGINIA.
&&
LAT...LON 3915 7984 3922 7982 3930 7992 3945 7993
3938 8009 3947 8048 3943 8053 3944 8061
3947 8072 3959 8085 3957 8090 3960 8094
3955 8104 3958 8135 3963 8147 3958 8148
3957 8156 3975 8168 4018 7984 3910 7955The Pittsburgh radar (KPBZ), 87 km away, was scanning. The volume nearest the first event began at 16:00 UTC.
3 thunderstorm wind. Local standard time, as filed.
A trained spotter reported numerous trees uprooted or snapped off.
A county official reported 2 trees down near MCclellandtown.
A trained spotter reported trees and telephone ploes down near Belle Vernon.
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, June 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: 230680, 230681, 230682.