A deep upper level low over southern Ontario and associated cold temperatures aloft contributed to scattered to numerous severe thunderstorms during the afternoon and evening across central Pennsylvania. Several reports of large hail were observed during this event.
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 CTP wrote it up.
A deep upper level low over southern Ontario and associated cold temperatures aloft contributed to scattered to numerous severe thunderstorms during the afternoon and evening across central Pennsylvania. Several reports of large hail were observed during this event.
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 State College, PA wrote its last area forecast discussion before the first event at Jun 26, 12:43 PM EST, 6 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 143 PM EDT FRI JUN 26 2009 .SYNOPSIS... SCATTERED SHOWERS AND THUNDERSTORMS...SOME LOCALLY SEVERE...WILL TRACK SOUTHEAST OF THE AREA EARLY TONIGHT ALONG WITH A COLD FRONT. HIGH PRESSURE WILL BUILD IN FROM THE MIDWEST LATER TONIGHT AND SATURDAY BRINGING FAIR AND WARM WEATHER. ANOTHER COLD FRONT WILL LIKELY PUSH THROUGH PENNSYLVANIA ON SUNDAY WITH SCATTERED...MAINLY AFTERNOON SHOWERS. && .NEAR TERM /UNTIL 11 PM THIS EVENING/... SUBSIDENCE-INDUCED STRATUS DECK FROM THIS MORNING IS STILL HANGING TOUGH FROM SOUTHERN PORTIONS OF THE NORTHWEST MOUNTAINS SOUTHWARD THROUGH THE LAUREL HIGHLANDS. CONVECTION FIRING ALONG AND NORTH OF THE NY BORDER JUST AHEAD OF SFC COLD FRONT AND WITHIN AREA OF GREATEST UPPER LEVEL DIVERGENCE AND SPEED SHEAR. ADDITIONAL CELLS TRYING TO FIRE IN THE UNSTABLE BUT LESS SHEARED ENVIRONMENT OVER THE MIDDLE TO LOWER SUSQUEHANNA RIVER VALLEY. ASIDE FROM MY EXTREME NORTH AND NORTHEAST AREAS...THE CENTRAL MOUNTAINS AND SOUTHEAST APPEAR TO HAVE THE GREATEST THREAT FOR STRONG TO LOCALLY SEVERE DOWNDRAFTS. SEVERE HAIL APPEARS TO BE MOST LIKELY NEAR THE NY BORDER. ACTIVITY SHOULD WIND DOWN AROUND OR JUST AFTER SUNSET IN THE SOUTHEAST FOLLOWED BY QUIETER WEATHER FOR THE OVERNIGHT AS NOTICEABLY DRIER AIR ADVECTS SOUTHEASTWARD ACROSS THE LAKES. && .SHORT TERM /11 PM THIS EVENING THROUGH 6 PM SATURDAY/... 500MB TROUGH AXIS STEADILY SLIDES EAST SAT...WITH A SECONDARY STRONG LOBE OF VORTICITY PROGGED TO PIVOT AROUND SW QUADRANT SAT MORNING. UNSEASONABLY COOL 850 MB TEMPS WILL CONT TO ADVECT SOUTHWARD AROUND THE INTENSE UPPER LOW CIRCULATION CENTERED OVER SOUTHERN NEW ENGLAND AND CANNOT ENTIRELY RULE OUT A BRIEF SHOWER MAINLY OVER EASTERN SECTIONS WHERE LAPSE RATES ARE STEEPEST. CURRENTLY HAVE LEFT THE MENTION OUT IN THE GRIDS AND TEXT PRODUCTS. MAX TEMPS SATURDAY WILL BE MAINLY IN THE UPPER 70S ACROSS THE MTNS...AND LOWER TO MID 80S IN THE CENTRAL VALLEYS THROUGH THE SUSQUEHANNA RIVER VALLEY. && .LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/... WEAK RIDGING SAT NGT WILL BE DEFLECTED EAST...AS FRONTAL BNDRY APPROACHES FROM WEST SUN. THETA-E RIDGE POKES EAST SUN AHEAD OF FRONTAL BNDRY...THUS HAVE MAINTAINED CHC SHRA/TSRA. RIDGE CENTERED OFF NEW ENGLAND COAST IS POISED TO SLOW EASTWARD PROGRESSION OF 500MB SHORTWAVE. THIS APPEARS TO BE GAINING CONFIDENCE...AND BRINGS A WEAK NW FLOW REGIME BACK INTO MID-ATLANTIC REGION EARLY NEXT WEEK. THIS SCENARIO SUGGESTS TEMPS WILL BE A BIT BLW NORMAL THRU THE PERIOD WITH A CHC OF DIURNAL CONVECTION...ESP OVR THE ELEVATED TERRAIN OF THE ALLEGHENIES. && .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/... LINE OF THUNDERSTORMS ORGANIZING ALONG THE PA NY BORDER WILL DROP SOUTH ACROSS THE FORECAST AREA. INTIALLY PUT IN VCTS FOR A THREE TO FOUR HOUR PERIOD THIS AFTERNOON BUT WILL ADD SPECIFICS AS STORMS MOVE TOWARD ANY PARTICULAR AIRFIELD. SCT -SHRA DEVELOPING OVER THE SOUTHERN AREA SO THE SHORT TERM FORECASTS ALL INCLUDE AT LEAST VCSH. ALL AREAS SHOULD BE CLEAR OF CONVECTION BY 27/00Z. POSSIBLY PATCHY FOG OVERNIGHT WITH RESIDUAL MOISTURE BEFORE 27/12Z. OUTLOOK... SAT...VFR. SUN...VFR...THEN MVFR IN NMRS SHRA/TS AFTN/EVE. MON/TUE...MAINLY VFR...MVFR PSBL IN SCT AFTN SHRA/TS. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...DEVOIR NEAR TERM...DEVOIR SHORT TERM...DEVOIR LONG TERM...LAMBERT/BEACHLER AVIATION...MARTIN/TYBURSKI
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 513 AM EDT FRI JUN 26 2009 PAZ004-270915- WARREN- 513 AM EDT FRI JUN 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. A COLD FRONT WILL PUSH SOUTHEAST ACROSS THE REGION EARLY THIS AFTERNOON...TRIGGERING SCATTERED STRONG THUNDERSTORMS. BRIEF WIND GUSTS OF 35 TO 45 MPH...AND HAIL UP TO ONE HALF OF AN INCH IN DIAMETER ARE POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ005-006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-270915- MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN- JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING- SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR- NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND- ADAMS-YORK-LANCASTER- 513 AM EDT FRI JUN 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EARLY THIS EVENING... A COLD FRONT WILL PUSH SOUTHEAST ACROSS THE REGION THIS AFTERNOON...TRIGGERING SCATTERED STRONG TO SEVERE THUNDERSTORMS. THE MAIN SEVERE WEATHER THREAT FROM THESE STORMS WILL BE IN THE FORM OF STRONG AND POSSIBLY DAMAGING...DOWN BURST WIND GUSTS AND LARGE HAIL UP TO ONE INCH IN DIAMETER. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON INTO EARLY THIS EVENING. LAMBERT
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1254 PM EDT FRI JUN 26 2009
PAZ006-037-261730-
POTTER PA-TIOGA PA-
1254 PM EDT FRI JUN 26 2009
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN POTTER AND
NORTHERN TIOGA COUNTIES...
AT 1253 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR ULYSSES...
MOVING EAST AT 30 MPH.
WIND GUSTS TO 40 MPH AND PEA-SIZED HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
THIS STORM WILL BE NEAR WESTFIELD AROUND 105 PM...GAINES AROUND 110
PM...KNOXVILLE AROUND 115 PM AND KEENEYVILLE AROUND 130 PM.
THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 15.
LAT...LON 4167 7713 4177 7779 4200 7763 4201 7730
4200 7711
EXPERIMENTAL
FORECASTER: DANGELOSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
121 PM EDT FRI JUN 26 2009
PAZ037-261745-
TIOGA PA-
121 PM EDT FRI JUN 26 2009
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN TIOGA COUNTY...
AT 120 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 11 MILES NORTH OF
MANSFIELD...MOVING EAST AT 25 MPH.
WIND GUSTS TO 30 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO
POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS.
THIS STORM WILL BE NEAR MILLERTON AROUND 135 PM AND ROSEVILLE AROUND
140 PM.
THIS WILL IMPACT ROUTE 15.
LAT...LON 4199 7692 4183 7690 4182 7691 4196 7728
4201 7722 4201 7694
EXPERIMENTAL
FORECASTER: DANGELOSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 129 PM EDT FRI JUN 26 2009 PAZ037-261800- TIOGA PA- 129 PM EDT FRI JUN 26 2009 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TIOGA COUNTY... AT 127 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR WELLSBORO... MOVING EAST AT 25 MPH. WIND GUSTS TO 40 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. THIS STORM WILL BE JUST NORTH OF WELLSBORO AROUND 135 PM...NEAR MANSFIELD AROUND 155 PM AND NEAR COVINGTON AROUND 200 PM. ANOTHER STORM IS JUST TO THE EAST OF THIS STORM...JUST TO THE WEST OF MANSFILED...AND COULD ALSO MAKE SMALL HAIL AND GUSTY WINDS. THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6 FROM WEST OF WELLSBORO TO THE BRADFORD COUNTY LINE...ROUTE 15 FROM BLOSSBURG TO MANSFIELD. LAT...LON 4164 7688 4176 7746 4185 7741 4186 7691 EXPERIMENTAL FORECASTER: DANGELO
The State College radar (KCCX), 112 km away, was scanning. The volume nearest the first event began at 17:49 UTC.
11 hail, 4 thunderstorm wind. Local standard time, as filed.
Quarter size hail was reported near Wellsboro. Thunderstorm winds were estimated between 50 and 60 mph.
Two-inch diameter hail covered the ground in Cherry Flats. The hail shattered several car windshields.
Golf ball size hail was reported near Wellsboro.
Two-inch diameter hail was observed near Covington.
Half dollar size hail was reported in Morris Run just east of Blossburg.
Half dollar size hail was reported near Lyman Run State Park.
Thunderstorm winds estimated near 60 mph knocked down trees between Lincoln Falls and Hillsgrove just west of Forksville.
Nickel size hail was reported near Forksville.
Thunderstorm winds estimated near 60 mph knocked down trees near Dillsburg.
Thunderstorm winds estimated near 60 mph knocked down trees and wires near Dover.
Nickel size hail was reported east of Dover.
Nickel size hail was reported along Interstate 83 near Glen Rock.
Nickel size hail was reported near New Freedom.
Penny size hail was reported near Shrewsbury.
Thunderstorm winds estimated near 60 mph knocked down trees near New Bloomfield.
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, June 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: 168772, 168777, 168773, 168774, 168775, 168776, 168786, 168782, 168783, 168784, 168778, 168781, 168780, 168779, 168785.