Widespread thunderstorms affected central Pennsylvania during the afternoon and evening of June 1, 2007. Some of these thunderstorms developed into pulse severe storms, causing large hail and isolated reports of damage.
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.
Widespread thunderstorms affected central Pennsylvania during the afternoon and evening of June 1, 2007. Some of these thunderstorms developed into pulse severe storms, causing large hail and isolated reports of damage.
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 1, 10:29 AM EST, 3 hours 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1129 AM EDT FRI JUN 1 2007 .SYNOPSIS... HIGH PRESSURE OFF THE NORTH CAROLINA COAST IS PROVIDING A HOT AND HUMID FLOW OF AIR INTO THE REGION FROM THE SOUTH AND WEST. THIS AIRMASS WILL CHANGE LITTLE TODAY OR SATURDAY. A COLD FRONT WILL TRY TO ADVANCE INTO THE REGION BY MONDAY...BUT A DEVELOPING TROPICAL SYSTEM NEAR CUBA MAY BE DIRECTED UP THE EASTERN SEABOARD THIS WEEKEND AND COULD ACT TO SLOW THE PROGRESSION OF THAT FRONT...AND COULD DIRECTLY INFLUENCE THE WEATHER OVER THE STATE...ESPECIALLY THE EASTERN HALF OF THE COMMONWEALTH. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... A DAY ALMOST IDENTICAL TO YESTERDAY. HAZY WARM AND HUMID WITH DIURNAL CONVECTION A GOOD BET. A FEW OF THE PULSERS YESTERDAY CAUSED GUSTY WINDS AND HAIL...SEE NO REASON THAT THE SAME POTENTIAL WILL EXIST TODAY. RUC ANAL SHOWS 500-1500J OF CAPE AND STEADILY ERODING CIN. OBSERVED SOUNDING SHOWS A BIT MORE MOISTURE THAN YESTERDAY SO NOT AS MUCH EFFORT SHOULD BE EXPENDED CONDITIONING THE ATMOSPHERE. BUFKIT FCST SOUNDINGS SHOW MORE CAPE AND MOISTER PROFILES AS WELL. THIS MAY DECREASE THE POTENTIAL FOR MICROBURSTS SINCE WE WILL HAVE LESS DRY AIR TO AID IN EVAPORATIVE COOLING OF THE DOWNDRAFTS. BUT STILL NOT BEING TERRIBLY WARM ALOFT...THE POTENTIAL FOR HAIL WILL BE THERE IN SOME OF THE STRONGER UPDRAFTS. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/... VERY SIMILAR SITUATION THIS AFTERNOON AND EVENING AS YESTERDAY. DIURNAL PULSE TYPE CONVECTION SHOULD FIRE UP FIRST ALONG THE RIDGETOPS DURING THE EARLY AFTN...TENDING TO DRIFT EASTWARD IN THE WEAK MEAN 0-6KM FLOW. CAPES IN THE 1500-2500J RANGE AND VERY LITTLE SHEAR SUGGEST SLOW-MOVING PULSERS WITH A RISK OF ISOLATED SVR. MAX TEMPS SHOULD NOT GET TO THE RECORDS WE SET YESTERDAY...AS THEY WILL PROBABLY BE CUT DOWN JUST A HAIR BY THE MID CLOUD DEBRIS OVERHEAD NOW. BUT 8H TEMPS STILL VERY WARM /+16C/...SO WE SHOULD STILL GET SEVERAL DEGREES ABOVE NORMAL...AND MAY TOUCH 90 IN A COUPLE OF SPOTS. THE DIURNAL CONVECTION SHOULD AGAIN WANE AFTER SUNSET THIS EVENING...BUT HIGH CAPES AND PWATS COULD LET THEM LAST THROUGH MIDNIGHT/1 AM AGAIN. BROKEN RECORD SKIPS ALONG ON SATURDAY...WITH SIMILAR TEMPS. WE MAY A LITTLE LESS DIURNAL CONVECTION DUE TO THE SLIGHT NVA WE WILL BE UNDER ALOFT DURING PEAK HEATING DUE TO A SLIGHT INCREASE IN NWRLY FLOW AT UPPER LEVELS OFF TO OUR NE. THIS WOULD PUT US IN THE UNFAVORABLE RIGHT EXIT REGION...BUT A WEAK CAP AND STILL-HIGH MOISTURE CAN STILL PROVIDE FIREWORKS...EVEN IF WE NEED A SLIGHTLY BIGGER SPARK/LIFT TO START THEM. HAVE LOWERED POPS ONLY SLIGHTLY TO JUST BELOW 30 PCT AND CONFINED THEM TO THE AFTN HRS ON SAT DUE TO THESE CONSIDERATIONS. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... CARRIED 20 POPS AFT 8 PM ON SAT NIGHT...WITH LEFTOVER DIURNAL STUFF FROM SAT AFTN/EVENING IN MIND. HOWEVER...MAIN WORRY FOR THE LATE WEEKEND AND MON/TUES IS HOW THE +UPPER LOW MOVING EAST FROM THE NORTHERN PLAINS... +ENERGY FROM EASTERN CANADA...AND +THE POSSIBLE TROPICAL SYSTEM COMING OUT OF THE GULF ALL INTERACT. FOR NOW...WEIGHTED FORECAST TO WHAT WE HAD...AND TO THE MILD AND WET SIDE. NAM MAY NOT DO THE BEST WITH SE SYSTEM - IT SEEMS WELL TO THE WEST OF ALL OTHER SOLUTIONS...WHILE A MODEL LIKE THE GFS MAY DO A LITTLE BETTER. HOWEVER...A WAYS OUT...AND MODELS HAVE BEEN DIFFERENT EACH DAY. FOR NOW...TAPERED POPS TO LESS THAN 15 BY MID WEEK. GFS MAY BE A SHADE TOO FAST WITH SYSTEM. HARD TO TRUST ANYTHING...WITH 3 SYSTEMS TRYING TO INTERACT/PHASE. AIRMASS IN EASTERN CANADA WAS ABNORMALLY COLD THE OTHER MORNING. && .AVIATION /15Z FRIDAY THROUGH TUESDAY/... THE ONLY AIRFIELD THAT RECEIVED A NON TRIVIAL AMOUNT OF PRECIPITATION WITH YESTERDAYS CONVECTION WAS KUNV. AS SUCH...CEILINGS AND VISIBILITIES HAVE DROPPED INTO THE LIFR CATEGORY. EXPECT THAT DISSIPATE BY 14Z. OTHER AIRFIELDS REMAIN IN IFR OR MVFR CATEGORY DUE TO BR AND THIS WILL IMPROVE THROUGH THE MORNING AS WELL. CONDITIONS THROUGH 00Z/SAT WILL BE SIMILAR TO YESTERDAY AS SCATTERED CONVECTION WILL DEVELOP ACROSS THE AREA. COVERAGE WILL BE LESS THAN 50 PERCENT AND THE LIKELIHOOD THAT CONVECTION WILL OCCUR OVER THE FIVE MILE RING OF ANY PARTICULAR AIRFIELD IS DIFFICULT TO DETERMINE. SO FAR JUST PLACED CB IN THE TAF BUT ANY AIRFIELD COULD SEE CONVECTION AFTER 18Z AND DIMINISHING AFTER 01Z. SHOWERS AND THUNDERSHOWERS WILL STAY IN THE FORECAST THROUGH MID WEEK AS AN UPPER LEVEL TROUGH REPLACES OUR CURRENT RIDGE. THIS WILL KEEP THE AREA UNSETTLED BUT NOT A WASHOUT. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...DANGELO NEAR TERM...LACORTE SHORT TERM...DANGELO LONG TERM...DANGELO/MARTIN AVIATION...TYBURSKI
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 324 AM EDT FRI JUN 1 2007 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-020730- WARREN-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- 324 AM EDT FRI JUN 1 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON AND EVENING. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. DANGELO
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
948 AM EDT FRI JUN 01 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0415 PM TSTM WND DMG STATE COLLEGE 40.79N 77.86W
05/31/2007 CENTRE PA EMERGENCY MNGR
TREES DOWN.
0655 PM HAIL LEWISTOWN 40.60N 77.57W
05/31/2007 E1.00 INCH MIFFLIN PA TRAINED SPOTTER
SEVERAL LARGE TREE LIMBS DOWN
0825 PM TSTM WND DMG MCALEVYS FORT 40.64N 77.82W
05/31/2007 HUNTINGDON PA DEPT OF HIGHWAYS
SEVERAL TREES DOWN ON ROUTE 305
&&
JJLSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 111 PM EDT FRI JUN 1 2007 PAZ037-011815- TIOGA- 111 PM EDT FRI JUN 1 2007 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL TIOGA COUNTY... AT 101 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES NORTHWEST OF WELLSBORO. THIS STORM IS NEARLY STATIONARY. THE THUNDERSTORM WILL STAY OVER MAINLY RURAL AREAS OF CENTRAL TIOGA COUNTY. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. FORECASTER: LA CORTE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 139 PM EDT FRI JUN 1 2007 PAZ024-025-011830- BLAIR-CAMBRIA- 139 PM EDT FRI JUN 1 2007 ...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL CAMBRIA AND SOUTHWESTERN BLAIR COUNTIES... AT 136 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 9 MILES SOUTH OF PORTAGE...MOVING NORTHEAST AT 10 MPH. THE THUNDERSTORM WILL BE NEAR SPRING HILL AROUND 155 PM...SKI GAP AND CLAYSBURG AROUND 200 PM. THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES... I-99 BETWEEN MILE MARKERS 16 AND 28. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. FORECASTER: LA CORTE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 217 PM EDT FRI JUN 1 2007 PAZ034-011845- BEDFORD- 217 PM EDT FRI JUN 1 2007 ...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BEDFORD COUNTY... AT 213 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 8 MILES SOUTHEAST OF WINDBER...MOVING NORTHEAST AT 5 MPH. WIND GUSTS TO 40 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. EXPECT INTENSE LIGHTNING FROM THIS STORM. DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. THIS STORM WILL BE NEAR BLUE KNOB STATE PARK AROUND 245 PM. FORECASTER: STEINBUGL
The State College radar (KCCX), 24 km away, was scanning. The volume nearest the first event began at 19:00 UTC.
11 thunderstorm wind, 4 hail, 1 lightning. Local standard time, as filed.
Trained spotter reported quarter size hail partially covering the ground about one mile south of Osceola Mills.
Severe thunderstorms produced walnut size hail on Spike Island.
Several trees were reported down in New Millport Township, about 3 miles southeast of Lumber City.
Thunderstorms produced quarter size hail in East Prospect.
Thunderstorm winds knocked down trees in East Prospect. Also, the a significant portion of roofing of a single story home was torn off.
Thunderstorm winds knocked down several trees.
Thunderstorm winds knocked down several large tree limbs.
Thunderstorm winds knocked down several large tree limbs.
Thunderstorm winds knocked down several trees along East Broad and Race Streets in Tamaqua.
Thunderstorms produced quarter size hail in Lawn.
Thunderstorm winds knocked down several trees and wires throughout Warwick Township.
Thunderstorm winds knocked down several trees and power lines.
Lightning struck a home, and injured two individuals inside.
Thunderstorm winds knocked down numerous trees and wires in Washington Township.
Thunderstorm winds knocked down trees and wires.
Thunderstorm winds knocked down several trees and wires.
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, June 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: 24633, 24634, 24637, 24635, 24638, 24639, 24640, 24641, 24642, 24636, 24643, 24644, 24648, 24645, 24646, 24647.