Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 244, NWS State College, PA

August 9, 2007York County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Aug 9, 2007, 6:56 PM EDT for York County, Pennsylvania. It was in force for 64 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 9, 2007, 6:56 PM EDT (22:56 UTC)
Expired: Aug 9, 2007, 8:00 PM EDT
In force: 64 min
Issued by: NWS State College, PA
Area: Counties, with a storm outline in the text

County York County, PA

The radar

The Sterling radar (KLWX), 130 km from the middle of the area, began a volume at 22:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 10.9 hours before the alert went out and 74 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 30 J/kg
Mixed-layer CIN: -330 J/kg
Mixed-layer LCL: 1529 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS51 KCTP 092256
SVRCTP
PAC133-100000-
/O.NEW.KCTP.SV.W.0244.070809T2256Z-070810T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
656 PM EDT THU AUG 9 2007

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  YORK COUNTY IN SOUTH CENTRAL PENNSYLVANIA...

* UNTIL 800 PM EDT

* AT 652 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM VALLEY GREEN TO HANOVER...AND MOVING EAST AT 35 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  THOMASVILLE AROUND 700 PM EDT...
  WEIGELSTOWN AND SPRING GROVE AROUND 705 PM EDT...
  YORK AND MANCHESTER AROUND 710 PM EDT...
  JACOBUS AROUND 715 PM EDT...
  STONYBROOK AND SPRY AROUND 720 PM EDT...
  WRIGHTSVILLE AND WINDSOR AROUND 725 PM EDT...

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 240 AND 246...I-83 BETWEEN
MILE MARKERS 1 AND 39.

SEVERE THUNDERSTORMS CONTAIN DAMAGING WINDS 58 MPH OR STRONGER...OR 
HAIL THREE QUARTERS OF AN INCH OR LARGER. SEEK SHELTER INSIDE A 
STURDY LOCATION NOW.

PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1 8 7 7 6 3 3 6 7 7 2.

LAT...LON 3971 7668 3976 7700 3994 7697 4003 7703
      4017 7697 4017 7692 4020 7691 4023 7685
      4017 7674 4007 7666 4005 7654 3994 7646
      3991 7638 3981 7633 3979 7628 3972 7624
TIME...MOT...LOC 2256Z 281DEG 31KT 4019 7682 3984 7698

$$

FORECASTER: KF

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 9, 3:02 PM EDT, 3 hours 54 minutes earlier.

Area forecast discussion, Aug 9, 3:02 PM EDT, 3 hours 54 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
302 PM EDT THU AUG 9 2007

.SYNOPSIS...
A WAVE OF LOW PRESSURE WILL SPREAD MORE SHOWERS AND THUNDERSTORMS
INTO PENNSYLVANIA LATER TODAY AND INTO EARLY FRIDAY. THE SYSTEM
WILL MOVE EAST OF THE REGION FRIDAY ALLOWING DRIER AIR TO RETURN
FOR THE WEEKEND.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR SOUTHERN PA THROUGH
4PM ASSOCIATED WITH A LONG LIVED BOW ECHO THAT CAUSED SPORADIC
WIND DAMAGE AND HEAVY RAIN AS IT MOVED THRU. ADDITIONAL
CONVECTION HAS SPROUTED OVER OHIO AND THE LOWER LAKES IN ADVANCE
OF THE NEXT SURGE OF WARM/MOIST ADVECTION...AND THIS WILL CONTINUE
TO AFFECT THE REGION INTO THE OVERNIGHT. SHOULD BE A MUGGY WET
NIGHT WITH OCCASIONAL SHOWERS AND THUNDERSTORMS...SOME OF WHICH
COULD DROP HEAVY RAIN AS PWAT ANOMALIES SURGE INTO THE +2-3 STD
DEV ON THE NOSE OF A 25-30 KNOT WSW LOW LEVEL JET.

AS FAR AS SEVERE THREAT GOES...MODELS DO ALLOW FOR SOME RECOVERY
IN THE CAPE FIELDS THIS EVENING...BUT INSTABILITY WILL BE MARGINAL
FOR SUPPORT TO ORGANIZED SEVERE. MAIN THREAT WILL BE LOCALIZED
HEAVY RAIN AS HUGE DEWPOINT AIR FEEDS EASTWARD AHEAD OF THE LOW
AND FRONTAL SYSTEM. IF WE CAN GET SOME ORGANIZATION TO THE
STORMS...BOW ECHO STRAIGHT LINE WINDS WILL BE THE BIGGEST THREAT
INTO THE EVENING.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH 6 PM FRIDAY/...
MODELS AGREE IN THE SFC LOW MOVING EAST OF THE STATE
FRIDAY...ALLOWING DRIER AIR TO BEGIN MAKING INROADS. IT COULD BE
A MURKY START TO THE DAY AS WE WILL HAVE HAD PLENTY OF CONVECTION
CROSSING THE REGION OVERNIGHT...BUT THINGS SHUD BRIGHTEN MARKEDLY
FROM LATE MORNING ON AS A DRIER NW BEGINS TO FRESHEN.

DAY TIME HIGHS SHUD BE NEAR SEASONAL NORMS WITH JUST THE CHANCE OF
A FEW LEFT OVER SHOWERS.

&&

.LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/...
WILL SEND ZONES HERE SHORTLY...WATCHING INTENSE STORMS OVER SW
PA...AND SEEING WHAT PLANS SPC HAVE. CURRENT WATCH GOES TO 4 PM.

ESTIMATED VIL IN THE MID 60S...TOPS OVER 60K FT...HEAVIEST STORMS
LIKELY IN PA TONIGHT INTO EARLY FRIDAY AM. MODELS FASTER NOW...SO
LOWER POPS FOR FRIDAY AFT AND TOOK OUT FOR FRIDAY NIGHT. DID NOT
WANT TO CUT FRIDAY AFT OUT...GIVEN LARGE DIFFERENCES TO MODEL
SOLUTIONS LATELY. MODELS HAVE BEEN TOO FAR NORTH WITH HEAIVEST QPF
LATELY...AS AN EXAMPLE.

ANYWAY...WEEKEND DOES NOT LOOK BAD...LOWER DEWPOINTS. SUNDAY WILL
START TO WARM UP AGAIN...BUT NEXT FRONT A SHADE FASTER NOW...SO
BROUGH POPS SOUTHWARD TO MD BORDER MONDAY.

LEFT TUE INTO THU DRY. PERHAPS ANOTHER WEEK FRONT...BUT HUGE
DIFFERENCES BETWEEN 06Z AND 12Z GFS...SO A LOT COULD CHANGE BY
THEN...AND PLENTY OF WEATHER CONCERNS IN THE SHORT TERM.

&&

.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
ANOTHER NIGHT OF FREQUENT SHOWERS AND THUNDERSTORMS ALONG WITH
MVFR/IFR CONDITIONS ASSOCIATED WITH THE RAINS. WILL PROBABLY SEE
MVFR VIZ PROBLEMS DEVELOP AS SHOWERS BEGIN TO INVADE BEFORE THE
DAY IS OVER...AND CONDITIONS WILL CONTINUE TO DETERIORATE AS THE
NIGHT PROGRESSES AS OCCASIONAL SHOWERS AND HEAVY THUNDERSTORMS
TRACK EAST.

CONDITIONS WILL START OFF RATHER MURKY FRIDAY BEFORE THE LOW AND
FRONT MOVE EAST OF THE STATE ALLOW FOR A DRIER NW FLOW TO
ESTABLISH. MOST TERMINALS WILL RETURN TO VFR BY AFTERNOON.

THE WEEKEND WILL BE DRY AND FAIR WITH LOWER HUMIDITY. IT LOOKS
LIKE THE NEXT CHANCE OF LOWERING CONDITIONS AND INCLEMENT WEATHER
WILL BE LATER SUNDAY NIGHT INTO EARLY NEXT WEEK AS ANOTHER FRONT
MAKES A RUN AT THE REGION

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

SYNOPSIS...LACORTE
NEAR TERM...LACORTE
SHORT TERM...LACORTE
LONG TERM...MARTIN
AVIATION...LACORTE

Hazardous weather outlook, Aug 9, 11:54 AM EDT, 7 hours 2 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1154 AM EDT THU AUG 9 2007

PAZ017>019-024>028-033>036-050-056-057-059-063>066-101600-
CLEARFIELD-NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-
MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-SNYDER-PERRY-
DAUPHIN-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER-
1154 AM EDT THU AUG 9 2007

...SEVERE THUNDERSTORM WATCH 573 IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   SEVERE THUNDERSTORM WATCH.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

PAZ004>006-010>012-037-041-042-045-046-049-051>053-058-101600-
WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-TIOGA-
NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-
MONTOUR-NORTHUMBERLAND-COLUMBIA-SCHUYLKILL-
1154 AM EDT THU AUG 9 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

LOCALIZED VERY HEAVY RAIN OF OVER 2 INCHES IN JUST A FEW HOURS IS
POSSIBLE WHERE SEVERAL THUNDERSTORMS MOVE ACROSS THE SAME AREA.
SCATTERED STRONG THUNDERSTORMS WILL MOVE EAST ACROSS THE REGION
THIS AFTERNOON AND TONIGHT...BUT THE PROBABILITY FOR DAMAGING WIND
GUSTS AND LARGE HAIL WILL BE LOW.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED.

In the hours before

Local storm report, Aug 9, 4:45 PM EDT, 2 hours 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
445 PM EDT THU AUG 09 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0407 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   TRAINED SPOTTER

            SPOTTER REPORTED TREES DOWN ON SAINTE CLAIRE ROAD.
            SPOTTER RELAYED HAM RADIO REPORT OF FUNNEL CLOUD NEAR JCT
            OF RTE 30 AND 219 IN SOMERSET.

0420 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   BROADCAST MEDIA

            TV METEOROLOGIST REPORTED TREES DOWN IN THE WESTMONT AREA
            OF JOHNSTOWN. RELAYED REPORT OF FUNNEL CLOUD IN THE
            JEROME DAVIDVILLE AREA OF SOMERSET.

0420 PM     TSTM WND DMG     SOMERSET                40.01N 79.08W
08/09/2007                   SOMERSET           PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN IN THE NORTH CENTRAL PART
            OF SOMERSET COUNTY. ALSO NUMEROUS REPORTS OF TREES DOWN
            COUNTYWIDE.

&&

MACH

Special weather statement, Aug 9, 4:49 PM EDT, 2 hours 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
449 PM EDT THU AUG 9 2007

PAZ026>028-035-036-056-092145-
FRANKLIN-FULTON-HUNTINGDON-JUNIATA-MIFFLIN-PERRY-
449 PM EDT THU AUG 9 2007

...STRONG THUNDERSTORMS WILL AFFECT FULTON...HUNTINGDON...
NORTHWESTERN FRANKLIN...SOUTHWESTERN JUNIATA...SOUTHWESTERN MIFFLIN
AND SOUTHWESTERN PERRY COUNTIES...

AT 442 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM ALTOONA TO 10 MILES
NORTH OF BEDFORD TO 15 MILES NORTH OF CUMBERLAND...MOVING EAST AT 40
MPH.

WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STORMS.

THESE STORMS WILL BE NEAR SHY BEAVER AROUND 500 PM...ALEXANDRIA...
TROUGH CREEK STATE PARK...MARKLESBURG...ENTRIKEN AROUND 505 PM...
PETERSBURG...WELLS TANNERY...TROUGH CREEK STATE PARK...HUNTINGDON
AROUND 510 PM AND VALLEY-HI AROUND 515 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 165 AND 200...I-70 BETWEEN
MILE MARKERS 151 AND 165.

FORECASTER: RG

Local storm report, Aug 9, 5:22 PM EDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
522 PM EDT THU AUG 09 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0407 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   TRAINED SPOTTER

            SPOTTER REPORTED TREES DOWN ON SAINTE CLAIRE ROAD.
            SPOTTER RELAYED HAM RADIO REPORT OF FUNNEL CLOUD NEAR JCT
            OF RTE 30 AND 219 IN SOMERSET.

0420 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   BROADCAST MEDIA

            TV METEOROLOGIST REPORTED TREES DOWN IN THE WESTMONT AREA
            OF JOHNSTOWN. RELAYED REPORT OF FUNNEL CLOUD IN THE
            JEROME DAVIDVILLE AREA OF SOMERSET.

0420 PM     TSTM WND DMG     SOMERSET                40.01N 79.08W
08/09/2007                   SOMERSET           PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN IN THE NORTH CENTRAL PART
            OF SOMERSET COUNTY. ALSO NUMEROUS REPORTS OF TREES DOWN
            COUNTYWIDE.

0500 PM     TSTM WND DMG     HOLLIDAYSBURG           40.43N 78.39W
08/09/2007                   BLAIR              PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES AND WIRES DOWN AT NUMEROUS
            LOCATIONS THROUGHOUT BLAIR COUNTY. 911 CENTER WAS ALSO
            TAKING MANY REPORTS OF PONDED ROADWAYS.

0503 PM     TSTM WND DMG     SCHELLSBURG             40.05N 78.64W
08/09/2007                   BEDFORD            PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN ON ROADS.

&&

MACH

Local storm report, Aug 9, 5:58 PM EDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
558 PM EDT THU AUG 09 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0407 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   TRAINED SPOTTER

            SPOTTER REPORTED TREES DOWN ON SAINTE CLAIRE ROAD.
            SPOTTER RELAYED HAM RADIO REPORT OF FUNNEL CLOUD NEAR JCT
            OF RTE 30 AND 219 IN SOMERSET.

0420 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   BROADCAST MEDIA

            TV METEOROLOGIST REPORTED TREES DOWN IN THE WESTMONT AREA
            OF JOHNSTOWN. RELAYED REPORT OF FUNNEL CLOUD IN THE
            JEROME DAVIDVILLE AREA OF SOMERSET.

0420 PM     TSTM WND DMG     SOMERSET                40.01N 79.08W
08/09/2007                   SOMERSET           PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN IN THE NORTH CENTRAL PART
            OF SOMERSET COUNTY. ALSO NUMEROUS REPORTS OF TREES DOWN
            COUNTYWIDE.

0500 PM     TSTM WND DMG     HOLLIDAYSBURG           40.43N 78.39W
08/09/2007                   BLAIR              PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES AND WIRES DOWN AT NUMEROUS
            LOCATIONS THROUGHOUT BLAIR COUNTY. 911 CENTER WAS ALSO
            TAKING MANY REPORTS OF PONDED ROADWAYS.

0503 PM     TSTM WND DMG     SCHELLSBURG             40.05N 78.64W
08/09/2007                   BEDFORD            PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN ON ROADS.

0532 PM     TSTM WND DMG     8 SW CASSVILLE          40.21N 78.14W
08/09/2007                   HUNTINGDON         PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN.

&&

MACH

Local storm report, Aug 9, 6:39 PM EDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
639 PM EDT THU AUG 09 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0407 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   TRAINED SPOTTER

            SPOTTER REPORTED TREES DOWN ON SAINTE CLAIRE ROAD.
            SPOTTER RELAYED HAM RADIO REPORT OF FUNNEL CLOUD NEAR JCT
            OF RTE 30 AND 219 IN SOMERSET.

0420 PM     TSTM WND DMG     JOHNSTOWN               40.33N 78.92W
08/09/2007                   CAMBRIA            PA   BROADCAST MEDIA

            TV METEOROLOGIST REPORTED TREES DOWN IN THE WESTMONT AREA
            OF JOHNSTOWN. RELAYED REPORT OF FUNNEL CLOUD IN THE
            JEROME DAVIDVILLE AREA OF SOMERSET.

0420 PM     TSTM WND DMG     SOMERSET                40.01N 79.08W
08/09/2007                   SOMERSET           PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN IN THE NORTH CENTRAL PART
            OF SOMERSET COUNTY. ALSO NUMEROUS REPORTS OF TREES DOWN
            COUNTYWIDE.

0500 PM     TSTM WND DMG     HOLLIDAYSBURG           40.43N 78.39W
08/09/2007                   BLAIR              PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES AND WIRES DOWN AT NUMEROUS
            LOCATIONS THROUGHOUT BLAIR COUNTY. 911 CENTER WAS ALSO
            TAKING MANY REPORTS OF PONDED ROADWAYS.

0503 PM     TSTM WND DMG     SCHELLSBURG             40.05N 78.64W
08/09/2007                   BEDFORD            PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN ON ROADS.

0532 PM     TSTM WND DMG     8 SW CASSVILLE          40.21N 78.14W
08/09/2007                   HUNTINGDON         PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN.

0615 PM     TSTM WND DMG     UPPER STRASBURG         40.02N 77.70W
08/09/2007                   FRANKLIN           PA   COUNTY OFFICIAL

            911 CENTER REPORTED TREES DOWN.

&&

MACH

Special weather statement, Aug 9, 6:42 PM EDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
642 PM EDT THU AUG 9 2007

PAZ057-065-066-092330-
DAUPHIN-LANCASTER-YORK-
642 PM EDT THU AUG 9 2007

...STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN LANCASTER...SOUTHERN
DAUPHIN AND YORK COUNTIES...

AT 635 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 2 MILES NORTHWEST OF
MECHANICSBURG TO 4 MILES NORTHWEST OF EMMITSBURG...MOVING EAST AT 35
MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

THESE STORMS WILL BE NEAR PROGRESS AROUND 650
PM...STEELTON...COLONIAL PARK...WELLSVILLE AND LEWISBERRY AROUND 655
PM...CLIFTON...RUTHERFORD HEIGHTS...VALLEY GREEN AND MIDDLETOWN
AROUND 700 PM AND WEIGELSTOWN AROUND 705 PM.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 240 AND 278...I-83 BETWEEN
MILE MARKERS 1 AND 49...ALL OF I-283.

FORECASTER: KF

The office that day

Everything else NWS State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 8:47 AM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	58 min
Aug 9, 9:29 AM EDT	Severe Thunderstorm Warning	CTP	Bedford, Blair	61 min
Aug 9, 9:37 AM EDT	Flash Flood Warning	CTP	Cambria	4 hr
Aug 9, 9:43 AM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	32 min
Aug 9, 10:08 AM EDT	Severe Thunderstorm Warning	CTP	Fulton, Huntingdon	67 min
Aug 9, 10:33 AM EDT	Severe Thunderstorm Warning	CTP	Bedford	27 min
Aug 9, 10:38 AM EDT	Severe Thunderstorm Warning	CTP	Franklin	67 min
Aug 9, 10:51 AM EDT	Severe Thunderstorm Warning	CTP	Cumberland, Perry	54 min
Aug 9, 11:28 AM EDT	Severe Thunderstorm Warning	CTP	Adams	47 min
Aug 9, 3:47 PM EDT	Severe Thunderstorm Warning	CTP	Cambria, Somerset	58 min
Aug 9, 4:24 PM EDT	Severe Thunderstorm Warning	CTP	Bedford	66 min
Aug 9, 4:30 PM EDT	Severe Thunderstorm Warning	CTP	Blair	60 min
Aug 9, 4:58 PM EDT	Severe Thunderstorm Warning	CTP	Huntingdon	62 min
Aug 9, 5:16 PM EDT	Severe Thunderstorm Warning	CTP	Fulton	59 min
Aug 9, 5:31 PM EDT	Severe Thunderstorm Warning	CTP	Franklin	59 min
Aug 9, 5:53 PM EDT	Severe Thunderstorm Warning	CTP	Cumberland	52 min
Aug 9, 6:22 PM EDT	Severe Thunderstorm Warning	CTP	Adams	38 min

Nearby

Severe Thunderstorm Warnings in Pennsylvania, 2007 Every severe thunderstorm warning in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.