Hail and Strong Winds with Severe Thunderstorms - Aug 30, 2007
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Hail and Strong Winds with Severe Thunderstorms - Aug 30, 2007
Another round of severe weather hit Central Pennsylvania during the afternoon of August 30th, 2007 producing small hail and damaging winds across the area. Numerous trees and wires were brought down by thunderstorm winds across Clearfield and Huntingdon counties. In addition some storms produced nickel and pea-sized hail.

The storms were caused by a cold front that was moving across the region lifting warm, unstable air ahead of it. A maximized area of instability just ahead of the front in Central Pennsylvania fueled the storms. Some of these storms produced outflow boundaries that interacted with the northeast-to-southwest oriented cold front causing storms to redevelop from northeast to southwest as the front sliced through the area.

Below is a listing of the storm reports for this event.

000
NWUS51 KCTP 311437
LSRCTP

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1037 AM EDT FRI AUG 31 2007

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

0221 PM TSTM WND DMG 2 N KEENEYVILLE 41.89N 77.26W
08/30/2007 TIOGA PA EMERGENCY MNGR

TREE DOWN ACROSS CUMMINGS CREEK ROAD

0230 PM HAIL 4 NE DUBOIS 41.16N 78.70W
08/30/2007 E0.88 INCH CLEARFIELD PA BROADCAST MEDIA

NICKEL SIZE HAIL REPORTED IN SANDY TOWNSHIP NEAR TREASURE
LAKE.

0245 PM TSTM WND DMG 4 NE DUBOIS 41.16N 78.70W
08/30/2007 CLEARFIELD PA BROADCAST MEDIA

NUMEROUS TREES AND POWERLINES DOWN NEAR TREASURE LAKE IN
SANDY TOWNSHIP.

0250 PM HAIL 1 SE EMPORIUM 41.50N 78.22W
08/30/2007 E0.25 INCH CAMERON PA TRAINED SPOTTER

PEA SIZE HAIL ALONG ROUTE 120.

0315 PM HAIL 5 E CLEARFIELD 41.02N 78.34W
08/30/2007 E0.25 INCH CLEARFIELD PA NWS EMPLOYEE

PEA SIZE HAIL ALONG INTERSTATE 80 NEAR CLEARFIELD.

0320 PM TSTM WND DMG 3 NE DUBOIS 41.15N 78.71W
08/30/2007 CLEARFIELD PA EMERGENCY MNGR

NUMEROUS TREES DOWN AND FIVE HOMES DAMAGED IN SABULA.

0440 PM HAIL 4 W STATE COLLEGE 40.79N 77.93W
08/30/2007 E0.25 INCH CENTRE PA NWS EMPLOYEE

PEA SIZE HAIL IN STORMSTOWN.

0505 PM FLASH FLOOD 2 S BLOSSBURG 41.65N 77.07W
08/30/2007 TIOGA PA EMERGENCY MNGR

WATER COVERING THE NORTHBOUND LANE OF ROUTE 15 NEAR
BLOSSBURG.

0536 PM TSTM WND DMG WARRIORS MARK 40.70N 78.11W
08/30/2007 HUNTINGDON PA LAW ENFORCEMENT

TREES DOWN.

0600 PM HAIL WILLIAMSPORT 41.24N 77.02W
08/30/2007 E0.25 INCH LYCOMING PA TRAINED SPOTTER

PEA SIZE HAIL ALONG WITH 35-40 MPH GUSTS. ESTIMATED ONE
INCH OF RAIN IN ONE HOUR IN WILLIAMSPORT.


Storm Reports from the Storm Prediction Center
Storm Reports from the Storm Prediction Center

Surface analysis at 2:00 pm
Surface analysis at 2:00 pm

Sterling, VA sounding 8:00 pm August 31
Sterling, VA sounding 8:00 pm August 31

KCCX reflectivity and storm relative velocity 2:12 pm over Tioga county
KCCX reflectivity and storm relative velocity 2:12 pm over Tioga county

KCCX reflectivity and storm relative velocity 2:32 pm over Clearfield county
KCCX reflectivity and storm relative velocity 2:32 pm over Clearfield county

KCCX reflectivity and storm relative velocity 3:18 pm over Clearfield county
KCCX reflectivity and storm relative velocity 3:18 pm over Clearfield county

CAPE surface analysis loop showing high values just ahead of the front
CAPE surface analysis loop showing high values just ahead of the front

KCCX radar and velocity loop showing thunderstorm outflow boundaries interacting with surface front
KCCX radar and velocity loop showing thunderstorm outflow boundaries interacting with surface front

Visible satellite loop and lightning plot during the event
Visible satellite loop and lightning plot during the event


 
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Page Last Modified: 31 August 2007 19:30:48 UTC
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