Severe Weather of 9 August 2009
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Severe Weather of 9 August 2009
See Radar Images Below...
A cluster of thunderstorms developed over Lower Ontario and moved across Lake Erie into western New York State early Sunday afternoon (9 Aug 2009). These storms made lots of wind damage as they moved eastward through Buffalo, and surrounding areas. These storms then made a turn to the south, and into Northern PA.

The storms were mainly one large long-lived bow echo (sometimes called a derecho), and one lone rotating cell lagging behind at the far western end of the bow echo.

The bow echo blew down trees and power lines across a wide swath of Central PA from Bradford and Warren into Lock Haven and Williamsport, then continued down into the Lower Susquehanna River Valley.

The rotating cell formed over Warren County, and moved to the south, into Elk County. The storm exhibited strong low-level rotation as it moved toward Saint Marys and Ridgway. The storm then continued into northern Clearfield County and strengthened. Low level reflectivity showed a classic hook echo and storm-relative velocity showed strong rotation just east of Penfield at 21:06 UTC (5:06 pm). The WSR-88D algorithms also identified a Tornado Vortex Signature from 21:01 to 21:11 UTC (5:01 to 5:11 pm) around Penfield and Parker Dam State Park. There were many reports of trees down along the path of this storm as well. An NWS Survey team did find evidence of a tornado that occurred near Tyler and Scattertown in Northern Clearfield and Southern Elk Counties. See the statement below for more information:

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
616 PM EDT MON AUG 10 2009

...EF1 TORNADO CONFIRMED NEAR TYLER IN CLEARFIELD COUNTY
PENNSYLVANIA...

LOCATION...TYLER IN CLEARFIELD COUNTY PENNSYLVANIA
DATE...AUG 09 2009
ESTIMATED TIME...458 TO 502 PM EDT
* MAXIMUM EF SCALE RATING...EF1 ESTIMATED MAXIMUM WIND SPEED...95
  TO 100 MPH MAXIMUM PATH WIDTH...150 YARDS PATH LENGTH...1.5
  MILES...
* FATALITIES...NONE
* INJURIES...NONE

* THE INFORMATION IN THIS STATEMENT IS PRELIMINARY AND SUBJECT TO
CHANGE PENDING FINAL REVIEW OF THE EVENT(S) AND PUBLICATION IN NWS
STORM DATA.

...SUMMARY...
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS CONFIRMED A
TORNADO NEAR TYLER IN CLEARFIELD COUNTY PENNSYLVANIA ON AUG 09
2009. THE TORNADO TOUCHED DOWN JUST NORTH OF SCATTERTOWN IN ELK
COUNTY AND MOVED SOUTH OVER THE CLEARFIELD COUNTY BORDER THROUGH
TYLER TO ABOUT A HALF MILE SOUTH OF TYLER. ONE HOME IN TYLER HAD
MINOR DAMAGE AND ABOUT TWO DOZEN TREES WERE KNOCKED DOWN IN THE
TORNADO PATH.

ABOUT 75 TREES AND LARGE LIMBS WERE FELLED OVER A WIDER AREA OF
HUSTON TOWNSHIP IN CLEARFIELD COUNTY AND JAY TOWNSHIP IN ELK
COUNTY INCLUDING PENFIELD...PARKER DAM STATE
PARK...HOLLYWOOD...SCATTERTOWN...AND GARDNER HILL.

THIS INFORMATION CAN ALSO BE FOUND ON OUR WEBSITE AT
WEATHER.GOV/CTP.

FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES INTO
THE FOLLOWING CATEGORIES:

EF0...WIND SPEEDS 65 TO 85 MPH.
EF1...WIND SPEEDS 86 TO 110 MPH.
EF2...WIND SPEEDS 111 TO 135 MPH.
EF3...WIND SPEEDS 136 TO 165 MPH.
EF4...WIND SPEEDS 166 TO 200 MPH.
EF5...WIND SPEEDS GREATER THAN 200 MPH.

$$

ONDREJIK/DICKEY/BUDD



The following are the preliminary storm damage reports received by 9 PM 09Aug2009:

LSRCTP

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
840 PM EDT SUN AUG 09 2009

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

0245 PM TSTM WND DMG RUSSELL 41.92N 79.14W
08/09/2009 WARREN PA EMERGENCY MNGR

NUMEROUS TREES AND WIRES DOWN IN AND AROUND RUSSELL

0300 PM TSTM WND DMG KNOXVILLE 41.96N 77.44W
08/09/2009 TIOGA PA TRAINED SPOTTER

WIDESPREAD LARGE TREES DOWN. POWERLINES DOWN.

0300 PM TSTM WND DMG WESTFIELD 41.92N 77.54W
08/09/2009 TIOGA PA TRAINED SPOTTER

LARGE TREES AND WIRES DOWN AROUND WESTFIELD AND OSCEOLA

0320 PM TSTM WND DMG 7 ENE WELLSBORO 41.78N 77.18W
08/09/2009 TIOGA PA TRAINED SPOTTER

LARGE TREES DOWN IN HILLS CREEK STATE PARK. ROADS BLOCKED
AND VEHICLES DAMAGED. SWIMMING AREA EVACUATED.

0320 PM TSTM WND DMG BRADFORD 41.96N 78.64W
08/09/2009 MCKEAN PA EMERGENCY MNGR

WIDESPREAD TREES AND POWERLINES DOWN COUNTYWIDE.

0330 PM TSTM WND DMG 3 S WELLSBORO 41.70N 77.30W
08/09/2009 TIOGA PA TRAINED SPOTTER

ROUTE 287 SOUTH OF WELLSBORO CLOSED DUE TO NUMEROUS LARGE
TREES ACROSS THE ROAD.

0337 PM TSTM WND DMG 5 E GALETON 41.73N 77.55W
08/09/2009 TIOGA PA PUBLIC

ROOFS OFF 2 BUILDINGS IN WESTERN GAINES TOWNSHIP. LARGE
TREES DOWN.

0337 PM TSTM WND DMG GALETON 41.73N 77.64W
08/09/2009 POTTER PA PUBLIC

ROOFS BLOWN OFF OF 2 BUILDINGS IN GALETON. LARGE TREES
DOWN.

0345 PM TSTM WND DMG JERSEY SHORE 41.20N 77.27W
08/09/2009 LYCOMING PA EMERGENCY MNGR

WIDESPEAD DAMAGE IN LYCOMING COUNTY. LARGE TREES DOWN
COUNTYWIDE. NUMEROUS HOMES AND CARS DESTROYED BY FALLING
TREES. ROUTE 44 CLOSED DUE TO TREES ACROSS ROAD.
WIDESPREAD DAMAGE IN LOYALSOCK...WILLIAMSPORT...MIFFLIN
TOWNSHIP AND WATERVILLE.

0355 PM TSTM WND DMG LOCK HAVEN 41.14N 77.45W
08/09/2009 CLINTON PA TRAINED SPOTTER

NUMEROUS LARGE TREES/WIRES DOWN.

0415 PM HAIL ST. MARYS 41.43N 78.56W
08/09/2009 E1.00 INCH ELK PA PUBLIC

0415 PM TSTM WND DMG MILTON 41.01N 76.85W
08/09/2009 NORTHUMBERLAND PA PUBLIC

TREES DOWN.

0420 PM TSTM WND DMG LOCK HAVEN 41.14N 77.45W
08/09/2009 CLINTON PA TRAINED SPOTTER

LARGE HEALTHY TREES DOWN.

0425 PM TSTM WND DMG 8 S ST. MARYS 41.31N 78.56W
08/09/2009 ELK PA LAW ENFORCEMENT

NUMEROUS LARGE TREES AND WIRES DOWN IN WEEDVILLE.

0446 PM TSTM WND DMG 5 N WILLIAMSTOWN 40.65N 76.62W
08/09/2009 SCHUYLKILL PA LAW ENFORCEMENT

LARGE TREES DOWN ACROSS HUBLEY TOWNSHIP.

0450 PM FLASH FLOOD PORT ALLEGANY 41.81N 78.28W
08/09/2009 MCKEAN PA EMERGENCY MNGR

WATER ACROSS ROADS IN PORT ALLEGHENY...ALSO ELDRED
BOROUGH.

0452 PM TSTM WND DMG 1 N TOWER CITY 40.60N 76.55W
08/09/2009 SCHUYLKILL PA LAW ENFORCEMENT

LARGE TREES DOWN IN PORTER TOWNSHIP.

0455 PM FLASH FLOOD 4 E BRADFORD 41.96N 78.56W
08/09/2009 MCKEAN PA EMERGENCY MNGR

FOSTER BROOK CREEK OVERFLOWING AND COVERING DERRICK ROAD.
ROAD CLOSED.

0500 PM FLASH FLOOD 3 E PORT ALLEGANY 41.81N 78.22W
08/09/2009 MCKEAN PA FIRE DEPT/RESCUE

NUMEROUS ROADS CLOSED DUE TO FLASH FLOODING AROUND PORT
ALLEGHENY.

0501 PM TSTM WND DMG PINE GROVE 40.55N 76.39W
08/09/2009 SCHUYLKILL PA LAW ENFORCEMENT

NUMEROUS TREES DOWN ACROSS PINE GROVE TOWNSHIP.

0515 PM TSTM WND DMG 1 E HARRISBURG 40.28N 76.87W
08/09/2009 DAUPHIN PA TRAINED SPOTTER

TREE FELL ON POWER LINE AND CAUGHT FIRE IN PAXTONIA.

0520 PM TSTM WND DMG MARYSVILLE 40.34N 76.93W
08/09/2009 PERRY PA EMERGENCY MNGR

NUMEROUS LARGE TREES DOWN IN MARYSVILLE.

0525 PM TORNADO 5 ESE PENFIELD 41.18N 78.51W
08/09/2009 CLEARFIELD PA EMERGENCY MNGR

TORNADO REPORTED ON THE GROUND IN PARKER STATE PARK ALONG
TYLER ROAD.

0540 PM TSTM WND DMG ELIZABETHTOWN 40.15N 76.60W
08/09/2009 LANCASTER PA TRAINED SPOTTER

TREES AND WIRES DOWN

0555 PM TSTM WND DMG 1 WNW FELTON 39.86N 76.58W
08/09/2009 YORK PA FIRE DEPT/RESCUE

TREES AND WIRES DOWN

0605 PM TSTM WND DMG 4 E DALLASTOWN 39.90N 76.57W
08/09/2009 YORK PA TRAINED SPOTTER

LARGE TREES DOWN IN WINDSOR.


&&

$$

BEACHLER

storm reports

Storm Images:
Storm Reports and Warnings for August 9, 2009.
(click image for more reports)

Line of Severe Storms across Northern PA at 1944Z (344 PM EDT).

Line of Severe Storms across Northern PA at 1944Z (344 PM EDT).

Reflectivity of a Rotating Storm over the Elk/Clearfield Co border at 2106Z (506 PM EDT).
Reflectivity of a Rotating Storm over the Elk/Clearfield Co border at 2106Z (506 PM EDT).

radar loop

KCCX Reflectivity Loop 19:03 to 21:55 UTC (3:03 to 5:55 pm)
(click for larger image)

radar loop

KCCX Reflectivity Loop 20:52 to 21:38 UTC (4:52 to 5:38 pm) over Elk and Clearfield counties.(click for larger image)

radar loop

KCCX Storm Relative Velocity Loop 20:52 to 21:38 UTC (4:52 to 5:38 pm) over Elk and Clearfield counties. (click for larger image)


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Storm Damage in Clearfield County

 

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Storm Damage in Tioga County


 
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