Severe Storms of 26 Sept 2007
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Severe Storms of 26 Sept 2007
Strong wind shear, abnormally warm temperatures, and high humidity for late September combined to produce severe thunderstorms - and one confirmed tornado near Tidioute, PA - over Northwest PA during the evening of Wednesday, 26 September 2007.

Numerous reports of funnel clouds were received that evening in real time as the event was on-going.

See the maps/pictures below for a quick summary of the storms Wed Evening.
A storm damage suurvey team investigated damage in Warren County on Friday. See their findings below:
NOUS41 KCTP 282009
PNSCTP
PAZ004-290015-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
409 PM EDT FRI SEP 28 2007

...FINAL DAMAGE SURVEY RESULTS FOR WARREN COUNTY...

...AN EF1 TORNADO OCCURRED NEAR TIDIOUTE WEDNESDAY EVENING IN
SOUTHERN WARREN COUNTY...

THE FOLLOWING IS A FINAL ASSESSMENT FOR THE DAMAGE THAT OCCURRED
IN WARREN COUNTY ON SEPTEMBER 26, 2007.

* EVENT DATE: SEPTEMBER 26, 2007

* ESTIMATED START TIME: 600 PM

* ESTIMATED END TIME: 610 PM

* EVENT TYPE: EF1 TORNADO

* EVENT LOCATION: FROM 2 MILES NORTHEAST OF TIDIOUTE TO 5 MILES
  NORTHEAST OF TIDIOUTE.

* PEAK WIND: ESTIMATED AT 90-100 MPH.

* AVERAGE PATH WIDTH: 25 YARDS.

* PATH LENGTH: 3 MILES.

* INJURIES: NONE REPORTED.

* FATALITIES: NONE REPORTED.

* DISCUSSION/DAMAGE: THE TORNADO TOUCHED DOWN TWO MILES NORTHEAST
  OF TIDIOUTE IN SOUTHERN WARREN COUNTY, THEN TRACKED NORTHEAST
  ALONG THE ALLEGHENY RIVER FOR AN ADDITIONAL THREE MILES. SEVERAL
  HUNTING CABINS AND UNINHABITED DWELLINGS WERE DAMAGED FROM THE
  STORM. IN ADDITION, SEVERAL HUNDRED TREES WERE TOPPLED OR
  DAMAGED ALONG THE TORNADO PATH. SEVERAL EYEWITNESSES SAW THE
  DESCENDING FUNNEL CLOUD IN THE VICINITY OF TIDIOUTE AND ONE
  REPORTED SEEING THE TORNADO ON THE GROUND NORTHEAST OF TIDIOUTE.

&&

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.

$$

Damage Pictures from the Survey


(Healthy) Trees snapped off
(Healthy) Trees snapped off
 
In the middle of the tornado path
In the middle of the tornado path
 
More healthy trees snapped off, and laying in multiple directions
More healthy trees snapped off, and laying in multiple directions
 
Trees snapped and damage to structure/camp
Trees snapped and damage to structure/camp
 
Criss-crossing trees, uprooted
Criss-crossing trees, uprooted
 
Tree damage in riparian zone of Allegheny River
Tree damage in riparian zone of Allegheny River
 
NWUS51 KCTP 262320
LSRCTP

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
720 PM EDT WED SEP 26 2007

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

0548 PM     TSTM WND DMG     TIDIOUTE                41.68N 79.40W
09/26/2007                   WARREN             PA   EMERGENCY MNGR

            PHONE LINES DOWN. HAIL ALSO REPORTED.

0550 PM     HAIL             TIDIOUTE                41.68N 79.40W
09/26/2007  E1.75 INCH       WARREN             PA   EMERGENCY MNGR

            HAIL AND FUNNEL CLOUD SPOTTED.

0608 PM     FUNNEL CLOUD     3 WSW CLARENDON         41.76N 79.15W
09/26/2007                   WARREN             PA   EMERGENCY MNGR

            FUNNEL CLOUD SPOTTED AT CHAPMAN STATE PARK.

0610 PM     HAIL             CLARENDON               41.78N 79.10W
09/26/2007  E0.75 INCH       WARREN             PA   PUBLIC

            PENNY-SIZE HAIL REPORTED IN CLARENDON.

0620 PM     FUNNEL CLOUD     WARREN                  41.84N 79.14W
09/26/2007                   WARREN             PA   FIRE DEPT/RESCUE

            THREE FUNNEL CLOUDS SPOTTED OVER WARREN.


&&

$$

CJE
Map of Warnings and preliminary reports - Summary for 26 Sept 2007.
Map of Warnings and preliminary reports - Summary for 26 Sept 2007.

Storm complex moving into western Warren County, note the bookend vortex already forming.
Storm complex moving into western Warren County, note the bookend vortex already forming.

Storm as it produced golf-ball size hail in Tidioute.
Storm as it produced golf-ball size hail in Tidioute.

Storm as it entered Western McKean County.
Storm as it is entering Western McKean County.


 
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Page Last Modified: 02 October 2007 04:07:32 UTC
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