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August 31st, 2005 - Severe Weather Associated with Katrina

Strong thunderstorms formed in the high-shear environment that was present as the remnants of once-Category-Five Hurricane Katrina (loop) passed through Pennsylvania.

A few tornadoes formed as supercell thunderstorms moved through the Great Valley and Lower Susquehanna Valley just after midnight on the 31st. Sporadic wind damage occurred in other areas as well. Read a more scientific explanation of these storms.

Text Reports of Damage
Summary of the preliminary storm damage reports (LSRCTP)
24 hour precipitation reports from observers
(compiled from reports received in real time during the event).
Public Information Statements on the surveyed tornado damage.

Storm Imagery - Adams County north to Cumberland County
Interactive Radar Imagery
All Loops 0409 UTC - 0559 UTC (12:09 - 01:59 AM)

Sterling WSR-88D Base Reflectivity loop
Sterling WSR-88D Storm Relative Motion loop
Sterling WSR-88D Reflectivity/Storm Relative Motion loop
State College WSR-88D Reflectivity/Storm Relative Motion loop
Storm Damage Survey Photos
Cumberland and York Counties
Adams County near Tyrone Township


Storm Imagery - Lycoming County Tornado
Interactive Radar Imagery
State College WSR-88D Reflectivity/Storm Relative Motion loop
0703 UTC - 0831 UTC (3:03 - 4:31 AM)
State College WSR-88D Reflectivity/Storm Relative Motion loop
0831 UTC - 0853 UTC (4:31 - 4:53 AM)
Storm Damage Survey Photos
Lycoming County

Damage Location Maps

Storm Relative Motion Image (from KLWX (Sterling, VA) radar) around the time tornado was on the ground in Adams County:
Click on a damage track to view a close-up map of that area.

KLWX SRM image and map of damage locations

Damage path of F1 tornado that occurred in Northern Lycoming County later that night:


Rainfall Total (Multi-Sensor Precip Estimate from MARFC) for 48 hours (top panel) and
2-Day Total Cooperative Observer Precipitation reports (bottom panel).
Both images show the same period 7:00 am August 30 to 7:00 am September 1.

Multi-Sensor Precipitation Estimate Map for 8-30 thru 9/1
COOP Precip Rainfall

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State College, Pennsylvania 16803
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Page Last Modified: 25 March 2006 22:50:23 UTC
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