National Weather Service United States Department of Commerce

Powerful Storm in the Western U.S.; Heavy Rain and Flooding Threat Across the Central Gulf Coast

A powerful storm system will continue to bring heavy mountain snow, rain, and high winds to the Pacific Northwest and northern California through midweek. Heavy rain and flash flooding potential exists across the central Gulf Coast over the next few days, including the Florida Panhandle. A Slight Risk (level 2 of 4) of excessive rainfall is in effect Tuesday. Read More >

State College, PA

Weather Forecast Office

Hail Storms of May 10th, 2007

Weather.gov > State College, PA > Hail Storms of May 10th, 2007

Overview

Showers and thunderstorms formed in a moist airmass over Central PA during the late morning and early afternoon on May 10th. These storms had little wind shear to make them move or to create wind damage through mixing, but the temperatures aloft were conducive to make hail.

Image Image
Graphic of issued severe weather alerts. 00z sounding from Sterling, VA

Radar

Note in the Reflectivity Cross section below the amount of high returns in the mid level of the storm. The freezing level was around 12kft this day.

Radar Image Radar Image Radar Image
Reflectivity plan view from 2101z Storm Relative Motion from 2101z Reflectivity Cross Section through hail storm Northwest of Shippensburg, PA

Storm Reports

NWUS51 KCTP 110031
LSRCTP

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE STATE COLLEGE PA
831 PM EDT THU MAY 10 2007

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

0200 PM     HAIL             MILL HALL               41.10N 77.49W
05/10/2007  E0.75 INCH       CLINTON            PA   TRAINED SPOTTER

            PENNY SIZE HAIL

0214 PM     HAIL             LOCK HAVEN              41.14N 77.45W
05/10/2007  E0.75 INCH       CLINTON            PA   TRAINED SPOTTER

            REPORTED AT LOCK HAVEN AIRPORT

0215 PM     HAIL             COGAN STATION           41.31N 77.03W
05/10/2007  E1.00 INCH       LYCOMING           PA   TRAINED SPOTTER

0535 PM     HAIL             2 N WILLOW HILL         40.14N 77.77W
05/10/2007  E1.00 INCH       FRANKLIN           PA   PUBLIC

0610 PM     HAIL             N CARLISLE              40.20N 77.20W
05/10/2007  M0.88 INCH       CUMBERLAND         PA   TRAINED SPOTTER

0715 PM     FLASH FLOOD      N CARLISLE              40.20N 77.20W
05/10/2007                   CUMBERLAND         PA   TRAINED SPOTTER

            INTERSECTIONS FLOODED AND CREEKS RISING.

0806 PM     FLASH FLOOD      CARLISLE                40.20N 77.20W
05/10/2007                   CUMBERLAND         PA   EMERGENCY MNGR

            WATER RESCUE REPORTED IN SILVER SPRING TOWNSHIP. 3.5
            INCHES OF RAINFALL BETWEEN 5 AND 8PM IN CARLISLE.


&&

$$

nws logo Media use of NWS Web News Stories is encouraged!
Please acknowledge the NWS as the source of any news information accessed from this site.		 nws logo

Follow us on Twitter  Follow us on Twitter
Follow us on Facebook  Follow us on Facebook
CTP RSS Feed  CTP RSS Feed

NWS State College

PAST WEATHER
Additional Links