Alert archive / Pennsylvania / Flash Flood Warnings in 1994

Flash Flood Warning 32, NWS State College, PA

August 25, 1994Centre County, Union County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 25, 1994, 8:30 PM EDT for Centre County, Union County, Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Aug 25, 1994, 8:30 PM EDT (00:30 UTC)
Expired
Aug 26, 1994, 12:00 AM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Whole counties

Counties Centre County, PA, Union County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.5 hours before the alert went out and 221 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 1994-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 842 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 1994-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
842 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
981 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KCTP 260034
FFWCTP
PAC027-119-260400-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
830 PM EDT THU AUG 25 1994
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1200 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS.....
 
IN  PENNSYLVANIA
 
   ...EASTERN CENTRE COUNTY...WESTERN UNION COUNTY
 
AT 0825 PM STATE COLLEGE DOPPLER RADAR SHOW SCATTERED THUNDERSTORMS FROM
NORTH OF LOCK HAVEN TO THE HARRISBURG AREA. THESE THUNDERSTORMS ARE
PRODUCING LOCALLY HEAVY RAINFALL IN EASTERN CENTRE AND WESTERN UNION
COUNTY. RAINFALL TOTALS OF UP TO 3.00 INCHES HAVE BEEN REPORTED IN
EASTERN CENTRE COUNTY...WITH 0.50 INCH IN THE LAST HALF HOUR. THESE
THUNDERSTORMS WILL CONTINUE TO AFFECT THE AREA FOR THE NEXT HOUR OR SO.
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLdES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
RISHEL

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 25, 3:46 PM EDT, 4 hours 44 minutes before
PAZ004>006-010>012-017>019-024>028-033>037-041-042-
045-046-049>053-056>059-063>066-252100-

SPECIAL WEATHER STATEMENT AND NOWCAST
NATIONAL WEATHER SERVICE STATE COLLEGE PA
340 PM EDT THU AUG 25 1994

...ISOLATED THUNDERSTORMS WILL BE OVER CENTRAL PENNSYLVANIA THIS
AFTERNOON...

STORMS WITH TORRENTIAL RAIN...AND POSSIBLE BRIEF GUSTY WINDS AND
SMALL HAIL...WERE OVER WESTERN PENNSYLVANIA...JUST WEST OF DUBOIS
...AND 20 MILES NORTH OF WILLIAMSPORT AT 330 PM.

THESE STORMS ARE MOVING SOUTHEAST AT 20 MILES AN HOUR...AND WILL
BE JUST EAST OF WILLIAMSPORT AND PHILIPSBURG BY 5 PM.

OTHER STORMS WERE JUST SOUTHEAST OF ERIE...AND WILL BE MOVING
ACROSS SOUTHWEST WARREN COUNTY BY 430 PM.  THESE STOHRMS MAY HAVE
BRIEF GUSTY WINDS AND SMALL HAIL.

IF THREATENING WEATHER OCCURS...SEEK SHELTER QUICKLY.

MARTIN

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 25, 8:01 PM EDTTornado WarningCTPPerry59 min
Aug 25, 8:13 PM EDTTornado WarningCTPCumberland, Dauphin62 min
Aug 25, 8:50 PM EDTFlash Flood WarningCTPClinton3 hr
Aug 25, 9:34 PM EDTFlash Flood WarningCTPCumberland4 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1994Every flash flood warning in 1994

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.