Alert archive / Pennsylvania / Flash Flood Warnings in 1994

Flash Flood Warning 33, NWS State College, PA

August 25, 1994Clinton County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 25, 1994, 8:50 PM EDT for Clinton County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Aug 25, 1994, 8:50 PM EDT (00:50 UTC)
Expired
Aug 26, 1994, 12:00 AM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Clinton County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.8 hours before the alert went out and 208 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, Buffalo Intl Airport, NY at 00:00Z on 1994-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1979 joules per kilogram.LCLEL10008507005003002001001 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, Buffalo Intl Airport, NY at 00:00Z on 1994-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 87 square meters per square second.1939Sfc1 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
1979 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
767 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
87 m²/s²
0-3 km storm-relative helicity
81 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCTP 260052
FFWCTP
PAC035-260400-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
850 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
 
   ...SOUTHERN CLINTON COUNTY
 
AT 0845PM STATE COLLEGE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY
HEAVY RAINFALL OVER SOUTHERN CLINTON COUNTY. THIS HEAVY RAINFALL IS
OCCURRING OVER AREA WHICH RECEIVED HEAVY RAINFALL EARLIER THIS EVENING.
RADAR RAINFALL ESTIMATES IN THIS AREA ARE BETWEEN 3 AND 4 INCHES OF
RAINFALL.
 
THE HEAVY RAINFALL SHOULD MOVE OUT OF THIS AREA BEFORE MIDNIGHT.
 
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.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

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, 5 hours 4 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, 8:30 PM EDTFlash Flood WarningCTPCentre, Union4 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.