Alert archive / Pennsylvania / Flash Flood Warnings in 1994

Flash Flood Warning 34, NWS State College, PA

August 25, 1994Cumberland County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 25, 1994, 9:34 PM EDT for Cumberland County, Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Aug 25, 1994, 9:34 PM EDT (01:34 UTC)
Expired
Aug 26, 1994, 2:00 AM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Whole counties

County Cumberland County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.6 hours before the alert went out and 135 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 260137
FFWCTP
PAC041-260600-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
934 PM EDT THU AUG 25 1994
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  200 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  PENNSYLVANIA
 
   ...CUMBERLAND COUNTY
 
AT 930 PM EDT... DOPPLER RADAR FROM STATE COLLEGE SHOWED THUNDERSTORMS
WITH VERY HEAVY RAINFALL FROM THE STATE COLLEGE AREA SOUTH ACROSS
CUMBERLAND COUNTY. THE THUNDERSTORMS WERE MOVING SOUTHEAST AND PROLONGED
HEAVY RAINFALL WILL OCCUR IN CUMBERLAND COUNTY IN THE NEXT 1 TO 3 HOURS.
 
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE
THE DANGERS OF FLOODS AND FLASH FLOODS.  IF FLASH FLOODING IS
OBSERVED...ACT QUICKLY.  MOVE UP TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
 
NICOSIA

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 48 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, 8:50 PM EDTFlash Flood WarningCTPClinton3 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.