Alert archive / Pennsylvania / Flash Flood Warnings in 1994

Flash Flood Warning 21, NWS Pittsburgh, PA

March 21, 1994Indiana County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Mar 21, 1994, 7:39 PM EST for Indiana County, Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Mar 21, 1994, 7:39 PM EST (00:39 UTC)
Expired
Mar 21, 1994, 11:45 PM EST
In force
4 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Indiana County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 0.7 hours before the alert went out and 90 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, Pittsburgh, PA at 00:00Z on 1994-03-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 137 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, Pittsburgh, PA at 00:00Z on 1994-03-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -105 square meters per square second.1939587897Sfc1 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
137 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
535 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
-105 m²/s²
0-3 km storm-relative helicity
-66 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPIT 220043
FFWPIT
PAC063-220445-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
739 PM EST MON MAR 21 1994
 
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 1145 PM EST
FOR THE FOLLOWING LOCATION...
 
IN WEST PENNSYLVANIA
 
   ...INDIANA COUNTY
 
MARSH RUN IN THE CITY OF INDIANA IS OUT OF ITS BANKS AND FLOODING A
ROADWAY. PENN RUN IS ALSO OUT OF ITS BANKS AND FLOODING STATE ROUTE 533.
 
 
 
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 WATER0 BEGINS RISING.

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.