Alert archive / Pennsylvania / Flash Flood Warnings in 1992

Flash Flood Warning 7, NWS Pittsburgh, PA

July 20, 1992Indiana County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jul 20, 1992, 6:32 PM EDT for Indiana County, Pennsylvania. It was in force for 58 min.

The area

The counties it named.

The facts

Issued
Jul 20, 1992, 6:32 PM EDT (22:32 UTC)
Expired
Jul 20, 1992, 7:30 PM EDT
In force
58 min
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Indiana County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.5 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 12:00Z on 1992-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 136 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 12:00Z on 1992-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.193958Sfc1 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
136 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
874 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
104 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 KERI 202235
FFWPIT
PAC063-202330-
 
BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
ISSUED BY ERIE PA
632 PM EDT MON JUL 20 1992
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
EFFECTIVE UNTIL  730 PM EDT
FOR THE FOLLOWING LOCATION...
 
IN WEST PENNSYLVANIA
 
   ...INDIANA COUNTY
 
RADAR INDICATED A SEVERE THUNDERSTORM MOVING INTO NORTHWESTERN INDIANA
COUNTY. THIS STORM HAS A HISTORY OF STRONG DESTRUCTIVE WINDS.
 
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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, Jul 20, 2:07 PM EDT, 4 hours 25 minutes before
PAZ001>006-013>015-WVZ001-210000-

SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH TIL 8 PM.
NATIONAL WEATHER SERVICE PITTSBURGH PA
210 PM EDT MON JUL 20 1992

THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH UNTIL 800 PM FOR THE FOLLOWING COUNTIES IN
WESTERN PENNSYLVANIA

ALLEGHENY...ARMSTRONG...BEAVER...BUTLER...CAMERON...CLARION...
CLEARFIELD...CLINTON...CRAWFORD...ELK...ERIE...FOREST...INDIANA...
JEFFERSON...LAWRENCE...MCKEAN...MERCER...POTTER...VENANGO...WARREN...
WASHINGTON AND WESTMORELAND.

LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING THUNDERSTORM WINDS
ARE POSSIBLE IN THESE AREAS.  HEAVY DOWNPOURS MAY ALSO CAUSE POOR
DRAINAGE AND LOW LAND FLOODING.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

STAIRS/HIGGINS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 4:39 PM EDTSevere Thunderstorm WarningPBZClarion, Jefferson66 min
Jul 20, 5:00 PM EDTFlash Flood WarningPBZButler3 hr
Jul 20, 5:13 PM EDTSevere Thunderstorm WarningPBZButler62 min
Jul 20, 5:56 PM EDTFlash Flood WarningPBZArmstrong, Beaver, Butler, Clarion2 hr
Jul 20, 5:56 PM EDTFlash Flood WarningPBZJefferson2 hr
Jul 20, 5:56 PM EDTSevere Thunderstorm WarningPBZArmstrong, Butler, Clarion, Jefferson2 hr
Jul 20, 5:56 PM EDTSevere Thunderstorm WarningPBZBeaver2 hr
Jul 20, 6:32 PM EDTSevere Thunderstorm WarningPBZIndiana58 min

Nearby

Flash Flood Warnings in Pennsylvania, 1992Every flash flood warning in 1992

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.