Alert archive / Pennsylvania / Flash Flood Warnings in 1998

Flash Flood Warning 13, NWS Pittsburgh, PA

January 8, 1998Beaver County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at Jan 8, 1998, 10:55 AM EST for Beaver County, Pennsylvania. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 8, 1998, 10:55 AM EST (15:55 UTC)
Expired
Jan 8, 1998, 2:00 PM EST
In force
3 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Beaver County, PA

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 3.9 hours before the alert went out and 37 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 1998-01-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 129 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 1998-01-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 148 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
129 J/kg
Mixed-layer CIN
-15 J/kg
Mixed-layer LCL
640 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
148 m²/s²
0-3 km storm-relative helicity
146 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPIT 081557
FFWPIT
OHC059-081-119-PAC053-007-081900-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
1055 AM EST THU JAN 8 1998
 
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL  200 PM EST
FOR THE FOLLOWING LOCATIONS...
 
IN EAST CENTRAL OHIO
 
   ...GUERNSEY COUNTY...JEFFERSON COUNTY...MUSKINGUM COUNTY
 
 
IN NORTHWEST PENNSYLVANIA
 
   ...FOREST COUNTY
 
IN WEST PENNSYLVANIA
 
   ...BEAVER COUNTY
 
THE FLOOD WARNING HAS BEEN EXTENDED UNTIL 200 PM THIS AFTERNOON FOR THE
ABOVE MENTIONED COUNTIES. NUMEROUS ROADS REMAIN FLOODED AND SMALL
STREAMS AND CREEKS REMAIN OUT OF THEIR BANKS.
 
DO NOT DRIVE INTO AREAS WHERE THE dWATER COVERS THE ROAD.  THE WATER
MAY BE TOO DEEP TO ALLOW YOUR CAR TO CROSS SAFELY.  VEHICLES CAUGHT
IN RISING WATER SHOULD BE ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
 
KANE/PALKO
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 8, 8:01 AM ESTFlash Flood WarningPBZBeaver4 hr
Jan 8, 8:16 AM ESTFlash Flood WarningPBZForest4 hr
Jan 8, 10:55 AM ESTFlash Flood WarningPBZForest3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1998Every flash flood warning in 1998

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.