Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 21, NWS State College, PA

April 16, 1993Huntingdon County, Pennsylvania

NWS State College, PA issued this flash flood warning at Apr 16, 1993, 6:54 AM EDT for Huntingdon County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 16, 1993, 6:54 AM EDT (10:54 UTC)
Expired
Apr 16, 1993, 10:00 AM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Huntingdon County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 10.9 hours before the alert went out and 171 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 1993-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 146 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 1993-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 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
146 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
1664 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
227 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHAR 161056
FFWHAR
PAC061-161400-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
654 AM EDT FRI APR 16 1993
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1000 AM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTH CENTRAL PENNSYLVANIA
 
   ...HUNTINGDON COUNTY
 
HUNTINGDON COUNTY EMA REPORTS 1.00 TO 2.00 INCHES OF RAIN ACROSS MUCH OF
THE COUNTY OVER THE PAST COUPLE OF HOURS...AND A REPORT OF OVER 2.00
INCHES ALONG THE LAUREL RUN NEAR PETERSBURG. SOME ROADS ARE FLOODED AT
THIS TIME.
 
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES.  DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 16, 6:33 AM EDTFlash Flood WarningCTPCentre3 hr
Apr 16, 9:19 AM EDTSevere Thunderstorm WarningCTPCumberland56 min
Apr 16, 9:24 AM EDTFlash Flood WarningCTPFranklin7 hr
Apr 16, 9:30 AM EDTSevere Thunderstorm WarningCTPLycoming60 min
Apr 16, 9:45 AM EDTSevere Thunderstorm WarningCTPUnion60 min
Apr 16, 9:59 AM EDTSevere Thunderstorm WarningCTPBradford31 min
Apr 16, 10:15 AM EDTFlash Flood WarningCTPClinton4 hr
Apr 16, 10:15 AM EDTFlash Flood WarningCTPBradford4 hr
Apr 16, 11:25 AM EDTFlash Flood WarningCTPCumberland, Dauphin, York6 hr
Apr 16, 12:25 PM EDTFlash Flood WarningCTPTioga110 min
Apr 16, 1:56 PM EDTFlash Flood WarningCTPBradford, Clinton, Lycoming, Sullivan, Tioga4 hr
Apr 16, 3:55 PM EDTFlash Flood WarningCTPLancaster5 hr
Apr 16, 4:14 PM EDTFlash Flood WarningCTPFranklin, Huntingdon5 hr
Apr 16, 5:15 PM EDTFlash Flood WarningCTPBradford, Clinton, Lycoming5 hr
Apr 16, 7:48 PM EDTSevere Thunderstorm WarningCTPFulton57 min

Nearby

Flash Flood Warnings in Pennsylvania, 1993Every flash flood warning in 1993

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.