Alert archive / Pennsylvania / Flash Flood Warnings in 1989

Flash Flood Warning 8, NWS State College, PA

June 20, 1989Perry County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jun 20, 1989, 9:00 PM EDT for Perry County, Pennsylvania. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 20, 1989, 9:00 PM EDT (01:00 UTC)
Expired
Jun 21, 1989, 1:00 AM EDT
In force
4 hr
Issued by
NWS State College, PA
Area
Whole counties

County Perry County, PA

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.0 hours before the alert went out and 161 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 1989-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1989-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
NaN m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
35 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KHAR 210103
FFWHAR
PAC099-210500-
 
BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM AND URBAN FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
900 PM EDT TUE JUN 20 1989
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
SMALL STREAM AND URBAN FLOOD WARNING EFFECTIVE UNTIL  100 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL PENNSYLVANIA
          ...PERRY
 
PERRY COUNTY CONTROL REPORTED SOME SMALL STREAMS OUT OF THEIR BANKS IN
THE ICKESBURG AND BLAIN AREAS. AT 855 PM RADAR CONTINUED TO SHOWED
THUNDERSTORMS PRODUCING VERY HEAVY RAIN AND SOME HIGH WINDS MOVING
NORTHEAST THROUGH PERRY COUNTY.
 
 
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 8:09 PM EDTSevere Thunderstorm WarningCTPFranklin66 min
Jun 20, 9:27 PM EDTFlash Flood WarningCTPFulton4 hr
Jun 21, 7:20 AM EDTFlash Flood WarningCTPLycoming5 hr
Jun 21, 2:09 PM EDTFlash Flood WarningCTPHuntingdon4 hr
Jun 21, 3:42 PM EDTFlash Flood WarningCTPSnyder3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1989Every flash flood warning in 1989

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.