Alert archive / Pennsylvania / Flash Flood Warnings in 1988

Flash Flood Warning 2, NWS State College, PA

May 17, 1988Adams County, Pennsylvania

NWS State College, PA issued this flash flood warning at May 17, 1988, 2:04 PM EDT for Adams County, Pennsylvania. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
May 17, 1988, 2:04 PM EDT (18:04 UTC)
Expired
May 17, 1988, 8:00 PM EDT
In force
6 hr
Issued by
NWS State College, PA
Area
Whole counties

County Adams 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 12:00Z, 6.1 hours before the alert went out and 104 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 12:00Z on 1988-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 98 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 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 12:00Z on 1988-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 km3 km6 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
98 J/kg
Mixed-layer CIN
-94 J/kg
Mixed-layer LCL
782 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
-47 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 KHAR 171806
FFWHAR
PAC001-172100-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
204 PM EDT TUE MAY 17 1988
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  500 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
 
IN SOUTH CENTRAL PENNSYLVANIA
          ...ADAMS
 
4 AND A HALF INCHES OF RAIN FELL DURING THE LAST HOUR IN THE VICINITY
OF CASHTOWN IN NORTHWEST ADAMS COUNTY. EOC REPORTED THE CONEWAGO CREEK
OUT OF ITS BANK AT ITS HEADWATERS.
 
 
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
May 17, 3:48 PM EDTSevere Thunderstorm WarningCTPYork57 min

Nearby

Flash Flood Warnings in Pennsylvania, 1988Every flash flood warning in 1988

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.