Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 39, NWS State College, PA

July 14, 1993Lancaster County, Pennsylvania

NWS State College, PA issued this flash flood warning at Jul 14, 1993, 2:02 PM EDT for Lancaster County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Jul 14, 1993, 2:02 PM EDT (18:02 UTC)
Expired
Jul 14, 1993, 5:00 PM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Lancaster County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 6.0 hours before the alert went out and 157 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 1993-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2105 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 12:00Z on 1993-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
2105 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
911 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
70 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 141805
FFWHAR
PAC071-142100-
 
IMMEDIATE BROADCAST REQUESTED
URBAN AND SMALL STREAM FLOOD WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
202 PM EDT WED JUL 14 1993
 
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
URBAN AND SMALL STREAM FLOOD WARNING EFFECTIVE UNTIL  500 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATION......
 
IN SOUTH CENTRAL PENNSYLVANIA
 
   ...LANCASTER COUNTY
 
SKYWARN SPOTTERS AND PUBLIC REPORTS FROM LANCASTER COUNTY REPORT
FLOODING OF ROADWAYS IN LAMPETER. SPOTTERS REPORT 2 FEET OF WATER ON
THE ROAD AT THE INTERSECTION OF ROUTE 30 AND OAKVIEW ROAD.
 
CARS WILL FLOAT IN TWO FEET OF WATER.
 
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.
 
FENNER
 
 
&

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 1:17 PM EDTSevere Thunderstorm WarningCTPLancaster58 min
Jul 14, 2:36 PM EDTSevere Thunderstorm WarningCTPBerks, Lehigh29 min
Jul 14, 3:47 PM EDTSevere Thunderstorm WarningCTPCarbon28 min
Jul 14, 4:05 PM EDTSevere Thunderstorm WarningCTPMonroe40 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.