Alert archive / Pennsylvania / Flash Flood Warnings in 1993

Flash Flood Warning 9, NWS State College, PA

April 1, 1993Lancaster County, Pennsylvania

NWS State College, PA issued this flash flood warning at Apr 1, 1993, 8:20 AM EST for Lancaster County, Pennsylvania. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Apr 1, 1993, 8:20 AM EST (13:20 UTC)
Expired
Apr 1, 1993, 11:15 AM EST
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, 1.3 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 1993-04-01Temperature 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 12:00Z on 1993-04-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
532 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
154 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 011327 COR
FFWHAR
PAC071-011615-

BULLETIN - EBS ACTIVATION REQUESTED
SMALL STREAM FLOOD WARNING...CORRECTED HEADER AND TYPO
NATIONAL WEATHER SERVICE HARRISBURG PA
820 AM EST THU APR 1 1993

THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
FLOOD WARNING EFFECTIVE UNTIL 1115 AM EST
FOR PEOPLE IN THE FOLLOWING LOCATION......

IN SOUTH CENTRAL PENNSYLVANIA

   ...NORTHERN LANCASTER COUNTY

EMERGENCY MANAGEMENT OFFICIALS REPORTED THAT THE LITTLE CHICKEES CREEK
IN NORTHERN LANCASTER COUNTY HAS EXCEEDED FLOOD STAGE. AT 8 AM MINOR
FLOODING ALONG THE CREEK HAS CAUSED MANY ROADS TO CLOSE.

AT 8 AM HARRISBURG RADAR SHOWED JUST A FEW PATCHES OF LIGHT RAIN ACROSS
LANCASTER 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.



KOWALZYK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 1, 8:55 AM ESTFlash Flood WarningCTPMifflin, Union3 hr
Apr 1, 9:55 AM ESTFlash Flood WarningCTPFranklin6 hr
Apr 1, 6:50 PM ESTFlash Flood WarningCTPCumberland, York3 hr

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.