Alert archive / Pennsylvania / Flash Flood Warnings in 1994

Flash Flood Warning 24, NWS State College, PA

August 18, 1994Lycoming County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 18, 1994, 1:00 PM EDT for Lycoming County, Pennsylvania. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued
Aug 18, 1994, 1:00 PM EDT (17:00 UTC)
Expired
Aug 18, 1994, 5:45 PM EDT
In force
5 hr
Issued by
NWS State College, PA
Area
Whole counties

County Lycoming County, PA

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.0 hours before the alert went out and 222 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, Buffalo Intl Airport, NY at 12:00Z on 1994-08-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 12 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, Buffalo Intl Airport, NY at 12:00Z on 1994-08-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -53 square meters per square second.1939Sfc1 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
12 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
786 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-53 m²/s²
0-3 km storm-relative helicity
-55 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 KCTP 181735
FFWCTP
PAC081-182145-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
100 PM EDT THU AUG 18 1994
 
THE NATIONAL WEATHER SERVICE IN STATE COLLEGE HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  545 PM EDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS......
 
IN  PENNSYLVANIA
 
   ...NORTHERN LYCOMING COUNTY
 
...FLOOD WARNING CONTINUES IN EFFECT UNTIL 5 PM FOR NORTHERN LYCOMING
COUNTY...
 
LYCOMING COUNTY EMERGENCY MANGAGEMENT OFFICIALS REPORT THAT SIGNIFICANT
FLOODING CONTINUES ALONG THE LYCOMING AND PINE CREEKS. 400 PEOPLE REMAIN
EVACUATED FROM THEIR HOMES ALONG LYCOMING CREEK. WATERS ARE BEGINNING TO
RECEDE IN THE COUNTY BUT AREAS THAT WERE HARD HIT BY HEAVY RAIN WILL
REMAIN UNDER WATER FOR SEVERAL MORE HOURS. THE REMAINDER OF THE
AFTERNOON SHOULD MAINLY CLOUDY WITH A FEW SHOWERS OR SPRINKLES...BUT NO
HEAVY RAIN.
 
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.
 
LA CORTE
 
&

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Aug 18, 10:45 AM EDT, 2 hours 15 minutes before
PAZ012-037-038-041-042-045-046-049>052-181800-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
1045 AM EDT THU AUG 18 1994

RADIO STATION WX-55 WILLIAMSPORT PENNSYLVANIA IS OFF THE AIR.
PERSONNEL ARE WORKING ON THE PROBLEM AND WILL RESTORE SERVICE AS SOON
AS POSSIBLE.

FJG
Special weather statement, Aug 18, 12:50 PM EDT, 10 minutes before
PAZ012-037-038-041-042-045-046-049>052-181750-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
1250 AM EDT THU AUG 18 1994

RADIO STATION WX-55 WILLIAMSPORT PENNSYLVANIA IS BACK ON THnE AIR.

FJG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 17, 11:25 PM EDTFlash Flood WarningCTPCameron2 hr
Aug 18, 1:08 AM EDTFlash Flood WarningCTPLycoming2 hr
Aug 18, 1:23 AM EDTFlash Flood WarningCTPTioga2 hr
Aug 18, 1:31 AM EDTFlash Flood WarningCTPPotter119 min
Aug 18, 2:39 AM EDTFlash Flood WarningCTPUnion2 hr
Aug 18, 3:05 AM EDTFlash Flood WarningCTPTioga3 hr
Aug 18, 3:10 AM EDTFlash Flood WarningCTPLycoming3 hr
Aug 18, 3:40 AM EDTFlash Flood WarningCTPClearfield, Clinton4 hr
Aug 18, 3:52 AM EDTFlash Flood WarningCTPCentre4 hr
Aug 18, 4:25 AM EDTFlash Flood WarningCTPTioga6 hr
Aug 18, 4:34 AM EDTFlash Flood WarningCTPLycoming, Union5 hr
Aug 18, 9:00 AM EDTFlash Flood WarningCTPCameron3 hr
Aug 18, 9:57 AM EDTFlash Flood WarningCTPLycoming, Tioga3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 1994Every flash flood warning in 1994

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.