Alert archive / Pennsylvania / Flash Flood Warnings in 2000

Flash Flood Warning 38, NWS State College, PA

August 27, 2000Cumberland County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 27, 2000, 7:48 PM EDT for Cumberland County, Pennsylvania. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 27, 2000, 7:48 PM EDT (23:48 UTC)
Expired
Aug 27, 2000, 9:45 PM EDT
In force
117 min
Issued by
NWS State College, PA
Area
Whole counties

County Cumberland County, PA

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 12:00Z, 11.8 hours before the alert went out and 135 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 2000-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 440 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 2000-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
440 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
957 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
39 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 
WGUS51 KCTP 272352
FFWCTP
PAC041-280145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
748 PM EDT SUN AUG 27 2000

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CUMBERLAND COUNTY.

* UNTIL 945 PM EDT.

* AT 745 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A THUNDERSTORM WITH VERY HEAVY RAINFALL WAS NEARLY STATIONARY OVER 
  PINEY MOUNTAIN IN SOUTHERN CUMBERLAND COUNTY.

SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH 
FLOODING...ESPECIALLY ACROSS SOUTHERN CUMBERLAND COUNTY...NEAR THE 
ADAMS COUNTY LINE.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED. MOVE TO
HIGHER GROUND.

$$

LAT...LON 4026 7706 4014 7708 4006 7740 4025 7749

MARTIN

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.

NWS State College, PA wrote its last area forecast discussion before this flash flood warning went out at Aug 27, 3:00 PM EDT, 4 hours 48 minutes earlier.

Area forecast discussion, Aug 27, 3:00 PM EDT, 4 hours 48 minutes before
CENTRAL PENNSYLVANIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
300 PM EDT SUN AUG 27 2000

POTENT SHRTWV/UPR CENTER OVER OH IS MAKING SLOW PROGRESS SEWD THIS
AFTN. NARROW BAND OF SHOWERS AND SOME EMBEDDED THUNDERSTORMS MAKING
ITS WAY ACROSS WRN PART OF OUR CWA ATTM. THE BAND IS MVNG INTO PLUME
OF HIGHER SFC DEWPOINTS OVER SCENTRAL PA...HELPING TSTMS TO CONTINUE
FOR THE TIME BEING. MOVEMENT AND COVERAGE OF THE SHWRS/TSTMS INTO
THIS EVENING WILL CONTINUE TO BE THE MAIN FCST PROBLEM. THUS WILL
DELAY ZONE ISSUANCE UNTIL JUST BEFORE 4PM.

GRADUAL CLEARING OF CLOUD COVER FROM NW TO SE EXPECTED TONIGHT WITH
WIDESPREAD FOG DEVELOPMENT ALSO EXPECTED WITH THE CLEARING LATE
TONIGHT WITH FOG HANGING AROUND THROUGH MON AM.

AS UPR LOW PROCEEDS TO VA AND LOW PRESSURE DEVELOPS ALONG THE
EASTER SEABOARD...EASTERLY FLOW WILL KEEP SOME CLOUDS OVER ERN CWA
MON MORN.

EXTENDED...
WARMING TREND SHAPIYNG UP IN THE EXTENDED AS UPR RIDGE BUILDS EAST
INTO THE MIDATLC. CHNC OF SHWR/TSTM WED INTO EARLY THUR FOR THE WEST
AS NEXT SYSTEM APPROACHES FROM THE NW.

.CTP...NONE.

GARTNER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 1:43 PM EDTSevere Thunderstorm WarningCTPSomerset62 min
Aug 27, 2:18 PM EDTSevere Thunderstorm WarningCTPCambria57 min
Aug 27, 5:28 PM EDTSevere Thunderstorm WarningCTPAdams92 min
Aug 27, 6:27 PM EDTFlash Flood WarningCTPAdams3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2000Every flash flood warning in 2000

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.