Alert archive / Pennsylvania / Flash Flood Warnings in 2003

Flash Flood Warning 22, NWS State College, PA

August 9, 2003Centre County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 9, 2003, 7:46 PM EDT for Centre County, Pennsylvania. It was in force for 3 hr. 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 9, 2003, 7:46 PM EDT (23:46 UTC)
Expired
Aug 9, 2003, 10:45 PM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Centre County, PA

The radar

The State College radar (KCCX), 15 km from the middle of the area, began a volume at 23:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 11.8 hours before the alert went out and 200 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, Pittsburgh, PA at 12:00Z on 2003-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 366 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, Pittsburgh, PA at 12:00Z on 2003-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.19395878Sfc1 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
366 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
671 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
34 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 092347
FFWCTP
PAC027-100245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE STATE COLLEGE PA
746 PM EDT SAT AUG 9 2003

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRE COUNTY IN CENTRAL PENNSYLVANIA

* UNTIL 1045 PM EDT.

* AT 745 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY 
SHOWERS AND THUNDERSTORMS CONTINUING TO FEED NORTHWARD ACROSS THE 
WARNING AREA.

SHOWERS AND THUNDERTSORMS ARE EXPECTED TO CONTINUE CAUSING 
TORRENTIAL RAINS OVER MUCH OF WESTERN CENTRE COUNTY...RESULTING IN 
LOCALIZED FLASH FLOODING...ESPECIALLY IN AREAS SUCH AS PHILLIPSBURG 
AND PORT MATILDA.

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 4121 7792 4075 7835 4073 7769 4097 7750
LA CORTE

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 3:47 PM EDTFlash Flood WarningCTPTioga3 hr
Aug 9, 5:02 PM EDTSevere Thunderstorm WarningCTPClearfield58 min
Aug 9, 7:06 PM EDTFlash Flood WarningCTPTioga3 hr
Aug 9, 7:21 PM EDTFlash Flood WarningCTPMcKean3 hr
Aug 9, 7:32 PM EDTFlash Flood WarningCTPBlair, Clearfield3 hr
Aug 9, 7:42 PM EDTFlash Flood WarningCTPCameron3 hr

Nearby

Flash Flood Warnings in Pennsylvania, 2003Every flash flood warning in 2003

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; radar from the NEXRAD Level II archive.