Alert archive / Pennsylvania / Flash Flood Warnings in 2003

Flash Flood Warning 41, NWS Cleveland, OH

August 10, 2003Crawford County, Pennsylvania

NWS Cleveland, OH issued this flash flood warning at Aug 10, 2003, 7:35 AM EDT for Crawford 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 10, 2003, 7:35 AM EDT (11:35 UTC)
Expired
Aug 10, 2003, 10:30 AM EDT
In force
3 hr
Issued by
NWS Cleveland, OH
Area
Whole counties

County Crawford County, PA

The radar

The Pittsburgh radar (KPBZ), 129 km from the middle of the area, began a volume at 11:34 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 00:00Z, 11.6 hours before the alert went out and 142 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 00:00Z on 2003-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 444 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2003-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 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
444 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
848 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
32 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 KCLE 101136
FFWCLE
PAC039-101430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
735 AM EDT SUN AUG 10 2003

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA...

* UNTIL 1030 AM EDT

* AT 727 AM EDT WEATHER SERVICE RADAR INDICATED A CLUSTER OF SHOWERS
  AND THUNDERSTORMS THAT WERE DROPPING LOCALLY HEAVY RAIN.  THE      
  STORMS WERE NEARLY STATIONARY. 

* SOME LOCATIONS AFFECTED INCLUDE...
  LINESVILLE
  MEADVILLE

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT LET YOUR CHILDREN PLAY NEAR DRAINAGE DITCHES, STORM SEWERS OR
STREAMS.

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF
CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS
COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

$$

LOMBARDY
1 follow-up statement
000 
WGUS71 KCLE 101501
FFSCLE
PAC039-101545-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1039 AM EDT SUN AUG 10 2003

...THE FLASH FLOOD WARNING FOR CRAWFORD COUNTY HAS EXPIRED...

THE SHOWERS AND ISOLATED THUNDERSTORMS THAT CAUSED THE FLOODING THIS 
MORNING HAD DECREASED IN COVERAGE. RADAR ESTIMATED THAT AT LEAST 1.5 
TO 2 INCHES OF RAIN FELL EARLIER THIS MORNING. OVER AN INCH FELL IN 
ONE HOUR FROM SAEGERTOWN SOUTH TO MEADVILLE AND COCHRANTON.

SOME ROADS WERE STILL COVERED WITH WATER ACROSS THESE AREAS AND 
SEVERAL ROADS WERE REPORTED WASHED OUT. SHOWERS AND THUNDERSTORMS 
AREA EXPECTED AGAIN THROUGH THE AFTERNOON AND THE POTENTIAL FOR SOME 
HEAVY RAIN WILL CONTINUE.

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. ALSO SOME ROADWAYS COULD BE WASHED OUT UNDER THE HIGH WATER.

BM

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 10, 3:37 PM EDTFlash Flood WarningCLECrawford4 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.