Alert archive / Pennsylvania / Flash Flood Warnings in 2003

Flash Flood Warning 21, NWS Pittsburgh, PA

May 10, 2003Greene County, Pennsylvania

NWS Pittsburgh, PA issued this flash flood warning at May 10, 2003, 7:28 AM EDT for Greene County, Pennsylvania. It was in force for 4 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
May 10, 2003, 7:28 AM EDT (11:28 UTC)
Expired
May 10, 2003, 11:30 AM EDT
In force
4 hr
Issued by
NWS Pittsburgh, PA
Area
Whole counties

County Greene County, PA

The radar

The Pittsburgh radar (KPBZ), 75 km from the middle of the area, began a volume at 11:30 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, 11.5 hours before the alert went out and 63 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 2003-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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 2003-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 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
18 J/kg
Mixed-layer CIN
-278 J/kg
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS51 KPBZ 101134 RRA
FFWPBZ
PAC059-101530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
728 AM EDT SAT MAY 10 2003

THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  GREENE COUNTY IN PENNSYLVANIA

* UNTIL 1130 AM EDT

* AT 728 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED HEAVY RAINS
  MOVING THROUGH GREENE COUNTY OVER ALREADY SATURATED SOILS...
  WHICH WILL RESULT IN RAPID RUNOFF.  

<<CALL TO ACTION>>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.
1 follow-up statement
000 
WGUS71 KPBZ 101327
FFSPBZ
MDC023-PAC003-007-051-059-125-129-WVC077-101415-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
925 AM EDT SAT MAY 10 2003


FLASH FLOOD WARNINGS CONTINUE FOR THE FOLLOWING COUNTIES IN PENNSYLVANIA...
GREENE...FAYETTE...BEAVER...WASHINGTON...ALLEGHENY...WESTMORELAND

IN WEST VIRGINIA...
PRESTON...BROOKE...HANCOCK...MARSHALL

IN MARYLAND...
GARRETT

LIGHT TO MODERATE SHOWERS CONTINUED OVER A LARGE PORTION OF THE 
REGION THIS MORNING. HOWEVER...THUNDERSTORMS WITH HEAVY RAIN WERE 
MOVING ACROSS FAYETTE COUNTY. THESE WILL CONTINUE SOUTHEAST AT ABOUT 
35 MPH AND WILL MOVE INTO PARTS OF GARRETT COUNTY BY 1000 AM.

NUMEROUS STREAMS AND CREEKS WERE OUT OF THEIR BANKS. MANY ROADS WERE 
CLOSED. BE ESPECIALLY CAREFUL THIS MORNING. DO NOT DRIVE ACROSS ANY 
FLOODED ROADWAY.
$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 10, 2:21 AM EDTSevere Thunderstorm WarningPBZLawrence, Mercer54 min
May 10, 2:56 AM EDTSevere Thunderstorm WarningPBZBeaver, Butler, Lawrence64 min
May 10, 3:48 AM EDTSevere Thunderstorm WarningPBZArmstrong, Indiana57 min
May 10, 6:33 AM EDTSevere Thunderstorm WarningPBZGreene, Washington57 min
May 10, 7:12 AM EDTSevere Thunderstorm WarningPBZBeaver, Lawrence63 min
May 10, 7:17 AM EDTSevere Thunderstorm WarningPBZFayette58 min
May 10, 7:37 AM EDTFlash Flood WarningPBZFayette4 hr
May 10, 7:43 AM EDTFlash Flood WarningPBZBeaver4 hr
May 10, 7:47 AM EDTFlash Flood WarningPBZWashington4 hr
May 10, 8:06 AM EDTFlash Flood WarningPBZAllegheny, Westmoreland3 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.