Alert archive / Pennsylvania / Flash Flood Warnings in 2003

Flash Flood Warning 17, NWS State College, PA

August 9, 2003Tioga County, Pennsylvania

NWS State College, PA issued this flash flood warning at Aug 9, 2003, 3:47 PM EDT for Tioga 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, 3:47 PM EDT (19:47 UTC)
Expired
Aug 9, 2003, 6:45 PM EDT
In force
3 hr
Issued by
NWS State College, PA
Area
Whole counties

County Tioga County, PA

The radar

The State College radar (KCCX), 113 km from the middle of the area, began a volume at 19:51 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

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.8 hours before the alert went out and 175 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 2003-08-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 421 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, Buffalo Intl Airport, NY at 12:00Z on 2003-08-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 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
421 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
668 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
72 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

000 
WGUS51 KCTP 091948
FFWCTP
PAC117-092245-

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

THE NATIONAL WEATHER SERVICE IN STATE COLLEGE PA HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  TIOGA COUNTY IN NORTH CENTRAL PENNSYLVANIA

* UNTIL 645 PM EDT.

* AT 346 PM...A WEATHER SPOTTER REPORTED 2.5 INCHES OF RAIN IN 25 
MINUTES IN THE VICINITY OF HILLS CREEK LAKE...IN CENTRAL TIOGA 
COUNTY JUST OF NORTHEAST OF WELLSBORO.

SLOW MOVING THUNDERSTORMS CAN BE EXPECTED TO CONTINUE INTO THE 
EVENING HOURS...CREATING THE POTENTIAL FOR LOCALIZED FLASH FLOODING. 

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 4196 7695 4157 7694 4158 7758 4197 7757

LA CORTE/LIPTON
1 follow-up statement
000 
WGUS71 KCTP 092023
FFSCTP
PAC117-092215-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
416 PM EDT SAT AUG 9 2003


...A FLASH FLOOD WARNING CONTINUES FOR TIOGA COUNTY UNTIL
645 PM EDT...

AT 415 PM EDT...DOPPLER RADAR CONTINUED TO SHOW SLOW MOVING SHOWERS 
AND THUNDERSTORMS PRODUCING TORRENTIAL RAINS FROM ABOUT THE TOWN OF 
TIOGA WEST THROUGH WESTFIELD. EARLIER REPORTS INDICATED THAT MORE 
THAN 2.5 INCHES OF RAIN FELL IN LESS THAN 30 MINUTES FROM SOME OF 
THESE SHOWERS AND THUNDERSTORMS. 

EMERGENCY MANAGEMENT REPORTED PORTIONS OF SEVERAL ROADS CLOSED DUE 
TO FLOODING. CATLIN HOLLOW ROAD HAD SECTIONS CLOSED BETWEEN 
MIDDLEBURY AND WELLSBORO. DEAN HILL ROAD HAD PORTIONS CLOSED IN THE 
VICINITY OF WELLSBORO AND LOWER HILLS CREEK ROAD JUST EAST OF 
WELLSBORO WAS ALSO CLOSED.

SHOWERS AND THUNDERSTORMS WILL ONLY SLOWLY MOVE NORTH AND TAPER OFF 
BETWEEN 5 AND 7 PM. THE THREAT FOR FLOODING WILL CONTINUE OVER THE 
AREA THROUGH 645 PM.

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 4161 7759 4171 7694 4199 7695 4198 7759

LA CORTE

The office that day

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

IssuedProductOfficeCountiesLasted
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
Aug 9, 7:46 PM EDTFlash Flood WarningCTPCentre3 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.