Alert archive / West Virginia / Flash Flood Warnings in 1991

Flash Flood Warning 2, NWS Pittsburgh, PA

April 9, 1991Hancock County, West Virginia

NWS Pittsburgh, PA issued this flash flood warning at Apr 9, 1991, 8:13 PM EDT for Hancock County, West Virginia. It was in force for 92 min.

The area

The counties it named.

The facts

Issued: Apr 9, 1991, 8:13 PM EDT (00:13 UTC)
Expired: Apr 9, 1991, 9:45 PM EDT
In force: 92 min
Issued by: NWS Pittsburgh, PA
Area: Whole counties

County Hancock County, WV

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 0.2 hours before the alert went out and 42 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1083 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1382 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Apr 9, 2:33 PM EDT, 5 hours 40 minutes before

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Special weather statement, Apr 9, 6:50 PM EDT, 1 hour 23 minutes before

RADAR SUMMARY AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
640 PM EDT TUE APR 9 1991

...STRONG SHOWERS AND THUNDERSTORMS APPROACHING WESTERN PENNSYLVANIA...

AT 630 PM...THE PITTSBURGH WEATHER SERVICE RADAR SHOWED SCATTERED
SHOWERS AND STRONG THUNDERSTORMS OVER EASTERN OHIO STARTING TO MOVE
INTO THE NORTHERN PANHANDLE OF WEST VIRGINIA AND WESTERN PENNSYLVANIA.

THE STRONGEST THUNDERSTORMS WERE CURRENTLY OVER EXTREME EASTERN OHIO...
MIANLY 50 MILES EITHER SIDE OF A LINE FROM 25 MILES EAST OF CLEVELAND
OHIO TO NORTH OF CHARLESTON WEST VIRGINIA.

SOME OF THESE STORMS WILL PRODUCE BRIEF HEAVY DOWNPOURS...SMALL HAIL
...STRONG WINDS AND DANGEROUS LIGHTNING.

THESE SHOWER<S AND THUNDERSTORMS WILL BE OVER WESTERN PENNSYLVANIA BY
735 PM...AROUND THE SAME TIME AS THE PIRATES BASEBALL GAME. A TORNADO
WATCH REMAINS IN EFFECT UNTIL MIDNIGHT FOR THE WESTERN THIRD OF
PENNSYLVANIA.                     KOHLHAGEN/REHAK

Special weather statement, Apr 9, 7:43 PM EDT, 30 minutes before

RADAR SUMMARY AND SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
740 PM EDT TUE APR 9 1991

...STRONG SHOWERS AND THUNDERSTORMS APPROACHING WESTERN PENNSYLVANIA...

AT 730 PM...THE PITTSBURGH WEATHER SERVICE RADAR SHOWED SCATTERED
SHOWERS AND STRONG THUNDERSTORMS MOVING FROM EASTERN OHIO INTO AND
ACROSS THE NORTHERN PANHANDLE OF WEST VIRGINIA AND WESTERN PENNSYLVANIA.

THE STRONGEST THUNDERSTORMS WERE OVER EXTREME EASTERN OHIO...AND
WESTERN PENNSYLVANIA...40 MILES EITHER SIDE OF A LINE FROM 30 MILES
EAST OF ERIE PA TO 30 MILES SOUTH OF ELKINS WEST VIRGINIA.

SOME OF THESE STORMS WILL PRODUCE BRIEF HEAVY DOWNPOURS...SMALL HAIL
...STRONG WINDS AND DANGEROUS LIGHTNING.

THESYE SHOWERS AND THUNDERSTORMS WILL BE IN DOWNTOWN PITTSBURGH BY
8 PM. A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT FOR THE WESTERN
THIRD OF PENNSYLVANIA.
                               KOHLHAGEN/REHAK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 8:13 PM EDT	Flash Flood Warning	PBZ	Allegheny, Beaver, Greene, Washington	3 hr
Apr 9, 8:36 PM EDT	Severe Thunderstorm Warning	PBZ	Cambria, Indiana, Somerset	54 min
Apr 9, 8:46 PM EDT	Tornado Warning	PBZ	Fayette	119 min
Apr 9, 9:10 PM EDT	Flash Flood Warning	PBZ	Armstrong, Butler	2 hr
Apr 9, 9:24 PM EDT	Severe Thunderstorm Warning	PBZ	Bedford, Blair	66 min
Apr 9, 9:24 PM EDT	Severe Thunderstorm Warning	PBZ	Clearfield, Jefferson	66 min
Apr 9, 9:36 PM EDT	Tornado Warning	PBZ	Bedford	54 min
Apr 9, 8:13 PM EDT	Flash Flood Warning	PBZ	Brooke, Marshall, Ohio	92 min

Nearby

Flash Flood Warnings in West Virginia, 1991 Every flash flood warning in 1991

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.