Alert archive / Pennsylvania / Flash Flood Warnings in 1991
Flash Flood Warning 6, NWS Cleveland, OH
NWS Cleveland, OH issued this flash flood warning at May 13, 1991, 4:24 PM EDT for Lawrence County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- May 13, 1991, 4:24 PM EDT (20:24 UTC)
- Expired
- May 13, 1991, 6:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Lawrence County, PA
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 8.4 hours before the alert went out and 68 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.
- Mixed-layer CAPE
- 944 J/kg
- Mixed-layer CIN
- -40 J/kg
- Mixed-layer LCL
- 1106 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KYNG 132026 FFWYNG PAC073-132230- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE YOUNGSTOWN OH 424 PM EDT MON MAY 13 1991 THE NATIONAL WEATHER SERVICE IN YOUNGSTOWN HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 630 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWEST PENNSYLVANIA ...NORTHWESTERN LAWRENCE COUNTY AT 420 PM WEATHER RADAR SHOWED A THUNDERSTORM WITH VERY HEAVY RAIN OVER EXTREME NORTHWESTEN LAWRENCE COUNTY. THE STORM WAS MOVING VERY SLOWLY TO THE SOUTHEAST AT AROUND 8 MPH. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWIN,G STREAM...EVEN A SMALL ONE...ON FOOT.
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, May 13, 1:11 PM EDT, 3 hours 13 minutes before
PAZ001-002-003-131900 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 103 PM EDT MON MAY 13 1991 ...THUNDERSTORMS ARE DEVELOPING RAPIDLY ACROSS PORTIONS OF NORTHERN PENNSYLVANIA... DURING THE PAST HOUR ERIE WEATHER RADAR SHOWED RAPID DEVELOPMENT OF THUNDERSTORMS IN PARTS OF WARREN...MCKEAN...POTTER AND ELK COUNTIES IN NORTHERN PENNSYLVANIA. THESE STORMS ARE LIKELY TO PRODUCE VERY HEAVY DOWNPOURS AND EXCESSIVE LIGHTNING...AND POSSIBLY SOME HAIL AND STRONG WINDS. DUE TO AN UNSTABLE AIRMASS ACROSS THE DISTRICT...THUNDERSTORMS ARE LIKELY TO CONTINUE ACROSS NORTHWEST PENNSYLVANIA AND THE NORTHERN MOUNTAINS... THROUGHOUT THE AFTERNOON HOURS. SANDSTROM/WELLS
Special weather statement, May 13, 2:14 PM EDT, 2 hours 10 minutes before
PAZ002-003-004-132000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 204 PM EDT MON MAY 13 1991 ...STRONG THUNDERSTORMS ARE CONTINUING ACROSS PARTS OF NORTHWEST PENNSYLVANIA AND THE NORTHERN MOUNTAINS... AT 2 PM ERIE WEATHER RADAR INDICATED STRONG THUNDERSTORMS IN PARTS OF WARREN... MCKEAN...POTTER...ELK AND CAMERON COUNTIES IN PENNSYLVANIA. THE STORMS WERE MOVING TO THE EAST SOUTHEAST AT AROUND 20 MILES AN HOUR. SOME OF THESE STORMS ARE PRODUCING VERY HEAVY RAIN THAT MAY CAUSE SOME FLOODING OF LOWLANDS AND POOR DRAINAGE AREAS...EXCESSIVE LIGHTNING...AND POSSIBLY SOME HAIL AND STRONG WINDS. PERSONS SHOULD KEEP A LOOKOUT FOR THREATENING WEATHER...AS THESE STORMS SHOULD CONTINUE THROUGHOUT THE AFTERNOON HOURS. SANDSTROM/WELLS/REEDY
Special weather statement, May 13, 2:26 PM EDT, 1 hour 58 minutes before
OHZALL-DDHHMM- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 225 PM EDT MON MAY 13 1991 THUNDERSTORMS WITH VERY HEAVY RAIN AND POSSIBLE HAIL WAS DEVELOPING OVER NORTHEAST OHIO THIS AFTERNOON. AT 210 THIS AFTERNOON CLEVELAND WEATHER RADAR INDICATED THE THUNDERSTORMS WITH VERY HEAVY RAINS DEVELOPING ALONG A LAKE BREEZE FRONT THAT WAS FROM NORWALK TO AKRON TO NEW CASTLE PENNSYLVANIA. THE OHIO LAKESHORE COUNTIES SOUTHWEST AND SOUTH OF CLEVELAND SHOULD BE ON THE LOOK OUT FOR LOCALLY HEAVY RAINS AS THE THUNDERSTORMS DEVELOP AND MOVE SOUTHEAST AT 10 TO 15 MILES AN HOUR. THOMPSON
Special weather statement, May 13, 2:41 PM EDT, 1 hour 43 minutes before
OHZ004-PAZ003-132000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE YOUNGSTOWN OH 240 PM EDT MON MAY 13 1991 SCATTERED THUNDERSTORMS WERE DEVELOPING OVER NORTHEASTERN OHIO AND WESTERN PENNSYLVANIA THIS AFTERNOON. AT 230 PM WEATHER RADAR SHOWED THUNDERSTORMS SCATTERED ALONG A LINE BETWEEN CANTON-AKRON AND YOUNGSTOWN. THUNDERSTORMS WERE ALSO SCATTERED IN MERCER AND LAWRENCE COUNTIES IN PENNSYLVANIA. SOME OF THESE THUNDERSTORMS WERE PRODUCING HEAVY DOWNPOURS. HAIL IS ALSO POSSIBLE WITH THESE STORMS. PEOPLE IN THE IN THE PATH OF THESE STORMS CAN EXPECT BRIEF PERIODS OF VERY HEAVY RAIN... STRONG GUSTY WINDS AND LIGHTNING. NICK
Special weather statement, May 13, 3:37 PM EDT, 47 minutes before
OHZ001-002-132100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TOLEDO OH 335 PM EDT MON MAY 13 1991 THUNDERSTORMS WITH VERY HEAVY RAIN AND POSSIBLY SMALL HAIL WERE DEVELOPING OVER EXTREME NORTHWEST OHIO THIS AFTERNOON. AT 330 PM NATIONAL WEATHER SERVICE RADAR INDICATED THE STRONGEST THUNDERSTORMS FROM 7 MILES NORTH OF SWANTON OHIO INTO NORTHWEST TOLEDO. THESE THUNDERSTORMS WERE MOVING EAST AT 15 MILES AN HOUR. BY 430 PM THESE STORMS WIKLL EXTEND FROM NORTHEAST LUCAS COUNTY INTO MAUMEE BAY. RAR
Special weather statement, May 13, 4:00 PM EDT, 24 minutes before
OHZ004-007-DDHHHH-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AKRON CANTON OH
130 PM EDT MON MAY 13 1991
THUNDERSTORMS WERE DEVELOPING OVER PART OF NORTHEAST OHIO EARLY THIS
AFTERNOON.
AT 220 PM EDT...WEATHER RADAR SHOWED SEVERAL THUNDERSTORMS ON AN
EAST-WEST LINE FROM MEDINA THROUGH AKRON PASSING SOUTH OF YOUNGSTOWN
TO NEW CASTLE PENNSYLVANIA.
A FEW OF THE THUNDERSTORMS HAD TORRENTIAL DOWNPOURS AND MAY PRODUCE
HAIL THIS AFTERNOON AND EVENING. THE THUNDERSTORMS WERE MOVING EAST
ALONG THE LINE AT ONLY 10 TO 15 MPH...SO MAY CAUSE SOME LOCAL PONDING
OF WATER IN LOW PLACES. THE DOWNPOURS MAY ALSO CAUSE SOME PROBLEMS
FOR MOTORISTS.
NIBERT {The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 13, 2:51 PM EDT | Flash Flood Warning | CLE | Cameron, Elk | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1991Every 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.