Alert archive / Pennsylvania / Flash Flood Warnings in 1991
Flash Flood Warning 20, NWS Cleveland, OH
NWS Cleveland, OH issued this flash flood warning at Aug 20, 1991, 5:19 PM EDT for Lawrence County, Pennsylvania. It was in force for 116 min.
The area
The counties it named.
The facts
- Issued
- Aug 20, 1991, 5:19 PM EDT (21:19 UTC)
- Expired
- Aug 20, 1991, 7:15 PM EDT
- In force
- 116 min
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Lawrence County, PA
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 9.3 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
- 291 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 652 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KYNG 202120 FFWYNG PAC073-202315- BULLETIN - EBS ACTIVATION REQUESTED SMALL STREAM FLOOD WARNING NATIONAL WEATHER SERVICE YOUNGSTOWN OH 519 PM EDT TUE AUG 20 1991 THE NATIONAL WEATHER SERVICE IN YOUNGSTOWN HAS ISSUED A SMALL STREAM FLOOD WARNING EFFECTIVE UNTIL 715 PM EDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHWEST PENNSYLVANIA ... SOUTHERN LAWRENCE COUNTY AT 515 PM WEATHER RADAR SHOWED A STRONG THUNDERSTORM IN EXTREME SOUTHWESTERN LAWRENCE COUNTY. MOVEMENT WAS TO THE EAST AT 5 TO 10 MPH. THIS STORM IS PRODUCING RAINFALL OF 1 TO 2 INCHES PER HOURS. 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 CR`OSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. SITES
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, Aug 20, 2:25 PM EDT, 2 hours 54 minutes before
OHZALL-201930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 225 PM EDT TUE AUG 20 1991 HEAVY RAIN WAS FALLING ON PARTS OF NORTHERN OHIO THIS AFTERNOON. AT 225 THIS AFTERNOON WEATHER RADAR SHOWED SHOWERS AND THUNDERSTORMS OVER THE EASTERN SUBURBS OF CLEVELAND TO RAVENNA AND SEBRING. THESE STORMS WERE PRODUCING ONE TO TWO INCHES OF RAIN PER HOUR. A NATIONAL WEATHER SERVICE OBSERVER IN TWINSBURG REPORTED ONE AND EIGHT TENTHS /1.80"/ INCHES OF RAIN WITH THESE THUNDERSTORMS. OTHER THUNDERSTORMS WERE ALONG THE LAKESHORE FROM SANDUSKY TO VERMILION... LORAIN AND CLEVELAND. THESE STORMS WERE MOVING SLOWLY SOUTH AND WILL AFFECT ERIE... LORAIN AND CUYAHOGA COUNTY THROUGH FOUR O'CLOCK THIS AFTERNOON. THIS HEAVY RAIN WILL CAUSE SOME PONDING OF WATER IN UNDERPASSES AND LOW AREAS... BUT DUE TO THE DROUGHT... MUCH OF THE WATER SHOULD GET ABSORBED INTO THE VERY DRY GROUND. REMEMBER... DON'T DRIVE ON ROADS THAT HAVE WATER RUSHING OR FLOWING OVER IT. THE WATER COULD BE DEEPER THAN YOU THINK AND IT ONLY TAKES A COUPLE OF FEET OF WATER TO CARRY AWAY MOST CARS. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. ECKERT
Special weather statement, Aug 20, 3:32 PM EDT, 1 hour 47 minutes before
OHZALL-202035- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 333 PM EDT TUE AUG 20 1991 HEAVY RAIN WAS FALLING ON PARTS OF NORTHERN OHIO THIS AFTERNOON... WHILE FUNNEL CLOUDS WERE BEING REPORTED IN SOUTHWEST OHIO. AT 325 THIS AFTERNOON WEATHER RADAR SHOWED A BAND OF SHOWERS AND THUNDERSTORMS FROM NEAR PORT CLINTON TO LORAIN AND CLEVELAND. IT THEN HEADED SOUTHEAST TO AKRON AND LISBON. THESE AREA OF RAIN HAS BEEN PRODUCING RAINFALL AMOUNTS OF ONE TO TWO INCHES PER HOUR. ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WAS FROM CARROLLTON TO KILLBUCK THEN SOUTHWEST TO NEWARK... CIRCLEVILLE AND INTO THE CINCINNATI AREA. THESE THUNDERSTORMS HAVE BEEN PRODUCING FUNNEL CLOUDS NEAR THE KINGS ISLAND AMUSEMENT PARK AND ONE DID TOUCH DOWN INSIDE THE PART. THE ACTIVITY OVER NORTHERN OHIO WAS MOVING SOUTH... WHILE THE STORMS O SOUTHERN OHIO WERE MOVING TO THE SOUTHEAST. SPEEDS WERE AROUND 15 MPH. THE HEAVY RAIN THAT THESE STORMS ARE PRODUCING WILL CAUSE SOME PONDING OF WATER IN UNDERPASSES AND LOW AREAS... BUT DUE TO THE DROUGHT... MUCOF THE WATER SHOULD BE ABSORBED INTO THE VERY DRY GROUND. REMEMBER... DON'T DRIVE ON ROADS THAT HAVE WATER RUSHING OR FLOWING OVER IT. THE WATER COULD BE DEEPER THAN YOU THINK AND IT ONLY TAKES A COUPLE OF FEET OF WATER TO CARRY AWAY MOST CARS. THE FUNNEL CLOUDS AND TORNADOES THAT ARE DEVELOPING THIS AFTERNOON ARE MUCH WEAKER THAN THE TORNADOES WE NORMALLY HEAR ABOUT DURIpNG THE SPRING MONTHS... BUT IF THEY DO TOUCHDOWN THEY STILL CAN DO DAMAGE. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. ECKERT
Special weather statement, Aug 20, 3:37 PM EDT, 1 hour 42 minutes before
OHZALL-202035- SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE CLEVELAND OH 336 PM EDT TUE AUG 20 1991 HEAVY RAIN WAS FALLING ON PARTS OF NORTHERN OHIO THIS AFTERNOON... WHILE FUNNEL CLOUDS WERE BEING REPORTED IN SOUTHWEST OHIO. AT 325 THIS AFTERNOON WEATHER RADAR SHOWED A BAND OF SHOWERS AND THUNDERSTORMS FROM NEAR PORT CLINTON TO LORAIN AND CLEVELAND. IT THEN HEADED SOUTHEAST TO AKRON AND LISBON. THESE AREA OF RAIN HAS BEEN PRODUCING RAINFALL AMOUNTS OF ONE TO TWO INCHES PER HOUR. ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WAS FROM CARROLLTON TO KILLBUCK THEN SOUTHWEST TO NEWARK... CIRCLEVILLE AND INTO THE CINCINNATI AREA. THESE THUNDERSTORMS HAVE BEEN PRODUCING FUNNEL CLOUDS NEAR THE KINGS ISLAND AMUSEMENT PARK AND ONE DID TOUCH DOWN INSIDE THE PARK. THE ACTIVITY OVER NORTHERN OHIO WAS MOVING SOUTH... WHILE THE STORMS OVER SOUTHERN OHIO WERE MOVING TO THE SOUTHEAST. SPEEDS WERE AROUND 15 MPH. THE HEAVY RAIN THAT THESE STORMS ARE PRODUCING WILL CAUSE SOME PONDING OF WATER IN UNDERPASSES AND LOW AREAS... BUT DUE TO THE DROUGHT... MUCH OF THE WATER SHOULD BE ABSORBED INTO THE VERY DRY GROUND. REMEMBER... DON'T DRIVE ON ROADS THAT HAVE WATER RUSHING OR FLOWING OVER IT. THE WATER COULD BE DEEPER THAN YOU THINK AND IT ONLY TAKES A COUPLE OF FEET OF WATER TO CARRY AWAY MOST CARS. THE FUNNEL CLOUDS AND TORNADOES THAT ARE DEVELOPING THIS AFTERNOON ARE MUCH WEAKER THAN THE TORNADOES WE NORMALL_Y HEAR ABOUT DURING THE SPRING MONTHS... BUT IF THEY DO TOUCHDOWN THEY STILL CAN DO DAMAGE. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. ECKERT CORRECTED TYPOS
Special weather statement, Aug 20, 4:25 PM EDT, 54 minutes before
OHZALL-202130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 425 PM EDT TUE AUG 20 1991 THUNDERSTORMS WITH HEAVY RAIN WERE MOVING ACROSS NORTHERN OHIO... WHILE FUNNEL CLOUDS HAVE BEEN SIGHTED IN SOUTHWEST OHIO. AT 420 THIS AFTERNOON WEATHER RADAR SHOWED THUNDERSTORMS FROM BELLEVUE TO VERMILION... LORAIN AND CLEVELAND. OTHER THUNDERSTORMS WERE FROM LISBON TO STEUBENVILLE... AND FROM DOVER TO ZANESVILLE AND CHILLICOTHE. THESE THUNDERSTORMS WERE PRODUCING TORRENTIAL RAINFALL OF ONE TO TWO INCHES PER HOUR... WHICH IS CAUSING SOME PONDING OF WATER IN LOW AREAS LIKE UNDERPASSES. REMEMBER IT ONLY TAKES A COUPLE OF FEET OF WATER TO CARRY AWAY MOST CARS. ALSO... THE THUNDERTORMS IN SOUTHERN OHIO HAVE BEEN PRODUCING SOME FUNNELS CLOUDS. ONE OF THESE FUNNEL CLOUDS TOUCHED DOWN AT THE KINGS ISLAND AMUSEMENT PARK CAUSING SOME DAMAGE. THESE FUNNEL CLOUDS AND TORNADOES ARE MUCH WEAKER THAN THE TORNADOES THAT CAN OCCUR DURING VERY WARM DAYS IN THE SPRING... BUT THEY CAN STILL CAUSE DAMAGE. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. ECKERT
Special weather statement, Aug 20, 5:08 PM EDT, 11 minutes before
OHZALL-202200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AKRON OH 505 PM EDT TUE AUG 20 1991 THUNDERSTORMS WITH HEAVY RAIN WERE MOVING ACROSS EASTERN OHIO. AT 5 OCLOCK THIS AFTERNOON WEATHER RADAR SHOWED THUNDERSTORMS IN THE OHIO VALLEY FROM WHEELING WEST VIRGINIA TO 10 MILES SOUTH OF YOUNGSTOWN PRODUCING VERY HEAVY RAIN OVER EASTERN COLUMBIANA COUNTY. HEAVY RAIN WAS ALSO FALLING FROM THUNDERSTORMS IN EAST CENTRAL OHIO FROM CAMBRIDGE SOUTH INTO NOBLE...MUSKINGUM AND MORGAN COUNTIES...AND IN THE OHIO VALLEY AROUND SAINT CLAIRSVILLE AND WHEELING. THESE THUNDERSTORMS WERE PRODUCING TORRENTIAL RAINFALL OF ONE TO TWO INCHES PER HOUR... WHICH IS CAUSING SOME PONDING OF WATER IN LOW AREAS LIKE UNDERPASSES. THE STORMS WERE MOVING VERY SLOWLY EAST. REMEMBER IT ONLY TAKES A COUPLE OF FEET OF WATER TO CARRY AWAY MOST CARS. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. RN
Special weather statement, Aug 20, 5:12 PM EDT, 7 minutes before
OHZ004-007-202200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AKRON OH 505 PM EDT TUE AUG 20 1991 THUNDERSTORMS WITH HEAVY RAIN WERE MOVING ACROSS EASTERN OHIO. AT 5 OCLOCK THIS AFTERNOON WEATHER RADAR SHOWED THUNDERSTORMS IN THE OHIO VALLEY FROM WHEELING WEST VIRGINIA TO 10 MILES SOUTH OF YOUNGSTOWN PRODUCING VERY HEAVY RAIN OVER EASTERN COLUMBIANA COUNTY. HEAVY RAIN WAS ALSO FALLING FROM THUNDERSTORMS IN EAST CENTRAL OHIO FROM CAMBRIDGE SOUTH INTO NOBLE...MUSKINGUM AND MORGAN COUNTIES...AND IN THE OHIO VALLEY AROUND SAINT CLAIRSVILLE AND WHEELING. THESE THUNDERSTORMS WERE PRODUCING TORRENTIAL RAINFALL OF ONE TO TWO INCHES PER HOUR... WHICH IS CAUSING SOME PONDING OF WATER IN LOW AREAS LIKE UNDERPASSES. THE STORMS WERE MOVING VERY SLOWLY EAST. REMEMBER IT ONLY TAKES A COUPLE OF FEET OF WATER TO CARRY AWAY MOST CARS. LISTEN TO NOAA WEATHER RADIO OR YOUR LOCAL RADIO OR TV STATION FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS. RN CORRECTED ROUTING.
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.