Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 97, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at Jul 6, 1991, 3:15 PM EDT for Venango County, Pennsylvania. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 6, 1991, 3:15 PM EDT (19:15 UTC)
- Expired
- Jul 6, 1991, 4:15 PM EDT
- In force
- 60 min
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Venango County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 6, 4:00 PM EDT | Thunderstorm Wind 0 | Venango, PA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 7.3 hours before the alert went out and 191 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
- 687 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 876 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.9
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 severe thunderstorm 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, Jul 6, 1:14 PM EDT, 2 hours 1 minute before
OHZ004-007-061900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AKRON CANTON OH 112 PM EDT SAT JUL 6 1991 THUNDERSTORMS...PRODUCING VERY HEAVY RAIN...HAD DEVELOPED OVER PARTS OF NORTHEAST OHIO EARLY THIS AFTERNOON. AT 1:10 PM WEATHER RADAR INDICATED THE HEAVIEST RAINFALL OVER CENTRAL PORTAGE COUNTY. WIDELY SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP THE REMAINDER OF THIS AFTERNOON AND EVENING OVER EASTERN OHIO. SOME OF THESE STORMS WILL BE CAPABLE OF DROPPING OVER AN INCH OF RAIN IN LESS THAN AN HOUR. RAINFALL OF THIS INTENSITY WILL CAUSE BRIEF PONDING OF WATER ON ROADWAYS AND IN LOW LYING AREAS. MOTORISTS SHOULD ALSO BE ALERT FOR GREATLY REDUCED VISIBILITIES. THOMPSON
Special weather statement, Jul 6, 2:31 PM EDT, 44 minutes before
OHZALL-062100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OHIO 230 PM EDT FRI JUL 5 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF NORTHEAST AND EASTCENTRAL OHIO UNTIL 1000 PM EDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHEAST AND EASTCENTRAL OHIO UNTIL 1000 PM EDT. SOME CITIES INCLUDED IN THIS WATCH ARE AKRON...CANTON...YOUNGSTOWN... ASHTABULA...AND STEUBENVILLE. AT 230 PM EDT RADAR SHOWED SCATTERED THUNDERSTORMS LINED UP FROM JUST EAST OF AKRON TO THE YOUNGSTOWN AREA TO THE FRANKLIN AREA OF PENNSYLVANIA. THE THUNDERSTORMS WERE POPPING UP AND DOWN RATHER QUICKLY AS THEY MOVED EAST AT ABOUT 30 MPH. ANY OF THE THUNDERSTORMS OVER NORTHEAST AND EASTCENTAL OHIO CAN BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. VERY HEAVY DOWNPOURS OF RAIN CAN ALSO OCCUR WITH TEMPORARY URBAN AND DRAINING SYSTEM FLOODING THE RESULT. THE REMAINDER OF OHIO ALSO HAS A CHANCE OF SHOWERS AND THUNDERSTORMS FOR THIS AFTERNOON THROUGH TONIGHT. KAPELA
Special weather statement, Jul 6, 2:36 PM EDT, 39 minutes before
OHZALL-062100- SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE CLEVELAND OHIO 230 PM EDT SAT JUL 6 1991 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PARTS OF NORTHEAST AND EASTCENTRAL OHIO UNTIL 1000 PM EDT... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHEAST AND EASTCENTRAL OHIO UNTIL 1000 PM EDT. SOME CITIES INCLUDED IN THIS WATCH ARE CANTON...YOUNGSTOWN...ASHTABULA... AND STEUBENVILLE. AT 230 PM EDT RADAR SHOWED SCATTERED THUNDERSTORMS LINED UP FROM JUST EAST OF AKRON TO THE YOUNGSTOWN AREA TO THE FRANKLIN AREA OF PENNSYLVANIA. THE THUNDERSTORMS WERE POPPING UP AND DOWN RATHER QUICKLY AS THEY MOVED EAST AT ABOUT 30 MPH. ANY OF THE THUNDERSTORMS OVER NORTHEAST AND EASTCENTAL OHIO CAN BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. VERY HEAVY DOWNPOURS OF RAIN CAN ALSO OCCUR WITH TEMPORARY URBAN AND DRAINING SYSTEM FLOODING THE RESULT. THE REMAINDER OF OHIO ALSO HAS A CHANCE OF SHOWERS AND THUNDERSTORMS FOR THIS AFTERNOON THROUGH TONIGHT. KAPELA CORRECTED FOR DATE AND CITIES INCLUDED IN WATCH
Special weather statement, Jul 6, 2:55 PM EDT, 20 minutes before
PAZ003-062000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 250 PM EDT SAT JUL 06 1991 ...THUNDERSTORMS PRODUCING HEAVY RAIN AND INTENSE LIGHTNING OVER SOUTHERN VENANGO COUNTY OF NORTHWEST PENNSYLVANIA... ...SEVERE THUNDERSTORM WATCH UNTIL 1000 PM FOR ALL OF WESTERN PENNSYLVANIA EXCEPT ERIE COUNTY... AT 240 PM EDT WEATHER RADAR SHOWED A LINE OF THUNDERSTORMS EXTENDING FROM YOUNGSTOWN OHIO EASTWARD TO DUBOIS TO SOUTHERN CAMERON COUNTY. THE LINE OF THUNDERSTORMS WAS DRIFTING SLOWLY TO THE SOUTH. THE THUNDERSTORMS CELLS WITHIN THE LINE WERE MOVING TO THE EAST AT ABOUT 30 MILES AN HOUR. THE STATE POLICE IN VENANGO COUNTY REPORTED VERY HEAVY RAIN AND INTENSE LIGHTNING NEAR INTERSTATE 80 IN SOUTHERN VENANGO COUNTY. OTHER THUNDERSTORMS CELLS MOVING EAST FROM MERCER COUNTY WILL MOVE THROUGH SOUTHERN VENANGO COUNTY WITHIN THE NEXT HOUR. THESE THUNDERSTORMS WILL CONTINUE TO BRING VERY HEAVY RAIN AND DANGEROUS LIGHTNING TO SOUTHERN VENANGO COUNTY. AS THESE STORMS CONTINUE TO MOVE ACROSS THE SAME AREAS... SOME FLOODING MAY DEVELOP ALONG SMALL STREAMS AND LOW LYING AREAS. TRAVELERS ALONG INTERSTATE 80 SHOULD BE PREPARED FOR VERY HEAVY DOWNPOURS THAT MAY CAUSE PONDING OF WATER ON ROAD SURFACES AND POOR VISIBILITY. STAY TUNED TO NOAA WEATHER RADIO FOR MORE UPDATES OR POSSIBLE WARNINGS. TJP
The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 3:05 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning | 55 min |
| Jul 6, 4:13 PM EDT | Flash Flood Warning | CLE | Mahoning | 62 min |
| Jul 6, 4:13 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning | 62 min |
| Jul 6, 5:18 PM EDT | Flash Flood Warning | CLE | Mahoning | 57 min |
| Jul 6, 5:18 PM EDT | Severe Thunderstorm Warning | CLE | Mahoning | 57 min |
| Jul 6, 2:18 PM EDT | Severe Thunderstorm Warning | CLE | Mercer | 57 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1991Every severe thunderstorm 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.