Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 77, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at Jul 25, 1987, 5:11 PM EDT for Venango County, Pennsylvania. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Jul 25, 1987, 5:11 PM EDT (21:11 UTC)
- Expired
- Jul 25, 1987, 6:05 PM EDT
- In force
- 54 min
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Venango County, PA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 9.2 hours before the alert went out and 114 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
- 1725 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 856 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KERI 252111 SVRERI PAC121-252205- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ERIE PA 511 PM EDT SAT JUL 25 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 605 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHWEST PENNSYLVANIA...VENANGO AT 500 PM EDT ERIE WEATHER RADAR INDICATED A SEVERE THUNDER STORM IN SOUTHWESTERN VENANGO COUNTY...MOVING TO THE EAST SOUTHEAST AT AROUND 20 MILES AN HOUR. THESE STORMS WILL CAUSE SOME FLOODING OF SMALL STREAMS AND LOW LYING AREAS. THESE STORMS ARE ACCOMPANIED BY DANGEROUS LIGHTNING..STRONG GUSTY WINDS AND HAIL.
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 25, 3:02 PM EDT, 2 hours 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 300 PM EDT SAT JUL 25 1987 THUNDERSTORMS WERE DEVELOPING RAPIDLY ALONG THE LAKE ERIE SHORE THIS AFTERNOON. CLEVELAND WEATHER RADAR AT 300 PM EDT SHOWS A LINE OF THUNDERSTORMS ALONG THE LAKE ERIE SHORE FROM TOLEDO THROUGH SANDUSKY..NORTHERN LORAIN COUNTY.. CLEVELAND THEN INLAND ACROSS SOUTHERN GEAUGA AND NORTHERN TRUMBULL COUNTY. THE LINE OF THUNDERSTORMS CONTINUE EAST INTO NORTHWEST PENNSYLVANIA. THESE THUNDERSTOMS WERE MOVING EAST ABOUT 30 MPH. THE NORTHERN OHIO COUNTIES WILL HAVE SOME PASSING THUNDERSTORMS THIS AFTERNOON AND WILL LIKELY CONTINUE IN SCATTERED AREAS ACROSS OHIO EARLY TONIGHT. PEOPLE IN THE NORTHERN OHIO @COUNTIES SHOULD STAY ALERT TO DEVELOPING THUNDERSTORMS AND TAKE COVER IF SKIES BECOME UNUSUALLY THREATENING. MONTGOMERY
Special weather statement, Jul 25, 3:41 PM EDT, 1 hour 30 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 332 PM EDT SAT JUL 25 1987 ...SEVERE THUNDERSTORM WATCH IN AFFECT UNTIL 8PM EDT THIS EVENING... AT 3:30PM EDT..ERIE WEATHER RADAR SHOWS A LINE OF STRONG THUNDERSTORMS FROM SOUTHERN NEW YORK..ACROSS NORTHWEST PENNSYLVANIA..INTO NORTHEAST OHIO. THE HEAVIEST STORMS ARE OCCURING IN CRAWFORD COUNTY IN NORTHWEST PENNSYLVANIA..EXTENDING INTO TRUMBULL AND ASHTABULA COUNTIES IN NORTHEAST OHIO. OTHER VERY HEAVY STORMS WERE NOTED IN CATTARAUGUS COUNTY IN NEW YORK. NO SEVERS WEATHER HAS BEEN REPORTED THUS FAR. THE STORMS MAY PRODUCE HEAVY RAINS..HAIL..STRONG GUSTY WINDS. PERSONS IN THE WATCH AREA SHOULD BE ALERT FOR THREATENING CONDITIlONS AND STAY TUNED TO THE NOAA WEATHER RADIO FOR FURTHER DETAILS. RLW/ERIE
Special weather statement, Jul 25, 3:58 PM EDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE AKRON CANTON OH 355 PM EDT SAT JUL 25 1987 AT 350 PM EDT RADAR INDICATED A STRONG LINE OF THUNDERSTORMS FROM GRAFTON OHIO EAST ACROSS NORTHERN SUMMIT AND PORTAGE COUNTIES OF OHIO. THIS LINE IS MOVING EAST SOUTHEAST AT ABOUT 20 MPH. THIS LINE SHOULD MOVE THRU THE AKRON CANTON AREA WITHIN THE NEXT 1 TO 2 HOURS. PEOPLE IN THIS AREA SHOULD STAY ALERT TO DEVELOPING THUNDERSTORM ACTIVITY IN THE~IR AREAS. E
Special weather statement, Jul 25, 4:38 PM EDT, 33 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE YOUNGSTOWN OH 435 PM EDT SAT JUL 25 1987 AT 430 PM NATIONAL WEATHER SERVICE RADAR SHOWED HEAVY THUNDERSTORMS OVER MERCER COUNTY IN PENNSYLVANIA AND TRUMBULL COUNTY IN OHIO. THESE STORMS WERE PART OF A LINE THAT EXTENDED FROM FRANKLIN TO TO WARREN TO WEST OF CLEVELAND. THESE STORMS WERE MOVING SOUTHEAST AT 30 MPH. THESE STORMS WILL CONTAIN DANGEROUS LIGHTNING...VERY HEAVY RAIN... AND STRONG GUSTY WINDS. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR WESTERN PENNSYLVANIA AND NORTHERN OHIO THIS AFTERNOON AND EARLY THIS EVENING. PEOPLE THROUGHOUT THIS AREA SHOULD BE PREPARED TO MOVE TO SAFE SHELTER IF THUNDERSTORMS APPROACH. TAYLOR
Special weather statement, Jul 25, 4:47 PM EDT, 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 450 PM EDT SAT JUL 25 1987 A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE NORTHERN TWO-THIRDS OF OHIO UNTIL 9 PM EDT. THE WATCH IS GENERALLY NORTH OF INTERSTATE 70. AT 445 PM EDT WEATHER RADAR SHOWED A LINE OF STRONG THUNDERSTORMS FROM DOWNTOWN TOLEDO THROUGH FREMONT... GRAFTON AND AKRON TO NORTH OF YOUNGSTOWN. THE STORMS IN THE LINE WERE MOVING SOUTHEAST AT 30 MPH WHILE THE LINE WAS SINKING SLOWLY SOUTH. THE STRONGEST STORMS WERE OVER THE NORTH SIDE OF AKRON AND 10 MILES NORTHWEST OF FREMONT. AT 420 PM EDT THE MEDINA COUNTY SHERIFF REPORTED WIND DAMAGE IN THE HINCKLEY AREA. A POLE BARN WAS DOWNED ALONG WITH TREES AND UTILITY LINES. THIS STORM MOVED INTO SUMMIT COUNTY AND A SEVERE THUNDERSTORM WILL BE IN EFFECT FOR THAT COUNTY UNTIL 540 PM EDT. THESE THUNDERSTORMS ARE JUST AHEAD OF A COLD FRONT THAT SHOULD MAKE ITS WAY INTO NORTHERN OHIO TONIGHT. THIS FRONT WILL NOT LOWER TEMPERATURES MUCH IN THE STATE UNTIL MONDAY OR TUESDAY. THE HEAT WAVE CONTINUED IN OHIO TODAY. TEMPERATURES CLIMBED INTO THE UPPER 80S TO THE LOWER 90S THROUGHOUT THE STATE. ALONG WITH THE HIGH TEMPERATURES CAME HIGH HUMIDITIES. SUNDAY WILL SEE MORE HEAT IN THE BUCKEYE STATE WITH SCATTERED THUNDERSTORMS. HIGHS SUNDAY WILL RANGE FROM THE MID 80S IN NORTHERN OHIO TO THE LOWER 90S ALONG THE OHIO RIVER. THE THUNDERSTORMS WILL DEVELOP DURING THE AFTERNOON AS THE HEAT ADD ENERGY TO THE ATMOSPHERE. ON THE WEATHER MAP THIS AFTERNOON A VERY SLOW MOVING COLD FRONT WAS JUST NORTH OF LAKE ERIE TO SOUTHERN IOWA. HIGH PRESSURE CONTINUED TO COVER THE SOUTHEAST UNITED STATES. THE COLD FRONT WILL MOVE INTO NORTHERN OHIO TONIGHT AND DRIFT TO CENTRAL COUNTIES BY SUNDAY EVENING. MAXIMUK
Special weather statement, Jul 25, 4:51 PM EDT, 20 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ERIE, PA 441 PM EDT SAT JUL 25 1987 ...A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT FOR NORTHWEST PENNSYLVANIA UNTIL 8 PM THIS EVENING... AT 440 PM ERIE WEATHER RADAR INDICATED HEAVY THUNDERSTORMS IN NORTHWEST PENNSYLVANIA FROM SOUTHERN CRAWFORD COUNTY...EXTENDING SOUTH INTO MERCER AND VENANGO COUNTIES. ANOTHER AREA OF STRONG THUNDERSRORMS WAS IN EASTERN WARREN COUNTY INTO MCKEAN COUNTY. NO SEVERE WEATHER HAS BEEN REPORTED WITH THESE STORMS. HOWEVER, THESE THUNDERSTORMS HAVE PRODUCED HEAVY RAINS...WITH 11/2 INCHES IN ONE HOUR AT GUYS MILLS...AND 1.2 INCHES IN 20 MINUTES REPORTED SOUTH OF COCHRANTON. THE THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT AROUND 20 MILES AN HOUR. AS INDICATED THESE STORMS ARE CAPABLE OF VERY HEAVY RAIN...AND MAY PRODUCE STRONG WINDS AND HAIL. SO STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST RADAR REPORTS AND FOR FURTHUR STATEMENTS
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1987Every severe thunderstorm warning in 1987
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.