Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 26, NWS Cleveland, OH
NWS Cleveland, OH issued this severe thunderstorm warning at May 30, 1987, 6:25 PM EDT for Potter County, Pennsylvania. It was in force for 65 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
- May 30, 1987, 6:25 PM EDT (22:25 UTC)
- Expired
- May 30, 1987, 7:30 PM EDT
- In force
- 65 min
- Issued by
- NWS Cleveland, OH
- Area
- Whole counties
County Potter County, PA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 30, 6:45 PM EDT | Hail 0.75 | Potter, 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
Pittsburgh, PA (KPIT), launched 12:00Z, 10.4 hours before the alert went out and 237 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
- 1755 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1131 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- -18 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 KERI 302225 SVRERI PAC105-302330- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ERIE PA 625 PM EDT SAT MAY 30 1987 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 730 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTY OF NORTHWEST PENNSYLVANIA...POTTER AT 620 PM RADAR SHOWED A SEVERE THUNDERSTORM LOCATED NEAR SHINGLEHOUSE IN NORTHWEST POTTER COUNTY MOVING TOWARDS THE EAST AT 20 MILES AN HOUR. THIS STORM WILL CAUSE VERY HEAVY DOWNPOURS WITH FLOODING OF SMALL STREAMS ROADWAYS AND LOW LYING AREAS ALONG WITH STRONG GUSTY WINDS...DANGEROUS LIGHTNING AND LARGE 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, May 30, 1:26 PM EDT, 4 hours 59 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 120 PM EDT SAT MAY 30 1987 VERY HEAVY THUNDERSTORMS WERE DEVELOPING OVER LAKESHORE COUNTIES. AT 120 THIS AFTERNOON WEATHER RADAR SHOWED THUNDERSTORMS WITH VERY HEAVY RAINS IN EASTERN LAKE... NORTHEAST GEAUGA COUNTIES. THEY WERE MOVING NORTHEAST INTO ASHTABULA COUNTY. A THUNDERSTORM WITH HEAVY RAIN WAS ALONG ROUTE 224 BETWEEN GREENWHICH AND LODI IN NORTHERN ASHLAND COUNTY. A THUNDERSTORM WITH VERY HEAVY RAIN WAS SOUTH OF LAKESHORE AREA IT WAS NORTHWEST OF MANSFIELD NEAR THE CITY OF SHELBY IN NORTHWEST RICHLAND COUNTY. THE STORMS WERE MOVING NORTHEAST AROUND 15 MILES AN HOUR. THEY WILL CONTINUE TO DEVELOP OVER THE LAKESHORE AREA THROUGH THE AFTERNOON. THEY CAN PRODUCE VERY HEAVY RAINS... HAIL.. AND GUSTY WINDS. THOMPSON
Special weather statement, May 30, 3:45 PM EDT, 2 hours 40 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 345 PM EDT SAT MAY 20 1987 SEVERE THUNDERSTORM WATCHES REMAIN IN EFFECT FOR ALL OF OHIO EXCEPT THE NORTHWEST COUNTIES UNTIL 8 PM EDT. AT 320 PM EDT WEATHER SERVICE RADAR SHOWED A LINE OF THUNDERSTORMS FROM THE NORTHEAST CORNER OF OHIO TO CLEVELAND... AND THEN TO COLUMBUS. A RELATIVELY LARGE AREA OF THUNDERSTORMS COVERED MOST OF THE STATE SOUTH AND WEST OF COLUMBUS. MOST OF THE THUNDERSTORMS WERE MOVING NORTHEAST AT ABOUT 20 MPH. THE THUNDERSTORMS THAT DEVELOPED IN OHIO THIS AFTERNOON ARE CAPABLE OF PRODUCING BOTH LARGE HAIL AND DAMAGING WINDS. HAILSTONES 3/4 INCH IN DIAMETER FELL ON ASHTABULA COUNTY BETWEEN 215 PM AND 230 PM. THE WEATHER SERVICE RECEIVED AN UNCOMFIRMED REPORT OF WIND DAMAGE FROM THE GEAUGA COUNTY COMMMUNITY OF THOMPSON AT 305 PM. BESIDES HAIL AND HIGH WINDS... OHIOANS COULD ALSO EXPERIENCE HEAVY DOWNPOORS FROM THE THUNDERSTORMS MOVING ACROSS THE STAjTE. RESIDENTS OF THE BUCKEYE STATE SHOULD REMAIN ALERT FOR THREATENING WEATHER AND LISTEN FOR LATEST STATEMENTS FROM THE WEATHER SERVICE. KWIATKOWSKI
Special weather statement, May 30, 5:49 PM EDT, 36 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CLEVELAND OH 549 PM EDT SAT MAY 30 1987 WARNINGS FOR LORAIN AND CUYAHOGA COUNTIES HAVE EXPIRED. IN LORAIN COUNTY...THERE WERE SEVERAL REPORTS OF 50 TO 60 MPH WINDS... HALF TO THREE QUARTER INCH HAIL... AND TORRENTIAL RAINS BETWEEN 420 AND 515 PM. NO SEVERE WEATHER WAS REPORTED IN CUYAHOGA COUNTY BETWEEN 430 AND 545PM. AT 545PM... RADAR WAS SHOWING AN EXTENSIVE AREA OF SHOWERS AND THUNDERSTORMS FROM THE LAKESHORE OF LORAIN COUNTY WEST ACROSS ERIE COUNTY THEN SOUTHWEST TO FINDLAY AREA OF NORTHWEST OHIO. STORMS WERE DRIFTING EAST NORTHEAST AT 15 TO 20 MPH. MANY OF THE STORMS BETWEEN CLEVELAND AND TOLEDO WILL PRODUCE TORRENTIAL RAINS FOR AN HOURS TIME CAUSING LOCALIZED STREET FLOODING... GUSTY WINDS TO 40 MPH AND SOME SMALL HAIL THIS EVENING. THE SEVERE THUNDERSTORM WATCH FOR VIRTUALLY ALL OF OHIO WILL CONTINUE IN EFFECT TIL 8PM. DRAG
The office that day
Everything else NWS Cleveland, OH issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 30, 1:38 PM EDT | Severe Thunderstorm Warning | CLE | Crawford | 67 min |
| May 30, 1:52 PM EDT | Severe Thunderstorm Warning | CLE | Erie | 68 min |
| May 30, 2:50 PM EDT | Severe Thunderstorm Warning | CLE | Crawford, Erie | 60 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.