Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 4, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at May 28, 1987, 6:25 PM EDT for Sullivan County, Pennsylvania. It was in force for 35 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 28, 1987, 6:25 PM EDT (22:25 UTC)
- Expired
- May 28, 1987, 7:00 PM EDT
- In force
- 35 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Sullivan 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 28, 6:28 PM EDT | Thunderstorm Wind 0 | Sullivan, 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, 10.4 hours before the alert went out and 244 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
- 599 J/kg
- Mixed-layer CIN
- -72 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 159 m²/s²
- 0-3 km storm-relative helicity
- 161 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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, May 28, 3:35 PM EDT, 2 hours 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
330 PM EDT THU MAY 28 1987
...STRONG THUNDERSTORM IN NORTHERN LYCOMING COUNTY...
AT 315 PM EDT NATIONAL WEATHER SERVICE RADAR SHOWED A STRONG
THUNDERSTORM 17 MILES NORTH NORTHWEST OF WILLIAMSPORT PENNSYLVANIA.
THIS STORM WAS MOVING TO THE SOUTHEAST AT A SPEED OF 30 MPH. IT
WILL AFFECT LYCOMING COUNTY IN NORTHCENTRAL PENNSYLVANIA UNTIL 415
PM THIS AFTERNOON.
THIS STORM CAN CAUSE HEAVY DOWNPOURS ALONG WITH GUSTY WINDS AND
DANGEROUS LIGHTNING.
WTBSpecial weather statement, May 28, 4:20 PM EDT, 2 hours 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
420 PM EDT THU MAY 28 1987
...STRONG THUNDERSTORMS IN EASTERN BRADFORD AND NORTHERN SULLIVAN
COUNTIES...
AT 415 PM EDT NATIONAL WEATHER SERVICE RADAR WAS DEPICTING STRONG
THUNDERSTORM CELLS IN EASTERN BRADFORD AND NORTHERN SULLIVAN COUNTIES.
THESE STORMS WERE MOVING TO THE SOUTHEAST AT A SPEED OF 25 TO 30 MILES
PER HOUR.
THESE STORMS CAN CAUSE HEAVY DOWNPOURS ALONG WITH GUSTY WINDS AND
DANGEROUS LIGHTNING. PERSONS IN OR NEAR THE AREA SHOULD REMAIN ALERT
TO LOCAL WEATHER CONDITIONS AND SEEK SHELTER IF NECESSARY.
MRSSpecial weather statement, May 28, 6:10 PM EDT, 15 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
610 PM EDT THU MAY 28 1987
...STRONG THUNDERSTORM IN SULLIVAN COUNTY...
AT 600 PM EDT NATIONAL WEATHER SERVICE RADAR WAS DEPICTING A STRONG
THUNDERSTORM IN SULLIVAN COUNTY NEAR LAPORTE. THIS STORM WAS MOVING TO
THE SOUTHEAST AT A SPEED OF 25 TO 30 MILES PER HOUR. THERE HAVE BEEN
REPORTS OF HEAVY RAIN AND PEA-SIZE HAIL IN THIS THUNDERSTORM.
THIS STORM CAN CAUSE HEAVY DOWNPOURS ALONG WITH GUSTY WINDS AND
DANGEROUS LIGHTNING. PERSONS IN OR NEAR THE AREA SHOULD REMAIN ALERT
TO LOCAL WEATHER CONDITIONS AND SEEK SHELTER IF NECESSARY.
MRSNearby
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.