Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1987
Severe Thunderstorm Warning 2, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at May 23, 1987, 3:25 PM EDT for Juniata County, Snyder County, Pennsylvania. It was in force for 65 min. 2 reports 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 23, 1987, 3:25 PM EDT (19:25 UTC)
- Expired
- May 23, 1987, 4:30 PM EDT
- In force
- 65 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Juniata County, PA, Snyder 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 23, 3:45 PM EDT | Hail 0.75 | Snyder, PA | |
| May 23, 3:55 PM EDT | Thunderstorm Wind 0 | Juniata, 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 7.4 hours before the alert went out and 190 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
- 18 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 1054 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 31 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 KHAR 231927
SVRHAR
PAC043-109-067-232030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
325 PM EDT SAT MAY 23 1987
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING
EFFECTIVE UNTIL 430 PM EDT FOR THE FOLLOWING COUNTIES OF
SOUTH CENTRAL PENNSYLVANIA... EXTREME NORTHERN DAUPHIN
CENTRAL PENNSYLVANIA... EXTREME SOUTHERN SNYDER... EASTERN JUNIATA
HARRISBURG WEATHER RADAR SHOWS A SEVERE THUNDERSTORM ON THE SNYDER
AND JUNTAIA COUNTY LINE MOVING TO THE EASTSOUTHEAST ATABOUT 15 TO 20
MOH. THIS STORM IS PRODUCING LOCALLY HEAVY RAINS AND COULD ALSO BE
PRODUCING SOME HAIL AND GUSTY WINDS.
THIS IS A DANGEROUS STORM AND PEOPLE IN THE WARNED AREA SHOULD
PREPARE FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN
AND LIGHTNING. SHOULD THE STORM APPROACH YOU...SEEK IMMEDIATE
SHELTER. MOBILE TRAILERS ARE MOST VULNERABLE TO HIGH WINDS AND
SHOULD BE AVOIDED.
DSHWhat 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 23, 2:32 PM EDT, 53 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 225 PM EDT SAT MAY 23 1987 ...SEVERE THUNDERSTORM WATCH... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF PENNSYLVANIA. THE WATCH INCLUFOR PORTIONS OF PENNSYLVANIA. THE WATCH INCLUDES BRADFORD COUNTY IN NORTHCENTRAL PENNSYLVANIA. NORTHCENTRAL PENNSYLVANIA. THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING WINDS WILL EXIST UNTIL 900 PM THIS SATURDAY EVENING. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. PMG
Special weather statement, May 23, 2:56 PM EDT, 29 minutes before
SPECIAL WEATHER STATEMENT...CORRECTION... NATIONAL WEATHER SERVICE WILLIAMSPORT PA 225 PM EDT SAT MAY 23 1987 ...SEVERE THUNDERSTORM WATCH... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF PENNSYLVANIA. THE WATCH INCLUDES BRADFORD COUNTY IN NORTHCENTRAL PENNSYLVANIA. THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING WINDS WILL EXIST UNTIL 900 PM THIS SATURDAY EVENING. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. PMG
Special weather statement, May 23, 3:00 PM EDT, 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 300 PM EDT SAT MAY 23 1987 SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR ADAMS COUNTY UNTIL 330 PM EDT. HAM OPERATOR IN THE LITTLETOWN AREA REPORT GOLF BALL SIZE HAIL AT 240 PM EDT IN THE LITTLESTOWN NEAR THE MARYLAND BORDER. THE HARRISBURG WEATHER RADAR CONTINUES TO SHOW THUNDERSTORM ACTIVITY INCREASING OVER THE SUSQUEHANNA VALLEY AND THE CENTRAL MOUNTAINS. THE HEAVIEST STORMS WERE SOUTHERN LYCOMING ALONG THE UNION AND NORTHUMBERLAND BORDER ALSO IN SNYDER COUNTY. OTHERS THAT ARE INCREASING ARE IN HUNTINGDON AND FULTON COUNTIES. ALL THESE STORMS AND OTHER THAT COULD OCCUR IN THE VALLEY OVER THE NEXT SEVERAL HOURS COULD PRODUCE LOCALLY HEAVY RAINS AND HAIL. OFFICAL SKYWARN PEOPLE ARE REQUESTED TO CALL IN ANY SEVERE WEATHER TO THE NATIONAL WEATHER SEVICE. WSO HAR HURLEY
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 2:35 PM EDT | Severe Thunderstorm Warning | CTP | Adams | 65 min |
| May 23, 3:25 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 65 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.