Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 15, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jun 18, 1990, 3:33 PM EDT for Adams County, Pennsylvania. It was in force for 57 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
- Jun 18, 1990, 3:33 PM EDT (19:33 UTC)
- Expired
- Jun 18, 1990, 4:30 PM EDT
- In force
- 57 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Adams 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 |
|---|---|---|---|
| Jun 18, 3:45 PM EDT | Thunderstorm Wind 63 | Adams, PA | |
| Jun 18, 4:20 PM EDT | Thunderstorm Wind 0 | Adams, 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, 7.6 hours before the alert went out and 104 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 962 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 67 m²/s²
- 0-3 km storm-relative helicity
- 56 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, Jun 18, 10:38 AM EDT, 4 hours 55 minutes before
PAZ007-008-014-181600-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE WILLIAMSPORT PA
1030 AM EDT JUN MON 18 1990
...SEVERE THUNDERSTORM WATCH ISSUED FOR PART OF NORTHCENTRAL
PENNSYLVANIA UNTIL 200 PM THIS MONDAY AFTERNOON...
...THUNDERSTORMS MOVING THROUGH NORTHERN CLINTON AND TIOGA
COUNTIES...
AT 1025 AM EDT NATIONAL WEATHER SERVICE RADAR SHOWED AN AREA OF
SHOWERS AND THUNDERSTORMS EXTENDING FROM CENTRAL NEW YORK
INTO CENTRAL PENNSYLVANIA. IN NORTHCENTRAL PENNSYLVANIA...THE
HEAVIEST THUNDERSTORMS WERE LOCATED IN NORTHERN CLINTON AND
WESTERN TIOGA COUNTY. THE THUNDERSTORMS WERE MOVING EAST AT 40 TO 45
MILES AN HOUR.
THESE THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS NORTHCENTRAL
PENNSYLVANIA THE REST OF THIS MORNING AND EARLY THIS AFTERNOON.
A SEVERE THUNDERSTORM WATCH MEANS THAT SEVERE THUNDERSTORMS ARE
POSSIBLE. SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58
MPH...LARGE HAIL...DANGEROUS LIGHTNING AND HEAVY DOWNPOURS.
IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE
IMMEDIATELY.
HM
CORRECT HEADLINESpecial weather statement, Jun 18, 1:07 PM EDT, 2 hours 26 minutes before
PAZ007-008-014-181730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 107 PM EDT MON JUN 18 1990 ...SEVERE THUNDERSTORM WATCH FOR PARTS OF NORTHCENTRAL PENNSYLVANIA HAS BEEN CANCELLED... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT UNTIL 200 PM EDT FOR PARTS OF NORTHCENTRAL PENNSYLVANIA HAS BEEN CANCELLED. AT 105 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED THUNDERSTORMS WITH HEAVY RAIN CONTINUING OVER NORTHCENTRAL PENNSYLVANIA. THE THUNDERSTORMS WITH THE HEAVIEST RAINS WERE OVER NORTHCENTRAL SULLIVAN COUNTY AND OVER SOUTHWEST LYCOMING COUNTY NEAR OVAL. THESE THUNDERSTORMS WERE MOVING EAST AT 45 MPH. EVEN THOUGH THE SEVERE THUNDERSTORM WATCH HAS BEEN CANCELLED...PERSONS IN NORTHCENTRAL PENNSYLVANIA SHOULD REMAIN ALERT AS THESE THUNDERSTORMS MOVE THROUGH. REMEMBER...ANY THUNDERSTORM CAN PRODUCE DANGEROUS LIGHTNING, HAIL, AND HEAVY RAINS. JSN
Special weather statement, Jun 18, 1:45 PM EDT, 1 hour 48 minutes before
PAZ-006-009-013-014- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 140 PM EDT MON JUN 18 1990 ...THUNDERSTORMS WITH HEAVY DOWNPOURS..GUSTY WINDS AND POSSIBLE HAIL MOVING THROUGH THE CENTRAL MOUNTAINS AND THE UPPER PORTIONS OF THE MIDDLE SUSQEUHANNA VALLEY... AT 130 PM RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS IN IN THE CENTRAL MOUTAINS AROUND DUBOIS EAST TO THE WILKES-BARRE SCRANTON AREA. THE HEAVIEST STORMS WERE IN CLEARFIELD, NORTHERN CENTRE, CLINTON, SOUTHERN LYCOMING COUNTIES. THE STORMS COULD BE PRODUCING HEAVY RAINS, GUSTY WINDS AND HAIL. PERSON IN THESE COUNTES AND IN THE REMAINING AREAS OF THE CENTRAL MOUNTIANS AND THE MIDDLE SUSQUEHANNA VALLEY SHOULD BE ON THE LOOKOUT FOR THESE STORMS AND TAKE NESSARY ACTION IF THEY THREATEN YOUR LOCATION. THE SHOWERS AND STORMS WERE MOVING TO THE EAST ATBOUT 40 TO 45 MPH. WSO HAR HURLEY
Special weather statement, Jun 18, 2:00 PM EDT, 1 hour 33 minutes before
PAZ007-008-014-181830- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 200 PM EDT MON JUN 18 1990 ...THUNDERSTORMS WITH HEAVY RAIN AND SMALL HAIL IN PARTS OF NORTHCENTRAL PENNSYLVANIA... AT 200 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A LARGE AREA OF THUNDERSTORMS WITH HEAVY RAIN AND SMALL HAIL CONTINUING OVER NORTHCENTRAL PENNSYLVANIA. THE THUNDERSTORMS WERE IN A LINE FROM CLEARFIELD TO NEAR THE WILKES-BARRE SCANTON AREA. THE THUNDERSTORMS WITH THE HEAVIEST RAINS WERE OVER SOUTHERN CLINTON COUNTY SOUTH OF LOCKHAVEN AND AROUND ROSECRANS. OTHER THUNDERSTORMS WITH HEAVY RAIN AND POSSIBLE SMALL HAIL WERE MOVING OUT OF SOUTHEAST LYCOMING COUNTY INTO NORTHERN NORTHUMBERLAND COUNTY. THE INDIVIUAL THUNDERSTROMS WERE MOVING EAST AT 45 MPH. WHILE THE LINE OF THUNDERSTORMS WAS MOVING SLOWLY SOUTH. THESE THUNDERSTORMS PRODUCED 1/2 TO OVER AN INCH OF RAIN AS THEY PASSED ACROSS LYCOMING COUNTY BETWEEN 100 AND 200 PM EDT. SMALL HAIL BETWEEN 1/4 AND 1/2 INCHES WAS ALSO REPORTED IN THE GARDENVIEW AREA OF WILLIAMSPORT. PERSONS IN SOUTHERN CLINTON AND LYCOMING COUNTIES OF NORTHCENTRAL PENNSYLVANIA SHOULD REMAIN ALERT AS THESE THUNDERSTORMS MOVE THROUGH. ACT QUCIKLY IF OBSERVE A THUNDERSTORM APPROACHING. STAY INSIDE AWAY FROM WINDOWS AND WAIT UNTIL THE STORM HAS PASSED. JSN
Special weather statement, Jun 18, 2:49 PM EDT, 44 minutes before
PAZ-006-009-013-014- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 245 PM EDT MON JUN 18 1990 ...TORNADO WATCH UNTIL 9 PM EDT FOR MOST ALL THE MIDDLE SUSQEUAHNNA VALLEY AND ALL THE LOWER SUSQUEHANNA VALLEY... AT 240 PM RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS IN THE MIDDLE SUSQUEHANNA VALLEY, IN THE WESTERN LOWER SUSQUEHANNA VALLEY AND IN NORTHWESTERN VIGINIA. HEAVEST THUNDERSTORMS AREA IN SOUTHERN CLINTON, UNION, MOUNTOUR, FRANKLIN COUNTIES OF PA. HAM RADIO SKYWARN WATCHERS IN NORTHUMBERLAND COUNYT REPORTED HEAVY RAINS DIME SIZE HAIL AND STRONG WINDS. PERSONS WITHIN THE VALLEY SHOULD BE ON THE LOOKOUT FOR THESE STORMS FOR THE REST OF THE AFTERNOON AND EgVENING HOURS AND TAKE NESSARY ACTION IS CONDTIONS THREATEN. THE SHOWERS AND STORMS WERE MOVING TO THE EAST ATABOUT 40 TO 45 MPH. WSO HAR HURLEY
Special weather statement, Jun 18, 2:50 PM EDT, 43 minutes before
PAZ007-008-014-181930- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 250 PM EDT MON JUN 18 1990 ...TORNADO WATCH IN EFFECT UNTIL 900 PM EDT FOR CLINTON COUNTY AND MOST OF CENTRAL PENNSYLVAINA... ...LINE OF THUNDERSTORMS WITH HEAVY RAIN AND SMALL HAIL IN PARTS OF NORTHCENTRAL PENNSYLVANIA... AT 250 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF INTENSE THUNDERSTORMS WITH HEAVY RAIN AND SMALL HAIL CONTINUING OVER PARTS OF NORTHCENTRAL AND CENTRAL PENNSYLVANIA. THE THUNDERSTORMS WERE IN A LINE FROM SAYERS DAM IN CENTRE COUNTY TO NEAR HAZELTON IN LUZERNE COUNTY. IN NORTHCENTRAL PENNSYLVANIA...THE THUNDERSTORMS WITH THE HEAVIEST RAINS WERE OVER SOUTHERN CLINTON COUNTY SOUTH OF LOCKHAVEN AND AROUND ROSECRANS. OTHER THUNDERSTORMS WITH HEAVY RAIN AND POSSIBLE SMALL HAIL WERE INDICATED IN PARTS OF CENTRAL PENNSYLVANIA. THE INDIVIUAL THUNDERSTROMS WERE MOVING EAST AT 45 MPH. WHILE THE LINE OF THUNDERSTORMS WAS SAGGING SLOWLY SOUTH. AS MUCH AS 1.9 INCHES OF RAIN HAS BEEN REPORTED IN HALF AN HOUR WITH THESE THUNDERSTORMS ALONG WITH SMALL HAIL. PERSONS IN SOUTHERN CLINTON COUNTY OF NORTHCENTRAL PENNSYLVANIA SHOULD REMAIN ALERT AS THESE THUNDERSjTORMS MOVE THROUGH. ACT QUICKLY IF YOU OBSERVE A THUNDERSTORM APPROACHING. STAY INSIDE AWAY FROM WINDOWS AND WAIT UNTIL THE STORM HAS PASSED. JSN
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 11:00 AM EDT | Severe Thunderstorm Warning | CTP | Tioga | 30 min |
| Jun 18, 11:25 AM EDT | Severe Thunderstorm Warning | CTP | Bradford | 60 min |
| Jun 18, 11:30 AM EDT | Severe Thunderstorm Warning | CTP | Tioga | 60 min |
| Jun 18, 3:44 PM EDT | Severe Thunderstorm Warning | CTP | Monroe, Northampton | 76 min |
| Jun 18, 3:44 PM EDT | Severe Thunderstorm Warning | CTP | Pike | 76 min |
| Jun 18, 3:53 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland | 67 min |
| Jun 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Carbon | 53 min |
| Jun 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Lehigh, Northampton | 51 min |
| Jun 18, 4:24 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 51 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1990Every severe thunderstorm warning in 1990
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.