Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 17, NWS State College, PA

June 18, 1990Pike County, Pennsylvania

NWS State College, PA issued this severe thunderstorm warning at Jun 18, 1990, 3:44 PM EDT for Pike County, Pennsylvania. It was in force for 76 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
Jun 18, 1990, 3:44 PM EDT (19:44 UTC)
Expired
Jun 18, 1990, 5:00 PM EDT
In force
76 min
Issued by
NWS State College, PA
Area
Whole counties

County Pike 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

TimeReportWhereRemark
Jun 18, 4:00 PM EDTHail 0.75Pike, 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

Albany, NY (KALB), launched 12:00Z, 7.7 hours before the alert went out and 181 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.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 12:00Z on 1990-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 1990-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 173 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
18 J/kg
Mixed-layer CIN
-301 J/kg
Mixed-layer LCL
824 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
173 m²/s²
0-3 km storm-relative helicity
202 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

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, 1:07 PM EDT, 2 hours 37 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 59 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 44 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, 55 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, 54 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
Special weather statement, Jun 18, 3:35 PM EDT, 9 minutes before
PAZ-006-008-009-013-014-
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HARRISBURG PA.
325 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 320 PM RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS THAT REACHED
FROM THE NORTH CENTRAL MOUNTAINS...EAST THROUGH THE MIDDLE SUSQUEHANNA
VALLEY INTO NORTHEAST PENNSYLVANIA. A SMALL CLUSTER OF THUNDERSTORMS
WERE ALSO IN FRANKLIN AND ADAMS COUNTIES OF THE SOUTH CENTRAL MOUNTAINS.
THE STORMS WITH THE HEAVIEST RAIN WERE NOTED FROM CENTRE COUNTY...
EAST INTO UNION AND SNYDER COUNTIES...SOON TO MOVE INTO MONTOUR AND
NORTHUMBERLAND.
PERSONS THORUGHOUT THE TORNADO WATCH AREA SHOULD BE ALERT FOR THREATENING
WEATHER CONDITIONS AND GO TO A SAFE PLCAE IF NECESSARY.
NOTE TO ALL SKYWARN OBSERVERS...THE NET IS IN OPERATIONS.

WSO HAR JORDAN

The office that day

Everything else NWS State College, PA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 11:00 AM EDTSevere Thunderstorm WarningCTPTioga30 min
Jun 18, 11:25 AM EDTSevere Thunderstorm WarningCTPBradford60 min
Jun 18, 11:30 AM EDTSevere Thunderstorm WarningCTPTioga60 min
Jun 18, 3:33 PM EDTSevere Thunderstorm WarningCTPAdams57 min
Jun 18, 3:44 PM EDTSevere Thunderstorm WarningCTPMonroe, Northampton76 min
Jun 18, 3:53 PM EDTSevere Thunderstorm WarningCTPNorthumberland67 min
Jun 18, 4:24 PM EDTSevere Thunderstorm WarningCTPCarbon53 min
Jun 18, 4:24 PM EDTSevere Thunderstorm WarningCTPLehigh, Northampton51 min
Jun 18, 4:24 PM EDTSevere Thunderstorm WarningCTPSchuylkill51 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.