Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 65, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 14, 1990, 11:16 PM EDT for Mifflin County, Pennsylvania. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Sep 14, 1990, 11:16 PM EDT (03:16 UTC)
- Expired
- Sep 15, 1990, 12:00 AM EDT
- In force
- 44 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Mifflin County, PA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 00:00Z, 3.3 hours before the alert went out and 186 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
- 222 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 672 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KHAR 150317
SVRHAR
PAC087-150400-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE HARRISBURG PA
1116 PM EDT FRI SEP 14 1990
THE NATIONAL WEATHER SERVICE IN HARRISBURG HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL MIDNIGHT EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN CENTRAL PENNSYLVANIA
...MIFFLIN
AT 1115 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS
SHOWING SEVERE THUNDERSTORMS MOVING INTO WESTERN MIFFLIN COUNTY. THIS
STORM HAS ALREADY KNOCKED DOWN NUMEROUS TREES AS IT WENT THROUGH STATE
COLLEGE. THE STORM ALSO PRODUCED 1/2 INCH OF RAIN IN 15 MINUTES AS IN
WENT THROUGH STATE COLLEGE. THIS CAUSED SOME MINOR STREET FMLOODING.
IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE
PLACE IMMEDIATELY AND ASK THE NEAREST LAW ENFORCEMENT AGENCY
TO RELAY YOUR SEVERE WEATHER REPORTS TO THE LOCAL NATIONAL
WEATHER SERVICE OFFICE.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, Sep 14, 8:50 PM EDT, 2 hours 26 minutes before
PAZ007-008-014-150200 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 850 PM EDT FRI SEP 14 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL MIDNIGHT EDT FOR NORTHCENTRAL PENNSYLVBANIA... A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR ALL OF NORTHCENTRAL PENNSYLVANIA EFFECTIVE UNTIL MIDNIGHT EDT INCLUDING THE COUNTIES OF BRADFORD...CLINTON...LYCOMING...SULLIVAN AND TIOGA. AT 840 PM EDT RADAR SHOWED SCATTERED THUNDERSTORMS MOVING THROUGH THE NORTHERN MOUNTAINS OF PENNSYLVANIA. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 35 MPH. THE LEADING EDGE OF THE THUNDERSTORM AREA SHOULD REACH WESTERN CLINTON COUNTY BY 915 PM AND WESTERN TIOGA COUNTY BY 930 PM EDT. REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT 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 LISTE4N FOR LATER STATEMENTS AND POSSIBLE WARNINGS. HM
Special weather statement, Sep 14, 8:58 PM EDT, 2 hours 18 minutes before
PAZ007-008-014-150200 SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE WILLIAMSPORT PA 850 PM EDT FRI SEP 14 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL MIDNIGHT EDT FOR NORTHCENTRAL PENNSYLVANIA... A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR ALL OF NORTHCENTRAL PENNSYLVANIA EFFECTIVE UNTIL MIDNIGHT EDT INCLUDING THE COUNTIES OF BRADFORD...CLINTON...LYCOMING...SULLIVAN AND TIOGA. AT 840 PM EDT RADAR SHOWED SCATTERED THUNDERSTORMS MOVING THROUGH THE NORTHERN MOUNTAINS OF PENNSYLVANIA. THESE THUNDERSTORMS WERE MOVING SOUTHEAST AT 35 MPH. THE LEADING EDGE OF THE THUNDERSTORM AREA SHOULD REACH WESTERN CLINTON COUNTY BY 915 PM AND WESTERN TIOGA COUNTY BY 930 PM EDT. REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT 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. HM/JSN CORRECTION FOR TYPO
Special weather statement, Sep 14, 9:30 PM EDT, 1 hour 46 minutes before
PAZ007-008-014-150330 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 1030 PM EDT FRI SEP 14 1990 ...SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL MIDNIGHT EDT FOR NORTHCENTRAL PENNSYLVANIA... A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL MIDNIGHT EDT INCLUDING THE COUNTIES OF BRADFORD...CLINTON...LYCOMING...SULLIVAN AND TIOGA. AT 1030 PM EDT RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS...DECREASING IN INTENSITY. THE LEADING EDGE OF THE SHOWERS AND THUNDERSTORMS STRETCHED FROM ELKLAND IN TIOGA COUNTY SOUTH ACROSS WESTERN LYCOMING AND EASTERN CLINTON COUNTIES. THE STRONGEST THUNDERSTORMS WERE STRETCHING FROM NEAR PHILIPSBURG AND STATE COLLEGE THEN SOUTHWEST TO JOHNSTOWN. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MPH AND SHOULD CONTINUE TO DECREASE IN INTENSITY. THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS CLINTON...TIOGA AND LYCOMING COUNTIES. THESE STORMS WILL PRODUCE GUSTY WINDS AND BRIEFLY HEAVY DOWNPOURS OF RAIN. NO SEVERE WEATHER HAS BEEN REPORTED WITH THE THUNDERSTORMS IN NORTHCENTRAL PENNSYLVANIA. HOWEVER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO T%HE WATCH AREA. PERSONS IN NORTHCENTRAL PENNSYLVANIA SHOULD REMAIN ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. HM/JSN
Special weather statement, Sep 14, 9:35 PM EDT, 1 hour 41 minutes before
PAZ007-008-014-150235 SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE WILLIAMSPORT PA 935 PM EDT FRI SEP 14 1990 ...SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL MIDNIGHT EDT FOR NORTHCENTRAL PENNSYLVANIA... A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL MIDNIGHT EDT INCLUDING THE COUNTIES OF BRADFORD...CLINTON...LYCOMING...SULLIVAN AND TIOGA. AT 935 PM EDT RADAR SHOWED A LINE OF THUNDERSTORMS STRETCHING FROM NEAR BRADFORD IN MCKEAN COUNTY SOUTH TO INDIANA AND LATROBE. OTHER CLUSTERS OF THUNDERSTORMS WERE IN ADVANCE OF THIS LINE OVER POTTER COUNTY AND STRETCHING FROM WESTERN CLINTON COUNTY SOUTH INTO CENTRE COUNTY. AT 935 PM EDT THE STRONGEST THUNDERSTORMS WERE OVER THE LAUREL MOUNTAINS OF SOUTHWEST PENNSYLVANIA. THE THUNDERSTORMS WERE MOVING SOUTHEAST AT 35 MPH. THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS CLINTON AND TIOGA COUNTIES AND SHOULD REACH WESTERN LYCOMING COUNTY BY 1015 PM EDT. REMEMBER THAT A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN NORTHCENTRAL PENNSYLVANIA SHOULD REMAIN ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. HM/JSN
Special weather statement, Sep 14, 10:30 PM EDT, 46 minutes before
PAZ007-008-014-150330 SPECIAL WEATHER STATEMENT...CORRECTION NATIONAL WEATHER SERVICE WILLIAMSPORT PA 1030 PM EDT FRI SEP 14 1990 ...SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL MIDNIGHT EDT FOR NORTHCENTRAL PENNSYLVANIA... A SEVERE THUNDERSTORM WATCH CONTINUES IN EFFECT UNTIL MIDNIGHT EDT INCLUDING THE COUNTIES OF BRADFORD...CLINTON...LYCOMING...SULLIVAN AND TIOGA. AT 1030 PM EDT RADAR SHOWED AN AREA OF SHOWERS AND THUNDERSTORMS...DECREASING IN INTENSITY. THE LEADING EDGE OF THE SHOWERS AND THUNDERSTORMS STRETCHED FROM ELKLAND IN TIOGA COUNTY SOUTH ACROSS WESTERN LYCOMING AND EASTERN CLINTON COUNTIES. THE STRONGEST THUNDERSTORMS WERE STRETCHING FROM NEAR PHILIPSBURG AND STATE COLLEGE THEN SOUTHWEST TO JOHNSTOWN. THE SHOWERS AND THUNDERSTORMS WERE MOVING EAST AT 30 MPH AND SHOULD CONTINUE TO DECREASE IN INTENSITY. THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS CLINTON...TIOGA AND LYCOMING COUNTIES. THESE STORMS WILL PRODUCE GUSTY WINDS AND BRIEFLY HEAVY DOWNPOURS OF RAIN. NO SEVERE WEATHER HAS BEEN REPORTED WITH THE THUNDERSTORMS IN NORTHCENTRAL PENNSYLVANIA. HOWEVER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS I)N AND CLOSE TO THE WATCH AREA. PERSONS IN NORTHCENTRAL PENNSYLVANIA SHOULD REMAIN ALERT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. HM/JSN CORRECTION FOR TIME IN HEADER
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 10:54 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 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; the sounding from the Mesonet's radiosonde archive.