Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 46, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 20, 1990, 4:15 PM EDT for Lycoming County, Pennsylvania. It was in force for 60 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
- Jul 20, 1990, 4:15 PM EDT (20:15 UTC)
- Expired
- Jul 20, 1990, 5:15 PM EDT
- In force
- 60 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Lycoming 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 |
|---|---|---|---|
| Jul 20, 4:35 PM EDT | Thunderstorm Wind 0 | Lycoming, 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, 8.3 hours before the alert went out and 222 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
- 34 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 1104 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KIPT 202015 SVRIPT PAC081-202115- BULLETIN-IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE WILLIAMSPORT PA 415 PM EDT FRI JULY 20 1990 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 515 PM EDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF NORTHCENTRAL PENNSYLVANIA...LYCOMING AT 415 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTHWEST OF WILLIAMSPORT. THE THUNDERSTORM WAS MOVING SOUTHEAST AT 35 MPH. THESE THUNDERSTORMS WILL LIKELY PRODUCE DAMAGING WINDS..HAIL..HEAVY RAIN AND DANGEROUS LIGHTNING. A SEVERE THUNDERSTORM PRODUCES WINDS IN EXCESS OF 58 MPH AND/OR HAIL 3/4 INCH OR LARGER IN DIAMETER. IF THREATENING WEATHER APPROACHES YOU SHOULD GO TO A SAFE PLACE IMMEDIATELY. TO REPORT SEVERE WEATHER CALL THE NEAREST LAW ENFORCEMENT AGENCY OR EMERGENCY MANAGEMENT OFFICE AND ASK THEM TO RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE. FJG/HM
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, Jul 20, 1:30 PM EDT, 2 hours 45 minutes before
PAZ007-008-014-201830 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 130 PM EDT FRI JUL 20 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHCENTRAL PENNSYLVANIA... THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR NORTH CENTRAL PENNSYLVANIA. THIS INCLUDES TIOGA...BRADFORD... CLINTON...LYCOMING AND SULLIVAN COUNTIES. THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS WILL EXIST UNTIL 800 PM EDT THIS FRIDAY EVENING. AT 1:20 PM A LINE OF SHOWERS AND THUNDEERSTORS WAS MOVING THROUGH MCKEAN COUNTY IN NORTHWEST PENNSYLVANIA. NO SEVERE WEATHER HAS BEEN REPORTED AS YET. PERSONS IN AND CLOSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE A#DVISED TO BE ALERT FOR THUNDEERSTORMS AND TAKE SHELTER IF THEY ARE OBSERVED. PG/HM
Special weather statement, Jul 20, 2:40 PM EDT, 1 hour 35 minutes before
PAZ007-008-014-2019400 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 240 PM EDT FRI JUL 20 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHCENTRAL PENNSYLVANIA... A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR NORTH CENTRAL PENNSYLVANIA. THIS INCLUDES TIOGA...BRADFORD...CLINTON...LYCOMING AND SULLIVAN COUNTIES. THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS WILL EXIST UNTIL 800 PM EDT THIS FRIDAY EVENING. AT 230 PM A LINE OF SHOWERS AND THUNDERSTORMS EXTENDED FROM NORTHWEST TIOGA COUNTY THROUGH SOUTHERN POTTER COUNTY AND NORTHWEST CLEARFIELD COUNTY. THE LINE THEN EXTENDED SOUTHWEST TO PITTSBURGH. NO SEVERE WEATHER HAS BEEN REPORTED AS YET IN THAT PORTION OF THE LINE CLOSEST TO NORTH CENTRAL PENNSYLVANIA. PERSONS IN AND CLOSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE ADVISED TO BE ALERT FOR THUNDERSTORMS AND TAKE SHELTER IF THEY ARE OBSERVED. PG/HM
Special weather statement, Jul 20, 4:11 PM EDT, 4 minutes before
PAZ006-008-009-013-202100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA 400 PM EST FRI JUL 20 1990 ...SHOWERS AND THUNDERSTORMS MOVING ACROSS CENTRAL PENNSYLVANIA... AT 355 PM EDT THE NATIONAL WEATHER SERVICE RADAR IN HARRISBURG WAS SHOWING A 30 MILE WIDE AREA OF SHOWERS AND THUNDERSTORMS WHICH EXTENDED FROM BINGHAMTON NEW YORK TO 25 MILES SOUTH OF PITTSBURGH. GUSTY WINDS...HEAVY DOWNPOURS...SMALL HAIL AND DEADLY LIGHTNING COULD ACCOMPANY THESE STORMS AS THEY MOVE ACROSS THE STATE. AT 355 PM THE STONGEST STORMS WERE IN EXTREME WEST CENTRE COUNTY...ABOUT 15 MILES WEST OF STATE COLLEGE...SOUTHERN CLEARFIELD COUNTY...ABOUT 15 MILES NORTH OF ALTOONA...AND IN WEST CAMBRIA COUNTY...ABOUT 15 MILES TO THE WEST OF ALTOONA. THE STORMS WERE MOVING TO THE EAST AT ABOUT 35 MILES AN HOUR AND AT THIS RATE THE STONGEST STORMS WILL BE MOVING IN TO SOUTHEAST CENTRE AND CENTRAL HUNTINGDON COUNTIES BY AROUND 500 PM. AND INTO THE WEST PORTION OF THE LOWER SUSQUEHANNA VALLEY BY 600 PM. IF THREATENING WEATHER APPROACHES...SEEK SHELTER IMMEDIATELY. WSO HAR RBH
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.