Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 44, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 9, 1990, 4:07 PM EDT for Northampton County, Pennsylvania. It was in force for 38 min.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1990, 4:07 PM EDT (20:07 UTC)
- Expired
- Jul 9, 1990, 4:45 PM EDT
- In force
- 38 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
County Northampton 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
Atlantic City In, NJ (KACY), launched 12:00Z, 8.1 hours before the alert went out and 160 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
- 684 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 614 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KABE 092007
SVRABE
PAC095-092045-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ALLENTOWN PA
407 PM EDT MON JUL 9 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 445 PM EDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE EAST CENTRAL PART OF PENNSYLVANIA
EASTERN NORTHAMPTON
AT 400PM EDT RADAR INDICATED A SEVERE THUNDERSTORM BETWEEN NAZARETH
AND EASTON IN NORTHAMPTON COUNTY. THIS THUNDERSTORM IS MOVING EAST
SOUTHEAST AT 30 MPH.
AT 355PM 3/4 INCH HAIL WAS REPORTED BY EMERGENCY MANAGMENT. A
WEATHER SPOTTER IN NAZARETH REPORTED NUMEROUS TREES DOWN.
THIS IS A DANGEROUS STORM AND PEOPLE IN THE WARNED AREA SHOULD BE
PREPARED FOR STRONG DAMAGING WINDS...LARGE HAIL...VERY HEAVY RAIN
AND LIGHTNING. SHOULD THE STORM APPROACH YOU...SEEK IMMEDIATE
SHELTER. MOBILE HOMES ARE MOST VULNERABLE TO HIGH WINDS AND
SHOULD BE AVOIDED.
A SEVERE THUNDERSTORM WATCH CONTINUES FOR ALL OF EASTERN
PENNSYLVANIA UNTIL 9PM EDT THIS MONDAY EVENING.
SEVERE THUNDERSTORM WARNING ISSUED AT 326PM EDT REMAINS IN EFFECT
FOR NORTHCENTRAL NORTHAMPTON COUNTY UNTIL 430 PM EDT.
HEAVY RAINS WITH THIS THUNDERSTORM MAY CAUSE FLOODING OF SMALL
STREAMS AND UNDERPASSES.
LOEPERWhat 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 9, 12:18 PM EDT, 3 hours 49 minutes before
PAZ008-009-013-014-091620- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 1215 PM EDT MON JUL 9 1990 ...POSSIBLE THUNDERSTORMS ENTERING THE LOWER SUSQUEHANNA VALLEY... AT 1130 AM WEATHER SERVICE RADAR IN HARRISBURG INDICATED SCATTERED RAINSHOWERS WITH EMBEDDED THUNDERSTORMS...SOME HEAVY... OVER NORTHWESTERN PENNSYLVANIA AND THE NORTHERN MOUNTAINS. THESE THUNDERSTORMS ARE SLOWLY MOVING EAST SOUTHEAST AT 25 MILES AN HOUR AND WILL GRADUALLY CHANGE TO SOUTHEAST THIS AFTERNOON.... ALLOWING THEM TO ENTER INTO THE LOWER SUSQUEHANNA VALLEY JUST AFTER 200 PM EDT. RAINFALL OF 1.50 INCHES HAS BEEN REPORTED OVER TIONESTA SINCE 1000 AM. IN ADDITION...VERY HEAVY RAINS WERE REPORTED IN MEADVILLE. REMEMBER...IF THREATENING WEATHER APPROACHES...SEEK SHELTER IMMEDIATELY. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL TELEVISION OR RADIO STATION FOR ANY FURTHER UPDATES ON THIS WEATHER SITUATION. WSO HAR VGC
Special weather statement, Jul 9, 1:22 PM EDT, 2 hours 45 minutes before
PAZ008-009-013-014-091730- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 120 PM EDT MON JUL 9 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE LOWER SUSQUEHANNA VALLEY... AT 100 PM THE NATIONAL SEVERE STORMS FORECAST CENTER ISSUED A SEVERE THUNDERSTORM WATCH FOR MUCH OF PENNSYLVANIA TO INCLUDE THE LOWER SUSQUEHANNA VALLEY. PERSONS LIVING IN CENTRE...FULTON...HUNTINGDON...JUNIATA...MIFFLIN... NORTHUMBERLAND...MONTOUR...SYNDER...UNION...ADAMS...CUMBERLAND...DAUPHIN... FRANKLIN...LANCASTER...LEBANON...PERRY...AND YORK COUNTIES SHOULD KEEP AN EYE ON THE SKY FOR THREATENING THUNDERSTORMS...AND LISTEN FOR FORECAST UPDATES AND POSSIBLE WARNINGS ON THE CURRENT WEATHER SITUATION. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDESTORMS IN AND CLOSE TO THE WATCH AREA. IT'S BEST TO TAKE SHELTER INSIDE A STRONG BUILDING AND AWAY FROM GLASS. IF YOU ARE CAUGHT OUTSIDE...BE AWARE THAT LIGHTNING IS AS MUCH A HAZARD AS HIGH WIND. AVOID ISOLATED TREES AND METAL OBJECTS. WSO HAR VGC
Special weather statement, Jul 9, 1:45 PM EDT, 2 hours 22 minutes before
PAZ007-008-014-091845- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 145 PM EDT MON JUL 9 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PORTIONS OF NORTHCENTRAL PENNSYLVANIA UNTIL 900 PM THIS EVENING... THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING WINDS WILL EXIST UNTIL 900 PM THIS EVENING FOR LYCOMING...SULLIVAN...AND CLINTON COUNTIES. AT 130 PM NATIONAL WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS OVER POTTER..CAMERON..CENTER AND CLINTON COUNTIES. THIS AREA OF THUNDERSTORMS EXTENDED WEST TO THE PENNSYLVANIA/OHIO BORDER. NO SEVERE WEATHER HAS AS YET BEEN REPORTED IN NORTHCENTRAL PENNSYLVANIA. PERSONS IN OR CL OSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE ADVISED TO BE ALERT TO LOCAL WEATHER DEVELOPMENTS AND TAKE SHELTER IF THREATENING WEATHER IS SIGHTED. KF/TG/PG
Special weather statement, Jul 9, 2:45 PM EDT, 1 hour 22 minutes before
PAZ007-008-014-091945- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 245 PM EDT MON JUL 9 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT FOR PORTIONS OF NORTHCENTRAL PENNSYLVANIA UNTIL 900 PM THIS EVENING... THE THREAT OF SEVERE THUNDERSTORMS WITH LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING WINDS WILL EXIST UNTIL 900 PM THIS EVENING FOR LYCOMING...SULLIVAN...AND CLINTON COUNTIES. AT 235 PM NATIONAL WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS COVERING MOST OF CENTRAL AND NORTHCENTRAL PENNSYLVANIA. THE HEAVIEST THUNDERSTORMS WERE LOCATED OVER PORTIONS OF CLEARFIELD...CENTRE..AND UNION COUNTIES. THIS AREA OF THUNDERSTORMS EXTENDED WEST TO THE PENNSYLVANIA/OHIO BORDER. THE THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT ABOUT 40 MILES PER HOUR. PERSONS IN OR CLOSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE ADVISED TO BE ALERT TO LOCAL WEATHER DEVELOPMENTS AND TAKE SHELTER IF THREATENING WEATHER IS nSIGHTED. KF/TG/PG
Special weather statement, Jul 9, 4:05 PM EDT, 2 minutes before
PAZ007-008-014-092105- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLIAMSPORT PA 405 PM EDT MON JUL 9 1990 ...THE SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF NORTHCENTRAL PENNSYLVANIA UNTIL 900 PM...THIS INCLUDES SOUTHERN LYCOMING AND SOUTHERN CLINTON COUNTIES...IT HAS BEEN CANCELLED FOR NORTHERN LYCOMING...NORTHERN CLINTON...AND ALL OF SULLIVAN COUNTY... AT 400 PM NATIONAL WEATHER SERVICE RADAR SHOWED SHOWERS AND THUNDERSTORMS SOUTH OF A LINE FROM WYALUSING TO DUBOIS. THE HEAVIEST THUNDERSTORMS HAVE MOVED INTO EAST CENTRAL PENNSYLVANIA. THE THUNDERSTORMS WERE MOVING TO THE EAST SOUTHEAST AT ABOUT 40 MILES PER HOUR. PERSONS IN OR CLOSE TO THE SEVERE THUNDERSTORM WATCH AREA ARE ADVISED TO BE ALERT TO LOCAL WEATHER DEVELOPMENTS AND TAKE SHELTER IF THREATENING WEATHER IS SIGHTED. KF/TG/PG
Special weather statement, Jul 9, 4:06 PM EDT, 1 minute before
PAZ008-009-013-014-092100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HARRISBURG PA. 405 PM EDT MON JUL 9 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 900 PM EDT FOR THE LOWER SUSQUEHANNA VALLEY... AT 400 PM THE HARRISBURG RADAR SHOWS THUNDERSTORMS OVER SOUTHERN CUMBERLAND NORTHERN ADAMS AND YORK COUNTIES. THE THUNDERSTORMS HAVE BEEN PRODUCING PEA SIZE HAIL AND GUSTY WINDS TO AOURND 50 MPH. HAM RADIO OPERATORS REPORT THESE CONDITIONS IN SOUTH CUMBERLAND AND NORTHERN ADAMS COUTNIES. PERSONS IN ADAMS AND YORK COUNTIES SHOULD BE ON THE LOOKOUT FOR THESE STORMS BETWEEN 4 AND 6PM. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR SEVERE THUNDESTORMS IN AND CLOSE TO THE WATCH AREA. IT'S BEST TO TAKE SHELTER INSIDE A STRONG BUILDING AND AWAY FROM GLASS. IF YOU ARE CAUGHT OUTSIDE...BE AWARE THAT LIGHTNING IS AS MUCH A HAZARD AS HIGH WIND. AVOID ISOLATED TREES AND METAL OBJECTS. WSO HAR HURLEY
The office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 1:34 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 41 min |
| Jul 9, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Union | 56 min |
| Jul 9, 2:04 PM EDT | Severe Thunderstorm Warning | CTP | Snyder | 56 min |
| Jul 9, 2:42 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Mifflin, Snyder, Union | 48 min |
| Jul 9, 3:09 PM EDT | Severe Thunderstorm Warning | CTP | Carbon, Monroe, Northampton | 66 min |
| Jul 9, 4:31 PM EDT | Severe Thunderstorm Warning | CTP | Lancaster, York | 44 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.