Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 21, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 7, 1989, 6:51 PM EDT for Armstrong County, Indiana County, Pennsylvania. It was in force for 69 min. 3 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
- Jul 7, 1989, 6:51 PM EDT (22:51 UTC)
- Expired
- Jul 7, 1989, 8:00 PM EDT
- In force
- 69 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Armstrong County, PA, Indiana 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 7, 7:05 PM EDT | Thunderstorm Wind 0 | Indiana, PA | |
| Jul 7, 7:15 PM EDT | Thunderstorm Wind 0 | Armstrong, PA | |
| Jul 7, 7:30 PM EDT | Hail 0.75 | Indiana, 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
Pittsburgh, PA (KPIT), launched 12:00Z, 10.9 hours before the alert went out and 78 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
- 18 J/kg
- Mixed-layer CIN
- -132 J/kg
- Mixed-layer LCL
- 1092 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 48 m²/s²
- 0-3 km storm-relative helicity
- 14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KPIT 072254
SVRPIT
PAC005-013-021-063-080000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
651 PM EDT FRI JUL 7 1989
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 800 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN WEST PENNSYLVANIA
...ARMSTRONG...BLAIR...INDIANA...CAMBRIA
PITTSBURGH WEATHER RADAR INDICATES HEAVY THUNDERSTORMS EXTENDING FROM
BUTLER AND CLARION COUNTIES EXTENDING EAST INTO THE CENTRAL AND
SOUTHERN MOUNTAINS OF WESTERN PENNSYLVANIA. THE THUNDERSTORMS ARE
MOVING SOUTHEAST AT 35 MPH.
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...8DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO
DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.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 7, 2:45 PM EDT, 4 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 244 PM EDT FRI JUL 07 1989 ...THUNDERSTORMS WITH STRONG GUSTY WINDS AND HEAVY DOWNPOURS FOR THE REMAINDER OF AFTERNOON AND EVENING ACROSS WESTERN PENNSYLVANIA AND THE NORTHERN PANHANDLE OF WEST VIRGINIA... FOR THE REMAINDER OF THIS AFTERNOON AND EVENING THERE IS A DOUBLE THREAT OF SEVERE WEATHER IN WESTERN PENNSYLVANIA AND THE NORTHERN PANHANDLE OF WEST VIRGINIA. WE COULD HAVE THUNDERSTORMS WITH DAMAGING WINDS AND DANGEROUS LIGHTNING AND ALSO SLOW MOVING THUNDERSTORMS COULD DROP A LOT OF RAIN IN A SHORT PERIOD OF TIME. LOW LYING AND POOR DRAINAGE AREAS ARE ESPECIALLY VULNERABLE TO FLOODING FROM HEAVY DOWNPOURS. RESIDENTS SHOULD BE ON THE LOOKOUT FOR BOTH SEVERE THUNDERSTORMS AND ALSO HEAVY DOWNPOURS ASSOCIATED WITH THESE STORMS THIS AFTERNOON AND EVENING. NEVER EVER DRIVE THROUGH FLOODED ROADWAYS. YOUR CAR FEELS VERY SAFE AND VERY HEAVY...BUT IT IS ALSO VERY BUOYANT AND WILL FLOAT WITH AS LITTLE AS 2 FEET OF WATER. A COLD FRONT MOVING FROM NORTH TO SOUTH ACROSS WESTERN PENNSYLVANIA AND THE NORTHERN PANHANDLE OF WEST VIRGINIA WILL PRODUCE THESE THUNDERSTORMS. THE FRONT WILL MOVE SOUTH OF PENNSYLVANIA LATE THIS EVENING AND END THE THREAT OF SEVERE STORMS. STAIRS/GIORDANO
Special weather statement, Jul 7, 4:24 PM EDT, 2 hours 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 425 PM EDT FRI JUL 07 1989 ...THUNDERSTORMS WITH HEAVY DOWNPOURS MOVING INTO BUTLER..ARMSTRONG AND CLARION COUNTIES... A LINE OF THUNDERTORMS EXTENDING FROM TIONESTA IN ELK COUNTY TO MERCER IN MERCER COUNTY IS MOVING SOUTHEAST AT 30 MPH. THESE THUNDERSTORMS WILL MOVE THROUGH BUTLER...ARMSTRONG..CLARION AND JEFFERSON COUNTIES IN WESTERN PENNSYLVANIA BETWEEN 430 AND 630 PM. SOME OF THESE THUNDERSTORMS MAY BE ACCOMPANIED BY STRONG GUSTY WINDS.. HAIL..LOCALLY HEAVY DOWNPOURS AND DANGEROUS LIGHTNING. SOME OF THE LOCALLY HEAVY DOWNPOURS MAY PRODUCE ENOUGH RAIN TO CAUSE POOR DRAINAGE FLOODING. IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. DO NOT DRIVE THROUGH FLOODED AREAS. DAVIS/SISK
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 68 min |
| Jul 7, 5:41 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Jefferson | 64 min |
| Jul 7, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 61 min |
| Jul 7, 6:51 PM EDT | Severe Thunderstorm Warning | PBZ | Blair, Cambria | 69 min |
| Jul 7, 7:57 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Indiana, Westmoreland | 63 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1989Every severe thunderstorm warning in 1989
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.