Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 49, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jun 30, 1990, 6:20 PM EDT for Bedford County, Cambria County, Somerset County, Pennsylvania. It was in force for 55 min.
The area
The counties it named.
The facts
- Issued
- Jun 30, 1990, 6:20 PM EDT (22:20 UTC)
- Expired
- Jun 30, 1990, 7:15 PM EDT
- In force
- 55 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Bedford County, PA, Cambria County, PA, Somerset 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
Pittsburgh, PA (KPIT), launched 12:00Z, 10.3 hours before the alert went out and 118 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 87 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 302226
SVRPIT
PAC003-005-009-021-063-111-129-302315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
620 PM EDT SAT JUN 30 1990
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM EDT
FOR PEOPLE IN THE FOLLOWING COUNTIES...
IN WEST PENNSYLVANIA
...ALLEGHENY...ARMSTRONG...BEDFORD...CAMBRIA...INDIANA
...SOMERSET...WESTMORELAND
RADAR CONTINUED TO SHOW SEVERAL SEVERE STORMS MOVING SOUTHEASTWARD AT
35 MPH. ONE WAS GOING THROUGH ARMSTRONG AND INDIANA COUNTIES INTO
CAMBRIA COUNTY. ANOTHER WAS GOING THROUGH ALLEGHENY INTO WESTMORELAND
COUNTY...AND ANOTHER TWO WERE MOVING THROUGH SOMERSET INTO BEDFORD COUN
THESE ARE DANGEROUS STORMS WITH NUMEROUS REPORTS OF DOWNED TREES AND
POWER LINES...LARGE HAIL AND DANGEROUS LIGHTNING...AND BRIEFLY FLOODED
ROADS. WHEN A SEVERE STORMS APPROACHES...TAKE COVER INDOORS AND AWAY
FROM GLASS. IF YOU ARE IN A FLOOD PRONE AREA...LOOKOUT FOR REPEATED
HEAVY DOWNPOURS. IF YOU MUST GO TO HIGHER GROUND...DONT GO THROUGH
FLOODING TO GET THERE.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 30, 4:42 PM EDT, 1 hour 38 minutes before
PAZ001>006-013>015-WVZ001-302200- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 445 PM EDT SAT JUN 30 1990 ...SEVERE THUNDERSTORM WATCH FOR THE NORTHERN WEST VIRGINIA PANHANDLE AND MOST OF WESTERN PENNSYLVANIA TIL 10 PM... JUST BEFORE 4 PM...RADAR SHOWED A THUNDERSTORM WITH STRONG WIND... DANGEROUS LIGHTNING AND HEAVY DOWNPOURS MOVING INTO LAWRENCE BEAVER SOUTHERN BUTLER AND WESTERN ALLEGHENY COUNTIES. MOVEMENT WAS TO THE SOUTHEAST AT 40 MILES AN HOUR. THERE WERE OTHER STRONG STORMS OVER WESTMORELAND COUNTY MOVING INTO THE JOHNSTOWN AREA AND ANOTHER OVER BLAIR COUNTY MOVING INTO NORTHERN BEDFORD AND HUNTINGDON COUNTIES. IF A STRONG STORM APPROACHES...TAKE COVER INDOORS AND AWAY FROM GLASS. REMEMBER ALSO HEAVY DOWNPOURS CAN CAUSE FLOODING. A WATCH OR WARNING IS ISSUED. THERE IS SOME LIGHT AT THE END OF THE TUNNEL IN THE FORM OF A COLD FRONT MOVING IN FROM THE UPPER MIDWEST. IT IS EXPECTEHD TO CROSS WESTERN PENNSYLVANIA LATER TONIGHT FINALLY BRINGING A BREAK IN THE HEAT AND HUMIDITY FOR SUNDAY. RWH
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 4:49 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 56 min |
| Jun 30, 5:26 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset, Westmoreland | 64 min |
| Jun 30, 5:26 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 64 min |
| Jun 30, 5:40 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong | 50 min |
| Jun 30, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 55 min |
| Jun 30, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Washington | 65 min |
| Jun 30, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 57 min |
| Jun 30, 7:19 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Westmoreland | 41 min |
| Jun 30, 7:19 PM EDT | Severe Thunderstorm Warning | PBZ | Bedford, Cambria | 41 min |
| Jun 30, 7:56 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler, Fayette, Washington, Westmoreland | 64 min |
| Jun 30, 7:56 PM EDT | Flash Flood Warning | PBZ | Clarion, Jefferson | 64 min |
| Jun 30, 7:56 PM EDT | Flash Flood Warning | PBZ | Clearfield | 64 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.