Alert archive / Pennsylvania / Tornado Warnings in 1990
Tornado Warning 6, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this tornado warning at Jul 22, 1990, 6:57 PM EDT for Butler County, Pennsylvania. It was in force for 63 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 22, 1990, 6:57 PM EDT (22:57 UTC)
- Expired
- Jul 22, 1990, 8:00 PM EDT
- In force
- 63 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Butler 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 22, 7:15 PM EDT | Tornado F0 | Butler, 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, 11.0 hours before the alert went out and 58 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
- 6 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 609 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 82 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 222257 TORPIT PAC019-230000- BULLETIN - EBS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 657 PM EDT SUN JUL 22 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A TORNADO WARNING EFFECTIVE UNTIL 800 PM EDT FOR THE FOLLOWING LOCATION... IN WEST PENNSYLVANIA ...BUTLER COUNTY AT 655 PM WEATHER RADAR INDICATED A THUNDERSTORM IN WESTERN BUTLER COUNTY. A TORNADO WAS REPORTED IN WESTERN BUTLER COUNTY NEAR THE INTERSECTION OF ROUTE 422 AND ROUTE 19. TAKE COVER. IT WILL MOVE INTO THE MORAINE STATE PARK AREA SHORTLY. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 8:48 PM EDT | Flash Flood Warning | PBZ | Fayette, Greene | 2 hr |
| Jul 22, 4:18 PM EDT | Flash Flood Warning | PBZ | Allegheny, Butler | 102 min |
| Jul 22, 5:31 PM EDT | Tornado Warning | PBZ | Beaver | 59 min |
| Jul 22, 5:58 PM EDT | Tornado Warning | PBZ | Butler | 62 min |
| Jul 22, 6:38 PM EDT | Flash Flood Warning | PBZ | Clearfield | 67 min |
| Jul 22, 7:24 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 66 min |
Nearby
Tornado Warnings in Pennsylvania, 1990Every tornado warning in 1990Tornadoes 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.