Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 21, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Apr 8, 1998, 4:51 PM EDT for Mercer County, Pennsylvania. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 8, 1998, 4:51 PM EDT (20:51 UTC)
- Expired
- Apr 8, 1998, 5:45 PM EDT
- In force
- 54 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Mercer County, PA
The radar
The Pittsburgh radar (KPBZ), 86 km from the middle of the area, began a volume at 20:52 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 8.9 hours before the alert went out and 100 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
- 19 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 824 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 216 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
369 WUUS1 KPIT 082055 RRA SVRPIT PAC085-082145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 451 PM EDT WED APR 8 1998 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM EDT FOR THE FOLLOWING LOCATION... IN NORTHWEST PENNSYLVANIA ...MERCER COUNTY AT 555 PM EDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE STORM AROUND 8 MILES NORTH OF SHARON...MOVING EAST AROUND 25 MPH. THIS STORM WILL LIKELY PRODUCE LARGE HAIL AND MAY ALSO PRODUCE DAMAGING WIND GUSTS NEAR 60 MPH AS IT PASSES NEAR TRANSFER AND FREDONIA. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND OVER 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR BUILDING. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 61 min |
| Apr 8, 4:23 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 52 min |
| Apr 8, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 62 min |
| Apr 8, 4:45 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 60 min |
| Apr 8, 5:05 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 40 min |
| Apr 8, 5:10 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 50 min |
| Apr 8, 5:16 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 44 min |
| Apr 8, 5:28 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 47 min |
| Apr 8, 5:37 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 53 min |
| Apr 8, 5:50 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 40 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1998Every severe thunderstorm warning in 1998
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; radar from the NEXRAD Level II archive.