Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this special weather statement at Aug 4, 2021, 4:03 PM EDT for Westmoreland County, Pennsylvania. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2021, 4:03 PM EDT (20:03 UTC)
- Expired
- Aug 4, 2021, 4:30 PM EDT
- In force
- 27 min
- Issued by
- NWS Pittsburgh, PA
County Westmoreland County, PA
The radar
The Pittsburgh radar (KPBZ), 43 km from the middle of the area, began a volume at 20:05 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, 8.1 hours before the alert went out and 30 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
- 52 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 1110 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
049 WWUS81 KPBZ 042003 SPSPBZ Special Weather Statement National Weather Service Pittsburgh PA 403 PM EDT Wed Aug 4 2021 PAZ021-073-042030- Westmoreland-Allegheny- 403 PM EDT Wed Aug 4 2021 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL ALLEGHENY AND WEST CENTRAL WESTMORELAND COUNTIES... At 402 PM EDT, a strong thunderstorm was located over Trafford, or near Monroeville. The storm is nearly stationary. Winds in excess of 30 mph are possible with this storm. Locations impacted include... Penn Hills, Monroeville, Plum, Murrysville, North Versailles, White Oak, Wilkins Township, Duquesne, Turtle Creek, North Braddock, Irwin, and Pitcairn. This includes the following highways... Pennsylvania Turnpike between mile markers 54 and 67. Interstate 376 in Pennsylvania between mile markers 82 and 84. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. LAT...LON 4038 7986 4051 7975 4045 7954 4029 7970 TIME...MOT...LOC 2002Z 301DEG 3KT 4037 7973 $$
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 6:15 PM EDT | Special Weather Statement | PBZ | Butler | 30 min |
| Aug 4, 6:54 PM EDT | Special Weather Statement | PBZ | Ohio | 36 min |
| Aug 4, 7:31 PM EDT | Areal Flood Advisory | PBZ | Marshall, Ohio | 8 min |
| Aug 4, 7:39 PM EDT | Flash Flood Warning | PBZ | Marshall, Ohio | 111 min |
| Aug 4, 6:19 PM EDT | Special Weather Statement | PBZ | Belmont | 26 min |
Nearby
Special Weather Statements in Pennsylvania, 2021Every special weather statement in 2021
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.