Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this special weather statement at Jun 19, 2021, 4:56 AM EDT for Allegheny County, Pennsylvania. It was in force for 34 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
- Jun 19, 2021, 4:56 AM EDT (08:56 UTC)
- Expired
- Jun 19, 2021, 5:30 AM EDT
- In force
- 34 min
- Issued by
- NWS Pittsburgh, PA
County Allegheny County, PA
The radar
The Pittsburgh radar (KPBZ), 23 km from the middle of the area, began a volume at 08:59 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 00:00Z, 8.9 hours before the alert went out and 11 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
- 212 J/kg
- Mixed-layer CIN
- -145 J/kg
- Mixed-layer LCL
- 1192 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 347 m²/s²
- 0-3 km storm-relative helicity
- 540 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 9.8
The text
As transmitted.
044
WWUS81 KPBZ 190856
SPSPBZ
Special Weather Statement
National Weather Service Pittsburgh PA
456 AM EDT Sat Jun 19 2021
PAZ021-073-190930-
Westmoreland-Allegheny-
456 AM EDT Sat Jun 19 2021
...AN AREA OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING GUSTY WIND
WILL AFFECT CENTRAL ALLEGHENY AND WEST CENTRAL WESTMORELAND
COUNTIES...
At 456 AM EDT, strong thunderstorms were clustered over Pittsburgh,
moving east at 40 mph.
Wind gusts up to 45 mph are possible with this storm.
Locations impacted include...
Pittsburgh... Penn Hills...
Mount Lebanon... Bethel Park...
Ross Township... McCandless Township...
Monroeville... Moon Township...
McKeesport... Franklin Park...
Shaler Township... Plum...
This includes the following highways...
Pennsylvania Turnpike between mile markers 49 and 70.
Interstate 79 in Pennsylvania between mile markers 57 and 74.
Interstate 376 in Pennsylvania between mile markers 55 and 84.
Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a building or vehicle.
LAT...LON 4046 8027 4063 8013 4055 7992 4048 7960
4023 7968 4031 7994
TIME...MOT...LOC 0856Z 280DEG 34KT 4044 7996
$$
RACKLEYThe office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 12:21 AM EDT | Special Weather Statement | PBZ | Armstrong | 24 min |
| Jun 19, 5:11 AM EDT | Special Weather Statement | PBZ | Westmoreland | 34 min |
| Jun 19, 6:34 PM EDT | Special Weather Statement | PBZ | Mercer | 26 min |
| Jun 19, 6:47 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer, Venango | 43 min |
| Jun 19, 7:33 PM EDT | Special Weather Statement | PBZ | Butler | 27 min |
| Jun 19, 3:11 AM EDT | Special Weather Statement | PBZ | Harrison | 34 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.