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, 12:21 AM EDT for Armstrong County, Pennsylvania. It was in force for 24 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, 12:21 AM EDT (04:21 UTC)
- Expired
- Jun 19, 2021, 12:45 AM EDT
- In force
- 24 min
- Issued by
- NWS Pittsburgh, PA
County Armstrong County, PA
The radar
The Pittsburgh radar (KPBZ), 64 km from the middle of the area, began a volume at 04:24 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, 4.4 hours before the alert went out and 59 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.
652
WWUS81 KPBZ 190421
SPSPBZ
Special Weather Statement
National Weather Service Pittsburgh PA
1221 AM EDT Sat Jun 19 2021
PAZ014-021-022-073-190445-
Armstrong-Butler-Westmoreland-Allegheny-
1221 AM EDT Sat Jun 19 2021
...AN AREA OF THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL AND
GUSTY WIND WILL AFFECT SOUTHEASTERN BUTLER...NORTHEASTERN
ALLEGHENY...NORTHWESTERN WESTMORELAND AND ARMSTRONG COUNTIES...
At 1220 AM EDT, thunderstorms were clustered over Lower Burrell, or
near Vandergrift, moving east at 40 mph.
Wind gusts up to 45 mph and small hail are possible with this storm.
Locations impacted include...
Vandergrift... Kittanning...
Apollo... Plum...
Murrysville... New Kensington...
Lower Burrell... Harrison Township...
Arnold... Tarentum...
Natrona Heights... Springdale...
LAT...LON 4053 7945 4052 7946 4051 7945 4051 7977
4089 7975 4088 7921 4077 7922
TIME...MOT...LOC 0420Z 272DEG 35KT 4059 7969
$$The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 4:56 AM EDT | Special Weather Statement | PBZ | Allegheny | 34 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.