Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this special weather statement at Aug 1, 2021, 2:21 PM EDT for Armstrong County, Clarion County, Jefferson County, Pennsylvania. It was in force for 39 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 1, 2021, 2:21 PM EDT (18:21 UTC)
- Expired
- Aug 1, 2021, 3:00 PM EDT
- In force
- 39 min
- Issued by
- NWS Pittsburgh, PA
Counties Armstrong County, PA, Clarion County, PA, Jefferson County, PA
The radar
The Pittsburgh radar (KPBZ), 95 km from the middle of the area, began a volume at 18:22 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, 6.4 hours before the alert went out and 97 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
- 9 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 1078 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
423 WWUS81 KPBZ 011821 SPSPBZ Special Weather Statement National Weather Service Pittsburgh PA 221 PM EDT Sun Aug 1 2021 PAZ008-014>016-022-011900- Armstrong-Jefferson-Butler-Clarion-Venango- 221 PM EDT Sun Aug 1 2021 ...A LINE OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING SMALL HAIL WILL AFFECT SOUTHERN VENANGO...NORTHEASTERN BUTLER...SOUTHWESTERN JEFFERSON...CENTRAL ARMSTRONG AND CLARION COUNTIES... At 221 PM EDT, radar indicated strong thunderstorms were located along a line extending from near Knox to 10 miles northeast of Shanor-Northvue. Movement was southeast at 35 mph. Small hail is possible with these storms. Locations impacted include... Clarion... Kittanning... Brookville... Knox... Rimersburg... Ford City... Reynoldsville... New Bethlehem... West Kittanning... Chicora... East Brady... Parker... This includes Interstate 80 in Pennsylvania between mile markers 43 and 81, and between mile markers 85 and 86. LAT...LON 4110 7887 4074 7960 4107 7991 4133 7944 TIME...MOT...LOC 1821Z 307DEG 32KT 4127 7945 4104 7982 $$
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 1:27 PM EDT | Special Weather Statement | PBZ | Mercer | 33 min |
| Aug 1, 1:44 PM EDT | Special Weather Statement | PBZ | Forest | 31 min |
| Aug 1, 1:50 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 25 min |
| Aug 1, 1:52 PM EDT | Special Weather Statement | PBZ | Jefferson | 38 min |
| Aug 1, 2:03 PM EDT | Special Weather Statement | PBZ | Venango | 27 min |
| Aug 1, 3:06 PM EDT | Special Weather Statement | PBZ | Armstrong | 39 min |
| Aug 1, 3:38 PM EDT | Special Weather Statement | PBZ | Allegheny | 37 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.