Alert archive / Pennsylvania / Special Weather Statements in 2021
Special Weather Statement, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this special weather statement at Jul 20, 2021, 7:21 PM EDT for Venango County, Pennsylvania. It was in force for 24 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 20, 2021, 7:21 PM EDT (23:21 UTC)
- Expired
- Jul 20, 2021, 7:45 PM EDT
- In force
- 24 min
- Issued by
- NWS Pittsburgh, PA
County Venango County, PA
The radar
The Pittsburgh radar (KPBZ), 119 km from the middle of the area, began a volume at 23:22 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 7:35 PM EDT | TSTM WND DMG | Pleasantville, PA | NUMEROUS TREES DOWN |
| Jul 20, 7:45 PM EDT | TSTM WND DMG | Tionesta, PA | MULTIPLE TREES DOWN. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 11.4 hours before the alert went out and 129 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
- 66 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 852 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
921
WWUS81 KPBZ 202321
SPSPBZ
Special Weather Statement
National Weather Service Pittsburgh PA
721 PM EDT Tue Jul 20 2021
PAZ008-009-202345-
Forest-Venango-
721 PM EDT Tue Jul 20 2021
...AN AREA OF STRONG THUNDERSTORMS CAPABLE OF PRODUCING HAIL AND
GUSTY WIND WILL AFFECT NORTHERN VENANGO AND NORTHWESTERN FOREST
COUNTIES...
At 721 PM EDT, strong thunderstorms were clustered near Titusville,
or 8 miles north of Oil City, moving east at 20 mph.
Wind gusts up to 45 mph and hail up to the size of nickels are
possible with this storm.
Locations impacted include...
Oil City... Sugarcreek...
Tionesta... Hasson Heights...
Seneca... Rouseville...
Cooperstown... Woodland Heights...
Pleasantville... West Hickory...
Starr... East Hickory...
Frequent cloud to ground lightning is occurring with this storm. Seek
safe shelter inside a building or vehicle.
This storm may intensify, so monitor local radio or television
stations for additional information and possible warnings from the
National Weather Service.
LAT...LON 4148 7940 4132 7961 4149 8000 4151 7998
4151 7996 4154 7994 4154 7992 4156 7991
4160 7983 4162 7983 4162 7961 4163 7943
4163 7926
TIME...MOT...LOC 2321Z 265DEG 17KT 4155 7968
$$The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 6:01 PM EDT | Special Weather Statement | PBZ | Mercer | 44 min |
| Jul 20, 6:44 PM EDT | Special Weather Statement | PBZ | Mercer | 31 min |
| Jul 20, 6:46 PM EDT | Special Weather Statement | PBZ | Lawrence | 44 min |
| Jul 20, 6:50 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 25 min |
| Jul 20, 7:11 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 34 min |
| Jul 20, 7:33 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 27 min |
| Jul 20, 7:54 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 51 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.