Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2026
Severe Thunderstorm Warning 310, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Sep 2, 2026, 8:36 AM EDT for Jefferson County, Pennsylvania. It was in force for 54 min. 3 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
- Sep 2, 2026, 8:36 AM EDT (12:36 UTC)
- Expired
- Sep 2, 2026, 9:30 AM EDT
- In force
- 54 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Jefferson County, PA
The radar
The State College radar (KCCX), 91 km from the middle of the area, began a volume at 12:36 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 |
|---|---|---|---|
| Sep 2, 8:49 AM EDT | TSTM WND DMG | 6 Wnw Brockway, PA | Trees down. |
| Sep 2, 8:57 AM EDT | TSTM WND DMG | 6 Wnw Falls Creek, PA | Two trees down. |
| Sep 2, 9:31 AM EDT | TSTM WND DMG | 2 Nnw Falls Creek, PA | Trees down. |
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, 0.6 hours before the alert went out and 134 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
- 1766 J/kg
- Mixed-layer CIN
- -58 J/kg
- Mixed-layer LCL
- 989 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 5.3
The text
As transmitted.
753
WUUS51 KPBZ 021236
SVRPBZ
PAC065-021330-
/O.NEW.KPBZ.SV.W.0310.260902T1236Z-260902T1330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
836 AM EDT Wed Sep 2 2026
The National Weather Service in Pittsburgh has issued a
* Severe Thunderstorm Warning for...
Northern Jefferson PA County in west central Pennsylvania...
* Until 930 AM EDT.
* At 836 AM EDT, severe thunderstorms were located along a line from
24 miles north of Brockway to 12 miles north of Clarion, or along a
line from 19 miles northeast of Marienville to 12 miles north of
Clarion, moving southeast at 45 mph.
HAZARD...60 mph wind gusts and small hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Brookville, Reynoldsville, Brockway, Sykesville, Falls Creek,
Sigel, Clear Creek State Park and Clarington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms are capable of producing damaging winds.
Continuous cloud to ground lightning is occurring with these storms.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4102 7880 4124 7921 4133 7921 4132 7919
4134 7918 4133 7917 4134 7917 4133 7916
4134 7914 4133 7911 4135 7908 4135 7902
4138 7897 4136 7896 4126 7874 4123 7874
4123 7871 4120 7871 4120 7877 4113 7880
TIME...MOT...LOC 1236Z 306DEG 36KT 4159 7878 4141 7898 4137 7932
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
MLB2 follow-up statements
140
WWUS51 KPBZ 021313
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
913 AM EDT Wed Sep 2 2026
PAC065-021330-
/O.CON.KPBZ.SV.W.0310.000000T0000Z-260902T1330Z/
Jefferson PA-
913 AM EDT Wed Sep 2 2026
...SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM EDT FOR
NORTHERN JEFFERSON PA COUNTY...
At 913 AM EDT, severe thunderstorms were located along a line from 23
miles east of Brockway to near Reynoldsville, or along a line from 39
miles east of Marienville to 8 miles east of Brookville, moving
southeast at 45 mph.
HAZARD...60 mph wind gusts and small hail.
SOURCE...Law enforcement reported trees down near Dubois Regional
Airport.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Brookville, Reynoldsville, Brockway, Sykesville, Falls Creek,
Sigel, Clear Creek State Park and Clarington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Seek shelter inside a well-built structure and stay away from
windows. These storms have produced damaging winds.
Continuous cloud to ground lightning is occurring with these storms.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4102 7880 4124 7921 4133 7921 4132 7919
4134 7918 4133 7917 4134 7917 4133 7916
4134 7914 4133 7911 4135 7908 4135 7902
4138 7897 4136 7896 4126 7874 4123 7874
4123 7871 4120 7871 4120 7877 4113 7880
TIME...MOT...LOC 1236Z 306DEG 36KT 4159 7878 4141 7898 4137 7932
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<1.00 IN
WIND THREAT...OBSERVED
MAX WIND GUST...60 MPH
$$
MLB200
WWUS51 KPBZ 021327
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
927 AM EDT Wed Sep 2 2026
PAC065-021337-
/O.EXP.KPBZ.SV.W.0310.000000T0000Z-260902T1330Z/
Jefferson PA-
927 AM EDT Wed Sep 2 2026
...SEVERE THUNDERSTORM WARNING WILL EXPIRE AT 930 AM EDT FOR NORTHERN
JEFFERSON PA COUNTY...
The Severe Thunderstorm Warning that was previously in effect has
been reissued for Jefferson PA County and is in effect until 1015 AM
EDT. Please refer to that bulletin for the latest severe weather
information. To report severe weather, contact your nearest law
enforcement agency. They will send your report to the National
Weather Service office.
&&
LAT...LON 4102 7880 4124 7921 4133 7921 4132 7919
4134 7918 4133 7917 4134 7917 4133 7916
4134 7914 4133 7911 4135 7908 4135 7902
4138 7897 4136 7896 4126 7874 4123 7874
4123 7871 4120 7871 4120 7877 4113 7880
TIME...MOT...LOC 1313Z 306DEG 36KT 4136 7837 4118 7857 4115 7891
$$
MLBThe office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 7:49 AM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 56 min |
| Sep 2, 8:15 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 60 min |
| Sep 2, 9:12 AM EDT | Severe Thunderstorm Warning | PBZ | Butler, Clarion, Mercer, Venango | 48 min |
| Sep 2, 9:27 AM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 48 min |
| Sep 2, 5:06 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer, Venango | 39 min |
| Sep 2, 5:53 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 26 min |
| Sep 2, 6:11 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Venango | 26 min |
| Sep 2, 6:34 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest | 26 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2026Every severe thunderstorm warning in 2026
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.