Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 149, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 13, 2021, 4:25 PM EDT for 4 counties in Pennsylvania. It was in force for 50 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 13, 2021, 4:25 PM EDT (20:25 UTC)
- Expired
- Jul 13, 2021, 5:15 PM EDT
- In force
- 50 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Armstrong County, PA, Clarion County, PA, Indiana County, PA, Jefferson County, PA
The radar
The Pittsburgh radar (KPBZ), 86 km from the middle of the area, began a volume at 20:28 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 13, 5:01 PM EDT | TSTM WND DMG | Millville, PA | ROUTE 28 CLOSED IN THE AREA OF 217 BROOKVILLE ST DUE TO LIVE POWER LINES. |
| Jul 13, 5:04 PM EDT | TSTM WND DMG | 2 Ssw Shannondale, PA | TREES DOWN ALONG ROUTE 28. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 13, 1:37 PM EDT | Severe Thunderstorm Watch | SPC | 10 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 8.4 hours before the alert went out and 86 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
- 107 J/kg
- Mixed-layer CIN
- -136 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 84 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
481
WUUS51 KPBZ 132025
SVRPBZ
PAC005-031-063-065-132115-
/O.NEW.KPBZ.SV.W.0149.210713T2025Z-210713T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
425 PM EDT Tue Jul 13 2021
The National Weather Service in Pittsburgh has issued a
* Severe Thunderstorm Warning for...
North central Indiana County in west central Pennsylvania...
Southwestern Jefferson County in west central Pennsylvania...
Central Armstrong County in west central Pennsylvania...
Southeastern Clarion County in west central Pennsylvania...
* Until 515 PM EDT.
* At 425 PM EDT, a severe thunderstorm was located over Ford City, or
near Kittanning, moving northeast at 40 mph.
HAZARD...Wind gusts to 60 mph.
SOURCE...Radar.
IMPACT...Expect damage to trees and power lines, resulting in some
power outages.
* Locations impacted include...
Punxsutawney... Kittanning...
Ford City... New Bethlehem...
West Kittanning... Rural Valley...
Dayton... Summerville...
West Hills... Hawthorn...
Manorville... Ford Cliff...
This includes Interstate 80 in Pennsylvania between mile markers 68
and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a building.
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4062 7953 4084 7961 4110 7926 4120 7931
4113 7909 4092 7897
TIME...MOT...LOC 2025Z 221DEG 35KT 4077 7954
HAIL...<.75IN
WIND...60MPH
$$3 follow-up statements
561
WWUS51 KPBZ 132033
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
433 PM EDT Tue Jul 13 2021
PAC005-031-063-065-132115-
/O.CON.KPBZ.SV.W.0149.000000T0000Z-210713T2115Z/
Indiana PA-Jefferson PA-Armstrong PA-Clarion PA-
433 PM EDT Tue Jul 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR NORTH CENTRAL INDIANA...SOUTHWESTERN JEFFERSON...CENTRAL
ARMSTRONG AND SOUTHEASTERN CLARION COUNTIES...
At 433 PM EDT, a severe thunderstorm was located over Kittanning,
moving northeast at 40 mph.
HAZARD...Wind gusts to 60 mph.
SOURCE...Radar.
IMPACT...Expect damage to trees and power lines, resulting in some
power outages.
Locations impacted include...
Punxsutawney... Kittanning...
Ford City... New Bethlehem...
West Kittanning... Rural Valley...
Dayton... Summerville...
West Hills... Hawthorn...
Manorville... Ford Cliff...
This includes Interstate 80 in Pennsylvania between mile markers 68
and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move to an interior room on the lowest floor of a building.
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4071 7952 4084 7961 4110 7926 4120 7931
4113 7909 4092 7897
TIME...MOT...LOC 2033Z 221DEG 35KT 4083 7947
HAIL...<.75IN
WIND...60MPH
$$538
WWUS51 KPBZ 132044
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
444 PM EDT Tue Jul 13 2021
PAC063-132054-
/O.CAN.KPBZ.SV.W.0149.000000T0000Z-210713T2115Z/
Indiana PA-
444 PM EDT Tue Jul 13 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL INDIANA COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM EDT for
west central Pennsylvania.
LAT...LON 4084 7941 4091 7951 4110 7926 4120 7931
4113 7909 4108 7906
TIME...MOT...LOC 2044Z 221DEG 35KT 4092 7937
$$
PAC005-031-065-132115-
/O.CON.KPBZ.SV.W.0149.000000T0000Z-210713T2115Z/
Jefferson PA-Armstrong PA-Clarion PA-
444 PM EDT Tue Jul 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WEST CENTRAL JEFFERSON...EAST CENTRAL ARMSTRONG AND SOUTHEASTERN
CLARION COUNTIES...
At 444 PM EDT, a severe thunderstorm was located near New Bethlehem,
or 9 miles northeast of Kittanning, moving northeast at 40 mph.
HAZARD...Wind gusts to 60 mph.
SOURCE...Radar.
IMPACT...Expect damage to trees and power lines, resulting in some
power outages.
Locations impacted include...
New Bethlehem... Summerville...
Hawthorn... Worthville...
Templeton... Distant...
This includes Interstate 80 in Pennsylvania between mile markers 68
and 70.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm has a history of producing damaging wind gusts. Move
indoors immediately and stay away from windows!
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4084 7941 4091 7951 4110 7926 4120 7931
4113 7909 4108 7906
TIME...MOT...LOC 2044Z 221DEG 35KT 4092 7937
HAIL...<.75IN
WIND...60MPH
$$400
WWUS51 KPBZ 132100
SVSPBZ
Severe Weather Statement
National Weather Service Pittsburgh PA
500 PM EDT Tue Jul 13 2021
PAC005-031-065-132115-
/O.CON.KPBZ.SV.W.0149.000000T0000Z-210713T2115Z/
Jefferson PA-Armstrong PA-Clarion PA-
500 PM EDT Tue Jul 13 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR WEST CENTRAL JEFFERSON...EAST CENTRAL ARMSTRONG AND SOUTHEASTERN
CLARION COUNTIES...
At 500 PM EDT, a severe thunderstorm was located near New Bethlehem,
or 11 miles southwest of Brookville, moving northeast at 40 mph.
HAZARD...Wind gusts to 60 mph.
SOURCE...Radar.
IMPACT...Expect damage to trees and power lines, resulting in some
power outages.
Locations impacted include...
New Bethlehem... Summerville...
Hawthorn... Worthville...
Distant...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm has a history of producing damaging wind gusts. Move
indoors immediately and stay away from windows!
Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.
&&
LAT...LON 4093 7931 4100 7940 4110 7926 4117 7920
4113 7909 4108 7906
TIME...MOT...LOC 2100Z 221DEG 35KT 4104 7923
HAIL...<.75IN
WIND...60MPH
$$The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 8:00 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 30 min |
| Jul 13, 3:23 AM EDT | Special Weather Statement | PBZ | Washington | 37 min |
| Jul 13, 3:37 AM EDT | Severe Thunderstorm Warning | PBZ | Washington | 22 min |
| Jul 13, 3:53 AM EDT | Special Weather Statement | PBZ | Allegheny | 37 min |
| Jul 13, 4:06 AM EDT | Special Weather Statement | PBZ | Westmoreland | 24 min |
| Jul 13, 4:10 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 35 min |
| Jul 13, 4:17 AM EDT | Special Weather Statement | PBZ | Armstrong | 28 min |
| Jul 13, 4:41 AM EDT | Special Weather Statement | PBZ | Indiana | 34 min |
| Jul 13, 5:24 AM EDT | Special Weather Statement | PBZ | Indiana | 36 min |
| Jul 13, 3:04 PM EDT | Special Weather Statement | PBZ | Lawrence | 26 min |
| Jul 13, 3:14 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 31 min |
| Jul 13, 3:25 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 35 min |
| Jul 13, 3:36 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Mercer, Venango | 39 min |
| Jul 13, 3:39 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler | 51 min |
| Jul 13, 4:05 PM EDT | Severe Thunderstorm Warning | PBZ | Forest, Mercer, Venango | 40 min |
| Jul 13, 4:11 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 49 min |
| Jul 13, 4:14 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 31 min |
| Jul 13, 4:41 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Venango | 34 min |
| Jul 13, 4:47 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Forest, Jefferson, Venango | 43 min |
| Jul 13, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 40 min |
| Jul 13, 5:00 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 45 min |
| Jul 13, 5:08 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 52 min |
| Jul 13, 5:12 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Jefferson, Venango | 48 min |
| Jul 13, 5:25 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson, Westmoreland | 50 min |
| Jul 13, 5:47 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Greene, Washington, Westmoreland | 28 min |
| Jul 13, 6:08 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson, Westmoreland | 37 min |
| Jul 13, 6:14 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 31 min |
| Jul 13, 6:43 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Indiana, Westmoreland | 32 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 2021Every severe thunderstorm warning 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.