Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 276, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Sep 15, 2021, 2:54 PM EDT for 4 counties in Pennsylvania. It was in force for 36 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
- Sep 15, 2021, 2:54 PM EDT (18:54 UTC)
- Expired
- Sep 15, 2021, 3:30 PM EDT
- In force
- 36 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Clinton County, PA, Lycoming County, PA, Northumberland County, PA, Union County, PA
The radar
The State College radar (KCCX), 92 km from the middle of the area, began a volume at 18:53 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 15, 11:55 AM EDT | Severe Thunderstorm Watch | SPC | 8 hr |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.9 hours before the alert went out and 241 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
- 13 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 1457 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
427
WUUS51 KCTP 151854
SVRCTP
PAC035-081-097-119-151930-
/O.NEW.KCTP.SV.W.0276.210915T1854Z-210915T1930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
254 PM EDT Wed Sep 15 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Northwestern Northumberland County in central Pennsylvania...
South central Lycoming County in north central Pennsylvania...
Northeastern Union County in central Pennsylvania...
Southeastern Clinton County in north central Pennsylvania...
* Until 330 PM EDT.
* At 253 PM EDT, a severe thunderstorm was located over Carroll,
moving east at 40 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Milton, Montoursville, Carroll, Muncy, Watsontown, Montgomery, New
Columbia, Allenwood, Elimsport, Spruce Run Reservoir, Delaware Run,
R.B. Winter State Park, West Milton, Turbotville, Loganton and
McEwensville.
For those driving on Interstate 80, this includes areas between the
Loganton and Danville exits, specifically from mile markers 185 to
216.
This includes Interstate 180 from mile markers 1 to 18.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4117 7672 4117 7673 4107 7674 4105 7676
4100 7678 4099 7720 4104 7715 4100 7730
4107 7733 4127 7681
TIME...MOT...LOC 1853Z 249DEG 34KT 4104 7720
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Evanego1 follow-up statement
914
WWUS51 KCTP 151915
SVSCTP
Severe Weather Statement
National Weather Service State College PA
315 PM EDT Wed Sep 15 2021
PAC035-151924-
/O.CAN.KCTP.SV.W.0276.000000T0000Z-210915T1930Z/
Clinton PA-
315 PM EDT Wed Sep 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLINTON COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central and north central Pennsylvania.
LAT...LON 4099 7710 4106 7706 4114 7710 4125 7680
4117 7672 4117 7673 4107 7674 4105 7676
4100 7678
TIME...MOT...LOC 1914Z 251DEG 31KT 4108 7699
$$
PAC081-097-119-151930-
/O.CON.KCTP.SV.W.0276.000000T0000Z-210915T1930Z/
Northumberland PA-Lycoming PA-Union PA-
315 PM EDT Wed Sep 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR NORTHWESTERN NORTHUMBERLAND...SOUTH CENTRAL LYCOMING AND
NORTHEASTERN UNION COUNTIES...
At 314 PM EDT, a severe thunderstorm was located near Spruce Run
Reservoir, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Milton, Muncy, Watsontown, Montgomery, New Columbia, Allenwood,
Elimsport, Delaware Run, Spruce Run Reservoir, West Milton,
Turbotville and McEwensville.
For those driving on Interstate 80, this includes areas between the
Mile Run and Danville exits, specifically from mile markers 200 to
216.
This includes Interstate 180 from mile markers 1 to 15.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4099 7710 4106 7706 4114 7710 4125 7680
4117 7672 4117 7673 4107 7674 4105 7676
4100 7678
TIME...MOT...LOC 1914Z 251DEG 31KT 4108 7699
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BanghoffThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 11:48 AM EDT | Special Weather Statement | CTP | Warren | 42 min |
| Sep 15, 1:11 PM EDT | Special Weather Statement | CTP | Sullivan | 49 min |
| Sep 15, 1:27 PM EDT | Special Weather Statement | CTP | Centre | 33 min |
| Sep 15, 1:44 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 31 min |
| Sep 15, 1:48 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 42 min |
| Sep 15, 2:14 PM EDT | Areal Flood Advisory | CTP | Lycoming, Sullivan | 2 hr |
| Sep 15, 2:14 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clinton | 31 min |
| Sep 15, 2:36 PM EDT | Flash Flood Warning | CTP | Lycoming, Sullivan | 66 min |
| Sep 15, 2:45 PM EDT | Special Weather Statement | CTP | Union | 30 min |
| Sep 15, 2:46 PM EDT | Special Weather Statement | CTP | Sullivan | 44 min |
| Sep 15, 3:13 PM EDT | Special Weather Statement | CTP | Union | 17 min |
| Sep 15, 3:20 PM EDT | Severe Thunderstorm Warning | CTP | Juniata, Mifflin | 40 min |
| Sep 15, 3:24 PM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland, Union | 36 min |
| Sep 15, 3:30 PM EDT | Special Weather Statement | CTP | Huntingdon | 30 min |
| Sep 15, 3:55 PM EDT | Special Weather Statement | CTP | Snyder | 35 min |
| Sep 15, 3:59 PM EDT | Special Weather Statement | CTP | Columbia, Montour | 31 min |
| Sep 15, 4:03 PM EDT | Areal Flood Advisory | CTP | Lycoming, Sullivan | 2 hr |
| Sep 15, 4:12 PM EDT | Flash Flood Warning | CTP | Columbia, Lycoming, Sullivan | 3 hr |
| Sep 15, 4:18 PM EDT | Severe Thunderstorm Warning | CTP | Columbia | 27 min |
| Sep 15, 4:27 PM EDT | Special Weather Statement | CTP | Perry | 33 min |
| Sep 15, 4:36 PM EDT | Special Weather Statement | CTP | Columbia, Northumberland | 24 min |
| Sep 15, 4:43 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Perry | 32 min |
| Sep 15, 4:46 PM EDT | Areal Flood Advisory | CTP | Montour, Northumberland | 89 min |
| Sep 15, 4:58 PM EDT | Special Weather Statement | CTP | Northumberland | 32 min |
| Sep 15, 4:59 PM EDT | Special Weather Statement | CTP | Perry | 31 min |
| Sep 15, 5:15 PM EDT | Special Weather Statement | CTP | Perry | 30 min |
| Sep 15, 5:19 PM EDT | Special Weather Statement | CTP | Franklin | 26 min |
| Sep 15, 5:32 PM EDT | Special Weather Statement | CTP | Dauphin | 28 min |
| Sep 15, 5:37 PM EDT | Special Weather Statement | CTP | Schuylkill | 23 min |
| Sep 15, 5:54 PM EDT | Special Weather Statement | CTP | Lebanon | 36 min |
| Sep 15, 6:16 PM EDT | Special Weather Statement | CTP | York | 29 min |
| Sep 15, 6:17 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon, Schuylkill | 43 min |
| Sep 15, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Adams, Franklin | 27 min |
| Sep 15, 6:41 PM EDT | Special Weather Statement | CTP | Dauphin | 34 min |
| Sep 15, 6:54 PM EDT | Special Weather Statement | CTP | Berks | 21 min |
| Sep 15, 7:09 PM EDT | Areal Flood Advisory | CTP | Dauphin, York | 96 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.