Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 215, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 12, 2021, 7:56 PM EDT for Centre County, Clearfield County, Pennsylvania. It was in force for 49 min. 1 report 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
- Aug 12, 2021, 7:56 PM EDT (23:56 UTC)
- Expired
- Aug 12, 2021, 8:45 PM EDT
- In force
- 49 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Centre County, PA, Clearfield County, PA
The radar
The State College radar (KCCX), 6 km from the middle of the area, began a volume at 23:55 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 |
|---|---|---|---|
| Aug 12, 8:26 PM EDT | TSTM WND DMG | 2 Wsw Wingate, PA | TREES AND WIRES DOWN |
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 |
|---|---|---|---|
| Aug 12, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 11.9 hours before the alert went out and 191 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
- 1075 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 163 m²/s²
- 0-3 km storm-relative helicity
- 129 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.8
The text
As transmitted.
906
WUUS51 KCTP 122356
SVRCTP
PAC027-033-130045-
/O.NEW.KCTP.SV.W.0215.210812T2356Z-210813T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
756 PM EDT Thu Aug 12 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
East central Clearfield County in central Pennsylvania...
Central Centre County in central Pennsylvania...
* Until 845 PM EDT.
* At 755 PM EDT, a severe thunderstorm was located over North
Philipsburg, moving east at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Bellefonte, Pleasant Gap, Philipsburg, Woodland, Lamar, Lemont,
Zion, Houserville, Centre Hall, Milesburg, Chester Hill, Snow Shoe,
North Philipsburg, Clarence, South Philipsburg, Moshannon, Spring
Mills, Julian, Bald Eagle State Park and Potters Mills.
For those driving on Interstate 80, this includes areas between the
Woodland and Lamar exits, specifically from mile markers 123 to 170.
This includes Interstate 99 from mile markers 73 to 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
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 4103 7835 4104 7757 4100 7754 4078 7759
4089 7836
TIME...MOT...LOC 2355Z 278DEG 35KT 4094 7820
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff2 follow-up statements
323
WWUS51 KCTP 130019
SVSCTP
Severe Weather Statement
National Weather Service State College PA
819 PM EDT Thu Aug 12 2021
PAC033-130028-
/O.CAN.KCTP.SV.W.0215.000000T0000Z-210813T0045Z/
Clearfield PA-
819 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CLEARFIELD COUNTY
IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central and north central Pennsylvania.
LAT...LON 4083 7794 4104 7790 4104 7757 4100 7754
4078 7759
TIME...MOT...LOC 0018Z 276DEG 45KT 4090 7774
$$
PAC027-130045-
/O.CON.KCTP.SV.W.0215.000000T0000Z-210813T0045Z/
Centre PA-
819 PM EDT Thu Aug 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR CENTRAL CENTRE COUNTY...
At 818 PM EDT, a severe thunderstorm was located over Bellefonte,
moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Bellefonte, Pleasant Gap, Lamar, Lemont, Zion, Houserville, Centre
Hall, Milesburg, Spring Mills, Potters Mills, Bald Eagle State Park,
Howard, Unionville and University Park Airport.
For those driving on Interstate 80, this includes areas between the
Snow Shoe and Lamar exits, specifically from mile markers 149 to 170.
This includes Interstate 99 from mile markers 73 to 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Wind damage with this storm will occur before any rain or lightning.
Do not wait for the sound of thunder before taking cover. SEEK
SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. 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 4083 7794 4104 7790 4104 7757 4100 7754
4078 7759
TIME...MOT...LOC 0018Z 276DEG 45KT 4090 7774
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff736
WWUS51 KCTP 130043
SVSCTP
Severe Weather Statement
National Weather Service State College PA
843 PM EDT Thu Aug 12 2021
PAC027-130053-
/O.EXP.KCTP.SV.W.0215.000000T0000Z-210813T0045Z/
Centre PA-
843 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL CENTRE COUNTY WILL
EXPIRE AT 845 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
central and north central Pennsylvania.
Remember, a Severe Thunderstorm Warning still remains in effect for
eastern Centre County.
LAT...LON 4083 7794 4104 7790 4104 7757 4100 7754
4078 7759
TIME...MOT...LOC 0043Z 278DEG 35KT 4087 7744
$$
BanghoffThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 3:33 AM EDT | Excessive Heat Warning | CTP | Adams, Dauphin, Lancaster, Lebanon, York | 39 hr |
| Aug 12, 3:33 AM EDT | Heat Advisory | CTP | Columbia, Cumberland, Franklin, Fulton, Huntingdon, Juniata and 8 more | 39 hr |
| Aug 12, 12:38 PM EDT | Special Weather Statement | CTP | Tioga | 52 min |
| Aug 12, 12:51 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming, Potter, Tioga | 54 min |
| Aug 12, 1:27 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Sullivan | 63 min |
| Aug 12, 1:43 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 49 min |
| Aug 12, 1:47 PM EDT | Severe Thunderstorm Warning | CTP | Clinton, Lycoming | 58 min |
| Aug 12, 2:15 PM EDT | Special Weather Statement | CTP | Columbia | 30 min |
| Aug 12, 2:25 PM EDT | Special Weather Statement | CTP | Lycoming | 20 min |
| Aug 12, 2:50 PM EDT | Special Weather Statement | CTP | Columbia, Montour | 25 min |
| Aug 12, 3:19 PM EDT | Special Weather Statement | CTP | Schuylkill | 41 min |
| Aug 12, 5:12 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 48 min |
| Aug 12, 5:27 PM EDT | Special Weather Statement | CTP | Tioga | 33 min |
| Aug 12, 5:46 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 44 min |
| Aug 12, 6:25 PM EDT | Areal Flood Advisory | CTP | Clearfield, Elk | 2 hr |
| Aug 12, 6:25 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 65 min |
| Aug 12, 7:07 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield, Elk | 53 min |
| Aug 12, 7:33 PM EDT | Special Weather Statement | CTP | Blair, Cambria | 27 min |
| Aug 12, 7:47 PM EDT | Special Weather Statement | CTP | Centre | 28 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.