Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 212, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 12, 2021, 5:46 PM EDT for Clearfield County, Elk County, Pennsylvania. It was in force for 44 min. 5 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
- Aug 12, 2021, 5:46 PM EDT (21:46 UTC)
- Expired
- Aug 12, 2021, 6:30 PM EDT
- In force
- 44 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Clearfield County, PA, Elk County, PA
The radar
The State College radar (KCCX), 67 km from the middle of the area, began a volume at 21:50 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, 6:05 PM EDT | TSTM WND DMG | 1 N Dubois, PA | TREES AND WIRES DOWN. |
| Aug 12, 6:05 PM EDT | TSTM WND DMG | Clear Run, PA | TREES AND WIRES DOWN |
| Aug 12, 6:06 PM EDT | TSTM WND DMG | Treasure Lake, PA | TREES AND WIRES DOWN |
| Aug 12, 6:10 PM EDT | TSTM WND DMG | 1 N Adrian Furnace, PA | TREE ON A VEHICLE |
| Aug 12, 6:10 PM EDT | TSTM WND DMG | 2 Nw Dubois, PA | TREE ON A VEHICLE. |
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, 9.8 hours before the alert went out and 147 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.
202
WUUS51 KCTP 122146
SVRCTP
PAC033-047-122230-
/O.NEW.KCTP.SV.W.0212.210812T2146Z-210812T2230Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
546 PM EDT Thu Aug 12 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
South central Elk County in north central Pennsylvania...
Northwestern Clearfield County in central Pennsylvania...
* Until 630 PM EDT.
* At 544 PM EDT, severe thunderstorms were located along a line
extending from near Reynoldsville to near Brockway, moving east at
20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
DuBois, Sandy, Penfield, Rockton, Force, Parker Dam State Park,
S.B. Elliot State Park, Brockport, Treasure Lake and Penn State
Dubois.
For those driving on Interstate 80, this includes areas between the
Dubois and Clearfield exits, specifically from mile markers 97 to
113.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Hail and damaging winds and continuous cloud to ground lightning is
occurring with these storms. 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 4120 7877 4120 7871 4123 7871 4123 7874
4126 7873 4129 7878 4137 7851 4104 7849
4108 7880 4114 7880
TIME...MOT...LOC 2144Z 257DEG 19KT 4112 7887 4121 7888
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff2 follow-up statements
030
WWUS51 KCTP 122211
SVSCTP
Severe Weather Statement
National Weather Service State College PA
611 PM EDT Thu Aug 12 2021
PAC047-122221-
/O.CAN.KCTP.SV.W.0212.000000T0000Z-210812T2230Z/
Elk PA-
611 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ELK COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central Pennsylvania.
LAT...LON 4120 7876 4120 7871 4121 7866 4122 7850
4104 7849 4107 7873 4108 7880 4115 7880
TIME...MOT...LOC 2211Z 279DEG 19KT 4115 7869
$$
PAC033-122230-
/O.CON.KCTP.SV.W.0212.000000T0000Z-210812T2230Z/
Clearfield PA-
611 PM EDT Thu Aug 12 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR NORTHWESTERN CLEARFIELD COUNTY...
At 611 PM EDT, a severe thunderstorm was located near DuBois, moving
east at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
DuBois, Sandy, Penfield, Rockton, Parker Dam State Park, S.B. Elliot
State Park, Treasure Lake and Penn State Dubois.
For those driving on Interstate 80, this includes areas between the
Dubois and Clearfield exits, specifically from mile markers 97 to
113.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
State College PA.
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 4120 7876 4120 7871 4121 7866 4122 7850
4104 7849 4107 7873 4108 7880 4115 7880
TIME...MOT...LOC 2211Z 279DEG 19KT 4115 7869
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Banghoff834
WWUS51 KCTP 122228
SVSCTP
Severe Weather Statement
National Weather Service State College PA
628 PM EDT Thu Aug 12 2021
PAC033-122236-
/O.EXP.KCTP.SV.W.0212.000000T0000Z-210812T2230Z/
Clearfield PA-
628 PM EDT Thu Aug 12 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLEARFIELD COUNTY
WILL EXPIRE AT 630 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
central Pennsylvania.
Remember, a Severe Thunderstorm Warning still remains in effect for
Clearfield County including Clearfield, Philipsburg, and Woodland
and Interstate 80 between mile markers 106 and 138.
LAT...LON 4120 7876 4120 7871 4121 7866 4122 7850
4104 7849 4107 7873 4108 7880 4115 7880
TIME...MOT...LOC 2226Z 257DEG 19KT 4117 7859
$$
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, 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 |
| Aug 12, 7:56 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 49 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.