Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 260, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Aug 29, 2021, 5:00 PM EDT for Clearfield County, Pennsylvania. It was in force for 45 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
- Aug 29, 2021, 5:00 PM EDT (21:00 UTC)
- Expired
- Aug 29, 2021, 5:45 PM EDT
- In force
- 45 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Clearfield County, PA
The radar
The State College radar (KCCX), 24 km from the middle of the area, began a volume at 21:00 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 nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 9.0 hours before the alert went out and 164 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
- 985 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 957 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 42 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
339
WUUS51 KCTP 292100
SVRCTP
PAC033-292145-
/O.NEW.KCTP.SV.W.0260.210829T2100Z-210829T2145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
500 PM EDT Sun Aug 29 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Central Clearfield County in central Pennsylvania...
* Until 545 PM EDT.
* At 500 PM EDT, a severe thunderstorm was located near Hyde, moving
southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Clearfield, Philipsburg, Woodland, Curwensville, Hyde, Osceola
Mills, Plymptonville, Rockton, Chester Hill, Jeffries, Morrisdale,
West Decatur, Grassflat, Kylertown, Wallaceton and
Clearfield-Lawrence Airport.
For those driving on Interstate 80, this includes areas between the
Dubois Route 255 and Snow Shoe exits, specifically between mile
markers 106 and 107...and from mile markers 110 to 137.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4113 7861 4101 7806 4094 7812 4096 7817
4095 7816 4092 7818 4091 7822 4088 7823
4088 7825 4087 7824 4086 7825 4085 7829
4083 7830 4104 7871
TIME...MOT...LOC 2100Z 293DEG 23KT 4104 7854
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KF2 follow-up statements
387
WWUS51 KCTP 292129
SVSCTP
Severe Weather Statement
National Weather Service State College PA
529 PM EDT Sun Aug 29 2021
PAC033-292145-
/O.CON.KCTP.SV.W.0260.000000T0000Z-210829T2145Z/
Clearfield PA-
529 PM EDT Sun Aug 29 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR SOUTHEASTERN CLEARFIELD COUNTY...
At 529 PM EDT, a severe thunderstorm was located over Jeffries,
moving southeast at 25 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Philipsburg, Osceola Mills, Chester Hill, Jeffries, Morrisdale, West
Decatur and Wallaceton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4092 7848 4100 7841 4094 7817 4092 7818
4091 7822 4088 7823 4088 7825 4087 7824
4086 7825 4085 7829 4083 7830
TIME...MOT...LOC 2129Z 303DEG 22KT 4091 7835
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KF316
WWUS51 KCTP 292140
SVSCTP
Severe Weather Statement
National Weather Service State College PA
540 PM EDT Sun Aug 29 2021
PAC033-292149-
/O.EXP.KCTP.SV.W.0260.000000T0000Z-210829T2145Z/
Clearfield PA-
540 PM EDT Sun Aug 29 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLEARFIELD COUNTY
WILL EXPIRE AT 545 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.
LAT...LON 4092 7848 4100 7841 4094 7817 4092 7818
4091 7822 4088 7823 4088 7825 4087 7824
4086 7825 4085 7829 4083 7830
TIME...MOT...LOC 2139Z 293DEG 23KT 4089 7829
$$
KFThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 4:24 PM EDT | Special Weather Statement | CTP | Clearfield | 21 min |
| Aug 29, 4:45 PM EDT | Special Weather Statement | CTP | Clearfield | 15 min |
| Aug 29, 6:02 PM EDT | Areal Flood Advisory | CTP | Somerset | 58 min |
| Aug 29, 6:36 PM EDT | Special Weather Statement | CTP | Cambria | 24 min |
| Aug 29, 6:50 PM EDT | Special Weather Statement | CTP | Clearfield | 25 min |
| Aug 29, 7:26 PM EDT | Special Weather Statement | CTP | Somerset | 19 min |
| Aug 29, 7:45 PM EDT | Special Weather Statement | CTP | Somerset | 15 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.