Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 284, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Oct 15, 2021, 12:58 PM EDT for Centre County, Clearfield County, Pennsylvania. It was in force for 47 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
- Oct 15, 2021, 12:58 PM EDT (16:58 UTC)
- Expired
- Oct 15, 2021, 1:45 PM EDT
- In force
- 47 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Centre County, PA, Clearfield County, PA
The radar
The State College radar (KCCX), 27 km from the middle of the area, began a volume at 16:59 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 |
|---|---|---|---|
| Oct 15, 12:58 PM EDT | TSTM WND DMG | 1 Sw Curwensville, PA | TREE DOWN. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 5.0 hours before the alert went out and 161 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
- 685 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 658 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
079
WUUS51 KCTP 151658
SVRCTP
PAC027-033-151745-
/O.NEW.KCTP.SV.W.0284.211015T1658Z-211015T1745Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
1258 PM EDT Fri Oct 15 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Central Clearfield County in central Pennsylvania...
Southwestern Centre County in central Pennsylvania...
* Until 145 PM EDT.
* At 1258 PM EDT, a severe thunderstorm was located near
Curwensville, moving east at 30 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...
Clearfield, Philipsburg, Woodland, Curwensville, Hyde, Osceola
Mills, Plymptonville, Chester Hill, North Philipsburg, South
Philipsburg, Moshannon, Black Moshannon State Park, Jeffries,
Morrisdale, West Decatur, Grassflat, Kylertown and Wallaceton.
For those driving on Interstate 80, this includes areas between the
Clearfield and Snow Shoe exits, specifically from mile markers 120 to
143.
This includes Interstate 99 near mile marker 64.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4088 7855 4103 7852 4107 7798 4081 7801
TIME...MOT...LOC 1658Z 269DEG 24KT 4095 7845
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JCG1 follow-up statement
985
WWUS51 KCTP 151720
SVSCTP
Severe Weather Statement
National Weather Service State College PA
120 PM EDT Fri Oct 15 2021
PAC027-033-151745-
/O.CON.KCTP.SV.W.0284.000000T0000Z-211015T1745Z/
Clearfield PA-Centre PA-
120 PM EDT Fri Oct 15 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR EAST CENTRAL CLEARFIELD AND SOUTHWESTERN CENTRE COUNTIES...
At 119 PM EDT, a severe thunderstorm was located near North
Philipsburg, moving east at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Philipsburg, Woodland, Osceola Mills, Chester Hill, North
Philipsburg, South Philipsburg, Moshannon, Black Moshannon State
Park, Morrisdale, West Decatur, Grassflat, Kylertown and Wallaceton.
For those driving on Interstate 80, this includes areas between the
Woodland and Snow Shoe exits, specifically from mile markers 123 to
143.
This includes Interstate 99 near mile marker 64.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4090 7837 4104 7835 4107 7798 4081 7801
4085 7829
TIME...MOT...LOC 1719Z 269DEG 24KT 4095 7826
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JCGThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 15, 12:02 PM EDT | Special Weather Statement | CTP | Clearfield | 28 min |
| Oct 15, 12:17 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 43 min |
| Oct 15, 1:45 PM EDT | Special Weather Statement | CTP | Centre | 30 min |
| Oct 15, 3:33 PM EDT | Special Weather Statement | CTP | Warren | 27 min |
| Oct 15, 4:09 PM EDT | Special Weather Statement | CTP | Warren | 21 min |
| Oct 15, 4:12 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 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.