Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 288, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Oct 21, 2021, 9:39 PM EDT for Centre County, Clearfield County, Pennsylvania. It was in force for 36 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 21, 2021, 9:39 PM EDT (01:39 UTC)
- Expired
- Oct 21, 2021, 10:15 PM EDT
- In force
- 36 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Centre County, PA, Clearfield County, PA
The radar
The State College radar (KCCX), 34 km from the middle of the area, began a volume at 01:39 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 21, 9:50 PM EDT | TSTM WND DMG | 3 N Brisbin, PA | TREE DOWN AT RED SCHOOLHOUSE RD AND ROSE LN. |
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 00:00Z, 1.7 hours before the alert went out and 153 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 773 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -217 m²/s²
- 0-3 km storm-relative helicity
- -146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
913
WUUS51 KCTP 220139
SVRCTP
PAC027-033-220215-
/O.NEW.KCTP.SV.W.0288.211022T0139Z-211022T0215Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
939 PM EDT Thu Oct 21 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
South central Clearfield County in central Pennsylvania...
Southwestern Centre County in central Pennsylvania...
* Until 1015 PM EDT.
* At 939 PM EDT, a severe thunderstorm was located near Houtzdale,
moving east at 50 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, Houtzdale, North
Philipsburg, Port Matilda, South Philipsburg, Sandy Ridge,
Jeffries, Irvona, Coalport, Ramey, Brisbin and Glen Hope.
This includes Interstate 99 from mile markers 56 to 62.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4087 7859 4093 7809 4071 7802 4074 7813
4074 7824 4073 7836 4072 7860 4076 7864
TIME...MOT...LOC 0139Z 257DEG 42KT 4080 7847
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Colbert1 follow-up statement
057
WWUS51 KCTP 220209
SVSCTP
Severe Weather Statement
National Weather Service State College PA
1009 PM EDT Thu Oct 21 2021
PAC033-220218-
/O.CAN.KCTP.SV.W.0288.000000T0000Z-211022T0215Z/
Clearfield PA-
1009 PM EDT Thu Oct 21 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL CLEARFIELD
COUNTY IS CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
LAT...LON 4087 7825 4087 7824 4088 7825 4088 7823
4091 7822 4093 7809 4081 7805 4079 7821
4085 7826
TIME...MOT...LOC 0208Z 257DEG 42KT 4088 7803
$$
PAC027-220215-
/O.CON.KCTP.SV.W.0288.000000T0000Z-211022T0215Z/
Centre PA-
1009 PM EDT Thu Oct 21 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT
FOR SOUTHWESTERN CENTRE COUNTY...
At 1008 PM EDT, a severe thunderstorm was located over Black
Moshannon State Park, moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Philipsburg, Chester Hill, North Philipsburg, South Philipsburg and
Sandy Ridge.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4087 7825 4087 7824 4088 7825 4088 7823
4091 7822 4093 7809 4081 7805 4079 7821
4085 7826
TIME...MOT...LOC 0208Z 257DEG 42KT 4088 7803
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
ColbertThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 21, 9:13 PM EDT | Special Weather Statement | CTP | Cambria | 47 min |
| Oct 21, 9:33 PM EDT | Special Weather Statement | CTP | Blair, Cambria | 42 min |
| Oct 21, 9:52 PM EDT | Severe Thunderstorm Warning | CTP | Blair | 38 min |
| Oct 21, 10:45 PM EDT | Special Weather Statement | CTP | Huntingdon, Juniata, Mifflin | 30 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.