Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 285, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Oct 15, 2021, 4:12 PM EDT for Warren County, Pennsylvania. It was in force for 32 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
- Oct 15, 2021, 4:12 PM EDT (20:12 UTC)
- Expired
- Oct 15, 2021, 4:44 PM EDT
- In force
- 32 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Warren County, PA
The radar
The Buffalo radar (KBUF), 125 km from the middle of the area, began a volume at 20:12 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
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.2 hours before the alert went out and 123 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
- 2 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 554 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- -28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
756
WUUS51 KCTP 152012
SVRCTP
PAC123-152130-
/O.NEW.KCTP.SV.W.0285.211015T2012Z-211015T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
412 PM EDT Fri Oct 15 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Central Warren County in north central Pennsylvania...
* Until 530 PM EDT.
* At 412 PM EDT, a severe thunderstorm was located near Grand Valley,
moving northeast 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...
Warren, Scandia, Warren South, Kinzua Dam, Chapman State Park,
Starbrick and Clarendon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4195 7891 4184 7892 4183 7892 4183 7895
4176 7895 4174 7896 4168 7949 4175 7952
4200 7894 4200 7892
TIME...MOT...LOC 2012Z 247DEG 17KT 4172 7941
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
KF1 follow-up statement
342
WWUS51 KCTP 152044
SVSCTP
Severe Weather Statement
National Weather Service State College PA
444 PM EDT Fri Oct 15 2021
PAC123-152054-
/O.CAN.KCTP.SV.W.0285.000000T0000Z-211015T2130Z/
Warren PA-
444 PM EDT Fri Oct 15 2021
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WARREN COUNTY IS
CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.
LAT...LON 4195 7891 4184 7892 4183 7892 4183 7895
4176 7895 4174 7896 4168 7949 4175 7952
4200 7894 4200 7892
TIME...MOT...LOC 2044Z 247DEG 17KT 4178 7922
$$
KFThe 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, 12:58 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 47 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 |
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.