Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 287, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Oct 16, 2021, 8:47 AM EDT for 4 counties in Pennsylvania. It was in force for 43 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 16, 2021, 8:47 AM EDT (12:47 UTC)
- Expired
- Oct 16, 2021, 9:30 AM EDT
- In force
- 43 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Cameron County, PA, Elk County, PA, McKean County, PA, Potter County, PA
The radar
The State College radar (KCCX), 90 km from the middle of the area, began a volume at 12:51 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 16, 9:29 AM EDT | TSTM WND DMG | 1 Wsw Genesee, PA | TREES AND WIRES DOWN ACROSS KINNEY ROAD, COMPLETELY BLOCKING THE ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 0.8 hours before the alert went out and 142 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
- 465 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- -52 m²/s²
- 0-3 km storm-relative helicity
- 142 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
989
WUUS51 KCTP 161247
SVRCTP
PAC023-047-083-105-161330-
/O.NEW.KCTP.SV.W.0287.211016T1247Z-211016T1330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service State College PA
847 AM EDT Sat Oct 16 2021
The National Weather Service in State College PA has issued a
* Severe Thunderstorm Warning for...
Northeastern Elk County in north central Pennsylvania...
Southeastern McKean County in north central Pennsylvania...
Potter County in north central Pennsylvania...
Northern Cameron County in north central Pennsylvania...
* Until 930 AM EDT.
* At 846 AM EDT, severe thunderstorms were located along a line
extending from 6 miles west of Betula to near East Branch Dam to 7
miles southwest of Elk River to near St. Marys, moving northeast at
50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Betula and Truman around 850 AM EDT.
Emporium, Crosby, Elk River and Port Allegany around 900 AM EDT.
Roulette, Keating Summit and Sizerville around 910 AM EDT.
Coudersport around 920 AM EDT.
Other locations impacted by these severe thunderstorms include
Austin, Oswayo, Sweden Valley, Ski Denton Ski Area and Ulysses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4192 7775 4186 7777 4182 7777 4163 7769
4136 7853 4147 7858 4152 7858 4157 7856
4168 7861 4200 7800 4200 7779
TIME...MOT...LOC 1246Z 240DEG 45KT 4165 7851 4161 7849 4156 7851 4151
7851 4146 7849
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Jurewicz1 follow-up statement
619
WWUS51 KCTP 161316
SVSCTP
Severe Weather Statement
National Weather Service State College PA
916 AM EDT Sat Oct 16 2021
PAC023-047-083-161325-
/O.CAN.KCTP.SV.W.0287.000000T0000Z-211016T1330Z/
Elk PA-McKean PA-Cameron PA-
916 AM EDT Sat Oct 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ELK...
SOUTHEASTERN MCKEAN AND NORTHERN CAMERON COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4197 7777 4192 7777 4187 7779 4169 7781
4157 7816 4162 7821 4177 7821 4188 7815
4200 7795 4200 7779
TIME...MOT...LOC 1315Z 236DEG 42KT 4184 7814 4180 7816 4173 7816 4168
7818 4165 7818
$$
PAC105-161330-
/O.CON.KCTP.SV.W.0287.000000T0000Z-211016T1330Z/
Potter PA-
916 AM EDT Sat Oct 16 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 AM EDT
FOR NORTHWESTERN POTTER COUNTY...
At 915 AM EDT, severe thunderstorms were located along a line
extending from 7 miles east of Port Allegany to Roulette to 7 miles
west of Coudersport to Keating Summit to near Sizerville, moving
northeast at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
These severe storms will be near...
Coudersport around 930 AM EDT.
Genesee and Denton Hill State Park around 940 AM EDT.
Other locations impacted by these severe thunderstorms include
Austin, Oswayo, Sweden Valley, Ski Denton Ski Area and Ulysses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4197 7777 4192 7777 4187 7779 4169 7781
4157 7816 4162 7821 4177 7821 4188 7815
4200 7795 4200 7779
TIME...MOT...LOC 1315Z 236DEG 42KT 4184 7814 4180 7816 4173 7816 4168
7818 4165 7818
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
JurewiczThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 15, 11:06 PM EDT | Special Weather Statement | CTP | Mifflin | 54 min |
| Oct 16, 8:13 AM EDT | Severe Thunderstorm Warning | CTP | Elk | 47 min |
| Oct 16, 9:28 AM EDT | Special Weather Statement | CTP | Potter | 32 min |
| Oct 16, 10:18 AM EDT | Special Weather Statement | CTP | Centre | 27 min |
| Oct 16, 10:54 AM EDT | Special Weather Statement | CTP | Lycoming | 36 min |
| Oct 16, 11:39 AM EDT | Special Weather Statement | CTP | Sullivan | 36 min |
| Oct 16, 1:27 PM EDT | Special Weather Statement | CTP | Dauphin, Lancaster, Lebanon, Schuylkill | 63 min |
| Oct 16, 2:29 PM EDT | Special Weather Statement | CTP | Lancaster | 31 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.