Alert archive / Pennsylvania / Snow Squall Warnings in 2021
Snow Squall Warning 1, NWS State College, PA
NWS State College, PA issued this snow squall warning at Jan 22, 2021, 11:42 AM EST for Potter County, Pennsylvania. It was in force for 48 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
- Jan 22, 2021, 11:42 AM EST (16:42 UTC)
- Expired
- Jan 22, 2021, 12:30 PM EST
- In force
- 48 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
County Potter County, PA
The radar
The State College radar (KCCX), 96 km from the middle of the area, began a volume at 16:43 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, 4.7 hours before the alert went out and 143 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
- 919 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 76 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
342
WWUS51 KCTP 221644
SQWCTP
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service State College PA
1142 AM EST Fri Jan 22 2021
PAC105-221730-
/O.NEW.KCTP.SQ.W.0001.210122T1642Z-210122T1730Z/
Potter PA-
1142 AM EST Fri Jan 22 2021
The National Weather Service in State College PA has issued a
* Snow Squall Warning for...
Central Potter County in north central Pennsylvania...
* Until 1230 PM EST.
* At 1142 AM EST, a dangerous snow squall was located over
Coudersport, moving east at 25 mph.
HAZARD...Extremely poor visibility in snow and blowing snow. Wind
gusts up to 30 mph.
SOURCE...Radar indicated.
IMPACT...Expect hazardous road conditions.
The snow squall will move along parallel to Route 6 from Coudersport
to Denton Hill State Park. Near whiteout conditions and rapidly
deteriorating road conditions will occur as it crosses the region.
Consider delaying travel until the squall passes.
Locations impacted include...
Coudersport, Roulette, Galeton, Denton Hill State Park, Lyman Run
State Park, Sweden Valley and Ski Denton Ski Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Reduce your speed and turn on headlights! During snow squalls, the
visibility may suddenly drop to near zero in whiteout conditions.
&&
LAT...LON 4182 7761 4167 7760 4173 7806 4177 7821
4182 7821 4188 7809
TIME...MOT...LOC 1642Z 284DEG 21KT 4180 7801
$$
DeVoirThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 22, 9:51 AM EST | Special Weather Statement | CTP | Elk, McKean | 54 min |
| Jan 22, 11:54 AM EST | Special Weather Statement | CTP | Cameron | 66 min |
| Jan 22, 12:46 PM EST | Snow Squall Warning | CTP | Lycoming, Potter, Tioga | 44 min |
| Jan 22, 1:43 PM EST | Snow Squall Warning | CTP | Columbia, Lycoming, Sullivan, Tioga | 77 min |
| Jan 22, 1:48 PM EST | Special Weather Statement | CTP | Clinton | 57 min |
| Jan 22, 4:00 PM EST | Special Weather Statement | CTP | Sullivan | 30 min |
Nearby
Snow Squall Warnings in Pennsylvania, 2021Every snow squall 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.