Alert archive / Pennsylvania / Snow Squall Warnings in 2021
Snow Squall Warning 5, NWS State College, PA
NWS State College, PA issued this snow squall warning at Feb 22, 2021, 8:28 AM EST for Adams County, Lancaster County, York County, Pennsylvania. It was in force for 47 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
- Feb 22, 2021, 8:28 AM EST (13:28 UTC)
- Expired
- Feb 22, 2021, 9:15 AM EST
- In force
- 47 min
- Issued by
- NWS State College, PA
- Area
- Storm-based polygon
Counties Adams County, PA, Lancaster County, PA, York County, PA
The radar
The Sterling radar (KLWX), 147 km from the middle of the area, began a volume at 13:27 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
Washington/Dulle, VA (KIAD), launched 12:00Z, 1.5 hours before the alert went out and 145 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
- 1420 m above ground
- 0-6 km bulk shear
- 91 kt
- 0-1 km storm-relative helicity
- 461 m²/s²
- 0-3 km storm-relative helicity
- 475 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
627
WWUS51 KCTP 221330
SQWCTP
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Snow Squall Warning
National Weather Service State College PA
828 AM EST Mon Feb 22 2021
PAC001-071-133-221415-
/O.NEW.KCTP.SQ.W.0005.210222T1328Z-210222T1415Z/
Lancaster PA-Adams PA-York PA-
828 AM EST Mon Feb 22 2021
The National Weather Service in State College PA has issued a
* Snow Squall Warning for...
Lancaster County in south central Pennsylvania...
Southeastern Adams County in south central Pennsylvania...
York County in south central Pennsylvania...
* Until 915 AM EST.
* At 828 AM EST, a dangerous snow squall was located along the
leading edge of an area of heavy snow extending from near Dover to
near Littlestown, moving east at 40 mph.
HAZARD...Extremely poor visibility in heavy snow and blowing snow.
Possible flash freezes.
SOURCE...Radar indicated.
IMPACT...Dangerous life-threatening travel.
* This includes the following Interstates...
The Pennsylvania Turnpike from mile markers 286 to 295.
Interstate 83 from mile markers 0 to 34.
Locations impacted include...
Lancaster, York, Hanover, Ephrata, Weigelstown, Elizabethtown,
Columbia, Lititz, Millersville, Willow Street, Mount Joy, Parkville,
Red Lion, New Holland, Spry, Manheim, East Petersburg, Dallastown,
Akron and Shiloh.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Consider avoiding or delaying travel until the snow squall passes
your location. If you must travel, use extra caution and allow extra
time. Rapid changes in visibility and slick road conditions may lead
to accidents.
&&
LAT...LON 4014 7696 4016 7675 4012 7672 4016 7670
4015 7668 4017 7663 4023 7601 4017 7593
4000 7596 3996 7599 3987 7599 3973 7610
3974 7611 3972 7614 3972 7705
TIME...MOT...LOC 1328Z 271DEG 36KT 4007 7692 3970 7699
$$
DeVoir/GusemanThe office that day
Everything else NWS State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 22, 8:15 AM EST | Snow Squall Warning | CTP | Columbia, Cumberland, Dauphin, Lancaster, Lebanon, Lycoming and 9 more | 90 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.