Alert archive / Pennsylvania / Winter Weather Advisories in 2021
Winter Weather Advisory 22, NWS State College, PA
NWS State College, PA issued this winter weather advisory at Nov 18, 2021, 3:29 AM EST for McKean County, Warren County, Pennsylvania. It took effect at Nov 18, 2021, 9:00 PM EST. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Nov 18, 2021, 3:29 AM EST (08:29 UTC)
- In effect from
- Nov 18, 2021, 9:00 PM EST
- Expired
- Nov 19, 2021, 10:08 AM EST
- In force
- 13 hr
- Issued by
- NWS State College, PA
Counties McKean County, PA, Warren County, PA
The radar
The State College radar (KCCX), 125 km from the middle of the area, began a volume at 08:34 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 00:00Z, 8.5 hours before the alert went out and 126 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
- 940 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 300 m²/s²
- 0-3 km storm-relative helicity
- 285 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Winter Weather Advisories in Pennsylvania, 2021Every winter weather advisory 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.