Alert archive / Oklahoma / Winter Storm Warnings in 2020
Winter Storm Warning 5, NWS Norman, OK
NWS Norman, OK issued this winter storm warning at Dec 14, 2020, 9:04 PM CST for 13 counties in Oklahoma. It took effect at Dec 15, 2020, 6:00 AM CST. It was in force for 15 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 14, 2020, 9:04 PM CST (03:04 UTC)
- In effect from
- Dec 15, 2020, 6:00 AM CST
- Expired
- Dec 15, 2020, 9:00 PM CST
- In force
- 15 hr
- Issued by
- NWS Norman, OK
Counties Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Kingfisher County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 123 km from the middle of the area, began a volume at 03:05 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
Amarillo Airport, TX (KAMA), launched 00:00Z, 3.1 hours before the alert went out and 259 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
- 1604 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 335 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Norman, OK wrote its last area forecast discussion before this winter storm warning went out at Dec 14, 5:42 PM CST, 3 hours 22 minutes earlier.
Area forecast discussion, Dec 14, 5:42 PM CST, 3 hours 22 minutes before
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</html>Hazardous weather outlook, Dec 14, 12:01 PM CST, 9 hours 3 minutes before
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</html>Nearby
Winter Storm Warnings in Oklahoma, 2020Every winter storm warning in 2020
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.