Alert archive / Oklahoma / Freeze Warnings in 2020

Freeze Warning 4, NWS Norman, OK

October 23, 202025 counties in Oklahoma; Hardeman County, Texas

NWS Norman, OK issued this freeze warning at Oct 23, 2020, 4:19 AM CDT for 25 counties in Oklahoma; Hardeman County, Texas. It took effect at Oct 24, 2020, 1:00 AM CDT. It was in force for 8 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
Oct 23, 2020, 4:19 AM CDT (09:19 UTC)
In effect from
Oct 24, 2020, 1:00 AM CDT
Expired
Oct 24, 2020, 9:00 AM CDT
In force
8 hr
Issued by
NWS Norman, OK
All 26 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Noble County, OK, Payne County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Hardeman County, TX

The radar

The Vance AFB radar (KVNX), 113 km from the middle of the area, began a volume at 09:21 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

Dodge City, (KDDC), launched 00:00Z, 9.3 hours before the alert went out and 242 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.

Skew-T log-pSkew-T log-p diagram, Dodge City, at 00:00Z on 2020-10-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 00:00Z on 2020-10-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 411 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
797 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
411 m²/s²
0-3 km storm-relative helicity
691 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 23, 1:27 AM CDTSpecial Weather StatementOUNJackson, Kiowa63 min
Oct 23, 3:14 AM CDTSpecial Weather StatementOUNComanche, Cotton61 min
Oct 23, 4:19 AM CDTFreeze WatchOUNBeckham, Blaine, Caddo, Canadian, Cleveland, Comanche and 21 more9 hr
Oct 23, 4:35 AM CDTSpecial Weather StatementOUNLove55 min
Oct 23, 1:35 PM CDTFrost AdvisoryOUNCleveland, Comanche, Grady, Lincoln, McClain, Oklahoma and 1 more19 hr
Oct 22, 8:35 PM CDTSpecial Weather StatementOUNKnox25 min
Oct 22, 9:02 PM CDTSpecial Weather StatementOUNBaylor28 min
Oct 22, 10:14 PM CDTSpecial Weather StatementOUNWichita31 min
Oct 22, 10:45 PM CDTSpecial Weather StatementOUNClay30 min
Oct 22, 10:53 PM CDTSpecial Weather StatementOUNArcher, Clay37 min
Oct 22, 11:30 PM CDTSpecial Weather StatementOUNArcher, Clay60 min
Oct 23, 12:35 AM CDTSpecial Weather StatementOUNMontague40 min

Nearby

Freeze Warnings in Oklahoma, 2020Freeze Warnings in Texas, 2020Every freeze 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.