Alert archive / Texas / Freeze Warnings in 2023

Freeze Warning 2, NWS Amarillo, TX

April 20, 2023Dallam County, Hartley County, Sherman County, Texas; Cimarron County, Texas County, Oklahoma

NWS Amarillo, TX issued this freeze warning at Apr 20, 2023, 2:42 PM CDT for Dallam County, Hartley County, Sherman County, Texas; Cimarron County, Texas County, Oklahoma. It took effect at Apr 21, 2023, 3:00 AM CDT. It was in force for 6 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
Apr 20, 2023, 2:42 PM CDT (19:42 UTC)
In effect from
Apr 21, 2023, 3:00 AM CDT
Expired
Apr 21, 2023, 9:00 AM CDT
In force
6 hr
Issued by
NWS Amarillo, TX

Counties Cimarron County, OK, Texas County, OK, Dallam County, TX, Hartley County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 135 km from the middle of the area, began a volume at 19:45 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

Albuquerq/Krtlnd, NM (KABQ), launched 12:00Z, 7.7 hours before the alert went out and 422 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, Albuquerq/Krtlnd, NM at 12:00Z on 2023-04-20Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albuquerq/Krtlnd, NM at 12:00Z on 2023-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -128 square meters per square second.1939587897117Sfc1 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
2842 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
-128 m²/s²
0-3 km storm-relative helicity
191 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this freeze warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Amarillo, TX wrote its last area forecast discussion before this freeze warning went out at Apr 20, 12:20 PM CDT, 2 hours 22 minutes earlier.

Area forecast discussion, Apr 20, 12:20 PM CDT, 2 hours 22 minutes before
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Hazardous weather outlook, Apr 20, 4:05 AM CDT, 10 hours 37 minutes before
Hazardous Weather Outlook
National Weather Service Amarillo TX
405 AM CDT Thu Apr 20 2023

OKZ001>003-TXZ001>020-317-202115-
Cimarron-Texas-Beaver-Dallam-Sherman-Hansford-Ochiltree-Lipscomb-
Hartley-Moore-Hutchinson-Roberts-Hemphill-Oldham-Potter-Carson-
Gray-Wheeler-Deaf Smith-Randall-Armstrong-Donley-Collingsworth-
Palo Duro Canyon-
405 AM CDT Thu Apr 20 2023

This Hazardous Weather Outlook is for the Texas and Oklahoma
Panhandles.

.DAY ONE...Today and Tonight.

Breezy to windy conditions in the eastern Panhandles with the cold
front early this morning. Some blowing dust will be accompanying
those winds. A Wind Advisory is in effect through 5 AM for the
eastern Panhandles.

Critical Fire Weather will be in play today across the southwest
Panhandles, with other areas across the north and west being
elevated to low end critical from breezy winds and low relative
humidity values.

Freezing temperatures may occur in the northwestern Texas and
western Oklahoma Panhandles tonight into early Friday morning.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Monday and Tuesday may have thunderstorms. At this time the
threat for severe weather is low, but can't be ruled out.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated at this time.

The office that day

Everything else NWS Amarillo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 20, 12:37 AM CDTWind AdvisoryAMAArmstrong, Carson, Collingsworth, Donley, Gray, Hansford and 6 more4 hr
Apr 20, 1:26 AM CDTBlowing Dust AdvisoryAMAArmstrong, Carson, Collingsworth, Donley, Gray, Hansford and 10 more4 hr
Apr 20, 3:20 AM CDTFreeze WatchAMADallam, Hartley, Sherman11 hr
Apr 20, 4:05 AM CDTRed Flag WarningAMADallam, Deaf Smith, Hansford, Hartley, Hutchinson, Moore and 5 more18 hr
Apr 20, 12:52 AM CDTHigh Wind WarningAMABeaver, Texas4 hr

Nearby

Freeze Warnings in Texas, 2023Freeze Warnings in Oklahoma, 2023Every freeze warning in 2023

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.