Alert archive / Kansas / Freeze Watches in 2021

Freeze Watch 1, NWS Goodland, KS

October 20, 2021Cheyenne County, Decatur County, Rawlins County, Kansas; Yuma County, Colorado; Dundy County, Hitchcock County, Red Willow County, Nebraska

NWS Goodland, KS issued this freeze watch at Oct 20, 2021, 3:54 AM CDT for Cheyenne County, Decatur County, Rawlins County, Kansas; Yuma County, Colorado; Dundy County, Hitchcock County, Red Willow County, Nebraska. It took effect at Oct 21, 2021, 4:00 AM CDT. It was in force for .

The area

The counties it named.

The facts

Issued
Oct 20, 2021, 3:54 AM CDT (08:54 UTC)
In effect from
Oct 21, 2021, 4:00 AM CDT
Expired
Oct 20, 2021, 3:28 PM CDT
In force
Issued by
NWS Goodland, KS

Counties Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Rawlins County, KS, Dundy County, NE, Hitchcock County, NE, Red Willow County, NE

The radar

The Goodland radar (KGLD), 78 km from the middle of the area, began a volume at 08:54 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

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 8.9 hours before the alert went out and 139 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, N. Platte/Lee Bi, NE at 00:00Z on 2021-10-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 116 joules per kilogram.LCLLFCEL10008507005003002001001 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, N. Platte/Lee Bi, NE at 00:00Z on 2021-10-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 29 square meters per square second.19395878Sfc1 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
116 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
1615 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
29 m²/s²
0-3 km storm-relative helicity
221 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 watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Goodland, KS wrote its last area forecast discussion before this freeze watch went out at Oct 20, 3:47 AM CDT, 7 minutes earlier.

Area forecast discussion, Oct 20, 3:47 AM CDT, 7 minutes before
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Hazardous weather outlook, Oct 19, 10:50 PM CDT, 5 hours 4 minutes before
Hazardous Weather Outlook
National Weather Service Goodland KS
950 PM MDT Tue Oct 19 2021

COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-210400-
Yuma-Kit Carson-Cheyenne-Rawlins-Decatur-Norton-Sherman-Thomas-
Sheridan-Graham-Wallace-Logan-Gove-Greeley-Wichita-Dundy-Hitchcock-
Red Willow-
950 PM MDT Tue Oct 19 2021 /1050 PM CDT Tue Oct 19 2021/

This hazardous weather outlook is for extreme southwest Nebraska...
northwest Kansas and east central Colorado.

.DAY ONE...TODAY...

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH TUESDAY...

Elevated fire weather conditions are possible Thursday afternoon and
Friday afternoon west of a line from Benkelman to Burlington and Kit
Carson.

Elevated to near critical fire weather conditions are possible
Monday afternoon across far eastern Colorado and along and west of
Kansas Highway 27 Tuesday afternoon.

The next best chance for frost and freezing temperatures across the
Tri-State area will be Wednesday night through Thursday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected today or tonight.

The office that day

Everything else NWS Goodland, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 20, 3:54 AM CDTFrost AdvisoryGLDCheyenne, Decatur, Gove, Graham, Logan, Norton and 6 more29 hr

Nearby

Freeze Watches in Kansas, 2021Freeze Watches in Nebraska, 2021Freeze Watches in Colorado, 2021Every freeze watch 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.