Alert archive / Wyoming / Frost Advisories in 2022

Frost Advisory 1, NWS Cheyenne, WY

May 23, 2022Converse County, Niobrara County, Wyoming; Dawes County, Sioux County, Nebraska

NWS Cheyenne, WY issued this frost advisory at May 23, 2022, 1:53 PM MDT for Converse County, Niobrara County, Wyoming; Dawes County, Sioux County, Nebraska. It took effect at May 24, 2022, 12:00 AM MDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
May 23, 2022, 1:53 PM MDT (19:53 UTC)
In effect from
May 24, 2022, 12:00 AM MDT
Expired
May 24, 2022, 8:00 AM MDT
In force
8 hr
Issued by
NWS Cheyenne, WY

Counties Dawes County, NE, Sioux County, NE, Converse County, WY, Niobrara County, WY

The radar

The Rapid City radar (KUDX), 184 km from the middle of the area, began a volume at 19:56 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

Denver, CO (KDNR), launched 12:00Z, 7.9 hours before the alert went out and 337 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, Denver, CO at 12:00Z on 2022-05-23Temperature 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 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2022-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 62 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1004 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
62 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 23, 2:22 AM MDTDense Fog AdvisoryCYSAlbany, Laramie7 hr

Nearby

Frost Advisories in Wyoming, 2022Frost Advisories in Nebraska, 2022Every frost advisory in 2022

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.