Alert archive / South Dakota / Frost Advisories in 2022

Frost Advisory 2, NWS Aberdeen, SD

May 21, 20228 counties in South Dakota; Big Stone County, Traverse County, Minnesota

NWS Aberdeen, SD issued this frost advisory at May 21, 2022, 2:17 PM CDT for 8 counties in South Dakota; Big Stone County, Traverse County, Minnesota. It took effect at May 21, 2022, 11:00 PM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
May 21, 2022, 2:17 PM CDT (19:17 UTC)
In effect from
May 21, 2022, 11:00 PM CDT
Expired
May 22, 2022, 9:00 AM CDT
In force
10 hr
Issued by
NWS Aberdeen, SD

Counties Big Stone County, MN, Traverse County, MN, Brown County, SD, Codington County, SD, Day County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Marshall County, SD, Roberts County, SD

The radar

The Aberdeen radar (KABR), 102 km from the middle of the area, began a volume at 19:19 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

Minneapolis, MN (KMPX), launched 12:00Z, 7.3 hours before the alert went out and 281 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, Minneapolis, MN at 12:00Z on 2022-05-21Temperature 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, Minneapolis, MN at 12:00Z on 2022-05-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -60 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
1016 m above ground
0-6 km bulk shear
84 kt
0-1 km storm-relative helicity
-60 m²/s²
0-3 km storm-relative helicity
21 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Aberdeen, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 20, 9:41 PM CDTRiver Flood WarningABRSpink87 days
May 21, 2:17 PM CDTFreeze WarningABRBuffalo, Campbell, Clark, Corson, Dewey, Edmunds and 12 more19 hr

Nearby

Frost Advisories in South Dakota, 2022Frost Advisories in Minnesota, 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.