Alert archive / South Dakota / Frost Advisories in 2022

Frost Advisory 3, NWS Aberdeen, SD

September 21, 20227 counties in South Dakota

NWS Aberdeen, SD issued this frost advisory at Sep 21, 2022, 2:26 PM CDT for 7 counties in South Dakota. It took effect at Sep 22, 2022, 3:00 AM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Sep 21, 2022, 2:26 PM CDT (19:26 UTC)
In effect from
Sep 22, 2022, 3:00 AM CDT
Expired
Sep 22, 2022, 10:00 AM CDT
In force
7 hr
Issued by
NWS Aberdeen, SD

Counties Brown County, SD, Campbell County, SD, Corson County, SD, Edmunds County, SD, Marshall County, SD, McPherson County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 78 km from the middle of the area, began a volume at 19:27 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

Bismarck Municip, ND (KBIS), launched 12:00Z, 7.4 hours before the alert went out and 162 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, Bismarck Municip, ND at 12:00Z on 2022-09-21Temperature 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, Bismarck Municip, ND at 12:00Z on 2022-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -122 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
1181 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
-122 m²/s²
0-3 km storm-relative helicity
-24 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
Sep 21, 2:26 PM CDTWind AdvisoryABRCorson, Dewey27 hr

Nearby

Frost Advisories in South Dakota, 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.