Alert archive / South Dakota / Frost Advisories in 2021
Frost Advisory 2, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this frost advisory at May 5, 2021, 2:24 PM CDT for 22 counties in South Dakota; 7 counties in Minnesota; Lyon County, Iowa. It took effect at May 6, 2021, 3:00 AM CDT. It was in force for 5 hr.
The area
The counties it named.
The facts
- Issued
- May 5, 2021, 2:24 PM CDT (19:24 UTC)
- In effect from
- May 6, 2021, 3:00 AM CDT
- Expired
- May 6, 2021, 8:00 AM CDT
- In force
- 5 hr
- Issued by
- NWS Sioux Falls, SD
All 30 counties
Lyon County, IA, Cottonwood County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 50 km from the middle of the area, began a volume at 19:26 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
Aberdeen, SD (KABR), launched 12:00Z, 7.4 hours before the alert went out and 154 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1958 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 195 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
643 WWUS73 KFSD 051924 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 224 PM CDT Wed May 5 2021 IAZ001-MNZ071-072-080-081-089-097-098-SDZ038>040-050-052>069- 060330- /O.NEW.KFSD.FR.Y.0002.210506T0800Z-210506T1300Z/ Lyon-Lincoln-Murray-Cottonwood-Nobles-Pipestone-Rock-Beadle- Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner-Lake-Moody- Brule-Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton- 224 PM CDT Wed May 5 2021 ...FROST ADVISORY IN EFFECT FROM 3 AM TO 8 AM CDT THURSDAY... * WHAT...Temperatures in the mid to lower 30s will result in frost formation. * WHERE...Portions of central, east central, south central and southeast South Dakota, northwest Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation and the Flandreau Santee Sioux Tribal Nation. * WHEN...From 3 AM to 8 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
2 follow-up statements
316 WWUS73 KFSD 060251 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 951 PM CDT Wed May 5 2021 IAZ001-MNZ071-072-080-081-089-097-098-SDZ038>040-050-052>069- 061300- /O.CON.KFSD.FR.Y.0002.210506T0800Z-210506T1300Z/ Lyon-Lincoln-Murray-Cottonwood-Nobles-Pipestone-Rock-Beadle- Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner-Lake-Moody- Brule-Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton- 951 PM CDT Wed May 5 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 3 AM TO 8 AM CDT THURSDAY... * WHAT...Temperatures in the lower to mid 30s will result in frost formation. * WHERE...Portions of central, east central, south central and southeast South Dakota, northwest Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation and the Flandreau Santee Sioux Tribal Nation. * WHEN...From 3 AM to 8 AM CDT Thursday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
921 WWUS73 KFSD 061259 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 759 AM CDT Thu May 6 2021 IAZ001-MNZ071-072-080-081-089-097-098-SDZ038>040-050-052>069- 061400- /O.EXP.KFSD.FR.Y.0002.000000T0000Z-210506T1300Z/ Lyon-Lincoln-Murray-Cottonwood-Nobles-Pipestone-Rock-Beadle- Kingsbury-Brookings-Gregory-Jerauld-Sanborn-Miner-Lake-Moody- Brule-Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton- 759 AM CDT Thu May 6 2021 ...FROST ADVISORY WILL EXPIRE AT 8 AM CDT THIS MORNING... Temperatures will continue to warm through the morning hours, therefore the Frost Advisory will be allowed to expire as scheduled. $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
Nearby
Frost Advisories in South Dakota, 2021Frost Advisories in Minnesota, 2021Frost Advisories in Iowa, 2021Every frost advisory 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.