Alert archive / South Dakota / Frost Advisories in 2021
Frost Advisory 7, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this frost advisory at Oct 15, 2021, 3:30 AM CDT for 4 states. It took effect at Oct 16, 2021, 2:00 AM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Oct 15, 2021, 3:30 AM CDT (08:30 UTC)
- In effect from
- Oct 16, 2021, 2:00 AM CDT
- Expired
- Oct 16, 2021, 9:39 AM CDT
- In force
- 8 hr
- Issued by
- NWS Sioux Falls, SD
All 45 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Ida County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Dakota County, NE, Dixon County, NE, Aurora County, SD, Beadle County, SD, Bon Homme County, SD, Brookings County, SD, Brule County, SD, Charles Mix County, SD, Clay 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, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 16 km from the middle of the area, began a volume at 08:28 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 00:00Z, 8.5 hours before the alert went out and 202 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
- 13 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1600 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- -33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
824 WWUS73 KFSD 150830 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 330 AM CDT Fri Oct 15 2021 IAZ001>003-012>014-020>022-031-032-MNZ071-080-089-090-097-098- NEZ013-014-SDZ038>040-050-052>071-151700- /O.NEW.KFSD.FR.Y.0007.211016T0700Z-211016T1500Z/ Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Nobles-Jackson-Pipestone- Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory-Jerauld- Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton- Union- 330 AM CDT Fri Oct 15 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Temperatures as low as 32 degrees will result in frost formation. * WHERE...Portions of central, east central, south central and southeast South Dakota, northeast Nebraska, northwest and west central Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation and the Flandreau Santee Sioux Tribal Nation. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
5 follow-up statements
462 WWUS73 KFSD 151636 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 1136 AM CDT Fri Oct 15 2021 MNZ072-081-160045- /O.EXA.KFSD.FR.Y.0007.211016T0700Z-211016T1500Z/ Lyon-Cottonwood- 1136 AM CDT Fri Oct 15 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Temperatures as low as 34 will result in frost formation. * WHERE...Lyon and Cottonwood Counties. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ IAZ001>003-012>014-020>022-031-032-MNZ071-080-089-090-097-098- NEZ013-014-SDZ038>040-050-052>071-160045- /O.CON.KFSD.FR.Y.0007.211016T0700Z-211016T1500Z/ Lyon-Osceola-Dickinson-Sioux-O'Brien-Clay-Plymouth-Cherokee- Buena Vista-Woodbury-Ida-Lincoln-Murray-Nobles-Jackson-Pipestone- Rock-Dixon-Dakota-Beadle-Kingsbury-Brookings-Gregory-Jerauld- Sanborn-Miner-Lake-Moody-Brule-Aurora-Davison-Hanson-McCook- Minnehaha-Charles Mix-Douglas-Hutchinson-Turner-Bon Homme-Yankton- Union- 1136 AM CDT Fri Oct 15 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Temperatures as low as 31 will result in frost formation. * WHERE...Portions of central, east central, south central and southeast South Dakota, northeast Nebraska, northwest and west central Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation and the Flandreau Santee Sioux Tribal Nation. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
974 WWUS73 KFSD 152000 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 300 PM CDT Fri Oct 15 2021 IAZ001-002-012-013-MNZ089-097-098-SDZ038>040-053>056-160700- /O.UPG.KFSD.FR.Y.0007.211016T0700Z-211016T1500Z/ /O.NEW.KFSD.FZ.W.0001.211016T0700Z-211016T1500Z/ Lyon-Osceola-Sioux-O'Brien-Nobles-Pipestone-Rock-Beadle-Kingsbury- Brookings-Sanborn-Miner-Lake-Moody- 300 PM CDT Fri Oct 15 2021 ...FREEZE WARNING IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of east central South Dakota, northwest Iowa and southwest Minnesota. This includes the Tribal Lands of the Flandreau Santee Sioux Tribal Nation. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ IAZ003-014-020>022-031-032-MNZ071-072-080-081-090-NEZ013-014- SDZ050-052-057>071-160700- /O.CON.KFSD.FR.Y.0007.211016T0700Z-211016T1500Z/ Dickinson-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-Lincoln- Lyon-Murray-Cottonwood-Jackson-Dixon-Dakota-Gregory-Jerauld-Brule- Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton-Union- 300 PM CDT Fri Oct 15 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central, south central and southeast South Dakota, northeast Nebraska, northwest and west central Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
428 WWUS73 KFSD 160322 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 1022 PM CDT Fri Oct 15 2021 IAZ001-002-012-013-MNZ089-097-098-SDZ038>040-053>056-161130- /O.CON.KFSD.FZ.W.0001.211016T0700Z-211016T1500Z/ Lyon-Osceola-Sioux-O'Brien-Nobles-Pipestone-Rock-Beadle-Kingsbury- Brookings-Sanborn-Miner-Lake-Moody- 1022 PM CDT Fri Oct 15 2021 ...FREEZE WARNING REMAINS IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Sub-freezing temperatures as low as 30 expected. * WHERE...Portions of east central South Dakota, northwest Iowa and southwest Minnesota. This includes the Tribal Lands of the Flandreau Santee Sioux Tribal Nation. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ IAZ003-014-020>022-031-032-MNZ071-072-080-081-090-NEZ013-014- SDZ050-052-057>071-161130- /O.CON.KFSD.FR.Y.0007.211016T0700Z-211016T1500Z/ Dickinson-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-Lincoln- Lyon-Murray-Cottonwood-Jackson-Dixon-Dakota-Gregory-Jerauld-Brule- Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton-Union- 1022 PM CDT Fri Oct 15 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 2 AM TO 10 AM CDT SATURDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Portions of central, south central and southeast South Dakota, northeast Nebraska, northwest and west central Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation. * WHEN...From 2 AM to 10 AM CDT Saturday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
591 WWUS73 KFSD 160743 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 243 AM CDT Sat Oct 16 2021 IAZ001-002-012-013-MNZ089-097-098-SDZ038>040-053>056-161500- /O.CON.KFSD.FZ.W.0001.000000T0000Z-211016T1500Z/ Lyon-Osceola-Sioux-O'Brien-Nobles-Pipestone-Rock-Beadle-Kingsbury- Brookings-Sanborn-Miner-Lake-Moody- 243 AM CDT Sat Oct 16 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 30 degrees. * WHERE...Portions of east central South Dakota, northwest Iowa and southwest Minnesota. This includes the Tribal Lands of the Flandreau Santee Sioux Tribal Nation. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Frost and freeze conditions will kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly. Those that have in-ground sprinkler systems should drain them and cover above- ground pipes to protect them from freezing. && $$ IAZ003-014-020>022-031-032-MNZ071-072-080-081-090-NEZ013-014- SDZ050-052-057>071-161500- /O.CON.KFSD.FR.Y.0007.000000T0000Z-211016T1500Z/ Dickinson-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-Lincoln- Lyon-Murray-Cottonwood-Jackson-Dixon-Dakota-Gregory-Jerauld-Brule- Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton-Union- 243 AM CDT Sat Oct 16 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 10 AM CDT THIS MORNING... * WHAT...Temperatures as low as 32 degrees will result in frost formation. * WHERE...Portions of central, south central and southeast South Dakota, northeast Nebraska, northwest and west central Iowa and southwest Minnesota. This includes the Tribal Lands of the Yankton Sioux Tribal Nation. * WHEN...Until 10 AM CDT this morning. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
155 WWUS73 KFSD 161439 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 939 AM CDT Sat Oct 16 2021 IAZ001-002-012-013-MNZ089-097-098-SDZ038>040-053>056-161545- /O.CAN.KFSD.FZ.W.0001.000000T0000Z-211016T1500Z/ Lyon-Osceola-Sioux-O'Brien-Nobles-Pipestone-Rock-Beadle-Kingsbury- Brookings-Sanborn-Miner-Lake-Moody- 939 AM CDT Sat Oct 16 2021 ...FREEZE WARNING IS CANCELLED... Temperatures have warmed above freezing, so the Freeze Warning has been cancelled. $$ IAZ003-014-020>022-031-032-MNZ071-072-080-081-090-NEZ013-014- SDZ050-052-057>071-161545- /O.CAN.KFSD.FR.Y.0007.000000T0000Z-211016T1500Z/ Dickinson-Clay-Plymouth-Cherokee-Buena Vista-Woodbury-Ida-Lincoln- Lyon-Murray-Cottonwood-Jackson-Dixon-Dakota-Gregory-Jerauld-Brule- Aurora-Davison-Hanson-McCook-Minnehaha-Charles Mix-Douglas- Hutchinson-Turner-Bon Homme-Yankton-Union- 939 AM CDT Sat Oct 16 2021 ...FROST ADVISORY IS CANCELLED... Temperatures have warmed into the upper 30s to lower 40s, so the Frost Advisory has been cancelled. $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 15, 3:00 PM CDT | Freeze Warning | FSD | Nobles, Pipestone, Rock | 19 hr |
Nearby
Frost Advisories in South Dakota, 2021Frost Advisories in Iowa, 2021Frost Advisories in Minnesota, 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.