Alert archive / South Dakota / Frost Advisories in 2021
Frost Advisory 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this frost advisory at May 9, 2021, 3:22 PM CDT for 11 counties in South Dakota. It took effect at May 10, 2021, 4:00 AM CDT. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- May 9, 2021, 3:22 PM CDT (20:22 UTC)
- In effect from
- May 10, 2021, 4:00 AM CDT
- Expired
- May 10, 2021, 8:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Sioux Falls, SD
Counties Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Davison County, SD, Douglas County, SD, Hanson County, SD, Jerauld County, SD, Kingsbury County, SD, Miner County, SD, Sanborn County, SD
The radar
The Sioux Falls radar (KFSD), 115 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 109 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
- 1677 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
382 WWUS73 KFSD 092022 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 322 PM CDT Sun May 9 2021 SDZ038-039-052-053-100430- /O.NEW.KFSD.FR.Y.0004.210510T0900Z-210510T1300Z/ Beadle-Kingsbury-Jerauld-Sanborn- 322 PM CDT Sun May 9 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM CDT MONDAY... * WHAT...Temperatures as low as 33 to 35 will result in frost formation. * WHERE...Beadle, Kingsbury, Jerauld and Sanborn Counties. * WHEN...From 4 AM to 8 AM CDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
3 follow-up statements
496 WWUS73 KFSD 100141 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 841 PM CDT Sun May 9 2021 SDZ040-054-057>060-064-100945- /O.EXA.KFSD.FR.Y.0004.210510T0900Z-210510T1300Z/ Brookings-Miner-Brule-Aurora-Davison-Hanson-Douglas- 841 PM CDT Sun May 9 2021 ...FROST ADVISORY IN EFFECT FROM 4 AM TO 8 AM CDT MONDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Brookings, Miner, Brule, Aurora, Davison, Hanson and Douglas Counties. * WHEN...From 4 AM to 8 AM CDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ SDZ038-039-052-053-100945- /O.CON.KFSD.FR.Y.0004.210510T0900Z-210510T1300Z/ Beadle-Kingsbury-Jerauld-Sanborn- 841 PM CDT Sun May 9 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM CDT MONDAY... * WHAT...Temperatures as low as 32 will result in frost formation. * WHERE...Jerauld, Sanborn, Beadle and Kingsbury Counties. * WHEN...From 4 AM to 8 AM CDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
919 WWUS73 KFSD 100503 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 1203 AM CDT Mon May 10 2021 SDZ038>040-052>054-057>060-064-101300- /O.CON.KFSD.FR.Y.0004.210510T0900Z-210510T1300Z/ Beadle-Kingsbury-Brookings-Jerauld-Sanborn-Miner-Brule-Aurora- Davison-Hanson-Douglas- 1203 AM CDT Mon May 10 2021 ...FROST ADVISORY REMAINS IN EFFECT FROM 4 AM TO 8 AM CDT MONDAY... * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of central, east central, south central and southeast South Dakota. * WHEN...From 4 AM to 8 AM CDT Monday. * IMPACTS...Frost could kill sensitive outdoor vegetation if left uncovered. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps to protect tender plants from the cold. && $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
719 WWUS73 KFSD 101307 NPWFSD URGENT - WEATHER MESSAGE National Weather Service Sioux Falls SD 807 AM CDT Mon May 10 2021 SDZ038>040-052>054-057>060-064-101415- /O.EXP.KFSD.FR.Y.0004.000000T0000Z-210510T1300Z/ Beadle-Kingsbury-Brookings-Jerauld-Sanborn-Miner-Brule-Aurora- Davison-Hanson-Douglas- 807 AM CDT Mon May 10 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures have climbed into the lower 40s, and the threat for widespread frost has ended. $$ For more information from the National Weather Service visit https://weather.gov/siouxfalls
Nearby
Frost Advisories in South Dakota, 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.