Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 3, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this red flag warning at Mar 29, 2021, 3:18 PM CDT for 19 counties in South Dakota; Plymouth County, Sioux County, Woodbury County, Iowa; Dakota County, Dixon County, Nebraska. It took effect at Mar 30, 2021, 12:00 PM CDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 29, 2021, 3:18 PM CDT (20:18 UTC)
- In effect from
- Mar 30, 2021, 12:00 PM CDT
- Expired
- Mar 30, 2021, 9:00 PM CDT
- In force
- 9 hr
- Issued by
- NWS Sioux Falls, SD
All 24 counties
Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Dakota County, NE, Dixon County, NE, Aurora County, SD, Beadle County, SD, Bon Homme 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, Lincoln County, SD, McCook County, SD, Miner County, SD, Sanborn County, SD, Turner County, SD, Union County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 76 km from the middle of the area, began a volume at 20:20 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, 8.3 hours before the alert went out and 188 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
- 2790 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
028 WWUS83 KFSD 292018 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 318 PM CDT Mon Mar 29 2021 IAZ012-020-031-NEZ013-014-SDZ038-050-052>054-057>061-063>071- 300200- /O.NEW.KFSD.FW.W.0003.210330T1700Z-210331T0200Z/ /O.CON.KFSD.FW.W.0002.000000T0000Z-210330T0200Z/ Sioux-Plymouth-Woodbury-Dixon-Dakota-Beadle-Gregory-Jerauld- Sanborn-Miner-Brule-Aurora-Davison-Hanson-McCook-Charles Mix- Douglas-Hutchinson-Turner-Lincoln-Bon Homme-Yankton-Clay-Union- 318 PM CDT Mon Mar 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR GUSTY WINDS, LOW HUMIDITY, AND NEAR RECORD TEMPERATURES FOR FIRE WEATHER ZONES 012, 013, 014, 020, 031, 038, 050, 052, 053, 054, 057, 058, 059, 060, 061, 063, 064, 065, 066, 067, 068, 069, 070, AND 071... ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM CDT TUESDAY FOR WINDY CONDITIONS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 012, 013, 014, 020, 031, 038, 050, 052, 053, 054, 057, 058, 059, 060, 061, 063, 064, 065, 066, 067, 068, 069, 070, AND 071... The National Weather Service in Sioux Falls has issued a Red Flag Warning, which is in effect from noon to 9 PM CDT Tuesday. * AFFECTED AREA...All fire weather zones in southeast South Dakota, northeast Nebraska, and northwest Iowa. * WIND...South to southwest 20 to 30 mph with gusts to 50 mph. Then winds quickly shift to the northwest this afternoon and evening as a strong cold front pushes through with gusts 40 to 50 mph. * HUMIDITY...As low as 15 to 25 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ IAZ001>003-013-014-021-022-032-MNZ071-072-080-081-089-090-097-098- SDZ039-040-055-056-062-300200- /O.CON.KFSD.FW.W.0002.000000T0000Z-210330T0200Z/ Lyon-Osceola-Dickinson-O'Brien-Clay-Cherokee-Buena Vista-Ida- Lincoln-Murray-Cottonwood-Nobles-Jackson-Pipestone-Rock-Kingsbury- Brookings-Lake-Moody-Minnehaha- 318 PM CDT Mon Mar 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR GUSTY WINDS, LOW HUMIDITY, AND NEAR RECORD TEMPERATURES FOR FIRE WEATHER ZONES 001, 002, 003, 013, 014, 021, 022, 032, 039, 040, 055, 056, 062, 071, 072, 080, 081, 089, 090, 097, AND 098... * AFFECTED AREA...All fire weather zones in southeast South Dakota, northeast Nebraska, and northwest Iowa. * WIND...South to southwest 20 to 30 mph with gusts to 50 mph. Then winds quickly shift to the northwest this afternoon and evening as a strong cold front pushes through with gusts 40 to 50 mph. * HUMIDITY...As low as 15 to 25 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
3 follow-up statements
785 WWUS83 KFSD 300201 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 901 PM CDT Mon Mar 29 2021 IAZ012-020-031-NEZ013-014-SDZ038-050-052>054-057>061-063>071- 301015- /O.EXP.KFSD.FW.W.0002.000000T0000Z-210330T0200Z/ /O.CON.KFSD.FW.W.0003.210330T1700Z-210331T0200Z/ Sioux-Plymouth-Woodbury-Dixon-Dakota-Beadle-Gregory-Jerauld- Sanborn-Miner-Brule-Aurora-Davison-Hanson-McCook-Charles Mix- Douglas-Hutchinson-Turner-Lincoln-Bon Homme-Yankton-Clay-Union- 901 PM CDT Mon Mar 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM CDT TUESDAY FOR FIRE WEATHER ZONES 012, 013, 014, 020, 031, 038, 050, 052, 053, 054, 057, 058, 059, 060, 061, 063, 064, 065, 066, 067, 068, 069, 070, AND 071... ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR FIRE WEATHER ZONES 012, 013, 014, 020, 031, 038, 050, 052, 053, 054, 057, 058, 059, 060, 061, 063, 064, 065, 066, 067, 068, 069, 070, AND 071... * AFFECTED AREA...All fire weather zones in southeast South Dakota, northeast Nebraska, and northwest Iowa. * WIND...Strong northwest winds will be sustained up to 30 mph with gust up to 45 mph through Tuesday afternoon * HUMIDITY...As low as 15 to 25 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ IAZ001>003-013-014-021-022-032-MNZ071-072-080-081-089-090-097-098- SDZ039-040-055-056-062-300315- /O.EXP.KFSD.FW.W.0002.000000T0000Z-210330T0200Z/ Lyon-Osceola-Dickinson-O'Brien-Clay-Cherokee-Buena Vista-Ida- Lincoln-Murray-Cottonwood-Nobles-Jackson-Pipestone-Rock-Kingsbury- Brookings-Lake-Moody-Minnehaha- 901 PM CDT Mon Mar 29 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR FIRE WEATHER ZONES 001, 002, 003, 013, 014, 021, 022, 032, 039, 040, 055, 056, 062, 071, 072, 080, 081, 089, 090, 097, AND 098... The Red Flag Warning will expire at 9 PM CST. While some northwesterly breezes will continue overnight, wind gusts and relative humidity are no longer at critical levels. $$
009 WWUS83 KFSD 300838 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 338 AM CDT Tue Mar 30 2021 IAZ012-020-031-NEZ013-014-SDZ038-050-052>054-057>061-063>071- 302100- /O.CON.KFSD.FW.W.0003.210330T1700Z-210331T0200Z/ Sioux-Plymouth-Woodbury-Dixon-Dakota-Beadle-Gregory-Jerauld- Sanborn-Miner-Brule-Aurora-Davison-Hanson-McCook-Charles Mix- Douglas-Hutchinson-Turner-Lincoln-Bon Homme-Yankton-Clay-Union- 338 AM CDT Tue Mar 30 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 012, 013, 014, 020, 031, 038, 050, 052, 053, 054, 057, 058, 059, 060, 061, 063, 064, 065, 066, 067, 068, 069, 070, AND 071... * AFFECTED AREA...Portions of southeast South Dakota, northeast Nebraska, and northwest Iowa. * WIND...Strong northwest winds will be sustained up to 30 mph with gust up to 45 mph through Tuesday afternoon * HUMIDITY...As low as 20 to 25 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
634 WWUS83 KFSD 310154 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 854 PM CDT Tue Mar 30 2021 IAZ012-020-031-NEZ013-014-SDZ038-050-052>054-057>061-063>071- 310300- /O.EXP.KFSD.FW.W.0003.000000T0000Z-210331T0200Z/ Sioux-Plymouth-Woodbury-Dixon-Dakota-Beadle-Gregory-Jerauld- Sanborn-Miner-Brule-Aurora-Davison-Hanson-McCook-Charles Mix- Douglas-Hutchinson-Turner-Lincoln-Bon Homme-Yankton-Clay-Union- 854 PM CDT Tue Mar 30 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR FIRE WEATHER ZONES 012, 013, 014, 020, 031, 038, 050, 052, 053, 054, 057, 058, 059, 060, 061, 063, 064, 065, 066, 067, 068, 069, 070, AND 071... The Red Flag Warning will expire at 9 PM CST. While some northwesterly breezes will continue overnight, wind gusts and relative humidity are no longer at critical levels. $$
Nearby
Red Flag Warnings in South Dakota, 2021Red Flag Warnings in Iowa, 2021Red Flag Warnings in Nebraska, 2021Every red flag warning 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.