Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this red flag warning at Mar 5, 2021, 3:08 PM CST for Gregory County, South Dakota. It took effect at Mar 6, 2021, 12:00 PM CST. It was in force for 8 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 5, 2021, 3:08 PM CST (21:08 UTC)
- In effect from
- Mar 6, 2021, 12:00 PM CST
- Expired
- Mar 6, 2021, 8:00 PM CST
- In force
- 8 hr
- Issued by
- NWS Sioux Falls, SD
County Gregory County, SD
The radar
The North Platte radar (KLNX), 178 km from the middle of the area, began a volume at 21:10 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, 9.1 hours before the alert went out and 200 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
- 757 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
368 WWUS83 KFSD 052108 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 308 PM CST Fri Mar 5 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... .Gusty afternoon winds, along with well above normal temps and dry fuels result in low humidity levels Saturday afternoon, especially in south central SD. Humidity levels are marginal for hitting red flag conditions, but the dormant fuels and potential for winds gusting to 30 mph or greater at times should be able to overcome the marginal humidity. SDZ050-060515- /O.NEW.KFSD.FW.W.0001.210306T1800Z-210307T0200Z/ Gregory- 308 PM CST Fri Mar 5 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... The National Weather Service in Sioux Falls has issued a Red Flag Warning, which is in effect from noon to 8 PM CST Saturday. * AFFECTED AREA...Fire weather zone 050, Gregory County. * WIND...Southeast winds 15 to 25 mph with gusts to 30 to 35 mph. * 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. && $$
5 follow-up statements
610 WWUS83 KFSD 060336 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 936 PM CST Fri Mar 5 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... .Gusty afternoon winds, along with well above normal temps and dry fuels result in low humidity levels Saturday afternoon, especially in south central SD. Humidity levels are marginal for hitting red flag conditions, but the dormant fuels and potential for winds gusting to 30 mph or greater at times should be able to overcome the marginal humidity. SDZ050-061200- /O.CON.KFSD.FW.W.0001.210306T1800Z-210307T0200Z/ Gregory- 936 PM CST Fri Mar 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... * AFFECTED AREA...Fire weather zone 050, Gregory County. * WIND...Southeast winds 15 to 25 mph with gusts to 30 to 35 mph. * HUMIDITY...As low as 20 to 25 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
944 WWUS83 KFSD 060916 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 316 AM CST Sat Mar 6 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... Gusty afternoon winds, along with well above normal temps and dry fuels result in low humidity levels for this afternoon, especially in south central SD. Humidity levels are somewhat marginal for hitting red flag conditions, but the dormant fuels and potential for winds gusting to 30 mph or greater at times should be able to overcome the marginal humidity. SDZ050-061730- /O.CON.KFSD.FW.W.0001.210306T1800Z-210307T0200Z/ Gregory- 316 AM CST Sat Mar 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM CST THIS EVENING FOR LOW HUMIDITY FOR FIRE WEATHER ZONE 050... * AFFECTED AREA...Fire weather zone 050, Gregory County. * WIND...Southeast winds 15 to 25 mph with gusts to 30 to 35 mph. * 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. && $$
730 WWUS83 KFSD 061702 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 1102 AM CST Sat Mar 6 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... Gusty afternoon winds, along with well above normal temps and dry fuels result in low humidity levels for this afternoon, especially in south central SD. Humidity levels are somewhat marginal for hitting red flag conditions, but the dormant fuels and potential for winds gusting to 30 mph or greater at times should be able to overcome the marginal humidity. SDZ050-070115- /O.CON.KFSD.FW.W.0001.210306T1800Z-210307T0200Z/ Gregory- 1102 AM CST Sat Mar 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CST THIS EVENING FOR LOW HUMIDITY FOR FIRE WEATHER ZONE 050... * AFFECTED AREA...Fire weather zone 050, Gregory County. * WIND...Southeast winds 15 to 25 mph with gusts to 30 to 35 mph. * HUMIDITY...As low as 20 to 25 percent. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
915 WWUS83 KFSD 062233 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 433 PM CST Sat Mar 6 2021 ...RED FLAG WARNING IN EFFECT THROUGH 8 PM CST SATURDAY FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONE 050... Gusty afternoon winds, along with well above normal temps and dry fuels will result in low humidity levels this afternoon, especially in south central SD. Humidity levels are somewhat marginal for hitting red flag conditions, but the dormant fuels and potential for winds gusting to 30 mph or greater at times should be able to overcome the marginal humidity. SDZ050-070200- /O.CON.KFSD.FW.W.0001.000000T0000Z-210307T0200Z/ Gregory- 433 PM CST Sat Mar 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CST THIS EVENING FOR LOW HUMIDITY FOR FIRE WEATHER ZONE 050... * AFFECTED AREA...Fire weather zone 050, Gregory County. * WIND...Southeast winds 15 to 25 mph with gusts to 30 to 35 mph. * 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. && $$ Rogers
332 WWUS83 KFSD 070150 RFWFSD URGENT - FIRE WEATHER MESSAGE National Weather Service Sioux Falls SD 750 PM CST Sat Mar 6 2021 ...RED FLAG WARNING WILL EXPIRE at 8 PM CST THIS EVENING... SDZ050-070300- /O.EXP.KFSD.FW.W.0001.000000T0000Z-210307T0200Z/ Gregory- 750 PM CST Sat Mar 6 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM CST THIS EVENING FOR LOW HUMIDITY FOR FIRE WEATHER ZONE 050... The Red Flag Warning for Gregory County will expire at 8 PM CST. While some southerly breezes will continue overnight, wind gusts and relative humidity are no longer at critical levels. $$ Rogers
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 5, 4:11 AM CST | Dense Fog Advisory | FSD | Aurora, Beadle, Bon Homme, Brule, Charles Mix, Davison and 7 more | 6 hr |
Nearby
Red Flag Warnings in South Dakota, 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.