Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 24, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Oct 6, 2021, 2:40 AM MDT for 4 counties in South Dakota. It took effect at Oct 6, 2021, 11:00 AM MDT. 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
- Oct 6, 2021, 2:40 AM MDT (08:40 UTC)
- In effect from
- Oct 6, 2021, 11:00 AM MDT
- Expired
- Oct 6, 2021, 7:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Aberdeen, SD
Counties Corson County, SD, Dewey County, SD, Jones County, SD, Stanley County, SD
The radar
The Rapid City radar (KUDX), 173 km from the middle of the area, began a volume at 08:41 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
Rapid City, SD (KUNR), launched 00:00Z, 8.7 hours before the alert went out and 179 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
- 3809 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
134 WWUS83 KABR 060840 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 340 AM CDT Wed Oct 6 2021 SDZ003-015-033-045-061645- /O.NEW.KABR.FW.W.0024.211006T1700Z-211007T0100Z/ Corson-Dewey-Stanley-Jones- 340 AM CDT Wed Oct 6 2021 /240 AM MDT Wed Oct 6 2021/ ...RED FLAG WARNING IN EFFECT FROM NOON CDT /11 AM MDT/ TODAY TO 8 PM CDT /7 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR CENTRAL SOUTH DAKOTA... The National Weather Service in Aberdeen has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon CDT /11 AM MDT/ today to 8 PM CDT /7 PM MDT/ this evening. * AFFECTED AREA...In South Dakota, Corson, Dewey, Stanley and Jones. * WINDS...Southeast 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 20 TO 25 percent. 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. && $$ Mohr
2 follow-up statements
924 WWUS83 KABR 061608 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1108 AM CDT Wed Oct 6 2021 SDZ003-015-033-045-070100- /O.CON.KABR.FW.W.0024.211006T1700Z-211007T0100Z/ Corson-Dewey-Stanley-Jones- 1108 AM CDT Wed Oct 6 2021 /1008 AM MDT Wed Oct 6 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT /7 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson, Dewey, Stanley and Jones. * WINDS...Southeast 20 to 30 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 20 to 25 percent. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Parkin
417 WWUS83 KABR 070052 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 752 PM CDT Wed Oct 6 2021 SDZ003-015-033-045-070200- /O.EXP.KABR.FW.W.0024.000000T0000Z-211007T0100Z/ Corson-Dewey-Stanley-Jones- 752 PM CDT Wed Oct 6 2021 /652 PM MDT Wed Oct 6 2021/ ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT /7 PM MDT/ THIS EVENING FOR CENTRAL SOUTH DAKOTA... Boundary layer humidity is slowly improving and wind speeds are diminishing. The warning will be allowed to expire. $$ Dorn
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.