Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 23, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Sep 27, 2021, 1:00 PM MDT for Corson County, South Dakota. It took effect at Sep 28, 2021, 12:00 PM MDT. It was in force for 7 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
- Sep 27, 2021, 1:00 PM MDT (19:00 UTC)
- In effect from
- Sep 28, 2021, 12:00 PM MDT
- Expired
- Sep 28, 2021, 7:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Aberdeen, SD
County Corson County, SD
The radar
The Bismarck radar (KBIS), 123 km from the middle of the area, began a volume at 19:06 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 7.0 hours before the alert went out and 124 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
- 1900 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 387 m²/s²
- 0-3 km storm-relative helicity
- 399 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
192 WWUS83 KABR 271900 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 200 PM CDT Mon Sep 27 2021 SDZ003-280300- /O.NEW.KABR.FW.W.0023.210928T1800Z-210929T0100Z/ Corson- 100 PM MDT Mon Sep 27 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH 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 to 7 PM MDT Tuesday. * AFFECTED AREA...In South Dakota, Corson. * WINDS...South 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS... 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. && $$ kf
4 follow-up statements
691 WWUS83 KABR 280118 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 818 PM CDT Mon Sep 27 2021 SDZ003-280930- /O.CON.KABR.FW.W.0023.210928T1800Z-210929T0100Z/ Corson- 718 PM MDT Mon Sep 27 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson. * WINDS...South 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...The combination of gusty winds and low relative humidity will support rapid fire growth. If a fire develops, it would become difficult to control and suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Dorn
701 WWUS83 KABR 280721 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 221 AM CDT Tue Sep 28 2021 SDZ003-281930- /O.CON.KABR.FW.W.0023.210928T1800Z-210929T0100Z/ Corson- 121 AM MDT Tue Sep 28 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson. * WINDS...South 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...The combination of gusty winds and low relative humidity will support rapid fire growth. If a fire develops, it would become difficult to control and suppress. 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. && $$
141 WWUS83 KABR 281628 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1128 AM CDT Tue Sep 28 2021 SDZ003-290100- /O.CON.KABR.FW.W.0023.210928T1800Z-210929T0100Z/ Corson- 1028 AM MDT Tue Sep 28 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson. * WINDS...South 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 19 percent. * IMPACTS...The combination of gusty winds and low relative humidity will support rapid fire growth. If a fire develops, it would become difficult to control and suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Mohr
671 WWUS83 KABR 290100 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 800 PM CDT Tue Sep 28 2021 SDZ003-290200- /O.EXP.KABR.FW.W.0023.000000T0000Z-210929T0100Z/ Corson- 700 PM MDT Tue Sep 28 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... With sunset, the temperature is cooling and boundary layer relative humidity is slowly recovering. Look for a 10 to 20 mph southeast breeze to persist overnight, though. $$ 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.