Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 22, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Sep 24, 2021, 3:59 AM CDT for 4 counties in South Dakota. It took effect at Sep 24, 2021, 2:00 PM CDT. It was in force for 5 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 24, 2021, 3:59 AM CDT (08:59 UTC)
- In effect from
- Sep 24, 2021, 2:00 PM CDT
- Expired
- Sep 24, 2021, 7:00 PM CDT
- In force
- 5 hr
- Issued by
- NWS Aberdeen, SD
Counties Campbell County, SD, Corson County, SD, Dewey County, SD, Walworth County, SD
The radar
The Bismarck radar (KBIS), 140 km from the middle of the area, began a volume at 08:59 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 00:00Z, 9.0 hours before the alert went out and 140 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
- 2754 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -61 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
442 WWUS83 KABR 240859 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 359 AM CDT Fri Sep 24 2021 SDZ033-045-241000- /O.CAN.KABR.FW.A.0011.210924T1900Z-210925T0100Z/ Stanley-Jones- 359 AM CDT Fri Sep 24 2021 /259 AM MDT Fri Sep 24 2021/ ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF CENTRAL SOUTH DAKOTA... The National Weather Service in Aberdeen has cancelled the Fire Weather Watch. $$ SDZ003-015-241700- /O.UPG.KABR.FW.A.0011.210924T1900Z-210925T0100Z/ /O.NEW.KABR.FW.W.0022.210924T1900Z-210925T0000Z/ Corson-Dewey- 259 AM MDT Fri Sep 24 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SD... The National Weather Service in Aberdeen has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 1 PM this afternoon to 6 PM MDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In South Dakota, Corson and Dewey. * WINDS...Northwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS...The combination of gusty winds and low relative humidity will be supportive of rapid fire growth. Any fires could become difficult to control and suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ SDZ004-009-241700- /O.NEW.KABR.FW.W.0022.210924T1900Z-210925T0000Z/ Campbell-Walworth- 359 AM CDT Fri Sep 24 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SD... The National Weather Service in Aberdeen has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 2 PM this afternoon to 7 PM CDT this evening. * AFFECTED AREA...In South Dakota, Campbell and Walworth. * WINDS...Northwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 19 percent. * IMPACTS...The combination of gusty winds and low relative humidity will be supportive of rapid fire growth. Any fires could 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. && $$
2 follow-up statements
366 WWUS83 KABR 241603 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1103 AM CDT Fri Sep 24 2021 SDZ003-004-009-015-250000- /O.CON.KABR.FW.W.0022.210924T1900Z-210925T0000Z/ Corson-Campbell-Walworth-Dewey- 1103 AM CDT Fri Sep 24 2021 /1003 AM MDT Fri Sep 24 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT /6 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SD... * AFFECTED AREA...In South Dakota, Corson, Campbell, Walworth and Dewey. * WINDS...Northwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 15 to 20 percent. * IMPACTS...The combination of gusty winds and low relative humidity will be supportive of rapid fire growth. Any fires could become difficult to control and suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
783 WWUS83 KABR 250001 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 701 PM CDT Fri Sep 24 2021 SDZ003-004-009-015-250115- /O.EXP.KABR.FW.W.0022.000000T0000Z-210925T0000Z/ Corson-Campbell-Walworth-Dewey- 701 PM CDT Fri Sep 24 2021 /601 PM MDT Fri Sep 24 2021/ ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SD... Wind speeds have diminished across the area, and as temperatures begin to cool, relative humidity values will rise. Therefore, the Red Flag Warning has been allowed to expire. $$ Parkin
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 24, 2:16 PM CDT | Frost Advisory | ABR | Brown, Campbell, Clark, Codington, Day, Edmunds and 5 more | 19 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.