Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 20, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Sep 5, 2021, 1:51 PM MDT for Corson County, Dewey County, South Dakota. It took effect at Sep 6, 2021, 12:00 PM MDT. It was in force for 6 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 5, 2021, 1:51 PM MDT (19:51 UTC)
- In effect from
- Sep 6, 2021, 12:00 PM MDT
- Expired
- Sep 6, 2021, 6:10 PM MDT
- In force
- 6 hr
- Issued by
- NWS Aberdeen, SD
Counties Corson County, SD, Dewey County, SD
The radar
The Bismarck radar (KBIS), 150 km from the middle of the area, began a volume at 19:51 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, 7.9 hours before the alert went out and 151 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
- 2131 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
052 WWUS83 KABR 051951 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 251 PM CDT Sun Sep 5 2021 SDZ003-015-060400- /O.UPG.KABR.FW.A.0010.210906T1800Z-210907T0300Z/ /O.NEW.KABR.FW.W.0020.210906T1800Z-210907T0300Z/ Corson-Dewey- 151 PM MDT Sun Sep 5 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT MONDAY 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 9 PM MDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In South Dakota, Corson and Dewey. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 15 percent. * IMPACTS... The combination of gusty winds and low relative humidity will be supportive of rapid fire growth. Any fires will 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. && $$ Parkin
3 follow-up statements
709 WWUS83 KABR 060408 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1108 PM CDT Sun Sep 5 2021 SDZ003-015-061215- /O.CON.KABR.FW.W.0020.210906T1800Z-210907T0300Z/ Corson-Dewey- 1008 PM MDT Sun Sep 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson and Dewey. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS... The combination of gusty winds and low relative humidity will be supportive of rapid fire growth. Any fires will become difficult to control and suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
930 WWUS83 KABR 061135 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 635 AM CDT Mon Sep 6 2021 SDZ003-015-070300- /O.CON.KABR.FW.W.0020.210906T1800Z-210907T0300Z/ Corson-Dewey- 535 AM MDT Mon Sep 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson and Dewey. * WINDS...West 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS... The combination of gusty winds and low relative humidity will be supportive of rapid fire growth. Any fires will 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. && $$
380 WWUS83 KABR 070010 AAA RFWABR URGENT - FIRE WEATHER MESSAGE...UPDATED National Weather Service Aberdeen SD 710 PM CDT Mon Sep 6 2021 SDZ003-015-070115- /O.CAN.KABR.FW.W.0020.000000T0000Z-210907T0300Z/ Corson-Dewey- 610 PM MDT Mon Sep 6 2021 ...RED FLAG WARNING IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTH CENTRAL SOUTH DAKOTA... The National Weather Service in Aberdeen has cancelled the Red Flag Warning. Conditions have improved across the region. $$ Mohr
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 2:36 AM MDT | Fire Weather Watch | ABR | Corson, Dewey | 11 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.