Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 13, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Apr 29, 2021, 3:31 PM CDT for 4 counties in South Dakota. It took effect at Apr 30, 2021, 1:00 PM CDT. 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
- Apr 29, 2021, 3:31 PM CDT (20:31 UTC)
- In effect from
- Apr 30, 2021, 1:00 PM CDT
- Expired
- Apr 30, 2021, 9:00 PM CDT
- In force
- 8 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 20:30 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, 8.5 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
- 1695 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
887 WWUS83 KABR 292031 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 331 PM CDT Thu Apr 29 2021 SDZ003-004-009-015-300915- /O.UPG.KABR.FW.A.0004.210430T1800Z-210501T0100Z/ /O.NEW.KABR.FW.W.0013.210430T1800Z-210501T0100Z/ Corson-Campbell-Walworth-Dewey- 331 PM CDT Thu Apr 29 2021 /231 PM MDT Thu Apr 29 2021/ ...RED FLAG WARNING IN EFFECT FROM 1 PM CDT /NOON MDT/ TO 8 PM CDT /7 PM MDT/ FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR 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 1 PM CDT /noon MDT/ to 8 PM CDT /7 PM MDT/ Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In South Dakota, Corson, Campbell, Walworth and Dewey. * WINDS...South 15 to 25 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...From 15 to 20 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. && $$ Mohr
3 follow-up statements
620 WWUS83 KABR 300753 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 253 AM CDT Fri Apr 30 2021 SDZ003-004-009-015-301800- /O.EXT.KABR.FW.W.0013.210430T1800Z-210501T0200Z/ Corson-Campbell-Walworth-Dewey- 253 AM CDT Fri Apr 30 2021 /153 AM MDT Fri Apr 30 2021/ ...RED FLAG WARNING NOW IN EFFECT FROM 1 PM CDT /NOON MDT/ THIS AFTERNOON TO 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson, Campbell, Walworth and Dewey. * WINDS...South 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...From 15 to 20 percent. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ LUECK
823 WWUS83 KABR 301734 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1234 PM CDT Fri Apr 30 2021 SDZ003-004-009-015-010200- /O.CON.KABR.FW.W.0013.210430T1800Z-210501T0200Z/ Corson-Campbell-Walworth-Dewey- 1234 PM CDT Fri Apr 30 2021 /1134 AM MDT Fri Apr 30 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson, Campbell, Walworth and Dewey. * WINDS...South 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...From 15 to 20 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. && $$ Telken
057 WWUS83 KABR 010158 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 858 PM CDT Fri Apr 30 2021 SDZ003-004-009-015-010300- /O.EXP.KABR.FW.W.0013.000000T0000Z-210501T0200Z/ Corson-Campbell-Walworth-Dewey- 858 PM CDT Fri Apr 30 2021 /758 PM MDT Fri Apr 30 2021/ ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR NORTH CENTRAL SOUTH DAKOTA... As temperatures cool and relative humidities rise, the fire danger will lower, thus the red flag warning is being allowed to expire. $$
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 2:17 AM CDT | Fire Weather Watch | ABR | Campbell, Corson, Dewey, Walworth | 13 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.