Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 26, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Nov 23, 2021, 2:15 AM CST for Jones County, Lyman County, South Dakota. It took effect at Nov 23, 2021, 11:00 AM CST. 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
- Nov 23, 2021, 2:15 AM CST (08:15 UTC)
- In effect from
- Nov 23, 2021, 11:00 AM CST
- Expired
- Nov 23, 2021, 6:00 PM CST
- In force
- 7 hr
- Issued by
- NWS Aberdeen, SD
Counties Jones County, SD, Lyman County, SD
The radar
The Rapid City radar (KUDX), 206 km from the middle of the area, began a volume at 08:19 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
Aberdeen, SD (KABR), launched 00:00Z, 8.3 hours before the alert went out and 184 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
- 1707 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 194 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
753 WWUS83 KABR 230815 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 215 AM CST Tue Nov 23 2021 SDZ045-048-231615- /O.UPG.KABR.FW.A.0012.211123T1700Z-211124T0000Z/ /O.NEW.KABR.FW.W.0026.211123T1700Z-211124T0000Z/ Jones-Lyman- 215 AM CST Tue Nov 23 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR JONES AND LYMAN COUNTIES IN SOUTH 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 11 AM this morning to 6 PM CST this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In South Dakota, Jones and Lyman. * WINDS...West 10 to 20 mph with gusts as high as 25 to 30 mph. * RELATIVE HUMIDITY...As low as 16 percent. * IMPACTS...A combination of strong winds, low relative humidity, and warm temperatures could contribute to critical fire weather conditions. 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. && $$ KF
2 follow-up statements
883 WWUS83 KABR 231602 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1002 AM CST Tue Nov 23 2021 SDZ045-048-240000- /O.CON.KABR.FW.W.0026.211123T1700Z-211124T0000Z/ Jones-Lyman- 1002 AM CST Tue Nov 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR JONES AND LYMAN COUNTIES IN SOUTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Jones and Lyman. * WINDS...West 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...A combination of strong winds, low relative humidity, and warm temperatures could contribute to critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
776 WWUS83 KABR 232349 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 549 PM CST Tue Nov 23 2021 SDZ045-048-240100- /O.EXP.KABR.FW.W.0026.000000T0000Z-211124T0000Z/ Jones-Lyman- 549 PM CST Tue Nov 23 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR JONES AND LYMAN COUNTIES IN SOUTH CENTRAL SOUTH DAKOTA... The red flag warning will be allowed to expire due to decreasing winds and increasing relative humidity. $$
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.