Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 5, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Mar 30, 2021, 1:14 AM MDT for 6 counties in South Dakota. It took effect at Mar 30, 2021, 12:00 PM MDT. It was in force for 7 hr. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Mar 30, 2021, 1:14 AM MDT (07:14 UTC)
- In effect from
- Mar 30, 2021, 12:00 PM MDT
- Expired
- Mar 30, 2021, 7:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Aberdeen, SD
Counties Dewey County, SD, Hughes County, SD, Jones County, SD, Lyman County, SD, Stanley County, SD, Sully County, SD
The radar
The Aberdeen radar (KABR), 193 km from the middle of the area, began a volume at 07:17 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 30, 1:55 PM MDT | NON-TSTM WND GST 59 | 13 Nnw Sansarc, SD | MESONET STATION 168 FOSTER BAY (SDDOT). |
| Mar 30, 2:00 PM MDT | NON-TSTM WND GST 61 | 10 Sw Chantler Creek Re, SD | MESONET STATION 202 HAYES (SDDOT). |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 7.2 hours before the alert went out and 165 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
- 2439 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- -110 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
707 WWUS83 KABR 300714 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 214 AM CDT Tue Mar 30 2021 SDZ015-033>035-045-048-301515- /O.UPG.KABR.FW.A.0002.210330T1800Z-210331T0100Z/ /O.NEW.KABR.FW.W.0005.210330T1800Z-210331T0100Z/ Dewey-Stanley-Sully-Hughes-Jones-Lyman- 214 AM CDT Tue Mar 30 2021 /114 AM MDT Tue Mar 30 2021/ ...RED FLAG WARNING IN EFFECT FROM 1 PM CDT /NOON MDT/ THIS AFTERNOON TO 8 PM CDT /7 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR 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/ this afternoon to 8 PM CDT /7 PM MDT/ this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In South Dakota, Dewey, Stanley, Sully, Hughes, Jones and Lyman. * WINDS...Northwest 25 to 35 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS...The combination of gusty winds and low relative humidity will produce 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. && $$ Dorn
2 follow-up statements
675 WWUS83 KABR 301426 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 926 AM CDT Tue Mar 30 2021 SDZ015-033>035-045-048-310100- /O.CON.KABR.FW.W.0005.210330T1800Z-210331T0100Z/ Dewey-Stanley-Sully-Hughes-Jones-Lyman- 926 AM CDT Tue Mar 30 2021 /826 AM MDT Tue Mar 30 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM CDT /NOON MDT/ THIS AFTERNOON TO 8 PM CDT /7 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Dewey, Stanley, Sully, Hughes, Jones and Lyman. * WINDS...Northwest 30 to 35 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...The combination of gusty winds and low relative humidity will produce critical fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
560 WWUS83 KABR 310102 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 802 PM CDT Tue Mar 30 2021 SDZ015-033>035-045-048-310215- /O.EXP.KABR.FW.W.0005.000000T0000Z-210331T0100Z/ Dewey-Stanley-Sully-Hughes-Jones-Lyman- 802 PM CDT Tue Mar 30 2021 /702 PM MDT Tue Mar 30 2021/ ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR CENTRAL SOUTH DAKOTA... Winds speeds will continue to diminish through the evening, and relative humidities will rise. Therefore, have allowed the Red Flag Warning to expire. $$ Parkin
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 8:04 PM MDT | High Wind Warning | ABR | Brown, Buffalo, Campbell, Clark, Codington, Corson and 20 more | 10 hr |
| Mar 29, 8:04 PM MDT | Wind Advisory | ABR | Brown, Buffalo, Campbell, Clark, Codington, Corson and 20 more | 21 hr |
| Mar 30, 5:11 PM MDT | Wind Advisory | ABR | Brown, Buffalo, Campbell, Clark, Codington, Corson and 20 more | 3 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.