Alert archive / South Dakota / Red Flag Warnings in 2021
Red Flag Warning 17, NWS Aberdeen, SD
NWS Aberdeen, SD issued this red flag warning at Jul 3, 2021, 2:57 AM CDT for 10 counties in South Dakota. It took effect at Jul 3, 2021, 1:00 PM CDT. It was in force for 5 hr. 1 report 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
- Jul 3, 2021, 2:57 AM CDT (07:57 UTC)
- In effect from
- Jul 3, 2021, 1:00 PM CDT
- Expired
- Jul 3, 2021, 6:17 PM CDT
- In force
- 5 hr
- Issued by
- NWS Aberdeen, SD
Counties Campbell County, SD, Corson County, SD, Dewey County, SD, Hughes County, SD, Jones County, SD, Lyman County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 166 km from the middle of the area, began a volume at 07:57 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 |
|---|---|---|---|
| Jul 3, 6:00 PM CDT | TSTM WND GST 70 | 5 Se Capa, SD | SEVERAL OBJECTS MOVED BY THE STRONG WINDS INCLUDING DAMAGE TO CORN CROPS. |
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, 8.0 hours before the alert went out and 154 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
- 2492 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 69 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
547 WWUS83 KABR 030757 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 257 AM CDT Sat Jul 3 2021 SDZ003-004-009-015-016-033>035-045-048-031600- /O.NEW.KABR.FW.W.0017.210703T1800Z-210704T0100Z/ Corson-Campbell-Walworth-Dewey-Potter-Stanley-Sully-Hughes-Jones- Lyman- 257 AM CDT Sat Jul 3 2021 /157 AM MDT Sat Jul 3 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 AND 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/ this afternoon to 8 PM CDT /7 PM MDT/ this evening. * AFFECTED AREA...In South Dakota, Corson, Campbell, Walworth, Dewey, Potter, Stanley, Sully, Hughes, Jones and Lyman. * WINDS...South 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...These conditions are supportive of rapid fire growth. 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. && $$ Connelly
2 follow-up statements
124 WWUS83 KABR 031544 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 1044 AM CDT Sat Jul 3 2021 SDZ003-004-009-015-016-033>035-045-048-032345- /O.CON.KABR.FW.W.0017.210703T1800Z-210704T0100Z/ Corson-Campbell-Walworth-Dewey-Potter-Stanley-Sully-Hughes-Jones- Lyman- 1044 AM CDT Sat Jul 3 2021 /944 AM MDT Sat Jul 3 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT /7 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR CENTRAL AND NORTH CENTRAL SOUTH DAKOTA... * AFFECTED AREA...In South Dakota, Corson, Campbell, Walworth, Dewey, Potter, Stanley, Sully, Hughes, Jones and Lyman. * WINDS...South 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...These conditions are supportive of rapid fire growth. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Dorn
754 WWUS83 KABR 032317 RFWABR URGENT - FIRE WEATHER MESSAGE National Weather Service Aberdeen SD 617 PM CDT Sat Jul 3 2021 SDZ003-004-009-015-016-033>035-045-048-040030- /O.CAN.KABR.FW.W.0017.000000T0000Z-210704T0100Z/ Corson-Campbell-Walworth-Dewey-Potter-Stanley-Sully-Hughes-Jones- Lyman- 617 PM CDT Sat Jul 3 2021 /517 PM MDT Sat Jul 3 2021/ ...RED FLAG WARNING IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR CENTRAL AND NORTH CENTRAL SOUTH DAKOTA... The National Weather Service in Aberdeen has cancelled the Red Flag Warning. Winds will remain gusty for the next few hours before diminishing. However, the ongoing showers and thunderstorms are keeping RH from falling below 20 percent this evening. $$
The office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 3, 5:05 PM CDT | Special Weather Statement | ABR | Jones | 25 min |
| Jul 3, 5:36 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 39 min |
| Jul 3, 5:42 PM CDT | Special Weather Statement | ABR | Dewey | 33 min |
| Jul 3, 6:10 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 50 min |
| Jul 3, 6:29 PM CDT | Special Weather Statement | ABR | Walworth | 31 min |
| Jul 3, 6:35 PM CDT | Severe Thunderstorm Warning | ABR | Corson, Dewey, Potter, Walworth | 40 min |
| Jul 3, 6:57 PM CDT | Severe Thunderstorm Warning | ABR | Jones | 33 min |
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.