Alert archive / North Dakota / Red Flag Warnings in 2021
Red Flag Warning 24, NWS Bismarck, ND
NWS Bismarck, ND issued this red flag warning at Aug 17, 2021, 3:17 AM MDT for 17 counties in North Dakota. It took effect at Aug 17, 2021, 11:00 AM MDT. It was in force for 9 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
- Aug 17, 2021, 3:17 AM MDT (09:17 UTC)
- In effect from
- Aug 17, 2021, 11:00 AM MDT
- Expired
- Aug 17, 2021, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Bismarck, ND
Counties Adams County, ND, Billings County, ND, Bowman County, ND, Burleigh County, ND, Dunn County, ND, Emmons County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Oliver County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND
The radar
The Bismarck radar (KBIS), 94 km from the middle of the area, began a volume at 09:18 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 00:00Z, 9.3 hours before the alert went out and 99 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
- 51 J/kg
- Mixed-layer CIN
- -225 J/kg
- Mixed-layer LCL
- 3665 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 167 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
472 WWUS83 KBIS 170917 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 417 AM CDT Tue Aug 17 2021 ...RED FLAG WARNING FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA THIS AFTERNOON AND EVENING... .Critical fire weather conditions are expected over southwest and much of central North Dakota this afternoon and evening. Relative humidity is forecast to fall into the 10 to 20 percent range this afternoon, with the lowest values in far southwest North Dakota. South-southeast winds will also increase to 15 to 20 mph this afternoon, and may become slightly stronger over parts of south central North Dakota. NDZ018>022-031>035-040>046-172130- /O.UPG.KBIS.FW.A.0014.210817T1700Z-210818T0200Z/ /O.NEW.KBIS.FW.W.0024.210817T1700Z-210818T0200Z/ Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley-Billings-Stark- Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons- 417 AM CDT Tue Aug 17 2021 /317 AM MDT Tue Aug 17 2021/ ...RED FLAG WARNING IN EFFECT FROM NOON CDT /11 AM MDT/ TODAY TO 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA... The National Weather Service in Bismarck has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon CDT /11 AM MDT/ today to 9 PM CDT /8 PM MDT/ this evening. The Fire Weather Watch is no longer in effect. * WINDS...Southeast 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Southwest and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$ Hollan
4 follow-up statements
065 WWUS83 KBIS 171339 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 839 AM CDT Tue Aug 17 2021 ...RED FLAG WARNING FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA THIS AFTERNOON AND EVENING... .Critical fire weather conditions are expected over southwest and much of central North Dakota this afternoon and evening. Relative humidity is forecast to fall into the 10 to 20 percent range this afternoon, with the lowest values in far southwest North Dakota. South-southeast winds will also increase to 15 to 20 mph this afternoon, and may become slightly stronger over parts of south central North Dakota. NDZ018>022-031>035-040>046-180145- /O.CON.KBIS.FW.W.0024.210817T1700Z-210818T0200Z/ Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley-Billings-Stark- Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons- 839 AM CDT Tue Aug 17 2021 /739 AM MDT Tue Aug 17 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON CDT /11 AM MDT/ TODAY TO 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...Southeast 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Southwest and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$ Telken
894 WWUS83 KBIS 171702 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 1202 PM CDT Tue Aug 17 2021 ...RED FLAG WARNING FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA THIS AFTERNOON AND EVENING... .Critical fire weather conditions are expected over southwest and much of central North Dakota this afternoon and evening. Relative humidity is forecast to fall into the 10 to 20 percent range this afternoon, with the lowest values in far southwest North Dakota. South-southeast winds will also increase to 15 to 20 mph this afternoon, and may become slightly stronger over parts of south central North Dakota. NDZ018>022-031>035-040>046-180200- /O.CON.KBIS.FW.W.0024.000000T0000Z-210818T0200Z/ Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley-Billings-Stark- Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons- 1202 PM CDT Tue Aug 17 2021 /1102 AM MDT Tue Aug 17 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...Southeast 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Southwest and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$ Telken
592 WWUS83 KBIS 171955 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 255 PM CDT Tue Aug 17 2021 ...RED FLAG WARNING FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA THIS AFTERNOON AND EVENING... .Critical fire weather conditions are expected over southwest and much of central North Dakota this afternoon and evening. Relative humidity is forecast to fall into the 10 to 20 percent range this afternoon, with the lowest values in far southwest North Dakota. South-southeast winds will also increase to 15 to 20 mph this afternoon, and may become slightly stronger over parts of south central North Dakota. NDZ018>022-031>035-040>046-180200- /O.CON.KBIS.FW.W.0024.000000T0000Z-210818T0200Z/ Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley-Billings-Stark- Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons- 255 PM CDT Tue Aug 17 2021 /155 PM MDT Tue Aug 17 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...Southeast 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Southwest and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$ Telken
277 WWUS83 KBIS 180159 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 859 PM CDT Tue Aug 17 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA... .Although low humidity values and breezy south winds may be found through the rest of the evening, critical fire weather danger is no longer expected tonight. Thus the Red Flag Warning will be allowed to expire at 9 PM CDT/8 PM MDT. Hot and dry conditions may return for many of these same areas on Wednesday. All should be mindful of any burn bans that are in effect. NDZ018>022-031>035-040>046-180300- /O.EXP.KBIS.FW.W.0024.000000T0000Z-210818T0200Z/ Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley-Billings-Stark- Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams-Sioux-Emmons- 859 PM CDT Tue Aug 17 2021 /759 PM MDT Tue Aug 17 2021/ ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTHWEST AND MUCH OF CENTRAL NORTH DAKOTA... Although low humidity values and breezy south winds may be found through the rest of the evening, critical fire weather danger is no longer expected tonight. Thus the Red Flag Warning will be allowed to expire at 9 PM CDT/8 PM MDT. Hot and dry conditions may return for many of these same areas on Wednesday. All should be mindful of any burn bans that are in effect. $$
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 11:12 PM MDT | Special Weather Statement | BIS | Adams, Bowman, Hettinger, Slope, Stark | 33 min |
| Aug 16, 11:47 PM MDT | Special Weather Statement | BIS | Grant, Hettinger | 43 min |
Nearby
Red Flag Warnings in North 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.