Alert archive / North Dakota / Red Flag Warnings in 2021
Red Flag Warning 13, NWS Bismarck, ND
NWS Bismarck, ND issued this red flag warning at Apr 29, 2021, 1:38 PM MDT for 26 counties in North Dakota. It took effect at Apr 30, 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
- Apr 29, 2021, 1:38 PM MDT (19:38 UTC)
- In effect from
- Apr 30, 2021, 11:00 AM MDT
- Expired
- Apr 30, 2021, 8:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Bismarck, ND
All 26 counties
Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Burleigh County, ND, Divide County, ND, Dunn County, ND, Emmons County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Renville County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND
The radar
The Bismarck radar (KBIS), 118 km from the middle of the area, began a volume at 19:42 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, 7.6 hours before the alert went out and 122 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.
742 WWUS83 KBIS 291938 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 238 PM CDT Thu Apr 29 2021 ...RED FLAG WARNING FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA FRIDAY... .Critical fire weather conditions can be expected across western and much of central North Dakota from late Friday morning through early Friday evening. West to southwesterly winds will reach sustained speeds to 25 mph, with gusts up to 35 mph. Minimum relative humidity values are expected to fall to as low as 10 percent. Combined with dry fuels, this will result in critical fire weather conditions. NDZ001>004-009>012-017>022-031>035-040>046-300745- /O.UPG.KBIS.FW.A.0008.210430T1800Z-210501T0100Z/ /O.NEW.KBIS.FW.W.0013.210430T1700Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 238 PM CDT Thu Apr 29 2021 /138 PM MDT Thu Apr 29 2021/ ...RED FLAG WARNING IN EFFECT FROM NOON CDT /11 AM MDT/ TO 9 PM CDT /8 PM MDT/ FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR WESTERN 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, or 11 AM MDT, to 9 PM CDT, or 8 PM MDT, on Friday. This replaces the Fire Weather Watch. * WINDS...West to southwest to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Western 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. && $$ Heinert
6 follow-up statements
166 WWUS83 KBIS 292316 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 616 PM CDT Thu Apr 29 2021 ...RED FLAG WARNING FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA FRIDAY... .Critical fire weather conditions can be expected across western and much of central North Dakota from late Friday morning through early Friday evening. West to southwesterly winds will reach sustained speeds to 25 mph, with gusts up to 35 mph. Minimum relative humidity values are expected to fall to as low as 10 percent. Combined with dry fuels, this will result in critical fire weather conditions. NDZ001>004-009>012-017>022-031>035-040>046-301130- /O.CON.KBIS.FW.W.0013.210430T1700Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 616 PM CDT Thu Apr 29 2021 /516 PM MDT Thu Apr 29 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON CDT /11 AM MDT/ TO 9 PM CDT /8 PM MDT/ FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...West to southwest to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Western and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$ ZH
327 WWUS83 KBIS 300238 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 938 PM CDT Thu Apr 29 2021 ...RED FLAG WARNING FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA FRIDAY... .Critical fire weather conditions can be expected across western and much of central North Dakota from late Friday morning through early Friday evening. West to southwesterly winds will reach sustained speeds to 25 mph, with gusts up to 35 mph. Minimum relative humidity values are expected to fall to as low as 10 percent. Combined with dry fuels, this will result in critical fire weather conditions. NDZ001>004-009>012-017>022-031>035-040>046-301445- /O.CON.KBIS.FW.W.0013.210430T1700Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 938 PM CDT Thu Apr 29 2021 /838 PM MDT Thu Apr 29 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON CDT /11 AM MDT/ TO 9 PM CDT /8 PM MDT/ FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...West to southwest to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Western 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. && $$ ZH
939 WWUS83 KBIS 300815 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 315 AM CDT Fri Apr 30 2021 ...RED FLAG WARNING FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA TODAY INTO THIS EVENING... .Critical fire weather conditions can be expected across western and much of central North Dakota from late this morning into this evening. Winds will be west to southwesterly sustained to 25 mph with gusts to 35 mph. Minimum relative humidity values are expected to fall to as low as 10 percent. Combined with dry fuels, this will result in critical fire weather conditions. NDZ001>004-009>012-017>022-031>035-040>046-010200- /O.CON.KBIS.FW.W.0013.210430T1700Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 315 AM CDT Fri Apr 30 2021 /215 AM MDT Fri Apr 30 2021/ ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON CDT /11 AM MDT/ TODAY TO 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...West to southwest to 25 mph, with gusts to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Western and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$
860 WWUS83 KBIS 301943 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 243 PM CDT Fri Apr 30 2021 ...RED FLAG WARNING FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA THROUGH THIS EVENING... .Critical fire weather conditions are expected across western and much of central North Dakota through this evening. Winds will be west to southwesterly sustained to 25 mph with gusts to 35 mph. Minimum relative humidity values are expected to fall to as low as 10 percent. Combined with dry fuels, this will result in critical fire weather conditions. NDZ001>004-009>012-017>022-031>035-040>046-010200- /O.CON.KBIS.FW.W.0013.000000T0000Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 243 PM CDT Fri Apr 30 2021 /143 PM 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 WESTERN AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...West to southwest to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * AFFECTED AREA...Western 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. && $$ Gale
337 WWUS83 KBIS 302340 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 640 PM CDT Fri Apr 30 2021 ...RED FLAG WARNING FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA THROUGH THIS EVENING... .Critical fire weather conditions are expected across western and much of central North Dakota through this evening. Winds will be west to southwesterly sustained to 25 mph with gusts to 35 mph. Minimum relative humidity values are expected to fall to as low as 10 percent. Combined with dry fuels, this will result in critical fire weather conditions. NDZ001>004-009>012-017>022-031>035-040>046-010200- /O.CON.KBIS.FW.W.0013.000000T0000Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 640 PM CDT Fri Apr 30 2021 /540 PM MDT Fri Apr 30 2021/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT /8 PM MDT/ THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA... * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...As low as 13 percent. * AFFECTED AREA...Western and much of central North Dakota. * IMPACTS...Any fires that ignite will spread rapidly and become difficult to control or suppress. PRECAUTIONARY/PREPAREDNESS ACTIONS... Burn bans may be in effect. Contact local authorities for details. && $$
497 WWUS83 KBIS 010207 RFWBIS URGENT - FIRE WEATHER MESSAGE National Weather Service Bismarck ND 907 PM CDT Fri Apr 30 2021 NDZ001>004-009>012-017>022-031>035-040>046-010315- /O.EXP.KBIS.FW.W.0013.000000T0000Z-210501T0200Z/ Divide-Burke-Renville-Bottineau-Williams-Mountrail-Ward-McHenry- McKenzie-Dunn-Mercer-Oliver-McLean-Sheridan-Golden Valley- Billings-Stark-Morton-Burleigh-Slope-Hettinger-Grant-Bowman-Adams- Sioux-Emmons- 907 PM CDT Fri Apr 30 2021 /807 PM MDT Fri Apr 30 2021/ ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR WESTERN AND MUCH OF CENTRAL NORTH DAKOTA... Winds have diminished to 10 to 15 mph this evening and humidities will continue to climb. Although humidity recovery will be poor, critical fire weather conditions are not expected tonight or Saturday morning. Near critical fire weather conditions are possible again Saturday afternoon. $$
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.