Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 9, NWS Billings, MT
NWS Billings, MT issued this red flag warning at Jul 22, 2021, 1:40 PM MDT for 8 counties in Montana. It took effect at Jul 23, 2021, 12:00 PM 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
- Jul 22, 2021, 1:40 PM MDT (19:40 UTC)
- In effect from
- Jul 23, 2021, 12:00 PM MDT
- Expired
- Jul 23, 2021, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Billings, MT
Counties Gallatin County, MT, Golden Valley County, MT, Madison County, MT, Musselshell County, MT, Park County, MT, Stillwater County, MT, Sweet Grass County, MT, Wheatland County, MT
The radar
The Billings radar (KBLX), 112 km from the middle of the area, began a volume at 19:40 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
Great_falls, MT (KTFX), launched 12:00Z, 7.7 hours before the alert went out and 179 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
- 160 J/kg
- Mixed-layer CIN
- -256 J/kg
- Mixed-layer LCL
- 2029 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
273 WWUS85 KBYZ 221940 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 140 PM MDT Thu Jul 22 2021 MTZ123>125-127-231945- /O.UPG.KBYZ.FW.A.0007.210723T1800Z-210724T0600Z/ /O.NEW.KBYZ.FW.W.0009.210723T1800Z-210724T0300Z/ Gallatin National Forest-Wheatland County/Sweet Grass County- Stillwater County-Golden Valley County/Musselshell county- 140 PM MDT Thu Jul 22 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT FRIDAY... The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from noon to 9 PM MDT Friday. The Fire Weather Watch is no longer in effect. * IMPACTS: Low humidities, hot temperatures, and strong gusty winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...127. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Park...Stillwater...Sweet Grass. In Southwest MT...Gallatin. * WIND: Northwest 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: In the low to mid 90s. 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. && $$ http://weather.gov/Billings
3 follow-up statements
948 WWUS85 KBYZ 230819 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 219 AM MDT Fri Jul 23 2021 MTZ123>125-127-240300- /O.CON.KBYZ.FW.W.0009.210723T1800Z-210724T0300Z/ Gallatin National Forest-Wheatland County/Sweet Grass County- Stillwater County-Golden Valley County/Musselshell county- 219 AM MDT Fri Jul 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING... * IMPACTS: Low humidities, hot temperatures, and strong gusty winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...127. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Park...Stillwater...Sweet Grass. In Southwest MT...Gallatin. * WIND: Northwest 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: In the low to mid 90s. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ http://weather.gov/Billings
961 WWUS85 KBYZ 231930 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 130 PM MDT Fri Jul 23 2021 MTZ123>125-127-240300- /O.CON.KBYZ.FW.W.0009.000000T0000Z-210724T0300Z/ Gallatin National Forest-Wheatland County/Sweet Grass County- Stillwater County-Golden Valley County/Musselshell county- 130 PM MDT Fri Jul 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING... * IMPACTS: Low humidities, hot temperatures, and strong gusty winds will create erratic fire behavior and new fire starts. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...127. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Park...Stillwater...Sweet Grass. In Southwest MT...Gallatin. * WIND: Northwest 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 10 percent. * TEMPERATURES: In the low to mid 90s. 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. && $$ http://weather.gov/Billings
071 WWUS85 KBYZ 240256 RFWBYZ URGENT - FIRE WEATHER MESSAGE National Weather Service Billings MT 856 PM MDT Fri Jul 23 2021 MTZ123>125-127-240400- /O.EXP.KBYZ.FW.W.0009.000000T0000Z-210724T0300Z/ Gallatin National Forest-Wheatland County/Sweet Grass County- Stillwater County-Golden Valley County/Musselshell county- 856 PM MDT Fri Jul 23 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... Winds have been decreasing over the area this evening, so will let the warning expire. $$ http://weather.gov/Billings
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 1:41 PM MDT | Special Weather Statement | BYZ | Powder River | 49 min |
| Jul 22, 1:46 PM MDT | Special Weather Statement | BYZ | Custer | 44 min |
| Jul 22, 2:20 PM MDT | Special Weather Statement | BYZ | Carter, Fallon | 55 min |
| Jul 22, 2:24 PM MDT | Special Weather Statement | BYZ | Park | 81 min |
| Jul 22, 3:11 PM MDT | Special Weather Statement | BYZ | Carter, Fallon | 34 min |
| Jul 22, 3:28 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 47 min |
Nearby
Red Flag Warnings in Montana, 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.