Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 15, NWS Missoula, MT
NWS Missoula, MT issued this red flag warning at Sep 4, 2021, 12:51 PM MDT for 7 counties in Montana. It took effect at Sep 5, 2021, 2:00 PM MDT. It was in force for 7 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
- Sep 4, 2021, 12:51 PM MDT (18:51 UTC)
- In effect from
- Sep 5, 2021, 2:00 PM MDT
- Expired
- Sep 5, 2021, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- NWS Missoula, MT
Counties Beaverhead County, MT, Deer Lodge County, MT, Granite County, MT, Jefferson County, MT, Madison County, MT, Powell County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 154 km from the middle of the area, began a volume at 18:55 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, 6.9 hours before the alert went out and 231 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
- 2289 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- -10 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
843 WWUS85 KMSO 041851 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 1251 PM MDT Sat Sep 4 2021 MTZ110-111-051900- /O.NEW.KMSO.FW.W.0015.210905T2000Z-210906T0300Z/ Deerlodge/West Beaverhead-East Beaverhead- 1251 PM MDT Sat Sep 4 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 9 PM MDT SUNDAY... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: A combination of gusty winds and low humidities will produce critical fire weather conditions from the afternoon through early evening, especially east of the Continental Divide. * Winds: West winds 20-25 mph with gusts in higher terrain up to 35 mph. * Minimum humidities: 8-15 percent && $$
2 follow-up statements
224 WWUS85 KMSO 051630 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 1030 AM MDT Sun Sep 5 2021 MTZ110-111-061630- /O.NEW.KMSO.FW.A.0006.210906T2000Z-210907T0300Z/ /O.CON.KMSO.FW.W.0015.210905T2000Z-210906T0300Z/ Deerlodge/West Beaverhead-East Beaverhead- 1030 AM MDT Sun Sep 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM MDT THIS EVENING... ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH MONDAY EVENING... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: A combination of gusty winds and low humidities will produce critical fire weather conditions from this afternoon through early evening, especially east of the Continental Divide. Similar critical fire weather conditions may redevelop on Monday as well. * Winds: West winds 20-25 mph with gusts in higher terrain up to 35 mph. * Minimum humidities: 8-15 percent && $$
999 WWUS85 KMSO 060235 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 835 PM MDT Sun Sep 5 2021 MTZ110-111-070300- /O.EXP.KMSO.FW.W.0015.000000T0000Z-210906T0300Z/ /O.UPG.KMSO.FW.A.0006.210906T2000Z-210907T0300Z/ /O.NEW.KMSO.FW.W.0016.210906T2000Z-210907T0300Z/ Deerlodge/West Beaverhead-East Beaverhead- 835 PM MDT Sun Sep 5 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 9 PM MDT MONDAY... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... The Fire Weather Watch is no longer in effect. * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: For Tonight: Critical fire weather conditions will diminish overnight as winds decrease with some Rh recovery. For Monday: A combination of gusty winds and low humidities will produce critical fire weather conditions once again Monday afternoon through early evening, especially east of the Continental Divide. * Winds: West winds 20-25 mph with gusts in higher terrain up to 35 mph. * Minimum humidities: 9-16 percent && $$
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.