Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 17, NWS Missoula, MT
NWS Missoula, MT issued this red flag warning at Sep 7, 2021, 12:16 PM MDT for 8 counties in Montana. It took effect at Sep 8, 2021, 1:00 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 7, 2021, 12:16 PM MDT (18:16 UTC)
- In effect from
- Sep 8, 2021, 1:00 PM MDT
- Expired
- Sep 8, 2021, 8:00 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, Ravalli County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 144 km from the middle of the area, began a volume at 18:20 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, 6.3 hours before the alert went out and 240 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
- 2669 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 128 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
805 WWUS85 KMSO 071816 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 1216 PM MDT Tue Sep 7 2021 MTZ110-111-081830- /O.UPG.KMSO.FW.A.0007.210908T1900Z-210909T0200Z/ /O.NEW.KMSO.FW.W.0017.210908T1900Z-210909T0200Z/ Deerlodge/West Beaverhead-East Beaverhead- 1216 PM MDT Tue Sep 7 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM TO 8 PM MDT WEDNESDAY... The Fire Weather Watch is no longer in effect. * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: The combination of gusty winds, low humidity, and high Haines will produce critical fire weather conditions on Wednesday. * Winds: West 15 to 25 mph with gusts of 25 to 35 mph. * Minimum humidities: 7 to 13 percent. * Haines Index : 6 high. && $$ IDZ103-081830- /O.NEW.KMSO.FW.A.0008.210908T1900Z-210909T0200Z/ Clearwater/Nez Perce- 1116 AM PDT Tue Sep 7 2021 ...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING... * Affected area: Fire Zone 103 (Clearwater/Nez Perce). * Impacts: The combination of gusty winds, low humidity, and high Haines may produce critical fire weather conditions on Wednesday. * Winds: Southwest 10 to 20 mph with gusts of 25 to 30 mph. * Minimum humidities: 10 to 15 percent. * Haines Index : 6 high. && $$ MTZ109-081830- /O.NEW.KMSO.FW.A.0008.210908T1900Z-210909T0200Z/ Bitterroot- 1216 PM MDT Tue Sep 7 2021 ...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING... * Affected area: Fire Zone 109 (Bitterroot). * Impacts: The combination of gusty winds, low humidity, and high Haines may produce critical fire weather conditions on Wednesday. * Winds: Southwest 10 to 20 mph with gusts of 25 to 30 mph. * Minimum humidities: 10 to 15 percent. * Haines Index : 6 high. && $$
1 follow-up statement
639 WWUS85 KMSO 080927 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 327 AM MDT Wed Sep 8 2021 IDZ103-081030- /O.CAN.KMSO.FW.A.0008.210908T1900Z-210909T0200Z/ Clearwater/Nez Perce- 227 AM PDT Wed Sep 8 2021 ...FIRE WEATHER WATCH IS CANCELLED... The National Weather Service in Missoula has cancelled the Fire Weather Watch. The extent of critical fire weather conditions will be localized to the Red River District of the Nez Perce NF this afternoon and evening; therefore, the fire weather watch has been cancelled. $$ MTZ109-090200- /O.UPG.KMSO.FW.A.0008.210908T1900Z-210909T0200Z/ /O.EXA.KMSO.FW.W.0017.210908T1900Z-210909T0200Z/ Bitterroot- 327 AM MDT Wed Sep 8 2021 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING... * Affected area: Fire Zone 109 (Bitterroot). * Impacts: The combination of gusty winds, low humidity, and high Haines will produce critical fire weather conditions on Wednesday. * Winds: Southwest 15 to 20 mph with gusts of 25 to 35 mph. * Minimum humidities: 10 to 15 percent. * Haines Index : 6 high. && $$ MTZ110-111-090200- /O.CON.KMSO.FW.W.0017.210908T1900Z-210909T0200Z/ Deerlodge/West Beaverhead-East Beaverhead- 327 AM MDT Wed Sep 8 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO 8 PM MDT THIS EVENING... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: The combination of gusty winds, low humidity, and high Haines will produce critical fire weather conditions on Wednesday. * Winds: West 15 to 25 mph with gusts of 25 to 35 mph. * Minimum humidities: 7 to 13 percent. * Haines Index : 6 high. && $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 3:51 AM MDT | Fire Weather Watch | MSO | Beaverhead, Deer Lodge, Granite, Jefferson, Madison, Powell and 1 more | 8 hr |
| Sep 7, 12:16 PM MDT | Fire Weather Watch | MSO | Ravalli | 15 hr |
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.