Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 18, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Oct 4, 2021, 9:14 AM MDT for 18 counties in Montana. It took effect at Oct 5, 2021, 12:00 PM MDT. It was in force for 8 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
- Oct 4, 2021, 9:14 AM MDT (15:14 UTC)
- In effect from
- Oct 5, 2021, 12:00 PM MDT
- Expired
- Oct 5, 2021, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Great Falls, MT
Counties Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Fergus County, MT, Gallatin County, MT, Glacier County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Phillips County, MT, Pondera County, MT, Powell County, MT, Teton County, MT, Toole County, MT
The radar
The Great Falls radar (KTFX), 24 km from the middle of the area, began a volume at 15:12 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, 3.2 hours before the alert went out and 37 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
- 2812 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 107 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
599 WWUS85 KTFX 041514 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 914 AM MDT Mon Oct 4 2021 MTZ112-114-050615- /O.NEW.KTFX.FW.W.0018.211005T1800Z-211006T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front- 914 AM MDT Mon Oct 4 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MDT TUESDAY FOR UNSEASONABLY WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112 AND 114... The National Weather Service in Great Falls has issued a Red Flag Warning for unseasonably warm temperatures, gusty winds, and low relative humidity, which is in effect from noon to 6 PM MDT Tuesday. * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty and Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front. * TEMPERATURES...In the low 80s. * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Unseasonably warm temperatures, low humidity, and gusty winds may allow fires to grow and spread rapidly. 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. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
5 follow-up statements
014 WWUS85 KTFX 050252 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 852 PM MDT Mon Oct 4 2021 MTZ112-114-051200- /O.CON.KTFX.FW.W.0018.211005T1800Z-211006T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front- 852 PM MDT Mon Oct 4 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MDT TUESDAY FOR UNSEASONABLY WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112 AND 114... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty and Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front. * TEMPERATURES...In the mid 70s to low 80s. * WINDS...Southwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Unseasonably warm temperatures, low humidity, and gusty winds may allow fires to grow and spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
804 WWUS85 KTFX 050911 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 311 AM MDT Tue Oct 5 2021 MTZ112-114-060000- /O.CON.KTFX.FW.W.0018.211005T1800Z-211006T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front- 311 AM MDT Tue Oct 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR UNSEASONABLY WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112 AND 114... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty and Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front. * TEMPERATURES...In the upper 70s to mid 80s. * WINDS...Southwest 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Unseasonably warm temperatures, low humidity, and gusty winds may allow fires to grow and spread rapidly. 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. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
038 WWUS85 KTFX 051327 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 727 AM MDT Tue Oct 5 2021 MTZ113-115>118-060200- /O.EXB.KTFX.FW.W.0018.211005T1800Z-211006T0200Z/ Hill and Blaine Counties-Chouteau and Fergus Counties- Lincoln Ranger District of the Helena National Forest- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 727 AM MDT Tue Oct 5 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR UNSEASONABLY WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 113, 115, 116, 117, AND 118... The National Weather Service in Great Falls has issued a Red Flag Warning for unseasonably warm temperatures, which is in effect from Noon today to 8 PM MDT this evening. * AFFECTED AREA...Hill and Blaine Counties, Chouteau and Fergus Counties, Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * TEMPERATURES...In the mid 70s to mid 80s. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 7 percent. * IMPACTS...Unseasonably warm temperatures, very low humidity, and gusty winds may allow fires to grow and spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ MTZ112-114-060200- /O.EXT.KTFX.FW.W.0018.211005T1800Z-211006T0200Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front- 727 AM MDT Tue Oct 5 2021 ...RED FLAG WARNING NOW IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR UNSEASONABLY WARM TEMPERATURES FOR FIRE WEATHER ZONES 112 AND 114... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty and Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front. * TEMPERATURES...In the mid 70s to mid 80s. * WINDS...Southwest 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Unseasonably warm temperatures, low humidity, and gusty winds may allow fires to grow and spread rapidly. 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. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
798 WWUS85 KTFX 052047 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 247 PM MDT Tue Oct 5 2021 MTZ112>118-060200- /O.CON.KTFX.FW.W.0018.000000T0000Z-211006T0200Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Hill and Blaine Counties- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Lincoln Ranger District of the Helena National Forest- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 247 PM MDT Tue Oct 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR UNSEASONABLY WARM TEMPERATURES FOR FIRE WEATHER ZONES 112, 113, 114, 115, 116, 117, AND 118... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties, Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * TEMPERATURES...Near 80. * WINDS...Southwest 15 to 25 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...Unseasonably warm temperatures, very low humidity, and gusty winds may allow fires to grow and spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
421 WWUS85 KTFX 060155 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 755 PM MDT Tue Oct 5 2021 MTZ112>118-060300- /O.EXP.KTFX.FW.W.0018.000000T0000Z-211006T0200Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Hill and Blaine Counties- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Lincoln Ranger District of the Helena National Forest- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 755 PM MDT Tue Oct 5 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR UNSEASONABLY WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 113, 114, 115, 116, 117, AND 118... Winds have diminished and RH levels are increasing across the warned area. The Red Flag Warning will be allowed to expire at 8 PM MDT this evening. $$ http://www.weather.gov/greatfalls
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.