Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 21, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Nov 21, 2021, 10:35 AM MST for 11 counties in Montana. It took effect at Nov 22, 2021, 7:00 AM MST. It was in force for 10 hr. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Nov 21, 2021, 10:35 AM MST (17:35 UTC)
- In effect from
- Nov 22, 2021, 7:00 AM MST
- Expired
- Nov 22, 2021, 5:00 PM MST
- In force
- 10 hr
- Issued by
- NWS Great Falls, MT
Counties Cascade County, MT, Chouteau County, MT, Fergus County, MT, Glacier County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Liberty County, MT, Meagher County, MT, Pondera County, MT, Teton County, MT, Toole County, MT
The radar
The Great Falls radar (KTFX), 32 km from the middle of the area, began a volume at 17:34 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Nov 22, 2:28 PM MST | NON-TSTM WND GST 38 | 5 Wsw Great Falls, MT | ASOS STATION KGTF GREAT FALLS AIRPORT. |
| Nov 22, 3:00 PM MST | NON-TSTM WND GST 56 | 3 Sw Cut Bank, MT | ASOS STATION KCTB CUT BANK AIRPORT. PEAK WIND GUST FOR NOVEMBER 22ND. |
| Nov 22, 4:45 PM MST | NON-TSTM WND GST 60 | 17 N Joplin, MT | MESONET STATION GW0625 JOPLIN 17 NORTH. PEAK WIND GUST FOR NOVEMBER 22ND. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 5.6 hours before the alert went out and 64 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
- 1824 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 124 m²/s²
- 0-3 km storm-relative helicity
- 88 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
776 WWUS85 KTFX 211735 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 1035 AM MST Sun Nov 21 2021 MTZ112-114-115-117-221200- /O.UPG.KTFX.FW.A.0015.211122T1800Z-211123T0000Z/ /O.NEW.KTFX.FW.W.0021.211122T1800Z-211123T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 1035 AM MST Sun Nov 21 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 5 PM MST MONDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... The National Weather Service in Great Falls has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 11 AM to 5 PM MST Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * WINDS...Southwest 20 to 30 mph, with gusts near 50 mph. * RELATIVE HUMIDITY...Around 15 percent. * IMPACTS...Fire ignitions could spread rapidly in rangeland areas where receptive fuels are available. 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. && $$ http://www.weather.gov/greatfalls
4 follow-up statements
579 WWUS85 KTFX 221034 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 334 AM MST Mon Nov 22 2021 MTZ112-114-115-117-230000- /O.CON.KTFX.FW.W.0021.211122T1800Z-211123T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 334 AM MST Mon Nov 22 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Fire ignitions could spread rapidly in rangeland areas where receptive fuels are available. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
552 WWUS85 KTFX 221314 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 614 AM MST Mon Nov 22 2021 MTZ112-114-115-117-222300- /O.EXT.KTFX.FW.W.0021.211122T1400Z-211123T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 614 AM MST Mon Nov 22 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Fire ignitions could spread rapidly in rangeland areas where receptive fuels are available. 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. && $$ http://www.weather.gov/greatfalls
188 WWUS85 KTFX 222026 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 126 PM MST Mon Nov 22 2021 MTZ112-114-115-117-230000- /O.CON.KTFX.FW.W.0021.000000T0000Z-211123T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 126 PM MST Mon Nov 22 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * WINDS...Southwest 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...Fire ignitions could spread rapidly in rangeland areas where receptive fuels are available. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
691 WWUS85 KTFX 222355 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 455 PM MST Mon Nov 22 2021 MTZ112-114-115-117-230100- /O.EXP.KTFX.FW.W.0021.000000T0000Z-211123T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 455 PM MST Mon Nov 22 2021 ...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... Gusty southwest winds have decreased but humidity remains very low into early this evening. Expect slow humidity improvement late this evening with cooler temperatures and better humidity recovery developing overnight as a cooler Pacific airmass moves into the region. $$ http://www.weather.gov/greatfalls
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 21, 2:41 AM MST | Fire Weather Watch | TFX | Cascade, Chouteau, Fergus, Glacier, Judith Basin, Lewis and Clark and 5 more | 8 hr |
| Nov 21, 11:57 AM MST | Winter Weather Advisory | TFX | 62 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.