Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 19, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Oct 16, 2021, 2:37 PM MDT for 11 counties in Montana. It took effect at Oct 17, 2021, 12:00 PM MDT. It was in force for 6 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 16, 2021, 2:37 PM MDT (20:37 UTC)
- In effect from
- Oct 17, 2021, 12:00 PM MDT
- Expired
- Oct 17, 2021, 6:00 PM MDT
- In force
- 6 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 20:37 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, 8.6 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
- 1896 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 220 m²/s²
- 0-3 km storm-relative helicity
- 309 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
687 WWUS85 KTFX 162037 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 237 PM MDT Sat Oct 16 2021 MTZ112-114-115-117-171145- /O.UPG.KTFX.FW.A.0013.211017T1800Z-211018T0000Z/ /O.NEW.KTFX.FW.W.0019.211017T1800Z-211018T0000Z/ 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- 237 PM MDT Sat Oct 16 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MDT SUNDAY FOR WARM TEMPERATURES, 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 hot temperatures, gusty winds, and low relative humidity, which is in effect from noon to 6 PM MDT Sunday. * 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. * TEMPERATURES...In the low to mid 70s. * WINDS...South 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...The combination of low humidity and windy west winds could make it difficult to contain any new fire starts. 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. && $$ http://www.weather.gov/greatfalls
3 follow-up statements
656 WWUS85 KTFX 170931 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 331 AM MDT Sun Oct 17 2021 MTZ112-114-115-117-180000- /O.CON.KTFX.FW.W.0019.211017T1800Z-211018T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 331 AM MDT Sun Oct 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * TEMPERATURES...Highs in the upper 60s to mid 70s. * WINDS...South 15 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...The combination of low humidity and windy west winds could make it difficult to contain any new fire starts. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
659 WWUS85 KTFX 172001 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 201 PM MDT Sun Oct 17 2021 MTZ112-114-115-117-180000- /O.CON.KTFX.FW.W.0019.000000T0000Z-211018T0000Z/ 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- 201 PM MDT Sun Oct 17 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING FOR WARM TEMPERATURES, 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. * TEMPERATURES...In the 70s. * WINDS...Southwest 15 to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...Near 10 percent. * IMPACTS...The combination of low humidity and windy west winds could make it difficult to contain any new fire starts. 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. && $$ http://www.weather.gov/greatfalls
570 WWUS85 KTFX 172346 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 546 PM MDT Sun Oct 17 2021 MTZ112-114-115-117-180100- /O.EXP.KTFX.FW.W.0019.000000T0000Z-211018T0000Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 546 PM MDT Sun Oct 17 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING FOR WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 114, 115, AND 117... Winds will begin to decrease as humidity slowly recovers with the loss of daytime heating. The Red Flag Warning will be allowed to expire 6 PM MDT, but continue to be mindful of the dry conditions across the region. $$ 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.