Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 20, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Nov 15, 2021, 2:20 AM MST for 8 counties in Montana. It took effect at Nov 15, 2021, 11:00 AM MST. It was in force for 8 hr. 13 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 15, 2021, 2:20 AM MST (09:20 UTC)
- In effect from
- Nov 15, 2021, 11:00 AM MST
- Expired
- Nov 15, 2021, 7:00 PM MST
- In force
- 8 hr
- Issued by
- NWS Great Falls, MT
Counties Cascade County, MT, Chouteau County, MT, Fergus County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Meagher County, MT, Pondera County, MT, Teton County, MT
The radar
The Great Falls radar (KTFX), 20 km from the middle of the area, began a volume at 09:17 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 15, 11:00 AM MST | NON-TSTM WND GST 55 | Bynum, MT | MESONET STATION PRKMT BYNUM (MCSCN). |
| Nov 15, 12:45 PM MST | NON-TSTM WND GST 77 | 14 W Bynum, MT | MESONET STATION DELMT DELLWO (MCSCN). |
| Nov 15, 1:00 PM MST | NON-TSTM WND GST 79 | 14 W Bynum, MT | MESONET STATION DELMT DELLWO (MCSCN). |
| Nov 15, 1:45 PM MST | NON-TSTM WND GST 82 | 14 W Bynum, MT | MESONET STATION DELMT DELLWO (MCSCN). |
| Nov 15, 2:00 PM MST | NON-TSTM WND GST 55 | 5 Ese Pendroy, MT | MESONET STATION RICMT RICE RIDGE. |
| Nov 15, 2:09 PM MST | NON-TSTM WND GST 50 | 18 Wsw Bynum, MT | MESONET STATION GSNM8 GLEASON RAWS. |
| Nov 15, 3:14 PM MST | NON-TSTM WND GST 59 | 2 Nw Pendroy, MT | MESONET STATION MTPND PENDROY (MT DOT). |
| Nov 15, 3:25 PM MST | NON-TSTM WND GST 60 | 1 Nne Choteau, MT | MESONET STATION KCII CHOTEAU (GTFWFO). |
| Nov 15, 5:00 PM MST | NON-TSTM WND GST 68 | 5 Ese Pendroy, MT | MESONET STATION RICMT RICE RIDGE. |
| Nov 15, 5:00 PM MST | NON-TSTM WND GST 70 | 14 W Bynum, MT | MESONET STATION DELMT DELLWO (MCSCN). |
| Nov 15, 6:55 PM MST | NON-TSTM WND GST 61 | 1 Nne Choteau, MT | MESONET STATION KCII CHOTEAU (GTFWFO). |
| Nov 15, 7:00 PM MST | NON-TSTM WND DMG | 5 Sse Choteau, MT | TIME AND DATE ESTIMATED FROM STRONGEST WINDS AT NEARBY CHOTEAU AIRPORT. LOCATION ESTIMATED BY REPORTING PERSON. WIND PEELED A WELL-CONSTRUCTED (AS DESCRIBED BY SPOTTER) SOUTH-FACING METAL BILLBOARD FROM ITS WEST SIDE LIKE A SARDINE CAN (AGAIN, AS DESCRIBED BY |
| Nov 15, 7:00 PM MST | NON-TSTM WND DMG | Fairfield, MT | TIME ESTIMATED. PUBLIC REPORTED THAT STRONG WINDS KNOCKED OVER A WOODEN SIGN IN FRONT OF HIS BUILDING. HOWEVER, HE REPORTED THAT NO TREES OR POWER LINES WERE KNOCKED DOWN. |
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 00:00Z, 9.3 hours before the alert went out and 40 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
- 1995 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 320 m²/s²
- 0-3 km storm-relative helicity
- 566 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
993 WWUS85 KTFX 150920 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 220 AM MST Mon Nov 15 2021 MTZ114-115-117-152300- /O.UPG.KTFX.FW.A.0014.211115T1800Z-211115T2300Z/ /O.NEW.KTFX.FW.W.0020.211115T1800Z-211115T2300Z/ Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 220 AM MST Mon Nov 15 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM THIS MORNING TO 4 PM MST THIS AFTERNOON FOR WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 114, 115, AND 117... The National Weather Service in Great Falls has issued a Red Flag Warning for warm temperatures, gusty winds, and low relative humidity, which is in effect from 11 AM this morning to 4 PM MST this afternoon. The Fire Weather Watch has been replaced by this warning. * AFFECTED AREA...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 upper 50s and 60s. * WINDS...Southwest 35 to 45 mph with gusts up to 70 mph. Localized gusts in excess of 80 mph at times. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...The combination of strong winds and low humidity could make any new fire starts difficult to contain. 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. && $$ http://www.weather.gov/greatfalls
2 follow-up statements
741 WWUS85 KTFX 152109 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 209 PM MST Mon Nov 15 2021 MTZ114-115-117-160200- /O.EXT.KTFX.FW.W.0020.000000T0000Z-211116T0200Z/ Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 209 PM MST Mon Nov 15 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 7 PM MST THIS EVENING FOR WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 114, 115, AND 117... * AFFECTED AREA...Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * TEMPERATURES...In the upper 50s and 60s. * WINDS...Southwest 35 to 45 mph with gusts up to 70 mph. Localized gusts in excess of 80 mph at times. * RELATIVE HUMIDITY...As low as 14 percent. * IMPACTS...The combination of strong winds and low humidity could make any new fire starts difficult to contain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
809 WWUS85 KTFX 160137 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 637 PM MST Mon Nov 15 2021 MTZ114-115-117-160245- /O.EXP.KTFX.FW.W.0020.000000T0000Z-211116T0200Z/ Lewis and Clark National Forest Rocky Mountain District- Rocky Mountain Front-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- 637 PM MST Mon Nov 15 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MST THIS EVENING FOR LOW HUMIDITY AND GUSTY WINDS FOR FIRE WEATHER ZONES 114, 115, AND 117... Expect increasing humidity and cooler temperatures to move into the region tonight as a strong cold front moves through the region. Wind speeds will remain very strong through Tuesday though. $$ 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.