Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 6, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Jul 11, 2021, 12:33 AM MDT for 18 counties in Montana. It took effect at Jul 11, 2021, 12:00 PM MDT. It was in force for 9 hr. 28 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
- Jul 11, 2021, 12:33 AM MDT (06:33 UTC)
- In effect from
- Jul 11, 2021, 12:00 PM MDT
- Expired
- Jul 11, 2021, 9:00 PM MDT
- In force
- 9 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 06:34 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 |
|---|---|---|---|
| Jul 11, 3:23 PM MDT | TSTM WND GST 60 | 3 Sw Cut Bank, MT | ASOS STATION KCTB CUT BANK AIRPORT. SUSTAINED WIND 41MPH AT TIME OF GUST. |
| Jul 11, 3:24 PM MDT | TSTM WND DMG | Cut Bank, MT | POWER LINES DOWN IN CUT BANK WITH A HIGH NUMBER OF POWER OUTAGES. ALSO REPORTED A TREE WAS DOWNED. |
| Jul 11, 3:29 PM MDT | TSTM WND GST 63 | 3 Sw Cut Bank, MT | ASOS STATION KCTB CUT BANK AIRPORT. |
| Jul 11, 3:36 PM MDT | TSTM WND GST 56 | 6 Nnw Sunburst, MT | MESONET STATION MTSWT SWEETGRASS (MT DOT). |
| Jul 11, 4:00 PM MDT | TSTM WND GST 60 | Toole County Airport, MT | MEASURED AT TOOLE COUNTY AIRPORT, VIA AMBIENT WEATHER. |
| Jul 11, 4:16 PM MDT | TSTM WND GST 53 | Galata, MT | MESONET STATION DW9605 GALATA. |
| Jul 11, 4:30 PM MDT | TSTM WND DMG | 8 Ese Lothair, MT | SWING SET BLOWN AWAY, MANY TREES HAD SIGNIFICANT NUMBER OF LIMBS BLOWN OFF. |
| Jul 11, 4:34 PM MDT | TSTM WND GST 64 | 10 Nne Galata, MT | |
| Jul 11, 4:50 PM MDT | TSTM WND GST 55 | Inverness, MT | PEAK GUST OVER LAST 30 MIN AS MEASURED BY MTINV. |
| Jul 11, 4:58 PM MDT | TSTM WND GST 58 | 13 S Inverness, MT | VIA AMBIENT WEATHER MESONET. |
| Jul 11, 4:59 PM MDT | TSTM WND GST 58 | 10 N Joplin, MT | |
| Jul 11, 5:00 PM MDT | TSTM WND GST 65 | 11 S Rudyard, MT | VIA AMBIENT WEATHER MESONET. |
| Jul 11, 5:05 PM MDT | TSTM WND GST 62 | 2 E Inverness, MT | |
| Jul 11, 5:14 PM MDT | TSTM WND GST 77 | 13 W Big Sandy, MT | VIA AMBIENT WEATHER MESONET. |
| Jul 11, 5:20 PM MDT | TSTM WND GST 61 | 1 N Loma, MT | |
| Jul 11, 5:24 PM MDT | TSTM WND DMG | Verona, MT | POWERLINES DOWN ON US 87 NEAR VERONA. |
| Jul 11, 5:30 PM MDT | TSTM WND DMG | 1 Sw Big Sandy, MT | SEMI BLOWN OF HIGHWAY 87, NEAR MILE MARKER 78. POWER LINES BLOWN DOWN IN THE AREA. UNKNOWN NUMBER OF INJURIES. REPORT VIA MT HIGHWAY PATROL. TIME OF EVENT IS ESTIMATED. |
| Jul 11, 5:30 PM MDT | TSTM WND GST 55 | 1 Ne Fort Benton, MT | AWOS STATION 79S9 FORT BENTON APT. |
| Jul 11, 5:31 PM MDT | NON-TSTM WND GST 63 | 14 Sw Simms, MT | MILITARY SITE MEASURED NON CONVECTIVE GUST OF 63 MPH WITH SOUTHWARD MOVING SYNOPTIC BOUNDARY. |
| Jul 11, 5:41 PM MDT | TSTM WND GST 66 | Havre County Airport, MT | MEASURED AT KHVR. |
| Jul 11, 5:45 PM MDT | TSTM WND GST 59 | 18 E Fort Benton, MT | |
| Jul 11, 6:00 PM MDT | TSTM WND GST 62 | 7 Wsw Havre, MT | MEASURED BY SITE MTM06. |
| Jul 11, 6:01 PM MDT | TSTM WND GST 55 | 5 Ssw Hays, MT | |
| Jul 11, 6:23 PM MDT | TSTM WND GST 66 | 1 Wnw Great Falls, MT | DELAYED REPORT. |
| Jul 11, 6:52 PM MDT | TSTM WND GST 54 | 7 Ese Hilger, MT | MESONET STATION JPKM8 JUDITH PEAK RAWS. |
| Jul 11, 7:15 PM MDT | NON-TSTM WND GST 56 | 2 Wnw Malta, MT | AWOS STATION KM75 MALTA. |
| Jul 11, 7:18 PM MDT | TSTM WND GST 57 | 13 S Fort Belknap, MT | MESONET STATION FBLM8 FORT BELKNAP RAWS. |
| Jul 11, 7:20 PM MDT | NON-TSTM WND GST 55 | 1 Ese Zortman, MT | TIME ESTIMATED FROM RADAR. MESONET STATION ALDM8 ZORTMAN 1E. |
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, 6.6 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
- 4077 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 52 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
610 WWUS85 KTFX 110633 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 1233 AM MDT Sun Jul 11 2021 MTZ112>118-112200- /O.NEW.KTFX.FW.W.0006.210711T1800Z-210712T0300Z/ 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- 1233 AM MDT Sun Jul 11 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR HOT TEMPERATURES, GUSTY WINDS, LOW RELATIVE HUMIDITY AND A WIND SHIFT FOR FIRE WEATHER ZONES 112, 113, 114, 115, 116, 117, AND 118... The National Weather Service in Great Falls has issued a Red Flag Warning for hot temperatures, gusty winds, low relative humidity and a wind shift which is in effect from Noon today to 9 PM MDT this evening. * 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...90 to 100 degrees. * WINDS...West 15 to 25 mph with gusts around 35 mph, becoming northwest winds this evening. * RELATIVE HUMIDITY...As low as 8 percent. * IMPACTS...The hot temperatures combined with low humidity and gust winds could create difficult conditions on any fire today. 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
660 WWUS85 KTFX 111955 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 155 PM MDT Sun Jul 11 2021 MTZ112>118-120300- /O.CON.KTFX.FW.W.0006.000000T0000Z-210712T0300Z/ 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- 155 PM MDT Sun Jul 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR HOT TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY AND A WINDS SHIFT 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...In the mid 80s to low 90s. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph...shifting to the north tonight. A period of gusty north winds is likely early this evening across north-central Montana due to a Canadian frontal passage and possible thunderstorm outflow. * RELATIVE HUMIDITY...As low as 11 percent. * IMPACTS...The hot temperatures combined with low humidity and gust winds could create difficult conditions on any fire today. In addition, isolated thunderstorms are possible across areas south of the Elkhorns and Big Belts as well as near the Canadian border this evening. 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
884 WWUS85 KTFX 120302 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 902 PM MDT Sun Jul 11 2021 MTZ112>118-120415- /O.EXP.KTFX.FW.W.0006.000000T0000Z-210712T0300Z/ 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- 902 PM MDT Sun Jul 11 2021 ...RED FLAG WARNING HAS EXPIRED FOR FIRE WEATHER ZONES 112, 113, 114, 115, 116, 117, AND 118... $$ 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 |
|---|---|---|---|---|
| Jul 11, 2:18 PM MDT | Special Weather Statement | TFX | Glacier | 42 min |
| Jul 11, 2:28 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 50 min |
| Jul 11, 2:58 PM MDT | Special Weather Statement | TFX | Glacier | 32 min |
| Jul 11, 3:03 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Toole | 42 min |
| Jul 11, 3:40 PM MDT | Severe Thunderstorm Warning | TFX | Toole | 50 min |
| Jul 11, 4:18 PM MDT | Severe Thunderstorm Warning | TFX | Liberty, Toole | 27 min |
| Jul 11, 4:36 PM MDT | Special Weather Statement | TFX | Pondera | 24 min |
| Jul 11, 4:47 PM MDT | Special Weather Statement | TFX | Chouteau | 28 min |
| Jul 11, 5:05 PM MDT | Special Weather Statement | TFX | Pondera | 25 min |
| Jul 11, 5:11 PM MDT | Severe Thunderstorm Warning | TFX | Chouteau, Hill | 49 min |
| Jul 11, 5:55 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Chouteau, Hill | 65 min |
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.