Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 4, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Jun 14, 2021, 9:56 AM MDT for 12 counties in Montana. It took effect at Jun 15, 2021, 9:00 AM MDT. It was in force for 15 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
- Jun 14, 2021, 9:56 AM MDT (15:56 UTC)
- In effect from
- Jun 15, 2021, 9:00 AM MDT
- Expired
- Jun 16, 2021, 12:00 AM MDT
- In force
- 15 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, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Meagher County, MT, Phillips County, MT
The radar
The Great Falls radar (KTFX), 70 km from the middle of the area, began a volume at 15:54 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 |
|---|---|---|---|
| Jun 15, 4:15 PM MDT | NON-TSTM WND GST 51 | 1 Wnw West Yellowstone, MT | AWOS STATION KWYS W YELLOWSTONE AWOS. |
| Jun 15, 6:04 PM MDT | NON-TSTM WND GST 57 | 7 Ssw Big Sky, MT | MESONET STATION YLWM8 YELLOW MULE RAWS. |
| Jun 15, 7:54 PM MDT | NON-TSTM WND GST 50 | 8 W Townsend, MT | MESONET STATION EKHM8 ELKHORN RAWS - 8 W TOWNSEND. |
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, 3.9 hours before the alert went out and 28 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
- 13 J/kg
- Mixed-layer CIN
- -695 J/kg
- Mixed-layer LCL
- 2646 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 277 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
354 WWUS85 KTFX 141556 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 956 AM MDT Mon Jun 14 2021 MTZ113-115-117-118-151100- /O.NEW.KTFX.FW.W.0004.210615T1500Z-210616T0600Z/ Hill and Blaine Counties-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 956 AM MDT Mon Jun 14 2021 ...RED FLAG WARNING IN EFFECT FROM 9 AM TUESDAY TO MIDNIGHT MDT TUESDAY NIGHT FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 113, 115, 117, AND 118... The National Weather Service in Great Falls has issued a Red Flag Warning for gusty winds and low relative, which is in effect from 9 AM Tuesday to midnight MDT Tuesday night. * AFFECTED AREA...Hill and Blaine Counties, Chouteau and Fergus Counties, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * TEMPERATURES...In the upper 80s to near 100. * WINDS...Zones 113 and 115 South to southeast winds 15 to 25 mph with gusts up to 35 mph will shift to the west in the afternoon. Zones 117 and 118 Southwest winds 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 10 percent. 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. && $$ http://www.weather.gov/greatfalls
3 follow-up statements
453 WWUS85 KTFX 150945 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 345 AM MDT Tue Jun 15 2021 MTZ113-115-117-118-152200- /O.CON.KTFX.FW.W.0004.210615T1500Z-210616T0600Z/ Hill and Blaine Counties-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 345 AM MDT Tue Jun 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM THIS MORNING TO MIDNIGHT MDT TONIGHT FOR HOT TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 113, 115, 117, AND 118... * AFFECTED AREA...Hill and Blaine Counties, Chouteau and Fergus Counties, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * TEMPERATURES...In the 90s to near 100. * WINDS...Zones 113 and 115 South to southeast winds 15 to 25 mph with gusts up to 35 mph will shift to the west in the afternoon. Zones 117 and 118 Southwest winds 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 10 percent. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
624 WWUS85 KTFX 152041 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 241 PM MDT Tue Jun 15 2021 MTZ113-115-117-118-160600- /O.CON.KTFX.FW.W.0004.000000T0000Z-210616T0600Z/ Hill and Blaine Counties-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 241 PM MDT Tue Jun 15 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR HOT TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 113, 115, 117, AND 118... * AFFECTED AREA...Hill and Blaine Counties, Chouteau and Fergus Counties, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * TEMPERATURES...In the 90s to near 100. * WINDS...West 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 7 percent. 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. && $$ http://www.weather.gov/greatfalls
184 WWUS85 KTFX 160559 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 1159 PM MDT Tue Jun 15 2021 MTZ113-115-117-118-160700- /O.EXP.KTFX.FW.W.0004.000000T0000Z-210616T0600Z/ Hill and Blaine Counties-Chouteau and Fergus Counties- Central and Eastern Lewis and Clark National Forest Areas- Helena and Townsend Ranger Districts of the Helena National Forest- 1159 PM MDT Tue Jun 15 2021 ...RED FLAG WARNING WILL EXPIRE AT MIDNIGHT MDT TONIGHT FOR FIRE WEATHER ZONES 113, 115, 117, AND 118... The cold front has moved south and east of the area with cooler temperatures and improving humidity and the Red Flag Warning will be allowed to expire at midnight as scheduled. $$ 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 |
|---|---|---|---|---|
| Jun 13, 6:48 PM MDT | Special Weather Statement | TFX | Lewis and Clark | 42 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.