Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 10, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Jul 31, 2021, 1:36 PM MDT for 9 counties in Montana. It took effect at Aug 1, 2021, 12:00 PM MDT. It was in force for 9 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
- Jul 31, 2021, 1:36 PM MDT (19:36 UTC)
- In effect from
- Aug 1, 2021, 12:00 PM MDT
- Expired
- Aug 1, 2021, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Great Falls, MT
Counties Blaine County, MT, Chouteau County, MT, Fergus County, MT, Glacier County, MT, Hill County, MT, Liberty County, MT, Phillips County, MT, Pondera County, MT, Toole County, MT
The radar
The Great Falls radar (KTFX), 113 km from the middle of the area, began a volume at 19:36 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, 7.6 hours before the alert went out and 93 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
- 21 J/kg
- Mixed-layer CIN
- -211 J/kg
- Mixed-layer LCL
- 2552 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
282 WWUS85 KTFX 311936 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 136 PM MDT Sat Jul 31 2021 MTZ112-113-115-011100- /O.UPG.KTFX.FW.A.0008.210801T1800Z-210802T0300Z/ /O.NEW.KTFX.FW.W.0010.210801T1800Z-210802T0300Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Hill and Blaine Counties-Chouteau and Fergus Counties- 136 PM MDT Sat Jul 31 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SUNDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 113, AND 115... 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 noon to 9 PM MDT Sunday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties and Chouteau and Fergus Counties. * WINDS...Southeast 15 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Any fires, new or existing, may grow and spread rapidly. 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. && $$ http://www.weather.gov/greatfalls
2 follow-up statements
435 WWUS85 KTFX 010743 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 143 AM MDT Sun Aug 1 2021 MTZ112-113-115-020300- /O.CON.KTFX.FW.W.0010.210801T1800Z-210802T0300Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Hill and Blaine Counties-Chouteau and Fergus Counties- 143 AM MDT Sun Aug 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 113, AND 115... * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties and Chouteau and Fergus Counties. * WINDS...Southeast 15 to 20 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 13 percent. * IMPACTS...Any fires, new or existing, may grow and spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && Moldan $$ http://www.weather.gov/greatfalls
418 WWUS85 KTFX 020236 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 836 PM MDT Sun Aug 1 2021 MTZ112-113-115-020345- /O.EXP.KTFX.FW.W.0010.000000T0000Z-210802T0300Z/ Eastern Glacier/Toole/Central/Eastern Pondera/Liberty- Hill and Blaine Counties-Chouteau and Fergus Counties- 836 PM MDT Sun Aug 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 112, 113, AND 115... Breezy easterly winds and low relative humidity are expected to continue for the next couple hours; however, the trend is for winds to decrease and for relative humidity to increase. For these reasons, the Red Flag Warning is allowed to expire. $$
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 9:49 PM MDT | Special Weather Statement | TFX | Glacier | 41 min |
| Jul 31, 3:12 AM MDT | Fire Weather Watch | TFX | Blaine, Chouteau, Fergus, Glacier, Hill, Liberty and 3 more | 10 hr |
| Jul 31, 10:42 AM MDT | Flash Flood Watch | TFX | 37 hr | |
| Jul 31, 1:32 PM MDT | Special Weather Statement | TFX | Judith Basin | 28 min |
| Jul 31, 2:32 PM MDT | Special Weather Statement | TFX | Judith Basin | 28 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.