Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 3, NWS Great Falls, MT
NWS Great Falls, MT issued this red flag warning at Apr 29, 2021, 2:05 PM MDT for Blaine County, Hill County, Phillips County, Montana. It took effect at Apr 30, 2021, 11:00 AM MDT. It was in force for 10 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
- Apr 29, 2021, 2:05 PM MDT (20:05 UTC)
- In effect from
- Apr 30, 2021, 11:00 AM MDT
- Expired
- Apr 30, 2021, 9:00 PM MDT
- In force
- 10 hr
- Issued by
- NWS Great Falls, MT
Counties Blaine County, MT, Hill County, MT, Phillips County, MT
The radar
The Glasgow radar (KGGW), 177 km from the middle of the area, began a volume at 20:08 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, 8.1 hours before the alert went out and 162 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
- 2010 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
432 WWUS85 KTFX 292005 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 205 PM MDT Thu Apr 29 2021 MTZ113-301115- /O.UPG.KTFX.FW.A.0003.210430T1800Z-210501T0300Z/ /O.NEW.KTFX.FW.W.0003.210430T1700Z-210501T0300Z/ Hill and Blaine Counties- 205 PM MDT Thu Apr 29 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 9 PM MDT FRIDAY FOR HOT TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 113... 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 11 AM to 9 PM MDT Friday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Hill and Blaine Counties. * TEMPERATURES...In the lower 70s. * WINDS...West 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...Around 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. && $$ http://www.weather.gov/greatfalls
3 follow-up statements
335 WWUS85 KTFX 300815 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 215 AM MDT Fri Apr 30 2021 MTZ113-302200- /O.CON.KTFX.FW.W.0003.210430T1700Z-210501T0300Z/ Hill and Blaine Counties- 215 AM MDT Fri Apr 30 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 9 PM MDT THIS EVENING FOR WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 113... The National Weather Service in Great Falls has issued a Red Flag Warning for warm temperatures, gusty winds, and low relative humidity, which is in effect from 11 AM to 9 PM MDT today. * AFFECTED AREA...Hill and Blaine Counties. * TEMPERATURES...In the upper 70s and lower 80s. * WINDS...West 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...7 to 15 percent. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. Please advise the appropriate officials or fire crews in these areas of this Red Flag Warning. && $$ http://www.weather.gov/greatfalls
368 WWUS85 KTFX 302010 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 210 PM MDT Fri Apr 30 2021 MTZ113-010300- /O.CON.KTFX.FW.W.0003.000000T0000Z-210501T0300Z/ Hill and Blaine Counties- 210 PM MDT Fri Apr 30 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WARM TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 113... * AFFECTED AREA...Hill and Blaine Counties. * TEMPERATURES...In the upper-70s to lower-80s. * WINDS...West 20 to 30 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...7 to 15 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. && $$ http://www.weather.gov/greatfalls
686 WWUS85 KTFX 010248 RFWTFX URGENT - FIRE WEATHER MESSAGE National Weather Service Great Falls MT 848 PM MDT Fri Apr 30 2021 MTZ113-010400- /O.EXP.KTFX.FW.W.0003.000000T0000Z-210501T0300Z/ Hill and Blaine Counties- 848 PM MDT Fri Apr 30 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR HOT TEMPERATURES, GUSTY WINDS, AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 113... Winds and relative humidity values are no longer exceeding Red Flag Warning criteria across most of the zone. Please continue to exercise caution with any sparks or flames outdoors. $$ 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 |
|---|---|---|---|---|
| Apr 29, 1:38 AM MDT | Fire Weather Watch | TFX | Blaine, Hill, Phillips | 12 hr |
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.