Alert archive / Montana / Red Flag Warnings in 2020
Red Flag Warning 3, NWS Missoula, MT
NWS Missoula, MT issued this red flag warning at Aug 19, 2020, 2:34 PM MDT for 7 counties in Montana. It took effect at Aug 20, 2020, 12:00 PM 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
- Aug 19, 2020, 2:34 PM MDT (20:34 UTC)
- In effect from
- Aug 20, 2020, 12:00 PM MDT
- Expired
- Aug 20, 2020, 10:00 PM MDT
- In force
- 10 hr
- Issued by
- NWS Missoula, MT
Counties Beaverhead County, MT, Deer Lodge County, MT, Granite County, MT, Jefferson County, MT, Madison County, MT, Powell County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 154 km from the middle of the area, began a volume at 20:37 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, 8.6 hours before the alert went out and 231 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
- 22 J/kg
- Mixed-layer CIN
- -215 J/kg
- Mixed-layer LCL
- 2797 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
486 WWUS85 KMSO 192034 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 234 PM MDT Wed Aug 19 2020 MTZ110-111-210400- /O.NEW.KMSO.FW.W.0003.200820T1800Z-200821T0400Z/ Deerlodge/West Beaverhead-East Beaverhead- 234 PM MDT Wed Aug 19 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT THURSDAY... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: A dry cold front will bring a combination of gusty west to southwesterly winds, low humidity, and unstable conditions. * Winds: West to southwest 10-20 mph with gusts to 30 mph. * Minimum humidities: 13-23 percent. && $$
1 follow-up statement
044 WWUS85 KMSO 210355 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 955 PM MDT Thu Aug 20 2020 MTZ110-111-210500- /O.EXP.KMSO.FW.W.0003.000000T0000Z-200821T0400Z/ Deerlodge/West Beaverhead-East Beaverhead- 955 PM MDT Thu Aug 20 2020 ...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). && $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 7:13 PM MDT | Special Weather Statement | MSO | 32 min | |
| Aug 19, 4:01 PM MDT | Special Weather Statement | MSO | Deer Lodge | 44 min |
Nearby
Red Flag Warnings in Montana, 2020Every red flag warning in 2020
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.