Alert archive / Montana / Red Flag Warnings in 2021
Red Flag Warning 18, NWS Missoula, MT
NWS Missoula, MT issued this red flag warning at Sep 8, 2021, 8:50 PM MDT for 7 counties in Montana. It took effect at Sep 9, 2021, 12:00 PM MDT. It was in force for 9 hr. 5 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
- Sep 8, 2021, 8:50 PM MDT (02:50 UTC)
- In effect from
- Sep 9, 2021, 12:00 PM MDT
- Expired
- Sep 9, 2021, 9:00 PM MDT
- In force
- 9 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 02:49 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 |
|---|---|---|---|
| Sep 9, 5:23 PM MDT | TSTM WND GST 46 | 5 Ene Dillon, MT | ASOS STATION KDLN DILLON AIRPORT. |
| Sep 9, 5:35 PM MDT | TSTM WND GST 51 | 5 Nne Cameron, MT | AWOS STATION KEKS ENNIS BIG SKY AWOS. |
| Sep 9, 5:45 PM MDT | TSTM WND GST 51 | 8 Ne Bannack, MT | BLM ARGENTA MESONET SITE. |
| Sep 9, 6:00 PM MDT | TSTM WND GST 45 | 6 S Alder, MT | RUBY VALLEY AGRIMET SITE. |
| Sep 9, 6:18 PM MDT | TSTM WND GST 58 | 5 Ene Dillon, MT | ASOS STATION KDLN DILLON AIRPORT. |
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, 2.8 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 3793 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 221 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
765 WWUS85 KMSO 090250 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 850 PM MDT Wed Sep 8 2021 MTZ110-111-100300- /O.NEW.KMSO.FW.W.0018.210909T1800Z-210910T0300Z/ Deerlodge/West Beaverhead-East Beaverhead- 850 PM MDT Wed Sep 8 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THURSDAY... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: The combination of gusty winds and low humidity along with high Haines will result in critical fire weather conditions. * Winds: West 15 to 25 mph with gusts 30 to 40 mph. * Minimum humidities: 12 to 17 percent. * Haines Index: 5 && $$
1 follow-up statement
170 WWUS85 KMSO 100238 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 838 PM MDT Thu Sep 9 2021 MTZ110-111-100345- /O.EXP.KMSO.FW.W.0018.000000T0000Z-210910T0300Z/ Deerlodge/West Beaverhead-East Beaverhead- 838 PM MDT Thu Sep 9 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING... * Affected area: Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: Critical fire weather conditions are expected to diminish. && $$
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.