Alert archive / Montana / Red Flag Warnings in 2017
Red Flag Warning 16, NWS Missoula, MT
NWS Missoula, MT issued this red flag warning at Sep 12, 2017, 2:02 PM MDT for 10 counties in Montana. It took effect at Sep 13, 2017, 3:00 PM MDT. It was in force for 4 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
- Sep 12, 2017, 2:02 PM MDT (20:02 UTC)
- In effect from
- Sep 13, 2017, 3:00 PM MDT
- Expired
- Sep 13, 2017, 7:06 PM MDT
- In force
- 4 hr
- Issued by
- NWS Missoula, MT
Counties Beaverhead County, MT, Deer Lodge County, MT, Granite County, MT, Jefferson County, MT, Lewis and Clark County, MT, Madison County, MT, Missoula County, MT, Powell County, MT, Ravalli County, MT, Silver Bow County, MT
The radar
The Missoula radar (KMSX), 122 km from the middle of the area, began a volume at 20:06 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, 8.0 hours before the alert went out and 226 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
- 3806 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
542 WWUS85 KMSO 122002 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 202 PM MDT Tue Sep 12 2017 MTZ108>111-132015- /O.NEW.KMSO.FW.W.0016.170913T2100Z-170914T0200Z/ East Lolo-Bitterroot-Deerlodge/West Beaverhead-East Beaverhead- 202 PM MDT Tue Sep 12 2017 ...RED FLAG WARNING IN EFFECT FROM 3 PM TO 8 PM MDT WEDNESDAY for Wind and Dry Conditions... * Affected area: Fire Zone 108 (East Lolo). Fire Zone 109 (Bitterroot). Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: A combination of stronger northwest winds and moderately low RH will create an extreme fire weather period from mid afternoon Wednesday through early evening across much of southwest Montana. * Winds: West to northwest winds will increase to 15 to 25 mph by mid afternoon and continue through the evening. * Minimum humidities: RH will fall to 15 to 20 percent in the valleys and 20 to 25 percent in the terrain. The lowest RH will only persist into early evening with values increasing significantly through the remainder of the night. && $$ MTZ104-105-130600- /O.CON.KMSO.FW.W.0015.000000T0000Z-170913T0600Z/ Kootenai-Flathead/Glacier Park- 202 PM MDT Tue Sep 12 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT... * Impacts: Breezy westerly winds and low humidity will combine to create Red Flag conditions this afternoon and evening. Winds and humidities will be slow to improve, thus critical fire conditions are expected well into the evening. * Winds: West-southwest 15 to 25 mph, gusting to 35 mph mainly for midslopes and ridgetops. * Minimum Humidities: 10 to 20 percent. && $$
2 follow-up statements
272 WWUS85 KMSO 130451 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 1051 PM MDT Tue Sep 12 2017 MTZ104-105-130600- /O.CAN.KMSO.FW.W.0015.000000T0000Z-170913T0600Z/ Kootenai-Flathead/Glacier Park- 1051 PM MDT Tue Sep 12 2017 ...RED FLAG WARNING IS CANCELLED... The National Weather Service in Missoula has cancelled the Red Flag Warning. Humidities have improved and winds are gradually decreasing, thus critical fire weather conditions are no longer expected. $$ MTZ108>111-140200- /O.CON.KMSO.FW.W.0016.170913T2100Z-170914T0200Z/ East Lolo-Bitterroot-Deerlodge/West Beaverhead-East Beaverhead- 1051 PM MDT Tue Sep 12 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM TO 8 PM MDT WEDNESDAY... * Affected area: Fire Zone 108 (East Lolo). Fire Zone 109 (Bitterroot). Fire Zone 110 (Deerlodge/West Beaverhead). Fire Zone 111 (East Beaverhead). * Impacts: A combination of stronger northwest winds and moderately low RH will create an extreme fire weather period from mid afternoon Wednesday through early evening across much of southwest Montana. * Winds: West to northwest winds will increase to 15 to 25 mph by mid afternoon and continue through the evening. * Minimum humidities: RH will fall to 15 to 20 percent in the valleys and 20 to 25 percent in the terrain. The lowest RH will only persist into early evening with values increasing significantly through the remainder of the night. && $$
845 WWUS85 KMSO 140106 RFWMSO URGENT - FIRE WEATHER MESSAGE National Weather Service Missoula MT 706 PM MDT Wed Sep 13 2017 MTZ108>111-140215- /O.CAN.KMSO.FW.W.0016.000000T0000Z-170914T0200Z/ East Lolo-Bitterroot-Deerlodge/West Beaverhead-East Beaverhead- 706 PM MDT Wed Sep 13 2017 ...RED FLAG WARNING IS CANCELLED... The National Weather Service in Missoula has cancelled the Red Flag Warning. Winds will continue to decrease through the evening with humidity slowly increasing. $$
The office that day
Everything else NWS Missoula, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 12, 2:03 PM MDT | Winter Storm Watch | MSO | Deer Lodge, Granite, Lake, Missoula, Powell, Ravalli and 1 more | 43 hr |
Nearby
Red Flag Warnings in Montana, 2017Every red flag warning in 2017
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.