Alert archive / Montana / Red Flag Warnings in 2017

Red Flag Warning 3, NWS Missoula, MT

July 24, 20177 counties in Montana

NWS Missoula, MT issued this red flag warning at Jul 24, 2017, 3:08 AM MDT for 7 counties in Montana. It took effect at Jul 24, 2017, 2:00 PM MDT. It was in force for 7 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 24, 2017, 3:08 AM MDT (09:08 UTC)
In effect from
Jul 24, 2017, 2:00 PM MDT
Expired
Jul 24, 2017, 9:00 PM MDT
In force
7 hr
Issued by
NWS Missoula, MT

Counties Flathead County, MT, Granite County, MT, Lewis and Clark County, MT, Mineral County, MT, Missoula County, MT, Powell County, MT, Sanders County, MT

The radar

The Missoula radar (KMSX), 23 km from the middle of the area, began a volume at 09:12 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

Spokane, WA (KOTX), launched 00:00Z, 9.1 hours before the alert went out and 200 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.

Skew-T log-pSkew-T log-p diagram, Spokane, WA at 00:00Z on 2017-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Spokane, WA at 00:00Z on 2017-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
19 J/kg
Mixed-layer CIN
-225 J/kg
Mixed-layer LCL
2864 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

204 
WWUS85 KMSO 240908
RFWMSO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Missoula MT
308 AM MDT Mon Jul 24 2017

MTZ106-108-250300-
/O.NEW.KMSO.FW.W.0003.170724T2000Z-170725T0300Z/
West Lolo-East Lolo-
308 AM MDT Mon Jul 24 2017

...RED FLAG WARNING IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM
MDT THIS EVENING...

* Affected area:
   Fire Zone 106 (West Lolo).
   Fire Zone 108 (East Lolo).

* Winds: Northwest 15 to 20 mph with gusts to 30 mph.

* Minimum humidities: 10 to 15 percent.

&&

$$
1 follow-up statement
003 
WWUS85 KMSO 250247
RFWMSO

URGENT - FIRE WEATHER MESSAGE
National Weather Service Missoula MT
847 PM MDT Mon Jul 24 2017

MTZ106-108-250400-
/O.EXP.KMSO.FW.W.0003.000000T0000Z-170725T0300Z/
West Lolo-East Lolo-
847 PM MDT Mon Jul 24 2017

...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING...

* Affected area:
   Fire Zone 106 (West Lolo).
   Fire Zone 108 (East Lolo).

* Winds have begun to decrease with RHs improving across the area.

&&

$$

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.