Alert archive / Montana / Red Flag Warnings in 2016

Red Flag Warning 10, NWS Missoula, MT

September 1, 20164 counties in Montana

NWS Missoula, MT issued this red flag warning at Sep 1, 2016, 1:45 PM MDT for 4 counties in Montana. It took effect at Sep 2, 2016, 12:00 PM MDT. It was in force for 8 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 1, 2016, 1:45 PM MDT (19:45 UTC)
In effect from
Sep 2, 2016, 12:00 PM MDT
Expired
Sep 2, 2016, 8:11 PM MDT
In force
8 hr
Issued by
NWS Missoula, MT

Counties Beaverhead County, MT, Jefferson County, MT, Madison County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 200 km from the middle of the area, began a volume at 19:45 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, 7.8 hours before the alert went out and 246 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, Great_falls, MT at 12:00Z on 2016-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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, Great_falls, MT at 12:00Z on 2016-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 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
18 J/kg
Mixed-layer CIN
-303 J/kg
Mixed-layer LCL
2856 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
232 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

528 
WWUS85 KMSO 011945
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
145 PM MDT THU SEP 1 2016

MTZ111-030300-
/O.NEW.KMSO.FW.W.0010.160902T1800Z-160903T0300Z/
EAST BEAVERHEAD-
145 PM MDT THU SEP 1 2016

...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT FRIDAY...

* AFFECTED AREA:
   FIRE ZONE 111 (EAST BEAVERHEAD).

* WINDS: WEST 20-30 MPH WITH GUSTS TO 45 MPH, POSSIBLE HIGHER ON
  RIDGE TOPS. WINDS WILL BECOME NORTHWESTERLY BEHIND COLD FRONT
  PASSAGE FRIDAY AFTERNOON.

* MINIMUM HUMIDITIES: 18-28 PERCENT.

&&

$$
1 follow-up statement
730 
WWUS85 KMSO 030211
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
811 PM MDT FRI SEP 2 2016

MTZ111-030315-
/O.CAN.KMSO.FW.W.0010.000000T0000Z-160903T0300Z/
EAST BEAVERHEAD-
811 PM MDT FRI SEP 2 2016

...RED FLAG WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE RED
FLAG WARNING. 

THE RELATIVE HUMIDITY HAS BEEN STEADILY INCREASING THIS EVENING AS
THE COLD FRONT PUSHES THROUGH. THE WINDS WILL BE DIMINISHING AFTER
MIDNIGHT.

$$

Nearby

Red Flag Warnings in Montana, 2016Every red flag warning in 2016

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.