Alert archive / Montana / Red Flag Warnings in 2016

Red Flag Warning 2, NWS Missoula, MT

July 21, 20167 counties in Montana

NWS Missoula, MT issued this red flag warning at Jul 21, 2016, 2:31 PM MDT for 7 counties in Montana. It took effect at Jul 22, 2016, 1:00 PM MDT. It was in force for 9 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 21, 2016, 2:31 PM MDT (20:31 UTC)
In effect from
Jul 22, 2016, 1:00 PM MDT
Expired
Jul 22, 2016, 9:47 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 20:29 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, 8.5 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.

Skew-T log-pSkew-T log-p diagram, Great_falls, MT at 12:00Z on 2016-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2016-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2667 m above ground
0-6 km bulk shear
45 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

888 
WWUS85 KMSO 212031
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
231 PM MDT THU JUL 21 2016

MTZ110-111-222045-
/O.NEW.KMSO.FW.W.0002.160722T1900Z-160723T0600Z/
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
231 PM MDT THU JUL 21 2016

...RED FLAG WARNING IN EFFECT FROM 1 PM FRIDAY TO MIDNIGHT MDT
FRIDAY NIGHT...

* AFFECTED AREA:
   FIRE ZONE 110 (DEERLODGE/WEST BEAVERHEAD)
   FIRE ZONE 111 (EAST BEAVERHEAD)

* WINDS: INCREASING TO 15-25 MPH IN THE AFTERNOON WITH RIDGE TOP
  WINDS NEAR 30 MPH WITH GUSTS UP TO 40 MPH.

* MINIMUM HUMIDITIES: LOW TEENS AT LOWER ELEVATIONS AND NEAR 20
  PERCENT AT HIGH ELEVATIONS.

* COLD FRONT: THE COLD FRONT IS EXPECTED IN THE LATE EVENING, SO
  EVEN AS HUMIDITY MIGHT START TO RECOVER AFTER SUNSET THE RED
  FLAG WARNING CONTINUES LATE INTO THE EVENING TO COVER THE
  STRONG WINDS AND WIND SHIFT ASSOCIATED WITH THE COLD FRONT.

$$
1 follow-up statement
446 
WWUS85 KMSO 230347
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
947 PM MDT FRI JUL 22 2016

MTZ110-111-230500-
/O.CAN.KMSO.FW.W.0002.000000T0000Z-160723T0600Z/
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
947 PM MDT FRI JUL 22 2016

...RED FLAG WARNING IS CANCELLED...

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

WINDS HAVE BEGUN TO DECREASE BEHIND COLD FRONT PASSAGE THIS
EVENING.

$$

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.