Alert archive / Montana / Red Flag Warnings in 2011

Red Flag Warning 5, NWS Missoula, MT

September 6, 20117 counties in Montana

NWS Missoula, MT issued this red flag warning at Sep 6, 2011, 3:31 AM MDT for 7 counties in Montana. It took effect at Sep 6, 2011, 12:00 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
Sep 6, 2011, 3:31 AM MDT (09:31 UTC)
In effect from
Sep 6, 2011, 12:00 PM MDT
Expired
Sep 6, 2011, 9:16 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 09:30 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 00:00Z, 9.5 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 00:00Z on 2011-09-06Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Great_falls, MT at 00:00Z on 2011-09-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.1939Sfc1 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
3901 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

545 
WWUS85 KMSO 060931
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
331 AM MDT TUE SEP 6 2011

MTZ110-111-062100-
/O.NEW.KMSO.FW.W.0005.110906T1800Z-110907T0600Z/
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
331 AM MDT TUE SEP 6 2011

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO MIDNIGHT MDT
TONIGHT FOR WINDS AND LOW HUMIDITIES ACROSS THE DEERLODGE/WEST
BEAVERHEAD...EAST BEAVERHEAD...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A RED FLAG
WARNING FOR GUSTY WINDS AND LOW HUMIDITIES...WHICH IS IN EFFECT
FROM NOON TODAY TO MIDNIGHT MDT TONIGHT. 


* WINDS: NORTH 5-10 MPH

* MINIMUM HUMIDITIES: 8-12 PERCENT WITH POOR RECOVERIES CONTINUING
  OVERNIGHT. 

* THUNDERSTORMS:ISOLATED HIGH BASED THUNDERSTORMS WITH GUSTY WINDS
  AND LIGHTNING MAIN IMPACTS. 

* TIMING:NOON TODAY THROUGH MIDNIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING IS INTENDED TO ALERT LAND MANAGERS TO EXPECTED
WEATHER CONDITIONS THAT ALONG WITH SUFFICIENTLY DRY FUELS...WILL
SIGNIFICANTLY INCREASE FIRE DANGER.

&&

$$
2 follow-up statements
476 
WWUS85 KMSO 062040
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
240 PM MDT TUE SEP 6 2011

MTZ110-111-070600-
/O.CON.KMSO.FW.W.0005.000000T0000Z-110907T0600Z/
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
240 PM MDT TUE SEP 6 2011

...RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT
FOR GUSTY WINDS AND LOW HUMIDITIES ACROSS THE DEERLODGE/WEST
BEAVERHEAD...EAST BEAVERHEAD...

A RED FLAG WARNING REMAINS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT. 

* WINDS: NORTH 5-10 MPH

* MINIMUM HUMIDITIES: 8-12 PERCENT WITH POOR RECOVERIES 
  CONTINUING OVERNIGHT. 

* THUNDERSTORMS: ISOLATED HIGH BASED THUNDERSTORMS WITH GUSTY
  WINDS AND LIGHTNING...NO RAIN.

* TIMING: NOON TODAY THROUGH MIDNIGHT.

* HAINES INDEX OF 6.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RED FLAG WARNING IS INTENDED TO ALERT LAND MANAGERS TO EXPECTED
WEATHER CONDITIONS THAT ALONG WITH SUFFICIENTLY DRY FUELS...WILL
SIGNIFICANTLY INCREASE FIRE DANGER.

&&

$$
450 
WWUS85 KMSO 070316
RFWMSO

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
916 PM MDT TUE SEP 6 2011

MTZ110-111-070430-
/O.CAN.KMSO.FW.W.0005.000000T0000Z-110907T0600Z/
DEERLODGE/WEST BEAVERHEAD-EAST BEAVERHEAD-
916 PM MDT TUE SEP 6 2011

...RED FLAG WARNING IS CANCELLED FOR GUSTY WINDS AND LOW
HUMIDITIES ACROSS THE DEERLODGE/WEST BEAVERHEAD...EAST
BEAVERHEAD...

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

WINDS HAVE DECREASED AND HUMIDITY HAS BEGUN TO RECOVER ABOVE
CRITICAL VALUES THIS EVENING. THEREFORE THE RED FLAG WILL BE CANCELLED.

$$

Nearby

Red Flag Warnings in Montana, 2011Every red flag warning in 2011

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.