Alert archive / Montana / Wind Advisories in 2011

Wind Advisory 25, NWS Missoula, MT

November 17, 20114 counties in Montana

NWS Missoula, MT issued this wind advisory at Nov 17, 2011, 7:57 AM MST for 4 counties in Montana. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Nov 17, 2011, 7:57 AM MST (14:57 UTC)
Expired
Nov 17, 2011, 2:00 PM MST
In force
6 hr
Issued by
NWS Missoula, MT

Counties Deer Lodge County, MT, Granite County, MT, Powell County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 110 km from the middle of the area, began a volume at 15:00 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, 3.0 hours before the alert went out and 225 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 2011-11-17Temperature 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 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 12:00Z on 2011-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 372 square meters per square second.1939587897117Sfc1 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
1783 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
372 m²/s²
0-3 km storm-relative helicity
391 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.

049 
WWUS75 KMSO 171457
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
757 AM MST THU NOV 17 2011

IDZ007-171600-
/O.CAN.KMSO.HW.W.0003.000000T0000Z-111117T1500Z/
OROFINO/GRANGEVILLE REGION-
657 AM PST THU NOV 17 2011

...HIGH WIND WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE HIGH
WIND WARNING. 

WEST TO SOUTHWEST WINDS 15 TO 25 WITH GUSTS TO 35 MPH STILL
EXPECTED THROUGH THE REMAINDER OF THE MORNING.


$$

IDZ008-171600-
/O.CAN.KMSO.WI.Y.0024.000000T0000Z-111117T1500Z/
LOWER HELLS CANYON/SALMON RIVER REGION-
657 AM PST THU NOV 17 2011

...WIND ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS CANCELLED THE WIND
ADVISORY. 

SOUTHWEST WINDS 15 TO 25 WITH GUSTS TO 35 MPH STILL EXPECTED
THROUGH THE REMAINDER OF THE MORNING.


$$

MTZ007-172100-
/O.NEW.KMSO.WI.Y.0025.111117T1457Z-111117T2100Z/
BUTTE/BLACKFOOT REGION-
757 AM MST THU NOV 17 2011

...WIND ADVISORY IN EFFECT UNTIL 2 PM MST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN MISSOULA HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON. 

* IMPACTS/TIMING: SOUTHWEST WINDS WILL BE INCREASING THIS MORNING
  FROM DEERLODGE TO GARRISON JUNCTION...AS WELL OVER MACDONALD
  PASS. WINDS WILL BE WESTERLY AND BEGIN DECREASING BY MID
  AFTERNOON.

* WINDS: SOUTHWEST 25 TO 35 MPH WITH GUSTS TO 45 MPH. WINDS
  BECOMING WESTERLY 15 TO 25 MPH WITH GUSTS 35 MPH BY MID
  AFTERNOON.

* LOCATIONS IMPACTED INCLUDE...BUTTE...GEORGETOWN LAKE...HIGHWAY 
  12 GARRISON TO ELLISTON...MACDONALD PASS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
2 follow-up statements
046 
WWUS75 KMSO 171541
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
841 AM MST THU NOV 17 2011

MTZ007-172100-
/O.CON.KMSO.WI.Y.0025.000000T0000Z-111117T2100Z/
BUTTE/BLACKFOOT REGION-
841 AM MST THU NOV 17 2011

...WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS
AFTERNOON...

A WIND ADVISORY REMAINS IN EFFECT UNTIL 2 PM MST THIS AFTERNOON. 

* IMPACTS/TIMING: SOUTHWEST WINDS WILL BE INCREASING THIS MORNING
  FROM DEERLODGE TO GARRISON JUNCTION...AS WELL OVER MACDONALD
  PASS. IN ADDITION TO WIND...SNOW WILL BE DEVELOPING THIS MORNING.
  THE COMBINATION OF WIND AND SNOW WILL CAUSE LOWER VISIBILITIES
  DUE TO BLOWING SNOW. WINDS WILL BE WESTERLY AND BEGIN DECREASING
  BY MID AFTERNOON.

* WINDS: SOUTHWEST 25 TO 35 MPH WITH GUSTS TO 45 MPH. WINDS 
  BECOMING WESTERLY 15 TO 25 MPH WITH GUSTS 35 MPH BY MID 
  AFTERNOON. 

* LOCATIONS IMPACTED INCLUDE...BUTTE...GEORGETOWN LAKE...HIGHWAY 
  12 GARRISON TO ELLISTON...MACDONALD PASS

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 35 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH
PROFILE VEHICLES. USE EXTRA CAUTION.

&&

$$
081 
WWUS75 KMSO 172048
NPWMSO

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MISSOULA MT
148 PM MST THU NOV 17 2011

MTZ007-172200-
/O.EXP.KMSO.WI.Y.0025.000000T0000Z-111117T2100Z/
BUTTE/BLACKFOOT REGION-
148 PM MST THU NOV 17 2011

...WIND ADVISORY WILL EXPIRE AT 2 PM MST THIS AFTERNOON...

THE WIND ADVISORY WILL EXPIRE AT 2 PM MST THIS AFTERNOON. 

WESTERLY WINDS HAVE DECREASED ACROSS THE BUTTE/BLACKFOOT REGION
THIS AFTERNOON. THEREFORE...THE WIND ADVISORY HAS BEEN ALLOWED TO
EXPIRE. 

* LOCATIONS IMPACTED INCLUDE...BUTTE...GEORGETOWN LAKE...HIGHWAY 
  12 GARRISON TO ELLISTON...MACDONALD PASS

$$

The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 17, 4:48 AM MSTWinter Weather AdvisoryMSOFlathead, Lake, Missoula, Ravalli, Sanders6 hr
Nov 17, 2:36 PM MSTWind Chill AdvisoryMSOFlathead, Lake23 hr
Nov 17, 2:36 PM MSTWinter Weather AdvisoryMSODeer Lodge, Flathead, Granite, Lake, Lincoln, Mineral and 5 more38 hr

Nearby

Wind Advisories in Montana, 2011Every wind advisory 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.