Snow Avalanche Guidance
Issued by NWS Missoula, MT

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000
FWUS45 KMSO 172045
SAGMSO

Backcountry Forecast for western Montana and north central Idaho
National Weather Service Missoula MT
245 PM MDT Thu Apr 17 2014

.Discussion...A very cold trough of low pressure will move over
the Northern Rockies on Friday. The atmosphere will very unstable
with much stronger westerly winds. Convective snow showers will be
increasing towards the middle of the day with a potential
thunderstorm in the far northwest corner of Montana in the morning.

A ridge of high pressure will begin to build into the Northern
Rockies region from the west on Friday night. Showers and winds
will be tapering off during the evening hours as the atmosphere
stabilizes and surface pressure pattern relaxes. Drier, warmer
conditions can be expected by Saturday as the upper ridge
migrates directly over the area.

Another strong frontal system will pass through the region
Saturday night. Although this system does not have as much
moisture as tonight`s system, it will pack a pretty windy punch.
Westerly winds will be quite strong throughout the day Sunday.

For the latest information on watches, warnings and advisories, go
to weather.gov/missoula.

MTZ001-180845-
Far northwest Montana (Kootenai)-
including...Purcell and Cabinet Mountains

--------------------------- 5000-7000 FT ----------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       MCLEAR      PCLDY       PCLDY
HI/LO TEMPS  37 to 45    26 to 31    48 to 55    27 to 33    40 to 50
WINDS(MPH)   SW 21       W 14        SW 10       SW 14       SW 18
PRECIP CHC   80          0           0           40          30
PRECIP TYPE  tstms       NONE        NONE        showers     SNO/SHR
LIQUID AMT   0.13        0.00        0.00        0.05        0.02
SNOW AMT(IN) 2-3         0           0           0-1         0-1

SNOW LEVEL   3500        3500        4500        5000        4500

$$
MTZ002-009-180845-
Northwest Montana (Flathead and Glacier Park)-
including...Mission and Swan Ranges

--------------------------- 4000-6000 FT ----------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       PCLDY       PCLDY       PCLDY
HI/LO TEMPS  37 to 45    23 to 28    47 to 55    28 to 34    42 to 51
WINDS(MPH)   SW 24       SW 20       SW 12       SW 10       SW 16
PRECIP CHC   80          30          0           30          30
PRECIP TYPE  showers     SNO/SHR     NONE        showers     showers
LIQUID AMT   0.18        0.02        0.00        0.06        0.02
SNOW AMT(IN) 2-3         0-1         0           0-1         0-1

--------------------------- 6000-8000 FT ----------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       PCLDY       PCLDY       PCLDY
HI/LO TEMPS  34 to 43    22 to 27    42 to 53    25 to 31    38 to 47
WINDS(MPH)   SW 27       W 24        SW 13       SW 13       SW 21
PRECIP CHC   80          30          0           30          30
PRECIP TYPE  SNO/SHR     SNO/SHR     NONE        SNO/SHR     SNO/SHR
LIQUID AMT   0.19        0.02        0.00        0.06        0.02
SNOW AMT(IN) 2-4         0-1         0           1           0-1

SNOW LEVEL   4000        3000        4500        5000        5000

$$
MTZ004-006-043-180845-
West central Montana-
including...Rattlesnake Wilderness and
Bitterroots from Lookout Pass to Lost Trail Pass

--------------------------- 4000-6000 FT ----------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       MCLEAR      PCLDY       PCLDY
HI/LO TEMPS  38 to 50    25 to 30    51 to 63    27 to 34    41 to 57
WINDS(MPH)   W 19        W 10        SW  8       W 10        W 13
PRECIP CHC   80          0           0           30          0
PRECIP TYPE  showers     NONE        NONE        showers     showers
LIQUID AMT   0.07        0.00        0.00        0.03        0.00
SNOW AMT(IN) 1-2         0           0           0           0

--------------------------- 6000-8000 FT ----------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       MCLEAR      PCLDY       PCLDY
HI/LO TEMPS  34 to 47    24 to 28    47 to 57    25 to 31    39 to 52
WINDS(MPH)   W 17        NW 10       SW 10       W 10        SW 11
PRECIP CHC   80          0           0           20          0
PRECIP TYPE  SNO/SHR     SNO/SHR     NONE        SNO/SHR     SNO/SHR
LIQUID AMT   0.08        0.00        0.00        0.01        0.00
SNOW AMT(IN) 1-2         0           0           0-1         0

SNOW LEVEL   5000        4500        6000        6000        5500

$$
IDZ006-180845-
US Highway 12 in Idaho (Lochsa)-
including...Powell

--------------------------- 2000-4000 FT ----------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       MCLEAR      PCLDY       PCLDY
HI/LO TEMPS  50 to 54    25 to 30    64 to 67    28 to 33    55 to 59
WINDS(MPH)   W 15        W  6        S  5        W  8        SW 11
PRECIP CHC   70          0           0           30          0
PRECIP TYPE  showers     NONE        NONE        showers     NONE
LIQUID AMT   0.07        0.00        0.00        0.02        0.00
SNOW AMT(IN) 0           0           0           0           0

------------------------- 4000 TO 6000 FT ---------------------------
             FRI         FRI NIGHT   SAT         SAT NIGHT   SUN
CLOUD COVER  MCLDY       PCLDY       MCLEAR      PCLDY       PCLDY
HI/LO TEMPS  40 to 47    24 to 27    54 to 62    24 to 29    45 to 53
WINDS(MPH)   W 15        NW  6       SW  6       W  9        SW 12
PRECIP CHC   80          0           0           30          0
PRECIP TYPE  showers     NONE        NONE        showers     SNO/SHR
LIQUID AMT   0.08        0.00        0.00        0.03        0.00
SNOW AMT(IN) 1-2         0           0           0           0

SNOW LEVEL   4500        4000        6000        5500        5000

$$







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