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National Weather Service United States Department of Commerce

Snow Across the Great Lakes, Central Appalachians, and Northeast; Unsettled Weather in the West

Light to moderate snow will continue into Saturday over the Great Lakes, Central Appalachians, and Northeast. This weekend into next week, a series of atmospheric rivers will bring gusty winds, periods of heavy rain, and mountain snow to northern California and the Pacific Northwest. Colder temperatures are in store for the weekend from the Great Lakes to East Coast. Read More >

 

FWUS46 KPQR 220001
AVGPQR
FWUS46 KPQR 220001
AVGPQR

Avalanche Weather Guidance
National Weather Service Portland OR
401 PM PST Sat Dec 21 2024


...Mount St. Helens...

Date                    Sunday 12/22/24                         Monday 12/23/24                    
Time (LT)          04   07   10   13   16   19   22   01   04   07   10   13   16   19   22   01   04
                   4a   7a   10a  1p   4p   7p   10p  1a   4a   7a   10a  1p   4p   7p   10p  1a   4a   

Cloud Cover        OV   OV   OV   OV   OV   OV   OV   OV   OV   OV   SC   BK   OV   OV   OV   OV   OV
Cloud Cover (%)    85   90  100   95  100  100  100  100   80   75   45   50   85   85  100  100   90
Temperature        30   30   31   32   33   33   34   33   32   33   32   33   33   34   35   36   33
Max/Min Temp                           34                  31                  35                  31
Wind Dir            S    S    S    S    S    S   SW   SW   SW   SW    S   SE   SE   SE   SE   SE    S
Wind (mph)         14   20   24   24   20   19   18   17   10    9   11   16   21   28   29   24   17
Wind Gust (mph)    24   33   39   39   32   33   29   29   18   16   19   26   34   46   46   37   26
Precip Prob (%)    30   30  100   90  100  100  100  100   30   30    5    5   80   80  100  100   90
Precip Type         S    S    S    S    S    S    S    S    S    S              S    S    S    S    S
6 Hour QPF                 0.17      0.81      0.97      0.42      0.04      0.00      0.33      0.56
6 Hour Snow                 1.1       3.2       3.3       2.6       0.2       0.0       0.7       1.3
12 Hour Snow                          4.3                 5.9                 0.2                 2.0
 Low End Snow                          MM                  MM                  MM                  MM
 High End Snow                         MM                  MM                  MM                  MM
6 Hour Ice                 0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
Snow Level (kft)  4.2  4.0  4.1  5.1  5.9  5.7  5.2  4.8  4.4  4.2  3.9  4.1  4.6  5.7  6.6  6.0  4.8


...Mount Hood...

Date                    Sunday 12/22/24                         Monday 12/23/24                    
Time (LT)          04   07   10   13   16   19   22   01   04   07   10   13   16   19   22   01   04
                   4a   7a   10a  1p   4p   7p   10p  1a   4a   7a   10a  1p   4p   7p   10p  1a   4a   

Cloud Cover        OV   OV   OV   OV   OV   OV   OV   OV   BK   SC   SC   BK   OV   OV   OV   OV   OV
Cloud Cover (%)    85   85   85  100  100  100   95   95   65   40   40   60   90   90  100  100   95
Temperature        23   25   28   30   31   31   29   28   27   27   30   30   29   30   31   31   30
Max/Min Temp                           32                  25                  32                  27
Wind Dir           SW   SW   SW   SW   SW   SW   SW    W    W   SW   SW   SE   SE   SE   SE   SW    W
Wind (mph)         10   14   16   13   13   19   28   33   20   11    8   12   19   25   26   20   16
Wind Gust (mph)    16   23   25   21   20   31   36   50   31   18   14   20   28   34   35   29   25
Precip Prob (%)    20   20   80  100  100  100   90   90   20   20   10   10   80   80  100  100   90
Precip Type         S    S    S    S    S    S    S    S    S    S              S    S    S    S    S
6 Hour QPF                 0.12      0.44      0.84      0.49      0.01      0.00      0.34      0.52
6 Hour Snow                 1.0       3.0       5.5       4.8       0.1       0.0       1.6       2.7
12 Hour Snow                          4.0                10.3                 0.1                 4.3
 Low End Snow                          MM                  MM                  MM                  MM
 High End Snow                         MM                  MM                  MM                  MM
6 Hour Ice                 0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
Snow Level (kft)  4.1  4.1  4.6  6.1  6.6  6.2  5.5  5.0  4.6  4.2  4.0  4.5  5.2  6.2  7.0  6.5  5.1

$$

--- Precip Type Codes ---

CODE   TYPE
 T     Thunderstorms
 R     Rain
 S     Snow
 I     Sleet
 Z     Freezing Rain










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