National Weather Service United States Department of Commerce

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

BROKEN TOP
 
 DATE                    SUNDAY 12/07/25                         MONDAY 12/08/25                    
 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   OV   OV   OV   OV   OV   OV   OV
 CLOUD COVER (%)    80   85   85   85   75   70   85   80   80   85   90   90   80   80   75   75   75
 TEMPERATURE        28   30   32   33   32   32   33   34   34   34   34   35   36   35   36   36   36
 MAX/MIN TEMP                           33                  32                  36                  35
 WIND DIR            W    W    W    W    W   SW   SW   SW   SW   SW   SW   SW   SW    W   SW    W    W
 WIND (MPH)         17   19   21   20   18   19   17   17   17   19   18   21   21   26   28   27   24
 WIND GUST (MPH)    39   41   41   40   36   39   36   35   36   39   37   41   41   51   56   55   49
 PRECIP PROB (%)    40   80   80   90   80   60   70   70   70   90   90   90   90   90   90   90   90
 PRECIP TYPE         S    S    S    S    S    S    S    S    S    S    R    R    R    R    R    R    R
 6 HOUR QPF                 0.35      0.59      0.37      0.27      0.33      0.47      0.24      0.36
 6 HOUR SNOW                 2.0       2.4       1.6       1.1       0.7       0.0       0.0       0.0
 6 HOUR ICE                 0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
 SNOW LEVEL (KFT)  6.3  6.7  6.9  7.1  7.2  7.1  7.0  7.1  7.4  7.5  7.9  8.1  8.5  8.4  8.2  8.3  7.9
 
 

--- PRECIP TYPE CODES --- 
CODE   TYPE
 T     THUNDERSTORMS
 R     RAIN
 S     SNOW
 I     SLEET
 Z     FREEZING RAIN