National Weather Service United States Department of Commerce

Heavy Rain and Flash Flooding Threat in Montana; Severe Thunderstorms in the Middle Missouri Valley

A low pressure system will bring heavy to excessive rainfall and high winds across Montana this afternoon. Heavy rainfall totals may lead to scattered flash flooding concerns. A line of showers and strong to severe thunderstorms will move into the mid Missouri Valley region this afternoon producing severe winds and isolated large hail with stronger storms. Read More >

BLUE MOUNTAINS (4,000 FT TO 6,000 FT)
 
 DATE                    WEDNESDAY 09/18/24                      THURSDAY 09/19/24                  
 TIME (LT)          05   08   11   14   17   20   23   02   05   08   11   14   17   20   23   02   05
                    5A   8A   11A  2P   5P   8P   11P  2A   5A   8A   11A  2P   5P   8P   11P  2A   5A   
 
 CLOUD COVER        BK   SC   SC   SC   FW   FW   CL   CL   CL   FW   FW   SC   SC   FW   FW   FW   FW
 CLOUD COVER (%)    60   50   40   40   25   10    5    5    5   10   15   25   30   15   10   15   20
 TEMPERATURE        44   47   54   60   60   51   49   47   45   48   59   65   63   53   50   47   43
 MAX/MIN TEMP                           61                  44                  65                  43
 WIND DIR            W    W    W    W   NW    W    W   SW   SW    S   SW    W    W    W   SW    W    W
 WIND (MPH)          4    4    5    4    3    2    3    3    3    3    3    5    5    4    5    5    5
 WIND GUST (MPH)                                                                                      
 PRECIP PROB (%)     0    0    5    5    0    0    0    0    0    0    0    0    0    0    0    0    0
 PRECIP TYPE                                                                                          
 6 HOUR QPF                 0.00      0.00      0.00      0.00      0.00      0.00      0.00      0.00
 6 HOUR SNOW                 0.0       0.0       0.0       0.0       0.0       0.0       0.0       0.0
 12 HOUR SNOW                          0.0                 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)  9.0  9.3  9.4  9.6  9.6  9.5  9.5  9.2  9.3  9.0  9.2  9.3  9.4  9.2  9.0  8.5  8.2
 
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 --- PRECIP TYPE CODES ---
 
 CODE   TYPE
  T     THUNDERSTORMS
  R     RAIN
  S     SNOW
  I     SLEET
  Z     FREEZING RAIN


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