WFO Denver/Boulder



Developmental Probabilistic Snow Accumulation Forecast
National Weather Service Denver/Boulder, Colorado
2323 MST Saturday, January 31, 2015

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This developmental product contains the probabilities (%) that the given snow
amounts (inches) will occur at Denver International Airport during the respec-
tive 6- or 12-hour periods.  The probabilities indicate the amount of snow that
will fall from the clouds.  They do not consider the amount of melting that may
or may not occur on various ground surfaces. [T (trace) means more than zero.]
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Short Term Discussion (01/00Z-02/00Z): Heavier snow has developed than earlier
anticipated over dia.  The heaviest snow remains just west of the airport
however just enough to increase snowfall amounts tonight to 1 to 2 inches
likely and up to 3 inches on the edge of the heavier bands of snow.  The main
threat of accumulating snow will occur through 3 AM.  Northeast winds will blow
at 12 to 25 mph.  Temperatures will drop into the mid 20s by later tonight.

                 0"   T or    1" or    3" or    6" or   10" or
Day/Hour GMT          more     more     more     more     more
            --------------------------------------------------
01/00-01/06 |    0     100       10        0
01/06-01/12 |    0     100       60       20
01/00-01/12 |                                       0        0
01/12-01/18 |   80      20        0        0
01/18-02/00 |  100       0        0        0
01/12-02/00 |                                       0        0

Long Term Discussion (02/00Z-03/00Z): No snow is expected during the period.

                 0"   T or    1" or    3" or    6" or   10" or
Day/Hour GMT          more     more     more     more     more
            --------------------------------------------------
02/00-02/06 |  100       0        0        0
02/06-02/12 |  100       0        0        0
02/00-02/12 |                                       0        0
02/12-02/18 |  100       0        0        0
02/18-03/00 |  100       0        0        0
02/12-03/00 |                                       0        0

Deterministic Forecast for Denver International Airport created at
2316 MST Saturday, January 31, 2015

Valid at  Sky  PoP  CWR   T  Td  AT  RH   Wind(mph)    QPF  Snow  Tx RHn  Tn RHx
MM/DD:UT    %    %    %   F   F   F   %  Dir  Sp  Gs  inch  inch   F   %   F   %
================================================================================
02/01:00   88   18    4  34  30  31  85  WSW   3   3  ----  ----                
02/01:01   86   18    4  33  30  33  89  WSW   2   2    |     |                 
02/01:02   66   17    3  32  29  32  87    N   1   1    |     |                 
02/01:03   66   22    3  32  29  32  89   NE   2   2  0.10   1.0                
02/01:04   66   35    3  33  30  30  88  NNE   3   3    |     |                 
02/01:05   90   76    9  32  31  26  95    N   7   7    |     |                 
02/01:06   90   81   21  31  28  23  90    N   9  14  ----  ----                
02/01:07   96   81   35  29  26  20  86    N  12  17    |     |                 
02/01:08   99   81   37  28  23  17  83    N  13  20    |     |                 
02/01:09   98   68   40  27  22  16  81    N  14  21  0.12   1.2                
02/01:10   92   56   26  26  21  15  80  NNE  13  20    |     |                 
02/01:11   80   43    8  25  19  14  79  NNE  10  16    |     |                 
02/01:12   74   30    6  24  18  14  80  NNE   9  14  ----  ----                
02/01:13   74   25    5  22  18  12  81  NNE   9  10    |     |                 
02/01:14   74   20    4  22  17  12  83  NNE   9   9    |     |           22  95
02/01:15   63   17    3  22  17  12  81   NE   9  12  0.01   0.1                
02/01:16   63   14    3  24  17  14  74   NE   9   9    |     |                 
02/01:17   63   10    2  26  16  17  66   NE   8   8    |     |                 
02/01:18   52    6    1  29  16  21  58   NE   8   8  ----  ----                
02/01:19   52   10    2  31  16  24  52   NE   8   8    |     |                 
02/01:20   52   10    2  33  16  26  49   NE   8   8    |     |                 
02/01:21   60   10    2  34  16  27  46   NE   8  10  0.00   0.0                
02/01:22   60   10    2  33  16  26  47  ENE   8   8    |     |                 
02/01:23   60   10    2  31  15  24  51    E   7   7    |     |   34  46        
02/02:00   49    2    0  28  15  22  58  ESE   7   7  ----  ----                
02/02:01   49    2    0  26  16  18  66  ESE   7   7    |     |                 
02/02:02   49    2    0  23  17  15  75   SE   7   7    |     |                 
02/02:03   53    2    0  22  17  13  83  SSE   8   8  0.00   0.0                
02/02:04   53    2    0  22  17  12  84  SSE   9   9    |     |                 
02/02:05   53    2    0  23  18  13  81    S   9  14    |     |                 
02/02:06   52    0    0  23  18  13  78    S  10  16  ----  ----                
02/02:07   52    0    0  25  18  14  74    S  10  16    |     |                 
02/02:08   52    0    0  26  18  16  71  SSW  10  16    |     |                 
02/02:09   52    0    0  26  18  16  71  SSW  10  16  0.00   0.0                
02/02:10   52    0    0  26  18  16  71  SSW  10  16    |     |                 
02/02:11   52    0    0  26  18  16  72   SW  10  15    |     |                 
02/02:12   55    2    0  26  18  16  72   SW  10  15  ----  ----                
02/02:13   55    2    0  27  19  17  71   SW  10  14    |     |                 
02/02:14   55    2    0  30  19  21  65   SW  10  14    |     |           22  84
02/02:15   55    2    0  34  20  26  56   SW  10  15  0.00   0.0                
02/02:16   55    2    0  40  21  33  47  WSW  10  16    |     |                 
02/02:17   55    2    0  46  21  40  38  WSW  12  17    |     |                 
02/02:18   57    2    0  51  22  50  32    W  12  17  ----  ----                
02/02:19   57    2    0  55  22  55  28    W  12  17    |     |                 
02/02:20   57    2    0  57  23  57  26  WNW  12  16    |     |                 
02/02:21   57    2    0  57  23  57  27  WNW  10  16  0.00   0.0                
02/02:22   57    2    0  56  23  56  28  WNW   9  15    |     |                 
02/02:23   57    2    0  54  23  54  30  WNW   9   9    |     |   57  26        
02/03:00   39    4    1  51  23  51  33    W   8   9  ----  ----                
________________________________________________________________________________
Sky= Amount of sky covered by opaque clouds (percent)
PoP= Probability of receiving .01 inch or more liquid (melted, if frozen) precip
CWR= Probability of receiving .10 inch or more liquid (melted, if frozen) precip
T  = Air temperature (degrees Fahrenheit)
Td = Dew point temperature (degrees Fahrenheit)
AT = Apparent temperature (wind chill or heat index; degrees Fahrenheit)
RH = Relative humidity (percent)
Dir= Compass direction from which the wind is blowing (e.g. NE= northeast)
Sp = Wind speed (miles per hour)
Gs = Wind gust speed (miles per hour)
QPF= Liquid precip amount (inches) expected thru the 6-hour period between ----
Snow= Snow amount (inches) expected during the 6-hour period between ---
Tx = Maximum temperature (F) during the period ending at the given hour
RHn= Minimum relative humidity (%) during the period ending at the given hour
Tn = Minimum temperature (F) during the period ending at the given hour
RHx= Maximum relative humidity (%) during the period ending at the given hour

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