National Weather Service United States Department of Commerce

Atmospheric River to Begin to Impact the Northwest U.S.; Gusty Winds in the Northeast U.S.

A strong atmospheric river moving into northern California later Tuesday will bring a threat for moderate to heavy rainfall and flooding, gusty to high winds, and mountain snows for parts of the Northwest U.S. through at least Wednesday. Gusty winds and isolated rain and snow showers will continue in the Northeast U.S. Tuesday behind a cold front. Read More >

Western and Central Wyoming

Weather Forecast Office

2012 - Wyoming Annual Climate Summary

Weather.gov > Western and Central Wyoming > 2012 - Wyoming Annual Climate Summary
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Previous Annual and Water Year Climate Summaries

Climate Summaries

2012 Precipitation and Percent of Normal
Station Name Drought  Condition
at end of 2012		 Jan
2012		 Feb
2012		 Mar
2012		   Apr
2012		 May
2012		 Jun
2012		 Jul
2012		 Aug
2012		 Sep
2012		 Oct
2012		 Nov
2012		 Dec
2012		   Total for 2012
click on location   D0 D1                              
 for graph D2 D3 D4                              
Big Piney  D2 0.20 0.11 0.02   0.17 0.38 0.03 1.09 0.17 0.09  0.24 0.15 0.04   2.69
1981-2010 Normals  0.31  0.35  0.44    0.53  0.84 0.79  0.71  0.69  0.78  0.53  0.21  0.30   6.48
Percent of Normal  65 31 5   32 45 4 154 25 12 45 71  13   42
                               
Buffalo D2 0.11 0.60 0.06   1.47 2.50 0.73 1.61 0.09 0.13  0.77 0.75 0.08   8.90
1981-2010 Normals  0.42  0.35  0.92    1.30  2.53  2.28  1.66  0.81  1.31  0.93  0.54  0.40   13.45
  Percent of Normal  26 171 7   113 99 32 97 11 10 83 139  20   66
                               
Casper D3 0.67 0.88 0.33   1.01 1.75 0.28 1.01 0.20 0.31 0.56 0.49 0.39   7.88
1981-2010 Normals  0.51  0.57  0.82    1.29  2.02  1.61  1.41  0.85  1.08  1.11 0.76  0.49   12.52
  Percent of Normal  131 154 40   78 87 17 72 24 29 50 64  80   63
Rank Driest to Wettest (top 10)     6th       9th               6th
73 Years,  P.O.R 12/1939 - 2012                              
Evanston   D2 0.09 0.05 0.20    0.42 0.56 T 0.73 0.29  0.78 1.59 0.52 0.12   5.35
  1981-2010 Normals 0.54 0.61 0.86   1.15 1.77 1.24 0.61 0.96 1.31 1.17 1.04 0.58   11.84
  Percent of Normal  17 8 23   37 32 0 120 30 60 136 50   21   45
                               
Greybull   D3 0.03 0.29 0.03   0.51 0.67 0.12 0.10 0.17 0.03 0.06 0.21 0.13   2.35
  1981-2010 Normals  0.23  0.18  0.40    0.71  1.65  1.20  0.66  0.42  0.88  0.60  0.30  0.28   7.51
  Percent of Normal  13 161 8   72 41 10 15 40 3 10 70   46   31
                               
Lander   D3 0.44 0.87 0.36   1.02 1.84 0.04 0.08 0.03 0.35 0.68 0.49 0.40   6.60
  1981-2010 Normals  0.41  0.58  1.16    1.87  2.20  1.27  0.78 0.61  1.05  1.29  0.86  0.58   12.66
  Percent of Normal  107 150 31   55 84 3 10 5  33 53 57  69   52
Rank Driest to Wettest (top 10)     9th       5th 9th 5th           3rd
121 Years, P.O.R. 1892-2012                              
Riverton   D3 0.06 0.41 0.03   0.51 1.05 T 0.04 0.04  0.07 0.34 0.32 0.41   3.28
  1981-2010 Normals  0.24  0.27  0.55    1.30  1.72  1.28  0.89  0.57  0.90  0.89  0.50  0.32   9.43
  Percent of Normal  25 152 5   39 61 0 4 7  8 38 64  128   35
                               
Rock Springs   D3 0.21 0.35 0.08   0.54 0.21 T 1.29 0.01 T 0.07  0.17 0.08   3.01
  1981-2010 Normals  0.45  0.48  0.68    0.91  1.21  0.79  0.64  0.62  0.92  0.87  0.49  0.50   8.56
  Percent of Normal   47 73 12   59 17 0 202 2  0 8  35 16   35
Rank Driest to Wettest (top 10)     3rd     6th 1st   1st 1st 6th   4th   1st
65 Years, P.O.R. 1948-2012                               
Sheridan   D2  0.35  0.94  0.54    1.31  2.42 0.33 0.99 0.11 T  0.95 1.09 0.50   9.53
  1981-2010 Normals  0.56  0.54  0.98    1.60  2.35  2.12  1.18  0.72  1.43  1.41  0.71  0.56   14.16
  Percent of Normal  63 174 55   82 103 16 84 15 0 67 154  89   67
                               
Worland   D3 0.03 0.02 0.05    0.17 1.06 0.01 0.42 0.03 T 0.26  0.60 0.26   2.91
  1981-2010 Normals 0.23 0.19 0.46   0.86 1.42 1.15 0.71 0.43 0.85 0.69 0.35 0.23   7.57
  Percent of Normal  13 11 11   20  75  1 59 7  0 38  171 113   38
Rank Driest to Wettest 6th  5th 4th   5th   1st   4th 1st         1st
53 Years, P.O.R. 1960-2012                              
Station Name Drought Condition at the end of 2012 Jan
2012		 Feb
2012		 Mar
2012		   Apr
2012		 May
2012		 Jun
2012		 Jul
2012		 Aug
2012		 Sep
2012		 Oct
2012		 Nov
2012		 Dec
2012		   Total for 2012
Bedford 3 SE   D1 2.63 2.02 1.27   3.06 2.92 0.15 0.86 0.12 0.43 2.20 2.27 3.61   21.54
  1981-2010 Normals 2.10 1.76 1.68   1.72 2.61 1.87 1.18 1.32 1.51 1.63 2.04 1.98   21.40
  Percent of Normal  125 115 76   178 112 8 73  9 28 135 111  182   101
                               
Billy Creek D2 0.14 0.60 0.11   0.78 2.72 0.84 0.96 0.14 0.10 0.78 1.11 0.29   8.57
  1981-2010 Normals 0.29 0.35 0.60   1.35 2.40 2.18 1.60 0.88 1.20 0.99 0.43 0.30   12.57
  Percent of Normal  48 171 18   58 113 39 60 16 8 79 258  97   68
                               
Bitter Creek 4NE   D3 0.01 0.50 0.06   0.30 0.76 T 0.49 0.03  0.65 0.38 0.34 0.18   3.70
  1981-2010 Normals 0.28 0.36 0.30   0.65 1.09 0.70 0.60 0.75 0.73 0.66 0.31 0.51   6.94
  Percent of Normal  4  139 20   46  70 0 82 4 89 58 110   35   53
                               
Fossil Butte
National Monument		   D2 1.00 0.42 0.52   0.71 1.06 T 0.42 0.10  0.76 1.62 0.81 1.69   9.11
  1981-2010 Normals 0.49 0.68 0.82   0.98 1.41 1.03 0.85 0.93 1.10 1.11 0.86 0.74   11.00
  Percent of Normal  204 62 63   72 75 0 49 11 69 146 94  2.28   83
                               
Green River D3 0.30 0.48 0.43   0.80 0.30 0.00 0.30 0.32  0.77 1.00 1.05 0.97   6.72
  1981-2010 Normals  0.34  0.43 0.71    0.85 1.23 0.98 0.55  0.68  0.90 0.81 0.41 0.44   8.33
  Percent of Normal  88 112 61   94 24 0 55 47 86 123 256  220   81
                               
Jeffrey City D3 0.43 1.01 0.15   0.65 0.65 T 0.17 0.03 0.04 0.43 0.31 0.20   4.07
  1981-2010 Normals  0.31  0.41 0.86    1.27 1.85 1.15 0.89  0.60  0.80 0.91 0.59 0.42   10.06
  Percent of Normal  139 246 17   51 35 0 19  5 5 47 53   48   40
                               
Moose D0 2.72 2.00 1.55   0.98 1.62 0.35 1.21 0.28 0.17 2.16 2.19 3.58   18.80
  1981-2010 Normals 2.58 1.82 1.62   1.49 1.88 1.61 1.29 1.29 1.44 1.47 2.64 2.67   21.80
  Percent of Normal  105 109 96   66 86 22 94  22  12 147  83  134   86
                               
Old Faithful  D0 2.17 1.74 4.48   2.95 2.43 0.86 1.21  0.60 2.13 2.64 1.31 4.29   26.44
  1981-2010 Normals 2.11 1.99 2.21   2.21 2.80 2.47 1.55 1.46 1.46 1.66 2.29 3.16   25.37
Percent of Normal  103 87 203   133 87 35 78 41 146 159 57  136   104
                               
Powell Field Station   D3 0.04 0.21 0.42   0.28 0.98 1.19 0.25 0.02 0.14 0.24 0.09 0.15   4.01
  1981-2010 Normals 0.21 0.13 0.29   0.51 1.40 1.35 0.87 0.52  0.65 0.56 0.18 0.13   6.80
  Percent of Normal  19 162 145   55 70 88 29 4 22 43  50 115   59
                               
Riverton (downtown)   D3 0.19 0.36 0.08   0.40 1.18 T 0.30 0.03 0.21 0.36 0.52 0.35   3.98
  1981-2010 Normals 0.28 0.33 0.56   0.98 1.45 1.21 0.78 0.50 0.83 0.85 0.41 0.24   8.42
  Percent of Normal  68 109 14   41  81 0 38  6 25 42 127   146   47
Rank Driest to Wettest (top 10)     8th       2nd               2nd
106 Years, P.O.R. 1907-2012                              
Thermopolis   D3  0.20 0.64 0.40   0.77 0.82 0.01 0.38  0.03 0.09 0.66 0.17 0.38   4.55
  1981-2010 Normals 0.35 0.45 0.87   1.46 1.86 1.51 0.88 0.58 1.23 1.26 0.80 0.46   11.71
  Percent of Normal  57  142  46   53 44 1 43  5 7  52  21  83   39
                               
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