National Weather Service United States Department of Commerce

Slight Risk for Excessive Rainfall and Severe Thunderstorms Thursday

Additional rounds of thunderstorms are expected Thursday and Thursday night across Oklahoma and north Texas, with risks for both large hail and flash flooding. Strong winds may accompany any storms from east Texas northeast through the lower Great Lakes. Read More >

Western and Central Wyoming

Weather Forecast Office

2011-12 Wyoming Water Year Summary

Weather.gov > Western and Central Wyoming > 2011-12 Wyoming Water Year Summary
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Previous Annual and Water Year Climate Summaries

Climate Summaries

2011-12 Water Year Precipitation and Percent of Normal
Station Name Drought Condition on
September 30, 2012		 Oct
2011		 Nov
2011		 Dec
2011		   Jan
2012		 Feb
2012		 Mar
2012		 Apr
2012		 May
2012		 Jun
2012		 Jul
2012		 Aug
2012		 Sep
2012		   Total for
Water Year
to Date
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Big Piney  D2  0.32 T 0.02   0.20 0.11 0.02 0.17 0.38 0.03 1.09 0.17 0.09   2.60
1981-2010 Normals  0.53  0.21  0.30    0.31  0.35  0.44  0.53  0.84 0.79  0.71  0.69  0.78   6.48
Percent of Normal  60 0  7   65 31 5  32 45 4 154 25 12   40
Rank Wettest to Driest                             1st Driest
                               
Buffalo  D2  1.06 0.74 0.27   0.11 0.60 0.06 1.47 2,50 0.73 1.61 0.09 0.13   9.37
1981-2010 Normals  0.93  0.54  0.40    0.42  0.35  0.92  1.30  2.53  2.28  1.66  0.81  1.31   13.45
  Percent of Normal  114  137 68   26 171  7 113 99 32 97 11 10   70
Rank Wettest to Driest                             3rd Driest
                               
Casper   D2 1.44 1.24 0.71   0.67 0.88 0.33 1.01 1.75 0.28 1.01 0.20 0.31   9.83
1981-2010 Normals  1.11 0.76  0.49    0.51  0.57  0.82  1.29  2.02  1.61  1.41  0.85  1.08   12.52
  Percent of Normal  130 163 145   131 154 40 78 87 17 72 24 29   79
Rank Wettest to Driest                             17th Driest
                               
Evanston   D2 0.41 0.52 T   0.09 0.05 0.20  0.42 0.56 T 0.73 0.29  0.78   4.05
  1981-2010 Normals 1.17 1.04 0.58   0.54 0.61 0.86 1.15 1.77 1.24 0.61 0.96 1.31   11.84
  Percent of Normal  35  50 0   17 8  23 37 32 0 120 30 60   34
                               
Greybull   D3 2.48 0.06 0.11   0.03 0.29 0.03 0.51 0.67 0.12 0.10 0.17 0.03   4.60
  1981-2010 Normals  0.60  0.30  0.28    0.23  0.18  0.40  0.71  1.65  1.20  0.66  0.42  0.88   7.51
  Percent of Normal  413 20 39   13 161 8 72 41 10 15 40 3   61
Rank Wettest to Driest                             7th Driest
                               
Lander   D3 1.90 0.99 0.97   0.44 0.87 0.36 1.02 1.84 0.04 0.08 0.03 0.35   8.89
  1981-2010 Normals  1.29  0.86  0.58    0.41  0.58  1.16  1.87  2.20  1.27  0.78 0.61  1.05   12.66
  Percent of Normal  147 115 167   107 150 31 55 84 3 10 5  33   70
Rank Wettest to Driest                             14th Driest
                               
Riverton   D3 1.87 0.48 0.29   0.06 0.41 0.03 0.51 1.05 T 0.04 0.04  0.07   4.85
  1981-2010 Normals  0.89  0.50  0.32    0.24  0.27  0.55  1.30  1.72  1.28  0.89  0.57  0.90   9.43
  Percent of Normal  210 96 90   25 152 5 39 61 0 4 7  8   51
                               
Rock Springs   D3 0.64 1.46 0.11   0.21 0.35 0.08 0.54 0.21 T 1.29 0.01 T   4.90
  1981-2010 Normals  0.87  0.49  0.50    0.45  0.48  0.68  0.91  1.21  0.79  0.64  0.62  0.92   8.56
  Percent of Normal  74 298 22    47 73 12 59 17 0 202 2  0   57
Rank Wettest to Driest                             3rd Driest
                               
Sheridan   D2  3.72  1.14  0.58    0.35  0.94  0.54  1.31  2.42 0.33 0.99 0.11 T   12.43
  1981-2010 Normals  1.41  0.71  0.56    0.56  0.54  0.98  1.60  2.35 2.12  1.18  0.72  1.43   14.16
  Percent of Normal  264 161 104   63  174  55 82  103 16  84 15 0   88
                               
Worland   D3 1.85 0.19 0.13   0.03 0.02 0.05  0.17 1.06 0.01 0.42 0.03 T   3.96
  1981-2010 Normals 0.69 0.35 0.23    0.23 0.19 0.46 0.86 1.42 1.15 0.71 0.43 0.85   7.57
  Percent of Normal  268 54 56    13 11 11 20  75  1 59 7  0   52
Rank Wettest to Driest                             3rd Driest
Station Name Drought
Condition		 Oct
2011		 Nov
2011		 Dec
2011		   Jan
2012		 Feb
2012		 Mar
2012		 Apr
2012		 May
2012		 Jun
2012		 Jul
2012		 Aug
2012		 Sep
2012		   Total for
Water Year
to Date
Bedford 3 SE   D1 1.83 1.82 1.19   2.63 2.02 1.27 3.06 2.92 0.15 0.86 0.12 0.43   18.30
  1981-2010 Normals 1.63 2.04 1.98   2.10 1.76 1.68 1.72 2.61 1.87 1.18 1.32 1.51   21.40
  Percent of Normal  112 89 60   125 115 76 178 112 8 73  9 28   86
                               
Billy Creek D2 1.00 1.13 0.18   0.14 0.60 0.11 0.78 2.72 0.84 0.96 0.14 0.10   8.70
  1981-2010 Normals 0.99 0.43 0.30   0.29 0.35 0.60 1.35 2.40 2.18 1.60 0.88 1.20   12.57
  Percent of Normal  101 263 60   48 171 18 58 113 39 60  16 8   69
Rank Wettest to Driest                             7th Driest
                               
Bitter Creek 4NE   D3 0.48 0.92 0.39   0.01 0.50 0.06 0.30 0.76 T 0.49 0.03  0.65   4.59
  1981-2010 Normals 0.66 0.31 0.51   0.28 0.36 0.30 0.65 1.09 0.70 0.60 0.75 0.73   6.94
  Percent of Normal  73  297  76   4  139 20 46  70 0 82 4 89   66
                               
Fossil Butte
National Monument		   D2 1.50 1.16 0.42   1.00 0.42 0.52 0.71 1.06 T 0.42 0.10  0.76   8.07
  1981-2010 Normals 1.11 0.86 0.74   0.49 0.68 0.82 0.98 1.41 1.03 0.85 0.93 1.10   11.00
  Percent of Normal  135 135 57   204 62 63 72 75 0 49 11 69   73
                               
Green River   D3 1.30 1.60 0.31   0.30 0.48 0.43 0.80 0.30 0.00 0.30 0.32  0.77   6.91
  1981-2010 Normals 0.81 0.41 0.44    0.34  0.43 0.71  0.85 1.23 0.98 0.55  0.68  0.90   8.33
  Percent of Normal  135 390 70   88 112 61 94 24 0 55 47 86   83
                               
Jeffrey City D3 0.47 0.72 0.95   0.43 1.01 0.15 0.65 0.65 T 0.17 0.03 0.04   5.27
  1981-2010 Normals 0.91 0.59 0.42    0.31  0.41 0.86  1.27 1.85 1.15 0.89  0.60  0.80   10.06
  Percent of Normal  52 122 226   139 246 17 51 35 0 19  5 5   52
          Rank Wettest to Driest                              2nd Driest
                               
Moose   D1 1.41 1.25 2.56   2.72 2.00 1.55 0.98 1.62 0.35 1.21 0.28 0.17   16.09
  1981-2010 Normals 1.47 2.64 2.67   2.58 1.82 1.62 1.49 1.88 1.61 1.29 1.29 1.44   21.80
  Percent of Normal  96 47  96   105 109 96 66 86 22 94  22  12   74
                               
Old Faithful  D0 3.48 3.06 1.90   2.17 1.74 4.48 2.95 2.43 0.86 1.21  0.60 2.13   26.64
  1981-2010 Normals 1.66 2.29 3.16   2.11 1.99 2.21 2.21 2.80 2.47 1.55 1.46 1.46   25.37
  Percent of Normal   210 134 60   103 87 203 133 87 35 78 41 146   105
                               
Powell Field Station   D2 1.59 0.42 0.05   0.04 0.21 0.42 0.28 0.98 1.19 0.25 0.02 0.14   5.59
  1981-2010 Normals 0.56 0.18 0.13   0.21 0.13 0.29 0.51 1.40 1.35 0.87 0.52  0.65   6.80
  Percent of Normal  284  233 38   19 162 145 55 70 88 29 4 22   82
                               
Riverton (downtown)   D3 1.66 0.45 0.20   0.19 0.36 0.08 0.40 1.18 T 0.30 0.03 0.21   5.06
  1981-2010 Normals 0.85 0.41 0.24   0.28 0.33 0.56 0.98 1.45 1.21 0.78 0.50 0.83   8.42
  Percent of Normal  195  110 83   68 109 14 41  81 0 38  6 25   60
Rank Wettest to Driest                             3rd Driest
                               
Thermopolis   D3 2.08 0.56 0.27    0.20 0.64 0.40 0.77 0.82 0.01 0.38  0.03 0.09   6.25
  1981-2010 Normals 1.26 0.80 0.46   0.35 0.45 0.87 1.46 1.86 1.51 0.88 0.58 1.23   11.71
  Percent of Normal   165  70 59   57  142  46 53 44 1 43  5 7   53
Rank Wettest to Driest                             2nd Driest
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