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Areas of Severe Thunderstorms and Excessive Rainfall Thursday

Severe thunderstorms capable of large to very hail and damaging winds are possible from parts of the northern High Plains into lower elevations of the northern and central Plains Thursday afternoon into night. Thunderstorms with heavy to excessive rainfall may produce flooding over a part of the Midwest Thursday. Read More >

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2014-15 - Wyoming Water Year Summary

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2014-2015 Water Year Precipitation and Percent of Normal for Selected Stations
Station Name:
Airports		 Drought
Conditions		 Oct
2014		 Nov
2014		 Dec
2014		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		   Total for
Water Year
 click on location   D0 D1                              
 for graph D2 D3 D4                              
Big Piney  D0 0.09 0.05 0.12   0.01 0.05 0.06 0.56 2.30 0.23 1.73 0.39 0.30   5.89
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   17  24  40    3  14 14 106 274 29 244 57 38    91
                               
Buffalo None 0.21 0.34 0.08    0.16 0.48 0.08 0.78 5.76 3.23 0.77 1.15 0.11   13.15
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   23  63  20    38  137 9 60 228 142 46 142 8    98
                               
Casper   None 1.05 0.81 1.25   0.52 0.79 0.64 1.66 3.89 1.50 0.57 0.83 0.19   13.70
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   95  107  255    102 139 78 129 193 93 40 98 18    109
Snowfall  3.2  10.6 17.8   6.4  12.4 9.3 4.7 6.3 0.0 0.0 0.0 0.0   70.7
1981-2010 Normals 7.4  10.3 11.0   9.1 9.8 10.9 11.6 2.9 0.1 0.0 0.0 1.8   74.9
  Percent of Normal   43 103  162    70  127 85 41 217 0 0 0 0    94
                               
Evanston   D0 0.11 0.59 0.18   0.64 0.37 0.44 0.57 4.49 0.64 0.88 0.88 0.88   10.67
  1981-2010 Normals 1.17 1.04 0.58   0.54 0.61 0.86 1.15 1.77 1.24 0.90 0.96 1.31    12.13
  Percent of Normal   9  57  31    119  61 51 50 254 52 98 92 67    88
                               
Greybull   None 0.01 0.59 0.21   0.22 0.04 0.14 0.11 1.07 0.25 T 0.09 0.01   2.74
  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  2 197  75    96 22 35 15 65 21 0 21 1   36
                               
Station Name:
Airports		 Drought
Conditions		 Oct
2014		 Nov
2014		 Dec
2014		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		   Total for
Water Year
Lander  None 0.50 0.59 1.82   T 1.56 0.55 2.31 6.10 0.80 0.50 0.58 0.17   15.48
  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   39  69  209    0  269 47 124 277 63 64 95 16    122
Snowfall  T  8.9  21.1    0.3  23.6 8.9 10.3 0.8 0.0 0.0 0.0 0.0   73.9
1981-2010 Normals 9.8  13.1 10.1   7.6 10.3 16.1 16.8 4.8 0.1 0.0 0.0 2.7    91.4
  Percent of Normal   0  68 209    4  229 55 61 17 0 0 0 0   81
                               
Riverton  None 0.16 0.42 0.65   0.03 1.04 0.41 0.82 4.55 0.79 1.10 0.06 0.02    10.05
  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   18  84  203    13  385 75 63 265 62 124 11 2   107
Snowfall  17.5  1.5  6.8    0.4  15.8 6.7 3.3 0.5 0.0  0.0 0.0 0.0    38.8
                               
Rock Springs  None 0.32 0.13 0.11   0.01 0.08 0.22 0.67 3.10 1.11 2.12 0.37 0.58   8.82
 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  37  27 22    0.4  17 32 74 256 141 331 60 63    103
                               
Sheridan   None 0.16 1.49  0.74   0.45 1.28 0.40 1.43 5.42 3.05 0.84 0.60 0.27   16.13
  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   11  210  132    80  237 41 89 231 144 71 83 19    114
                               
Worland None 0.27 0.57  0.70   0.23 0.54 T 0.35 3.06 1.06 0.41 0.47 0.13    7.79
  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   39  163  304    100  284 0 41 215 92 58 109 15    103
                               
Station Name:
COOPS		 Drought
Conditions		 Oct
2014		 Nov
2014		 Dec
2014		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		   Total for
Water Year
                               
                               
Afton  D0 0.65 1.56 1.48   0.58 0.88 0.62 1.47 4.84 1.36 1.53 1.22 2.20   18.39
  1981-2010 Normals 1.63 2.04 1.25   1.40 1.09 1.40 1.54 2.26 1.97 1.43 1.25 1.46   18.16
  Percent of Normal   40 105  118   41  81 44 95 214 69 107 98 151   101
Snowfall  0.2  13.9  24.2    9.6  6.5 5.9 6.7 0.0 0.0 0.0 0.0 0.0   67.0
                               
Bitter Creek 4NE None 0.17 0.53 0.34   0.09 0.13 0.70 0.34 3.82 1.54 2.57 0.13 0.61   10.95
  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   26  171 67    32 36 233 52 350 220 428 17 84    158
                               
Cody  None 0.42 1.54 1.29   0.10 0.87 0.20 1.66 5.10 0.92 0.52 0.52 0.13   13.27
  1981-2010 Normals 0.89 0.48 0.33   0.33 0.33 0.56 1.06 1.82 1.68 1.11 0.91 1.06    10.56
  Percent of Normal   47  321  391    30  264 36 157 280 55 47 57 12    126
Snowfall  0.0  19.0  14.0    2.0  7.0 1.5 4.0 0.0 0.0 T 0.0 0.0   47.5
1981-2010 Normals 4.3 6.3 8.0   7.8 6.7 6.9 6.3 0.8 0.0 0.0 0.0 0.2   47.3
  Percent of Normal  0  302  175    26  104 22 63 0 0 0 0 0    100
                               
Dubois  None 0.40 1.00 0.69   0.15 0.46 0.35 0.55 3.28 1.31 1.62 0.88 0.30    10.99
  1981-2010 Normals 0.81 0.57 0.28   0.24 0.38 0.40 1.10 1.64 1.28 1.11 0.86 1.24    9.91
  Percent of Normal  49  175  246    63  121 88 50 200 102 146 102 24    111
Snowfall 1.0  13.5  16.5    2.0  10.6 5.5 4.5 T 0.0 0.0 0.0 0.0   53.6
1981-2010 Normals 3.0 5.8 5.1   3.9 5.7 6.0 8.5 3.9 0.6 0.0 0.0 2.6   45.1
  Percent of Normal  33  233  324    51  186 92 53 0 0 0 0 0   119
                               
Fossil Butte
National Monument		   D0 0.52 0.55 0.78    0.23 0.51 0.68 0.61 4.90 0.81 0.70 1.18      11.47
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    9.90
  Percent of Normal  47  64  105   47  75 83 62 348 79 82 127      116
Snowfall T  7.8  10.7    2.2  4.3 6.0 5.7 3.0 0.0 0.0 0.0      39.7
                               
Green River  None 0.36 0.38 1.07   T 0.30 0.92 1.52 4.67 1.44 1.10 0.74 1.28    13.08
  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  44  93  243   0  70 130 179 380 147 200 109 116    157
Snowfall 0.0  T  9.8   T  2.0 7.0 6.5 T 0.0 0.0 0.0 0.0    25.3
1981-2010 Normals 0.5 3.8 6.5   4.6 7.3 5.0 3.9 0.6 0.0 0.0 0.0 0.0   32.2
Percent of Normal 0  0  151   0  27 140 167 0 0 0 0 0    79
                               
Station Name:
COOPS		 Drought
Conditions		 Oct
2014		 Nov
2014		 Dec
2014		   Jan
2015		 Feb
2015		 Mar
2015		 Apr
2015		 May
2015		 Jun
2015		 Jul
2015		 Aug
2015		 Sep
2015		   Total for
Water Year
Jeffrey City  None 0.11 0.21 1.21   0.20 0.40 0.79 1.94 4.70 0.67 1.00 0.29 0.39    11.91
  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  12  36  288   65  98 92 153 254 58 112 48 49    118
Snowfall 0.0  2.1  16.0   3.0  7.0 9.0 20.0 7.0 0.0 0.0 0.0 0.0   64.1
1981-2010 Normals 7.3 6.6 5.5   4.6 6.7 9.4 10.2 4.9 0.4 0.0 0.0 1.4    57.0
  Percent of Normal  0  32 291   65  104 96 196 143 0 0 0 0    112
                               
Kaycee  None 0.51 0.56 0.77   0.32 0.87 0.02 1.16 6.00 1.03 0.74 0.47 0.00    12.45
  1981-2010 Normals 1.04 0.57 0.31   0.30 0.34 0.74 1.46 2.37 1.84 1.42 0.80 1.18    12.37
  Percent of Normal  49  98  248    107  256 3 79 253 56 52 59 0    101
Snowfall T  8.5  10.0    3.5  12.0 T T 3.0 0.0 0.0 0.0 0.0   37.0
1981-2010 Normals 1.5 4.2 6.0   5.9 6.3 8.0 4.7 0.6 0.1 0.0 0.0 0.2   37.5
  Percent of Normal  0  202  167    59  190 0 0 500 0 0 0 0   99
                               
Moose   D0 0.54  3.55 3.26   2.31 1.57 0.67 0.80 3.83 1.03 2.72 1.56 2.65    24.49
  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  37  134  122   90  86 41 54 204 64 211 121 184   112
Snowfall T  43.3  39.6    26.0  19.1 11.0 5.4 0.0 0.0 0.0 0.0 0.0    144.4
1981-2010 Normals 4.8 24.1 44.7   36.9 26.6 15.9 7.4 2.2 0.0 0.0 0.0 0.2    162.8
  Percent of Normal  0  180  89    70  72 69 73 0 0 0 0 0   89
                               
Old Faithful  D0 1.73 2.49 2.46   1.23 0.75 0.77 0.94 3.75 1.24 2.14 1.58 2.65   21.73
  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   104  109 78    58  38 35 43 134 50 138 108 182   86
Snowfall 2.0  20.0  36.3    30.0  6.0  1.0 3.5 T 0.0 0.0 0.0 0.0    98.8
1981-2010 Normals 7.7 31.7 43.8   37.5 31.1 26.8 19.3 7.3 1.2 0.0 0.0 1.4    207.8
  Percent of Normal  26  63  83    80  19 4 18 0 0 0 0 0   48
                               
Powell Field Station   None 0.22 0.43 0.10   0.04 0.03 0.09 0.39 2.13 0.60 0.32 0.47 T    4.82
  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  39 239 77    19  23 31 76 152 44 37 90 0   71
Snowfall 0.0  3.8  1.3    0.3  0.3 0.1 T 0.0 0.0 0.0 0.0 0.0   5.8
1981-2010 Normals  1.2 1.3 1.2   2.3 0.5 2.5 0.5 0.5 0.0 0.0 0.0 0.1   10.1
  Percent of Normal  0  292  108    13  60 4 0 0 0 0 0 0    57
                               
Riverton (downtown)  None 0.18 0.41 0.55   0.04 1.28 0.47 1.10 4.03 0.82 0.81 0.17 0.10   9.96
  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  21  100 229    14  388 84 112 278 68 104 34 12    118
Snowfall T  7.8  7.4    0.7  17.8 6.6 1.8 T 0.0 0.0 0.0 0.0   42.1
1981-2010 Normals 3.7 4.3 4.8    4.8  6.0  5.9  6.1 1.2 0.0 0.0 0.0 0.3   37.1
  Percent of Normal  0  181  154    15  297 112 30 0 0 0 0 0   113
                               
Thermopolis   None 0.22 0.37 2.04   0.14 0.92 0.06 1.60 4.54 1.50 0.38  0.70 T   12.47
  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   17  46  443    40  204 7 110 244 99 43 121 0    106
Snowfall 0.0  9.0  23.0    3.0  3.5 1.0 T 0.0 0.0 0.0 0.0 0.0    39.5
1981-2010 Normals 2.4 3.7 4.5   5.6  4.6 2.5 2.8 0.4 0.0 0.0 0.0 0.2   26.7
  Percent of Normal  0 243 511    54  76 40 0 0 0 0 0 0    148

Drought Classifications on September 1, 2015     |      XX.X / M - Data partially or completely missing

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