2012-2013 Wyoming Water Year Summary

2012-2013 Wyoming Water Year Summary




The official water year begins Oct 1.  Riverton Forecast Office
 has prepared a comprehensive  review of the water Year that
 just ended.   For comparison the CoCoRaHS site at Star Valley
Ranch received  24.18 inches of precipitation which included 
172.5 inches of snow. This amount exceeds any of the stations
reporting with Old Faithful being next  with 22.61 
and coincidently exactly the same amount of snow of 172.5 inches.





2012-13 Water Year Precipitation and Percent of Normal for Selected Stations

Station Name Drought
Conditions
Oct
2012
Nov
2012
Dec
2012
Jan
2013
Feb
2013
Mar
2013
Apr
2013
May
2013
Jun
2013
Jul
2013
Aug
2013
Sep
2013
Total for
Water Year
to Date
 click on location D0 D1
 for graph D2 D3 D4
Big Piney  D2  0.24 0.15 0.04 0.07 0.09 0.03 0.25 1.26 T 0.89  0.41  0.83  4.26
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   45 71  13 23 26 7  47 150 0  125  59  106 66
Buffalo   D1  0.77 0.75 0.08 0.48 0.13 0.08 0.83 1.61 0.95 0.11  0.23   3.34 9.36
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  83   139 20  114 37  9  64  64  42  28  255 70
Casper   D1 0.56 0.49 0.39 0.27 0.50 0.85 2.54 1.81 0.87 1.66  0.70   1.47 12.11
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  50  64  80  53  88 104  197 90 54  118  82  136 97
Snowfall  5.2 7.5  6.0  4.5  9.5  10.5   39.0  3.5  0.0   0.0  0.0  4.8 90.5
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  70  73  55  49  97  96   336  121  0  0  0  267 121
Evanston   D1 1.59 0.52 0.12 0.11 0.36 0.41 0.92 0.21 T 0.20  0.16   1.48 6.08
  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  136  50 21 20   59  48 80  12 0  33  17  113 51
Greybull   D1 0.06 0.21 0.13 0.28 0.14 0.09 0.38 1.01 0.40 0.32 T  1.11 4.13
  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  10  70  46  122  78 23 54  61  33  48 0  126 55
Lander   D0 0.68 0.49 0.40 0.70 1.28 0.42 3.14 1.98 0.05 0.28 0.01  3.78 13.21
  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  53 57  69  171 221  36 168  90 4  36  360 104
Snowfall  5.6 4.8  5.3 12.7  23.8  5.1   43.3  10.5 0.0   0.0  0.0  4.1 115.2 
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  57  37  52  167 231 32   258  219  0  0  152 126
Riverton   D0 0.34 0.32 0.41 0.11 0.54 0.11 1.30 1.38 0.05 0.54 0.03  3.01 8.14
  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  38 64  128 46 200 20  100  80 4 61  5  334 86
Snowfall  1.1 1.4  4.8  2.7  8.8  1.1   15.9  2.4 0.0  0.0   0.0 7.3  45.5 
Rock Springs  D2 0.07 0.17 0.20 0.05 0.32 0.19 0.37 0.56  0.21 0.50  1.37 4.01
 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  8 35 40 11 67 28 41 46 0 33  81  149 47
Sheridan   D0  0.95  1.09 0.50  0.96 0.79 0.27 2.27 3.03 2.19 0.43 0.05  4.26 16.79
  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  67  154 89  171 146 28  142  129 103 36  7 298 119
Worland  D1 0.26 0.60 0.26 0.13 0.26 0.20 0.98 1.12 0.09 0.30 0.13  2.63 6.96
  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  38 171 113   57 137 43  114  79 8  42  30  309 92
Station Name Drought
Conditions
Oct
2012
Nov
2012
Dec
2012
Jan
2013
Feb
2013
Mar
2013
Apr
2013
May
2013
Jun
2013
Jul
2013
Aug
2013
Sep
2013
Total for
Water Year
to Date
Afton   D1 1.50 1.40 2.13 0.84 0.68 1.30 2.00 2.43 0.10 1.53 0.40  2.81 17.12
  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  92 95 170 60 62  93 130  108 5 107  32  192 94
Snowfall  7.0 12.8  31.1 16.8 15.3  13.7   7.0  1.0 0.0  0.0   0.0  0.3 105.0 
Bitter Creek 4NE  D2 0.38 0.34 0.18 0.30 0.59 0.22 0.50 0.63 0.02 0.15 0.28 1.29 4.88
  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  58 110 35 107  164  73 77  58  3 25  37 177  70
Cody  D0 0.34 0.52 0.59 0.30 0.19 0.31 0.95 3.22 0.35 0.76 0.38  2.54 10.45
  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  38 108 179 91 58 55 90 177  21 68  42 240 99
Snowfall 0.0 3.0 6.0 4.0 3.0 1.0 7.2 0.0 0.0 0.0  0.0 0.0 24.2
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 48 75 51 45 14  114 0  0  0 0 51
Dubois   D0 1.53 0.48 0.31 0.35 0.33 0.46 0.60 1.57 0.05 1.22 0.60  3.17 10.67
  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  189 84 111  146  87 115 55 96  4  110  70 256 108
Snowfall 5.3 5.0 5.5 7.0 7.3 6.5 10.0 0.5 0.0 0.0  0.0  3.5 50.6
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  177 86 108 179 128 108  118 13  0  0  0  135 112
Fossil Butte
National Monument
  D2 1.62 0.81 1.69 0.19 0.66 0.39 0.64 1.33  0.06 0.49 0.71 2.77 11.36
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  146  94  228 39  97 48  65  94 6 58  76  252 103
Snowfall 10.0 6.5 18.6 6.1 12.4  6.8 9.9 T 0.0  0.0  0.0  T 70.3 
Green River   D2 1.00 1.05 0.97 0.10 0.55 0.45 0.75 1.41 0.05 0.05 0.55 2.09 9.02
  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  123 256 220 29  128  63 88  115  5  9  81  232 108
Snowfall 4.0  5.0 8.3 1.3 5.2  3.5  4.3  T 0.0 0.0  0.0  T 31.6 
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  800 132 128 28 71  70  110  0 0  0  0  0 98
Jeffrey City   D0 0.43 0.31 0.20 0.06 0.99 0.15 2.13 2.64 0.08 0.24 0.21  3.18 10.62
  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  47 53  48  19  241  17  168  143 7 27  35 398 106
Snowfall 3.0 2.0 3.0 1.0 12.0 2.0  26.0  6.0  0.0 0.0 0.0  9.0 64.0
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  41 30 55 22 179 21  255  122 0  0 0  643 112
Kaycee   D1 0.28 0.75 0.19 0.26 0.07 0.59 1.25 1.13  0.56 0.60 0.43  2.32 8.43
  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  27 132 61  87  21 80 86 48 30 42  54 197 68
Snowfall 0.1 4.0 6.0 3.0 3.0 3.0 15.5  T 0.0 0.0  0.0  4.0 38.6
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  7 95 100 51 48 38  330 0  0  0  2000 103
Moose    D1 2.16 2.19 3.70 1.17 0.74 1.23 1.79 1.59 0.22 1.70 0.49  2.59 19.57
  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  147 83  139 45  41  76  120  85  14 132  38  180 90
Snowfall 1.8 10.2 33.9 19.7 19.5  13.1  7.0  2.6 0.0 0.0  0.0  T 107.8 
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  38 42 76 53 73  82  95  118 0  0  0  0 66 
Old Faithful   D0 2.64 1.31 4.29 1.68 0.49 2.01 2.46 1.27 0.98 0.65 0.97  3.86 22.61
  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   159 57 136 80  25  91  111  45 40 42  66 264 89
Snowfall 14.0  11.5  49.5  38.5  9.0  27.0   21.0  T 0.0  0.0   0.0  2.0 172.5
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  182  36  113  103  29   101  109  0  0  143 83 
Powell Field Station    D0 0.24 0.09 0.15 0.29 0.07 0.15 0.39 1.99 0.16 1.45 0.26 2.27 7.51
  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  43 50 115 138  54  52  76  142  12  167  50 349 110
Snowfall 0.0  1.0  2.0  2.6   T  1.0  0.0 0.0  0.0   0.0  0.0 6.6
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  77  167  113   0  200  0  0  0  0  0 65 
Riverton (downtown)   D0 0.36 0.52 0.35 0.21 0.45 0.17 1.48 1.54 0.02 0.38 0.05 3.09 8.62
  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  42   127 146 75  136  30  151  106  2 49  10 372 102
Snowfall 3.2  3.5 6.1  3.8  8.9   4.3  24.7  6.7  0.0 0.0  0.0  5.7 66.9
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  86  81  127  79  148   73  405  558  0 0  0  1900 180
Thermopolis   D1 0.66 0.17 0.38  0.37 0.59 0.51 1.33 2.72 0.19 0.26 0.09 3.16 10.43
  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   52  21 83 106  131  59  91  146 13 30  16  257 89
Snowfall 1.0  6.0  4.0  5.5  5.0   2.0  11.5  T 0.0  0.0   0.0  2.0 37.0 
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  42  162  89  98  109  80  411  0  0  0  1000 139 
 XX.X / M – Data partially or completely missing

Wyoming Climate
Statewide averages and ranks for periods including September 2013 will be available on October 15, 2013
Last Month
Precipitation – Percent of Normal Temperature – Departure from Normal
Wyoming: Last Month Percent of Normal Precipitation Wyoming: Last Month Departure from Normal Temperature
Statewide Average (inches) Statewide Average (°F)
20th Century Average 20th Century Average
Rank – Driest to Wettest (119 Years) Rank – Warmest to Coldest (119 Years)
Driest Year on Record: 1944
Warmest Year on Record: 2003
Last 3 Months
Precipitation – Percent of Normal Temperature – Departure from Normal
Wyoming: Last Three Months Percent of Normal Precipitation Wyoming: Last 3 Months Departure from Normal Temperature
Statewide Average (inches) Statewide Average (°F)
20th Century Average 20th Century Average
Rank – Driest to Wettest (119 Years) Rank – Warmest to Coldest (119 Years)
Driest Year on Record: 2012 Warmest Year on Record: 2012
  
Water Year
Precipitation – Percent of Normal Temperature – Departure from Normal
Wyoming: Water Year Percent of Normal Precipitation Wyoming: Water Year Departure from Normal Temperature
Statewide Average (inches) Statewide Average (°F)
20th Century Average 20th Century Average
Rank – Driest to Wettest (119 Years) Rank – Warmest to Coldest (119 Years)
Driest Period on Record: Oct 1918 – Aug 1919 Warmest Period on Record: Oct 1933 – Aug 1934
  
Last 12 Months
Precipitation – Percent of Normal Temperature – Departure from Normal
Wyoming: Last 12 Months Percent of Normal Precipitation Wyoming: Last 12 Months Departure from Normal Temperature
Statewide Average (inches) Statewide Average (°F)
20th Century Average 20th Century Average
Rank – Driest to Wettest (119 Years)
Rank – Warmest to Coldest (119 Years)
Driest Period on Record: Sep 1987 – Aug 1988 Warmest Period on Record: Aug 1933 – Aug 1934

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