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Drought Monitor Graphics:
Drought Monitor for Wyoming Drought Monitor for West Drought Monitor - 12 Week Animation

Category

Description

Possible Impacts

D0

Abnormally
Dry

Going into drought: short-term dryness slowing planting, growth of crops or pastures. Coming out of drought: some lingering water deficits;  pastures or crops not fully recovered

D1

Moderate Drought

Some damage to crops, pastures; streams, reservoirs, or wells low, some water shortages developing or imminent; voluntary water-use restrictions requested

D2

Severe
Drought

Crop or pasture losses likely;  water shortages common; water restrictions imposed

D3

Extreme Drought

Major crop/pasture losses;  widespread water shortages or restrictions

D4

Exceptional Drought

Exceptional and widespread crop/pasture losses; shortages of water in reservoirs, streams, and wells creating water emergencies
May 2012 May 2003
  The 2012 Drought in Colorado, Utah and Wyoming compared to 2002 (.pdf file)
Drought Monitor for West - May 2012 Drought Monitor for West - May 2003
  Top
River and Streamflow Conditions
Wyoming Water Supply Outlook

 
Fire Weather Impacts
Observed Fire Danger Class Seasonal Significant WIldland Fire Potential Outlook
Wildland Fire Assessment System National Wildland Fire Significant Fire Potential Outlook (.pdf file)
  Top
 Climate Summary

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      
  
  
   0.87
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   2.67
Percent of Normal 
45 71  13   23 26 7  47      
  
  
   33
                               
Buffalo  D2  0.77 0.75 0.08   0.48 0.13 0.08 0.83      
  
  
   3.12
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   4.86
  Percent of Normal  83
 139 20
  114
 37
9  64
    
  
 
   64
                               
Casper  D2 0.56 0.49 0.39   0.27 0.50 0.85 2.54             5.60
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   5.55
  Percent of Normal  50
64
80
  53
88
 104
  197
 
  
  
  
   101
Snowfall  5.2 7.5
6.0
  4.5
9.5
10.5
 39.0             82.2
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
  70.1
  Percent of Normal  70
73
55
  49
97
96
 336             117
                               
Evanston   D1 1.59 0.52 0.12   0.11 0.36 0.41 0.92      
       4.03
  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   5.95
  Percent of Normal  136
  50 21
   20
 59
  48 80
  
 
  
  
   68
                               
Greybull   D3 0.06 0.21 0.13   0.28 0.14 0.09 0.38             1.29
  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   2.70
  Percent of Normal  10
70
46
  122  78 23 54             48
                               
Lander  D2 0.68 0.49 0.40   0.70 1.28 0.42 3.14             7.11
  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   6.75
  Percent of Normal  53 57
69
  171 221  36 168             105
Snowfall  5.6 4.8
5.3
   12.7
23.8
5.1
 43.3             100.6
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
  83.8
  Percent of Normal  57
37
52
  167
 231
 32
 258             120
                               
Riverton  D2 0.34 0.32 0.41   0.11 0.54 0.11 1.30             3.13
  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   4.07
  Percent of Normal  38 64
128
   46 200 20  100             77
Snowfall  1.1 1.4
4.8
  2.7
8.8
1.1
 15.9             35.8
                               
Rock Springs   D2 0.07 0.17 0.08   M M M M             M
  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   2.79
  Percent of Normal  8
 35 16
   M M M M             M
                               
Sheridan   D2  0.95  1.09 0.50    0.96 0.79 0.27 2.27             6.83
  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   6.36
  Percent of Normal  67
154
 89
  171 146 28  142        
  107
                               
Worland   D3 0.26 0.60 0.26   0.13 0.26 0.20 0.98             2.69
  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   3.01
  Percent of Normal  38
 171
 113
   57 137 43  114             89
                               
Station Name Drought
Condition		 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             9.85
  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   9.79
  Percent of Normal  92 95 170   60 62  93 130             101
Snowfall  7.0 12.8
31.1
   16.8
 15.3
13.7
 7.0             103.7
                               
Billy Creek D2 0.78 1.11 0.29   0.34 0.19 0.08 0.80             3.59
  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   4.31
  Percent of Normal  79
 258
 97
  117  54 13 59           83
Rank Wettest to Driest                            
Snowfall 3.2 11.6 4.2   3.8 2.5 0.7  6.6             32.6
1981-2010 Normals 3.0 4.2
5.3   4.7 5.8 6.4 6.3 1.3 0.0 0.0 0.0 0.7   35.7
  Percent of Normal  107 276 79   81 43 11  105             91
                               
Bitter Creek 4NE  D2 0.38 0.34 0.18   0.30 0.59 0.22 0.50             2.51
  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   3.07
  Percent of Normal  58
 110 35   107  164  73 77          
   82
                               
Fossil Butte
National Monument		   D2 1.62 0.81 1.69   0.19 0.66 0.39 0.64             6.00
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   5.68
  Percent of Normal  146
94
228   39
  97 48  65          
   100
Snowfall 10.0
 6.5 18.6   6.1 12.4  6.8 9.9             70.3
                               
Green River
  D2 1.00 1.05 0.97   0.10 0.55 0.45 0.75             4.87
  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   3.99
  Percent of Normal  123 256 220   29  128  63 88             122
Snowfall 4.0
5.0 8.3   1.3 5.2  3.5  4.3             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   31.6
Percent of Normal
800 132 128   28 71  70  110             100
                               
Jeffrey City  D2 0.43 0.31 0.20   0.06 0.99 0.15 2.13             4.27
  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   4.77
  Percent of Normal  47 53
48
  19  241  17  168        
  90
Snowfall 3.0 2.0 3.0   1.0 12.0 2.0  26.0             49.0
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   50.3
  Percent of Normal  41 30 55   22 179 21  255             97
                               
Moose
 D0 2.16 2.19 3.58   1.17 0.74 1.23 1.79             12.86
  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   14.29
  Percent of Normal  147 83
  134   45  41  76  120             90
Snowfall 1.8 10.2 33.9   19.7 19.5  13.1  7.0             105.2
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   160.4
  Percent of Normal  38 42 76   53 73  82  95             66
                               
Old Faithful
 D0 2.64 1.31 4.29   1.68 0.49 2.01 2.46             14.88
  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   15.63
  Percent of Normal   159 57
 136
   80  25  91  111           95
Snowfall 14.0
11.5
49.5
  38.5
9.0
27.0
 21.0             170.5
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   197.9
  Percent of Normal  182
36
113
  103
29
 101  109             86
                               
Powell Field Station
  D3 0.24 0.09 0.15   0.29 0.07 0.15 0.39             1.38
  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   2.01
  Percent of Normal  43 50 115
   138  54  52  76           69
Snowfall 0.0
1.0
2.0
  2.6
T
 T  1.0             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
  9.5
  Percent of Normal  0
77
167
  113
0
 0  200             69
                               
Riverton (downtown)
  D2 0.36 0.52 0.35   0.21 0.45 0.17 1.48             3.54
  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   3.65
  Percent of Normal  42
 127 146
   75  136  30  151        
  97
Snowfall 3.2
3.5
 6.1
  3.8
8.9
 4.3  24.7             54.5
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   35.6
  Percent of Normal  86
81
127
  79
148
 73  405             153
                               
Thermopolis  D2 0.66 0.17 0.38    0.37 0.59 0.51 0.95             3.63
  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   5.65
  Percent of Normal   52  21 83   106  131  59  65             64
Snowfall 1.0
6.0
4.0
  5.5
5.0
 2.0  11.5             35.0
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
  26.1
  Percent of Normal  42
162
89
  98  109  80  411             134
 XX.X / M - Data partially or completely missing
 

April 2013 Percent of Normal Precipitation (%) - Wyoming
Statewide averages and ranks for periods including April 2013 will be available on May 15, 2013 

Statewide Average:  ."     |     Rank:     |     20th Century Average: 1.36"
119 year period, driest April on record: 1987, 0.35"
Wyoming April Percent of Normal Precipitation
 
April 2013 Departure from Normal Temperature (°F) - Wyoming
Statewide Average: .°F     |     Rank: XX Warmest     |     20th Century Average: 39.7°F
  119 year period; warmest April on record: 1943, 46.6°F
April 2013 Departure from Normal Temperature (F)
 
 February - April 2013 Percent of Normal Precipitation (%) - Wyoming
Statewide Average: ."     |     Rank:     |     20th Century Average: 2.91"
119 year period; driest period on record: 1979, 1.83"
Wyoming - February 2013 through April 2013 Percent of Normal Precipitation
 
Water Year to Date: October 2012 - May 1, 2013
Percent of Normal Precipitation (%) - Wyoming
Statewide Average (Oct 2012-Apr 2013):  ."     |     Rank: XXth Driest   |     20th Century Average: 6.04"
118 year period; driest period on record: Oct 1965- Apr 1966, 3.75"
Wyoming - Water Year to Date: October 1, 2012 through May 1, 2013 Percent of Normal Precipitation
 
Last 12 Months May 1, 2012 - April 30, 2013
Percent of Normal Precipitation (%) - Wyoming
Statewide Average: ."     |     Rank:       |     20th Century Average: 13.14"
118 year period; driest period on record:  May 1900 - Apr 1901, 7.83"
Wyoming: Last 12 Months - May 2012 - April 2013 Percent of Normal Precipitation
 
Last 12 Months  May 1, 2012 - April 30, 2013
Departure from Normal Temperature (°F) - Wyoming
Statewide Average: .°F     |     Rank:     |     20th Century Average: 41.5°F
118 year period; warmest period on record: May 1933 - Apr 1934, 45.2°F
Wyoming: May 2012 - April 2013 Depature from Normal Temperature
 
Monthly and Seasonal Temperature, Precipitation and Drought Outlooks
Monthly and Seasonal Outlook
U.S. Seasonal Drought Outlook
 
Snowpack and Reservoir Levels

 Percent of Average Snow Water Equivalent by Basin

Map of Percent of Snow Water Equivalent by Basin - Wyoming
 

Major Storage Reservoirs in Central Wyoming

Bureau of Reclamation, Great Plains Region  

Map of Snowpack and Reservoir Levels
 
Storage Reservoirs in the Upper Green River Basin
Bureau of Reclamation, Upper Colorado Region
Upper Green River Drainage Basin
 
  Major Storage Reservoirs in the Upper Snake River Basin
Bureau of Reclamation, Pacific Northwest Region
Pacific NW Region - Upper Snake River Basin

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