Wyoming Snow Precipitation Update
United States Natural Resources Water and Climate Center
Department of Conservation Portland, Oregon
Agriculture Service
S N O W - P R E C I P I T A T I O N U P D A T E
Based on Mountain Data from NRCS SNOTEL Sites
As of FRIDAY: MAY 11 , 2007
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 .0 8.2 0 21.3 25.3 84
COTTONWOOD CREEK 7600 5.8 15.6 37 25.6 33.2 77
GRANITE CREEK 6770 .0 9.2 0 17.8 23.2 77
GRASSY LAKE 7265 10.8 28.5 38 36.9 42.3 87
GROS VENTRE SUMMIT 8750 3.5 10.9 32 13.9 16.1 86
LEWIS LAKE DIVIDE 7850 11.5 30.6 38 32.9 42.8 77
PHILLIPS BENCH 8200 8.3 25.6 32 25.1 34.2 73
SALT RIVER SUMMIT 7600 -M 6.5 * -M 22.4 *
SNAKE RIVER STATION 6920 .0 7.6 0 23.7 26.4 90
SPRING CREEK DIVIDE 9000 16.5 25.8 64 23.0 31.1 74
THUMB DIVIDE 7980 .1 11.2 1 17.6 22.9 77
TOGWOTEE PASS 9580 15.8 27.5 57 23.4 30.2 77
TWO OCEAN PLATEAU 9240 22.5 31.0 73 25.6 33.5 76
WILLOW CREEK 8450 10.9 26.8 41 34.5 39.3 88
----- -----
Basin wide percent of average 41 80
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 19.2 25.6 75 22.2 24.6 90
BLACK BEAR 8170 22.6 37.5 60 37.8 47.3 80
CANYON 8090 .0 8.3 0 17.9 18.6 96
FISHER CREEK 9100 27.7 36.9 75 33.8 43.4 78
MADISON PLATEAU 7750 9.2 20.8 44 24.5 31.7 77
NORTHEAST ENTRANCE 7350 .0 4.4 0 15.0 15.7 96
PARKER PEAK 9400 13.4 24.1 56 21.6 20.7 104
SYLVAN LAKE 8420 5.1 21.3 24 24.9 26.1 95
THUMB DIVIDE 7980 .1 11.2 1 17.6 22.9 77
TWO OCEAN PLATEAU 9240 22.5 31.0 73 25.6 33.5 76
WHISKEY CREEK 6800 .0 11.3 0 19.9 25.2 79
WHITE MILL 8700 17.3 25.2 69 22.9 32.5 70
WOLVERINE 7650 .0 4.3 0 13.1 16.2 81
----- -----
Basin wide percent of average 52 83
WIND RIVER
BURROUGHS CREEK 8750 7.0 11.3 62 15.1 20.4 74
COLD SPRINGS 9630 .0 3.7 0 12.8 14.9 86
DEER PARK 9700 9.7 17.6 55 21.0 28.3 74
HOBBS PARK 10100 14.6 17.1 85 19.3 18.2 106
LITTLE WARM 9370 1.6 8.7 18 14.2 17.8 80
SOUTH PASS 9040 6.4 15.2 42 18.0 23.8 76
ST. LAWRENCE ALT 8620 .7 4.4 16 13.0 13.1 99
TOGWOTEE PASS 9580 15.8 27.5 57 23.4 30.2 77
TOWNSEND CREEK 8700 1.7 6.7 25 15.8 16.6 95
----- -----
Basin wide percent of average 51 83
BIGHORN BASIN
BALD MTN. 9380 22.5 23.2 97 20.1 22.6 89
BEAR TRAP MEADOW 8200 .0 1.2 0 13.1 12.0 109
BLACKWATER 9780 20.0 28.8 69 23.6 26.1 90
BONE SPRINGS DIV 9350 19.3 16.8 115 23.3 19.6 119
EVENING STAR 9200 16.8 32.7 51 30.6 31.4 97
GRAVE SPRINGS 8550 4.6 8.8 52 11.8 14.1 84
KIRWIN 9550 10.5 11.6 91 17.1 15.3 112
MARQUETTE 8760 1.4 9.6 15 15.8 15.1 105
MIDDLE POWDER 7760 10.4 12.0 87 12.7 16.9 75
OWL CREEK 8975 .0 2.8 0 9.3 9.1 102
POWDER RIVER PASS 9480 4.1 8.8 47 15.8 17.0 93
SHELL CREEK 9580 15.8 16.4 96 17.3 18.0 96
SYLVAN LAKE 8420 5.1 21.3 24 24.9 26.1 95
SYLVAN ROAD 7120 .0 4.2 0 17.9 21.4 84
TIMBER CREEK 7950 .0 2.9 0 12.1 11.8 103
YOUNTS PEAK 8350 6.1 16.2 38 16.1 19.9 81
----- -----
Basin wide percent of average 63 95
SHOSHONE RIVER
BLACKWATER 9780 20.0 28.8 69 23.6 26.1 90
EVENING STAR 9200 16.8 32.7 51 30.6 31.4 97
KIRWIN 9550 10.5 11.6 91 17.1 15.3 112
MARQUETTE 8760 1.4 9.6 15 15.8 15.1 105
SYLVAN LAKE 8420 5.1 21.3 24 24.9 26.1 95
SYLVAN ROAD 7120 .0 4.2 0 17.9 21.4 84
YOUNTS PEAK 8350 6.1 16.2 38 16.1 19.9 81
----- -----
Basin wide percent of average 48 94
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 1.2 0 13.1 12.0 109
BIG GOOSE 7990 9.3 9.8 95 19.0 14.0 136
BONE SPRINGS DIV 9350 19.3 16.8 115 23.3 19.6 119
BURGESS JUNCTION 7880 12.9 11.1 116 19.2 16.4 117
CLOUD PEAK RESERVOIR 9860 15.3 15.2 101 20.1 18.6 108
DOME LAKE 8880 11.7 11.3 104 22.0 18.0 122
GRAVE SPRINGS 8550 4.6 8.8 52 11.8 14.1 84
HANSEN SAWMILL 8360 .0 3.0 0 13.2 12.0 110
MIDDLE POWDER 7760 10.4 12.0 87 12.7 16.9 75
POWDER RIVER PASS 9480 4.1 8.8 47 15.8 17.0 93
SUCKER CREEK 8880 13.4 11.0 122 22.5 18.7 120
TIE CREEK 6870 .0 2.0 0 16.7 14.7 114
----- -----
Basin wide percent of average 91 109
BELLE FOURCHE
BLIND PARK 6890 .0 1.2 0 12.9 15.4 84
COLE CANYON 5910 .0 3.7 0 14.2 -M *
NORTH RAPID CREEK 6130 .0 1.5 0 12.3 12.2 101
----- -----
Basin wide percent of average 0 91
UPPER N. PLATTE RIVER
COLUMBINE 9160 .0 15.3 0 24.3 30.2 80
DIVIDE PEAK 8860 6.4 14.7 44 23.2 25.3 92
ELK RIVER 8700 .2 9.7 2 21.1 24.0 88
JOE WRIGHT 10120 22.3 24.2 92 27.5 31.6 87
NORTH FRENCH CREEK 10130 23.4 33.6 70 28.8 31.2 92
OLD BATTLE 9920 25.6 35.9 71 32.9 41.3 80
SAGE CREEK BASIN 7850 .1 8.5 1 15.0 14.7 102
SOUTH BRUSH CREEK 8440 .0 7.8 0 17.7 21.2 83
TOWER 10500 27.3 51.7 53 37.3 46.7 80
WEBBER SPRINGS 9250 9.5 20.1 47 26.9 32.3 83
WILLOW CREEK PASS 9540 14.8 12.1 122 16.2 16.7 97
----- -----
Basin wide percent of average 55 86
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10220 18.5 24.6 75 24.5 28.3 87
CASPER MTN. 7850 6.2 13.2 47 17.5 21.0 83
DEADMAN HILL 10220 15.7 18.5 85 22.3 22.2 100
DEER PARK 9700 9.7 17.6 55 21.0 28.3 74
LAPRELE CREEK 8375 .1 4.6 2 16.5 17.7 93
RENO HILL 8500 9.6 11.1 86 22.3 21.7 103
ROACH 9700 16.7 14.9 112 24.1 23.7 102
SAND LAKE 10050 27.8 35.9 77 30.7 30.9 99
SOUTH PASS 9040 6.4 15.2 42 18.0 23.8 76
WINDY PEAK 7900 .8 2.6 31 16.1 14.7 110
----- -----
Basin wide percent of average 70 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 1.7 0 15.8 19.3 82
DIVIDE PEAK 8860 6.4 14.7 44 23.2 25.3 92
OLD BATTLE 9920 25.6 35.9 71 32.9 41.3 80
SANDSTONE RS 8150 .7 5.4 13 18.0 22.8 79
WHISKEY PARK 8950 13.7 27.6 50 27.4 35.1 78
----- -----
Basin wide percent of average 54 82
UPPER GREEN RIVER
BIG SANDY OPENING 9080 .5 10.3 5 13.0 16.8 77
BLIND BULL SUM 8900 19.7 25.8 76 19.4 26.1 74
EAST RIM DIVIDE 7930 .0 10.3 0 10.7 14.6 73
ELKHART PARK G.S. 9400 4.8 10.4 46 13.9 17.0 82
GROS VENTRE SUMMIT 8750 3.5 10.9 32 13.9 16.1 86
KENDALL R.S. 7740 .0 5.5 0 14.0 17.2 81
LOOMIS PARK 8240 .1 11.0 1 15.9 20.7 77
NEW FORK LAKE 8340 .0 5.1 0 11.5 14.2 81
SNIDER BASIN 8060 .0 9.1 0 13.8 19.1 72
SPRING CREEK DIVIDE 9000 16.5 25.8 64 23.0 31.1 74
TRIPLE PEAK 8500 8.5 19.0 45 26.6 29.7 90
----- -----
Basin wide percent of average 37 79
LOWER GREEN RIVER
HAMS FORK 7840 .0 2.5 0 12.1 15.4 79
HEWINTA 9500 .0 5.9 0 15.7 18.6 84
HICKERSON PARK 9100 .0 3.1 0 14.1 11.0 128
HOLE-IN-ROCK 9150 .0 2.6 0 12.7 10.5 121
INDIAN CREEK 9425 12.0 25.0 48 20.7 30.5 68
KELLEY R.S. 8180 1.5 10.5 14 18.1 24.4 74
STEEL CREEK PARK 10100 13.6 18.2 75 16.9 21.2 80
----- -----
Basin wide percent of average 40 84
UPPER BEAR RIVER
BUG LAKE 7950 3.5 12.9 27 17.6 23.3 76
HAYDEN FORK 9100 .0 8.9 0 22.5 26.2 86
KELLEY R.S. 8180 1.5 10.5 14 18.1 24.4 74
LILY LAKE 9050 .0 7.7 0 17.8 22.1 81
MONTE CRISTO 8960 8.6 24.3 35 25.0 31.5 79
SALT RIVER SUMMIT 7600 -M 6.5 * -M 22.4 *
TRIAL LAKE 9960 7.5 24.1 31 23.0 30.7 75
----- -----
Basin wide percent of average 24 78
-----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Average Snow Water Equivalent and
Total Precipitation values
If the Basin wide percent of average value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Average represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the average value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the average value for those sites on this day.
Contact your state water supply staff for assistance.
Reference period for average conditions is 1971-2000.
Provisional data, subject to revision.
----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
Units = inches for the Current and Normal Snow Water Equivalent and
Total Precipitation values
If the Basin Index (%) value is flagged as potentially
invalid, care should be taken to evaluate if the value is representative
of conditions in the basin.
The SNOW WATER EQUIVALENT Percent of Median represents the snow water
equivalent found at selected SNOTEL sites in or near the basin compared to
the Median value for those sites on this day.
The TOTAL PRECIPITATION Percent of Average represents the total precipitation
(beginning October 1st) found at selected SNOTEL sites in or near the basin
compared to the Average value for those sites on this day.
Contact your state water supply staff for assistance.
Medians and averages are calculated for the period 1981-2010.
Provisional data, subject to revision.
* Site -- Either: (a) the current value is missing; (b) the median or
average for the day is not available or is zero; or (c) for snow water
equivalent, the median for the day is less than 10% of the maximum
median value for the year.
* Basin - More than half of the sites within the basin are flagged with *,
preventing the calculation of a meaningful basin index.
The basin index is calculated as the sum of the valid current values
divided by the sum of the corresponding medians (for snow water equivalent)
or averages (for precipitation) and the resulting fraction multiplied by 100.