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: APRIL 18 , 2008
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 -M 16.2 * -M 23.2 *
COTTONWOOD CREEK 7670 26.8 23.3 115 27.2 30.2 90
GRAND TARGHEE 9260 52.1 -M * 36.4 -M *
GRANITE CREEK 6770 18.9 16.4 115 24.5 21.3 115
GRASSY LAKE 7265 38.4 36.8 104 45.2 39.0 116
GROS VENTRE SUMMIT 8750 13.3 14.5 92 15.0 14.3 105
GUNSIGHT PASS 9820 12.8 -M * 15.3 -M *
LEWIS LAKE DIVIDE 7850 38.1 36.6 104 40.0 39.8 101
PHILLIPS BENCH 8200 36.1 30.7 118 37.3 31.5 118
SALT RIVER SUMMIT 7760 13.8 13.9 99 17.1 20.5 83
SNAKE RIVER STATION 6920 20.7 16.8 123 29.1 24.3 120
SPRING CREEK DIVIDE 9000 23.1 28.7 80 25.4 28.8 88
THUMB DIVIDE 7980 19.2 18.2 105 22.2 20.7 107
TOGWOTEE PASS 9580 29.2 27.0 108 31.6 27.2 116
TWO OCEAN PLATEAU 9240 -M 30.9 * -M 30.3 *
WILLOW CREEK 8380 34.7 31.9 109 41.0 35.4 116
----- -----
Basin wide percent of average 106 107
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 27.0 25.5 106 25.6 22.1 116
BLACK BEAR 8170 46.7 41.0 114 44.8 43.8 102
CANYON 7870 18.5 13.4 138 22.1 16.8 132
FISHER CREEK 9100 43.8 37.2 118 40.6 39.7 102
MADISON PLATEAU 7750 31.7 25.9 122 33.8 29.2 116
NORTHEAST ENTRANCE 7350 10.8 10.1 107 14.5 13.9 104
PARKER PEAK 9400 29.0 23.6 123 -M 18.1 *
SYLVAN LAKE 8420 22.6 24.2 93 28.3 23.1 123
THUMB DIVIDE 7980 19.2 18.2 105 22.2 20.7 107
TWO OCEAN PLATEAU 9240 -M 30.9 * -M 30.3 *
WHISKEY CREEK 6800 19.6 17.6 111 26.1 22.9 114
WHITE MILL 8700 29.9 26.1 115 29.6 29.5 100
WOLVERINE 7650 10.5 10.4 101 15.0 14.1 106
----- -----
Basin wide percent of average 113 110
WIND RIVER
BURROUGHS CREEK 8750 16.8 15.0 112 19.9 18.0 111
COLD SPRINGS 9630 6.8 6.3 108 10.9 12.4 88
DEER PARK 9700 17.0 17.5 97 21.9 24.6 89
HOBBS PARK 10100 15.6 16.9 92 16.4 15.1 109
LITTLE WARM 9370 10.8 12.4 87 14.8 15.2 97
SOUTH PASS 9040 15.9 17.7 90 19.0 20.8 91
ST. LAWRENCE ALT 8620 6.7 7.0 96 9.0 10.5 86
TOGWOTEE PASS 9580 29.2 27.0 108 31.6 27.2 116
TOWNSEND CREEK 8700 9.3 9.6 97 13.2 13.8 96
----- -----
Basin wide percent of average 99 99
BIGHORN BASIN
BALD MTN. 9380 17.9 22.1 81 16.9 19.5 87
BEAR TRAP MEADOW 8200 9.0 4.1 220 10.0 9.7 103
BLACKWATER 9780 27.9 27.1 103 25.8 23.0 112
BONE SPRINGS DIV 9350 19.2 17.6 109 19.1 16.6 115
EVENING STAR 9200 32.4 32.3 100 36.3 28.0 130
GRAVE SPRINGS 8550 11.0 10.7 103 11.4 11.7 97
KIRWIN 9550 13.2 12.4 106 15.8 12.8 123
MARQUETTE 8760 7.9 10.6 75 10.9 11.9 92
MIDDLE POWDER 7760 13.3 14.0 95 10.7 14.2 75
OWL CREEK 8975 4.9 5.0 98 7.4 7.1 104
POWDER RIVER PASS 9480 13.6 11.8 115 15.7 14.2 111
SHELL CREEK 9580 17.3 16.2 107 16.7 15.2 110
SYLVAN LAKE 8420 22.6 24.2 93 28.3 23.1 123
SYLVAN ROAD 7120 13.1 11.5 114 22.7 19.3 118
TIMBER CREEK 7950 5.2 5.5 95 8.8 8.9 99
YOUNTS PEAK 8350 18.2 18.2 100 18.9 17.7 107
----- -----
Basin wide percent of average 101 109
SHOSHONE RIVER
BLACKWATER 9780 27.9 27.1 103 25.8 23.0 112
EVENING STAR 9200 32.4 32.3 100 36.3 28.0 130
KIRWIN 9550 13.2 12.4 106 15.8 12.8 123
MARQUETTE 8760 7.9 10.6 75 10.9 11.9 92
SYLVAN LAKE 8420 22.6 24.2 93 28.3 23.1 123
SYLVAN ROAD 7120 13.1 11.5 114 22.7 19.3 118
YOUNTS PEAK 8350 18.2 18.2 100 18.9 17.7 107
----- -----
Basin wide percent of average 99 117
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.0 4.1 220 10.0 9.7 103
BIG GOOSE 7990 10.7 12.5 86 14.0 11.0 127
BONE SPRINGS DIV 9350 19.2 17.6 109 19.1 16.6 115
BURGESS JUNCTION 7880 14.5 13.2 110 15.8 13.9 114
CLOUD PEAK RESERVOIR 9860 17.5 15.4 114 17.3 15.1 115
DOME LAKE 8880 13.2 13.8 96 16.9 15.1 112
GRAVE SPRINGS 8550 11.0 10.7 103 11.4 11.7 97
HANSEN SAWMILL 8360 7.4 5.8 128 10.4 9.6 108
MIDDLE POWDER 7760 13.3 14.0 95 10.7 14.2 75
POWDER RIVER PASS 9480 13.6 11.8 115 15.7 14.2 111
SUCKER CREEK 8880 16.7 13.4 125 18.9 15.6 121
TIE CREEK 6870 8.5 5.4 157 13.4 11.8 114
----- -----
Basin wide percent of average 112 110
BELLE FOURCHE
BLIND PARK 6890 8.9 7.0 127 12.8 12.7 101
COLE CANYON 5910 6.9 7.0 99 9.4 7.9 119
NORTH RAPID CREEK 6130 10.1 8.5 119 10.9 9.8 111
----- -----
Basin wide percent of average 115 109
UPPER N. PLATTE RIVER
COLUMBINE 9160 29.2 24.3 120 31.3 27.6 113
DIVIDE PEAK 8880 26.1 20.9 125 26.2 22.8 115
ELK RIVER 8700 28.4 19.2 148 25.5 21.6 118
JOE WRIGHT 10120 27.6 24.0 115 31.5 27.8 113
NORTH FRENCH CREEK 10130 35.0 33.1 106 33.0 27.4 120
OLD BATTLE 10000 37.9 35.1 108 43.8 37.7 116
SAGE CREEK BASIN 7850 19.7 12.1 163 19.1 13.2 145
SOUTH BRUSH CREEK 8440 15.6 13.1 119 19.2 18.5 104
TOWER 10500 48.1 50.2 96 45.6 42.4 108
WEBBER SPRINGS 9250 30.5 26.1 117 34.3 29.3 117
WILLOW CREEK PASS 9540 20.0 13.9 144 18.9 14.4 131
----- -----
Basin wide percent of average 117 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 24.1 27.0 89 25.2 24.9 101
CASPER MTN. 7900 15.5 17.1 91 16.5 17.2 96
DEADMAN HILL 10220 21.1 18.7 113 22.0 19.2 115
DEER PARK 9700 17.0 17.5 97 21.9 24.6 89
LAPRELE CREEK 8375 8.4 9.8 86 13.3 14.6 91
RENO HILL 8400 15.8 16.0 99 18.4 17.8 103
ROACH 9700 22.0 18.4 120 25.0 20.8 120
SAND LAKE 10050 33.1 35.4 94 33.0 27.1 122
SOUTH PASS 9040 15.9 17.7 90 19.0 20.8 91
WINDY PEAK 7900 10.1 7.6 133 11.7 12.1 97
----- -----
Basin wide percent of average 99 103
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 15.2 8.0 190 18.3 17.4 105
DIVIDE PEAK 8880 26.1 20.9 125 26.2 22.8 115
OLD BATTLE 10000 37.9 35.1 108 43.8 37.7 116
SANDSTONE RS 8150 19.1 12.9 148 23.7 20.4 116
WHISKEY PARK 8950 39.5 30.6 129 39.1 31.5 124
----- -----
Basin wide percent of average 128 116
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.8 15.2 91 14.3 14.7 97
BLIND BULL SUM 8650 27.6 28.9 96 19.2 24.1 80
EAST RIM DIVIDE 7930 9.3 14.0 66 12.0 13.1 92
ELKHART PARK G.S. 9400 11.1 14.0 79 12.6 14.8 85
GROS VENTRE SUMMIT 8750 13.3 14.5 92 15.0 14.3 105
GUNSIGHT PASS 9820 12.8 -M * 15.3 -M *
KENDALL R.S. 7740 11.2 13.2 85 14.7 15.7 94
LOOMIS PARK 8240 16.6 16.8 99 18.9 18.9 100
NEW FORK LAKE 8340 9.6 11.0 87 10.1 12.5 81
SNIDER BASIN 8060 14.2 14.7 97 15.3 17.7 86
SPRING CREEK DIVIDE 9000 23.1 28.7 80 25.4 28.8 88
TRIPLE PEAK 8500 26.6 25.9 103 30.6 27.1 113
----- -----
Basin wide percent of average 90 93
LOWER GREEN RIVER
HAMS FORK 7840 12.5 9.4 133 11.1 13.6 82
HEWINTA 9519 17.2 12.0 143 18.7 16.5 113
HICKERSON PARK 9145 7.6 8.1 94 11.1 9.2 121
HOLE-IN-ROCK 9150 6.7 7.0 96 11.6 8.7 133
INDIAN CREEK 9425 27.4 29.6 93 -M 28.0 *
KELLEY R.S. 8180 16.0 16.9 95 19.1 22.3 86
STEEL CREEK PARK 10200 18.5 17.6 105 20.9 18.7 112
----- -----
Basin wide percent of average 105 104
UPPER BEAR RIVER
BUG LAKE 7950 18.9 21.4 88 18.1 21.1 86
HAYDEN FORK 9212 20.8 16.1 129 25.3 23.5 108
KELLEY R.S. 8180 16.0 16.9 95 19.1 22.3 86
LILY LAKE 9156 16.7 14.1 118 19.9 19.7 101
MONTE CRISTO 8960 31.6 30.4 104 28.3 28.3 100
SALT RIVER SUMMIT 7760 13.8 13.9 99 17.1 20.5 83
TRIAL LAKE 9992 24.2 26.5 91 26.4 27.6 96
----- -----
Basin wide percent of average 102 95
-----------------------------------------------------------------------------
-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 1961-90.
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.