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 TUESDAY: MARCH 31 , 2009
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BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
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WYOMING
SNAKE RIVER
BASE CAMP 7030 15.2 18.1 84 18.9 21.5 88
COTTONWOOD CREEK 7670 26.0 24.0 108 29.4 27.5 107
GRAND TARGHEE 9260 41.6 -M * 32.5 -M *
GRANITE CREEK 6770 16.2 18.7 87 20.3 20.0 102
GRASSY LAKE 7265 31.5 35.8 88 33.7 36.1 93
GROS VENTRE SUMMIT 8750 11.4 14.2 80 15.4 12.9 119
GUNSIGHT PASS 9820 14.7 -M * 15.6 -M *
LEWIS LAKE DIVIDE 7850 -M 35.6 * -M 36.9 *
PHILLIPS BENCH 8200 26.9 29.0 93 28.3 29.1 97
SALT RIVER SUMMIT 7760 14.3 14.5 99 15.5 18.8 82
SNAKE RIVER STATION 6920 16.7 19.2 87 21.6 22.3 97
SPRING CREEK DIVIDE 9000 26.5 26.7 99 25.6 26.5 97
THUMB DIVIDE 7980 18.8 19.1 98 19.7 18.9 104
TOGWOTEE PASS 9580 26.7 24.9 107 28.9 24.6 117
TWO OCEAN PLATEAU 9240 37.5 28.1 133 29.1 27.7 105
WILLOW CREEK 8380 33.3 30.4 110 37.8 32.2 117
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Basin wide percent of average 99 102
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 23.2 23.4 99 21.1 20.1 105
BLACK BEAR 8170 35.6 39.5 90 34.5 40.5 85
CANYON 7870 13.3 13.8 96 14.5 15.4 94
FISHER CREEK 9100 36.5 35.1 104 35.4 36.4 97
MADISON PLATEAU 7750 21.8 25.3 86 23.4 26.8 87
NORTHEAST ENTRANCE 7350 11.0 11.3 97 13.5 12.7 106
PARKER PEAK 9400 25.9 21.7 119 19.4 16.2 120
SYLVAN LAKE 8420 19.9 22.6 88 22.1 20.9 106
THUMB DIVIDE 7980 18.8 19.1 98 19.7 18.9 104
TWO OCEAN PLATEAU 9240 37.5 28.1 133 29.1 27.7 105
WHISKEY CREEK 6800 16.0 17.3 92 19.5 21.0 93
WHITE MILL 8700 24.5 24.4 100 24.0 27.0 89
WOLVERINE 7650 11.7 11.5 102 11.9 12.8 93
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Basin wide percent of average 101 97
WIND RIVER
BURROUGHS CREEK 8750 15.4 14.7 105 16.1 16.2 99
COLD SPRINGS 9630 7.6 8.9 85 10.1 10.5 96
DEER PARK 9700 10.7 16.9 63 15.4 21.8 71
HOBBS PARK 10100 12.5 14.8 84 12.5 12.7 98
LITTLE WARM 9370 11.9 11.9 100 14.6 13.3 110
SOUTH PASS 9040 11.7 16.7 70 14.0 18.3 77
ST. LAWRENCE ALT 8620 5.5 7.3 75 8.9 8.7 102
TOGWOTEE PASS 9580 26.7 24.9 107 28.9 24.6 117
TOWNSEND CREEK 8700 8.2 8.7 94 10.8 11.5 94
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Basin wide percent of average 88 95
BIGHORN BASIN
BALD MTN. 9380 18.8 19.6 96 15.0 17.2 87
BEAR TRAP MEADOW 8200 9.3 5.2 179 9.8 8.1 121
BLACKWATER 9780 24.7 24.6 100 22.2 20.5 108
BONE SPRINGS DIV 9350 17.5 16.2 108 14.2 14.5 98
EVENING STAR 9200 29.8 29.8 100 30.7 25.2 122
GRAVE SPRINGS 8550 9.4 9.4 100 10.2 9.6 106
KIRWIN 9550 12.6 11.3 112 13.9 11.1 125
MARQUETTE 8760 6.5 8.9 73 8.4 9.6 88
MIDDLE POWDER 7760 11.5 11.7 98 10.1 12.2 83
OWL CREEK 8975 5.4 5.5 98 5.4 5.8 93
POWDER RIVER PASS 9480 12.5 10.8 116 14.5 12.2 119
SHELL CREEK 9580 16.8 14.7 114 16.0 13.2 121
SYLVAN LAKE 8420 19.9 22.6 88 22.1 20.9 106
SYLVAN ROAD 7120 13.8 13.0 106 18.6 17.7 105
TIMBER CREEK 7950 4.6 5.8 79 8.3 7.2 115
YOUNTS PEAK 8350 18.0 17.2 105 15.6 16.1 97
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Basin wide percent of average 102 106
SHOSHONE RIVER
BLACKWATER 9780 24.7 24.6 100 22.2 20.5 108
EVENING STAR 9200 29.8 29.8 100 30.7 25.2 122
KIRWIN 9550 12.6 11.3 112 13.9 11.1 125
MARQUETTE 8760 6.5 8.9 73 8.4 9.6 88
SYLVAN LAKE 8420 19.9 22.6 88 22.1 20.9 106
SYLVAN ROAD 7120 13.8 13.0 106 18.6 17.7 105
YOUNTS PEAK 8350 18.0 17.2 105 15.6 16.1 97
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Basin wide percent of average 98 109
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.3 5.2 179 9.8 8.1 121
BIG GOOSE 7990 9.9 10.4 95 12.1 8.4 144
BONE SPRINGS DIV 9350 17.5 16.2 108 14.2 14.5 98
BURGESS JUNCTION 7880 12.4 11.6 107 12.6 12.0 105
CLOUD PEAK RESERVOIR 9860 17.3 13.1 132 15.7 12.6 125
DOME LAKE 8880 13.0 12.2 107 15.3 13.0 118
GRAVE SPRINGS 8550 9.4 9.4 100 10.2 9.6 106
HANSEN SAWMILL 8360 6.7 6.3 106 9.7 8.1 120
MIDDLE POWDER 7760 11.5 11.7 98 10.1 12.2 83
POWDER RIVER PASS 9480 12.5 10.8 116 14.5 12.2 119
SUCKER CREEK 8880 14.5 11.6 125 16.5 13.4 123
TIE CREEK 6870 5.7 5.7 100 13.2 9.7 136
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Basin wide percent of average 112 115
BELLE FOURCHE
BLIND PARK 6890 7.3 8.7 84 14.8 11.0 135
COLE CANYON 5910 7.1 6.8 104 12.2 6.6 185
NORTH RAPID CREEK 6130 10.1 8.2 123 14.3 8.5 168
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Basin wide percent of average 103 158
UPPER N. PLATTE RIVER
COLUMBINE 9160 26.1 25.0 104 26.0 25.1 104
DIVIDE PEAK 8880 23.1 19.8 117 24.5 20.6 119
ELK RIVER 8700 21.6 19.4 111 21.0 19.5 108
JOE WRIGHT 10120 23.6 21.2 111 27.2 24.6 111
NORTH FRENCH CREEK 10130 34.3 29.0 118 31.4 24.5 128
OLD BATTLE 10000 31.8 32.1 99 36.3 34.4 106
SAGE CREEK BASIN 7850 11.4 11.5 99 13.9 12.0 116
SOUTH BRUSH CREEK 8440 13.1 13.0 101 17.0 16.2 105
TOWER 10500 43.2 45.3 95 41.2 38.2 108
WEBBER SPRINGS 9250 24.4 26.3 93 27.6 26.5 104
WILLOW CREEK PASS 9540 12.2 11.9 103 12.2 12.7 96
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Basin wide percent of average 104 109
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.6 23.5 96 20.9 21.8 96
CASPER MTN. 7900 12.0 14.3 84 13.1 14.2 92
DEADMAN HILL 10220 15.7 16.2 97 16.1 16.7 96
DEER PARK 9700 10.7 16.9 63 15.4 21.8 71
LAPRELE CREEK 8375 9.2 10.9 84 11.2 12.5 90
RENO HILL 8400 14.1 14.0 101 14.9 14.7 101
ROACH 9700 14.4 16.9 85 16.6 18.5 90
SAND LAKE 10050 29.5 32.3 91 27.6 23.9 115
SOUTH PASS 9040 11.7 16.7 70 14.0 18.3 77
WINDY PEAK 7900 8.7 8.0 109 9.5 10.4 91
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Basin wide percent of average 88 92
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 16.3 11.2 146 17.9 15.7 114
DIVIDE PEAK 8880 23.1 19.8 117 24.5 20.6 119
OLD BATTLE 10000 31.8 32.1 99 36.3 34.4 106
SANDSTONE RS 8150 17.8 14.9 119 19.9 18.6 107
WHISKEY PARK 8950 32.5 30.2 108 32.8 28.5 115
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Basin wide percent of average 112 112
UPPER GREEN RIVER
BIG SANDY OPENING 9080 11.9 14.5 82 11.6 13.3 87
BLIND BULL SUM 8650 25.8 28.1 92 19.2 22.3 86
EAST RIM DIVIDE 7930 9.6 13.2 73 11.6 12.1 96
ELKHART PARK G.S. 9400 12.4 13.4 93 13.5 13.3 102
GROS VENTRE SUMMIT 8750 11.4 14.2 80 15.4 12.9 119
GUNSIGHT PASS 9820 14.7 -M * 15.6 -M *
KENDALL R.S. 7740 11.3 14.6 77 13.4 14.6 92
LOOMIS PARK 8240 15.8 17.4 91 18.0 17.4 103
NEW FORK LAKE 8340 11.4 11.2 102 10.2 11.3 90
SNIDER BASIN 8060 14.0 14.6 96 14.3 16.1 89
SPRING CREEK DIVIDE 9000 26.5 26.7 99 25.6 26.5 97
TRIPLE PEAK 8500 23.9 25.0 96 25.5 24.8 103
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Basin wide percent of average 90 97
LOWER GREEN RIVER
HAMS FORK 7840 10.5 12.1 87 11.1 12.2 91
HEWINTA 9519 8.8 11.9 74 12.8 14.5 88
HICKERSON PARK 9145 3.7 7.5 49 7.1 7.8 91
HOLE-IN-ROCK 9150 4.5 7.1 63 7.2 7.4 97
INDIAN CREEK 9425 23.8 27.9 85 21.0 25.4 83
KELLEY R.S. 8180 15.6 17.0 92 17.0 20.3 84
STEEL CREEK PARK 10200 11.9 15.7 76 15.2 16.1 94
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Basin wide percent of average 79 88
UPPER BEAR RIVER
BUG LAKE 7950 18.2 21.0 87 17.2 19.2 90
HAYDEN FORK 9212 15.2 16.4 93 20.2 20.9 97
KELLEY R.S. 8180 15.6 17.0 92 17.0 20.3 84
LILY LAKE 9156 13.6 13.1 104 15.8 17.4 91
MONTE CRISTO 8960 25.8 29.9 86 25.3 25.5 99
SALT RIVER SUMMIT 7760 14.3 14.5 99 15.5 18.8 82
TRIAL LAKE 9992 22.7 25.1 90 21.2 24.9 85
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Basin wide percent of average 92 90
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-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.
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-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.