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 4 , 2007
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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 .0 11.1 0 21.3 24.7 86
COTTONWOOD CREEK 7600 10.1 18.5 55 25.0 32.3 77
GRANITE CREEK 6770 .1 11.7 1 17.2 22.6 76
GRASSY LAKE 7265 16.7 31.9 52 36.6 41.3 89
GROS VENTRE SUMMIT 8750 6.8 12.6 54 13.6 15.5 88
LEWIS LAKE DIVIDE 7850 16.6 33.4 50 32.5 42.0 77
PHILLIPS BENCH 8200 12.2 28.3 43 24.6 33.4 74
SALT RIVER SUMMIT 7600 .5 9.4 5 15.9 21.8 73
SNAKE RIVER STATION 6920 .0 10.8 0 23.6 25.8 91
SPRING CREEK DIVIDE 9000 18.7 27.8 67 22.5 30.5 74
THUMB DIVIDE 7980 .9 13.8 7 17.2 22.3 77
TOGWOTEE PASS 9580 18.1 27.8 65 23.1 29.4 79
TWO OCEAN PLATEAU 9240 25.7 31.6 81 25.6 32.5 79
WILLOW CREEK 8450 14.9 29.5 51 33.5 38.2 88
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Basin wide percent of average 47 81
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 20.1 25.8 78 21.6 23.8 91
BLACK BEAR 8170 26.7 39.2 68 37.3 46.2 81
CANYON 8090 5.8 10.4 56 17.5 18.0 97
FISHER CREEK 9100 30.5 37.5 81 33.7 42.4 79
MADISON PLATEAU 7750 13.2 23.2 57 24.3 30.8 79
NORTHEAST ENTRANCE 7350 .0 6.3 0 14.9 15.1 99
PARKER PEAK 9400 17.0 24.4 70 20.9 19.9 105
SYLVAN LAKE 8420 11.5 23.1 50 24.7 25.1 98
THUMB DIVIDE 7980 .9 13.8 7 17.2 22.3 77
TWO OCEAN PLATEAU 9240 25.7 31.6 81 25.6 32.5 79
WHISKEY CREEK 6800 5.1 14.0 36 19.0 24.5 78
WHITE MILL 8700 19.1 26.0 73 22.7 31.6 72
WOLVERINE 7650 .0 6.3 0 12.8 15.5 83
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Basin wide percent of average 62 84
WIND RIVER
BURROUGHS CREEK 8750 10.0 12.9 78 15.0 19.6 77
COLD SPRINGS 9630 .0 4.5 0 10.2 14.2 72
DEER PARK 9700 8.9 18.3 49 18.5 27.4 68
HOBBS PARK 10100 11.3 17.7 64 14.9 17.3 86
LITTLE WARM 9370 3.5 10.4 34 12.1 17.1 71
SOUTH PASS 9040 6.8 17.2 40 15.9 23.0 69
ST. LAWRENCE ALT 8620 .1 5.6 2 10.4 12.4 84
TOGWOTEE PASS 9580 18.1 27.8 65 23.1 29.4 79
TOWNSEND CREEK 8700 .0 8.4 0 12.3 15.8 78
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Basin wide percent of average 48 75
BIGHORN BASIN
BALD MTN. 9380 21.6 23.5 92 18.9 21.7 87
BEAR TRAP MEADOW 8200 .0 2.1 0 11.8 11.2 105
BLACKWATER 9780 20.7 28.8 72 22.3 25.1 89
BONE SPRINGS DIV 9350 17.3 17.9 97 19.7 18.7 105
EVENING STAR 9200 19.7 33.1 60 30.1 30.3 99
GRAVE SPRINGS 8550 3.7 10.4 36 9.3 13.4 69
KIRWIN 9550 9.8 12.6 78 14.2 14.5 98
MARQUETTE 8760 .0 10.8 0 12.4 14.1 88
MIDDLE POWDER 7760 9.0 13.6 66 11.3 16.1 70
OWL CREEK 8975 .0 3.6 0 8.4 8.5 99
POWDER RIVER PASS 9480 5.9 10.1 58 14.9 16.2 92
SHELL CREEK 9580 14.9 16.7 89 15.5 17.2 90
SYLVAN LAKE 8420 11.5 23.1 50 24.7 25.1 98
SYLVAN ROAD 7120 .0 6.9 0 17.7 20.8 85
TIMBER CREEK 7950 .0 4.2 0 10.6 10.9 97
YOUNTS PEAK 8350 8.7 17.5 50 15.8 19.1 83
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Basin wide percent of average 61 91
SHOSHONE RIVER
BLACKWATER 9780 20.7 28.8 72 22.3 25.1 89
EVENING STAR 9200 19.7 33.1 60 30.1 30.3 99
KIRWIN 9550 9.8 12.6 78 14.2 14.5 98
MARQUETTE 8760 .0 10.8 0 12.4 14.1 88
SYLVAN LAKE 8420 11.5 23.1 50 24.7 25.1 98
SYLVAN ROAD 7120 .0 6.9 0 17.7 20.8 85
YOUNTS PEAK 8350 8.7 17.5 50 15.8 19.1 83
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Basin wide percent of average 53 92
POWDER-TONGUE
BEAR TRAP MEADOW 8200 .0 2.1 0 11.8 11.2 105
BIG GOOSE 7990 5.8 11.1 52 14.0 13.2 106
BONE SPRINGS DIV 9350 17.3 17.9 97 19.7 18.7 105
BURGESS JUNCTION 7880 10.6 12.6 84 15.8 15.7 101
CLOUD PEAK RESERVOIR 9860 12.6 15.9 79 15.9 17.5 91
DOME LAKE 8880 8.7 12.8 68 17.5 17.2 102
GRAVE SPRINGS 8550 3.7 10.4 36 9.3 13.4 69
HANSEN SAWMILL 8360 .0 4.3 0 11.4 11.3 101
MIDDLE POWDER 7760 9.0 13.6 66 11.3 16.1 70
POWDER RIVER PASS 9480 5.9 10.1 58 14.9 16.2 92
SUCKER CREEK 8880 10.7 12.5 86 18.6 17.8 104
TIE CREEK 6870 .0 3.3 0 13.6 13.9 98
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Basin wide percent of average 67 95
BELLE FOURCHE
BLIND PARK 6890 .3 3.2 9 11.7 14.6 80
COLE CANYON 5910 .0 4.8 0 11.0 -M *
NORTH RAPID CREEK 6130 .0 3.1 0 10.4 11.7 89
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Basin wide percent of average 3 84
UPPER N. PLATTE RIVER
COLUMBINE 9160 .2 19.2 1 23.5 29.5 80
DIVIDE PEAK 8860 8.4 17.9 47 21.8 24.6 89
ELK RIVER 8700 .3 13.4 2 19.8 23.3 85
JOE WRIGHT 10120 21.0 24.8 85 26.2 30.6 86
NORTH FRENCH CREEK 10130 23.8 34.2 70 27.6 30.1 92
OLD BATTLE 9920 24.9 36.6 68 31.2 40.3 77
SAGE CREEK BASIN 7850 .2 10.4 2 14.0 14.3 98
SOUTH BRUSH CREEK 8440 .0 10.1 0 15.9 20.4 78
TOWER 10500 27.8 52.1 53 36.2 45.6 79
WEBBER SPRINGS 9250 10.5 23.6 44 25.4 31.4 81
WILLOW CREEK PASS 9540 14.6 13.6 107 15.2 16.0 95
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Basin wide percent of average 51 84
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10220 18.4 27.1 68 23.2 27.4 85
CASPER MTN. 7850 4.3 15.9 27 14.4 19.9 72
DEADMAN HILL 10220 15.4 19.3 80 20.9 21.4 98
DEER PARK 9700 8.9 18.3 49 18.5 27.4 68
LAPRELE CREEK 8375 .2 6.3 3 13.7 16.8 82
RENO HILL 8500 8.1 13.6 60 18.3 20.6 89
ROACH 9700 16.6 17.4 95 22.8 22.8 100
SAND LAKE 10050 26.6 36.7 72 28.8 29.8 97
SOUTH PASS 9040 6.8 17.2 40 15.9 23.0 69
WINDY PEAK 7900 .7 4.2 17 13.5 13.8 98
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Basin wide percent of average 60 85
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .0 3.7 0 14.6 18.8 78
DIVIDE PEAK 8860 8.4 17.9 47 21.8 24.6 89
OLD BATTLE 9920 24.9 36.6 68 31.2 40.3 77
SANDSTONE RS 8150 .6 8.3 7 16.9 22.2 76
WHISKEY PARK 8950 14.9 29.6 50 26.5 34.2 77
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Basin wide percent of average 51 79
UPPER GREEN RIVER
BIG SANDY OPENING 9080 4.2 12.5 34 12.8 16.2 79
BLIND BULL SUM 8900 22.3 27.3 82 19.1 25.5 75
EAST RIM DIVIDE 7930 .0 12.3 0 10.5 14.1 74
ELKHART PARK G.S. 9400 7.9 12.1 65 13.7 16.3 84
GROS VENTRE SUMMIT 8750 6.8 12.6 54 13.6 15.5 88
KENDALL R.S. 7740 .0 8.7 0 13.5 16.8 80
LOOMIS PARK 8240 .0 13.3 0 15.7 20.2 78
NEW FORK LAKE 8340 .5 7.4 7 10.2 13.6 75
SNIDER BASIN 8060 3.2 11.6 28 13.0 18.7 70
SPRING CREEK DIVIDE 9000 18.7 27.8 67 22.5 30.5 74
TRIPLE PEAK 8500 11.9 22.3 53 25.6 28.9 89
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Basin wide percent of average 45 79
LOWER GREEN RIVER
HAMS FORK 7840 .0 5.0 0 11.5 14.9 77
HEWINTA 9500 -M 8.3 * 14.9 18.0 83
HICKERSON PARK 9100 -M 4.9 * 12.3 10.4 118
HOLE-IN-ROCK 9150 -M 4.1 * 11.4 9.9 115
INDIAN CREEK 9425 14.0 27.3 51 19.7 29.8 66
KELLEY R.S. 8180 5.2 13.0 40 17.3 23.9 72
STEEL CREEK PARK 10100 13.3 18.5 72 15.6 20.5 76
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Basin wide percent of average 51 81
UPPER BEAR RIVER
BUG LAKE 7950 5.2 16.5 32 16.4 22.7 72
HAYDEN FORK 9100 .0 11.8 0 21.5 25.4 85
KELLEY R.S. 8180 5.2 13.0 40 17.3 23.9 72
LILY LAKE 9050 .2 10.1 2 16.3 21.4 76
MONTE CRISTO 8960 10.6 27.1 39 24.1 30.7 79
SALT RIVER SUMMIT 7600 .5 9.4 5 15.9 21.8 73
TRIAL LAKE 9960 10.0 25.8 39 22.4 29.8 75
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Basin wide percent of average 28 76
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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 1971-2000.
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.