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 WEDNESDAY: APRIL 23 , 2003
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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 12.5 14.6 86 23.5 23.7 99
COTTONWOOD CREEK 7600 18.0 21.8 83 25.8 30.8 84
GRANITE CREEK 6770 9.0 14.9 60 17.9 21.8 82
GRASSY LAKE 7265 30.2 35.2 86 35.0 39.7 88
GROS VENTRE SUMMIT 8775 12.5 13.9 90 12.6 14.7 86
LEWIS LAKE DIVIDE 7860 32.4 35.7 91 32.1 40.4 79
PHILLIPS BENCH 8200 -M 30.0 * -M 32.1 *
SALT RIVER SUMMIT 7600 7.6 12.5 61 14.9 20.9 71
SNAKE RIVER STATION 6920 8.8 14.8 59 22.7 24.7 92
SPRING CREEK DIVIDE 9000 -M 28.6 * -M 29.3 *
THUMB DIVIDE 7980 12.0 16.8 71 18.0 21.2 85
TOGWOTEE PASS 9580 24.9 27.3 91 25.7 27.9 92
TWO OCEAN PLATEAU 9360 34.1 31.2 109 28.5 31.0 92
WILLOW CREEK 8450 25.0 31.2 80 35.9 36.3 99
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Basin wide percent of average 84 88
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 28.0 25.7 109 24.6 22.6 109
BLACK BEAR 8170 35.8 40.4 89 33.4 44.5 75
CANYON 8090 12.0 12.6 95 15.8 17.1 92
FISHER CREEK 9100 37.4 37.4 100 36.3 40.5 90
MADISON PLATEAU 7750 20.4 25.1 81 22.3 29.5 76
NORTHEAST ENTRANCE 7350 6.1 8.9 69 14.5 14.3 101
PARKER PEAK 9400 26.8 23.9 112 21.9 18.7 117
SYLVAN LAKE 8420 -M 24.0 * -M 23.7 *
THUMB DIVIDE 7980 12.0 16.8 71 18.0 21.2 85
TWO OCEAN PLATEAU 9360 34.1 31.2 109 28.5 31.0 92
WHISKEY CREEK 6800 11.4 16.5 69 17.0 23.4 73
WHITE MILL 8700 28.3 26.2 108 25.3 30.2 84
WOLVERINE 7650 7.2 9.1 79 13.4 14.6 92
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Basin wide percent of average 95 88
WIND RIVER
BURROUGHS CREEK 8750 17.5 14.3 122 20.0 18.5 108
COLD SPRINGS 9630 3.6 5.9 61 11.1 13.0 85
DEER PARK 9700 14.6 17.9 82 19.4 25.7 75
HOBBS PARK 10100 13.4 17.4 77 14.6 15.8 92
LITTLE WARM 9370 7.5 11.8 64 12.1 15.9 76
SOUTH PASS 9040 12.2 17.9 68 15.6 21.6 72
ST. LAWRENCE ALT 8620 4.1 6.7 61 9.5 11.2 85
TOGWOTEE PASS 9580 24.9 27.3 91 25.7 27.9 92
TOWNSEND CREEK 8700 7.9 9.4 84 13.2 14.5 91
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Basin wide percent of average 82 86
BIGHORN BASIN
BALD MTN. 9380 18.1 22.8 79 18.3 20.3 90
BEAR TRAP MEADOW 8200 2.2 3.6 61 9.1 10.2 89
BLACKWATER 9780 27.2 27.9 97 23.8 23.6 101
BONE SPRINGS DIV 9350 18.7 18.0 104 18.0 17.3 104
EVENING STAR 9200 30.9 32.6 95 33.8 28.7 118
GRAVE SPRINGS 8550 5.7 10.9 52 8.7 12.2 71
KIRWIN 9550 12.7 12.7 100 13.9 13.4 104
MARQUETTE 8760 12.8 10.9 117 15.2 12.7 120
MIDDLE POWDER 7760 8.3 14.2 58 8.3 14.9 56
OWL CREEK 8975 1.5 4.6 33 6.9 7.6 91
POWDER RIVER PASS 9480 8.9 11.3 79 13.5 14.9 91
SHELL CREEK 9580 15.4 16.5 93 15.5 15.9 97
SYLVAN LAKE 8420 -M 24.0 * -M 23.7 *
SYLVAN ROAD 7120 10.8 10.1 107 18.7 19.8 94
TIMBER CREEK 7950 5.0 5.2 96 8.8 9.7 91
YOUNTS PEAK 8350 17.0 18.1 94 17.4 18.1 96
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Basin wide percent of average 89 96
SHOSHONE RIVER
BLACKWATER 9780 27.2 27.9 97 23.8 23.6 101
EVENING STAR 9200 30.9 32.6 95 33.8 28.7 118
KIRWIN 9550 12.7 12.7 100 13.9 13.4 104
MARQUETTE 8760 12.8 10.9 117 15.2 12.7 120
SYLVAN LAKE 8420 -M 24.0 * -M 23.7 *
SYLVAN ROAD 7120 10.8 10.1 107 18.7 19.8 94
YOUNTS PEAK 8350 17.0 18.1 94 17.4 18.1 96
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Basin wide percent of average 99 106
POWDER-TONGUE
BEAR TRAP MEADOW 8200 2.2 3.6 61 9.1 10.2 89
BIG GOOSE 7990 11.1 12.0 92 15.0 11.7 128
BONE SPRINGS DIV 9350 18.7 18.0 104 18.0 17.3 104
BURGESS JUNCTION 7880 12.9 13.2 98 15.1 14.5 104
CLOUD PEAK RESERVOIR 9860 15.5 15.8 98 15.9 16.0 99
DOME LAKE 8880 12.2 13.8 88 16.8 15.8 106
GRAVE SPRINGS 8550 5.7 10.9 52 8.7 12.2 71
HANSEN SAWMILL 8360 4.5 5.6 80 10.8 10.3 105
MIDDLE POWDER 7760 8.3 14.2 58 8.3 14.9 56
POWDER RIVER PASS 9480 8.9 11.3 79 13.5 14.9 91
SUCKER CREEK 8880 14.0 13.3 105 17.8 16.4 109
TIE CREEK 6870 4.4 4.6 96 14.7 12.5 118
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Basin wide percent of average 87 98
BELLE FOURCHE
BLIND PARK 6890 -M 5.8 * 10.6 13.4 79
COLE CANYON 5910 .1 -M * 7.7 -M *
NORTH RAPID CREEK 6130 .1 6.3 2 9.1 10.7 85
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Basin wide percent of average 2* 82
UPPER N. PLATTE RIVER
COLUMBINE 9400 19.6 22.8 86 26.8 28.2 95
DIVIDE PEAK 8800 19.4 20.1 97 22.6 23.4 97
ELK RIVER 8700 14.2 17.3 82 20.9 22.1 95
JOE WRIGHT 10120 27.5 24.4 113 32.2 28.7 112
NORTH FRENCH CREEK 10100 33.3 33.5 99 32.4 28.4 114
OLD BATTLE 10000 32.3 35.8 90 36.0 38.5 94
SAGE CREEK BASIN 7850 1.6 11.6 14 13.3 13.6 98
SOUTH BRUSH CREEK 8400 9.9 12.2 81 19.0 19.1 99
TOWER 10500 47.6 50.9 94 46.5 43.4 107
WEBBER SPRINGS 9200 19.7 25.6 77 27.1 30.0 90
WILLOW CREEK PASS 9540 17.5 13.9 126 15.9 15.0 106
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Basin wide percent of average 90 101
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 18.1 27.4 66 22.9 25.7 89
CASPER MTN. 7900 13.2 17.0 78 13.5 18.1 75
DEADMAN HILL 10220 16.9 19.0 89 20.5 19.9 103
DEER PARK 9700 14.6 17.9 82 19.4 25.7 75
LAPRELE CREEK 8320 5.3 8.6 62 12.1 15.5 78
RENO HILL 8400 13.0 15.3 85 16.1 18.8 86
ROACH 9700 17.3 18.4 94 21.3 21.4 100
SAND LAKE 10080 28.0 36.0 78 -M 27.9 *
SOUTH PASS 9040 12.2 17.9 68 15.6 21.6 72
WINDY PEAK 7840 7.3 6.5 112 12.4 12.7 98
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Basin wide percent of average 79 86
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .6 6.6 9 16.6 17.9 93
DIVIDE PEAK 8800 19.4 20.1 97 22.6 23.4 97
OLD BATTLE 10000 32.3 35.8 90 36.0 38.5 94
SANDSTONE RS 8150 6.6 11.4 58 19.4 21.1 92
WHISKEY PARK 8950 28.0 30.6 92 29.5 32.5 91
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Basin wide percent of average 83 93
UPPER GREEN RIVER
BIG SANDY OPENING 9100 11.0 14.4 76 12.5 15.3 82
BLIND BULL SUM 8650 23.4 28.4 82 18.1 24.5 74
EAST RIM DIVIDE 7930 9.5 13.6 70 11.0 13.4 82
ELKHART PARK G.S. 9400 12.0 13.4 90 13.2 15.3 86
GROS VENTRE SUMMIT 8775 12.5 13.9 90 12.6 14.7 86
KENDALL R.S. 7740 7.2 11.8 61 13.7 16.1 85
LOOMIS PARK 8240 12.4 15.7 79 17.1 19.3 89
NEW FORK LAKE 8340 7.4 9.9 75 -M 12.9 *
SNIDER BASIN 8250 9.8 13.8 71 13.8 17.9 77
SPRING CREEK DIVIDE 9000 -M 28.6 * -M 29.3 *
TRIPLE PEAK 8500 19.3 24.8 78 27.8 27.7 100
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Basin wide percent of average 78 85
LOWER GREEN RIVER
HAMS FORK 7840 4.2 8.0 52 11.6 14.1 82
HEWINTA 9500 7.0 10.8 65 13.5 17.0 79
HICKERSON PARK 9150 2.9 7.0 41 9.4 9.6 98
HOLE-IN-ROCK 9150 5.8 6.0 97 10.1 9.1 111
INDIAN CREEK 9425 22.9 29.0 79 20.9 28.5 73
KELLEY R.S. 8180 10.6 15.6 68 14.4 22.8 63
STEEL CREEK PARK 10100 15.2 18.0 84 15.4 19.2 80
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Basin wide percent of average 73 79
UPPER BEAR RIVER
BUG LAKE 7950 13.2 19.9 66 17.2 21.6 80
HAYDEN FORK 9400 8.1 14.8 55 19.8 24.1 82
KELLEY R.S. 8180 10.6 15.6 68 14.4 22.8 63
LILY LAKE 9050 7.2 12.8 56 16.1 20.2 80
MONTE CRISTO 8960 12.8 29.5 43 22.8 29.1 78
SALT RIVER SUMMIT 7600 7.6 12.5 61 14.9 20.9 71
TRIAL LAKE 9960 14.3 26.4 54 18.9 28.3 67
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Basin wide percent of average 56 74
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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.