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 1 , 2009
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 15.7 18.1 87 19.2 21.6 89
COTTONWOOD CREEK 7670 26.9 24.1 112 30.1 27.6 109
GRAND TARGHEE 9260 42.8 -M * 33.2 -M *
GRANITE CREEK 6770 16.6 18.7 89 20.7 20.1 103
GRASSY LAKE 7265 31.8 36.0 88 34.1 36.2 94
GROS VENTRE SUMMIT 8750 -M 14.3 * 15.7 13.0 121
GUNSIGHT PASS 9820 15.0 -M * 15.9 -M *
LEWIS LAKE DIVIDE 7850 -M 35.7 * -M 37.0 *
PHILLIPS BENCH 8200 27.7 29.1 95 29.0 29.2 99
SALT RIVER SUMMIT 7760 14.9 14.6 102 16.1 18.9 85
SNAKE RIVER STATION 6920 16.9 19.2 88 21.9 22.4 98
SPRING CREEK DIVIDE 9000 27.2 26.8 101 26.3 26.6 99
THUMB DIVIDE 7980 19.3 19.2 101 20.2 19.0 106
TOGWOTEE PASS 9580 27.4 25.0 110 29.5 24.7 119
TWO OCEAN PLATEAU 9240 38.1 28.2 135 29.5 27.9 106
WILLOW CREEK 8380 34.2 30.5 112 38.7 32.4 119
----- -----
Basin wide percent of average 102 104
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 23.3 23.5 99 21.2 20.2 105
BLACK BEAR 8170 36.3 39.6 92 35.1 40.7 86
CANYON 7870 13.6 13.9 98 14.7 15.5 95
FISHER CREEK 9100 36.8 35.3 104 35.7 36.6 98
MADISON PLATEAU 7750 22.4 25.4 88 24.0 26.9 89
NORTHEAST ENTRANCE 7350 11.2 11.3 99 13.7 12.7 108
PARKER PEAK 9400 26.2 21.8 120 19.6 16.3 120
SYLVAN LAKE 8420 20.5 22.7 90 22.6 21.0 108
THUMB DIVIDE 7980 19.3 19.2 101 20.2 19.0 106
TWO OCEAN PLATEAU 9240 38.1 28.2 135 29.5 27.9 106
WHISKEY CREEK 6800 16.5 17.4 95 19.9 21.1 94
WHITE MILL 8700 24.7 24.5 101 -M 27.2 *
WOLVERINE 7650 11.9 11.6 103 12.1 12.8 95
----- -----
Basin wide percent of average 102 99
WIND RIVER
BURROUGHS CREEK 8750 15.7 14.8 106 16.1 16.3 99
COLD SPRINGS 9630 7.7 9.0 86 10.2 10.6 96
DEER PARK 9700 10.9 17.0 64 15.6 21.9 71
HOBBS PARK 10100 12.7 15.0 85 12.7 12.8 99
LITTLE WARM 9370 12.1 12.0 101 14.8 13.4 110
SOUTH PASS 9040 12.0 16.7 72 14.3 18.5 77
ST. LAWRENCE ALT 8620 5.7 7.4 77 9.0 8.8 102
TOGWOTEE PASS 9580 27.4 25.0 110 29.5 24.7 119
TOWNSEND CREEK 8700 8.4 8.7 97 11.0 11.6 95
----- -----
Basin wide percent of average 90 96
BIGHORN BASIN
BALD MTN. 9380 18.9 19.7 96 15.2 17.4 87
BEAR TRAP MEADOW 8200 9.3 5.2 179 9.8 8.2 120
BLACKWATER 9780 25.0 24.8 101 22.6 20.6 110
BONE SPRINGS DIV 9350 17.5 16.3 107 14.4 14.6 99
EVENING STAR 9200 30.1 30.0 100 30.9 25.4 122
GRAVE SPRINGS 8550 9.6 9.4 102 10.2 9.6 106
KIRWIN 9550 12.8 11.4 112 14.1 11.2 126
MARQUETTE 8760 6.6 9.0 73 8.5 9.7 88
MIDDLE POWDER 7760 11.6 11.8 98 10.1 12.3 82
OWL CREEK 8975 5.6 5.6 100 5.5 5.8 95
POWDER RIVER PASS 9480 12.6 10.9 116 14.6 12.3 119
SHELL CREEK 9580 16.9 14.8 114 16.0 13.3 120
SYLVAN LAKE 8420 20.5 22.7 90 22.6 21.0 108
SYLVAN ROAD 7120 14.1 12.9 109 18.9 17.7 107
TIMBER CREEK 7950 4.8 5.8 83 8.3 7.3 114
YOUNTS PEAK 8350 18.2 17.2 106 16.1 16.2 99
----- -----
Basin wide percent of average 103 107
SHOSHONE RIVER
BLACKWATER 9780 25.0 24.8 101 22.6 20.6 110
EVENING STAR 9200 30.1 30.0 100 30.9 25.4 122
KIRWIN 9550 12.8 11.4 112 14.1 11.2 126
MARQUETTE 8760 6.6 9.0 73 8.5 9.7 88
SYLVAN LAKE 8420 20.5 22.7 90 22.6 21.0 108
SYLVAN ROAD 7120 14.1 12.9 109 18.9 17.7 107
YOUNTS PEAK 8350 18.2 17.2 106 16.1 16.2 99
----- -----
Basin wide percent of average 99 110
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.3 5.2 179 9.8 8.2 120
BIG GOOSE 7990 10.1 10.6 95 12.3 8.4 146
BONE SPRINGS DIV 9350 17.5 16.3 107 14.4 14.6 99
BURGESS JUNCTION 7880 12.5 11.7 107 12.8 12.1 106
CLOUD PEAK RESERVOIR 9860 17.3 13.4 129 15.9 12.8 124
DOME LAKE 8880 13.1 12.4 106 15.4 13.1 118
GRAVE SPRINGS 8550 9.6 9.4 102 10.2 9.6 106
HANSEN SAWMILL 8360 6.7 6.4 105 9.8 8.1 121
MIDDLE POWDER 7760 11.6 11.8 98 10.1 12.3 82
POWDER RIVER PASS 9480 12.6 10.9 116 14.6 12.3 119
SUCKER CREEK 8880 14.6 11.8 124 16.7 13.5 124
TIE CREEK 6870 5.9 5.9 100 13.4 9.8 137
----- -----
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 6.7 182
NORTH RAPID CREEK 6130 10.1 8.2 123 14.3 8.6 166
----- -----
Basin wide percent of average 103 157
UPPER N. PLATTE RIVER
COLUMBINE 9160 27.0 25.0 108 26.7 25.2 106
DIVIDE PEAK 8880 24.0 19.9 121 25.3 20.7 122
ELK RIVER 8700 22.2 19.5 114 21.7 19.6 111
JOE WRIGHT 10120 23.6 21.3 111 27.4 24.7 111
NORTH FRENCH CREEK 10130 35.0 29.3 119 31.8 24.6 129
OLD BATTLE 10000 33.6 32.3 104 37.9 34.6 110
SAGE CREEK BASIN 7850 11.9 11.5 103 14.2 12.0 118
SOUTH BRUSH CREEK 8440 13.2 13.1 101 17.2 16.3 106
TOWER 10500 44.9 45.6 98 42.2 38.4 110
WEBBER SPRINGS 9250 25.2 26.3 96 28.4 26.7 106
WILLOW CREEK PASS 9540 12.4 12.0 103 12.3 12.8 96
----- -----
Basin wide percent of average 107 112
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 23.4 23.7 99 21.2 22.0 96
CASPER MTN. 7900 12.2 14.4 85 13.3 14.3 93
DEADMAN HILL 10220 16.3 16.3 100 16.6 16.8 99
DEER PARK 9700 10.9 17.0 64 15.6 21.9 71
LAPRELE CREEK 8375 9.2 10.9 84 11.4 12.5 91
RENO HILL 8400 14.3 14.2 101 15.2 14.8 103
ROACH 9700 14.7 17.0 86 17.2 18.6 92
SAND LAKE 10050 30.5 32.5 94 28.3 24.0 118
SOUTH PASS 9040 12.0 16.7 72 14.3 18.5 77
WINDY PEAK 7900 8.7 8.1 107 9.6 10.5 91
----- -----
Basin wide percent of average 89 94
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 17.0 11.1 153 18.5 15.8 117
DIVIDE PEAK 8880 24.0 19.9 121 25.3 20.7 122
OLD BATTLE 10000 33.6 32.3 104 37.9 34.6 110
SANDSTONE RS 8150 18.8 14.9 126 20.5 18.7 110
WHISKEY PARK 8950 33.4 30.3 110 33.7 28.7 117
----- -----
Basin wide percent of average 117 115
UPPER GREEN RIVER
BIG SANDY OPENING 9080 12.3 14.6 84 12.1 13.4 90
BLIND BULL SUM 8650 26.6 28.2 94 19.7 22.4 88
EAST RIM DIVIDE 7930 10.0 13.2 76 12.0 12.1 99
ELKHART PARK G.S. 9400 12.8 13.5 95 13.8 13.4 103
GROS VENTRE SUMMIT 8750 -M 14.3 * 15.7 13.0 121
GUNSIGHT PASS 9820 15.0 -M * 15.9 -M *
KENDALL R.S. 7740 11.7 14.6 80 13.8 14.7 94
LOOMIS PARK 8240 16.3 17.5 93 18.4 17.5 105
NEW FORK LAKE 8340 11.7 11.3 104 10.4 11.4 91
SNIDER BASIN 8060 14.4 14.7 98 14.7 16.2 91
SPRING CREEK DIVIDE 9000 27.2 26.8 101 26.3 26.6 99
TRIPLE PEAK 8500 24.5 25.1 98 26.1 24.9 105
----- -----
Basin wide percent of average 93 99
LOWER GREEN RIVER
HAMS FORK 7840 11.0 12.1 91 11.4 12.3 93
HEWINTA 9519 9.3 12.0 78 13.1 14.6 90
HICKERSON PARK 9145 4.2 7.6 55 7.4 7.9 94
HOLE-IN-ROCK 9150 4.7 7.1 66 7.5 7.4 101
INDIAN CREEK 9425 24.6 28.1 88 21.8 25.6 85
KELLEY R.S. 8180 16.3 17.0 96 17.9 20.4 88
STEEL CREEK PARK 10200 12.3 15.8 78 15.6 16.2 96
----- -----
Basin wide percent of average 83 91
UPPER BEAR RIVER
BUG LAKE 7950 19.0 21.1 90 17.9 19.4 92
HAYDEN FORK 9212 15.8 16.5 96 20.8 21.0 99
KELLEY R.S. 8180 16.3 17.0 96 17.9 20.4 88
LILY LAKE 9156 13.9 13.3 105 16.0 17.5 91
MONTE CRISTO 8960 26.7 30.0 89 25.9 25.6 101
SALT RIVER SUMMIT 7760 14.9 14.6 102 16.1 18.9 85
TRIAL LAKE 9992 23.5 25.2 93 21.6 25.0 86
----- -----
Basin wide percent of average 94 92
-----------------------------------------------------------------------------
-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.