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 THURSDAY: APRIL 9 , 2009
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 15.9 17.8 89 19.9 22.3 89
COTTONWOOD CREEK 7670 27.6 24.4 113 31.9 28.8 111
GRAND TARGHEE 9260 45.3 -M * 34.9 -M *
GRANITE CREEK 6770 16.8 18.1 93 21.3 20.6 103
GRASSY LAKE 7265 33.3 37.0 90 35.8 37.5 95
GROS VENTRE SUMMIT 8750 -M 14.6 * 16.1 13.5 119
GUNSIGHT PASS 9820 15.6 -M * 16.7 -M *
LEWIS LAKE DIVIDE 7850 32.2 36.5 88 34.5 38.3 90
PHILLIPS BENCH 8200 28.8 30.1 96 30.1 30.3 99
SALT RIVER SUMMIT 7760 15.6 14.9 105 17.0 19.7 86
SNAKE RIVER STATION 6920 17.8 18.7 95 23.0 23.3 99
SPRING CREEK DIVIDE 9000 28.6 27.8 103 27.4 27.6 99
THUMB DIVIDE 7980 21.3 19.3 110 21.9 19.8 111
TOGWOTEE PASS 9580 28.3 26.0 109 30.5 25.8 118
TWO OCEAN PLATEAU 9240 39.4 29.6 133 30.3 29.0 104
WILLOW CREEK 8380 36.1 31.4 115 40.4 33.7 120
----- -----
Basin wide percent of average 103 103
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9360 24.5 24.5 100 22.3 21.0 106
BLACK BEAR 8170 37.2 40.5 92 37.0 42.1 88
CANYON 7870 14.3 14.0 102 15.5 16.1 96
FISHER CREEK 9100 38.0 36.3 105 37.1 38.0 98
MADISON PLATEAU 7750 23.7 26.0 91 25.3 28.0 90
NORTHEAST ENTRANCE 7350 11.7 11.1 105 14.6 13.2 111
PARKER PEAK 9400 28.2 22.7 124 20.9 17.1 122
SYLVAN LAKE 8420 22.2 23.5 94 24.4 21.9 111
THUMB DIVIDE 7980 21.3 19.3 110 21.9 19.8 111
TWO OCEAN PLATEAU 9240 39.4 29.6 133 30.3 29.0 104
WHISKEY CREEK 6800 17.6 17.7 99 20.9 22.0 95
WHITE MILL 8700 -M 25.3 * -M 28.2 *
WOLVERINE 7650 12.5 11.6 108 13.0 13.4 97
----- -----
Basin wide percent of average 105 101
WIND RIVER
BURROUGHS CREEK 8750 16.2 15.0 108 16.9 17.0 99
COLD SPRINGS 9630 8.5 8.4 101 11.2 11.3 99
DEER PARK 9700 13.5 17.4 78 18.4 23.1 80
HOBBS PARK 10100 15.5 15.9 97 15.5 13.7 113
LITTLE WARM 9370 12.4 12.3 101 15.3 14.1 109
SOUTH PASS 9040 14.5 17.3 84 16.2 19.4 84
ST. LAWRENCE ALT 8620 7.4 7.5 99 10.7 9.5 113
TOGWOTEE PASS 9580 28.3 26.0 109 30.5 25.8 118
TOWNSEND CREEK 8700 10.8 9.5 114 13.6 12.5 109
----- -----
Basin wide percent of average 98 101
BIGHORN BASIN
BALD MTN. 9380 20.1 20.8 97 16.3 18.3 89
BEAR TRAP MEADOW 8200 9.5 5.2 183 10.3 8.8 117
BLACKWATER 9780 27.0 25.7 105 24.4 21.6 113
BONE SPRINGS DIV 9350 18.4 17.1 108 15.4 15.5 99
EVENING STAR 9200 31.7 31.1 102 32.6 26.5 123
GRAVE SPRINGS 8550 10.4 10.2 102 11.1 10.5 106
KIRWIN 9550 13.7 11.9 115 15.0 11.9 126
MARQUETTE 8760 7.7 9.8 79 9.7 10.6 92
MIDDLE POWDER 7760 12.9 12.9 100 11.0 13.1 84
OWL CREEK 8975 6.2 5.7 109 6.2 6.3 98
POWDER RIVER PASS 9480 12.9 11.5 112 15.2 13.1 116
SHELL CREEK 9580 17.4 15.5 112 16.4 14.1 116
SYLVAN LAKE 8420 22.2 23.5 94 24.4 21.9 111
SYLVAN ROAD 7120 15.0 12.7 118 20.3 18.4 110
TIMBER CREEK 7950 5.0 5.8 86 8.5 7.9 108
YOUNTS PEAK 8350 18.5 17.7 105 16.4 16.9 97
----- -----
Basin wide percent of average 105 108
SHOSHONE RIVER
BLACKWATER 9780 27.0 25.7 105 24.4 21.6 113
EVENING STAR 9200 31.7 31.1 102 32.6 26.5 123
KIRWIN 9550 13.7 11.9 115 15.0 11.9 126
MARQUETTE 8760 7.7 9.8 79 9.7 10.6 92
SYLVAN LAKE 8420 22.2 23.5 94 24.4 21.9 111
SYLVAN ROAD 7120 15.0 12.7 118 20.3 18.4 110
YOUNTS PEAK 8350 18.5 17.7 105 16.4 16.9 97
----- -----
Basin wide percent of average 103 112
POWDER-TONGUE
BEAR TRAP MEADOW 8200 9.5 5.2 183 10.3 8.8 117
BIG GOOSE 7990 12.2 11.7 104 14.5 9.5 153
BONE SPRINGS DIV 9350 18.4 17.1 108 15.4 15.5 99
BURGESS JUNCTION 7880 14.0 12.4 113 14.4 12.9 112
CLOUD PEAK RESERVOIR 9860 19.2 14.4 133 18.3 13.7 134
DOME LAKE 8880 14.7 13.2 111 17.1 14.0 122
GRAVE SPRINGS 8550 10.4 10.2 102 11.1 10.5 106
HANSEN SAWMILL 8360 7.8 6.5 120 11.2 8.7 129
MIDDLE POWDER 7760 12.9 12.9 100 11.0 13.1 84
POWDER RIVER PASS 9480 12.9 11.5 112 15.2 13.1 116
SUCKER CREEK 8880 16.5 12.7 130 18.7 14.4 130
TIE CREEK 6870 8.2 6.1 134 15.9 10.6 150
----- -----
Basin wide percent of average 117 120
BELLE FOURCHE
BLIND PARK 6890 7.3 8.1 90 15.4 11.7 132
COLE CANYON 5910 7.8 7.1 110 13.5 7.1 190
NORTH RAPID CREEK 6130 10.9 8.8 124 15.0 9.0 167
----- -----
Basin wide percent of average 108 158
UPPER N. PLATTE RIVER
COLUMBINE 9160 28.2 25.1 112 28.7 26.3 109
DIVIDE PEAK 8880 25.3 20.6 123 27.3 21.6 126
ELK RIVER 8700 23.4 20.1 116 23.1 20.5 113
JOE WRIGHT 10120 24.4 22.6 108 29.6 26.0 114
NORTH FRENCH CREEK 10130 36.2 31.1 116 33.1 25.8 128
OLD BATTLE 10000 36.5 33.6 109 40.8 36.0 113
SAGE CREEK BASIN 7850 14.3 11.9 120 15.1 12.5 121
SOUTH BRUSH CREEK 8440 13.5 13.4 101 17.9 17.3 103
TOWER 10500 47.1 47.8 99 44.0 40.1 110
WEBBER SPRINGS 9250 27.4 26.4 104 31.0 27.9 111
WILLOW CREEK PASS 9540 13.8 12.9 107 13.6 13.5 101
----- -----
Basin wide percent of average 109 114
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 25.1 25.2 100 23.3 23.3 100
CASPER MTN. 7900 14.4 15.7 92 14.7 15.5 95
DEADMAN HILL 10220 17.6 17.4 101 17.8 17.8 100
DEER PARK 9700 13.5 17.4 78 18.4 23.1 80
LAPRELE CREEK 8375 9.5 10.9 87 13.8 13.4 103
RENO HILL 8400 16.4 15.2 108 17.6 16.1 109
ROACH 9700 17.1 18.0 95 19.5 19.5 100
SAND LAKE 10050 32.9 33.9 97 30.8 25.4 121
SOUTH PASS 9040 14.5 17.3 84 16.2 19.4 84
WINDY PEAK 7900 9.8 8.4 117 11.4 11.2 102
----- -----
Basin wide percent of average 95 99
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 18.2 10.0 182 19.2 16.6 116
DIVIDE PEAK 8880 25.3 20.6 123 27.3 21.6 126
OLD BATTLE 10000 36.5 33.6 109 40.8 36.0 113
SANDSTONE RS 8150 20.2 14.3 141 21.2 19.5 109
WHISKEY PARK 8950 34.6 30.7 113 35.6 29.9 119
----- -----
Basin wide percent of average 123 117
UPPER GREEN RIVER
BIG SANDY OPENING 9080 13.1 15.2 86 13.1 14.0 94
BLIND BULL SUM 8650 27.9 28.8 97 20.4 23.2 88
EAST RIM DIVIDE 7930 10.5 13.7 77 12.6 12.6 100
ELKHART PARK G.S. 9400 14.2 13.9 102 15.3 14.0 109
GROS VENTRE SUMMIT 8750 -M 14.6 * 16.1 13.5 119
GUNSIGHT PASS 9820 15.6 -M * 16.7 -M *
KENDALL R.S. 7740 11.8 14.3 83 14.2 15.1 94
LOOMIS PARK 8240 17.1 17.5 98 19.2 18.1 106
NEW FORK LAKE 8340 12.2 11.5 106 11.2 11.9 94
SNIDER BASIN 8060 15.0 15.0 100 15.5 16.9 92
SPRING CREEK DIVIDE 9000 28.6 27.8 103 27.4 27.6 99
TRIPLE PEAK 8500 24.9 25.7 97 27.2 25.9 105
----- -----
Basin wide percent of average 96 100
LOWER GREEN RIVER
HAMS FORK 7840 11.8 11.1 106 12.6 12.8 98
HEWINTA 9519 12.3 12.5 98 14.7 15.4 95
HICKERSON PARK 9145 6.1 8.3 73 9.5 8.4 113
HOLE-IN-ROCK 9150 6.6 7.5 88 9.5 8.0 119
INDIAN CREEK 9425 25.8 29.1 89 23.2 26.7 87
KELLEY R.S. 8180 17.2 17.4 99 19.0 21.3 89
STEEL CREEK PARK 10200 14.5 16.6 87 17.6 17.3 102
----- -----
Basin wide percent of average 92 97
UPPER BEAR RIVER
BUG LAKE 7950 20.4 21.7 94 19.0 20.1 95
HAYDEN FORK 9212 17.6 16.9 104 22.9 22.1 104
KELLEY R.S. 8180 17.2 17.4 99 19.0 21.3 89
LILY LAKE 9156 16.1 14.5 111 17.9 18.5 97
MONTE CRISTO 8960 28.7 30.5 94 27.9 26.8 104
SALT RIVER SUMMIT 7760 15.6 14.9 105 17.0 19.7 86
TRIAL LAKE 9992 25.1 26.0 97 23.7 26.2 90
----- -----
Basin wide percent of average 99 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.