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 21 , 1999
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 9.6 3.3 300 30.9 27.0 115
COTTONWOOD CREEK 7600 21.0 9.1 231 36.7 30.2 122
GRANITE CREEK 6770 11.0 5.5 202 27.9 28.9 97
GRASSY LAKE 7265 39.8 21.9 182 49.8 44.8 111
GROS VENTRE SUMMIT 8775 15.4 6.6 232 20.4 19.4 106
LEWIS LAKE DIVIDE 7860 38.7 26.2 148 46.2 45.7 102
PHILLIPS BENCH 8200 31.7 22.7 141 37.3 35.9 104
SALT RIVER SUMMIT 7600 7.5 .0 * 22.9 20.7 111
SNAKE RIVER STATION 6920 8.1 7.5 109 30.4 31.5 97
SPRING CREEK DIVIDE 9000 37.4 23.7 159 36.3 32.8 111
THUMB DIVIDE 7980 17.2 7.3 235 28.0 25.4 111
TOGWOTEE PASS 9580 -M 25.2 * 35.8 34.2 105
TWO OCEAN PLATEAU 9360 40.8 25.0 163 37.2 37.2 100
WILLOW CREEK 8450 31.9 24.9 129 48.9 38.8 127
----- -----
Basin wide percent of average 165 109
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 27.9 23.0 121 28.2 23.7 119
BLACK BEAR 7950 58.2 33.8 173 55.4 49.3 113
CANYON 7940 11.5 4.8 238 22.9 18.0 127
FISHER CREEK 9100 40.3 35.4 114 43.9 45.3 97
MADISON PLATEAU 7750 -M 15.0 * 39.0 32.2 122
NORTHEAST ENTRANCE 7350 .0 1.9 0 17.9 15.6 115
PARKER PEAK 9400 26.4 21.4 124 -M 20.4 *
SYLVAN LAKE 8420 24.2 18.4 132 33.9 24.9 137
THUMB DIVIDE 7980 17.2 7.3 235 28.0 25.4 111
TWO OCEAN PLATEAU 9360 40.8 25.0 163 37.2 37.2 100
WHISKEY CREEK 6800 16.9 6.6 255 30.2 26.7 113
WHITE MILL 8700 29.7 23.0 130 30.2 35.3 86
WOLVERINE 7650 .0 2.0 0 15.4 17.2 90
----- -----
Basin wide percent of average 145 109
WIND RIVER
BURROUGHS CREEK 8750 18.0 5.3 347 23.5 21.5 110
COLD SPRINGS 9630 16.9 2.0 841 24.9 15.1 165
DEER PARK 9700 26.5 -M * 34.2 -M *
HOBBS PARK 10100 31.2 14.4 218 29.2 19.7 149
LITTLE WARM 9620 18.7 3.8 490 25.2 18.4 138
SOUTH PASS 9040 22.7 14.4 159 31.2 22.9 137
ST. LAWRENCE ALT 8620 9.9 1.7 613 21.7 14.0 156
TOGWOTEE PASS 9580 -M 25.2 * 35.8 34.2 105
TOWNSEND CREEK 8700 16.4 4.6 355 26.7 17.7 152
----- -----
Basin wide percent of average 292 134
BIGHORN BASIN
BALD MTN. 9375 26.2 22.4 117 26.2 23.9 110
BEAR TRAP MEADOW 7900 .9 1.0 81 18.2 12.9 142
BLACKWATER 9780 36.5 22.7 161 31.2 22.9 137
BONE SPRINGS DIV 9350 22.9 13.7 168 25.7 20.9 124
EVENING STAR 9200 35.7 28.7 125 41.2 28.5 145
GRAVE SPRINGS 8550 9.0 8.0 114 19.0 15.0 128
KIRWIN 9550 17.7 8.5 211 21.7 15.2 143
MARQUETTE 8760 18.9 6.5 294 22.0 16.0 138
MIDDLE POWDER 7760 15.7 10.0 158 23.0 17.0 136
OWL CREEK 8975 9.5 .7 1343 15.5 9.9 159
POWDER RIVER PASS 9480 12.5 4.5 276 22.9 17.0 135
SHELL CREEK 9580 19.7 15.0 131 21.4 18.5 116
SYLVAN LAKE 8420 24.2 18.4 132 33.9 24.9 137
SYLVAN ROAD 8120 -M 3.0 * -M 20.7 *
TIMBER CREEK 7950 10.0 1.7 589 18.4 12.5 148
YOUNTS PEAK 8350 20.4 13.5 152 22.7 21.4 107
----- -----
Basin wide percent of average 160 132
SHOSHONE RIVER
BLACKWATER 9780 36.5 22.7 161 31.2 22.9 137
EVENING STAR 9200 35.7 28.7 125 41.2 28.5 145
KIRWIN 9550 17.7 8.5 211 21.7 15.2 143
MARQUETTE 8760 18.9 6.5 294 22.0 16.0 138
SYLVAN LAKE 8420 24.2 18.4 132 33.9 24.9 137
SYLVAN ROAD 8120 -M 3.0 * -M 20.7 *
YOUNTS PEAK 8350 20.4 13.5 152 22.7 21.4 107
----- -----
Basin wide percent of average 157 135
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .9 1.0 81 18.2 12.9 142
BIG GOOSE 7990 9.0 -M * 19.7 -M *
BONE SPRINGS DIV 9350 22.9 13.7 168 25.7 20.9 124
BURGESS JUNCTION 7880 11.4 8.0 142 18.7 16.7 113
CLOUD PEAK RESERVOIR 9860 23.5 13.5 176 25.9 19.9 131
DOME LAKE 8880 -M 8.1 * 18.5 18.9 98
GRAVE SPRINGS 8550 9.0 8.0 114 19.0 15.0 128
HANSEN SAWMILL 8760 1.4 2.9 49 18.0 12.1 149
MIDDLE POWDER 7760 15.7 10.0 158 23.0 17.0 136
POWDER RIVER PASS 9480 12.5 4.5 276 22.9 17.0 135
SUCKER CREEK 8880 15.1 8.4 182 23.4 19.2 122
TIE CREEK 6870 2.8 -M * 19.4 16.0 122
----- -----
Basin wide percent of average 161 126
BELLE FOURCHE
BLIND PARK 6890 .2 3.0 4 20.4 16.7 123
NORTH RAPID CREEK 6130 .0 -M * 17.9 -M *
WARREN PEAK 6520 .0 3.2 0 -M 12.4 *
----- -----
Basin wide percent of average 2 123*
UPPER N. PLATTE RIVER
COLUMBINE 9400 7.6 10.1 76 30.2 30.0 101
DIVIDE PEAK 8800 16.0 9.2 173 32.8 29.7 111
ELK RIVER 8700 5.8 5.6 102 30.2 23.7 128
JOE WRIGHT 10120 22.9 21.4 107 34.4 33.3 104
NORTH FRENCH CREEK 10100 41.8 24.5 171 40.2 30.9 131
OLD BATTLE 10000 40.0 32.4 124 48.7 38.3 127
SOUTH BRUSH CREEK 8400 9.0 4.3 215 27.4 22.4 122
TOWER 10500 -M 48.7 * -M 47.3 *
WEBBER SPRINGS 9200 17.4 17.0 102 35.3 32.8 108
WILLOW CREEK PASS 9540 12.9 7.8 165 16.9 17.4 98
----- -----
Basin wide percent of average 131 115
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 26.0 20.7 126 33.0 26.0 127
CASPER MTN. 7900 7.3 8.5 85 23.9 21.5 112
DEADMAN HILL 10220 20.2 15.7 129 24.9 23.4 107
DEER PARK 9700 26.5 -M * 34.2 -M *
LAPRELE CREEK 8320 .0 2.7 0 21.7 16.9 129
RENO HILL 8400 9.5 6.6 144 27.2 23.7 115
ROACH 9700 -M 13.0 * 26.9 28.7 94
SAND LAKE 10080 46.3 31.7 147 39.5 27.2 146
SOUTH PASS 9040 22.7 14.4 159 31.2 22.9 137
WINDY PEAK 7840 .0 2.3 0 19.2 14.5 132
----- -----
Basin wide percent of average 129 121
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 * 24.2 20.2 120
DIVIDE PEAK 8800 16.0 9.2 173 32.8 29.7 111
OLD BATTLE 10000 40.0 32.4 124 48.7 38.3 127
SANDSTONE RS 8150 .0 1.5 0* 27.2 25.0 109
WHISKEY PARK 8950 28.9 20.7 140 39.5 36.8 108
----- -----
Basin wide percent of average 133 115
UPPER GREEN RIVER
BIG SANDY OPENING 9100 12.2 6.5 191 19.7 19.9 99
BLIND BULL SUM 8650 32.9 20.4 163 28.7 28.7 100
EAST RIM DIVIDE 7930 13.0 10.7 121 18.4 18.7 99
ELKHART PARK G.S. 9400 14.5 8.0 184 19.9 19.5 102
GROS VENTRE SUMMIT 8775 15.4 6.6 232 20.4 19.4 106
KENDALL R.S. 7740 6.3 .0 * 20.5 19.0 108
LOOMIS PARK 8240 -M 7.5 * 25.4 23.0 111
NEW FORK LAKE 8340 7.8 4.1 188 16.9 17.7 95
SNIDER BASIN 8250 13.2 5.5 240 23.2 18.5 126
SPRING CREEK DIVIDE 9000 37.4 23.7 159 36.3 32.8 111
TRIPLE PEAK 8500 28.0 19.0 148 39.3 37.5 105
----- -----
Basin wide percent of average 168 106
LOWER GREEN RIVER
HAMS FORK 7840 .0 .0 * 18.4 16.4 113
HEWINTA 9500 10.2 .0 * 20.5 18.2 114
HICKERSON PARK 9150 1.2 .5 300* 15.5 14.2 110
HOLE-IN-ROCK 9150 4.3 .5 1050* 16.0 14.2 112
INDIAN CREEK 9425 36.7 22.4 165 34.9 31.2 112
KELLEY R.S. 8180 12.1 6.5 187 24.7 23.0 108
STEEL CREEK PARK 10100 23.4 15.0 156 24.7 18.5 133
----- -----
Basin wide percent of average 174* 115
UPPER BEAR RIVER
BUG LAKE 7950 19.4 7.5 261 29.7 24.2 124
HAYDEN FORK 9400 10.5 .5 2100* 29.7 25.2 118
KELLEY R.S. 8180 12.1 6.5 187 24.7 23.0 108
LILY LAKE 9050 9.6 4.1 235 25.5 20.2 127
MONTE CRISTO 8960 39.4 17.7 223 38.5 32.5 119
SALT RIVER SUMMIT 7600 7.5 .0 * 22.9 20.7 111
TRIAL LAKE 9960 26.7 17.9 150 31.7 30.5 104
----- -----
Basin wide percent of average 218 116
-----------------------------------------------------------------------------
-M = Missing data
* = Data may not provide a valid measure of conditions.
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.