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: MAY 19 , 1999
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 11.5 3.8 311 30.9 26.9 116
COTTONWOOD CREEK 7600 23.2 10.9 215 36.7 29.9 123
GRANITE CREEK 6770 12.5 6.0 207 27.9 28.7 98
GRASSY LAKE 7265 39.9 23.7 169 49.8 44.5 112
GROS VENTRE SUMMIT 8775 -M 7.8 * -M 19.4 *
LEWIS LAKE DIVIDE 7860 39.3 27.4 144 46.0 45.3 102
PHILLIPS BENCH 8200 33.4 23.5 143 37.3 35.8 105
SALT RIVER SUMMIT 7600 10.0 .0 * 22.9 20.5 112
SNAKE RIVER STATION 6920 -M 8.9 * -M 31.4 *
SPRING CREEK DIVIDE 9000 38.5 24.4 158 36.3 32.7 112
THUMB DIVIDE 7980 -M 8.6 * -M 25.2 *
TOGWOTEE PASS 9580 -M 25.5 * 35.8 33.9 106
TWO OCEAN PLATEAU 9360 42.2 25.5 166 37.2 36.9 101
WILLOW CREEK 8450 33.7 25.9 131 48.9 38.5 128
----- -----
Basin wide percent of average 161 110
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 29.2 23.7 123 28.2 23.5 120
BLACK BEAR 7950 57.8 34.8 166 55.4 48.9 114
CANYON 7940 13.0 5.5 239 22.9 17.9 128
FISHER CREEK 9100 42.9 36.2 119 43.9 45.0 98
MADISON PLATEAU 7750 -M 16.4 * 39.2 31.9 123
NORTHEAST ENTRANCE 7350 1.4 2.2 67 17.9 15.5 115
PARKER PEAK 9400 27.9 21.9 128 -M 20.2 *
SYLVAN LAKE 8420 25.0 19.2 131 33.9 24.7 138
THUMB DIVIDE 7980 -M 8.6 * -M 25.2 *
TWO OCEAN PLATEAU 9360 42.2 25.5 166 37.2 36.9 101
WHISKEY CREEK 6800 -M 7.6 * 30.0 26.5 114
WHITE MILL 8700 31.4 23.7 133 30.2 35.0 87
WOLVERINE 7650 .0 2.3 0 15.5 16.9 92
----- -----
Basin wide percent of average 139 110
WIND RIVER
BURROUGHS CREEK 8750 -M 5.8 * -M 21.4 *
COLD SPRINGS 9630 17.9 2.3 774 24.9 15.0 167
DEER PARK 9700 26.9 -M * 34.2 -M *
HOBBS PARK 10100 31.4 15.2 206 29.2 19.4 151
LITTLE WARM 9620 19.7 4.3 459 25.2 18.2 139
SOUTH PASS 9040 23.9 15.0 159 31.2 22.7 138
ST. LAWRENCE ALT 8620 -M 1.9 * -M 14.0 *
TOGWOTEE PASS 9580 -M 25.5 * 35.8 33.9 106
TOWNSEND CREEK 8700 17.5 5.1 344 26.7 17.4 153
----- -----
Basin wide percent of average 263 137
BIGHORN BASIN
BALD MTN. 9375 26.4 23.2 115 26.2 23.5 112
BEAR TRAP MEADOW 7900 1.2 1.2 100 18.2 12.6 144
BLACKWATER 9780 37.4 23.4 160 31.2 22.7 139
BONE SPRINGS DIV 9350 23.4 14.7 160 25.7 20.5 125
EVENING STAR 9200 37.5 29.2 129 41.2 28.4 146
GRAVE SPRINGS 8550 10.6 9.0 120 18.9 14.7 129
KIRWIN 9550 18.0 9.0 200 21.5 15.0 144
MARQUETTE 8760 19.2 6.8 283 22.0 15.9 140
MIDDLE POWDER 7760 17.2 11.4 152 23.0 16.9 137
OWL CREEK 8975 10.6 .9 1325 15.5 9.7 160
POWDER RIVER PASS 9480 13.0 5.1 255 22.9 16.9 137
SHELL CREEK 9580 19.9 15.7 127 21.4 18.2 118
SYLVAN LAKE 8420 25.0 19.2 131 33.9 24.7 138
SYLVAN ROAD 8120 -M 3.3 * -M 20.5 *
TIMBER CREEK 7950 10.6 2.0 530 18.4 12.4 150
YOUNTS PEAK 8350 21.0 14.4 147 22.7 21.2 108
----- -----
Basin wide percent of average 158 133
SHOSHONE RIVER
BLACKWATER 9780 37.4 23.4 160 31.2 22.7 139
EVENING STAR 9200 37.5 29.2 129 41.2 28.4 146
KIRWIN 9550 18.0 9.0 200 21.5 15.0 144
MARQUETTE 8760 19.2 6.8 283 22.0 15.9 140
SYLVAN LAKE 8420 25.0 19.2 131 33.9 24.7 138
SYLVAN ROAD 8120 -M 3.3 * -M 20.5 *
YOUNTS PEAK 8350 21.0 14.4 147 22.7 21.2 108
----- -----
Basin wide percent of average 156 136
POWDER-TONGUE
BEAR TRAP MEADOW 7900 1.2 1.2 100 18.2 12.6 144
BIG GOOSE 7990 9.6 -M * 19.7 -M *
BONE SPRINGS DIV 9350 23.4 14.7 160 25.7 20.5 125
BURGESS JUNCTION 7880 12.1 9.1 133 18.7 16.4 115
CLOUD PEAK RESERVOIR 9860 24.9 14.4 175 25.9 19.7 132
DOME LAKE 8880 -M 8.9 * 18.7 18.7 100
GRAVE SPRINGS 8550 10.6 9.0 120 18.9 14.7 129
HANSEN SAWMILL 8760 3.3 3.3 97 18.0 12.0 152
MIDDLE POWDER 7760 17.2 11.4 152 23.0 16.9 137
POWDER RIVER PASS 9480 13.0 5.1 255 22.9 16.9 137
SUCKER CREEK 8880 15.9 9.0 176 23.2 18.9 123
TIE CREEK 6870 3.8 -M * 19.4 15.7 123
----- -----
Basin wide percent of average 158 128
BELLE FOURCHE
BLIND PARK 6890 .5 3.7 12 20.4 16.4 124
NORTH RAPID CREEK 6130 .0 -M * 17.9 -M *
WARREN PEAK 6520 .7 3.7 20 -M 12.1 *
----- -----
Basin wide percent of average 16 124*
UPPER N. PLATTE RIVER
COLUMBINE 9400 10.5 11.5 92 30.2 29.9 102
DIVIDE PEAK 8800 19.4 10.4 188 33.0 29.4 113
ELK RIVER 8700 9.0 6.6 137 30.2 23.5 129
JOE WRIGHT 10120 24.2 22.2 110 34.4 33.0 105
NORTH FRENCH CREEK 10100 42.3 25.2 168 40.3 30.5 133
OLD BATTLE 10000 40.9 33.9 121 48.7 38.0 128
SOUTH BRUSH CREEK 8400 9.9 4.8 205 27.4 22.2 123
TOWER 10500 -M 49.3 * -M 46.9 *
WEBBER SPRINGS 9200 19.4 18.2 107 35.3 32.5 109
WILLOW CREEK PASS 9540 13.9 8.9 157 16.9 17.2 99
----- -----
Basin wide percent of average 134 116
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 27.7 22.2 125 33.0 25.9 128
CASPER MTN. 7900 9.7 9.5 104 23.9 21.2 113
DEADMAN HILL 10220 21.0 16.7 126 24.9 23.2 108
DEER PARK 9700 26.9 -M * 34.2 -M *
LAPRELE CREEK 8320 .0 2.9 0 21.5 16.7 129
RENO HILL 8400 11.0 7.3 151 27.2 23.7 115
ROACH 9700 -M 14.0 * 26.9 28.4 95
SAND LAKE 10080 46.3 32.9 141 39.4 26.9 147
SOUTH PASS 9040 23.9 15.0 159 31.2 22.7 138
WINDY PEAK 7840 .0 2.8 0 19.2 14.4 135
----- -----
Basin wide percent of average 128 122
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 .0 * 24.2 19.9 122
DIVIDE PEAK 8800 19.4 10.4 188 33.0 29.4 113
OLD BATTLE 10000 40.9 33.9 121 48.7 38.0 128
SANDSTONE RS 8150 .3 1.9 12 27.0 24.9 109
WHISKEY PARK 8950 31.2 22.2 141 39.7 36.5 109
----- -----
Basin wide percent of average 135 116
UPPER GREEN RIVER
BIG SANDY OPENING 9100 14.0 7.5 186 19.7 19.9 100
BLIND BULL SUM 8650 33.7 21.0 161 28.5 28.5 100
EAST RIM DIVIDE 7930 14.0 11.5 123 18.4 18.5 100
ELKHART PARK G.S. 9400 15.7 8.6 183 19.9 19.4 103
GROS VENTRE SUMMIT 8775 -M 7.8 * -M 19.4 *
KENDALL R.S. 7740 8.0 .0 * 20.5 18.9 109
LOOMIS PARK 8240 -M 8.7 * 25.4 22.9 111
NEW FORK LAKE 8340 9.1 4.8 190 16.7 17.7 95
SNIDER BASIN 8250 15.0 6.5 230 23.2 18.4 126
SPRING CREEK DIVIDE 9000 38.5 24.4 158 36.3 32.7 112
TRIPLE PEAK 8500 30.2 19.7 154 39.3 37.3 106
----- -----
Basin wide percent of average 164 106
LOWER GREEN RIVER
HAMS FORK 7840 2.0 .0 * 18.4 16.2 113
HEWINTA 9500 11.5 .0 * 20.5 17.9 115
HICKERSON PARK 9150 2.5 .5 500* 15.4 14.0 110
HOLE-IN-ROCK 9150 6.0 .5 1181* 16.0 14.0 114
INDIAN CREEK 9425 38.7 23.2 167 34.8 31.0 113
KELLEY R.S. 8180 13.9 7.8 180 24.7 22.9 109
STEEL CREEK PARK 10100 23.5 15.6 151 24.7 18.4 135
----- -----
Basin wide percent of average 178* 115
UPPER BEAR RIVER
BUG LAKE 7950 21.4 8.4 257 29.7 24.0 124
HAYDEN FORK 9400 12.6 .6 2101* 29.5 24.9 119
KELLEY R.S. 8180 13.9 7.8 180 24.7 22.9 109
LILY LAKE 9050 11.4 4.6 246 25.5 19.9 129
MONTE CRISTO 8960 41.3 19.2 216 38.5 32.3 120
SALT RIVER SUMMIT 7600 10.0 .0 * 22.9 20.5 112
TRIAL LAKE 9960 28.0 18.9 149 31.5 30.4 104
----- -----
Basin wide percent of average 217 116
-----------------------------------------------------------------------------
-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.