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 MONDAY: MAY 4 , 1998
-----------------------------------------------------------------------------
BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION
Data Site Name (Ft) % %
Current Average Avg Current Average Avg
-----------------------------------------------------------------------------
WYOMING
SNAKE RIVER
BASE CAMP 7030 8.7 9.4 93 22.9 25.5 90
COTTONWOOD CREEK 7600 13.6 18.7 73 25.6 28.5 90
GRANITE CREEK 6770 10.7 11.7 91 22.3 27.1 82
GRASSY LAKE 7265 26.2 32.5 81 38.4 42.3 91
GROS VENTRE SUMMIT 8775 10.9 13.1 83 14.9 18.3 81
LEWIS LAKE DIVIDE 7860 27.3 33.4 82 35.3 43.0 82
PHILLIPS BENCH 8200 25.5 28.6 89 29.0 33.9 86
SALT RIVER SUMMIT 7600 8.8 8.5 104 20.5 19.4 106
SNAKE RIVER STATION 6920 -M 15.3 * -M 29.7 *
SPRING CREEK DIVIDE 9000 20.4 28.8 71 24.2 31.1 78
THUMB DIVIDE 7980 -M 14.3 * -M 23.8 *
TOGWOTEE PASS 9580 24.6 27.8 88 26.7 32.2 83
TWO OCEAN PLATEAU 9360 30.0 27.3 110 30.3 35.1 86
WILLOW CREEK 8450 20.7 31.0 67 35.0 36.6 96
----- -----
Basin wide percent of average 84 87
UPPER YELLOWSTONE-MADISON
BEARTOOTH LAKE 9275 18.8 25.8 73 18.3 21.6 85
BLACK BEAR 7950 38.0 39.2 97 39.9 46.9 85
CANYON 7940 8.3 10.0 83 16.3 16.6 98
FISHER CREEK 9100 28.4 38.4 74 30.9 42.7 72
MADISON PLATEAU 7750 18.9 22.8 83 25.7 30.2 85
NORTHEAST ENTRANCE 7350 .5 5.2 10 12.7 14.2 89
PARKER PEAK 9400 17.2 23.5 73 18.0 18.5 97
SYLVAN LAKE 8420 15.6 23.1 68 22.6 22.7 100
THUMB DIVIDE 7980 -M 14.3 * -M 23.8 *
TWO OCEAN PLATEAU 9360 30.0 27.3 110 30.3 35.1 86
WHISKEY CREEK 6800 13.5 14.0 96 21.2 25.2 84
WHITE MILL 8700 22.5 26.0 87 23.1 33.0 70
WOLVERINE 7650 .3 7.0 4 -M 15.5 *
----- -----
Basin wide percent of average 81 84
WIND RIVER
BURROUGHS CREEK 8750 15.2 11.6 131 19.4 19.7 98
COLD SPRINGS 9630 7.9 5.9 134 14.8 13.4 110
DEER PARK 9700 -M -M * 24.7 -M *
HOBBS PARK 10100 18.5 17.8 104 18.2 17.6 103
LITTLE WARM 9620 9.1 9.3 98 15.9 16.6 96
SOUTH PASS 9040 15.1 17.8 85 21.2 20.9 101
ST. LAWRENCE ALT 8620 8.0 4.8 167 13.1 12.7 103
TOGWOTEE PASS 9580 24.6 27.8 88 26.7 32.2 83
TOWNSEND CREEK 8700 10.3 8.8 117 17.1 15.8 108
----- -----
Basin wide percent of average 105 98
BIGHORN BASIN
BALD MTN. 9375 21.5 24.2 89 20.4 21.2 96
BEAR TRAP MEADOW 7900 .3 3.6 8 11.8 10.9 108
BLACKWATER 9780 21.0 25.5 82 20.5 20.9 98
BONE SPRINGS DIV 9350 19.6 18.0 109 19.9 18.5 108
EVENING STAR 9200 20.8 30.7 68 27.1 26.3 103
GRAVE SPRINGS 8550 10.8 -M * 14.0 12.8 109
KIRWIN 9550 11.9 11.4 104 15.9 13.6 117
MARQUETTE 8760 13.1 8.4 156 16.6 13.9 119
MIDDLE POWDER 7760 10.9 14.6 75 13.3 15.1 88
OWL CREEK 8975 4.9 2.9 169 9.8 8.4 117
POWDER RIVER PASS 9480 10.2 9.6 106 16.1 15.0 107
SHELL CREEK 9580 13.8 17.0 81 13.8 16.3 85
SYLVAN LAKE 8420 15.6 23.1 68 22.6 22.7 100
SYLVAN ROAD 8120 2.9 7.1 41 15.2 18.9 80
TIMBER CREEK 7950 6.5 5.2 125 12.7 10.4 122
YOUNTS PEAK 8350 14.9 17.8 84 16.9 19.6 86
----- -----
Basin wide percent of average 86 101
SHOSHONE RIVER
BLACKWATER 9780 21.0 25.5 82 20.5 20.9 98
EVENING STAR 9200 20.8 30.7 68 27.1 26.3 103
KIRWIN 9550 11.9 11.4 104 15.9 13.6 117
MARQUETTE 8760 13.1 8.4 156 16.6 13.9 119
SYLVAN LAKE 8420 15.6 23.1 68 22.6 22.7 100
SYLVAN ROAD 8120 2.9 7.1 41 15.2 18.9 80
YOUNTS PEAK 8350 14.9 17.8 84 16.9 19.6 86
----- -----
Basin wide percent of average 81 99
POWDER-TONGUE
BEAR TRAP MEADOW 7900 .3 3.6 8 11.8 10.9 108
BONE SPRINGS DIV 9350 19.6 18.0 109 19.9 18.5 108
BURGESS JUNCTION 7880 11.2 13.0 86 15.2 14.7 103
CLOUD PEAK RESERVOIR 9860 15.7 17.4 90 19.9 17.5 114
DOME LAKE 8880 -M 14.0 * 16.4 16.8 98
GRAVE SPRINGS 8550 10.8 -M * 14.0 12.8 109
HANSEN SAWMILL 8760 5.5 6.3 87 13.6 10.6 128
MIDDLE POWDER 7760 10.9 14.6 75 13.3 15.1 88
POWDER RIVER PASS 9480 10.2 9.6 106 16.1 15.0 107
SUCKER CREEK 8880 10.9 13.1 83 17.0 16.9 101
TIE CREEK 6870 3.3 -M * 16.4 14.1 116
----- -----
Basin wide percent of average 88 107
BELLE FOURCHE
BLIND PARK 6890 .0 8.5 0 14.0 14.2 99
NORTH RAPID CREEK 6130 1.2 -M * 12.0 -M *
WARREN PEAK 6520 5.5 8.5 65 12.6 10.6 119
----- -----
Basin wide percent of average 32 107
UPPER N. PLATTE RIVER
COLUMBINE 9400 10.6 20.4 52 25.5 28.4 90
DIVIDE PEAK 8800 14.0 17.8 79 22.3 27.6 81
ELK RIVER 8700 9.3 14.6 64 22.3 22.3 100
JOE WRIGHT 10120 21.0 24.5 86 27.5 30.7 90
NORTH FRENCH CREEK 10100 30.8 28.8 107 32.7 28.4 115
OLD BATTLE 10000 34.4 37.9 91 38.9 36.1 108
SOUTH BRUSH CREEK 8400 1.8 9.6 19 14.3 20.9 68
TOWER 10500 52.7 51.0 103 45.2 43.8 103
WEBBER SPRINGS 9200 17.4 24.8 70 28.5 30.9 92
WILLOW CREEK PASS 9540 8.9 12.9 69 9.7 15.7 62
----- -----
Basin wide percent of average 83 94
LOWER N. PLATTE - SWEETWATER - LARAMIE
BROOKLYN LAKE 10240 22.4 28.0 80 24.7 24.1 102
CASPER MTN. 7900 8.4 16.4 51 15.1 19.2 79
DEADMAN HILL 10220 16.2 19.0 85 17.3 21.4 81
DEER PARK 9700 -M -M * 24.7 -M *
LAPRELE CREEK 8320 1.0 5.7 18 12.7 15.0 85
RENO HILL 8400 7.5 12.4 60 13.6 22.6 60
ROACH 9700 14.2 17.7 80 19.6 26.2 75
SAND LAKE 10080 30.1 36.8 82 27.3 25.1 109
SOUTH PASS 9040 15.1 17.8 85 21.2 20.9 101
WINDY PEAK 7840 1.5 7.0 21 10.7 12.5 86
----- -----
Basin wide percent of average 72 87
LITTLE SNAKE RIVER
BATTLE MOUNTAIN 7440 .2 3.8 5 17.6 18.7 94
DIVIDE PEAK 8800 14.0 17.8 79 22.3 27.6 81
OLD BATTLE 10000 34.4 37.9 91 38.9 36.1 108
SANDSTONE RS 8150 4.7 8.2 57 21.5 23.3 92
WHISKEY PARK 8950 27.1 28.7 94 31.2 34.4 91
----- -----
Basin wide percent of average 83 94
UPPER GREEN RIVER
BIG SANDY OPENING 9100 10.3 13.0 79 14.0 18.7 75
BLIND BULL SUM 8650 22.3 22.6 99 20.9 27.2 77
EAST RIM DIVIDE 7930 10.9 14.4 76 13.3 17.5 76
ELKHART PARK G.S. 9400 10.0 13.1 76 15.4 18.4 84
GROS VENTRE SUMMIT 8775 10.9 13.1 83 14.9 18.3 81
KENDALL R.S. 7740 6.9 8.3 83 16.7 17.8 94
LOOMIS PARK 8240 -M 14.3 * 19.2 21.6 89
NEW FORK LAKE 8340 5.6 8.5 66 12.9 16.6 78
SNIDER BASIN 8250 10.2 12.0 85 14.1 17.4 81
SPRING CREEK DIVIDE 9000 20.4 28.8 71 24.2 31.1 78
TRIPLE PEAK 8500 15.5 24.2 64 24.3 35.4 69
----- -----
Basin wide percent of average 78 79
LOWER GREEN RIVER
HAMS FORK 7840 1.0 4.5 22 13.1 15.4 85
HEWINTA 9500 6.8 4.2 162 17.2 16.6 104
HICKERSON PARK 9150 9.0 2.4 375 15.5 12.6 123
HOLE-IN-ROCK 9150 5.9 1.9 311 13.4 12.6 106
INDIAN CREEK 9425 21.9 28.0 78 21.9 29.5 74
KELLEY R.S. 8180 10.4 13.9 75 18.4 21.5 86
STEEL CREEK PARK 10100 20.5 18.4 111 21.9 16.5 133
----- -----
Basin wide percent of average 103 97
UPPER BEAR RIVER
BUG LAKE 7950 15.6 14.7 106 23.6 22.8 104
HAYDEN FORK 9400 8.4 5.3 158 23.7 23.3 102
KELLEY R.S. 8180 10.4 13.9 75 18.4 21.5 86
LILY LAKE 9050 9.8 8.1 121 20.7 18.3 113
MONTE CRISTO 8960 25.1 25.3 99 29.5 30.6 96
SALT RIVER SUMMIT 7600 8.8 8.5 104 20.5 19.4 106
TRIAL LAKE 9960 22.4 23.4 96 26.5 28.6 93
----- -----
Basin wide percent of average 101 99
-----------------------------------------------------------------------------
-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.