Supercell over Laramie
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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 SATURDAY: MAY 17 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.3 5.6 202 31.2 25.8 121 COTTONWOOD CREEK 7670 19.0 13.0 146 29.9 34.1 88 GRAND TARGHEE 9260 59.0 -M * 41.9 -M * GRANITE CREEK 6770 10.6 7.1 149 25.5 23.7 108 GRASSY LAKE 7265 31.0 25.3 123 49.8 43.1 116 GROS VENTRE SUMMIT 8750 9.5 9.2 103 16.9 16.5 102 GUNSIGHT PASS 9820 10.7 -M * 18.0 -M * LEWIS LAKE DIVIDE 7850 34.9 27.9 125 42.5 43.7 97 PHILLIPS BENCH 8200 27.8 23.1 120 39.4 35.0 113 SALT RIVER SUMMIT 7760 6.8 3.9 174 18.9 23.0 82 SNAKE RIVER STATION 6920 9.5 4.7 202 31.6 27.1 117 SPRING CREEK DIVIDE 9000 21.2 23.8 89 27.5 31.8 86 THUMB DIVIDE 7980 12.0 8.8 136 24.2 23.6 103 TOGWOTEE PASS 9580 30.8 27.0 114 35.3 31.0 114 TWO OCEAN PLATEAU 9240 -M 30.3 * -M 34.4 * WILLOW CREEK 8380 27.7 24.2 114 46.3 40.5 114 ----- ----- Basin wide percent of average 124 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.2 25.2 112 29.0 25.4 114 BLACK BEAR 8170 49.2 35.8 137 49.5 48.3 102 CANYON 7870 14.3 6.3 227 24.5 19.1 128 FISHER CREEK 9100 48.0 36.0 133 45.5 44.4 102 MADISON PLATEAU 7750 29.6 18.6 159 37.8 32.4 117 NORTHEAST ENTRANCE 7350 1.9 2.6 73 16.4 16.2 101 PARKER PEAK 9400 32.5 23.7 137 -M 21.5 * SYLVAN LAKE 8420 20.6 19.6 105 32.1 26.9 119 THUMB DIVIDE 7980 12.0 8.8 136 24.2 23.6 103 TWO OCEAN PLATEAU 9240 -M 30.3 * -M 34.4 * WHISKEY CREEK 6800 17.2 8.7 198 29.3 25.8 114 WHITE MILL 8700 30.5 24.2 126 32.3 33.3 97 WOLVERINE 7650 2.2 2.4 92 17.4 16.9 103 ----- ----- Basin wide percent of average 135 108 WIND RIVER BURROUGHS CREEK 8750 13.9 9.9 140 21.3 21.1 101 COLD SPRINGS 9630 .0 2.9 0 13.4 15.7 85 DEER PARK 9700 16.1 16.7 96 25.1 29.1 86 HOBBS PARK 10100 17.4 16.3 107 20.2 19.2 105 LITTLE WARM 9370 6.3 7.1 89 17.6 18.6 95 SOUTH PASS 9040 12.4 13.0 95 21.8 24.7 88 ST. LAWRENCE ALT 8620 .3 3.1 10 11.9 13.9 86 TOGWOTEE PASS 9580 30.8 27.0 114 35.3 31.0 114 TOWNSEND CREEK 8700 5.1 5.2 98 16.3 17.4 94 ----- ----- Basin wide percent of average 101 96 BIGHORN BASIN BALD MTN. 9380 20.5 22.7 90 20.7 23.6 88 BEAR TRAP MEADOW 8200 2.3 .4 575 12.8 12.7 101 BLACKWATER 9780 30.8 28.7 107 29.8 26.9 111 BONE SPRINGS DIV 9350 20.7 15.7 132 23.6 20.5 115 EVENING STAR 9200 31.5 32.0 98 40.4 32.3 125 GRAVE SPRINGS 8550 11.1 6.7 166 14.5 14.8 98 KIRWIN 9550 11.5 10.6 108 17.9 16.0 112 MARQUETTE 8760 9.3 8.4 111 14.9 16.0 93 MIDDLE POWDER 7760 14.3 10.1 142 14.4 17.7 81 OWL CREEK 8975 .1 2.0 5 9.4 9.7 97 POWDER RIVER PASS 9480 11.9 7.4 161 19.1 17.9 107 SHELL CREEK 9580 19.4 16.0 121 20.8 18.9 110 SYLVAN LAKE 8420 20.6 19.6 105 32.1 26.9 119 SYLVAN ROAD 7120 -M 2.3 * 24.4 22.0 111 TIMBER CREEK 7950 2.5 2.0 125 12.5 12.6 99 YOUNTS PEAK 8350 15.6 14.6 107 20.2 20.5 99 ----- ----- Basin wide percent of average 113 106 SHOSHONE RIVER BLACKWATER 9780 30.8 28.7 107 29.8 26.9 111 EVENING STAR 9200 31.5 32.0 98 40.4 32.3 125 KIRWIN 9550 11.5 10.6 108 17.9 16.0 112 MARQUETTE 8760 9.3 8.4 111 14.9 16.0 93 SYLVAN LAKE 8420 20.6 19.6 105 32.1 26.9 119 SYLVAN ROAD 7120 -M 2.3 * 24.4 22.0 111 YOUNTS PEAK 8350 15.6 14.6 107 20.2 20.5 99 ----- ----- Basin wide percent of average 105 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.3 .4 575 12.8 12.7 101 BIG GOOSE 7990 10.8 8.7 124 18.2 15.0 121 BONE SPRINGS DIV 9350 20.7 15.7 132 23.6 20.5 115 BURGESS JUNCTION 7880 16.7 9.3 180 20.4 17.2 119 CLOUD PEAK RESERVOIR 9860 17.9 14.3 125 22.1 19.7 112 DOME LAKE 8880 12.4 9.6 129 21.3 19.0 112 GRAVE SPRINGS 8550 11.1 6.7 166 14.5 14.8 98 HANSEN SAWMILL 8360 1.1 1.8 61 13.2 12.6 105 MIDDLE POWDER 7760 14.3 10.1 142 14.4 17.7 81 POWDER RIVER PASS 9480 11.9 7.4 161 19.1 17.9 107 SUCKER CREEK 8880 18.1 9.4 193 24.3 19.8 123 TIE CREEK 6870 4.1 1.2 342 17.4 15.6 112 ----- ----- Basin wide percent of average 149 109 BELLE FOURCHE BLIND PARK 6890 -M .0 * 16.7 16.2 103 COLE CANYON 5910 .4 .5 80 14.6 11.4 128 NORTH RAPID CREEK 6130 -M .4 * 16.8 12.9 130 ----- ----- Basin wide percent of average 80* 119 UPPER N. PLATTE RIVER COLUMBINE 9160 21.1 11.7 180 35.0 30.9 113 DIVIDE PEAK 8880 20.4 11.6 176 29.2 26.1 112 ELK RIVER 8700 16.3 6.5 251 28.8 24.7 117 JOE WRIGHT 10120 29.6 23.4 126 36.8 32.8 112 NORTH FRENCH CREEK 10130 34.9 32.6 107 37.4 32.3 116 OLD BATTLE 10000 40.5 34.7 117 48.1 42.4 113 SAGE CREEK BASIN 7850 6.2 6.7 93 20.6 15.1 136 SOUTH BRUSH CREEK 8440 4.2 5.8 72 21.7 22.1 98 TOWER 10500 51.5 51.0 101 51.1 48.0 106 WEBBER SPRINGS 9250 24.7 16.7 148 38.0 33.2 114 WILLOW CREEK PASS 9540 21.8 10.4 210 21.5 17.3 124 ----- ----- Basin wide percent of average 128 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.5 21.9 94 28.3 29.4 96 CASPER MTN. 7900 15.8 10.7 148 21.4 22.1 97 DEADMAN HILL 10220 22.2 17.5 127 26.1 23.1 113 DEER PARK 9700 16.1 16.7 96 25.1 29.1 86 LAPRELE CREEK 8375 2.7 3.1 87 16.7 18.5 90 RENO HILL 8400 17.7 8.8 201 26.3 22.8 115 ROACH 9700 20.6 12.5 165 28.8 24.6 117 SAND LAKE 10050 35.4 34.9 101 37.9 32.2 118 SOUTH PASS 9040 12.4 13.0 95 21.8 24.7 88 WINDY PEAK 7900 1.6 1.4 114 14.3 15.4 93 ----- ----- Basin wide percent of average 117 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 20.7 19.9 104 DIVIDE PEAK 8880 20.4 11.6 176 29.2 26.1 112 OLD BATTLE 10000 40.5 34.7 117 48.1 42.4 113 SANDSTONE RS 8150 9.1 3.1 294 26.0 23.6 110 WHISKEY PARK 8950 36.3 25.4 143 43.6 36.2 120 ----- ----- Basin wide percent of average 142 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 7.0 8.2 85 15.9 17.4 91 BLIND BULL SUM 8650 26.7 24.3 110 20.7 26.8 77 EAST RIM DIVIDE 7930 1.9 8.4 23 12.9 15.0 86 ELKHART PARK G.S. 9400 7.7 8.8 88 14.0 17.6 80 GROS VENTRE SUMMIT 8750 9.5 9.2 103 16.9 16.5 102 GUNSIGHT PASS 9820 10.7 -M * 18.0 -M * KENDALL R.S. 7740 .6 2.7 22 15.9 17.7 90 LOOMIS PARK 8240 6.9 8.9 78 20.5 21.3 96 NEW FORK LAKE 8340 1.0 3.1 32 11.8 14.7 80 SNIDER BASIN 8060 4.7 6.8 69 16.1 19.6 82 SPRING CREEK DIVIDE 9000 21.2 23.8 89 27.5 31.8 86 TRIPLE PEAK 8500 18.9 15.8 120 33.6 30.5 110 ----- ----- Basin wide percent of average 88 90 LOWER GREEN RIVER HAMS FORK 7840 .5 .4 125 12.8 16.0 80 HEWINTA 9519 4.9 3.8 129 20.4 19.2 106 HICKERSON PARK 9145 .0 1.6 0 11.4 11.5 99 HOLE-IN-ROCK 9150 .0 1.4 0 12.1 11.1 109 INDIAN CREEK 9425 -M 22.9 * -M 31.2 * KELLEY R.S. 8180 9.7 8.2 118 21.3 25.0 85 STEEL CREEK PARK 10200 20.3 17.6 115 22.6 21.8 104 ----- ----- Basin wide percent of average 107 96 UPPER BEAR RIVER BUG LAKE 7950 13.1 9.7 135 20.1 23.9 84 HAYDEN FORK 9212 5.6 6.5 86 27.6 27.0 102 KELLEY R.S. 8180 9.7 8.2 118 21.3 25.0 85 LILY LAKE 9156 6.7 5.6 120 21.6 22.8 95 MONTE CRISTO 8960 22.7 21.6 105 30.5 32.5 94 SALT RIVER SUMMIT 7760 6.8 3.9 174 18.9 23.0 82 TRIAL LAKE 9992 18.8 22.4 84 28.9 31.6 91 ----- ----- Basin wide percent of average 107 91 ----------------------------------------------------------------------------- -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.