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 MONDAY: MAY 24 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 2.8 0 17.0 26.3 65 COTTONWOOD CREEK 7670 10.7 9.9 108 29.0 34.8 83 GRAND TARGHEE 9260 45.1 -M * 37.3 -M * GRANITE CREEK 6770 .4 4.6 9 16.1 24.2 67 GRASSY LAKE 7265 13.4 21.2 63 32.5 43.9 74 GROS VENTRE SUMMIT 8750 5.2 7.2 72 13.4 17.0 79 GUNSIGHT PASS 9820 11.1 -M * 16.2 -M * LEWIS LAKE DIVIDE 7850 13.7 24.3 56 27.3 44.4 61 PHILLIPS BENCH 8200 12.9 19.6 66 25.5 35.7 71 SALT RIVER SUMMIT 7760 .2 1.0 20* 16.9 23.4 72 SNAKE RIVER STATION 6920 .0 1.6 0* 20.4 27.6 74 SPRING CREEK DIVIDE 9000 21.3 20.6 103 24.9 32.4 77 THUMB DIVIDE 7980 .3 6.2 5 17.2 24.1 71 TOGWOTEE PASS 9580 23.1 25.5 91 -M 31.7 * TWO OCEAN PLATEAU 9240 25.2 28.7 88 23.3 35.2 66 WILLOW CREEK 8380 19.3 20.6 94 37.4 41.4 90 ----- ----- Basin wide percent of average 75 73 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.9 23.8 71 18.5 26.1 71 BLACK BEAR 8170 22.6 32.7 69 32.8 49.1 67 CANYON 7870 1.8 4.0 45 14.9 19.7 76 FISHER CREEK 9100 25.0 33.7 74 30.3 45.4 67 MADISON PLATEAU 7750 11.7 14.9 79 26.1 33.2 79 NORTHEAST ENTRANCE 7350 .0 1.2 0 12.4 16.8 74 PARKER PEAK 9400 17.9 22.1 81 17.5 22.2 79 SYLVAN LAKE 8420 11.0 16.5 67 23.6 27.7 85 THUMB DIVIDE 7980 .3 6.2 5 17.2 24.1 71 TWO OCEAN PLATEAU 9240 25.2 28.7 88 23.3 35.2 66 WHISKEY CREEK 6800 2.7 5.5 49 16.7 26.4 63 WHITE MILL 8700 16.5 22.1 75 21.1 34.1 62 WOLVERINE 7650 .0 .9 0* 10.0 17.5 57 ----- ----- Basin wide percent of average 71 70 WIND RIVER BURROUGHS CREEK 8750 9.6 7.1 135 14.0 21.7 65 COLD SPRINGS 9630 7.9 1.6 494 19.1 16.3 117 DEER PARK 9700 21.8 14.7 148 28.5 29.9 95 HOBBS PARK 10100 26.7 14.1 189 28.3 20.0 142 LITTLE WARM 9370 8.7 4.4 198 15.4 19.2 80 SOUTH PASS 9040 18.1 9.8 185 26.3 25.3 104 ST. LAWRENCE ALT 8620 7.0 1.4 500 20.2 14.4 140 TOGWOTEE PASS 9580 23.1 25.5 91 -M 31.7 * TOWNSEND CREEK 8700 14.3 3.3 433 24.9 18.0 138 ----- ----- Basin wide percent of average 168 107 BIGHORN BASIN BALD MTN. 9380 18.0 20.8 87 17.2 24.4 70 BEAR TRAP MEADOW 8200 .0 .0 100* 13.8 13.3 104 BLACKWATER 9780 22.6 28.1 80 22.8 27.7 82 BONE SPRINGS DIV 9350 13.7 13.0 105 16.4 21.3 77 EVENING STAR 9200 18.6 30.3 61 26.8 33.1 81 GRAVE SPRINGS 8550 9.2 3.2 288 17.9 15.4 116 KIRWIN 9550 11.8 8.8 134 16.9 16.6 102 MARQUETTE 8760 12.9 6.6 195 18.2 16.9 108 MIDDLE POWDER 7760 9.6 6.8 141 13.9 18.3 76 OWL CREEK 8975 .6 1.2 50 12.4 10.3 120 POWDER RIVER PASS 9480 6.4 5.0 128 16.0 18.6 86 SHELL CREEK 9580 15.0 14.1 106 17.3 19.5 89 SYLVAN LAKE 8420 11.0 16.5 67 23.6 27.7 85 SYLVAN ROAD 7120 .0 .5 0* 16.6 22.5 74 TIMBER CREEK 7950 2.4 1.2 200 14.7 13.4 110 YOUNTS PEAK 8350 9.5 11.9 80 13.9 21.1 66 ----- ----- Basin wide percent of average 96 87 SHOSHONE RIVER BLACKWATER 9780 22.6 28.1 80 22.8 27.7 82 EVENING STAR 9200 18.6 30.3 61 26.8 33.1 81 KIRWIN 9550 11.8 8.8 134 16.9 16.6 102 MARQUETTE 8760 12.9 6.6 195 18.2 16.9 108 SYLVAN LAKE 8420 11.0 16.5 67 23.6 27.7 85 SYLVAN ROAD 7120 .0 .5 0* 16.6 22.5 74 YOUNTS PEAK 8350 9.5 11.9 80 13.9 21.1 66 ----- ----- Basin wide percent of average 84 84 POWDER-TONGUE BEAR TRAP MEADOW 8200 .0 .0 100* 13.8 13.3 104 BIG GOOSE 7990 11.1 6.9 161 19.3 15.6 124 BONE SPRINGS DIV 9350 13.7 13.0 105 16.4 21.3 77 BURGESS JUNCTION 7880 12.0 6.7 179 17.5 17.8 98 CLOUD PEAK RESERVOIR 9860 18.5 12.0 154 21.2 20.5 103 DOME LAKE 8880 11.9 6.8 175 20.2 19.7 103 GRAVE SPRINGS 8550 9.2 3.2 288 17.9 15.4 116 HANSEN SAWMILL 8360 2.0 .8 250 15.4 13.2 117 MIDDLE POWDER 7760 9.6 6.8 141 13.9 18.3 76 POWDER RIVER PASS 9480 6.4 5.0 128 16.0 18.6 86 SUCKER CREEK 8880 15.6 7.2 217 22.4 20.5 109 TIE CREEK 6870 2.7 .1 2700* 19.4 16.3 119 ----- ----- Basin wide percent of average 165 101 BELLE FOURCHE BLIND PARK 6890 .0 .0 100* 18.9 16.9 112 COLE CANYON 5910 .0 .0 100* 18.0 12.0 150 NORTH RAPID CREEK 6130 .0 .1 0* 17.8 13.3 134 ----- ----- Basin wide percent of average 0* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 10.3 7.2 143 30.7 31.5 97 DIVIDE PEAK 8880 14.7 8.1 181 32.0 26.7 120 ELK RIVER 8700 5.5 3.8 145 27.3 25.3 108 JOE WRIGHT 10120 -M 21.4 * -M 33.7 * NORTH FRENCH CREEK 10130 43.0 29.9 144 45.3 33.2 136 OLD BATTLE 10000 42.5 31.7 134 47.4 43.2 110 SAGE CREEK BASIN 7850 .0 4.7 0 17.7 15.5 114 SOUTH BRUSH CREEK 8440 5.4 3.8 142 27.3 22.8 120 TOWER 10500 43.4 48.7 89 45.4 48.9 93 WEBBER SPRINGS 9250 20.6 12.5 165 36.9 33.9 109 WILLOW CREEK PASS 9540 10.6 7.4 143 18.5 17.9 103 ----- ----- Basin wide percent of average 124 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.7 18.0 126 30.2 30.2 100 CASPER MTN. 7900 11.0 7.7 143 21.3 22.9 93 DEADMAN HILL 10220 -M 15.4 * -M 23.8 * DEER PARK 9700 21.8 14.7 148 28.5 29.9 95 LAPRELE CREEK 8375 .0 2.0 0 19.3 19.2 101 RENO HILL 8400 14.6 6.3 232 27.1 23.7 114 ROACH 9700 18.8 9.7 194 29.8 25.4 117 SAND LAKE 10050 39.5 32.2 123 41.4 33.1 125 SOUTH PASS 9040 18.1 9.8 185 26.3 25.3 104 WINDY PEAK 7900 .4 .7 57* 19.8 16.1 123 ----- ----- Basin wide percent of average 145 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 20.4 20.4 100 DIVIDE PEAK 8880 14.7 8.1 181 32.0 26.7 120 OLD BATTLE 10000 42.5 31.7 134 47.4 43.2 110 SANDSTONE RS 8150 -M 1.5 * 23.4 24.1 97 WHISKEY PARK 8950 28.6 21.3 134 40.9 36.9 111 ----- ----- Basin wide percent of average 140 108 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.3 5.6 77 13.6 17.9 76 BLIND BULL SUM 8650 19.0 22.1 86 18.2 27.3 67 EAST RIM DIVIDE 7930 .2 5.8 3 10.0 15.5 65 ELKHART PARK G.S. 9400 5.0 6.7 75 12.5 18.2 69 GROS VENTRE SUMMIT 8750 5.2 7.2 72 13.4 17.0 79 GUNSIGHT PASS 9820 11.1 -M * 16.2 -M * KENDALL R.S. 7740 .2 .0 * 12.0 18.1 66 LOOMIS PARK 8240 .2 6.4 3 14.1 21.8 65 NEW FORK LAKE 8340 .0 .8 0* 10.0 15.2 66 POCKET CREEK 9360 7.6 -M * 15.0 -M * SNIDER BASIN 8060 1.9 4.0 48 16.4 19.9 82 SPRING CREEK DIVIDE 9000 21.3 20.6 103 24.9 32.4 77 TRIPLE PEAK 8500 14.0 11.7 120 28.3 31.1 91 ----- ----- Basin wide percent of average 78 74 LOWER GREEN RIVER HAMS FORK 7840 .4 .0 * 15.2 16.4 93 HEWINTA 9519 3.3 2.1 157 18.0 19.7 91 HICKERSON PARK 9145 .1 .6 17* 15.9 12.0 133 HOLE-IN-ROCK 9150 .0 .5 0* 15.4 11.6 133 INDIAN CREEK 9425 20.5 19.9 103 24.1 31.7 76 KELLEY R.S. 8180 5.6 5.6 100 19.2 25.5 75 STEEL CREEK PARK 10200 21.0 15.7 134 22.7 22.4 101 ----- ----- Basin wide percent of average 115 94 UPPER BEAR RIVER BUG LAKE 7950 8.4 6.5 129 20.7 24.4 85 HAYDEN FORK 9212 1.0 4.1 24 24.6 27.6 89 KELLEY R.S. 8180 5.6 5.6 100 19.2 25.5 75 LILY LAKE 9156 7.5 3.7 203 20.9 23.3 90 MONTE CRISTO 8960 18.2 18.2 100 27.0 33.2 81 SALT RIVER SUMMIT 7760 .2 1.0 20* 16.9 23.4 72 TRIAL LAKE 9992 18.1 19.5 93 22.5 32.3 70 ----- ----- Basin wide percent of average 101 80 ----------------------------------------------------------------------------- -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 1971-2000. 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.