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 FRIDAY: MAY 21 , 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 4.3 0 16.1 26.1 62 COTTONWOOD CREEK 7670 11.7 11.5 102 28.3 34.5 82 GRAND TARGHEE 9260 43.4 -M * 35.6 -M * GRANITE CREEK 6770 .0 5.9 0 15.8 24.0 66 GRASSY LAKE 7265 13.6 23.3 58 31.5 43.5 72 GROS VENTRE SUMMIT 8750 5.0 8.2 61 12.3 16.7 74 GUNSIGHT PASS 9820 10.7 -M * 15.1 -M * LEWIS LAKE DIVIDE 7850 13.5 26.2 52 26.3 44.0 60 PHILLIPS BENCH 8200 12.8 21.4 60 24.9 35.4 70 SALT RIVER SUMMIT 7760 1.2 2.5 48 16.4 23.2 71 SNAKE RIVER STATION 6920 .0 3.1 0 19.7 27.3 72 SPRING CREEK DIVIDE 9000 20.6 22.3 92 23.7 32.1 74 THUMB DIVIDE 7980 .1 7.5 1 16.6 23.8 70 TOGWOTEE PASS 9580 22.8 26.3 87 -M 31.4 * TWO OCEAN PLATEAU 9240 24.1 29.6 81 22.2 34.8 64 WILLOW CREEK 8380 19.0 22.5 84 36.0 40.9 88 ----- ----- Basin wide percent of average 67 71 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.8 24.4 69 18.2 25.8 71 BLACK BEAR 8170 23.5 34.5 68 32.0 48.7 66 CANYON 7870 2.4 5.2 46 14.4 19.4 74 FISHER CREEK 9100 24.4 35.0 70 29.8 44.9 66 MADISON PLATEAU 7750 12.3 16.9 73 25.5 32.8 78 NORTHEAST ENTRANCE 7350 .0 1.7 0 12.1 16.5 73 PARKER PEAK 9400 18.0 23.1 78 17.3 21.8 79 SYLVAN LAKE 8420 10.9 18.2 60 22.8 27.3 84 THUMB DIVIDE 7980 .1 7.5 1 16.6 23.8 70 TWO OCEAN PLATEAU 9240 24.1 29.6 81 22.2 34.8 64 WHISKEY CREEK 6800 4.1 7.2 57 16.4 26.1 63 WHITE MILL 8700 16.8 23.4 72 20.9 33.7 62 WOLVERINE 7650 .0 1.7 0 9.8 17.2 57 ----- ----- Basin wide percent of average 67 69 WIND RIVER BURROUGHS CREEK 8750 9.3 8.8 106 13.2 21.4 62 COLD SPRINGS 9630 7.4 2.3 322 18.4 16.0 115 DEER PARK 9700 21.6 16.4 132 28.1 29.5 95 HOBBS PARK 10100 25.8 15.5 166 27.6 19.6 141 LITTLE WARM 9370 8.5 5.9 144 14.5 18.9 77 SOUTH PASS 9040 17.9 11.6 154 26.0 25.0 104 ST. LAWRENCE ALT 8620 6.8 2.2 309 19.5 14.2 137 TOGWOTEE PASS 9580 22.8 26.3 87 -M 31.4 * TOWNSEND CREEK 8700 14.2 4.3 330 24.8 17.7 140 ----- ----- Basin wide percent of average 144 106 BIGHORN BASIN BALD MTN. 9380 17.1 22.0 78 16.1 24.0 67 BEAR TRAP MEADOW 8200 1.2 .1 1200* 12.9 13.0 99 BLACKWATER 9780 22.0 28.7 77 22.3 27.3 82 BONE SPRINGS DIV 9350 12.9 14.6 88 15.5 20.9 74 EVENING STAR 9200 18.5 31.3 59 26.4 32.7 81 GRAVE SPRINGS 8550 9.5 5.2 183 17.4 15.1 115 KIRWIN 9550 11.6 10.0 116 16.1 16.3 99 MARQUETTE 8760 12.7 7.8 163 17.7 16.5 107 MIDDLE POWDER 7760 10.6 8.5 125 13.6 18.0 76 OWL CREEK 8975 .3 1.6 19 11.6 10.0 116 POWDER RIVER PASS 9480 6.0 6.4 94 15.3 18.3 84 SHELL CREEK 9580 14.1 15.1 93 16.4 19.2 85 SYLVAN LAKE 8420 10.9 18.2 60 22.8 27.3 84 SYLVAN ROAD 7120 .0 1.4 0 16.3 22.3 73 TIMBER CREEK 7950 2.8 1.7 165 14.1 13.0 108 YOUNTS PEAK 8350 9.8 13.5 73 13.3 20.8 64 ----- ----- Basin wide percent of average 86 85 SHOSHONE RIVER BLACKWATER 9780 22.0 28.7 77 22.3 27.3 82 EVENING STAR 9200 18.5 31.3 59 26.4 32.7 81 KIRWIN 9550 11.6 10.0 116 16.1 16.3 99 MARQUETTE 8760 12.7 7.8 163 17.7 16.5 107 SYLVAN LAKE 8420 10.9 18.2 60 22.8 27.3 84 SYLVAN ROAD 7120 .0 1.4 0 16.3 22.3 73 YOUNTS PEAK 8350 9.8 13.5 73 13.3 20.8 64 ----- ----- Basin wide percent of average 77 83 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.2 .1 1200* 12.9 13.0 99 BIG GOOSE 7990 11.4 7.9 144 18.8 15.3 123 BONE SPRINGS DIV 9350 12.9 14.6 88 15.5 20.9 74 BURGESS JUNCTION 7880 12.2 8.1 151 16.7 17.5 95 CLOUD PEAK RESERVOIR 9860 17.7 13.4 132 20.0 20.1 100 DOME LAKE 8880 12.1 8.5 142 19.7 19.3 102 GRAVE SPRINGS 8550 9.5 5.2 183 17.4 15.1 115 HANSEN SAWMILL 8360 2.5 1.2 208 14.3 12.9 111 MIDDLE POWDER 7760 10.6 8.5 125 13.6 18.0 76 POWDER RIVER PASS 9480 6.0 6.4 94 15.3 18.3 84 SUCKER CREEK 8880 15.7 8.5 185 21.8 20.2 108 TIE CREEK 6870 3.5 .6 583* 18.8 16.0 118 ----- ----- Basin wide percent of average 139 99 BELLE FOURCHE BLIND PARK 6890 .0 .0 100* 18.6 16.5 113 COLE CANYON 5910 .0 .3 0* 17.9 11.7 153 NORTH RAPID CREEK 6130 .0 .2 0* 17.2 13.1 131 ----- ----- Basin wide percent of average 0* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 14.4 9.4 153 30.6 31.2 98 DIVIDE PEAK 8880 16.7 9.9 169 31.5 26.4 119 ELK RIVER 8700 10.1 5.1 198 27.2 25.0 109 JOE WRIGHT 10120 25.6 22.5 114 31.4 33.2 95 NORTH FRENCH CREEK 10130 -M 31.4 * -M 32.8 * OLD BATTLE 10000 43.2 33.3 130 47.1 42.8 110 SAGE CREEK BASIN 7850 .0 5.7 0 17.3 15.3 113 SOUTH BRUSH CREEK 8440 8.6 4.8 179 27.1 22.5 120 TOWER 10500 45.1 50.0 90 45.3 48.5 93 WEBBER SPRINGS 9250 23.6 14.6 162 36.7 33.5 110 WILLOW CREEK PASS 9540 13.5 8.9 152 18.5 17.6 105 ----- ----- Basin wide percent of average 122 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.3 20.0 122 30.2 29.8 101 CASPER MTN. 7900 12.2 9.2 133 21.2 22.5 94 DEADMAN HILL 10220 -M 16.5 * -M 23.4 * DEER PARK 9700 21.6 16.4 132 28.1 29.5 95 LAPRELE CREEK 8375 2.2 2.5 88 19.3 18.9 102 RENO HILL 8400 16.2 7.6 213 26.9 23.3 115 ROACH 9700 21.7 11.1 195 29.8 25.0 119 SAND LAKE 10050 40.7 33.7 121 41.1 32.6 126 SOUTH PASS 9040 17.9 11.6 154 26.0 25.0 104 WINDY PEAK 7900 3.1 1.0 310 19.0 15.8 120 ----- ----- Basin wide percent of average 141 109 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 20.3 20.2 100 DIVIDE PEAK 8880 16.7 9.9 169 31.5 26.4 119 OLD BATTLE 10000 43.2 33.3 130 47.1 42.8 110 SANDSTONE RS 8150 -M 2.2 * 23.2 23.8 97 WHISKEY PARK 8950 27.7 23.5 118 40.8 36.6 111 ----- ----- Basin wide percent of average 131 109 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.7 7.0 67 13.0 17.6 74 BLIND BULL SUM 8650 18.2 23.3 78 16.9 27.1 62 EAST RIM DIVIDE 7930 .1 7.1 1 9.3 15.2 61 ELKHART PARK G.S. 9400 5.1 7.8 65 11.8 17.9 66 GROS VENTRE SUMMIT 8750 5.0 8.2 61 12.3 16.7 74 GUNSIGHT PASS 9820 10.7 -M * 15.1 -M * KENDALL R.S. 7740 .1 1.1 9* 11.3 17.9 63 LOOMIS PARK 8240 .1 7.7 1 13.2 21.6 61 NEW FORK LAKE 8340 .0 1.9 0 8.8 14.9 59 POCKET CREEK 9360 7.6 -M * 14.5 -M * SNIDER BASIN 8060 3.4 5.4 63 15.7 19.7 80 SPRING CREEK DIVIDE 9000 20.6 22.3 92 23.7 32.1 74 TRIPLE PEAK 8500 14.6 13.8 106 27.2 30.8 88 ----- ----- Basin wide percent of average 68 70 LOWER GREEN RIVER HAMS FORK 7840 .4 .0 * 14.2 16.2 88 HEWINTA 9519 5.3 2.9 183 17.8 19.4 92 HICKERSON PARK 9145 .0 1.1 0 15.4 11.7 132 HOLE-IN-ROCK 9150 .0 .9 0 15.2 11.3 135 INDIAN CREEK 9425 19.3 21.4 90 22.6 31.4 72 KELLEY R.S. 8180 5.3 7.0 76 17.6 25.3 70 STEEL CREEK PARK 10200 20.9 16.8 124 22.3 22.1 101 ----- ----- Basin wide percent of average 102 91 UPPER BEAR RIVER BUG LAKE 7950 8.0 8.1 99 19.5 24.2 81 HAYDEN FORK 9212 2.9 5.2 56 24.3 27.3 89 KELLEY R.S. 8180 5.3 7.0 76 17.6 25.3 70 LILY LAKE 9156 9.0 4.6 196 20.5 23.0 89 MONTE CRISTO 8960 16.4 20.0 82 25.2 32.8 77 SALT RIVER SUMMIT 7760 1.2 2.5 48 16.4 23.2 71 TRIAL LAKE 9992 19.1 21.0 91 22.1 31.9 69 ----- ----- Basin wide percent of average 90 78 ----------------------------------------------------------------------------- -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.