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 17 , 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 6.1 0 16.0 25.7 62 COTTONWOOD CREEK 7670 14.1 13.4 105 27.6 34.0 81 GRAND TARGHEE 9260 44.8 -M * 35.1 -M * GRANITE CREEK 6770 .0 7.5 0 15.2 23.6 64 GRASSY LAKE 7265 16.5 25.9 64 31.0 43.0 72 GROS VENTRE SUMMIT 8750 7.5 9.6 78 12.0 16.5 73 GUNSIGHT PASS 9820 11.3 -M * 15.1 -M * LEWIS LAKE DIVIDE 7850 17.2 28.4 61 26.3 43.6 60 PHILLIPS BENCH 8200 15.8 23.6 67 24.9 34.9 71 SALT RIVER SUMMIT 7760 4.2 4.4 95 15.8 22.9 69 SNAKE RIVER STATION 6920 .0 5.2 0 19.3 27.0 71 SPRING CREEK DIVIDE 9000 22.8 24.2 94 23.6 31.7 74 THUMB DIVIDE 7980 3.0 9.3 32 16.6 23.5 71 TOGWOTEE PASS 9580 23.1 27.2 85 -M 30.9 * TWO OCEAN PLATEAU 9240 25.5 30.5 84 22.2 34.2 65 WILLOW CREEK 8380 20.4 24.7 83 34.9 40.3 87 ----- ----- Basin wide percent of average 71 71 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.8 25.4 66 17.9 25.3 71 BLACK BEAR 8170 25.5 36.1 71 31.7 48.2 66 CANYON 7870 5.2 6.8 76 14.1 19.1 74 FISHER CREEK 9100 25.7 36.3 71 29.6 44.3 67 MADISON PLATEAU 7750 14.7 19.1 77 25.1 32.2 78 NORTHEAST ENTRANCE 7350 .0 2.9 0 11.6 16.1 72 PARKER PEAK 9400 20.9 23.8 88 16.8 21.3 79 SYLVAN LAKE 8420 12.9 20.0 65 22.2 26.7 83 THUMB DIVIDE 7980 3.0 9.3 32 16.6 23.5 71 TWO OCEAN PLATEAU 9240 25.5 30.5 84 22.2 34.2 65 WHISKEY CREEK 6800 7.1 9.3 76 16.3 25.7 63 WHITE MILL 8700 18.4 24.4 75 20.4 33.2 61 WOLVERINE 7650 .0 2.8 0 9.5 16.8 57 ----- ----- Basin wide percent of average 71 69 WIND RIVER BURROUGHS CREEK 8750 11.2 10.1 111 13.2 21.0 63 COLD SPRINGS 9630 8.7 3.1 281 17.7 15.6 113 DEER PARK 9700 22.1 17.0 130 27.5 29.0 95 HOBBS PARK 10100 25.3 16.4 154 26.6 19.1 139 LITTLE WARM 9370 9.8 7.4 132 14.5 18.5 78 SOUTH PASS 9040 19.1 13.6 140 25.5 24.6 104 ST. LAWRENCE ALT 8620 9.1 3.4 268 19.1 13.8 138 TOGWOTEE PASS 9580 23.1 27.2 85 -M 30.9 * TOWNSEND CREEK 8700 15.7 5.4 291 24.1 17.3 139 ----- ----- Basin wide percent of average 139 106 BIGHORN BASIN BALD MTN. 9380 18.4 22.8 81 15.9 23.5 68 BEAR TRAP MEADOW 8200 4.4 .6 733 12.4 12.6 98 BLACKWATER 9780 22.6 28.8 78 21.7 26.8 81 BONE SPRINGS DIV 9350 14.7 16.0 92 15.3 20.4 75 EVENING STAR 9200 20.1 32.2 62 26.2 32.1 82 GRAVE SPRINGS 8550 11.4 7.3 156 16.8 14.7 114 KIRWIN 9550 12.7 10.8 118 15.7 15.9 99 MARQUETTE 8760 14.2 8.7 163 16.9 15.9 106 MIDDLE POWDER 7760 13.3 10.6 125 13.2 17.6 75 OWL CREEK 8975 2.8 2.1 133 11.3 9.6 118 POWDER RIVER PASS 9480 8.7 7.8 112 15.2 17.8 85 SHELL CREEK 9580 15.6 16.1 97 16.1 18.8 86 SYLVAN LAKE 8420 12.9 20.0 65 22.2 26.7 83 SYLVAN ROAD 7120 .0 2.5 0 15.8 21.9 72 TIMBER CREEK 7950 4.8 2.1 229 13.4 12.5 107 YOUNTS PEAK 8350 11.8 15.0 79 13.3 20.4 65 ----- ----- Basin wide percent of average 93 85 SHOSHONE RIVER BLACKWATER 9780 22.6 28.8 78 21.7 26.8 81 EVENING STAR 9200 20.1 32.2 62 26.2 32.1 82 KIRWIN 9550 12.7 10.8 118 15.7 15.9 99 MARQUETTE 8760 14.2 8.7 163 16.9 15.9 106 SYLVAN LAKE 8420 12.9 20.0 65 22.2 26.7 83 SYLVAN ROAD 7120 .0 2.5 0 15.8 21.9 72 YOUNTS PEAK 8350 11.8 15.0 79 13.3 20.4 65 ----- ----- Basin wide percent of average 80 83 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.4 .6 733 12.4 12.6 98 BIG GOOSE 7990 13.0 8.9 146 18.0 14.9 121 BONE SPRINGS DIV 9350 14.7 16.0 92 15.3 20.4 75 BURGESS JUNCTION 7880 14.1 9.7 145 16.6 17.1 97 CLOUD PEAK RESERVOIR 9860 19.4 14.6 133 19.6 19.5 101 DOME LAKE 8880 13.7 10.0 137 19.2 18.9 102 GRAVE SPRINGS 8550 11.4 7.3 156 16.8 14.7 114 HANSEN SAWMILL 8360 5.4 1.9 284 14.0 12.5 112 MIDDLE POWDER 7760 13.3 10.6 125 13.2 17.6 75 POWDER RIVER PASS 9480 8.7 7.8 112 15.2 17.8 85 SUCKER CREEK 8880 17.5 9.8 179 21.5 19.7 109 TIE CREEK 6870 6.3 1.2 525 18.5 15.5 119 ----- ----- Basin wide percent of average 144 100 BELLE FOURCHE BLIND PARK 6890 1.9 .0 * 18.3 16.0 114 COLE CANYON 5910 3.1 .7 443* 17.0 11.3 150 NORTH RAPID CREEK 6130 .0 .5 0* 16.9 12.8 132 ----- ----- Basin wide percent of average 417* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 17.3 12.4 140 29.4 30.8 95 DIVIDE PEAK 8880 19.3 12.2 158 29.8 26.0 115 ELK RIVER 8700 14.2 7.0 203 26.3 24.6 107 JOE WRIGHT 10120 25.7 23.6 109 30.4 32.6 93 NORTH FRENCH CREEK 10130 -M 32.9 * -M 32.2 * OLD BATTLE 10000 43.1 35.1 123 46.0 42.3 109 SAGE CREEK BASIN 7850 .9 7.1 13 16.1 15.1 107 SOUTH BRUSH CREEK 8440 11.0 6.2 177 25.4 22.0 115 TOWER 10500 43.5 51.3 85 43.3 47.9 90 WEBBER SPRINGS 9250 24.9 17.4 143 36.2 33.1 109 WILLOW CREEK PASS 9540 14.3 10.8 132 17.9 17.2 104 ----- ----- Basin wide percent of average 117 103 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.7 22.5 114 29.9 29.3 102 CASPER MTN. 7900 16.1 11.2 144 20.1 22.0 91 DEADMAN HILL 10220 -M 17.8 * -M 23.0 * DEER PARK 9700 22.1 17.0 130 27.5 29.0 95 LAPRELE CREEK 8375 6.3 3.4 185 18.6 18.4 101 RENO HILL 8400 18.0 9.2 196 25.8 22.7 114 ROACH 9700 22.6 13.0 174 29.0 24.5 118 SAND LAKE 10050 40.7 35.2 116 40.4 32.0 126 SOUTH PASS 9040 19.1 13.6 140 25.5 24.6 104 WINDY PEAK 7900 6.9 1.5 460 17.9 15.3 117 ----- ----- Basin wide percent of average 140 108 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .3 0* 19.0 19.9 95 DIVIDE PEAK 8880 19.3 12.2 158 29.8 26.0 115 OLD BATTLE 10000 43.1 35.1 123 46.0 42.3 109 SANDSTONE RS 8150 3.3 3.4 97 22.0 23.5 94 WHISKEY PARK 8950 28.0 26.0 108 39.5 36.1 109 ----- ----- Basin wide percent of average 122 106 UPPER GREEN RIVER BIG SANDY OPENING 9080 7.3 8.6 85 12.5 17.3 72 BLIND BULL SUM 8650 19.6 24.6 80 16.8 26.7 63 EAST RIM DIVIDE 7930 .2 8.8 2 9.2 15.0 61 ELKHART PARK G.S. 9400 7.3 9.1 80 11.6 17.5 66 GROS VENTRE SUMMIT 8750 7.5 9.6 78 12.0 16.5 73 GUNSIGHT PASS 9820 11.3 -M * 15.1 -M * KENDALL R.S. 7740 .1 3.2 3 10.9 17.6 62 LOOMIS PARK 8240 2.5 9.3 27 13.2 21.2 62 NEW FORK LAKE 8340 .2 3.5 6 9.0 14.6 62 POCKET CREEK 9360 9.2 -M * 14.4 -M * SNIDER BASIN 8060 6.9 7.2 96 15.8 19.5 81 SPRING CREEK DIVIDE 9000 22.8 24.2 94 23.6 31.7 74 TRIPLE PEAK 8500 16.9 16.5 102 27.2 30.4 89 ----- ----- Basin wide percent of average 73 71 LOWER GREEN RIVER HAMS FORK 7840 .3 .7 43* 13.8 15.9 87 HEWINTA 9519 8.2 4.1 200 17.6 19.1 92 HICKERSON PARK 9145 1.8 1.9 95 15.3 11.4 134 HOLE-IN-ROCK 9150 1.7 1.5 113 15.0 11.0 136 INDIAN CREEK 9425 20.6 23.3 88 22.4 31.1 72 KELLEY R.S. 8180 7.2 8.7 83 17.6 24.9 71 STEEL CREEK PARK 10200 21.1 17.9 118 22.1 21.7 102 ----- ----- Basin wide percent of average 105 92 UPPER BEAR RIVER BUG LAKE 7950 10.6 10.3 103 19.2 23.8 81 HAYDEN FORK 9212 6.0 6.9 87 23.9 26.9 89 KELLEY R.S. 8180 7.2 8.7 83 17.6 24.9 71 LILY LAKE 9156 10.9 6.0 182 20.0 22.7 88 MONTE CRISTO 8960 17.5 22.1 79 24.6 32.3 76 SALT RIVER SUMMIT 7760 4.2 4.4 95 15.8 22.9 69 TRIAL LAKE 9992 20.2 22.8 89 21.4 31.5 68 ----- ----- Basin wide percent of average 94 77 ----------------------------------------------------------------------------- -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.