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 TUESDAY: MAY 18 , 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 5.6 0 15.9 25.8 62 COTTONWOOD CREEK 7670 13.1 13.0 101 27.6 34.1 81 GRAND TARGHEE 9260 44.4 -M * 35.1 -M * GRANITE CREEK 6770 .0 7.1 0 15.7 23.7 66 GRASSY LAKE 7265 15.4 25.3 61 31.0 43.1 72 GROS VENTRE SUMMIT 8750 6.2 9.2 67 11.9 16.5 72 GUNSIGHT PASS 9820 11.1 -M * 15.1 -M * LEWIS LAKE DIVIDE 7850 16.1 27.9 58 26.3 43.7 60 PHILLIPS BENCH 8200 14.6 23.1 63 25.0 35.0 71 SALT RIVER SUMMIT 7760 3.2 3.9 82 15.8 23.0 69 SNAKE RIVER STATION 6920 .0 4.7 0 19.3 27.1 71 SPRING CREEK DIVIDE 9000 22.2 23.8 93 23.6 31.8 74 THUMB DIVIDE 7980 1.4 8.8 16 16.7 23.6 71 TOGWOTEE PASS 9580 22.7 27.0 84 -M 31.0 * TWO OCEAN PLATEAU 9240 25.1 30.3 83 22.3 34.4 65 WILLOW CREEK 8380 19.4 24.2 80 34.9 40.5 86 ----- ----- Basin wide percent of average 68 71 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.5 25.2 65 18.0 25.4 71 BLACK BEAR 8170 24.2 35.8 68 31.7 48.3 66 CANYON 7870 4.3 6.3 68 14.1 19.2 73 FISHER CREEK 9100 25.1 36.0 70 29.6 44.4 67 MADISON PLATEAU 7750 14.0 18.6 75 25.1 32.4 77 NORTHEAST ENTRANCE 7350 .0 2.6 0 11.6 16.2 72 PARKER PEAK 9400 19.3 23.7 81 16.9 21.5 79 SYLVAN LAKE 8420 12.0 19.6 61 22.1 26.9 82 THUMB DIVIDE 7980 1.4 8.8 16 16.7 23.6 71 TWO OCEAN PLATEAU 9240 25.1 30.3 83 22.3 34.4 65 WHISKEY CREEK 6800 6.3 8.7 72 16.2 25.8 63 WHITE MILL 8700 17.7 24.2 73 20.5 33.3 62 WOLVERINE 7650 .0 2.4 0 9.6 16.9 57 ----- ----- Basin wide percent of average 68 69 WIND RIVER BURROUGHS CREEK 8750 10.7 9.9 108 13.2 21.1 63 COLD SPRINGS 9630 8.4 2.9 290 17.7 15.7 113 DEER PARK 9700 21.9 16.7 131 27.5 29.1 95 HOBBS PARK 10100 25.1 16.3 154 26.6 19.2 139 LITTLE WARM 9370 9.4 7.1 132 14.5 18.6 78 SOUTH PASS 9040 18.8 13.0 145 25.6 24.7 104 ST. LAWRENCE ALT 8620 8.5 3.1 274 19.2 13.9 138 TOGWOTEE PASS 9580 22.7 27.0 84 -M 31.0 * TOWNSEND CREEK 8700 15.3 5.2 294 24.1 17.4 139 ----- ----- Basin wide percent of average 139 105 BIGHORN BASIN BALD MTN. 9380 18.0 22.7 79 16.0 23.6 68 BEAR TRAP MEADOW 8200 3.8 .4 950* 12.4 12.7 98 BLACKWATER 9780 22.3 28.7 78 21.8 26.9 81 BONE SPRINGS DIV 9350 14.2 15.7 90 15.4 20.5 75 EVENING STAR 9200 19.4 32.0 61 26.3 32.3 81 GRAVE SPRINGS 8550 11.0 6.7 164 16.8 14.8 114 KIRWIN 9550 12.3 10.6 116 15.7 16.0 98 MARQUETTE 8760 13.9 8.4 165 16.8 16.0 105 MIDDLE POWDER 7760 12.6 10.1 125 13.2 17.7 75 OWL CREEK 8975 2.1 2.0 105 11.3 9.7 116 POWDER RIVER PASS 9480 8.3 7.4 112 15.2 17.9 85 SHELL CREEK 9580 15.0 16.0 94 16.1 18.9 85 SYLVAN LAKE 8420 12.0 19.6 61 22.1 26.9 82 SYLVAN ROAD 7120 .0 2.3 0 15.8 22.0 72 TIMBER CREEK 7950 4.2 2.0 210 13.3 12.6 106 YOUNTS PEAK 8350 11.1 14.6 76 13.3 20.5 65 ----- ----- Basin wide percent of average 90 85 SHOSHONE RIVER BLACKWATER 9780 22.3 28.7 78 21.8 26.9 81 EVENING STAR 9200 19.4 32.0 61 26.3 32.3 81 KIRWIN 9550 12.3 10.6 116 15.7 16.0 98 MARQUETTE 8760 13.9 8.4 165 16.8 16.0 105 SYLVAN LAKE 8420 12.0 19.6 61 22.1 26.9 82 SYLVAN ROAD 7120 .0 2.3 0 15.8 22.0 72 YOUNTS PEAK 8350 11.1 14.6 76 13.3 20.5 65 ----- ----- Basin wide percent of average 78 82 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.8 .4 950* 12.4 12.7 98 BIG GOOSE 7990 12.6 8.7 145 18.2 15.0 121 BONE SPRINGS DIV 9350 14.2 15.7 90 15.4 20.5 75 BURGESS JUNCTION 7880 13.6 9.3 146 16.6 17.2 97 CLOUD PEAK RESERVOIR 9860 19.0 14.3 133 19.7 19.7 100 DOME LAKE 8880 13.3 9.6 139 19.2 19.0 101 GRAVE SPRINGS 8550 11.0 6.7 164 16.8 14.8 114 HANSEN SAWMILL 8360 4.7 1.8 261 14.0 12.6 111 MIDDLE POWDER 7760 12.6 10.1 125 13.2 17.7 75 POWDER RIVER PASS 9480 8.3 7.4 112 15.2 17.9 85 SUCKER CREEK 8880 17.1 9.4 182 21.5 19.8 109 TIE CREEK 6870 5.7 1.2 475 18.6 15.6 119 ----- ----- Basin wide percent of average 144 99 BELLE FOURCHE BLIND PARK 6890 .0 .0 100* 18.3 16.2 113 COLE CANYON 5910 2.5 .5 500* 17.1 11.4 150 NORTH RAPID CREEK 6130 .0 .4 0* 17.0 12.9 132 ----- ----- Basin wide percent of average 278* 129 UPPER N. PLATTE RIVER COLUMBINE 9160 16.2 11.7 138 29.6 30.9 96 DIVIDE PEAK 8880 18.0 11.6 155 29.8 26.1 114 ELK RIVER 8700 12.4 6.5 191 26.3 24.7 106 JOE WRIGHT 10120 25.4 23.4 109 30.4 32.8 93 NORTH FRENCH CREEK 10130 -M 32.6 * -M 32.3 * OLD BATTLE 10000 43.2 34.7 124 46.0 42.4 108 SAGE CREEK BASIN 7850 .3 6.7 4 16.1 15.1 107 SOUTH BRUSH CREEK 8440 9.8 5.8 169 25.4 22.1 115 TOWER 10500 43.4 51.0 85 43.4 48.0 90 WEBBER SPRINGS 9250 24.6 16.7 147 36.2 33.2 109 WILLOW CREEK PASS 9540 14.1 10.4 136 18.0 17.3 104 ----- ----- Basin wide percent of average 116 103 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.3 21.9 116 29.8 29.4 101 CASPER MTN. 7900 15.2 10.7 142 20.1 22.1 91 DEADMAN HILL 10220 -M 17.5 * -M 23.1 * DEER PARK 9700 21.9 16.7 131 27.5 29.1 95 LAPRELE CREEK 8375 5.5 3.1 177 18.7 18.5 101 RENO HILL 8400 17.7 8.8 201 25.9 22.8 114 ROACH 9700 22.3 12.5 178 29.0 24.6 118 SAND LAKE 10050 40.7 34.9 117 40.5 32.2 126 SOUTH PASS 9040 18.8 13.0 145 25.6 24.7 104 WINDY PEAK 7900 5.9 1.4 421 18.1 15.4 118 ----- ----- Basin wide percent of average 141 107 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 19.0 19.9 95 DIVIDE PEAK 8880 18.0 11.6 155 29.8 26.1 114 OLD BATTLE 10000 43.2 34.7 124 46.0 42.4 108 SANDSTONE RS 8150 1.4 3.1 45 22.0 23.6 93 WHISKEY PARK 8950 27.2 25.4 107 39.5 36.2 109 ----- ----- Basin wide percent of average 120 105 UPPER GREEN RIVER BIG SANDY OPENING 9080 -M 8.2 * 12.5 17.4 72 BLIND BULL SUM 8650 19.0 24.3 78 16.8 26.8 63 EAST RIM DIVIDE 7930 .2 8.4 2 9.2 15.0 61 ELKHART PARK G.S. 9400 6.5 8.8 74 11.6 17.6 66 GROS VENTRE SUMMIT 8750 6.2 9.2 67 11.9 16.5 72 GUNSIGHT PASS 9820 11.1 -M * 15.1 -M * KENDALL R.S. 7740 .1 2.7 4 10.8 17.7 61 LOOMIS PARK 8240 1.5 8.9 17 13.1 21.3 62 NEW FORK LAKE 8340 .1 3.1 3 9.5 14.7 65 POCKET CREEK 9360 8.7 -M * 14.5 -M * SNIDER BASIN 8060 6.1 6.8 90 15.7 19.6 80 SPRING CREEK DIVIDE 9000 22.2 23.8 93 23.6 31.8 74 TRIPLE PEAK 8500 16.2 15.8 103 27.2 30.5 89 ----- ----- Basin wide percent of average 70 71 LOWER GREEN RIVER HAMS FORK 7840 .3 .4 75* 13.9 16.0 87 HEWINTA 9519 7.1 3.8 187 17.7 19.2 92 HICKERSON PARK 9145 1.0 1.6 63 15.3 11.5 133 HOLE-IN-ROCK 9150 1.1 1.4 79 15.1 11.1 136 INDIAN CREEK 9425 20.0 22.9 87 22.4 31.2 72 KELLEY R.S. 8180 6.4 8.2 78 17.6 25.0 70 STEEL CREEK PARK 10200 21.0 17.6 119 22.0 21.8 101 ----- ----- Basin wide percent of average 102 91 UPPER BEAR RIVER BUG LAKE 7950 9.8 9.7 101 19.2 23.9 80 HAYDEN FORK 9212 4.6 6.5 71 23.8 27.0 88 KELLEY R.S. 8180 6.4 8.2 78 17.6 25.0 70 LILY LAKE 9156 10.1 5.6 180 20.0 22.8 88 MONTE CRISTO 8960 17.0 21.6 79 24.5 32.5 75 SALT RIVER SUMMIT 7760 3.2 3.9 82 15.8 23.0 69 TRIAL LAKE 9992 19.6 22.4 88 21.5 31.6 68 ----- ----- Basin wide percent of average 91 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.