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 THURSDAY: MAY 20 , 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 4.7 0 16.1 26.0 62 COTTONWOOD CREEK 7670 12.2 12.0 102 28.3 34.4 82 GRAND TARGHEE 9260 43.4 -M * 35.5 -M * GRANITE CREEK 6770 .0 6.3 0 16.0 23.9 67 GRASSY LAKE 7265 14.1 24.0 59 31.4 43.4 72 GROS VENTRE SUMMIT 8750 5.3 8.6 62 12.2 16.7 73 GUNSIGHT PASS 9820 10.6 -M * 15.2 -M * LEWIS LAKE DIVIDE 7850 14.2 26.8 53 26.3 43.9 60 PHILLIPS BENCH 8200 13.3 22.0 60 24.9 35.2 71 SALT RIVER SUMMIT 7760 1.8 3.0 60 16.4 23.1 71 SNAKE RIVER STATION 6920 .0 3.7 0 19.7 27.2 72 SPRING CREEK DIVIDE 9000 21.0 22.8 92 23.6 32.0 74 THUMB DIVIDE 7980 .2 8.0 3 16.6 23.7 70 TOGWOTEE PASS 9580 22.6 26.6 85 -M 31.3 * TWO OCEAN PLATEAU 9240 24.5 29.8 82 22.3 34.7 64 WILLOW CREEK 8380 18.9 23.1 82 35.9 40.8 88 ----- ----- Basin wide percent of average 67 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.9 24.8 68 18.2 25.7 71 BLACK BEAR 8170 22.7 34.9 65 31.7 48.6 65 CANYON 7870 2.9 5.6 52 14.4 19.3 75 FISHER CREEK 9100 24.3 35.4 69 29.7 44.8 66 MADISON PLATEAU 7750 12.6 17.5 72 25.4 32.6 78 NORTHEAST ENTRANCE 7350 .0 1.9 0 12.0 16.4 73 PARKER PEAK 9400 18.4 23.4 79 17.3 21.7 80 SYLVAN LAKE 8420 11.4 18.8 61 22.7 27.2 83 THUMB DIVIDE 7980 .2 8.0 3 16.6 23.7 70 TWO OCEAN PLATEAU 9240 24.5 29.8 82 22.3 34.7 64 WHISKEY CREEK 6800 4.5 7.7 58 16.2 26.0 62 WHITE MILL 8700 16.8 23.7 71 20.7 33.6 62 WOLVERINE 7650 .0 1.8 0 9.8 17.1 57 ----- ----- Basin wide percent of average 67 69 WIND RIVER BURROUGHS CREEK 8750 9.7 9.3 104 13.2 21.3 62 COLD SPRINGS 9630 7.8 2.6 300 18.4 15.9 116 DEER PARK 9700 21.9 16.6 132 28.0 29.4 95 HOBBS PARK 10100 25.9 15.8 164 27.5 19.5 141 LITTLE WARM 9370 8.9 6.3 141 14.5 18.8 77 SOUTH PASS 9040 18.4 12.1 152 25.9 24.9 104 ST. LAWRENCE ALT 8620 7.4 2.6 285 19.5 14.1 138 TOGWOTEE PASS 9580 22.6 26.6 85 -M 31.3 * TOWNSEND CREEK 8700 14.8 4.7 315 24.5 17.6 139 ----- ----- Basin wide percent of average 142 106 BIGHORN BASIN BALD MTN. 9380 17.7 22.3 79 16.0 23.9 67 BEAR TRAP MEADOW 8200 2.5 .2 1250* 12.9 12.9 100 BLACKWATER 9780 22.3 28.8 77 22.3 27.2 82 BONE SPRINGS DIV 9350 13.4 15.1 89 15.5 20.8 75 EVENING STAR 9200 18.7 31.7 59 26.4 32.5 81 GRAVE SPRINGS 8550 10.3 5.7 181 17.4 15.0 116 KIRWIN 9550 12.1 10.2 119 16.2 16.2 100 MARQUETTE 8760 13.6 8.1 168 17.7 16.3 109 MIDDLE POWDER 7760 11.4 9.1 125 13.6 17.9 76 OWL CREEK 8975 1.2 1.8 67 11.7 9.9 118 POWDER RIVER PASS 9480 7.1 6.8 104 15.3 18.1 85 SHELL CREEK 9580 14.5 15.4 94 16.2 19.1 85 SYLVAN LAKE 8420 11.4 18.8 61 22.7 27.2 83 SYLVAN ROAD 7120 .0 1.7 0 16.3 22.2 73 TIMBER CREEK 7950 3.3 1.8 183 14.1 12.9 109 YOUNTS PEAK 8350 10.0 13.9 72 13.3 20.7 64 ----- ----- Basin wide percent of average 89 86 SHOSHONE RIVER BLACKWATER 9780 22.3 28.8 77 22.3 27.2 82 EVENING STAR 9200 18.7 31.7 59 26.4 32.5 81 KIRWIN 9550 12.1 10.2 119 16.2 16.2 100 MARQUETTE 8760 13.6 8.1 168 17.7 16.3 109 SYLVAN LAKE 8420 11.4 18.8 61 22.7 27.2 83 SYLVAN ROAD 7120 .0 1.7 0 16.3 22.2 73 YOUNTS PEAK 8350 10.0 13.9 72 13.3 20.7 64 ----- ----- Basin wide percent of average 78 83 POWDER-TONGUE BEAR TRAP MEADOW 8200 2.5 .2 1250* 12.9 12.9 100 BIG GOOSE 7990 11.9 8.2 145 18.5 15.2 122 BONE SPRINGS DIV 9350 13.4 15.1 89 15.5 20.8 75 BURGESS JUNCTION 7880 12.8 8.6 149 16.7 17.4 96 CLOUD PEAK RESERVOIR 9860 18.4 13.9 132 19.9 20.0 100 DOME LAKE 8880 12.7 8.9 143 19.6 19.2 102 GRAVE SPRINGS 8550 10.3 5.7 181 17.4 15.0 116 HANSEN SAWMILL 8360 3.6 1.4 257 14.3 12.8 112 MIDDLE POWDER 7760 11.4 9.1 125 13.6 17.9 76 POWDER RIVER PASS 9480 7.1 6.8 104 15.3 18.1 85 SUCKER CREEK 8880 16.6 8.8 189 21.8 20.0 109 TIE CREEK 6870 4.5 .7 643 18.8 15.8 119 ----- ----- Basin wide percent of average 143 100 BELLE FOURCHE BLIND PARK 6890 .0 .0 100* 18.5 16.4 113 COLE CANYON 5910 .0 .3 0* 17.6 11.6 152 NORTH RAPID CREEK 6130 .0 .2 0* 17.1 13.0 132 ----- ----- Basin wide percent of average 0* 130 UPPER N. PLATTE RIVER COLUMBINE 9160 16.0 10.2 157 30.7 31.1 99 DIVIDE PEAK 8880 18.0 10.4 173 31.5 26.3 120 ELK RIVER 8700 11.6 5.5 211 27.2 24.9 109 JOE WRIGHT 10120 25.8 22.8 113 31.2 33.1 94 NORTH FRENCH CREEK 10130 -M 31.8 * -M 32.6 * OLD BATTLE 10000 43.2 33.8 128 46.9 42.7 110 SAGE CREEK BASIN 7850 .1 6.0 2 17.2 15.3 112 SOUTH BRUSH CREEK 8440 9.8 5.1 192 26.8 22.4 120 TOWER 10500 45.2 50.4 90 44.7 48.3 93 WEBBER SPRINGS 9250 23.7 15.3 155 36.6 33.4 110 WILLOW CREEK PASS 9540 14.1 9.4 150 18.3 17.5 105 ----- ----- Basin wide percent of average 123 105 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.1 20.7 121 30.1 29.7 101 CASPER MTN. 7900 13.2 9.7 136 21.2 22.4 95 DEADMAN HILL 10220 -M 16.8 * -M 23.3 * DEER PARK 9700 21.9 16.6 132 28.0 29.4 95 LAPRELE CREEK 8375 3.8 2.7 141 19.3 18.7 103 RENO HILL 8400 17.0 8.0 213 26.7 23.1 116 ROACH 9700 22.4 11.6 193 29.8 24.9 120 SAND LAKE 10050 41.0 34.1 120 40.8 32.5 126 SOUTH PASS 9040 18.4 12.1 152 25.9 24.9 104 WINDY PEAK 7900 4.6 1.1 418 18.7 15.7 119 ----- ----- Basin wide percent of average 144 109 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 20.2 20.1 100 DIVIDE PEAK 8880 18.0 10.4 173 31.5 26.3 120 OLD BATTLE 10000 43.2 33.8 128 46.9 42.7 110 SANDSTONE RS 8150 .0 2.5 0 23.1 23.7 97 WHISKEY PARK 8950 27.5 24.2 114 40.6 36.5 111 ----- ----- Basin wide percent of average 125 109 UPPER GREEN RIVER BIG SANDY OPENING 9080 -M 7.4 * 13.0 17.5 74 BLIND BULL SUM 8650 18.2 23.6 77 16.9 27.0 63 EAST RIM DIVIDE 7930 .2 7.6 3 9.4 15.2 62 ELKHART PARK G.S. 9400 5.3 8.1 65 11.8 17.8 66 GROS VENTRE SUMMIT 8750 5.3 8.6 62 12.2 16.7 73 GUNSIGHT PASS 9820 10.6 -M * 15.2 -M * KENDALL R.S. 7740 .1 1.6 6 11.3 17.8 63 LOOMIS PARK 8240 .2 8.1 2 13.2 21.5 61 NEW FORK LAKE 8340 .0 2.3 0 9.1 14.9 61 POCKET CREEK 9360 7.5 -M * 14.5 -M * SNIDER BASIN 8060 4.1 5.9 69 15.7 19.7 80 SPRING CREEK DIVIDE 9000 21.0 22.8 92 23.6 32.0 74 TRIPLE PEAK 8500 14.9 14.5 103 27.2 30.7 89 ----- ----- Basin wide percent of average 67 71 LOWER GREEN RIVER HAMS FORK 7840 .3 .0 * 14.1 16.1 88 HEWINTA 9519 6.8 3.2 213 17.8 19.4 92 HICKERSON PARK 9145 .0 1.2 0 15.3 11.7 131 HOLE-IN-ROCK 9150 .0 1.0 0 15.1 11.2 135 INDIAN CREEK 9425 19.2 21.9 88 22.6 31.4 72 KELLEY R.S. 8180 5.5 7.4 74 17.6 25.2 70 STEEL CREEK PARK 10200 21.1 17.1 123 22.3 22.0 101 ----- ----- Basin wide percent of average 102 91 UPPER BEAR RIVER BUG LAKE 7950 8.3 8.6 97 19.3 24.1 80 HAYDEN FORK 9212 4.1 5.7 72 24.3 27.2 89 KELLEY R.S. 8180 5.5 7.4 74 17.6 25.2 70 LILY LAKE 9156 9.9 5.0 198 20.4 22.9 89 MONTE CRISTO 8960 16.7 20.5 81 25.1 32.7 77 SALT RIVER SUMMIT 7760 1.8 3.0 60 16.4 23.1 71 TRIAL LAKE 9992 19.5 21.5 91 22.0 31.8 69 ----- ----- Basin wide percent of average 92 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.