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 SUNDAY: MAY 9 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 4.2 9.6 44 16.0 25.0 64 COTTONWOOD CREEK 7670 15.4 17.1 90 26.6 32.9 81 GRAND TARGHEE 9260 44.6 -M * 34.8 -M * GRANITE CREEK 6770 4.5 10.5 43 15.0 23.0 65 GRASSY LAKE 7265 20.7 30.3 68 31.0 41.9 74 GROS VENTRE SUMMIT 8750 8.8 11.8 75 11.4 15.8 72 GUNSIGHT PASS 9820 10.9 -M * 13.9 -M * LEWIS LAKE DIVIDE 7850 18.8 32.2 58 26.3 42.6 62 PHILLIPS BENCH 8200 18.8 27.2 69 24.7 34.0 73 SALT RIVER SUMMIT 7760 7.2 8.0 90 15.1 22.2 68 SNAKE RIVER STATION 6920 1.3 9.1 14 19.5 26.2 74 SPRING CREEK DIVIDE 9000 21.4 27.2 79 21.7 30.9 70 THUMB DIVIDE 7980 7.9 12.5 63 16.6 22.7 73 TOGWOTEE PASS 9580 22.9 28.1 81 20.7 29.9 69 TWO OCEAN PLATEAU 9240 26.5 31.5 84 22.1 33.1 67 WILLOW CREEK 8380 22.0 28.5 77 33.8 39.0 87 ----- ----- Basin wide percent of average 71 72 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.6 25.9 68 17.5 24.4 72 BLACK BEAR 8170 28.2 38.5 73 31.4 47.0 67 CANYON 7870 7.8 9.1 86 14.1 18.3 77 FISHER CREEK 9100 27.0 37.7 72 29.0 43.0 67 MADISON PLATEAU 7750 17.1 22.2 77 24.8 31.2 79 NORTHEAST ENTRANCE 7350 1.6 5.4 30 11.5 15.4 75 PARKER PEAK 9400 21.7 24.5 89 16.6 20.4 81 SYLVAN LAKE 8420 13.9 22.3 62 21.7 25.7 84 THUMB DIVIDE 7980 7.9 12.5 63 16.6 22.7 73 TWO OCEAN PLATEAU 9240 26.5 31.5 84 22.1 33.1 67 WHISKEY CREEK 6800 9.7 12.7 76 16.3 24.9 65 WHITE MILL 8700 19.6 25.9 76 20.2 32.2 63 WOLVERINE 7650 .5 5.4 9 9.4 15.9 59 ----- ----- Basin wide percent of average 73 71 WIND RIVER BURROUGHS CREEK 8750 10.3 11.8 87 -M 20.1 * COLD SPRINGS 9630 5.7 4.4 130 13.9 14.8 94 DEER PARK 9700 19.0 16.5 115 23.8 27.8 86 HOBBS PARK 10100 20.8 17.4 120 21.8 18.0 121 LITTLE WARM 9370 8.4 9.3 90 12.2 17.7 69 SOUTH PASS 9040 15.7 16.3 96 21.2 23.7 89 ST. LAWRENCE ALT 8620 5.7 5.1 112 14.8 12.9 115 TOGWOTEE PASS 9580 22.9 28.1 81 20.7 29.9 69 TOWNSEND CREEK 8700 11.8 7.4 159 19.3 16.4 118 ----- ----- Basin wide percent of average 103 92 BIGHORN BASIN BALD MTN. 9380 17.3 23.5 74 14.7 22.4 66 BEAR TRAP MEADOW 8200 4.3 1.6 269 11.1 11.7 95 BLACKWATER 9780 21.7 28.7 76 20.6 25.7 80 BONE SPRINGS DIV 9350 14.0 17.4 80 14.3 19.3 74 EVENING STAR 9200 21.2 33.3 64 25.5 31.0 82 GRAVE SPRINGS 8550 10.4 9.6 108 14.3 14.0 102 KIRWIN 9550 11.3 12.4 91 13.5 15.0 90 MARQUETTE 8760 8.7 10.2 85 12.6 14.8 85 MIDDLE POWDER 7760 12.7 12.8 99 11.9 16.7 71 OWL CREEK 8975 .9 3.3 27 8.2 8.9 92 POWDER RIVER PASS 9480 9.1 9.4 97 14.6 16.7 87 SHELL CREEK 9580 16.0 16.9 95 15.5 17.8 87 SYLVAN LAKE 8420 13.9 22.3 62 21.7 25.7 84 SYLVAN ROAD 7120 .8 5.6 14 15.6 21.2 74 TIMBER CREEK 7950 1.8 3.6 50 9.5 11.5 83 YOUNTS PEAK 8350 12.3 17.2 72 12.5 19.5 64 ----- ----- Basin wide percent of average 77 81 SHOSHONE RIVER BLACKWATER 9780 21.7 28.7 76 20.6 25.7 80 EVENING STAR 9200 21.2 33.3 64 25.5 31.0 82 KIRWIN 9550 11.3 12.4 91 13.5 15.0 90 MARQUETTE 8760 8.7 10.2 85 12.6 14.8 85 SYLVAN LAKE 8420 13.9 22.3 62 21.7 25.7 84 SYLVAN ROAD 7120 .8 5.6 14 15.6 21.2 74 YOUNTS PEAK 8350 12.3 17.2 72 12.5 19.5 64 ----- ----- Basin wide percent of average 69 80 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.3 1.6 269 11.1 11.7 95 BIG GOOSE 7990 10.1 10.4 97 14.4 13.9 104 BONE SPRINGS DIV 9350 14.0 17.4 80 14.3 19.3 74 BURGESS JUNCTION 7880 13.2 12.0 110 14.9 16.3 91 CLOUD PEAK RESERVOIR 9860 16.4 15.6 105 16.1 18.3 88 DOME LAKE 8880 11.1 12.0 93 16.2 17.8 91 GRAVE SPRINGS 8550 10.4 9.6 108 14.3 14.0 102 HANSEN SAWMILL 8360 2.8 3.7 76 10.7 11.7 91 MIDDLE POWDER 7760 12.7 12.8 99 11.9 16.7 71 POWDER RIVER PASS 9480 9.1 9.4 97 14.6 16.7 87 SUCKER CREEK 8880 14.5 11.7 124 18.5 18.5 100 TIE CREEK 6870 2.6 2.6 100 14.3 14.5 99 ----- ----- Basin wide percent of average 102 90 BELLE FOURCHE BLIND PARK 6890 2.0 2.3 87 16.0 15.0 107 COLE CANYON 5910 2.5 2.2 114 14.2 10.4 137 NORTH RAPID CREEK 6130 .3 1.7 18 14.7 12.1 121 ----- ----- Basin wide percent of average 77 120 UPPER N. PLATTE RIVER COLUMBINE 9160 18.0 17.5 103 27.2 30.0 91 DIVIDE PEAK 8880 21.6 16.5 131 28.6 25.1 114 ELK RIVER 8700 14.7 11.4 129 24.4 23.8 103 JOE WRIGHT 10120 23.5 24.9 94 27.9 31.3 89 NORTH FRENCH CREEK 10130 42.6 34.4 124 42.3 30.9 137 OLD BATTLE 10000 40.9 37.1 110 43.5 41.1 106 SAGE CREEK BASIN 7850 7.6 9.6 79 15.7 14.6 108 SOUTH BRUSH CREEK 8440 13.0 9.0 144 24.4 21.1 116 TOWER 10500 40.9 52.4 78 40.1 46.6 86 WEBBER SPRINGS 9250 24.0 22.3 108 34.0 32.1 106 WILLOW CREEK PASS 9540 12.5 13.3 94 15.6 16.4 95 ----- ----- Basin wide percent of average 104 103 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.0 26.5 94 27.9 28.1 99 CASPER MTN. 7900 15.6 15.0 104 18.5 20.7 89 DEADMAN HILL 10220 -M 19.4 * -M 22.0 * DEER PARK 9700 19.0 16.5 115 23.8 27.8 86 LAPRELE CREEK 8375 7.0 5.3 132 17.2 17.4 99 RENO HILL 8400 17.2 12.5 138 23.7 21.4 111 ROACH 9700 21.3 16.5 129 26.9 23.4 115 SAND LAKE 10050 38.8 36.8 105 38.6 30.6 126 SOUTH PASS 9040 15.7 16.3 96 21.2 23.7 89 WINDY PEAK 7900 7.8 3.2 244 16.3 14.4 113 ----- ----- Basin wide percent of average 113 103 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 2.6 0 18.3 19.2 95 DIVIDE PEAK 8880 21.6 16.5 131 28.6 25.1 114 OLD BATTLE 10000 40.9 37.1 110 43.5 41.1 106 SANDSTONE RS 8150 8.7 6.6 132 21.2 22.7 93 WHISKEY PARK 8950 27.4 29.2 94 37.0 35.0 106 ----- ----- Basin wide percent of average 107 104 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.0 11.5 78 12.1 16.6 73 BLIND BULL SUM 8650 20.6 26.7 77 15.6 25.9 60 EAST RIM DIVIDE 7930 .3 11.5 3 8.8 14.4 61 ELKHART PARK G.S. 9400 7.7 11.4 68 11.2 16.7 67 GROS VENTRE SUMMIT 8750 8.8 11.8 75 11.4 15.8 72 GUNSIGHT PASS 9820 10.9 -M * 13.9 -M * KENDALL R.S. 7740 .2 7.1 3 10.3 17.0 61 LOOMIS PARK 8240 4.9 12.2 40 12.8 20.5 62 NEW FORK LAKE 8340 1.6 6.3 25 8.3 14.0 59 POCKET CREEK 9360 8.3 -M * 13.7 -M * SNIDER BASIN 8060 6.5 10.5 62 13.7 19.0 72 SPRING CREEK DIVIDE 9000 21.4 27.2 79 21.7 30.9 70 TRIPLE PEAK 8500 16.3 20.9 78 24.6 29.5 83 ----- ----- Basin wide percent of average 62 68 LOWER GREEN RIVER HAMS FORK 7840 .4 3.6 11 11.9 15.4 77 HEWINTA 9519 7.7 6.9 112 16.0 18.5 86 HICKERSON PARK 9145 2.2 3.9 56 13.4 10.8 124 HOLE-IN-ROCK 9150 .6 3.2 19 12.6 10.3 122 INDIAN CREEK 9425 19.9 26.4 75 20.2 30.2 67 KELLEY R.S. 8180 9.1 11.8 77 16.8 24.2 69 STEEL CREEK PARK 10200 19.0 18.9 101 20.0 21.0 95 ----- ----- Basin wide percent of average 79 85 UPPER BEAR RIVER BUG LAKE 7950 11.3 14.7 77 17.5 23.1 76 HAYDEN FORK 9212 7.0 10.3 68 22.2 26.0 85 KELLEY R.S. 8180 9.1 11.8 77 16.8 24.2 69 LILY LAKE 9156 10.2 8.8 116 18.2 21.9 83 MONTE CRISTO 8960 16.9 25.9 65 22.2 31.3 71 SALT RIVER SUMMIT 7760 7.2 8.0 90 15.1 22.2 68 TRIAL LAKE 9992 20.0 25.4 79 19.8 30.4 65 ----- ----- Basin wide percent of average 78 74 ----------------------------------------------------------------------------- -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.