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 WEDNESDAY: MAY 27 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 1.4 0 24.3 26.6 91 COTTONWOOD CREEK 7670 7.7 8.3 93 39.0 35.2 111 GRAND TARGHEE 9260 42.8 -M * 43.0 -M * GRANITE CREEK 6770 .1 3.4 3 27.3 24.4 112 GRASSY LAKE 7265 9.3 19.0 49 42.8 44.3 97 GROS VENTRE SUMMIT 8750 .4 6.0 7 19.1 17.2 111 GUNSIGHT PASS 9820 10.6 -M * 21.0 -M * LEWIS LAKE DIVIDE 7850 19.6 22.3 88 42.5 44.7 95 PHILLIPS BENCH 8200 15.8 17.8 89 36.5 36.0 101 SALT RIVER SUMMIT 7760 .1 .0 21.0 23.7 89 SNAKE RIVER STATION 6920 .0 .0 100 29.0 27.9 104 SPRING CREEK DIVIDE 9000 19.2 18.9 102 33.4 32.6 102 THUMB DIVIDE 7980 .1 4.8 2 27.7 24.3 114 TOGWOTEE PASS 9580 25.3 24.4 104 36.5 32.1 114 TWO OCEAN PLATEAU 9240 37.8 27.7 136 37.8 35.6 106 WILLOW CREEK 8380 16.6 18.6 89 49.9 41.8 119 ----- ----- Basin wide percent of average 88 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 22.5 22.9 98 27.5 26.4 104 BLACK BEAR 8170 31.0 30.9 100 45.6 49.5 92 CANYON 7870 .7 3.1 23 20.4 20.0 102 FISHER CREEK 9100 33.4 32.7 102 45.5 45.8 99 MADISON PLATEAU 7750 13.5 13.0 104 32.3 33.5 96 NORTHEAST ENTRANCE 7350 .0 .8 0 18.2 17.0 107 PARKER PEAK 9400 18.4 21.1 87 24.5 22.5 109 SYLVAN LAKE 8420 10.5 15.0 70 30.4 28.1 108 THUMB DIVIDE 7980 .1 4.8 2 27.7 24.3 114 TWO OCEAN PLATEAU 9240 37.8 27.7 136 37.8 35.6 106 WHISKEY CREEK 6800 5.1 3.9 131 26.5 26.7 99 WHITE MILL 8700 21.4 20.9 102 31.7 34.5 92 WOLVERINE 7650 .0 .4 0 17.2 17.8 97 ----- ----- Basin wide percent of average 99 101 WIND RIVER BURROUGHS CREEK 8750 8.3 6.0 138 22.1 22.0 100 COLD SPRINGS 9630 .0 1.2 0 16.2 16.5 98 DEER PARK 9700 6.1 12.7 48 24.3 30.3 80 HOBBS PARK 10100 9.8 12.8 77 22.0 20.3 108 LITTLE WARM 9370 .0 3.5 0 20.0 19.5 103 SOUTH PASS 9040 .9 8.8 10 21.2 25.5 83 ST. LAWRENCE ALT 8620 .0 1.0 0 15.1 14.7 103 TOGWOTEE PASS 9580 25.3 24.4 104 36.5 32.1 114 TOWNSEND CREEK 8700 .0 2.6 0 18.3 18.3 100 ----- ----- Basin wide percent of average 69 98 BIGHORN BASIN BALD MTN. 9380 14.1 19.5 72 20.1 24.7 81 BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.6 96 BLACKWATER 9780 26.4 27.3 97 30.9 28.1 110 BONE SPRINGS DIV 9350 8.6 11.8 73 19.1 21.6 88 EVENING STAR 9200 24.3 29.1 84 40.2 33.5 120 GRAVE SPRINGS 8550 .0 2.8 0 13.2 15.6 85 KIRWIN 9550 4.5 7.8 58 20.0 16.9 118 MARQUETTE 8760 .0 6.0 0 14.0 17.2 81 MIDDLE POWDER 7760 .0 5.5 0 14.4 18.6 77 OWL CREEK 8975 .0 1.0 0 11.1 10.6 105 POWDER RIVER PASS 9480 3.6 3.9 92 19.8 18.9 105 SHELL CREEK 9580 12.5 13.1 95 20.6 19.9 104 SYLVAN LAKE 8420 10.5 15.0 70 30.4 28.1 108 SYLVAN ROAD 7120 .0 .3 0 25.4 22.8 111 TIMBER CREEK 7950 .0 1.1 0 13.4 13.7 98 YOUNTS PEAK 8350 10.5 10.3 102 20.9 21.5 97 ----- ----- Basin wide percent of average 74 100 SHOSHONE RIVER BLACKWATER 9780 26.4 27.3 97 30.9 28.1 110 EVENING STAR 9200 24.3 29.1 84 40.2 33.5 120 KIRWIN 9550 4.5 7.8 58 20.0 16.9 118 MARQUETTE 8760 .0 6.0 0 14.0 17.2 81 SYLVAN LAKE 8420 10.5 15.0 70 30.4 28.1 108 SYLVAN ROAD 7120 .0 .3 0 25.4 22.8 111 YOUNTS PEAK 8350 10.5 10.3 102 20.9 21.5 97 ----- ----- Basin wide percent of average 80 108 POWDER-TONGUE BEAR TRAP MEADOW 8200 .0 .1 0 13.0 13.6 96 BIG GOOSE 7990 .0 5.8 0 16.9 15.9 106 BONE SPRINGS DIV 9350 8.6 11.8 73 19.1 21.6 88 BURGESS JUNCTION 7880 2.6 5.5 47 16.3 18.0 91 CLOUD PEAK RESERVOIR 9860 11.0 10.9 101 22.0 20.9 105 DOME LAKE 8880 .0 5.3 0 20.4 20.0 102 GRAVE SPRINGS 8550 .0 2.8 0 13.2 15.6 85 HANSEN SAWMILL 8360 .0 .6 0 13.4 13.5 99 MIDDLE POWDER 7760 .0 5.5 0 14.4 18.6 77 POWDER RIVER PASS 9480 3.6 3.9 92 19.8 18.9 105 SUCKER CREEK 8880 5.3 6.0 88 22.1 20.9 106 TIE CREEK 6870 .0 .0 100 18.0 16.6 108 ----- ----- Basin wide percent of average 53 97 BELLE FOURCHE BLIND PARK 6890 .0 .0 100 19.0 17.2 110 COLE CANYON 5910 .0 .0 100 15.6 12.3 127 NORTH RAPID CREEK 6130 .0 .0 100 18.2 13.6 134 ----- ----- Basin wide percent of average * 123 UPPER N. PLATTE RIVER COLUMBINE 9160 .0 5.2 0 33.5 31.8 105 DIVIDE PEAK 8880 .6 6.5 9 34.4 27.0 127 ELK RIVER 8700 .1 2.7 4 26.8 25.5 105 JOE WRIGHT 10120 14.9 20.2 74 35.9 34.1 105 NORTH FRENCH CREEK 10130 26.0 28.1 93 40.4 33.6 120 OLD BATTLE 10000 32.3 29.9 108 48.7 43.6 112 SAGE CREEK BASIN 7850 .0 3.8 0 20.1 15.6 129 SOUTH BRUSH CREEK 8440 .0 3.0 0 23.3 23.1 101 TOWER 10500 35.0 47.1 74 51.4 49.3 104 WEBBER SPRINGS 9250 5.4 10.4 52 36.9 34.1 108 WILLOW CREEK PASS 9540 .0 5.9 0 18.0 18.2 99 ----- ----- Basin wide percent of average 70 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 9.9 15.9 62 28.6 30.5 94 CASPER MTN. 7900 .0 6.4 0 20.1 23.3 86 DEADMAN HILL 10220 12.0 14.1 85 24.4 24.1 101 DEER PARK 9700 6.1 12.7 48 24.3 30.3 80 LAPRELE CREEK 8375 -M 1.5 * 17.2 19.5 88 RENO HILL 8400 .1 5.2 2 22.4 24.1 93 ROACH 9700 1.5 8.4 18 25.8 25.8 100 SAND LAKE 10050 29.6 30.3 98 38.0 33.5 113 SOUTH PASS 9040 .9 8.8 10 21.2 25.5 83 WINDY PEAK 7900 .5 .4 125 15.8 16.4 96 ----- ----- Basin wide percent of average 59 94 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 23.6 20.6 115 DIVIDE PEAK 8880 .6 6.5 9 34.4 27.0 127 OLD BATTLE 10000 32.3 29.9 108 48.7 43.6 112 SANDSTONE RS 8150 .1 .9 11 26.2 24.3 108 WHISKEY PARK 8950 2.7 18.8 14 42.0 37.2 113 ----- ----- Basin wide percent of average 64 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 .0 4.3 0 18.5 18.1 102 BLIND BULL SUM 8650 25.1 20.8 121 26.3 27.6 95 EAST RIM DIVIDE 7930 .0 4.4 0 15.4 15.7 98 ELKHART PARK G.S. 9400 .5 5.6 9 19.3 18.5 104 GROS VENTRE SUMMIT 8750 .4 6.0 7 19.1 17.2 111 GUNSIGHT PASS 9820 10.6 -M * 21.0 -M * KENDALL R.S. 7740 .1 .0 17.4 18.2 96 LOOMIS PARK 8240 .1 5.1 2 22.6 22.1 102 NEW FORK LAKE 8340 .0 .0 100 14.9 15.4 97 SNIDER BASIN 8060 -M 2.5 * 18.4 20.1 92 SPRING CREEK DIVIDE 9000 19.2 18.9 102 33.4 32.6 102 TRIPLE PEAK 8500 6.2 9.5 65 34.0 31.4 108 ----- ----- Basin wide percent of average 69 101 LOWER GREEN RIVER HAMS FORK 7840 .2 .0 16.5 16.6 99 HEWINTA 9519 .0 1.4 0 17.7 19.9 89 HICKERSON PARK 9145 .0 .3 0 14.5 12.2 119 HOLE-IN-ROCK 9150 .0 .3 0 13.4 11.8 114 INDIAN CREEK 9425 -M 18.2 * 27.7 32.0 87 KELLEY R.S. 8180 .0 4.2 0 23.0 25.8 89 STEEL CREEK PARK 10200 7.3 14.5 50 21.7 22.7 96 ----- ----- Basin wide percent of average 35 95 UPPER BEAR RIVER BUG LAKE 7950 .2 5.0 4 22.6 24.7 91 HAYDEN FORK 9212 .1 3.0 3 27.7 27.9 99 KELLEY R.S. 8180 .0 4.2 0 23.0 25.8 89 LILY LAKE 9156 .0 2.8 0 21.8 23.6 92 MONTE CRISTO 8960 6.3 16.4 38 32.7 33.5 98 SALT RIVER SUMMIT 7760 .1 .0 21.0 23.7 89 TRIAL LAKE 9992 6.1 18.0 34 30.7 32.7 94 ----- ----- Basin wide percent of average 26 94 ----------------------------------------------------------------------------- -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 1961-90. 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.