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 SATURDAY: SEPTEMBER 20 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 .0 100 36.3 32.6 111 COTTONWOOD CREEK 7670 .0 .0 100 -M 42.1 * GRAND TARGHEE 9260 .0 -M * 51.5 -M * GRANITE CREEK 6770 .1 .0 33.9 30.1 113 GRASSY LAKE 7265 .1 .0 58.5 52.8 111 GROS VENTRE SUMMIT 8750 .1 .0 22.2 24.3 91 GUNSIGHT PASS 9820 .2 -M * 24.2 -M * LEWIS LAKE DIVIDE 7850 .0 .0 100 50.1 52.6 95 PHILLIPS BENCH 8200 .0 .0 100 47.3 43.1 110 SALT RIVER SUMMIT 7760 .0 .0 100 24.3 29.0 84 SNAKE RIVER STATION 6920 .0 .0 100 37.8 34.6 109 SPRING CREEK DIVIDE 9000 .0 .0 100 33.9 38.7 88 THUMB DIVIDE 7980 .3 .0 30.7 29.9 103 TOGWOTEE PASS 9580 .0 .0 100 43.6 39.8 110 TWO OCEAN PLATEAU 9240 .3 .0 46.6 44.2 105 WILLOW CREEK 8380 .5 .0 -M 50.7 * ----- ----- Basin wide percent of average * 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 .1 .2 50 37.0 34.5 107 BLACK BEAR 8170 .0 .1 0 58.4 58.8 99 CANYON 7870 .0 .0 100 30.4 27.0 113 FISHER CREEK 9100 .1 .2 50 56.2 57.3 98 MADISON PLATEAU 7750 .0 .1 0 45.1 41.4 109 NORTHEAST ENTRANCE 7350 .0 .0 100 23.3 25.3 92 PARKER PEAK 9400 .1 .2 50 42.6 30.2 141 SYLVAN LAKE 8420 .0 .1 0 42.3 36.5 116 THUMB DIVIDE 7980 .3 .0 30.7 29.9 103 TWO OCEAN PLATEAU 9240 .3 .0 46.6 44.2 105 WHISKEY CREEK 6800 .0 .0 100 36.8 34.6 106 WHITE MILL 8700 .1 .1 100 41.0 44.5 92 WOLVERINE 7650 .1 .0 24.8 25.0 99 ----- ----- Basin wide percent of average 40 105 WIND RIVER BURROUGHS CREEK 8750 .0 .1 0 28.7 29.1 99 COLD SPRINGS 9630 .1 .1 100 20.7 23.2 89 DEER PARK 9700 .0 .3 0 33.4 37.4 89 HOBBS PARK 10100 .1 .2 50 27.6 27.7 100 LITTLE WARM 9370 .0 .1 0 25.7 26.8 96 SOUTH PASS 9040 .0 .1 0 29.9 31.4 95 ST. LAWRENCE ALT 8620 .1 .0 18.8 20.9 90 TOGWOTEE PASS 9580 .0 .0 100 43.6 39.8 110 TOWNSEND CREEK 8700 .1 .1 100 24.9 24.8 100 ----- ----- Basin wide percent of average 30 97 BIGHORN BASIN BALD MTN. 9380 .0 .1 0 32.5 33.0 98 BEAR TRAP MEADOW 8200 .0 .1 0 25.4 20.6 123 BLACKWATER 9780 .0 .2 0 41.1 37.7 109 BONE SPRINGS DIV 9350 .0 .1 0 33.4 31.2 107 EVENING STAR 9200 .1 .3 33 53.7 43.4 124 GRAVE SPRINGS 8550 .0 .0 100 22.2 22.2 100 KIRWIN 9550 .1 .2 50 26.8 26.4 102 MARQUETTE 8760 .0 .2 0 26.4 26.5 100 MIDDLE POWDER 7760 .2 .1 200 24.1 25.5 95 OWL CREEK 8975 .1 .2 50 17.6 17.4 101 POWDER RIVER PASS 9480 .0 .1 0 30.7 26.7 115 SHELL CREEK 9580 .1 .2 50 31.9 28.5 112 SYLVAN LAKE 8420 .0 .1 0 42.3 36.5 116 SYLVAN ROAD 7120 .1 .0 32.8 29.7 110 TIMBER CREEK 7950 .0 .1 0 23.9 21.3 112 YOUNTS PEAK 8350 .0 .0 100 28.5 30.4 94 ----- ----- Basin wide percent of average 30 108 SHOSHONE RIVER BLACKWATER 9780 .0 .2 0 41.1 37.7 109 EVENING STAR 9200 .1 .3 33 53.7 43.4 124 KIRWIN 9550 .1 .2 50 26.8 26.4 102 MARQUETTE 8760 .0 .2 0 26.4 26.5 100 SYLVAN LAKE 8420 .0 .1 0 42.3 36.5 116 SYLVAN ROAD 7120 .1 .0 32.8 29.7 110 YOUNTS PEAK 8350 .0 .0 100 28.5 30.4 94 ----- ----- Basin wide percent of average 20 109 POWDER-TONGUE BEAR TRAP MEADOW 8200 .0 .1 0 25.4 20.6 123 BIG GOOSE 7990 .0 .0 100 27.5 22.2 124 BONE SPRINGS DIV 9350 .0 .1 0 33.4 31.2 107 BURGESS JUNCTION 7880 .0 .1 0 30.6 25.8 119 CLOUD PEAK RESERVOIR 9860 .1 .0 36.3 30.2 120 DOME LAKE 8880 .0 .1 0 32.8 28.1 117 GRAVE SPRINGS 8550 .0 .0 100 22.2 22.2 100 HANSEN SAWMILL 8360 .0 .2 0 27.6 21.5 128 MIDDLE POWDER 7760 .2 .1 200 24.1 25.5 95 POWDER RIVER PASS 9480 .0 .1 0 30.7 26.7 115 SUCKER CREEK 8880 .0 .1 0 35.9 29.2 123 TIE CREEK 6870 .0 .0 100 28.3 24.3 116 ----- ----- Basin wide percent of average 22 115 BELLE FOURCHE BLIND PARK 6890 .1 .0 30.2 26.3 115 COLE CANYON 5910 .2 .0 29.8 22.1 135 NORTH RAPID CREEK 6130 .0 .0 100 36.4 24.6 148 ----- ----- Basin wide percent of average * 132 UPPER N. PLATTE RIVER COLUMBINE 9160 .0 .0 100 40.4 37.4 108 DIVIDE PEAK 8880 .0 .0 100 36.1 32.7 110 ELK RIVER 8700 .3 .0 34.5 31.7 109 JOE WRIGHT 10120 .2 .0 45.8 43.8 105 NORTH FRENCH CREEK 10130 -M .0 * 44.9 41.7 108 OLD BATTLE 10000 -M .0 * -M 50.6 * SAGE CREEK BASIN 7850 .0 .0 100 26.3 19.0 138 SOUTH BRUSH CREEK 8440 .1 .0 26.9 30.3 89 TOWER 10500 .0 .0 100 57.3 57.4 100 WEBBER SPRINGS 9250 .0 .0 100 45.2 40.8 111 WILLOW CREEK PASS 9540 .1 .0 28.7 25.8 111 ----- ----- Basin wide percent of average * 107 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 .0 .0 100 33.0 37.8 87 CASPER MTN. 7900 .0 .0 100 33.2 29.6 112 DEADMAN HILL 10220 .1 .0 32.1 30.9 104 DEER PARK 9700 .0 .3 0 33.4 37.4 89 LAPRELE CREEK 8375 -M .0 * 24.3 27.0 90 RENO HILL 8400 .0 .0 100 35.1 30.6 115 ROACH 9700 .1 .0 35.0 32.8 107 SAND LAKE 10050 .1 .0 46.4 41.0 113 SOUTH PASS 9040 .0 .1 0 29.9 31.4 95 WINDY PEAK 7900 .3 .0 23.7 23.3 102 ----- ----- Basin wide percent of average 0 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 25.4 24.9 102 DIVIDE PEAK 8880 .0 .0 100 36.1 32.7 110 OLD BATTLE 10000 -M .0 * -M 50.6 * SANDSTONE RS 8150 .6 .0 33.1 30.2 110 WHISKEY PARK 8950 .0 .0 100 49.4 44.1 112 ----- ----- Basin wide percent of average * 109 UPPER GREEN RIVER BIG SANDY OPENING 9080 .1 .0 21.9 24.2 90 BLIND BULL SUM 8650 -M .0 * -M 33.7 * EAST RIM DIVIDE 7930 .0 .0 100 17.1 20.8 82 ELKHART PARK G.S. 9400 .1 .0 19.6 25.6 77 GROS VENTRE SUMMIT 8750 .1 .0 22.2 24.3 91 GUNSIGHT PASS 9820 .2 -M * 24.2 -M * KENDALL R.S. 7740 .0 .0 100 20.3 23.5 86 LOOMIS PARK 8240 .0 .0 100 25.8 28.4 91 NEW FORK LAKE 8340 .2 .0 17.0 21.5 79 SNIDER BASIN 8060 .2 .0 20.4 24.4 84 SPRING CREEK DIVIDE 9000 .0 .0 100 33.9 38.7 88 TRIPLE PEAK 8500 -M .0 * 41.6 37.8 110 ----- ----- Basin wide percent of average * 89 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 100 17.0 21.3 80 HEWINTA 9519 .0 .0 100 29.8 27.1 110 HICKERSON PARK 9145 .0 .0 100 22.1 18.9 117 HOLE-IN-ROCK 9150 .0 .0 100 20.3 18.8 108 INDIAN CREEK 9425 .0 .0 100 32.6 37.6 87 KELLEY R.S. 8180 .2 .0 26.1 30.8 85 STEEL CREEK PARK 10200 .8 .1 800 32.2 30.1 107 ----- ----- Basin wide percent of average 800 98 UPPER BEAR RIVER BUG LAKE 7950 .1 .1 100 25.7 29.7 87 HAYDEN FORK 9212 .0 .0 100 34.8 34.9 100 KELLEY R.S. 8180 .2 .0 26.1 30.8 85 LILY LAKE 9156 .1 .0 28.4 30.0 95 MONTE CRISTO 8960 .0 .0 100 35.2 39.4 89 SALT RIVER SUMMIT 7760 .0 .0 100 24.3 29.0 84 TRIAL LAKE 9992 -M .1 * 36.9 40.9 90 ----- ----- Basin wide percent of average 100 90 ----------------------------------------------------------------------------- -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.