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: SEPTEMBER 23 , 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 .0 100 33.0 32.7 101 COTTONWOOD CREEK 7670 .0 .0 100 50.1 42.2 119 GRAND TARGHEE 9260 .1 -M * 53.5 -M * GRANITE CREEK 6770 .1 .0 32.9 30.2 109 GRASSY LAKE 7265 .1 .0 53.8 53.0 102 GROS VENTRE SUMMIT 8750 .0 .0 100 26.6 24.4 109 GUNSIGHT PASS 9820 .0 -M * 31.1 -M * LEWIS LAKE DIVIDE 7850 .0 .0 100 51.4 52.7 98 PHILLIPS BENCH 8200 .1 .0 45.4 43.2 105 SALT RIVER SUMMIT 7760 .2 .0 28.6 29.2 98 SNAKE RIVER STATION 6920 .0 .0 100 37.0 34.7 107 SPRING CREEK DIVIDE 9000 .1 .0 41.5 38.9 107 THUMB DIVIDE 7980 .0 .0 100 35.1 30.0 117 TOGWOTEE PASS 9580 .0 .0 100 46.8 40.0 117 TWO OCEAN PLATEAU 9240 .0 .0 100 48.5 44.4 109 WILLOW CREEK 8380 .1 .0 60.9 50.9 120 ----- ----- Basin wide percent of average * 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 .0 .2 0 37.6 34.7 108 BLACK BEAR 8170 .0 .1 0 53.9 59.0 91 CANYON 7870 .0 .0 100 29.2 27.2 107 FISHER CREEK 9100 .0 .1 0 54.0 57.5 94 MADISON PLATEAU 7750 .0 .1 0 39.2 41.5 94 NORTHEAST ENTRANCE 7350 .0 .0 100 26.4 25.5 104 PARKER PEAK 9400 .0 .3 0 33.4 30.4 110 SYLVAN LAKE 8420 .0 .1 0 40.1 36.7 109 THUMB DIVIDE 7980 .0 .0 100 35.1 30.0 117 TWO OCEAN PLATEAU 9240 .0 .0 100 48.5 44.4 109 WHISKEY CREEK 6800 .0 .0 100 31.8 34.7 92 WHITE MILL 8700 .0 .1 0 41.3 44.7 92 WOLVERINE 7650 .0 .0 100 24.9 25.1 99 ----- ----- Basin wide percent of average 0 101 WIND RIVER BURROUGHS CREEK 8750 .0 .1 0 30.9 29.2 106 COLD SPRINGS 9630 .0 .1 0 22.5 23.4 96 DEER PARK 9700 .0 .4 0 33.0 37.5 88 HOBBS PARK 10100 .0 .3 0 29.4 27.9 105 LITTLE WARM 9370 .0 .1 0 28.5 26.9 106 SOUTH PASS 9040 .0 .1 0 28.8 31.5 91 ST. LAWRENCE ALT 8620 .0 .1 0 21.1 21.0 100 TOGWOTEE PASS 9580 .0 .0 100 46.8 40.0 117 TOWNSEND CREEK 8700 .0 .1 0 25.7 24.9 103 ----- ----- Basin wide percent of average 0 102 BIGHORN BASIN BALD MTN. 9380 .0 .2 0 29.9 33.2 90 BEAR TRAP MEADOW 8200 .0 .1 0 23.3 20.8 112 BLACKWATER 9780 .0 .3 0 40.0 37.8 106 BONE SPRINGS DIV 9350 .0 .2 0 28.7 31.4 91 EVENING STAR 9200 .0 .3 0 49.5 43.6 114 GRAVE SPRINGS 8550 .0 .1 0 19.4 22.4 87 KIRWIN 9550 .0 .3 0 30.4 26.6 114 MARQUETTE 8760 .0 .3 0 21.4 26.7 80 MIDDLE POWDER 7760 .0 .1 0 25.4 25.6 99 OWL CREEK 8975 .0 .2 0 21.4 17.6 122 POWDER RIVER PASS 9480 .0 .2 0 29.4 26.8 110 SHELL CREEK 9580 .0 .3 0 29.8 28.6 104 SYLVAN LAKE 8420 .0 .1 0 40.1 36.7 109 SYLVAN ROAD 7120 .0 .0 100 33.3 29.8 112 TIMBER CREEK 7950 .0 .2 0 20.2 21.4 94 YOUNTS PEAK 8350 .0 .1 0 29.1 30.6 95 ----- ----- Basin wide percent of average 0 103 SHOSHONE RIVER BLACKWATER 9780 .0 .3 0 40.0 37.8 106 EVENING STAR 9200 .0 .3 0 49.5 43.6 114 KIRWIN 9550 .0 .3 0 30.4 26.6 114 MARQUETTE 8760 .0 .3 0 21.4 26.7 80 SYLVAN LAKE 8420 .0 .1 0 40.1 36.7 109 SYLVAN ROAD 7120 .0 .0 100 33.3 29.8 112 YOUNTS PEAK 8350 .0 .1 0 29.1 30.6 95 ----- ----- Basin wide percent of average 0 105 POWDER-TONGUE BEAR TRAP MEADOW 8200 .0 .1 0 23.3 20.8 112 BIG GOOSE 7990 .0 .0 100 24.0 22.3 108 BONE SPRINGS DIV 9350 .0 .2 0 28.7 31.4 91 BURGESS JUNCTION 7880 .0 .1 0 25.0 25.9 97 CLOUD PEAK RESERVOIR 9860 .0 .0 100 31.6 30.4 104 DOME LAKE 8880 .0 .2 0 28.3 28.3 100 GRAVE SPRINGS 8550 .0 .1 0 19.4 22.4 87 HANSEN SAWMILL 8360 .0 .2 0 21.3 21.7 98 MIDDLE POWDER 7760 .0 .1 0 25.4 25.6 99 POWDER RIVER PASS 9480 .0 .2 0 29.4 26.8 110 SUCKER CREEK 8880 .0 .2 0 32.3 29.4 110 TIE CREEK 6870 .0 .1 0 29.2 24.4 120 ----- ----- Basin wide percent of average 0 103 BELLE FOURCHE BLIND PARK 6890 .0 .0 100 28.9 26.4 109 COLE CANYON 5910 .0 .0 100 27.6 22.2 124 NORTH RAPID CREEK 6130 .0 .0 100 24.9 24.7 101 ----- ----- Basin wide percent of average * 111 UPPER N. PLATTE RIVER COLUMBINE 9160 .2 .0 40.3 37.5 107 DIVIDE PEAK 8880 .2 .0 42.3 32.8 129 ELK RIVER 8700 .0 .0 100 33.9 31.8 107 JOE WRIGHT 10120 .2 .0 45.4 44.0 103 NORTH FRENCH CREEK 10130 -M .0 * 49.3 41.8 118 OLD BATTLE 10000 .0 .0 100 56.9 50.7 112 SAGE CREEK BASIN 7850 .0 .0 100 26.2 19.0 138 SOUTH BRUSH CREEK 8440 .0 .0 100 28.4 30.4 93 TOWER 10500 .1 .0 61.6 57.5 107 WEBBER SPRINGS 9250 .0 .0 100 44.0 41.0 107 WILLOW CREEK PASS 9540 .0 .0 100 24.6 25.9 95 ----- ----- Basin wide percent of average * 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 .1 .0 35.2 37.9 93 CASPER MTN. 7900 .4 .0 28.5 29.7 96 DEADMAN HILL 10220 -M .0 * 29.9 31.0 96 DEER PARK 9700 .0 .4 0 33.0 37.5 88 LAPRELE CREEK 8375 .7 .0 24.3 27.1 90 RENO HILL 8400 .9 .0 29.7 30.7 97 ROACH 9700 .7 .0 33.5 33.0 102 SAND LAKE 10050 .7 .0 47.0 41.2 114 SOUTH PASS 9040 .0 .1 0 28.8 31.5 91 WINDY PEAK 7900 .1 .0 24.7 23.4 106 ----- ----- Basin wide percent of average 0* 97 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 30.0 25.0 120 DIVIDE PEAK 8880 .2 .0 42.3 32.8 129 OLD BATTLE 10000 .0 .0 100 56.9 50.7 112 SANDSTONE RS 8150 .0 .0 100 32.7 30.3 108 WHISKEY PARK 8950 .0 .0 100 49.4 44.2 112 ----- ----- Basin wide percent of average * 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 .0 .0 100 27.4 24.3 113 BLIND BULL SUM 8650 .0 .0 100 33.7 33.9 99 EAST RIM DIVIDE 7930 .0 .0 100 22.1 20.8 106 ELKHART PARK G.S. 9400 .1 .0 28.7 25.7 112 GROS VENTRE SUMMIT 8750 .0 .0 100 26.6 24.4 109 GUNSIGHT PASS 9820 .0 -M * 31.1 -M * KENDALL R.S. 7740 .1 .0 24.8 23.6 105 LOOMIS PARK 8240 .1 .0 31.3 28.5 110 NEW FORK LAKE 8340 .0 .0 100 22.6 21.6 105 SNIDER BASIN 8060 .1 .0 24.3 24.5 99 SPRING CREEK DIVIDE 9000 .1 .0 41.5 38.9 107 TRIPLE PEAK 8500 .1 .0 42.0 37.9 111 ----- ----- Basin wide percent of average * 107 LOWER GREEN RIVER HAMS FORK 7840 .1 .0 23.6 21.4 110 HEWINTA 9519 .0 .0 100 24.6 27.2 90 HICKERSON PARK 9145 .0 .0 100 24.6 19.0 129 HOLE-IN-ROCK 9150 .0 .0 100 20.6 18.9 109 INDIAN CREEK 9425 .1 .0 34.7 37.7 92 KELLEY R.S. 8180 .4 .0 30.9 30.9 100 STEEL CREEK PARK 10200 .0 .1 0 29.7 30.3 98 ----- ----- Basin wide percent of average 0 102 UPPER BEAR RIVER BUG LAKE 7950 .1 .1 100 28.1 29.8 94 HAYDEN FORK 9212 .0 .0 100 35.9 35.0 103 KELLEY R.S. 8180 .4 .0 30.9 30.9 100 LILY LAKE 9156 .0 .0 100 29.6 30.2 98 MONTE CRISTO 8960 .0 .0 100 40.0 39.6 101 SALT RIVER SUMMIT 7760 .2 .0 28.6 29.2 98 TRIAL LAKE 9992 .1 .1 100 -M 41.1 * ----- ----- Basin wide percent of average 100 99 ----------------------------------------------------------------------------- -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.