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 1 , 1999 ----------------------------------------------------------------------------- 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* 36.4 32.5 113 COTTONWOOD CREEK 7600 .2 .0 * 44.3 36.0 124 GRANITE CREEK 6770 .2 .0 * 33.3 36.0 93 GRASSY LAKE 7265 .0 .0 100* 59.5 53.5 112 GROS VENTRE SUMMIT 8775 .0 .0 100* 25.0 24.5 103 LEWIS LAKE DIVIDE 7860 .0 .0 100* 53.9 54.4 100 PHILLIPS BENCH 8200 .2 .0 * 44.3 42.9 104 SALT RIVER SUMMIT 7600 .2 .0 * 30.5 26.0 118 SNAKE RIVER STATION 6920 .0 .0 100* 38.8 37.5 104 SPRING CREEK DIVIDE 9000 .3 .0 * 42.8 38.5 111 THUMB DIVIDE 7980 .0 .0 100* 34.4 30.4 114 TOGWOTEE PASS 9580 .0 .0 100* 41.0 40.9 101 TWO OCEAN PLATEAU 9360 .2 .0 * 46.0 44.5 104 WILLOW CREEK 8450 .0 .0 100* 57.5 46.0 125 ----- ----- Basin wide percent of average * 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 .0 .0 100* 36.0 31.5 115 BLACK BEAR 7950 .0 .0 100* 71.3 59.0 121 CANYON 7940 .0 .0 100* 29.5 25.5 116 FISHER CREEK 9100 .0 .0 100* 54.4 56.3 97 MADISON PLATEAU 7750 .0 .0 100* 46.8 40.4 116 NORTHEAST ENTRANCE 7350 .0 .0 100* 24.7 23.0 107 PARKER PEAK 9400 .2 .0 * 33.7 29.4 115 SYLVAN LAKE 8420 .0 .0 100* 42.9 34.5 125 THUMB DIVIDE 7980 .0 .0 100* 34.4 30.4 114 TWO OCEAN PLATEAU 9360 .2 .0 * 46.0 44.5 104 WHISKEY CREEK 6800 .3 .0 * 38.2 34.5 111 WHITE MILL 8700 .0 .0 100* 37.9 44.5 85 WOLVERINE 7650 .0 .0 100* 21.7 24.8 88 ----- ----- Basin wide percent of average * 109 WIND RIVER BURROUGHS CREEK 8750 .4 .0 * 30.0 27.5 109 COLD SPRINGS 9630 .0 .0 100* 28.8 21.0 137 DEER PARK 9700 .4 -M * 41.8 -M * HOBBS PARK 10100 .0 .0 100* 33.9 26.5 128 LITTLE WARM 9620 .2 .0 * 30.8 25.0 124 SOUTH PASS 9040 -M .0 * -M 29.4 * ST. LAWRENCE ALT 8620 .2 .0 * 24.9 19.5 128 TOGWOTEE PASS 9580 .0 .0 100* 41.0 40.9 101 TOWNSEND CREEK 8700 .3 .0 * 30.9 23.5 132 ----- ----- Basin wide percent of average * 120 BIGHORN BASIN BALD MTN. 9375 .0 .0 100* 31.5 30.9 102 BEAR TRAP MEADOW 7900 .0 .0 100* -M 19.0 * BLACKWATER 9780 .0 .0 100* 38.4 34.3 112 BONE SPRINGS DIV 9350 -M .0 * 31.5 29.5 107 EVENING STAR 9200 .0 .0 100* 49.8 41.4 121 GRAVE SPRINGS 8550 .3 .0 * 23.0 22.3 104 KIRWIN 9550 .2 .0 * 28.3 23.8 119 MARQUETTE 8760 .0 .0 100* 29.0 24.0 122 MIDDLE POWDER 7760 .3 .0 * 29.8 24.0 124 OWL CREEK 8975 .0 .0 100* 21.3 15.8 136 POWDER RIVER PASS 9480 .2 .0 * 28.8 23.9 121 SHELL CREEK 9580 .0 .0 100* 28.3 26.4 108 SYLVAN LAKE 8420 .0 .0 100* 42.9 34.5 125 SYLVAN ROAD 8120 .0 .0 100* 29.2 30.0 98 TIMBER CREEK 7950 .2 .0 * 22.2 19.4 115 YOUNTS PEAK 8350 .0 .0 100* 31.0 29.0 107 ----- ----- Basin wide percent of average * 114 SHOSHONE RIVER BLACKWATER 9780 .0 .0 100* 38.4 34.3 112 EVENING STAR 9200 .0 .0 100* 49.8 41.4 121 KIRWIN 9550 .2 .0 * 28.3 23.8 119 MARQUETTE 8760 .0 .0 100* 29.0 24.0 122 SYLVAN LAKE 8420 .0 .0 100* 42.9 34.5 125 SYLVAN ROAD 8120 .0 .0 100* 29.2 30.0 98 YOUNTS PEAK 8350 .0 .0 100* 31.0 29.0 107 ----- ----- Basin wide percent of average * 115 POWDER-TONGUE BEAR TRAP MEADOW 7900 .0 .0 100* -M 19.0 * BIG GOOSE 7990 .0 -M * 22.9 -M * BONE SPRINGS DIV 9350 -M .0 * 31.5 29.5 107 BURGESS JUNCTION 7880 .2 .0 * 23.3 23.3 100 CLOUD PEAK RESERVOIR 9860 .2 .0 * 31.0 28.0 111 DOME LAKE 8880 .0 .0 100* 22.4 25.9 87 GRAVE SPRINGS 8550 .3 .0 * 23.0 22.3 104 HANSEN SAWMILL 8760 .5 .0 * 21.8 19.0 115 MIDDLE POWDER 7760 .3 .0 * 29.8 24.0 124 POWDER RIVER PASS 9480 .2 .0 * 28.8 23.9 121 SUCKER CREEK 8880 .2 .0 * 29.2 27.0 109 TIE CREEK 6870 .3 -M * 25.8 22.4 116 ----- ----- Basin wide percent of average * 109 BELLE FOURCHE BLIND PARK 6890 .3 .0 * 31.5 26.8 118 NORTH RAPID CREEK 6130 .2 -M * 29.5 -M * WARREN PEAK 6520 .2 .0 * 30.0 20.5 146 ----- ----- Basin wide percent of average * 130 UPPER N. PLATTE RIVER COLUMBINE 9400 .2 .0 * 36.0 36.0 101 DIVIDE PEAK 8800 .0 .0 100* 40.0 35.4 114 ELK RIVER 8700 .0 .0 100* 37.5 29.4 128 JOE WRIGHT 10120 .2 .0 * 42.9 43.0 100 NORTH FRENCH CREEK 10100 .0 .0 100* 45.0 38.0 119 OLD BATTLE 10000 .0 .0 100* 57.0 45.5 126 SOUTH BRUSH CREEK 8400 -M .0 * 32.0 29.0 111 TOWER 10500 -M .0 * -M 56.0 * WEBBER SPRINGS 9200 .2 .0 * 42.5 39.0 110 WILLOW CREEK PASS 9540 .0 .0 100* 24.9 24.5 102 ----- ----- Basin wide percent of average * 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 .4 .0 * 40.5 32.5 125 CASPER MTN. 7900 .0 .0 100* 29.8 28.5 105 DEADMAN HILL 10220 .0 .0 100* 30.8 31.0 100 DEER PARK 9700 .4 -M * 41.8 -M * LAPRELE CREEK 8320 .2 .0 * 27.5 23.9 116 RENO HILL 8400 .0 .0 100* 31.9 29.5 108 ROACH 9700 .0 .0 100* 33.3 35.9 93 SAND LAKE 10080 .2 .0 * 47.0 33.5 141 SOUTH PASS 9040 -M .0 * -M 29.4 * WINDY PEAK 7840 .2 .0 * 25.5 21.0 122 ----- ----- Basin wide percent of average * 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 27.3 24.3 113 DIVIDE PEAK 8800 .0 .0 100* 40.0 35.4 114 OLD BATTLE 10000 .0 .0 100* 57.0 45.5 126 SANDSTONE RS 8150 .0 .0 100* 32.3 31.0 104 WHISKEY PARK 8950 .0 .0 100* 45.2 43.0 105 ----- ----- Basin wide percent of average * 113 UPPER GREEN RIVER BIG SANDY OPENING 9100 .0 .0 100* 25.4 25.0 102 BLIND BULL SUM 8650 .3 .0 * 34.9 33.5 104 EAST RIM DIVIDE 7930 .4 .0 * 23.0 23.4 99 ELKHART PARK G.S. 9400 .3 .0 * 26.5 24.5 109 GROS VENTRE SUMMIT 8775 .0 .0 100* 25.0 24.5 103 KENDALL R.S. 7740 .0 .0 100* 25.5 23.9 108 LOOMIS PARK 8240 .0 .0 100* 30.3 28.9 105 NEW FORK LAKE 8340 .0 .0 100* 22.5 22.3 101 SNIDER BASIN 8250 .0 .0 100* 28.3 23.4 122 SPRING CREEK DIVIDE 9000 .3 .0 * 42.8 38.5 111 TRIPLE PEAK 8500 .0 .0 100* 45.2 45.0 101 ----- ----- Basin wide percent of average * 106 LOWER GREEN RIVER HAMS FORK 7840 .2 .0 * 23.7 20.5 116 HEWINTA 9500 .2 .0 * 26.3 24.5 108 HICKERSON PARK 9150 .4 .0 * 21.5 20.5 105 HOLE-IN-ROCK 9150 .0 .0 100* 22.0 20.5 107 INDIAN CREEK 9425 .5 .0 * 40.7 37.4 109 KELLEY R.S. 8180 .0 .0 100* 30.5 28.8 106 STEEL CREEK PARK 10100 .0 .0 100* 31.7 28.5 111 ----- ----- Basin wide percent of average * 109 UPPER BEAR RIVER BUG LAKE 7950 .2 .0 * 33.8 28.3 120 HAYDEN FORK 9400 .3 .0 * 35.5 31.5 113 KELLEY R.S. 8180 .0 .0 100* 30.5 28.8 106 LILY LAKE 9050 -M .0 * 31.5 26.3 121 MONTE CRISTO 8960 .0 .0 100* 43.7 38.4 114 SALT RIVER SUMMIT 7600 .2 .0 * 30.5 26.0 118 TRIAL LAKE 9960 .0 .0 100* 38.5 37.5 103 ----- ----- Basin wide percent of average * 113 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. 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.