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 25 , 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* 37.5 33.8 112 COTTONWOOD CREEK 7600 .2 .0 * 45.5 37.4 122 GRANITE CREEK 6770 .2 .0 * 35.3 37.8 94 GRASSY LAKE 7265 .0 .0 100* 60.5 55.5 110 GROS VENTRE SUMMIT 8775 .0 .0 100* 26.7 25.7 104 LEWIS LAKE DIVIDE 7860 .0 .0 100* 54.9 56.5 97 PHILLIPS BENCH 8200 .0 .0 100* 45.9 44.5 103 SALT RIVER SUMMIT 7600 .3 .0 * 31.5 27.2 117 SNAKE RIVER STATION 6920 .0 .0 100* 39.9 39.0 103 SPRING CREEK DIVIDE 9000 .0 .0 100* 44.0 40.0 111 THUMB DIVIDE 7980 .0 .0 100* 35.8 31.7 113 TOGWOTEE PASS 9580 .0 .0 100* 42.2 42.5 100 TWO OCEAN PLATEAU 9360 .3 .0 * 47.5 46.5 102 WILLOW CREEK 8450 .0 .0 100* 59.4 47.9 125 ----- ----- Basin wide percent of average * 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M .5 * -M 32.7 * BLACK BEAR 7950 .0 .4 0* 71.4 61.3 117 CANYON 7940 .2 .2 100* 30.4 27.4 111 FISHER CREEK 9100 .3 .4 67* 55.7 58.5 96 MADISON PLATEAU 7750 .0 .3 0* 47.0 42.4 111 NORTHEAST ENTRANCE 7350 .2 .0 * 25.9 24.9 105 PARKER PEAK 9400 .3 .7 34* -M 31.4 * SYLVAN LAKE 8420 .2 .5 21* 44.2 36.9 120 THUMB DIVIDE 7980 .0 .0 100* 35.8 31.7 113 TWO OCEAN PLATEAU 9360 .3 .0 * 47.5 46.5 102 WHISKEY CREEK 6800 .0 .0 100* 39.2 36.3 109 WHITE MILL 8700 .2 .3 50* 39.3 46.7 85 WOLVERINE 7650 .0 .0 100* 22.9 26.4 87 ----- ----- Basin wide percent of average 32* 105 WIND RIVER BURROUGHS CREEK 8750 .0 .2 0* 32.4 29.5 110 COLD SPRINGS 9630 .2 .2 100* 30.4 22.9 133 DEER PARK 9700 .0 -M * 43.0 -M * HOBBS PARK 10100 .2 .3 50* 38.2 28.3 136 LITTLE WARM 9620 .2 .2 100* 32.2 26.8 121 SOUTH PASS 9040 .0 .3 0* 39.8 30.9 129 ST. LAWRENCE ALT 8620 .0 .0 100* 26.9 20.8 130 TOGWOTEE PASS 9580 .0 .0 100* 42.2 42.5 100 TOWNSEND CREEK 8700 .2 .0 * 32.5 25.3 129 ----- ----- Basin wide percent of average 43* 122 BIGHORN BASIN BALD MTN. 9375 .0 .5 0* 32.5 32.9 100 BEAR TRAP MEADOW 7900 .0 .2 0* -M 20.5 * BLACKWATER 9780 .0 .5 0* 40.0 37.0 109 BONE SPRINGS DIV 9350 .2 .7 17* 33.8 31.9 106 EVENING STAR 9200 .0 .5 0* 51.4 44.5 116 GRAVE SPRINGS 8550 .2 .3 50* 24.4 24.0 102 KIRWIN 9550 .2 .3 50* 30.0 26.0 116 MARQUETTE 8760 .0 .3 0* 31.2 25.9 121 MIDDLE POWDER 7760 .0 .3 0* 32.2 25.7 126 OWL CREEK 8975 .0 .3 0* 23.5 17.0 139 POWDER RIVER PASS 9480 .0 .3 0* 30.3 25.5 119 SHELL CREEK 9580 .2 .5 21* 30.2 28.3 107 SYLVAN LAKE 8420 .2 .5 21* 44.2 36.9 120 SYLVAN ROAD 8120 .0 .3 0* 30.5 32.0 96 TIMBER CREEK 7950 .0 .0 100* 25.7 21.0 123 YOUNTS PEAK 8350 .0 .3 0* 33.3 31.0 108 ----- ----- Basin wide percent of average 11* 113 SHOSHONE RIVER BLACKWATER 9780 .0 .5 0* 40.0 37.0 109 EVENING STAR 9200 .0 .5 0* 51.4 44.5 116 KIRWIN 9550 .2 .3 50* 30.0 26.0 116 MARQUETTE 8760 .0 .3 0* 31.2 25.9 121 SYLVAN LAKE 8420 .2 .5 21* 44.2 36.9 120 SYLVAN ROAD 8120 .0 .3 0* 30.5 32.0 96 YOUNTS PEAK 8350 .0 .3 0* 33.3 31.0 108 ----- ----- Basin wide percent of average 10* 112 POWDER-TONGUE BEAR TRAP MEADOW 7900 .0 .2 0* -M 20.5 * BIG GOOSE 7990 .0 -M * 25.5 -M * BONE SPRINGS DIV 9350 .2 .7 17* 33.8 31.9 106 BURGESS JUNCTION 7880 .2 .3 50* 24.4 25.0 98 CLOUD PEAK RESERVOIR 9860 .2 .3 50* 33.0 30.0 111 DOME LAKE 8880 .3 .3 100* 24.5 27.9 89 GRAVE SPRINGS 8550 .2 .3 50* 24.4 24.0 102 HANSEN SAWMILL 8760 .0 .2 0* 23.8 20.7 116 MIDDLE POWDER 7760 .0 .3 0* 32.2 25.7 126 POWDER RIVER PASS 9480 .0 .3 0* 30.3 25.5 119 SUCKER CREEK 8880 .2 .3 50* 31.2 28.8 109 TIE CREEK 6870 .0 -M * 27.9 24.0 117 ----- ----- Basin wide percent of average 32* 109 BELLE FOURCHE BLIND PARK 6890 .0 .2 0* 32.9 28.4 116 NORTH RAPID CREEK 6130 .0 -M * 30.2 -M * WARREN PEAK 6520 .2 .2 100* 31.3 21.9 144 ----- ----- Basin wide percent of average 50* 128 UPPER N. PLATTE RIVER COLUMBINE 9400 .4 .0 * 36.9 37.0 100 DIVIDE PEAK 8800 .4 .0 * 41.3 37.4 111 ELK RIVER 8700 .0 .0 100* 39.0 30.9 127 JOE WRIGHT 10120 .4 .0 * 44.9 45.5 99 NORTH FRENCH CREEK 10100 .3 .0 * 44.9 40.0 113 OLD BATTLE 10000 .0 .4 0* 59.0 47.9 124 SOUTH BRUSH CREEK 8400 .0 .0 100* 34.8 31.0 113 TOWER 10500 .5 .0 * 59.2 58.3 102 WEBBER SPRINGS 9200 .2 .0 * 44.0 41.2 108 WILLOW CREEK PASS 9540 .0 .0 100* 25.8 26.0 99 ----- ----- Basin wide percent of average 0* 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 .2 .3 50* 41.9 33.9 124 CASPER MTN. 7900 .3 .0 * 31.0 29.7 105 DEADMAN HILL 10220 .0 .0 100* 31.9 32.5 98 DEER PARK 9700 .0 -M * 43.0 -M * LAPRELE CREEK 8320 .0 .0 100* 29.0 25.2 116 RENO HILL 8400 .2 .0 * 33.0 30.7 108 ROACH 9700 .0 .0 100* 34.3 37.5 92 SAND LAKE 10080 .0 .0 100* 48.7 35.4 138 SOUTH PASS 9040 .0 .3 0* 39.8 30.9 129 WINDY PEAK 7840 .0 .0 100* 26.5 21.9 122 ----- ----- Basin wide percent of average 25* 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100* 27.8 26.0 107 DIVIDE PEAK 8800 .4 .0 * 41.3 37.4 111 OLD BATTLE 10000 .0 .4 0* 59.0 47.9 124 SANDSTONE RS 8150 .0 .0 100* 33.2 33.0 101 WHISKEY PARK 8950 .0 .0 100* 46.4 44.5 105 ----- ----- Basin wide percent of average 0* 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 .0 .0 100* 27.4 26.2 105 BLIND BULL SUM 8650 .0 .0 100* 36.2 34.9 104 EAST RIM DIVIDE 7930 .0 .0 100* 24.5 24.5 100 ELKHART PARK G.S. 9400 .0 .0 100* 29.0 25.8 113 GROS VENTRE SUMMIT 8775 .0 .0 100* 26.7 25.7 104 KENDALL R.S. 7740 .0 .0 100* 27.0 25.0 109 LOOMIS PARK 8240 .2 .0 * 31.7 30.4 105 NEW FORK LAKE 8340 .0 .0 100* 24.9 23.4 107 SNIDER BASIN 8250 .0 .0 100* 29.4 24.5 121 SPRING CREEK DIVIDE 9000 .0 .0 100* 44.0 40.0 111 TRIPLE PEAK 8500 .0 .0 100* 46.5 47.0 100 ----- ----- Basin wide percent of average * 107 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 100* 24.8 21.5 115 HEWINTA 9500 .2 .0 * 28.0 25.7 110 HICKERSON PARK 9150 .2 .0 * 23.5 21.8 108 HOLE-IN-ROCK 9150 .0 .0 100* 23.8 21.8 110 INDIAN CREEK 9425 .0 .0 100* 41.5 39.0 107 KELLEY R.S. 8180 .0 .0 100* 31.5 30.3 105 STEEL CREEK PARK 10100 .0 .4 -0* 33.9 30.2 113 ----- ----- Basin wide percent of average 0* 109 UPPER BEAR RIVER BUG LAKE 7950 .2 .3 50* 34.5 29.9 116 HAYDEN FORK 9400 .3 .2 200* 37.0 33.4 111 KELLEY R.S. 8180 .0 .0 100* 31.5 30.3 105 LILY LAKE 9050 .8 .3 351* 32.9 27.7 119 MONTE CRISTO 8960 -M .3 * 44.9 40.2 112 SALT RIVER SUMMIT 7600 .3 .0 * 31.5 27.2 117 TRIAL LAKE 9960 .0 .3 0* 39.8 39.5 101 ----- ----- Basin wide percent of average 143* 111 ----------------------------------------------------------------------------- -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.