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 SUNDAY: MAY 23 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 7.5 2.7 285 30.9 27.2 114 COTTONWOOD CREEK 7600 18.4 7.5 245 36.7 30.4 121 GRANITE CREEK 6770 9.2 4.8 196 27.9 29.0 96 GRASSY LAKE 7265 36.0 20.2 180 49.8 45.2 111 GROS VENTRE SUMMIT 8775 -M 5.5 * -M 19.7 * LEWIS LAKE DIVIDE 7860 36.3 25.0 146 46.3 45.8 101 PHILLIPS BENCH 8200 29.4 21.7 136 37.3 36.2 104 SALT RIVER SUMMIT 7600 4.5 .0 * 22.9 20.9 111 SNAKE RIVER STATION 6920 5.3 6.1 87 30.4 31.7 96 SPRING CREEK DIVIDE 9000 35.5 22.9 156 36.3 33.0 111 THUMB DIVIDE 7980 13.9 6.0 231 28.0 25.4 111 TOGWOTEE PASS 9580 -M 24.9 * 35.8 34.4 105 TWO OCEAN PLATEAU 9360 40.2 24.7 164 37.2 37.4 100 WILLOW CREEK 8450 29.2 23.9 123 49.0 38.9 126 ----- ----- Basin wide percent of average 158 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.0 22.4 121 28.2 23.9 118 BLACK BEAR 7950 58.3 32.7 179 60.3 49.5 122 CANYON 7940 9.5 4.3 227 22.9 18.2 126 FISHER CREEK 9100 39.3 34.8 113 43.9 45.8 97 MADISON PLATEAU 7750 -M 13.6 * 39.3 32.4 121 NORTHEAST ENTRANCE 7350 .0 1.5 0 17.9 15.9 113 PARKER PEAK 9400 24.9 20.9 120 -M 20.7 * SYLVAN LAKE 8420 -M 17.7 * -M 25.2 * THUMB DIVIDE 7980 13.9 6.0 231 28.0 25.4 111 TWO OCEAN PLATEAU 9360 40.2 24.7 164 37.2 37.4 100 WHISKEY CREEK 6800 14.7 5.6 263 30.4 26.9 113 WHITE MILL 8700 28.5 22.4 128 30.2 35.5 86 WOLVERINE 7650 .0 1.7 0 15.5 17.4 90 ----- ----- Basin wide percent of average 146 108 WIND RIVER BURROUGHS CREEK 8750 16.5 4.6 359 23.5 21.7 109 COLD SPRINGS 9630 15.2 1.7 895 24.9 15.4 163 DEER PARK 9700 25.4 -M * 34.2 -M * HOBBS PARK 10100 29.5 13.5 221 29.2 19.9 147 LITTLE WARM 9620 16.4 3.3 513 25.2 18.5 136 SOUTH PASS 9040 21.4 13.5 159 31.2 23.2 136 ST. LAWRENCE ALT 8620 8.0 1.4 565 21.7 14.2 153 TOGWOTEE PASS 9580 -M 24.9 * 35.8 34.4 105 TOWNSEND CREEK 8700 14.5 4.1 354 26.7 17.9 150 ----- ----- Basin wide percent of average 290 133 BIGHORN BASIN BALD MTN. 9375 24.9 21.7 115 26.2 24.0 110 BEAR TRAP MEADOW 7900 .9 .9 100 18.2 13.0 141 BLACKWATER 9780 33.4 22.0 152 31.2 23.2 136 BONE SPRINGS DIV 9350 22.5 12.7 178 26.2 21.2 124 EVENING STAR 9200 34.5 28.2 123 41.2 28.9 143 GRAVE SPRINGS 8550 7.0 6.8 103 19.0 15.1 126 KIRWIN 9550 16.4 7.8 211 21.7 15.5 141 MARQUETTE 8760 17.9 6.0 297 22.0 16.2 136 MIDDLE POWDER 7760 14.0 8.6 162 22.9 17.4 133 OWL CREEK 8975 8.0 .6 1334 15.5 10.0 156 POWDER RIVER PASS 9480 11.0 3.9 280 22.9 17.2 134 SHELL CREEK 9580 19.2 14.4 135 21.5 18.7 115 SYLVAN LAKE 8420 -M 17.7 * -M 25.2 * SYLVAN ROAD 8120 -M 2.7 * -M 20.9 * TIMBER CREEK 7950 8.5 1.5 567 18.4 12.7 145 YOUNTS PEAK 8350 19.7 12.7 155 22.9 21.5 107 ----- ----- Basin wide percent of average 161 130 SHOSHONE RIVER BLACKWATER 9780 33.4 22.0 152 31.2 23.2 136 EVENING STAR 9200 34.5 28.2 123 41.2 28.9 143 KIRWIN 9550 16.4 7.8 211 21.7 15.5 141 MARQUETTE 8760 17.9 6.0 297 22.0 16.2 136 SYLVAN LAKE 8420 -M 17.7 * -M 25.2 * SYLVAN ROAD 8120 -M 2.7 * -M 20.9 * YOUNTS PEAK 8350 19.7 12.7 155 22.9 21.5 107 ----- ----- Basin wide percent of average 159 133 POWDER-TONGUE BEAR TRAP MEADOW 7900 .9 .9 100 18.2 13.0 141 BIG GOOSE 7990 8.0 -M * 19.7 -M * BONE SPRINGS DIV 9350 22.5 12.7 178 26.2 21.2 124 BURGESS JUNCTION 7880 10.2 7.0 146 18.9 16.9 113 CLOUD PEAK RESERVOIR 9860 22.9 12.5 184 26.0 20.2 130 DOME LAKE 8880 -M 7.3 * 18.7 19.2 98 GRAVE SPRINGS 8550 7.0 6.8 103 19.0 15.1 126 HANSEN SAWMILL 8760 .3 2.5 9 18.0 12.4 147 MIDDLE POWDER 7760 14.0 8.6 162 22.9 17.4 133 POWDER RIVER PASS 9480 11.0 3.9 280 22.9 17.2 134 SUCKER CREEK 8880 14.1 7.5 189 23.4 19.4 121 TIE CREEK 6870 .9 -M * 19.4 16.2 121 ----- ----- Basin wide percent of average 165 125 BELLE FOURCHE BLIND PARK 6890 .2 2.5 5 21.4 17.0 126 NORTH RAPID CREEK 6130 .0 -M * 18.2 -M * WARREN PEAK 6520 .0 2.5 0 -M 12.5 * ----- ----- Basin wide percent of average 3 126* UPPER N. PLATTE RIVER COLUMBINE 9400 4.8 8.9 54 30.2 30.2 101 DIVIDE PEAK 8800 12.4 8.0 154 32.8 29.9 110 ELK RIVER 8700 1.9 4.6 40 29.9 23.9 126 JOE WRIGHT 10120 21.7 20.7 105 34.4 33.7 103 NORTH FRENCH CREEK 10100 40.9 23.7 173 39.9 31.2 129 OLD BATTLE 10000 38.3 30.9 124 48.8 38.5 127 SOUTH BRUSH CREEK 8400 7.8 3.7 217 27.4 22.7 121 TOWER 10500 -M 47.8 * -M 47.8 * WEBBER SPRINGS 9200 14.5 15.9 92 35.3 32.9 107 WILLOW CREEK PASS 9540 11.1 6.8 164 17.2 17.5 98 ----- ----- Basin wide percent of average 125 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.2 19.4 125 33.0 26.2 126 CASPER MTN. 7900 4.5 7.6 60 23.9 21.9 110 DEADMAN HILL 10220 18.4 14.7 126 24.9 23.7 106 DEER PARK 9700 25.4 -M * 34.2 -M * LAPRELE CREEK 8320 .0 2.3 0 22.0 17.2 128 RENO HILL 8400 7.1 6.0 119 27.2 23.9 114 ROACH 9700 -M 12.0 * 26.9 29.0 93 SAND LAKE 10080 46.3 30.4 152 39.7 27.4 145 SOUTH PASS 9040 21.4 13.5 159 31.2 23.2 136 WINDY PEAK 7840 .0 1.9 0 19.0 14.7 130 ----- ----- Basin wide percent of average 128 120 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .2 .0 * 24.0 20.4 119 DIVIDE PEAK 8800 12.4 8.0 154 32.8 29.9 110 OLD BATTLE 10000 38.3 30.9 124 48.8 38.5 127 SANDSTONE RS 8150 .0 1.4 0* 27.0 25.2 108 WHISKEY PARK 8950 26.9 19.2 141 39.7 37.2 107 ----- ----- Basin wide percent of average 131 114 UPPER GREEN RIVER BIG SANDY OPENING 9100 10.2 5.3 197 19.7 20.0 99 BLIND BULL SUM 8650 31.9 19.7 163 28.7 28.9 100 EAST RIM DIVIDE 7930 11.5 10.1 114 18.4 18.7 99 ELKHART PARK G.S. 9400 12.6 7.3 173 19.9 19.7 102 GROS VENTRE SUMMIT 8775 -M 5.5 * -M 19.7 * KENDALL R.S. 7740 4.1 .0 * 20.5 19.2 108 LOOMIS PARK 8240 -M 6.0 * 25.4 23.2 110 NEW FORK LAKE 8340 5.8 3.3 173 17.0 17.9 96 SNIDER BASIN 8250 11.4 4.5 252 23.2 18.7 125 SPRING CREEK DIVIDE 9000 35.5 22.9 156 36.3 33.0 111 TRIPLE PEAK 8500 25.2 18.2 138 39.3 37.8 104 ----- ----- Basin wide percent of average 158 105 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 * 18.4 16.5 111 HEWINTA 9500 8.5 .0 * 20.5 18.4 113 HICKERSON PARK 9150 .0 .5 0* 15.5 14.5 108 HOLE-IN-ROCK 9150 1.5 .5 375* 16.0 14.5 111 INDIAN CREEK 9425 34.3 21.4 161 34.9 31.4 112 KELLEY R.S. 8180 10.0 5.3 187 24.9 23.2 108 STEEL CREEK PARK 10100 22.4 14.5 155 24.7 18.9 131 ----- ----- Basin wide percent of average 163* 113 UPPER BEAR RIVER BUG LAKE 7950 16.7 6.5 257 29.7 24.4 123 HAYDEN FORK 9400 8.6 .5 2150* 29.4 25.4 116 KELLEY R.S. 8180 10.0 5.3 187 24.9 23.2 108 LILY LAKE 9050 8.2 3.5 235 25.5 20.4 126 MONTE CRISTO 8960 36.3 16.4 223 38.7 32.8 118 SALT RIVER SUMMIT 7600 4.5 .0 * 22.9 20.9 111 TRIAL LAKE 9960 25.2 16.9 150 31.7 30.9 103 ----- ----- Basin wide percent of average 215 115 ----------------------------------------------------------------------------- -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.