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: MAY 21 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.2 3.1 297 39.2 26.9 146 COTTONWOOD CREEK 7600 15.8 9.1 174 40.4 30.1 134 GRANITE CREEK 6770 13.5 5.3 255 35.9 28.7 125 GRASSY LAKE 7265 27.5 21.8 126 61.9 44.7 138 GROS VENTRE SUMMIT 8775 12.9 6.5 198 23.4 19.4 121 LEWIS LAKE DIVIDE 7860 38.6 26.1 148 64.6 45.5 142 PHILLIPS BENCH 8200 32.5 22.6 144 51.6 35.9 144 SALT RIVER SUMMIT 7600 .5 .0 * 27.6 20.6 134 SNAKE RIVER STATION 6920 .4 7.4 5 41.5 31.4 132 SPRING CREEK DIVIDE 9000 27.3 23.5 116 37.7 32.7 115 THUMB DIVIDE 7980 12.2 7.2 169 38.0 25.2 151 TOGWOTEE PASS 9580 28.3 25.2 112 40.3 34.1 118 TWO OCEAN PLATEAU 9360 41.3 25.0 165 -M 37.1 * WILLOW CREEK 8450 29.0 24.8 117 54.8 38.7 142 ----- ----- Basin wide percent of average 139 135 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 23.0 * 35.5 23.7 150 BLACK BEAR 7950 -M 33.6 * -M 49.1 * CANYON 7940 8.4 4.7 179 29.9 18.0 166 FISHER CREEK 9100 51.5 35.4 145 -M 45.3 * MADISON PLATEAU 7750 25.3 14.9 170 46.7 32.1 145 NORTHEAST ENTRANCE 7350 .2 1.8 11 23.6 15.6 151 PARKER PEAK 9400 29.1 21.3 137 28.4 20.3 140 SYLVAN LAKE 8420 -M 18.3 * 37.6 24.9 151 THUMB DIVIDE 7980 12.2 7.2 169 38.0 25.2 151 TWO OCEAN PLATEAU 9360 41.3 25.0 165 -M 37.1 * WHISKEY CREEK 6800 10.9 6.6 165 35.6 26.6 134 WHITE MILL 8700 34.9 23.0 152 36.8 35.2 105 WOLVERINE 7650 .4 1.9 21 19.6 17.1 115 ----- ----- Basin wide percent of average 151 139 WIND RIVER BURROUGHS CREEK 8750 13.4 5.2 258 29.4 21.4 137 CHRISTINA LAKE 9980 16.4 14.6 112 27.9 22.3 125 COLD SPRINGS 9630 .2 1.9 11 16.9 15.0 113 HOBBS PARK 10100 16.7 14.2 118 19.8 19.6 101 LITTLE WARM 9620 5.7 3.7 154 25.8 18.2 142 SOUTH PASS 9040 16.5 14.2 116 30.2 22.8 132 ST. LAWRENCE ALT 8620 .0 1.6 0 16.4 14.0 117 TOGWOTEE PASS 9580 28.3 25.2 112 40.3 34.1 118 TOWNSEND CREEK 8700 .7 4.6 15 18.4 17.5 105 ----- ----- Basin wide percent of average 115 122 BIGHORN BASIN BALD MTN. 9375 20.8 22.3 93 23.0 23.7 97 BEAR TRAP MEADOW 7900 .2 .9 22 13.5 12.7 106 BLACKWATER 9780 -M 22.7 * 34.6 22.8 152 BONE SPRINGS DIV 9350 17.6 13.6 129 22.0 20.7 106 EVENING STAR 9200 35.2 28.6 123 46.9 28.5 165 GRAVE SPRINGS 8550 2.6 -M * 14.9 14.9 100 KIRWIN 9550 -M 8.3 * -M 15.2 * LOST CREEK 8080 15.5 10.8 144 21.0 17.5 120 MARQUETTE 8760 6.6 6.4 103 16.8 16.0 105 MIDDLE POWDER 7760 8.7 9.9 88 19.3 17.0 114 OWL CREEK 8975 .2 .7 29 9.7 9.8 99 POWDER RIVER PASS 9480 10.6 4.5 236 19.1 17.0 112 SHELL CREEK 9580 15.3 15.0 102 19.8 18.4 108 SYLVAN LAKE 8420 -M 18.3 * 37.6 24.9 151 SYLVAN ROAD 8120 .2 2.9 7 30.6 20.7 148 TIMBER CREEK 7950 .2 1.7 12 11.6 12.5 93 YOUNTS PEAK 8350 18.2 13.4 136 -M 21.2 * ----- ----- Basin wide percent of average 114 123 SHOSHONE RIVER BLACKWATER 9780 -M 22.7 * 34.6 22.8 152 EVENING STAR 9200 35.2 28.6 123 46.9 28.5 165 KIRWIN 9550 -M 8.3 * -M 15.2 * MARQUETTE 8760 6.6 6.4 103 16.8 16.0 105 SYLVAN LAKE 8420 -M 18.3 * 37.6 24.9 151 SYLVAN ROAD 8120 .2 2.9 7 30.6 20.7 148 YOUNTS PEAK 8350 18.2 13.4 136 -M 21.2 * ----- ----- Basin wide percent of average 117 147 POWDER-TONGUE BEAR TRAP MEADOW 7900 .2 .9 22 13.5 12.7 106 BONE SPRINGS DIV 9350 17.6 13.6 129 22.0 20.7 106 BURGESS JUNCTION 7880 9.8 8.0 123 18.4 16.5 112 CLOUD PEAK RESERVOIR 9860 16.6 13.3 125 21.3 19.8 108 DOME LAKE 8880 8.1 8.0 101 20.5 18.9 108 GRAVE SPRINGS 8550 2.6 -M * 14.9 14.9 100 HANSEN SAWMILL 8760 .0 2.9 0 12.8 12.0 107 LOST CREEK 8080 15.5 10.8 144 21.0 17.5 120 MIDDLE POWDER 7760 8.7 9.9 88 19.3 17.0 114 POWDER RIVER PASS 9480 10.6 4.5 236 19.1 17.0 112 SUCKER CREEK 8880 12.7 8.2 155 22.7 19.1 119 TIE CREEK 6870 .1 -M * 18.3 15.9 115 ----- ----- Basin wide percent of average 125 111 BELLE FOURCHE BLIND PARK 6890 .0 3.0 0 20.3 16.6 122 NORTH RAPID CREEK 6130 .0 -M * 18.8 -M * WARREN PEAK 6520 5.5 3.0 183 15.6 12.2 128 ----- ----- Basin wide percent of average 92 125 UPPER N. PLATTE RIVER COLUMBINE 9400 7.7 10.1 76 38.9 29.9 130 DIVIDE PEAK 8800 9.0 9.1 99 29.7 29.6 100 ELK RIVER 8700 6.0 5.6 107 31.4 23.6 133 JOE WRIGHT 10120 23.9 21.4 112 38.1 33.3 114 NORTH FRENCH CREEK 10100 30.1 24.4 123 36.7 30.8 119 OLD BATTLE 10000 42.9 32.3 133 46.8 38.2 123 SOUTH BRUSH CREEK 8400 .0 4.2 0 22.4 22.3 100 TOWER 10500 57.9 48.5 119 59.9 47.2 127 WEBBER SPRINGS 9200 19.8 16.9 117 42.7 32.6 131 WILLOW CREEK PASS 9540 15.1 7.7 196 20.8 17.3 120 ----- ----- Basin wide percent of average 118 121 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.5 20.6 124 35.1 25.9 136 CASPER MTN. 7900 13.1 8.5 154 27.6 21.4 129 CHRISTINA LAKE 9980 16.4 14.6 112 27.9 22.3 125 DEADMAN HILL 10220 17.3 15.6 111 25.1 23.4 107 LAPRELE CREEK 8320 .1 2.6 4 18.7 16.9 111 RENO HILL 8400 12.1 6.6 183 26.9 23.6 114 ROACH 9700 15.9 13.0 122 28.2 28.6 99 SAND LAKE 10080 38.6 31.6 122 36.9 27.1 136 SOUTH PASS 9040 16.5 14.2 116 30.2 22.8 132 WINDY PEAK 7840 .2 2.3 9 14.5 14.5 100 ----- ----- Basin wide percent of average 120 120 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .3 .0 * -M 20.0 * DIVIDE PEAK 8800 9.0 9.1 99 29.7 29.6 100 OLD BATTLE 10000 42.9 32.3 133 46.8 38.2 123 SANDSTONE RS 8150 .0 1.5 0* 26.4 24.9 106 WHISKEY PARK 8950 34.4 20.6 167 41.2 36.8 112 ----- ----- Basin wide percent of average 136 111 UPPER GREEN RIVER BIG SANDY OPENING 9100 1.6 6.3 25 19.8 19.9 99 BLIND BULL SUM 8650 44.7 20.3 220 37.5 28.6 131 EAST RIM DIVIDE 7930 6.2 10.7 58 18.9 18.5 102 ELKHART PARK G.S. 9400 6.6 7.9 84 21.4 19.5 110 GROS VENTRE SUMMIT 8775 12.9 6.5 198 23.4 19.4 121 KENDALL R.S. 7740 2.1 .0 * 25.3 19.0 133 LOOMIS PARK 8240 -M 7.3 * 30.2 22.9 132 NEW FORK LAKE 8340 .1 4.0 3 16.3 17.6 93 SNIDER BASIN 8250 2.6 5.5 47 21.9 18.5 118 SPRING CREEK DIVIDE 9000 27.3 23.5 116 37.7 32.7 115 TRIPLE PEAK 8500 18.6 18.9 98 44.2 37.5 118 ----- ----- Basin wide percent of average 116 117 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 100* 19.2 16.3 118 HEWINTA 9500 .0 .0 100* 17.3 18.0 96 HICKERSON PARK 9150 .0 .4 0* 12.6 14.2 89 HOLE-IN-ROCK 9150 .1 .4 25* 12.9 14.2 91 INDIAN CREEK 9425 29.3 22.3 131 37.2 31.2 119 KELLEY R.S. 8180 6.1 6.5 94 35.5 22.9 155 STEEL CREEK PARK 10100 13.2 15.0 88 20.0 18.5 108 ----- ----- Basin wide percent of average 109* 114 UPPER BEAR RIVER BUG LAKE 7950 16.1 7.3 221 34.6 24.1 144 HAYDEN FORK 9400 .5 .5 100* 30.2 25.1 120 KELLEY R.S. 8180 6.1 6.5 94 35.5 22.9 155 LILY LAKE 9050 .2 4.0 5 23.9 20.0 120 MONTE CRISTO 8960 23.5 17.6 134 39.4 32.5 121 SALT RIVER SUMMIT 7600 .5 .0 * 27.6 20.6 134 TRIAL LAKE 9960 23.5 17.8 132 39.5 30.5 130 ----- ----- Basin wide percent of average 130 131 ----------------------------------------------------------------------------- -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.