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 18 , 1997 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.1 4.0 302 39.1 26.7 146 COTTONWOOD CREEK 7600 19.1 11.5 166 40.0 29.8 134 GRANITE CREEK 6770 15.2 6.3 241 35.8 28.4 126 GRASSY LAKE 7265 31.4 24.5 128 61.8 44.3 140 GROS VENTRE SUMMIT 8775 15.2 8.3 183 23.4 19.2 122 LEWIS LAKE DIVIDE 7860 43.0 27.9 154 64.5 45.1 143 PHILLIPS BENCH 8200 35.0 23.9 146 51.2 35.5 144 SALT RIVER SUMMIT 7600 4.9 .0 * 27.1 20.4 133 SNAKE RIVER STATION 6920 -M 9.5 * -M 31.1 * SPRING CREEK DIVIDE 9000 29.1 24.8 117 37.6 32.4 116 THUMB DIVIDE 7980 15.9 9.2 173 37.9 25.0 152 TOGWOTEE PASS 9580 29.4 25.6 115 40.2 33.8 119 TWO OCEAN PLATEAU 9360 43.4 25.6 170 -M 36.7 * WILLOW CREEK 8450 32.6 26.3 124 53.8 38.3 140 ----- ----- Basin wide percent of average 147 135 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 -M 23.9 * 35.5 23.3 152 BLACK BEAR 7950 -M 35.3 * -M 48.7 * CANYON 7940 11.3 5.6 202 29.9 17.7 169 FISHER CREEK 9100 -M 36.4 * -M 44.8 * MADISON PLATEAU 7750 28.5 16.9 169 46.5 31.8 146 NORTHEAST ENTRANCE 7350 1.2 2.2 55 23.5 15.3 154 PARKER PEAK 9400 31.9 22.0 145 -M 20.0 * SYLVAN LAKE 8420 -M 19.5 * 37.5 24.5 153 THUMB DIVIDE 7980 15.9 9.2 173 37.9 25.0 152 TWO OCEAN PLATEAU 9360 43.4 25.6 170 -M 36.7 * WHISKEY CREEK 6800 13.5 8.0 169 35.5 26.4 134 WHITE MILL 8700 36.9 23.9 154 -M 34.8 * WOLVERINE 7650 -M 2.5 * 19.0 16.8 113 ----- ----- Basin wide percent of average 161 147 WIND RIVER BURROUGHS CREEK 8750 16.1 6.0 268 29.3 21.1 139 CHRISTINA LAKE 9980 17.8 15.8 113 27.9 22.0 127 COLD SPRINGS 9630 -M 2.4 * 16.9 14.7 115 HOBBS PARK 10100 18.6 15.6 119 19.7 19.3 102 LITTLE WARM 9620 8.6 4.6 187 25.7 17.9 144 SOUTH PASS 9040 18.7 15.4 121 30.2 22.5 134 ST. LAWRENCE ALT 8620 -M 2.0 * 16.4 13.8 119 TOGWOTEE PASS 9580 29.4 25.6 115 40.2 33.8 119 TOWNSEND CREEK 8700 3.3 5.3 62 18.4 17.2 107 ----- ----- Basin wide percent of average 127 123 BIGHORN BASIN BALD MTN. 9375 21.9 23.4 94 23.0 23.3 99 BEAR TRAP MEADOW 7900 .1 1.2 8 13.3 12.4 107 BLACKWATER 9780 38.7 23.7 163 34.5 22.5 153 BONE SPRINGS DIV 9350 19.0 15.1 126 21.5 20.3 106 EVENING STAR 9200 -M 29.5 * 46.9 28.1 167 GRAVE SPRINGS 8550 4.7 -M * 14.8 14.5 102 KIRWIN 9550 10.1 9.2 110 20.5 14.9 138 LOST CREEK 8080 16.4 12.2 134 20.6 17.1 120 MARQUETTE 8760 8.5 7.0 121 16.4 15.6 105 MIDDLE POWDER 7760 10.6 12.0 88 19.0 16.7 114 OWL CREEK 8975 .2 .8 25 9.6 9.5 101 POWDER RIVER PASS 9480 11.3 5.3 213 18.4 16.6 111 SHELL CREEK 9580 -M 16.0 * 19.7 18.0 109 SYLVAN LAKE 8420 -M 19.5 * 37.5 24.5 153 SYLVAN ROAD 8120 2.1 3.5 60 30.7 20.4 150 TIMBER CREEK 7950 .1 2.1 5 11.5 12.1 95 YOUNTS PEAK 8350 20.4 14.6 140 -M 20.9 * ----- ----- Basin wide percent of average 123 125 SHOSHONE RIVER BLACKWATER 9780 38.7 23.7 163 34.5 22.5 153 EVENING STAR 9200 -M 29.5 * 46.9 28.1 167 KIRWIN 9550 10.1 9.2 110 20.5 14.9 138 MARQUETTE 8760 8.5 7.0 121 16.4 15.6 105 SYLVAN LAKE 8420 -M 19.5 * 37.5 24.5 153 SYLVAN ROAD 8120 2.1 3.5 60 30.7 20.4 150 YOUNTS PEAK 8350 20.4 14.6 140 -M 20.9 * ----- ----- Basin wide percent of average 138 148 POWDER-TONGUE BEAR TRAP MEADOW 7900 .1 1.2 8 13.3 12.4 107 BONE SPRINGS DIV 9350 19.0 15.1 126 21.5 20.3 106 BURGESS JUNCTION 7880 11.1 9.5 117 18.1 16.2 112 CLOUD PEAK RESERVOIR 9860 17.8 14.7 121 20.9 19.4 108 DOME LAKE 8880 9.6 9.2 104 19.9 18.5 108 GRAVE SPRINGS 8550 4.7 -M * 14.8 14.5 102 HANSEN SAWMILL 8760 .0 3.4 0 12.2 11.8 103 LOST CREEK 8080 16.4 12.2 134 20.6 17.1 120 MIDDLE POWDER 7760 10.6 12.0 88 19.0 16.7 114 POWDER RIVER PASS 9480 11.3 5.3 213 18.4 16.6 111 SUCKER CREEK 8880 13.9 9.4 148 22.1 18.7 118 TIE CREEK 6870 .2 -M * 18.0 15.6 115 ----- ----- Basin wide percent of average 119 111 BELLE FOURCHE BLIND PARK 6890 .0 3.8 0 20.0 16.2 123 NORTH RAPID CREEK 6130 .1 -M * 18.7 -M * WARREN PEAK 6520 7.9 3.8 208 -M 11.9 * ----- ----- Basin wide percent of average 104 123* UPPER N. PLATTE RIVER COLUMBINE 9400 12.1 12.1 100 38.7 29.6 131 DIVIDE PEAK 8800 12.9 10.8 119 29.6 29.2 101 ELK RIVER 8700 9.9 7.0 141 31.4 23.4 134 JOE WRIGHT 10120 29.4 22.5 131 37.9 32.8 116 NORTH FRENCH CREEK 10100 32.9 25.6 129 36.6 30.4 120 OLD BATTLE 10000 43.9 34.6 127 46.7 37.8 124 SOUTH BRUSH CREEK 8400 .0 5.0 0 21.9 22.1 99 TOWER 10500 60.5 49.7 122 59.8 46.6 128 WEBBER SPRINGS 9200 22.9 18.7 122 42.6 32.3 132 WILLOW CREEK PASS 9540 17.6 9.2 191 20.7 17.0 122 ----- ----- Basin wide percent of average 124 121 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 29.0 22.8 127 35.0 25.6 137 CASPER MTN. 7900 15.1 9.8 154 27.5 21.0 131 CHRISTINA LAKE 9980 17.8 15.8 113 27.9 22.0 127 DEADMAN HILL 10220 18.6 17.1 109 24.8 23.0 108 LAPRELE CREEK 8320 .0 3.0 0 18.6 16.6 112 RENO HILL 8400 14.7 7.6 193 26.8 23.4 115 ROACH 9700 19.0 14.5 131 28.2 28.2 100 SAND LAKE 10080 42.6 33.5 127 36.9 26.8 138 SOUTH PASS 9040 18.7 15.4 121 30.2 22.5 134 WINDY PEAK 7840 .2 2.9 7 14.3 14.1 101 ----- ----- Basin wide percent of average 123 121 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .3 .0 * -M 19.8 * DIVIDE PEAK 8800 12.9 10.8 119 29.6 29.2 101 OLD BATTLE 10000 43.9 34.6 127 46.7 37.8 124 SANDSTONE RS 8150 .0 1.9 0 26.3 24.6 107 WHISKEY PARK 8950 34.0 23.0 148 41.2 36.4 113 ----- ----- Basin wide percent of average 129 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 5.4 8.1 67 19.8 19.7 101 BLIND BULL SUM 8650 46.3 21.3 217 37.2 28.3 131 EAST RIM DIVIDE 7930 8.3 11.7 71 18.9 18.3 103 ELKHART PARK G.S. 9400 9.6 8.8 109 21.3 19.3 110 GROS VENTRE SUMMIT 8775 15.2 8.3 183 23.4 19.2 122 KENDALL R.S. 7740 6.2 .0 * 25.3 18.8 135 LOOMIS PARK 8240 -M 9.3 * 30.1 22.7 133 NEW FORK LAKE 8340 .3 5.1 6 16.2 17.4 93 SNIDER BASIN 8250 7.5 7.0 107 21.8 18.3 119 SPRING CREEK DIVIDE 9000 29.1 24.8 117 37.6 32.4 116 TRIPLE PEAK 8500 22.1 20.1 110 44.2 37.1 119 ----- ----- Basin wide percent of average 125 118 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 100* 19.1 16.1 119 HEWINTA 9500 .0 .0 100* 17.2 17.8 97 HICKERSON PARK 9150 .0 .5 0* 12.5 13.9 90 HOLE-IN-ROCK 9150 .1 .4 25* 12.9 13.9 93 INDIAN CREEK 9425 32.1 23.6 136 37.1 30.9 120 KELLEY R.S. 8180 9.3 8.2 113 35.3 22.7 156 STEEL CREEK PARK 10100 14.7 15.8 93 19.9 18.1 110 ----- ----- Basin wide percent of average 116* 115 UPPER BEAR RIVER BUG LAKE 7950 19.7 8.7 226 34.4 23.9 144 HAYDEN FORK 9400 .7 .6 117* 30.1 24.8 121 KELLEY R.S. 8180 9.3 8.2 113 35.3 22.7 156 LILY LAKE 9050 .2 4.9 4 23.9 19.7 121 MONTE CRISTO 8960 28.1 19.8 142 39.4 32.2 122 SALT RIVER SUMMIT 7600 4.9 .0 * 27.1 20.4 133 TRIAL LAKE 9960 25.9 19.4 134 39.1 30.2 129 ----- ----- Basin wide percent of average 136 132 ----------------------------------------------------------------------------- -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.