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 9 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 13.6 7.5 184 29.9 25.9 116 COTTONWOOD CREEK 7600 22.7 16.7 137 34.4 29.0 119 GRANITE CREEK 6770 14.7 9.9 150 27.2 27.7 99 GRASSY LAKE 7265 39.5 30.2 132 48.0 43.2 112 GROS VENTRE SUMMIT 8775 -M 11.9 * -M 18.7 * LEWIS LAKE DIVIDE 7860 38.7 31.7 122 44.8 43.8 103 PHILLIPS BENCH 8200 34.5 27.2 127 36.5 34.7 106 SALT RIVER SUMMIT 7600 12.1 4.8 258 21.9 19.9 111 SNAKE RIVER STATION 6920 12.0 13.6 89 29.4 30.2 98 SPRING CREEK DIVIDE 9000 37.3 27.7 135 34.9 31.7 111 THUMB DIVIDE 7980 17.4 13.0 135 25.7 24.4 106 TOGWOTEE PASS 9580 -M 27.0 * 33.8 32.8 104 TWO OCEAN PLATEAU 9360 40.8 26.9 152 35.8 35.8 101 WILLOW CREEK 8450 31.7 29.7 107 46.4 37.3 125 ----- ----- Basin wide percent of average 133 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.7 25.4 113 27.7 22.2 125 BLACK BEAR 7950 54.5 38.3 143 52.8 47.7 111 CANYON 7940 13.1 8.5 156 21.4 17.0 126 FISHER CREEK 9100 40.3 38.0 106 42.3 43.5 98 MADISON PLATEAU 7750 -M 21.0 * 36.8 30.9 120 NORTHEAST ENTRANCE 7350 3.3 4.1 79 16.7 14.6 115 PARKER PEAK 9400 26.4 23.2 114 -M 19.2 * SYLVAN LAKE 8420 24.4 22.0 111 32.0 23.4 137 THUMB DIVIDE 7980 17.4 13.0 135 25.7 24.4 106 TWO OCEAN PLATEAU 9360 40.8 26.9 152 35.8 35.8 101 WHISKEY CREEK 6800 19.0 12.0 159 28.4 25.7 111 WHITE MILL 8700 30.4 25.5 119 28.9 33.8 86 WOLVERINE 7650 3.7 5.3 70 15.2 16.0 95 ----- ----- Basin wide percent of average 125 109 WIND RIVER BURROUGHS CREEK 8750 18.2 9.5 192 22.0 20.2 109 COLD SPRINGS 9630 18.7 4.6 407 23.7 14.0 171 DEER PARK 9700 25.7 -M * 32.4 -M * HOBBS PARK 10100 29.9 17.4 172 27.5 18.4 151 LITTLE WARM 9620 20.0 7.6 264 23.9 17.2 140 SOUTH PASS 9040 24.4 17.2 142 30.0 21.5 140 ST. LAWRENCE ALT 8620 13.5 3.8 363 20.9 13.1 160 TOGWOTEE PASS 9580 -M 27.0 * 33.8 32.8 104 TOWNSEND CREEK 8700 18.9 7.6 249 25.7 16.4 157 ----- ----- Basin wide percent of average 213 136 BIGHORN BASIN BALD MTN. 9375 23.7 24.4 98 23.4 22.0 106 BEAR TRAP MEADOW 7900 .9 2.8 30 15.2 11.5 133 BLACKWATER 9780 35.3 25.2 141 29.4 21.5 137 BONE SPRINGS DIV 9350 20.9 17.4 120 22.7 19.2 119 EVENING STAR 9200 36.0 30.7 118 39.9 27.0 148 GRAVE SPRINGS 8550 11.2 11.4 100 17.7 13.5 133 KIRWIN 9550 17.4 10.9 161 20.4 14.1 144 MARQUETTE 8760 16.7 8.1 207 19.4 14.5 134 MIDDLE POWDER 7760 16.9 14.5 117 23.4 15.7 149 OWL CREEK 8975 10.7 2.2 510 -M 8.9 * POWDER RIVER PASS 9480 11.6 8.1 144 20.7 15.7 132 SHELL CREEK 9580 18.2 17.0 107 19.0 17.0 112 SYLVAN LAKE 8420 24.4 22.0 111 32.0 23.4 137 SYLVAN ROAD 8120 8.2 5.8 144 21.9 19.5 112 TIMBER CREEK 7950 10.4 4.0 258 16.4 11.0 149 YOUNTS PEAK 8350 21.0 16.9 125 21.7 20.2 108 ----- ----- Basin wide percent of average 129 129 SHOSHONE RIVER BLACKWATER 9780 35.3 25.2 141 29.4 21.5 137 EVENING STAR 9200 36.0 30.7 118 39.9 27.0 148 KIRWIN 9550 17.4 10.9 161 20.4 14.1 144 MARQUETTE 8760 16.7 8.1 207 19.4 14.5 134 SYLVAN LAKE 8420 24.4 22.0 111 32.0 23.4 137 SYLVAN ROAD 8120 8.2 5.8 144 21.9 19.5 112 YOUNTS PEAK 8350 21.0 16.9 125 21.7 20.2 108 ----- ----- Basin wide percent of average 134 132 POWDER-TONGUE BEAR TRAP MEADOW 7900 .9 2.8 30 15.2 11.5 133 BIG GOOSE 7990 9.5 -M * 17.7 -M * BONE SPRINGS DIV 9350 20.9 17.4 120 22.7 19.2 119 BURGESS JUNCTION 7880 11.0 12.2 90 16.7 15.4 110 CLOUD PEAK RESERVOIR 9860 24.2 16.9 145 24.2 18.2 133 DOME LAKE 8880 -M 12.5 * 17.0 17.4 98 GRAVE SPRINGS 8550 11.2 11.4 100 17.7 13.5 133 HANSEN SAWMILL 8760 4.5 5.3 84 16.4 11.0 150 MIDDLE POWDER 7760 16.9 14.5 117 23.4 15.7 149 POWDER RIVER PASS 9480 11.6 8.1 144 20.7 15.7 132 SUCKER CREEK 8880 14.0 12.0 116 20.4 17.7 116 TIE CREEK 6870 -M -M * -M 14.7 * ----- ----- Basin wide percent of average 115 126 BELLE FOURCHE BLIND PARK 6890 .2 6.8 2 18.5 15.0 124 NORTH RAPID CREEK 6130 .3 -M * 16.9 -M * WARREN PEAK 6520 1.7 6.8 24 -M 11.1 * ----- ----- Basin wide percent of average 13 124* UPPER N. PLATTE RIVER COLUMBINE 9400 16.7 17.7 95 29.4 28.9 102 DIVIDE PEAK 8800 21.2 15.5 137 31.4 28.4 111 ELK RIVER 8700 12.5 12.0 105 28.4 22.9 125 JOE WRIGHT 10120 23.7 24.2 98 32.8 31.5 104 NORTH FRENCH CREEK 10100 41.3 27.9 149 39.8 29.2 137 OLD BATTLE 10000 39.5 37.5 106 46.2 36.8 126 SOUTH BRUSH CREEK 8400 10.2 8.0 128 25.4 21.4 120 TOWER 10500 57.2 51.0 112 48.8 44.9 109 WEBBER SPRINGS 9200 21.2 22.9 93 33.5 31.5 107 WILLOW CREEK PASS 9540 15.5 12.0 129 15.7 16.2 97 ----- ----- Basin wide percent of average 114 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 -M 26.7 * -M 24.7 * CASPER MTN. 7900 13.0 14.1 92 22.7 19.9 115 DEADMAN HILL 10220 22.4 18.9 118 23.7 22.2 108 DEER PARK 9700 25.7 -M * 32.4 -M * LAPRELE CREEK 8320 .0 4.8 0 20.5 15.6 132 RENO HILL 8400 15.0 10.7 141 26.2 22.9 115 ROACH 9700 -M 17.0 * 25.7 27.0 96 SAND LAKE 10080 46.3 36.3 128 37.5 25.9 146 SOUTH PASS 9040 24.4 17.2 142 30.0 21.5 140 WINDY PEAK 7840 3.2 5.5 58 18.7 13.2 141 ----- ----- Basin wide percent of average 116 122 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .2 2.2 5 22.7 19.2 119 DIVIDE PEAK 8800 21.2 15.5 137 31.4 28.4 111 OLD BATTLE 10000 39.5 37.5 106 46.2 36.8 126 SANDSTONE RS 8150 3.9 5.6 70 25.5 23.9 108 WHISKEY PARK 8950 31.9 27.2 117 37.4 35.3 107 ----- ----- Basin wide percent of average 110 114 UPPER GREEN RIVER BIG SANDY OPENING 9100 14.6 11.6 126 18.7 19.2 98 BLIND BULL SUM 8650 32.3 22.7 143 27.4 27.7 99 EAST RIM DIVIDE 7930 14.6 13.7 107 17.7 17.9 100 ELKHART PARK G.S. 9400 15.6 11.7 134 18.9 18.9 100 GROS VENTRE SUMMIT 8775 -M 11.9 * -M 18.7 * KENDALL R.S. 7740 10.2 4.6 222 19.9 18.2 109 LOOMIS PARK 8240 -M 13.0 * 24.4 22.2 110 NEW FORK LAKE 8340 11.1 7.5 148 15.7 16.9 93 SNIDER BASIN 8250 18.5 10.5 177 22.4 17.9 126 SPRING CREEK DIVIDE 9000 37.3 27.7 135 34.9 31.7 111 TRIPLE PEAK 8500 30.9 22.9 135 37.7 36.0 105 ----- ----- Basin wide percent of average 140 106 LOWER GREEN RIVER HAMS FORK 7840 7.5 2.5 300 17.9 15.7 114 HEWINTA 9500 12.0 2.3 522 18.9 17.0 112 HICKERSON PARK 9150 5.0 1.7 313 14.4 13.1 110 HOLE-IN-ROCK 9150 7.8 1.4 600 14.7 13.1 113 INDIAN CREEK 9425 37.8 26.7 142 33.3 30.0 112 KELLEY R.S. 8180 15.5 12.2 128 23.7 22.0 108 STEEL CREEK PARK 10100 21.4 17.7 122 22.7 17.2 133 ----- ----- Basin wide percent of average 167 114 UPPER BEAR RIVER BUG LAKE 7950 24.9 12.7 197 28.4 23.2 123 HAYDEN FORK 9400 13.6 3.3 413 27.7 23.9 116 KELLEY R.S. 8180 15.5 12.2 128 23.7 22.0 108 LILY LAKE 9050 12.4 7.0 176 23.7 18.9 125 MONTE CRISTO 8960 40.0 23.9 169 36.5 31.2 117 SALT RIVER SUMMIT 7600 12.1 4.8 258 21.9 19.9 111 TRIAL LAKE 9960 27.7 22.4 125 30.2 29.2 104 ----- ----- Basin wide percent of average 170 115 ----------------------------------------------------------------------------- -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.