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 MONDAY: APRIL 26 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 19.9 12.5 160 28.9 24.9 116 COTTONWOOD CREEK 7600 24.9 21.2 118 31.0 27.9 112 GRANITE CREEK 6770 19.7 14.5 136 24.4 26.4 93 GRASSY LAKE 7265 42.8 35.3 122 44.8 41.3 109 GROS VENTRE SUMMIT 8775 16.9 14.6 116 17.4 17.9 97 LEWIS LAKE DIVIDE 7860 41.0 35.3 117 42.8 42.0 102 PHILLIPS BENCH 8200 35.3 30.0 118 34.3 33.3 104 SALT RIVER SUMMIT 7600 16.0 11.9 136 20.4 18.9 108 SNAKE RIVER STATION 6920 19.0 17.2 112 27.9 29.0 96 SPRING CREEK DIVIDE 9000 34.3 29.7 116 31.7 30.4 105 THUMB DIVIDE 7980 -M 16.0 * -M 23.4 * TOGWOTEE PASS 9580 -M 27.9 * 31.7 31.5 101 TWO OCEAN PLATEAU 9360 40.5 27.4 149 34.3 34.3 101 WILLOW CREEK 8450 33.3 31.9 105 41.7 35.8 117 ----- ----- Basin wide percent of average 123 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 28.5 25.9 111 26.0 20.9 125 BLACK BEAR 7950 -M 40.0 * 49.0 45.8 108 CANYON 7940 16.9 11.9 144 20.7 16.0 129 FISHER CREEK 9100 37.8 38.5 99 39.4 41.4 96 MADISON PLATEAU 7750 -M 24.4 * 34.3 29.4 117 NORTHEAST ENTRANCE 7350 8.9 7.0 128 15.1 13.6 112 PARKER PEAK 9400 27.4 23.7 117 -M 17.9 * SYLVAN LAKE 8420 27.7 23.9 116 30.7 21.9 141 THUMB DIVIDE 7980 -M 16.0 * -M 23.4 * TWO OCEAN PLATEAU 9360 40.5 27.4 149 34.3 34.3 101 WHISKEY CREEK 6800 21.7 16.2 134 26.2 24.5 107 WHITE MILL 8700 29.4 26.2 113 26.7 32.0 84 WOLVERINE 7650 12.0 9.4 128 14.4 15.0 96 ----- ----- Basin wide percent of average 120 108 WIND RIVER BURROUGHS CREEK 8750 18.2 13.7 133 19.9 19.0 105 COLD SPRINGS 9630 -M 7.5 * 18.2 12.7 143 DEER PARK 9700 25.2 -M * 28.7 -M * HOBBS PARK 10100 27.4 17.7 156 24.2 16.9 145 LITTLE WARM 9620 17.7 11.5 156 19.9 16.0 126 SOUTH PASS 9040 24.9 18.0 139 26.2 20.2 131 ST. LAWRENCE ALT 8620 -M 6.0 * -M 12.2 * TOGWOTEE PASS 9580 -M 27.9 * 31.7 31.5 101 TOWNSEND CREEK 8700 -M 9.9 * -M 15.1 * ----- ----- Basin wide percent of average 146* 121 BIGHORN BASIN BALD MTN. 9375 22.7 23.7 97 21.2 20.4 105 BEAR TRAP MEADOW 7900 2.8 5.1 55 13.0 10.4 126 BLACKWATER 9780 34.5 25.4 136 28.0 20.2 139 BONE SPRINGS DIV 9350 20.9 18.4 114 20.7 17.7 117 EVENING STAR 9200 36.3 30.4 120 37.9 25.4 150 GRAVE SPRINGS 8550 11.5 11.4 102 15.4 12.0 128 KIRWIN 9550 15.6 11.6 135 17.7 13.0 138 MARQUETTE 8760 15.5 8.7 179 16.5 13.0 128 MIDDLE POWDER 7760 18.5 14.5 128 20.9 14.5 145 OWL CREEK 8975 9.1 3.9 234 9.7 7.8 125 POWDER RIVER PASS 9480 13.5 11.0 123 18.0 14.2 127 SHELL CREEK 9580 18.7 16.9 111 17.7 15.5 114 SYLVAN LAKE 8420 27.7 23.9 116 30.7 21.9 141 SYLVAN ROAD 8120 -M 9.0 * -M 18.4 * TIMBER CREEK 7950 9.6 6.3 155 12.6 9.6 132 YOUNTS PEAK 8350 21.9 18.4 119 20.7 18.9 110 ----- ----- Basin wide percent of average 122 129 SHOSHONE RIVER BLACKWATER 9780 34.5 25.4 136 28.0 20.2 139 EVENING STAR 9200 36.3 30.4 120 37.9 25.4 150 KIRWIN 9550 15.6 11.6 135 17.7 13.0 138 MARQUETTE 8760 15.5 8.7 179 16.5 13.0 128 SYLVAN LAKE 8420 27.7 23.9 116 30.7 21.9 141 SYLVAN ROAD 8120 -M 9.0 * -M 18.4 * YOUNTS PEAK 8350 21.9 18.4 119 20.7 18.9 110 ----- ----- Basin wide percent of average 128 136 POWDER-TONGUE BEAR TRAP MEADOW 7900 2.8 5.1 55 13.0 10.4 126 BIG GOOSE 7990 11.0 -M * 15.6 -M * BONE SPRINGS DIV 9350 20.9 18.4 114 20.7 17.7 117 BURGESS JUNCTION 7880 12.5 13.5 94 15.0 14.0 108 CLOUD PEAK RESERVOIR 9860 21.7 17.5 124 20.5 16.5 125 DOME LAKE 8880 -M 15.0 * 15.4 16.0 97 GRAVE SPRINGS 8550 11.5 11.4 102 15.4 12.0 128 HANSEN SAWMILL 8760 6.8 7.3 95 13.0 10.0 130 MIDDLE POWDER 7760 18.5 14.5 128 20.9 14.5 145 POWDER RIVER PASS 9480 13.5 11.0 123 18.0 14.2 127 SUCKER CREEK 8880 14.7 13.7 108 18.2 16.0 114 TIE CREEK 6870 -M -M * -M 13.5 * ----- ----- Basin wide percent of average 110 121 BELLE FOURCHE BLIND PARK 6890 3.5 10.4 34 17.9 13.2 136 NORTH RAPID CREEK 6130 4.5 -M * 16.2 -M * WARREN PEAK 6520 10.9 10.4 105 13.1 10.0 132 ----- ----- Basin wide percent of average 70 134 UPPER N. PLATTE RIVER COLUMBINE 9400 18.2 22.9 80 26.4 27.7 96 DIVIDE PEAK 8800 22.2 20.2 111 29.2 26.7 110 ELK RIVER 8700 16.0 17.7 91 25.7 21.7 119 JOE WRIGHT 10120 23.4 24.7 95 30.2 29.5 103 NORTH FRENCH CREEK 10100 37.5 29.2 129 35.4 27.4 130 OLD BATTLE 10000 36.2 37.5 97 41.9 34.8 121 SOUTH BRUSH CREEK 8400 10.1 11.5 89 22.2 19.9 112 TOWER 10500 53.4 50.5 106 44.9 42.2 107 WEBBER SPRINGS 9200 22.2 26.9 83 30.9 29.9 104 WILLOW CREEK PASS 9540 14.7 13.5 109 14.0 15.0 94 ----- ----- Basin wide percent of average 100 110 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.5 29.0 78 28.7 23.2 124 CASPER MTN. 7900 15.5 18.2 86 21.0 18.2 117 DEADMAN HILL 10220 19.9 18.7 107 21.2 20.4 104 DEER PARK 9700 25.2 -M * 28.7 -M * LAPRELE CREEK 8320 .0 7.5 0 18.9 14.4 133 RENO HILL 8400 18.2 14.1 129 23.9 21.9 110 ROACH 9700 19.2 18.2 105 24.5 25.2 98 SAND LAKE 10080 44.2 36.8 120 35.5 24.2 148 SOUTH PASS 9040 24.9 18.0 139 26.2 20.2 131 WINDY PEAK 7840 8.6 8.5 103 16.4 11.9 139 ----- ----- Basin wide percent of average 103 121 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 7.5 6.8 109 20.9 18.0 117 DIVIDE PEAK 8800 22.2 20.2 111 29.2 26.7 110 OLD BATTLE 10000 36.2 37.5 97 41.9 34.8 121 SANDSTONE RS 8150 10.5 11.6 91 24.0 22.4 108 WHISKEY PARK 8950 30.7 30.0 103 34.4 33.2 104 ----- ----- Basin wide percent of average 101 112 UPPER GREEN RIVER BIG SANDY OPENING 9100 17.4 14.5 121 17.7 18.2 97 BLIND BULL SUM 8650 30.7 25.4 121 24.0 26.7 91 EAST RIM DIVIDE 7930 14.9 15.0 100 15.5 17.2 91 ELKHART PARK G.S. 9400 15.5 14.5 108 16.9 17.9 95 GROS VENTRE SUMMIT 8775 16.9 14.6 116 17.4 17.9 97 KENDALL R.S. 7740 14.5 11.5 128 18.2 17.4 105 LOOMIS PARK 8240 -M 15.7 * 22.2 21.2 105 NEW FORK LAKE 8340 13.2 9.6 138 13.9 16.2 86 SNIDER BASIN 8250 19.9 13.9 144 19.9 17.0 118 SPRING CREEK DIVIDE 9000 34.3 29.7 116 31.7 30.4 105 TRIPLE PEAK 8500 30.0 25.7 118 33.0 34.5 96 ----- ----- Basin wide percent of average 120 99 LOWER GREEN RIVER HAMS FORK 7840 12.7 5.8 219 15.0 15.0 100 HEWINTA 9500 12.5 6.5 191 16.7 15.9 106 HICKERSON PARK 9150 6.5 4.1 159 13.1 12.0 111 HOLE-IN-ROCK 9150 9.6 3.7 267 13.5 12.0 113 INDIAN CREEK 9425 35.5 29.4 121 29.9 28.9 104 KELLEY R.S. 8180 17.4 16.0 110 21.5 21.0 103 STEEL CREEK PARK 10100 18.2 18.7 98 20.2 15.6 129 ----- ----- Basin wide percent of average 134 109 UPPER BEAR RIVER BUG LAKE 7950 24.2 17.4 140 24.4 22.2 110 HAYDEN FORK 9400 12.9 8.0 161 23.2 22.4 104 KELLEY R.S. 8180 17.4 16.0 110 21.5 21.0 103 LILY LAKE 9050 12.7 10.1 126 20.9 17.5 120 MONTE CRISTO 8960 33.2 27.2 122 31.4 29.7 106 SALT RIVER SUMMIT 7600 16.0 11.9 136 20.4 18.9 108 TRIAL LAKE 9960 22.2 24.7 90 25.4 27.7 92 ----- ----- Basin wide percent of average 121 105 ----------------------------------------------------------------------------- -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.