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: APRIL 17 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.1 16.4 153 28.5 23.1 123 COTTONWOOD CREEK 7670 34.2 23.5 146 40.6 30.0 135 GRAND TARGHEE 9260 56.9 -M * 42.7 -M * GRANITE CREEK 6770 25.4 16.6 153 27.8 21.2 131 GRASSY LAKE 7265 45.8 36.9 124 47.7 38.8 123 GROS VENTRE SUMMIT 8750 17.8 14.6 122 17.9 14.2 126 GUNSIGHT PASS 9820 22.0 -M * 20.5 -M * LEWIS LAKE DIVIDE 7850 49.6 36.7 135 -M 39.7 * PHILLIPS BENCH 8200 38.0 30.7 124 38.2 31.4 122 SALT RIVER SUMMIT 7760 19.6 14.1 139 24.8 20.5 121 SNAKE RIVER STATION 6920 -M 17.0 * 30.8 24.2 127 SPRING CREEK DIVIDE 9000 40.7 28.7 142 37.0 28.7 129 THUMB DIVIDE 7980 25.9 18.4 141 23.7 20.6 115 TOGWOTEE PASS 9580 35.2 26.9 131 36.5 27.1 135 TWO OCEAN PLATEAU 9240 -M 30.8 * -M 30.2 * WILLOW CREEK 8380 43.7 31.9 137 47.4 35.2 135 ----- ----- Basin wide percent of average 136 127 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 30.8 25.5 121 29.4 22.0 134 BLACK BEAR 8170 52.9 41.1 129 51.1 43.7 117 CANYON 7870 19.9 13.6 146 21.5 16.7 129 FISHER CREEK 9100 -M 37.1 * -M 39.5 * MADISON PLATEAU 7750 34.5 26.0 133 36.5 29.1 125 NORTHEAST ENTRANCE 7350 16.2 10.3 157 18.1 13.8 131 PARKER PEAK 9400 34.5 23.5 147 -M 18.0 * SYLVAN LAKE 8420 29.4 24.2 121 33.0 23.0 143 THUMB DIVIDE 7980 25.9 18.4 141 23.7 20.6 115 TWO OCEAN PLATEAU 9240 -M 30.8 * -M 30.2 * WHISKEY CREEK 6800 23.2 17.7 131 26.6 22.8 117 WHITE MILL 8700 33.3 26.1 128 33.2 29.4 113 WOLVERINE 7650 17.0 10.7 159 17.0 14.1 121 ----- ----- Basin wide percent of average 134 123 WIND RIVER BURROUGHS CREEK 8750 19.5 15.1 129 20.3 17.9 113 CASTLE CREEK 8400 7.8 -M * 10.0 -M * COLD SPRINGS 9630 9.9 6.6 150 11.2 12.3 91 DEER PARK 9700 20.8 17.6 118 24.5 24.5 100 HOBBS PARK 10100 18.1 16.9 107 16.2 15.0 108 LITTLE WARM 9370 14.7 12.4 119 15.3 15.1 101 SOUTH PASS 9040 18.6 17.7 105 16.3 20.7 79 ST. LAWRENCE ALT 8620 6.0 7.1 85 9.6 10.4 92 TOGWOTEE PASS 9580 35.2 26.9 131 36.5 27.1 135 TOWNSEND CREEK 8700 10.0 9.7 103 13.0 13.7 95 ----- ----- Basin wide percent of average 118 104 BIGHORN BASIN BALD MTN. 9380 27.8 22.0 126 22.7 19.4 117 BEAR TRAP MEADOW 8200 10.1 4.4 230 10.4 9.6 108 BLACKWATER 9780 32.6 27.0 121 31.0 22.9 135 BONE SPRINGS DIV 9350 23.4 17.7 132 19.1 16.5 116 EVENING STAR 9200 38.6 32.2 120 -M 27.9 * GRAVE SPRINGS 8550 10.7 10.8 99 11.0 11.6 95 KIRWIN 9550 15.8 12.4 127 16.6 12.7 131 MARQUETTE 8760 5.7 -M * 8.7 11.7 74 MIDDLE POWDER 7760 11.8 14.0 84 12.5 14.1 89 OWL CREEK 8975 7.7 5.1 151 8.4 7.0 120 POWDER RIVER PASS 9480 17.2 11.8 146 20.4 14.1 145 SHELL CREEK 9580 20.3 16.2 125 18.3 15.1 121 SYLVAN LAKE 8420 29.4 24.2 121 33.0 23.0 143 SYLVAN ROAD 7120 17.7 11.6 153 24.4 19.2 127 TIMBER CREEK 7950 6.3 5.6 113 7.6 8.8 86 YOUNTS PEAK 8350 21.9 18.2 120 19.2 17.6 109 ----- ----- Basin wide percent of average 125 118 SHOSHONE RIVER BLACKWATER 9780 32.6 27.0 121 31.0 22.9 135 EVENING STAR 9200 38.6 32.2 120 -M 27.9 * KIRWIN 9550 15.8 12.4 127 16.6 12.7 131 MARQUETTE 8760 5.7 -M * 8.7 11.7 74 SYLVAN LAKE 8420 29.4 24.2 121 33.0 23.0 143 SYLVAN ROAD 7120 17.7 11.6 153 24.4 19.2 127 YOUNTS PEAK 8350 21.9 18.2 120 19.2 17.6 109 ----- ----- Basin wide percent of average 124 124 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.1 4.4 230 10.4 9.6 108 BIG GOOSE 7990 10.4 12.5 83 12.2 10.9 112 BONE SPRINGS DIV 9350 23.4 17.7 132 19.1 16.5 116 BURGESS JUNCTION 7880 13.1 13.2 99 14.0 13.8 101 CLOUD PEAK RESERVOIR 9860 19.0 15.4 123 18.0 15.0 120 DOME LAKE 8880 16.0 13.9 115 15.4 15.0 103 GRAVE SPRINGS 8550 10.7 10.8 99 11.0 11.6 95 HANSEN SAWMILL 8360 9.1 6.0 152 10.2 9.5 107 LITTLE GOOSE 8870 11.9 -M * 16.4 -M * MIDDLE POWDER 7760 11.8 14.0 84 12.5 14.1 89 POWDER RIVER PASS 9480 17.2 11.8 146 20.4 14.1 145 SOLDIER PARK 8720 10.1 -M * 11.1 -M * SUCKER CREEK 8880 15.4 13.4 115 17.0 15.5 110 TIE CREEK 6870 7.3 5.4 135 12.1 11.7 103 ----- ----- Basin wide percent of average 118 110 BELLE FOURCHE BLIND PARK 6890 9.5 7.4 128 18.1 12.6 144 COLE CANYON 5910 7.3 7.0 104 13.6 7.8 174 NORTH RAPID CREEK 6130 6.6 8.6 77 15.2 9.7 157 ----- ----- Basin wide percent of average 102 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 28.6 17.6 163 36.9 21.8 169 COLUMBINE 9160 36.6 24.4 150 38.9 27.5 141 DIVIDE PEAK 8880 28.0 20.9 134 32.5 22.6 144 ELK RIVER 8700 27.2 19.3 141 29.7 21.5 138 JOE WRIGHT 10120 38.3 23.9 160 40.3 27.6 146 NORTH FRENCH CREEK 10130 55.1 32.9 167 -M 27.2 * OLD BATTLE 10000 49.5 35.0 141 46.9 37.5 125 SAGE CREEK BASIN 7850 21.6 12.1 179 21.6 13.1 165 SOUTH BRUSH CREEK 8440 21.9 13.2 166 26.1 18.3 143 TOWER 10500 62.3 50.0 125 47.6 42.1 113 WEBBER SPRINGS 9250 34.9 26.1 134 40.4 29.2 138 WILLOW CREEK PASS 9540 22.9 13.8 166 20.4 14.3 143 ----- ----- Basin wide percent of average 148 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 36.9 26.8 138 33.6 24.7 136 CASPER MTN. 7900 12.1 17.0 71 16.3 17.0 96 DEADMAN HILL 10220 24.7 18.6 133 25.1 19.0 132 DEER PARK 9700 20.8 17.6 118 24.5 24.5 100 LAPRELE CREEK 8375 13.6 10.0 136 16.0 14.5 110 RENO HILL 8400 16.6 16.0 104 19.7 17.6 112 ROACH 9700 23.0 18.4 125 26.3 20.6 128 SAND LAKE 10050 43.9 35.3 124 -M 26.9 * SOUTH PASS 9040 18.6 17.7 105 16.3 20.7 79 WINDY PEAK 7900 10.8 7.7 140 14.9 12.0 124 ----- ----- Basin wide percent of average 119 113 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 8.2 * 18.0 17.4 103 DIVIDE PEAK 8880 28.0 20.9 134 32.5 22.6 144 OLD BATTLE 10000 49.5 35.0 141 46.9 37.5 125 SANDSTONE RS 8150 20.9 13.1 160 -M 20.3 * WHISKEY PARK 8950 -M 30.6 * -M 31.4 * ----- ----- Basin wide percent of average 143 126 UPPER GREEN RIVER BIG SANDY OPENING 9080 17.7 15.3 116 18.0 14.7 122 BLIND BULL SUM 8650 40.1 28.9 139 26.9 24.0 112 EAST RIM DIVIDE 7930 17.4 14.0 124 15.8 13.0 122 ELKHART PARK G.S. 9400 16.5 14.0 118 16.3 14.7 111 GROS VENTRE SUMMIT 8750 17.8 14.6 122 17.9 14.2 126 GUNSIGHT PASS 9820 22.0 -M * 20.5 -M * KENDALL R.S. 7740 14.3 13.3 108 17.8 15.6 114 LOOMIS PARK 8240 23.5 16.9 139 24.3 18.8 129 NEW FORK LAKE 8340 14.3 11.1 129 13.3 12.4 107 POCKET CREEK 9360 15.3 -M * 17.0 -M * SNIDER BASIN 8060 22.7 14.8 153 21.4 17.6 122 SPRING CREEK DIVIDE 9000 40.7 28.7 142 37.0 28.7 129 TRIPLE PEAK 8500 38.9 25.9 150 39.1 27.0 145 ----- ----- Basin wide percent of average 134 123 LOWER GREEN RIVER HAMS FORK 7840 15.9 9.6 166 17.0 13.5 126 HEWINTA 9519 14.4 12.1 119 19.7 16.4 120 HICKERSON PARK 9145 7.4 8.1 91 11.9 9.1 131 HOLE-IN-ROCK 9150 9.7 7.1 137 13.3 8.6 155 INDIAN CREEK 9425 36.1 29.6 122 30.5 27.9 109 KELLEY R.S. 8180 23.9 17.0 141 26.9 22.2 121 STEEL CREEK PARK 10200 20.7 17.5 118 23.1 18.6 124 ----- ----- Basin wide percent of average 127 122 UPPER BEAR RIVER BUG LAKE 7950 34.0 21.5 158 33.3 21.0 159 HAYDEN FORK 9212 26.8 16.3 164 33.5 23.3 144 KELLEY R.S. 8180 23.9 17.0 141 26.9 22.2 121 LILY LAKE 9156 24.8 14.3 173 25.4 19.6 130 MONTE CRISTO 8960 43.6 30.5 143 41.8 28.1 149 SALT RIVER SUMMIT 7760 19.6 14.1 139 24.8 20.5 121 TRIAL LAKE 9992 41.9 26.5 158 38.1 27.5 139 ----- ----- Basin wide percent of average 153 138 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Average Snow Water Equivalent and Total Precipitation values 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 1971-2000. 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.