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 25 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.2 14.3 183 30.5 23.8 128 COTTONWOOD CREEK 7670 34.9 21.6 162 43.3 31.1 139 GRAND TARGHEE 9260 59.8 -M * 44.8 -M * GRANITE CREEK 6770 26.3 14.6 180 29.5 21.9 135 GRASSY LAKE 7265 48.1 35.3 136 50.0 40.0 125 GROS VENTRE SUMMIT 8750 18.5 14.1 131 18.7 14.8 126 GUNSIGHT PASS 9820 23.4 -M * 21.5 -M * LEWIS LAKE DIVIDE 7850 53.5 35.9 149 44.0 40.8 108 PHILLIPS BENCH 8200 39.2 30.4 129 40.7 32.4 126 SALT RIVER SUMMIT 7760 20.4 12.5 163 26.1 21.1 124 SNAKE RIVER STATION 6920 -M 14.6 * 32.4 25.0 130 SPRING CREEK DIVIDE 9000 43.3 28.9 150 39.1 29.6 132 THUMB DIVIDE 7980 28.5 16.7 171 25.9 21.4 121 TOGWOTEE PASS 9580 37.2 27.6 135 38.4 28.1 137 TWO OCEAN PLATEAU 9240 -M 31.6 * -M 31.2 * WILLOW CREEK 8380 47.1 31.6 149 50.3 36.6 137 ----- ----- Basin wide percent of average 149 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.8 25.7 124 30.4 22.8 133 BLACK BEAR 8170 55.2 40.6 136 53.3 44.9 119 CANYON 7870 21.0 12.3 171 22.4 17.3 129 FISHER CREEK 9100 49.8 37.7 132 -M 40.9 * MADISON PLATEAU 7750 36.1 25.3 143 37.8 29.9 126 NORTHEAST ENTRANCE 7350 17.1 8.4 204 19.0 14.4 132 PARKER PEAK 9400 36.7 24.2 152 -M 18.8 * SYLVAN LAKE 8420 31.7 23.9 133 35.2 24.0 147 THUMB DIVIDE 7980 28.5 16.7 171 25.9 21.4 121 TWO OCEAN PLATEAU 9240 -M 31.6 * -M 31.2 * WHISKEY CREEK 6800 23.2 16.5 141 27.9 23.6 118 WHITE MILL 8700 35.0 26.3 133 34.7 30.4 114 WOLVERINE 7650 -M 8.5 * 17.7 14.7 120 ----- ----- Basin wide percent of average 142 125 WIND RIVER BURROUGHS CREEK 8750 20.6 14.4 143 21.4 18.7 114 CASTLE CREEK 8400 8.2 -M * 10.4 -M * COLD SPRINGS 9630 9.8 5.1 192 11.6 13.2 88 DEER PARK 9700 21.9 19.5 112 25.5 25.9 98 HOBBS PARK 10100 18.8 17.6 107 16.7 16.0 104 LITTLE WARM 9370 15.5 11.8 131 16.2 16.1 101 SOUTH PASS 9040 19.3 18.1 107 16.8 21.8 77 ST. LAWRENCE ALT 8620 4.7 6.4 73 9.6 11.3 85 TOGWOTEE PASS 9580 37.2 27.6 135 38.4 28.1 137 TOWNSEND CREEK 8700 9.4 9.6 98 13.2 14.7 90 ----- ----- Basin wide percent of average 121 102 BIGHORN BASIN BALD MTN. 9380 29.8 22.9 130 24.4 20.5 119 BEAR TRAP MEADOW 8200 11.1 3.0 370 11.7 10.3 114 BLACKWATER 9780 35.9 27.9 129 33.9 23.9 142 BONE SPRINGS DIV 9350 26.4 17.9 147 21.3 17.5 122 EVENING STAR 9200 40.7 32.7 124 -M 29.0 * GRAVE SPRINGS 8550 10.9 10.9 100 11.4 12.5 91 KIRWIN 9550 16.6 12.7 131 17.2 13.6 126 MARQUETTE 8760 6.7 -M * 9.8 12.8 77 MIDDLE POWDER 7760 12.6 14.2 89 13.0 15.0 87 OWL CREEK 8975 7.7 4.1 188 8.7 7.7 113 POWDER RIVER PASS 9480 19.8 11.2 177 22.7 15.0 151 SHELL CREEK 9580 22.7 16.5 138 20.5 16.0 128 SYLVAN LAKE 8420 31.7 23.9 133 35.2 24.0 147 SYLVAN ROAD 7120 18.1 9.6 189 26.2 19.9 132 TIMBER CREEK 7950 6.5 5.0 130 7.9 9.7 81 YOUNTS PEAK 8350 23.3 18.1 129 20.5 18.3 112 ----- ----- Basin wide percent of average 136 120 SHOSHONE RIVER BLACKWATER 9780 35.9 27.9 129 33.9 23.9 142 EVENING STAR 9200 40.7 32.7 124 -M 29.0 * KIRWIN 9550 16.6 12.7 131 17.2 13.6 126 MARQUETTE 8760 6.7 -M * 9.8 12.8 77 SYLVAN LAKE 8420 31.7 23.9 133 35.2 24.0 147 SYLVAN ROAD 7120 18.1 9.6 189 26.2 19.9 132 YOUNTS PEAK 8350 23.3 18.1 129 20.5 18.3 112 ----- ----- Basin wide percent of average 133 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.1 3.0 370 11.7 10.3 114 BIG GOOSE 7990 11.8 12.3 96 13.7 12.1 113 BONE SPRINGS DIV 9350 26.4 17.9 147 21.3 17.5 122 BURGESS JUNCTION 7880 14.2 13.2 108 15.0 14.7 102 CLOUD PEAK RESERVOIR 9860 20.8 15.9 131 19.2 16.2 119 DOME LAKE 8880 17.7 13.5 131 17.2 16.0 108 GRAVE SPRINGS 8550 10.9 10.9 100 11.4 12.5 91 HANSEN SAWMILL 8360 9.9 5.1 194 11.1 10.3 108 LITTLE GOOSE 8870 13.8 -M * 18.0 -M * MIDDLE POWDER 7760 12.6 14.2 89 13.0 15.0 87 POWDER RIVER PASS 9480 19.8 11.2 177 22.7 15.0 151 SOLDIER PARK 8720 11.1 -M * 12.0 -M * SUCKER CREEK 8880 17.0 13.3 128 18.6 16.5 113 TIE CREEK 6870 8.3 5.0 166 13.2 12.7 104 ----- ----- Basin wide percent of average 133 111 BELLE FOURCHE BLIND PARK 6890 10.6 5.5 193 -M 13.5 * COLE CANYON 5910 8.8 6.1 144 15.4 8.7 177 NORTH RAPID CREEK 6130 6.5 6.4 102 16.3 10.6 154 ----- ----- Basin wide percent of average 144 164 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.4 16.9 186 36.9 22.7 163 COLUMBINE 9160 38.9 22.9 170 42.5 28.4 150 DIVIDE PEAK 8880 30.8 20.5 150 35.6 23.6 151 ELK RIVER 8700 29.3 17.3 169 33.0 22.4 147 JOE WRIGHT 10120 44.8 24.7 181 45.2 29.0 156 NORTH FRENCH CREEK 10130 60.3 34.1 177 -M 28.6 * OLD BATTLE 10000 55.3 36.1 153 47.2 38.8 122 SAGE CREEK BASIN 7850 20.3 11.9 171 23.4 13.7 171 SOUTH BRUSH CREEK 8440 24.2 12.3 197 -M 19.3 * TOWER 10500 69.3 51.5 135 47.7 43.9 109 WEBBER SPRINGS 9250 38.8 25.9 150 44.7 30.3 148 WILLOW CREEK PASS 9540 26.1 14.2 184 23.6 15.1 156 ----- ----- Basin wide percent of average 163 142 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.7 28.1 145 38.0 26.0 146 CASPER MTN. 7900 12.4 17.6 70 16.9 18.5 91 DEADMAN HILL 10220 29.7 19.3 154 29.1 20.1 145 DEER PARK 9700 21.9 19.5 112 25.5 25.9 98 LAPRELE CREEK 8375 14.7 8.5 173 17.4 15.6 112 RENO HILL 8400 17.6 15.7 112 21.0 19.1 110 ROACH 9700 27.5 18.6 148 30.7 21.6 142 SAND LAKE 10050 47.9 36.4 132 -M 28.2 * SOUTH PASS 9040 19.3 18.1 107 16.8 21.8 77 WINDY PEAK 7900 11.0 6.3 175 16.3 12.8 127 ----- ----- Basin wide percent of average 129 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 6.2 * 20.9 18.0 116 DIVIDE PEAK 8880 30.8 20.5 150 35.6 23.6 151 OLD BATTLE 10000 55.3 36.1 153 47.2 38.8 122 SANDSTONE RS 8150 -M 11.4 * -M 21.2 * WHISKEY PARK 8950 -M 30.7 * -M 32.7 * ----- ----- Basin wide percent of average 152* 129 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.1 14.6 131 19.1 15.4 124 BLIND BULL SUM 8650 42.6 28.5 149 28.5 24.7 115 EAST RIM DIVIDE 7930 17.7 13.8 128 16.6 13.5 123 ELKHART PARK G.S. 9400 17.4 13.6 128 17.2 15.4 112 GROS VENTRE SUMMIT 8750 18.5 14.1 131 18.7 14.8 126 GUNSIGHT PASS 9820 23.4 -M * 21.5 -M * KENDALL R.S. 7740 15.2 11.8 129 19.4 16.1 120 LOOMIS PARK 8240 25.2 15.7 161 26.2 19.4 135 NEW FORK LAKE 8340 15.1 9.9 153 14.0 12.9 109 POCKET CREEK 9360 16.9 -M * 18.3 -M * SNIDER BASIN 8060 24.1 13.9 173 22.8 18.1 126 SPRING CREEK DIVIDE 9000 43.3 28.9 150 39.1 29.6 132 TRIPLE PEAK 8500 41.3 25.1 165 41.6 27.9 149 ----- ----- Basin wide percent of average 147 127 LOWER GREEN RIVER HAMS FORK 7840 17.3 7.7 225 18.5 14.2 130 HEWINTA 9519 16.3 10.8 151 21.7 17.2 126 HICKERSON PARK 9145 5.7 7.0 81 12.6 9.7 130 HOLE-IN-ROCK 9150 9.0 5.9 153 14.1 9.3 152 INDIAN CREEK 9425 39.2 29.3 134 32.7 28.8 114 KELLEY R.S. 8180 25.7 15.6 165 28.7 23.0 125 STEEL CREEK PARK 10200 23.0 18.2 126 24.0 19.6 122 ----- ----- Basin wide percent of average 144 125 UPPER BEAR RIVER BUG LAKE 7950 -M 20.0 * -M 21.8 * HAYDEN FORK 9212 28.5 14.8 193 35.9 24.4 147 KELLEY R.S. 8180 25.7 15.6 165 28.7 23.0 125 LILY LAKE 9156 25.9 12.8 202 27.3 20.5 133 MONTE CRISTO 8960 47.8 29.6 161 45.1 29.3 154 SALT RIVER SUMMIT 7760 20.4 12.5 163 26.1 21.1 124 TRIAL LAKE 9992 44.9 26.6 169 40.8 28.6 143 ----- ----- Basin wide percent of average 173 139 ----------------------------------------------------------------------------- -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.