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 24 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.6 14.6 182 30.5 23.8 128 COTTONWOOD CREEK 7670 35.3 21.9 161 43.3 30.9 140 GRAND TARGHEE 9260 59.8 -M * 44.7 -M * GRANITE CREEK 6770 26.4 14.9 177 29.5 21.8 135 GRASSY LAKE 7265 48.2 35.6 135 50.0 39.9 125 GROS VENTRE SUMMIT 8750 18.5 14.2 130 18.6 14.7 127 GUNSIGHT PASS 9820 23.4 -M * 21.5 -M * LEWIS LAKE DIVIDE 7850 53.5 36.0 149 44.0 40.7 108 PHILLIPS BENCH 8200 39.3 30.5 129 40.6 32.2 126 SALT RIVER SUMMIT 7760 20.6 12.7 162 26.1 21.0 124 SNAKE RIVER STATION 6920 -M 14.9 * 32.4 24.9 130 SPRING CREEK DIVIDE 9000 43.2 28.9 149 39.0 29.5 132 THUMB DIVIDE 7980 28.6 16.9 169 25.9 21.3 122 TOGWOTEE PASS 9580 37.1 27.5 135 38.4 28.0 137 TWO OCEAN PLATEAU 9240 -M 31.5 * -M 31.1 * WILLOW CREEK 8380 46.8 31.7 148 50.0 36.4 137 ----- ----- Basin wide percent of average 149 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.8 25.6 124 30.3 22.7 133 BLACK BEAR 8170 55.1 40.6 136 53.2 44.8 119 CANYON 7870 21.0 12.5 168 22.3 17.2 130 FISHER CREEK 9100 49.9 37.6 133 -M 40.7 * MADISON PLATEAU 7750 36.0 25.4 142 37.8 29.8 127 NORTHEAST ENTRANCE 7350 16.9 8.7 194 18.9 14.3 132 PARKER PEAK 9400 36.6 24.0 153 -M 18.7 * SYLVAN LAKE 8420 31.6 23.9 132 35.2 23.8 148 THUMB DIVIDE 7980 28.6 16.9 169 25.9 21.3 122 TWO OCEAN PLATEAU 9240 -M 31.5 * -M 31.1 * WHISKEY CREEK 6800 23.3 16.7 140 27.9 23.5 119 WHITE MILL 8700 34.9 26.3 133 34.6 30.3 114 WOLVERINE 7650 17.4 8.8 198 17.7 14.6 121 ----- ----- Basin wide percent of average 143 125 WIND RIVER BURROUGHS CREEK 8750 20.5 14.5 141 21.4 18.6 115 CASTLE CREEK 8400 8.4 -M * 10.3 -M * COLD SPRINGS 9630 9.8 5.2 188 11.5 13.1 88 DEER PARK 9700 21.8 19.2 114 25.4 25.7 99 HOBBS PARK 10100 18.7 17.5 107 16.5 15.9 104 LITTLE WARM 9370 15.6 11.8 132 16.1 15.9 101 SOUTH PASS 9040 19.4 17.8 109 16.7 21.7 77 ST. LAWRENCE ALT 8620 4.9 6.4 77 9.6 11.2 86 TOGWOTEE PASS 9580 37.1 27.5 135 38.4 28.0 137 TOWNSEND CREEK 8700 9.7 9.6 101 13.1 14.6 90 ----- ----- Basin wide percent of average 122 102 BIGHORN BASIN BALD MTN. 9380 29.8 22.8 131 24.2 20.3 119 BEAR TRAP MEADOW 8200 11.2 3.2 350 11.7 10.2 115 BLACKWATER 9780 35.9 27.6 130 33.8 23.8 142 BONE SPRINGS DIV 9350 26.1 17.8 147 21.2 17.4 122 EVENING STAR 9200 40.7 32.5 125 -M 28.9 * GRAVE SPRINGS 8550 10.9 11.0 99 11.4 12.4 92 KIRWIN 9550 16.6 12.6 132 17.0 13.5 126 MARQUETTE 8760 6.7 -M * 9.7 12.7 76 MIDDLE POWDER 7760 12.7 14.2 89 13.0 14.9 87 OWL CREEK 8975 7.9 4.2 188 8.7 7.6 114 POWDER RIVER PASS 9480 19.8 11.4 174 22.6 14.9 152 SHELL CREEK 9580 22.7 16.4 138 20.5 15.9 129 SYLVAN LAKE 8420 31.6 23.9 132 35.2 23.8 148 SYLVAN ROAD 7120 18.6 9.7 192 26.2 19.8 132 TIMBER CREEK 7950 7.0 5.0 140 7.9 9.6 82 YOUNTS PEAK 8350 23.2 18.1 128 20.4 18.2 112 ----- ----- Basin wide percent of average 137 121 SHOSHONE RIVER BLACKWATER 9780 35.9 27.6 130 33.8 23.8 142 EVENING STAR 9200 40.7 32.5 125 -M 28.9 * KIRWIN 9550 16.6 12.6 132 17.0 13.5 126 MARQUETTE 8760 6.7 -M * 9.7 12.7 76 SYLVAN LAKE 8420 31.6 23.9 132 35.2 23.8 148 SYLVAN ROAD 7120 18.6 9.7 192 26.2 19.8 132 YOUNTS PEAK 8350 23.2 18.1 128 20.4 18.2 112 ----- ----- Basin wide percent of average 134 127 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.2 3.2 350 11.7 10.2 115 BIG GOOSE 7990 11.7 12.4 94 13.6 12.0 113 BONE SPRINGS DIV 9350 26.1 17.8 147 21.2 17.4 122 BURGESS JUNCTION 7880 14.2 13.2 108 14.8 14.6 101 CLOUD PEAK RESERVOIR 9860 20.5 15.9 129 18.7 16.0 117 DOME LAKE 8880 17.6 13.5 130 17.1 15.9 108 GRAVE SPRINGS 8550 10.9 11.0 99 11.4 12.4 92 HANSEN SAWMILL 8360 9.8 5.2 188 11.1 10.2 109 LITTLE GOOSE 8870 13.7 -M * 17.9 -M * MIDDLE POWDER 7760 12.7 14.2 89 13.0 14.9 87 POWDER RIVER PASS 9480 19.8 11.4 174 22.6 14.9 152 SOLDIER PARK 8720 11.0 -M * 11.9 -M * SUCKER CREEK 8880 16.9 13.3 127 18.6 16.4 113 TIE CREEK 6870 8.3 5.2 160 13.1 12.5 105 ----- ----- Basin wide percent of average 132 112 BELLE FOURCHE BLIND PARK 6890 10.6 5.9 180 -M 13.3 * COLE CANYON 5910 8.8 6.3 140 15.4 8.6 179 NORTH RAPID CREEK 6130 6.6 6.8 97 16.2 10.5 154 ----- ----- Basin wide percent of average 137 165 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.4 17.1 184 36.9 22.6 163 COLUMBINE 9160 39.0 23.1 169 42.3 28.3 149 DIVIDE PEAK 8880 30.7 20.6 149 35.5 23.4 152 ELK RIVER 8700 29.2 17.7 165 32.8 22.2 148 JOE WRIGHT 10120 44.0 24.7 178 44.5 28.8 155 NORTH FRENCH CREEK 10130 60.1 34.0 177 -M 28.4 * OLD BATTLE 10000 55.0 36.0 153 47.2 38.7 122 SAGE CREEK BASIN 7850 20.5 11.9 172 23.4 13.6 172 SOUTH BRUSH CREEK 8440 24.3 12.4 196 -M 19.2 * TOWER 10500 68.8 51.4 134 47.7 43.6 109 WEBBER SPRINGS 9250 38.7 26.0 149 44.6 30.2 148 WILLOW CREEK PASS 9540 25.6 14.2 180 23.1 15.0 154 ----- ----- Basin wide percent of average 162 142 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.3 27.9 144 38.0 25.8 147 CASPER MTN. 7900 12.4 17.6 70 17.0 18.3 93 DEADMAN HILL 10220 29.3 19.3 152 29.0 20.0 145 DEER PARK 9700 21.8 19.2 114 25.4 25.7 99 LAPRELE CREEK 8375 15.0 8.7 172 17.4 15.4 113 RENO HILL 8400 17.9 15.8 113 21.0 18.9 111 ROACH 9700 27.0 18.6 145 30.2 21.5 140 SAND LAKE 10050 47.7 36.3 131 -M 28.1 * SOUTH PASS 9040 19.4 17.8 109 16.7 21.7 77 WINDY PEAK 7900 11.3 6.5 174 16.2 12.7 128 ----- ----- Basin wide percent of average 129 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 6.5 * 20.8 18.0 116 DIVIDE PEAK 8880 30.7 20.6 149 35.5 23.4 152 OLD BATTLE 10000 55.0 36.0 153 47.2 38.7 122 SANDSTONE RS 8150 -M 11.6 * -M 21.1 * WHISKEY PARK 8950 -M 30.7 * -M 32.6 * ----- ----- Basin wide percent of average 151* 129 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.0 14.7 129 19.1 15.3 125 BLIND BULL SUM 8650 42.6 28.6 149 28.3 24.6 115 EAST RIM DIVIDE 7930 18.2 13.9 131 16.6 13.4 124 ELKHART PARK G.S. 9400 17.4 13.7 127 17.1 15.3 112 GROS VENTRE SUMMIT 8750 18.5 14.2 130 18.6 14.7 127 GUNSIGHT PASS 9820 23.4 -M * 21.5 -M * KENDALL R.S. 7740 15.5 12.0 129 19.4 16.1 120 LOOMIS PARK 8240 25.5 15.8 161 26.2 19.3 136 NEW FORK LAKE 8340 15.3 10.1 151 14.0 12.9 109 POCKET CREEK 9360 16.9 -M * 18.3 -M * SNIDER BASIN 8060 24.1 14.1 171 22.8 18.1 126 SPRING CREEK DIVIDE 9000 43.2 28.9 149 39.0 29.5 132 TRIPLE PEAK 8500 41.3 25.3 163 41.6 27.8 150 ----- ----- Basin wide percent of average 147 127 LOWER GREEN RIVER HAMS FORK 7840 17.5 7.9 222 18.5 14.1 131 HEWINTA 9519 16.3 11.0 148 21.6 17.1 126 HICKERSON PARK 9145 5.8 7.2 81 12.6 9.6 131 HOLE-IN-ROCK 9150 8.9 6.1 146 14.1 9.2 153 INDIAN CREEK 9425 39.1 29.4 133 32.6 28.6 114 KELLEY R.S. 8180 25.7 15.9 162 28.6 22.9 125 STEEL CREEK PARK 10200 22.9 18.1 127 24.0 19.4 124 ----- ----- Basin wide percent of average 142 126 UPPER BEAR RIVER BUG LAKE 7950 -M 20.3 * -M 21.7 * HAYDEN FORK 9212 28.5 15.0 190 35.9 24.2 148 KELLEY R.S. 8180 25.7 15.9 162 28.6 22.9 125 LILY LAKE 9156 25.9 13.0 199 27.4 20.4 134 MONTE CRISTO 8960 47.1 29.8 158 45.0 29.2 154 SALT RIVER SUMMIT 7760 20.6 12.7 162 26.1 21.0 124 TRIAL LAKE 9992 45.0 26.6 169 40.7 28.4 143 ----- ----- Basin wide percent of average 171 139 ----------------------------------------------------------------------------- -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.