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 THURSDAY: APRIL 21 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.3 15.4 164 29.6 23.5 126 COTTONWOOD CREEK 7670 35.9 22.7 158 42.8 30.5 140 GRAND TARGHEE 9260 58.1 -M * 44.0 -M * GRANITE CREEK 6770 25.9 15.7 165 29.0 21.6 134 GRASSY LAKE 7265 47.2 36.3 130 49.2 39.4 125 GROS VENTRE SUMMIT 8750 18.1 14.4 126 18.4 14.5 127 GUNSIGHT PASS 9820 22.8 -M * 21.2 -M * LEWIS LAKE DIVIDE 7850 52.4 36.4 144 43.7 40.3 108 PHILLIPS BENCH 8200 38.4 30.6 125 39.6 31.9 124 SALT RIVER SUMMIT 7760 20.3 13.4 151 25.9 20.8 125 SNAKE RIVER STATION 6920 -M 15.9 * 31.7 24.6 129 SPRING CREEK DIVIDE 9000 42.7 28.9 148 38.3 29.1 132 THUMB DIVIDE 7980 28.0 17.6 159 25.5 21.0 121 TOGWOTEE PASS 9580 36.3 27.3 133 37.6 27.6 136 TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.7 * WILLOW CREEK 8380 46.2 31.9 145 49.5 35.9 138 ----- ----- Basin wide percent of average 143 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.8 25.7 124 30.4 22.4 136 BLACK BEAR 8170 53.8 40.9 132 52.1 44.3 118 CANYON 7870 20.4 13.0 157 22.0 17.0 129 FISHER CREEK 9100 49.1 37.6 131 46.3 40.2 115 MADISON PLATEAU 7750 35.0 25.8 136 37.2 29.5 126 NORTHEAST ENTRANCE 7350 16.5 9.5 174 18.7 14.1 133 PARKER PEAK 9400 36.0 23.9 151 30.6 18.4 166 SYLVAN LAKE 8420 30.9 24.2 128 34.5 23.5 147 THUMB DIVIDE 7980 28.0 17.6 159 25.5 21.0 121 TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.7 * WHISKEY CREEK 6800 22.9 17.3 132 27.1 23.2 117 WHITE MILL 8700 34.4 26.3 131 34.3 29.9 115 WOLVERINE 7650 17.6 9.8 180 17.8 14.4 124 ----- ----- Basin wide percent of average 139 126 WIND RIVER BURROUGHS CREEK 8750 20.5 14.8 139 21.3 18.3 116 CASTLE CREEK 8400 8.1 -M * 10.4 -M * COLD SPRINGS 9630 9.8 5.8 169 11.4 12.7 90 DEER PARK 9700 21.5 17.9 120 25.1 25.2 100 HOBBS PARK 10100 18.3 17.1 107 16.5 15.5 106 LITTLE WARM 9370 15.0 12.1 124 15.7 15.6 101 SOUTH PASS 9040 18.9 17.9 106 16.6 21.2 78 ST. LAWRENCE ALT 8620 5.4 6.6 82 9.7 10.9 89 TOGWOTEE PASS 9580 36.3 27.3 133 37.6 27.6 136 TOWNSEND CREEK 8700 9.6 9.6 100 13.0 14.2 92 ----- ----- Basin wide percent of average 120 104 BIGHORN BASIN BALD MTN. 9380 29.1 22.6 129 23.8 19.9 120 BEAR TRAP MEADOW 8200 10.9 3.7 295 11.4 10.0 114 BLACKWATER 9780 35.3 27.4 129 33.1 23.4 141 BONE SPRINGS DIV 9350 25.6 17.8 144 20.9 17.0 123 EVENING STAR 9200 40.1 32.4 124 41.9 28.5 147 GRAVE SPRINGS 8550 10.8 11.0 98 11.2 12.0 93 KIRWIN 9550 16.4 12.5 131 17.2 13.1 131 MARQUETTE 8760 7.0 -M * 9.8 12.2 80 MIDDLE POWDER 7760 12.6 14.3 88 13.0 14.5 90 OWL CREEK 8975 8.1 4.7 172 8.7 7.3 119 POWDER RIVER PASS 9480 19.3 11.7 165 22.2 14.5 153 SHELL CREEK 9580 22.0 16.3 135 19.8 15.5 128 SYLVAN LAKE 8420 30.9 24.2 128 34.5 23.5 147 SYLVAN ROAD 7120 18.2 10.7 170 25.7 19.5 132 TIMBER CREEK 7950 6.6 5.2 127 7.8 9.2 85 YOUNTS PEAK 8350 22.8 18.2 125 20.2 18.0 112 ----- ----- Basin wide percent of average 133 124 SHOSHONE RIVER BLACKWATER 9780 35.3 27.4 129 33.1 23.4 141 EVENING STAR 9200 40.1 32.4 124 41.9 28.5 147 KIRWIN 9550 16.4 12.5 131 17.2 13.1 131 MARQUETTE 8760 7.0 -M * 9.8 12.2 80 SYLVAN LAKE 8420 30.9 24.2 128 34.5 23.5 147 SYLVAN ROAD 7120 18.2 10.7 170 25.7 19.5 132 YOUNTS PEAK 8350 22.8 18.2 125 20.2 18.0 112 ----- ----- Basin wide percent of average 131 132 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.9 3.7 295 11.4 10.0 114 BIG GOOSE 7990 11.6 12.5 93 13.5 11.5 117 BONE SPRINGS DIV 9350 25.6 17.8 144 20.9 17.0 123 BURGESS JUNCTION 7880 13.8 13.3 104 14.7 14.2 104 CLOUD PEAK RESERVOIR 9860 20.2 15.8 128 18.9 15.5 122 DOME LAKE 8880 17.3 13.8 125 16.8 15.5 108 GRAVE SPRINGS 8550 10.8 11.0 98 11.2 12.0 93 HANSEN SAWMILL 8360 9.9 5.6 177 11.1 9.9 112 LITTLE GOOSE 8870 13.6 -M * 17.8 -M * MIDDLE POWDER 7760 12.6 14.3 88 13.0 14.5 90 POWDER RIVER PASS 9480 19.3 11.7 165 22.2 14.5 153 SOLDIER PARK 8720 10.8 -M * 11.8 -M * SUCKER CREEK 8880 16.4 13.5 121 18.1 16.0 113 TIE CREEK 6870 8.1 5.2 156 12.8 12.2 105 ----- ----- Basin wide percent of average 128 113 BELLE FOURCHE BLIND PARK 6890 9.9 6.8 146 18.8 13.0 145 COLE CANYON 5910 7.9 6.7 118 14.6 8.2 178 NORTH RAPID CREEK 6130 6.6 7.8 85 15.8 10.1 156 ----- ----- Basin wide percent of average 115 157 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.8 17.4 177 36.9 22.3 165 COLUMBINE 9160 38.7 23.8 163 40.9 28.0 146 DIVIDE PEAK 8880 30.1 20.8 145 34.7 23.1 150 ELK RIVER 8700 28.5 18.5 154 31.9 21.9 146 JOE WRIGHT 10120 41.9 24.4 172 43.2 28.3 153 NORTH FRENCH CREEK 10130 58.7 33.6 175 -M 27.9 * OLD BATTLE 10000 53.5 35.6 150 47.0 38.1 123 SAGE CREEK BASIN 7850 20.7 12.1 171 23.0 13.4 172 SOUTH BRUSH CREEK 8440 23.5 12.8 184 -M 18.8 * TOWER 10500 66.7 50.8 131 47.6 43.0 111 WEBBER SPRINGS 9250 37.7 26.0 145 43.3 29.7 146 WILLOW CREEK PASS 9540 24.3 14.1 172 21.8 14.7 148 ----- ----- Basin wide percent of average 157 141 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.6 27.5 144 38.0 25.3 150 CASPER MTN. 7900 12.3 17.4 71 16.8 17.7 95 DEADMAN HILL 10220 27.7 19.0 146 27.3 19.5 140 DEER PARK 9700 21.5 17.9 120 25.1 25.2 100 LAPRELE CREEK 8375 14.4 9.3 155 17.0 15.0 113 RENO HILL 8400 17.6 16.0 110 20.8 18.4 113 ROACH 9700 25.7 18.5 139 28.8 21.1 136 SAND LAKE 10050 46.6 35.9 130 -M 27.5 * SOUTH PASS 9040 18.9 17.9 106 16.6 21.2 78 WINDY PEAK 7900 11.5 7.1 162 16.0 12.4 129 ----- ----- Basin wide percent of average 126 117 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 7.2 * 19.8 17.7 112 DIVIDE PEAK 8880 30.1 20.8 145 34.7 23.1 150 OLD BATTLE 10000 53.5 35.6 150 47.0 38.1 123 SANDSTONE RS 8150 21.4 12.4 173 -M 20.7 * WHISKEY PARK 8950 -M 30.6 * -M 32.0 * ----- ----- Basin wide percent of average 153 129 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.6 15.0 124 18.8 15.0 125 BLIND BULL SUM 8650 42.3 28.7 147 28.2 24.3 116 EAST RIM DIVIDE 7930 17.7 14.0 126 16.5 13.3 124 ELKHART PARK G.S. 9400 17.2 13.9 124 17.0 15.0 113 GROS VENTRE SUMMIT 8750 18.1 14.4 126 18.4 14.5 127 GUNSIGHT PASS 9820 22.8 -M * 21.2 -M * KENDALL R.S. 7740 15.0 12.6 119 18.9 15.9 119 LOOMIS PARK 8240 24.5 16.3 150 25.6 19.1 134 NEW FORK LAKE 8340 14.8 10.6 140 13.8 12.6 110 POCKET CREEK 9360 16.5 -M * 17.9 -M * SNIDER BASIN 8060 23.3 14.5 161 22.6 17.9 126 SPRING CREEK DIVIDE 9000 42.7 28.9 148 38.3 29.1 132 TRIPLE PEAK 8500 40.9 25.7 159 41.0 27.4 150 ----- ----- Basin wide percent of average 141 127 LOWER GREEN RIVER HAMS FORK 7840 16.2 8.7 186 18.0 13.9 129 HEWINTA 9519 15.7 11.6 135 21.3 16.8 127 HICKERSON PARK 9145 6.4 7.7 83 12.5 9.4 133 HOLE-IN-ROCK 9150 8.6 6.6 130 13.8 8.9 155 INDIAN CREEK 9425 38.2 29.6 129 32.1 28.3 113 KELLEY R.S. 8180 25.1 16.4 153 28.2 22.6 125 STEEL CREEK PARK 10200 22.4 17.8 126 23.8 19.1 125 ----- ----- Basin wide percent of average 135 126 UPPER BEAR RIVER BUG LAKE 7950 -M 20.9 * -M 21.4 * HAYDEN FORK 9212 27.8 15.6 178 35.3 23.9 148 KELLEY R.S. 8180 25.1 16.4 153 28.2 22.6 125 LILY LAKE 9156 25.6 13.6 188 26.9 20.0 135 MONTE CRISTO 8960 47.0 30.2 156 44.7 28.7 156 SALT RIVER SUMMIT 7760 20.3 13.4 151 25.9 20.8 125 TRIAL LAKE 9992 44.4 26.6 167 39.8 28.0 142 ----- ----- Basin wide percent of average 164 139 ----------------------------------------------------------------------------- -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.