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 WEDNESDAY: APRIL 20 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.5 15.7 162 29.7 23.4 127 COTTONWOOD CREEK 7670 36.0 22.9 157 42.7 30.4 140 GRAND TARGHEE 9260 57.9 -M * 43.9 -M * GRANITE CREEK 6770 25.7 15.9 162 29.0 21.5 135 GRASSY LAKE 7265 47.1 36.5 129 49.1 39.3 125 GROS VENTRE SUMMIT 8750 17.9 14.4 124 18.2 14.4 126 GUNSIGHT PASS 9820 22.7 -M * 21.1 -M * LEWIS LAKE DIVIDE 7850 52.0 36.5 142 43.5 40.1 108 PHILLIPS BENCH 8200 38.4 30.7 125 39.6 31.8 125 SALT RIVER SUMMIT 7760 20.1 13.6 148 25.7 20.7 124 SNAKE RIVER STATION 6920 -M 16.2 * 31.7 24.5 129 SPRING CREEK DIVIDE 9000 42.4 28.8 147 38.2 29.0 132 THUMB DIVIDE 7980 27.8 17.8 156 25.4 20.9 122 TOGWOTEE PASS 9580 36.2 27.2 133 37.5 27.5 136 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 30.6 * WILLOW CREEK 8380 46.0 31.9 144 49.5 35.7 139 ----- ----- Basin wide percent of average 142 128 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.6 25.6 123 30.3 22.3 136 BLACK BEAR 8170 53.5 40.9 131 51.9 44.1 118 CANYON 7870 20.5 13.2 155 21.9 16.9 130 FISHER CREEK 9100 48.9 37.4 131 46.2 40.0 116 MADISON PLATEAU 7750 35.0 25.9 135 37.0 29.4 126 NORTHEAST ENTRANCE 7350 16.5 9.7 170 18.7 14.0 134 PARKER PEAK 9400 35.8 23.7 151 30.4 18.3 166 SYLVAN LAKE 8420 30.8 24.1 128 34.4 23.3 148 THUMB DIVIDE 7980 27.8 17.8 156 25.4 20.9 122 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 30.6 * WHISKEY CREEK 6800 23.0 17.4 132 27.0 23.1 117 WHITE MILL 8700 34.4 26.2 131 34.2 29.7 115 WOLVERINE 7650 17.5 10.0 175 17.5 14.3 122 ----- ----- Basin wide percent of average 138 127 WIND RIVER BURROUGHS CREEK 8750 20.4 14.9 137 21.3 18.2 117 CASTLE CREEK 8400 8.0 -M * 10.4 -M * COLD SPRINGS 9630 10.0 5.9 169 11.2 12.6 89 DEER PARK 9700 21.6 18.0 120 25.1 25.0 100 HOBBS PARK 10100 18.5 17.0 109 16.4 15.3 107 LITTLE WARM 9370 15.2 12.2 125 15.6 15.4 101 SOUTH PASS 9040 19.1 17.9 107 16.5 21.1 78 ST. LAWRENCE ALT 8620 5.6 6.7 84 9.7 10.8 90 TOGWOTEE PASS 9580 36.2 27.2 133 37.5 27.5 136 TOWNSEND CREEK 8700 9.9 9.6 103 13.0 14.0 93 ----- ----- Basin wide percent of average 121 104 BIGHORN BASIN BALD MTN. 9380 29.1 22.5 129 23.8 19.8 120 BEAR TRAP MEADOW 8200 10.8 3.8 284 11.3 9.9 114 BLACKWATER 9780 35.2 27.3 129 33.1 23.3 142 BONE SPRINGS DIV 9350 25.6 17.7 145 20.9 16.9 124 EVENING STAR 9200 39.7 32.4 123 41.5 28.3 147 GRAVE SPRINGS 8550 10.8 11.0 98 11.2 11.9 94 KIRWIN 9550 16.3 12.5 130 17.1 13.0 132 MARQUETTE 8760 7.0 -M * 9.8 12.1 81 MIDDLE POWDER 7760 12.5 14.3 87 12.8 14.4 89 OWL CREEK 8975 8.1 4.9 165 8.7 7.2 121 POWDER RIVER PASS 9480 19.2 11.7 164 22.2 14.4 154 SHELL CREEK 9580 21.9 16.3 134 19.8 15.4 129 SYLVAN LAKE 8420 30.8 24.1 128 34.4 23.3 148 SYLVAN ROAD 7120 18.3 11.1 165 25.7 19.5 132 TIMBER CREEK 7950 6.3 5.4 117 7.8 9.1 86 YOUNTS PEAK 8350 22.7 18.2 125 20.1 17.9 112 ----- ----- Basin wide percent of average 132 125 SHOSHONE RIVER BLACKWATER 9780 35.2 27.3 129 33.1 23.3 142 EVENING STAR 9200 39.7 32.4 123 41.5 28.3 147 KIRWIN 9550 16.3 12.5 130 17.1 13.0 132 MARQUETTE 8760 7.0 -M * 9.8 12.1 81 SYLVAN LAKE 8420 30.8 24.1 128 34.4 23.3 148 SYLVAN ROAD 7120 18.3 11.1 165 25.7 19.5 132 YOUNTS PEAK 8350 22.7 18.2 125 20.1 17.9 112 ----- ----- Basin wide percent of average 130 132 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.8 3.8 284 11.3 9.9 114 BIG GOOSE 7990 11.4 12.5 91 13.2 11.4 116 BONE SPRINGS DIV 9350 25.6 17.7 145 20.9 16.9 124 BURGESS JUNCTION 7880 13.9 13.3 105 14.7 14.1 104 CLOUD PEAK RESERVOIR 9860 20.1 15.7 128 18.8 15.4 122 DOME LAKE 8880 17.1 13.8 124 16.6 15.4 108 GRAVE SPRINGS 8550 10.8 11.0 98 11.2 11.9 94 HANSEN SAWMILL 8360 9.7 5.7 170 11.0 9.8 112 LITTLE GOOSE 8870 13.6 -M * 17.7 -M * MIDDLE POWDER 7760 12.5 14.3 87 12.8 14.4 89 POWDER RIVER PASS 9480 19.2 11.7 164 22.2 14.4 154 SOLDIER PARK 8720 10.7 -M * 11.7 -M * SUCKER CREEK 8880 16.2 13.5 120 17.9 15.9 113 TIE CREEK 6870 8.0 5.2 154 12.8 12.0 107 ----- ----- Basin wide percent of average 127 114 BELLE FOURCHE BLIND PARK 6890 9.9 7.0 141 18.8 12.9 146 COLE CANYON 5910 7.8 6.8 115 14.5 8.1 179 NORTH RAPID CREEK 6130 6.8 8.1 84 15.7 10.0 157 ----- ----- Basin wide percent of average 112 158 UPPER N. PLATTE RIVER CINNABAR PARK 9574 30.5 17.5 174 36.9 22.2 166 COLUMBINE 9160 38.2 24.0 159 40.7 27.8 146 DIVIDE PEAK 8880 29.8 20.9 143 34.4 23.0 150 ELK RIVER 8700 28.2 18.7 151 31.4 21.8 144 JOE WRIGHT 10120 41.3 24.3 170 42.0 28.1 149 NORTH FRENCH CREEK 10130 58.1 33.4 174 -M 27.7 * OLD BATTLE 10000 52.3 35.4 148 47.0 38.0 124 SAGE CREEK BASIN 7850 20.9 12.1 173 22.9 13.3 172 SOUTH BRUSH CREEK 8440 23.1 12.9 179 -M 18.7 * TOWER 10500 65.9 50.6 130 47.6 42.8 111 WEBBER SPRINGS 9250 37.2 26.0 143 42.9 29.6 145 WILLOW CREEK PASS 9540 24.1 14.0 172 21.7 14.6 149 ----- ----- Basin wide percent of average 155 141 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 39.1 27.3 143 33.6 25.2 133 CASPER MTN. 7900 12.2 17.3 71 16.8 17.5 96 DEADMAN HILL 10220 27.3 18.9 144 27.2 19.4 140 DEER PARK 9700 21.6 18.0 120 25.1 25.0 100 LAPRELE CREEK 8375 14.0 9.5 147 16.6 14.9 111 RENO HILL 8400 17.3 16.0 108 20.4 18.2 112 ROACH 9700 25.1 18.5 136 28.4 21.0 135 SAND LAKE 10050 46.1 35.7 129 -M 27.4 * SOUTH PASS 9040 19.1 17.9 107 16.5 21.1 78 WINDY PEAK 7900 11.3 7.3 155 15.8 12.3 128 ----- ----- Basin wide percent of average 125 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 7.5 * 19.4 17.6 110 DIVIDE PEAK 8880 29.8 20.9 143 34.4 23.0 150 OLD BATTLE 10000 52.3 35.4 148 47.0 38.0 124 SANDSTONE RS 8150 21.1 12.6 167 -M 20.6 * WHISKEY PARK 8950 -M 30.6 * -M 31.9 * ----- ----- Basin wide percent of average 150 128 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.5 15.1 123 18.6 14.9 125 BLIND BULL SUM 8650 41.8 28.8 145 28.0 24.2 116 EAST RIM DIVIDE 7930 17.6 14.0 126 16.3 13.2 123 ELKHART PARK G.S. 9400 17.2 13.9 124 16.8 14.9 113 GROS VENTRE SUMMIT 8750 17.9 14.4 124 18.2 14.4 126 GUNSIGHT PASS 9820 22.7 -M * 21.1 -M * KENDALL R.S. 7740 14.9 12.8 116 18.7 15.8 118 LOOMIS PARK 8240 24.3 16.5 147 25.5 19.0 134 NEW FORK LAKE 8340 14.9 10.8 138 13.6 12.6 108 POCKET CREEK 9360 16.2 -M * 17.7 -M * SNIDER BASIN 8060 23.1 14.6 158 22.4 17.8 126 SPRING CREEK DIVIDE 9000 42.4 28.8 147 38.2 29.0 132 TRIPLE PEAK 8500 40.6 25.7 158 40.8 27.3 149 ----- ----- Basin wide percent of average 140 127 LOWER GREEN RIVER HAMS FORK 7840 16.6 8.9 187 17.9 13.8 130 HEWINTA 9519 15.2 11.7 130 20.9 16.7 125 HICKERSON PARK 9145 6.4 7.8 82 12.2 9.3 131 HOLE-IN-ROCK 9150 8.4 6.7 125 13.6 8.9 153 INDIAN CREEK 9425 37.8 29.6 128 31.9 28.2 113 KELLEY R.S. 8180 25.0 16.6 151 28.0 22.5 124 STEEL CREEK PARK 10200 21.9 17.7 124 23.7 19.0 125 ----- ----- Basin wide percent of average 133 125 UPPER BEAR RIVER BUG LAKE 7950 35.0 21.1 166 34.8 21.3 163 HAYDEN FORK 9212 27.0 15.8 171 34.9 23.7 147 KELLEY R.S. 8180 25.0 16.6 151 28.0 22.5 124 LILY LAKE 9156 25.3 13.8 183 26.6 19.9 134 MONTE CRISTO 8960 46.9 30.3 155 43.9 28.5 154 SALT RIVER SUMMIT 7760 20.1 13.6 148 25.7 20.7 124 TRIAL LAKE 9992 43.5 26.5 164 39.6 27.9 142 ----- ----- Basin wide percent of average 162 142 ----------------------------------------------------------------------------- -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.