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 18 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 25.2 16.2 156 29.3 23.2 126 COTTONWOOD CREEK 7670 34.8 23.3 149 41.9 30.2 139 GRAND TARGHEE 9260 57.4 -M * 43.0 -M * GRANITE CREEK 6770 25.6 16.4 156 28.5 21.3 134 GRASSY LAKE 7265 46.9 36.8 127 48.5 39.0 124 GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.2 14.3 127 GUNSIGHT PASS 9820 22.5 -M * 21.0 -M * LEWIS LAKE DIVIDE 7850 51.1 36.6 140 -M 39.8 * PHILLIPS BENCH 8200 38.1 30.7 124 38.9 31.5 123 SALT RIVER SUMMIT 7760 19.9 13.9 143 25.3 20.5 123 SNAKE RIVER STATION 6920 -M 16.8 * 31.2 24.3 128 SPRING CREEK DIVIDE 9000 41.9 28.7 146 38.0 28.8 132 THUMB DIVIDE 7980 26.6 18.2 146 24.4 20.7 118 TOGWOTEE PASS 9580 35.8 27.0 133 37.0 27.2 136 TWO OCEAN PLATEAU 9240 -M 30.9 * -M 30.3 * WILLOW CREEK 8380 45.1 31.9 141 48.6 35.4 137 ----- ----- Basin wide percent of average 139 130 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.1 25.5 122 29.8 22.1 135 BLACK BEAR 8170 53.2 41.0 130 51.6 43.8 118 CANYON 7870 20.3 13.4 151 21.9 16.8 130 FISHER CREEK 9100 -M 37.2 * -M 39.7 * MADISON PLATEAU 7750 34.8 25.9 134 36.8 29.2 126 NORTHEAST ENTRANCE 7350 16.1 10.1 159 18.3 13.9 132 PARKER PEAK 9400 35.0 23.6 148 29.7 18.1 164 SYLVAN LAKE 8420 29.8 24.2 123 33.5 23.1 145 THUMB DIVIDE 7980 26.6 18.2 146 24.4 20.7 118 TWO OCEAN PLATEAU 9240 -M 30.9 * -M 30.3 * WHISKEY CREEK 6800 23.2 17.6 132 26.9 22.9 117 WHITE MILL 8700 33.6 26.1 129 33.6 29.5 114 WOLVERINE 7650 17.1 10.4 164 17.3 14.1 123 ----- ----- Basin wide percent of average 136 127 WIND RIVER BURROUGHS CREEK 8750 20.1 15.0 134 21.0 18.0 117 CASTLE CREEK 8400 7.8 -M * 10.2 -M * COLD SPRINGS 9630 10.0 6.3 159 11.2 12.4 90 DEER PARK 9700 21.3 17.5 122 25.0 24.6 102 HOBBS PARK 10100 18.2 16.9 108 16.3 15.1 108 LITTLE WARM 9370 14.9 12.4 120 15.5 15.2 102 SOUTH PASS 9040 18.9 17.7 107 16.4 20.8 79 ST. LAWRENCE ALT 8620 5.7 7.0 81 9.7 10.5 92 TOGWOTEE PASS 9580 35.8 27.0 133 37.0 27.2 136 TOWNSEND CREEK 8700 9.9 9.6 103 13.0 13.8 94 ----- ----- Basin wide percent of average 120 105 BIGHORN BASIN BALD MTN. 9380 28.4 22.1 129 23.4 19.5 120 BEAR TRAP MEADOW 8200 10.5 4.1 256 10.7 9.7 110 BLACKWATER 9780 33.8 27.1 125 31.9 23.0 139 BONE SPRINGS DIV 9350 24.2 17.6 138 19.8 16.6 119 EVENING STAR 9200 39.0 32.3 121 40.8 28.0 146 GRAVE SPRINGS 8550 10.7 10.7 100 11.1 11.7 95 KIRWIN 9550 16.2 12.4 131 17.0 12.8 133 MARQUETTE 8760 6.0 -M * 8.9 11.9 75 MIDDLE POWDER 7760 12.0 14.0 86 12.5 14.2 88 OWL CREEK 8975 7.6 5.0 152 8.3 7.1 117 POWDER RIVER PASS 9480 18.1 11.8 153 21.1 14.2 149 SHELL CREEK 9580 20.9 16.2 129 18.7 15.2 123 SYLVAN LAKE 8420 29.8 24.2 123 33.5 23.1 145 SYLVAN ROAD 7120 17.8 11.5 155 25.0 19.3 130 TIMBER CREEK 7950 6.2 5.5 113 7.7 8.9 87 YOUNTS PEAK 8350 22.5 18.2 124 19.8 17.7 112 ----- ----- Basin wide percent of average 128 123 SHOSHONE RIVER BLACKWATER 9780 33.8 27.1 125 31.9 23.0 139 EVENING STAR 9200 39.0 32.3 121 40.8 28.0 146 KIRWIN 9550 16.2 12.4 131 17.0 12.8 133 MARQUETTE 8760 6.0 -M * 8.9 11.9 75 SYLVAN LAKE 8420 29.8 24.2 123 33.5 23.1 145 SYLVAN ROAD 7120 17.8 11.5 155 25.0 19.3 130 YOUNTS PEAK 8350 22.5 18.2 124 19.8 17.7 112 ----- ----- Basin wide percent of average 127 130 POWDER-TONGUE BEAR TRAP MEADOW 8200 10.5 4.1 256 10.7 9.7 110 BIG GOOSE 7990 10.7 12.5 86 12.5 11.0 114 BONE SPRINGS DIV 9350 24.2 17.6 138 19.8 16.6 119 BURGESS JUNCTION 7880 13.4 13.2 102 14.3 13.9 103 CLOUD PEAK RESERVOIR 9860 19.5 15.4 127 18.3 15.1 121 DOME LAKE 8880 16.5 13.8 120 15.8 15.1 105 GRAVE SPRINGS 8550 10.7 10.7 100 11.1 11.7 95 HANSEN SAWMILL 8360 9.4 5.8 162 10.6 9.6 110 LITTLE GOOSE 8870 12.4 -M * 16.7 -M * MIDDLE POWDER 7760 12.0 14.0 86 12.5 14.2 88 POWDER RIVER PASS 9480 18.1 11.8 153 21.1 14.2 149 SOLDIER PARK 8720 10.4 -M * 11.4 -M * SUCKER CREEK 8880 15.7 13.4 117 17.4 15.6 112 TIE CREEK 6870 7.7 5.4 143 12.5 11.8 106 ----- ----- Basin wide percent of average 122 111 BELLE FOURCHE BLIND PARK 6890 9.5 7.0 136 18.4 12.7 145 COLE CANYON 5910 7.3 7.0 104 13.7 7.9 173 NORTH RAPID CREEK 6130 6.4 8.5 75 15.4 9.8 157 ----- ----- Basin wide percent of average 103 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 29.3 17.6 166 37.0 21.9 169 COLUMBINE 9160 37.0 24.3 152 39.5 27.6 143 DIVIDE PEAK 8880 28.4 20.9 136 32.9 22.8 144 ELK RIVER 8700 27.7 19.2 144 30.2 21.6 140 JOE WRIGHT 10120 39.3 24.0 164 41.2 27.8 148 NORTH FRENCH CREEK 10130 56.0 33.1 169 -M 27.4 * OLD BATTLE 10000 50.4 35.1 144 46.9 37.7 124 SAGE CREEK BASIN 7850 21.0 12.1 174 21.7 13.2 164 SOUTH BRUSH CREEK 8440 22.4 13.1 171 26.5 18.5 143 TOWER 10500 63.2 50.2 126 47.6 42.4 112 WEBBER SPRINGS 9250 35.7 26.1 137 41.1 29.3 140 WILLOW CREEK PASS 9540 23.3 13.9 168 20.6 14.4 143 ----- ----- Basin wide percent of average 150 139 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 38.0 27.0 141 33.6 24.9 135 CASPER MTN. 7900 12.1 17.1 71 16.3 17.2 95 DEADMAN HILL 10220 25.5 18.7 136 25.7 19.2 134 DEER PARK 9700 21.3 17.5 122 25.0 24.6 102 LAPRELE CREEK 8375 13.6 9.8 139 16.2 14.6 111 RENO HILL 8400 16.6 16.0 104 19.9 17.8 112 ROACH 9700 23.9 18.4 130 27.1 20.8 130 SAND LAKE 10050 44.6 35.4 126 -M 27.1 * SOUTH PASS 9040 18.9 17.7 107 16.4 20.8 79 WINDY PEAK 7900 10.8 7.6 142 15.2 12.1 126 ----- ----- Basin wide percent of average 122 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.0 8.0 138 18.3 17.4 105 DIVIDE PEAK 8880 28.4 20.9 136 32.9 22.8 144 OLD BATTLE 10000 50.4 35.1 144 46.9 37.7 124 SANDSTONE RS 8150 21.4 12.9 166 -M 20.4 * WHISKEY PARK 8950 -M 30.6 * -M 31.5 * ----- ----- Basin wide percent of average 145 126 UPPER GREEN RIVER BIG SANDY OPENING 9080 18.3 15.2 120 18.5 14.7 126 BLIND BULL SUM 8650 41.3 28.9 143 27.6 24.1 115 EAST RIM DIVIDE 7930 17.2 14.0 123 16.1 13.1 123 ELKHART PARK G.S. 9400 16.8 14.0 120 16.6 14.8 112 GROS VENTRE SUMMIT 8750 17.9 14.5 123 18.2 14.3 127 GUNSIGHT PASS 9820 22.5 -M * 21.0 -M * KENDALL R.S. 7740 14.6 13.2 111 18.4 15.7 117 LOOMIS PARK 8240 23.9 16.8 142 24.9 18.9 132 NEW FORK LAKE 8340 14.5 11.0 132 13.5 12.5 108 POCKET CREEK 9360 16.0 -M * 17.6 -M * SNIDER BASIN 8060 23.2 14.7 158 22.1 17.7 125 SPRING CREEK DIVIDE 9000 41.9 28.7 146 38.0 28.8 132 TRIPLE PEAK 8500 40.1 25.9 155 40.1 27.1 148 ----- ----- Basin wide percent of average 137 126 LOWER GREEN RIVER HAMS FORK 7840 15.8 9.4 168 17.2 13.6 126 HEWINTA 9519 14.7 12.0 123 20.1 16.5 122 HICKERSON PARK 9145 6.6 8.1 81 12.0 9.2 130 HOLE-IN-ROCK 9150 8.9 7.0 127 13.4 8.7 154 INDIAN CREEK 9425 37.2 29.6 126 31.3 28.0 112 KELLEY R.S. 8180 24.5 16.9 145 27.6 22.3 124 STEEL CREEK PARK 10200 21.1 17.6 120 23.5 18.7 126 ----- ----- Basin wide percent of average 128 124 UPPER BEAR RIVER BUG LAKE 7950 34.8 21.4 163 34.0 21.1 161 HAYDEN FORK 9212 26.6 16.1 165 33.7 23.5 143 KELLEY R.S. 8180 24.5 16.9 145 27.6 22.3 124 LILY LAKE 9156 24.8 14.1 176 25.6 19.7 130 MONTE CRISTO 8960 45.0 30.4 148 42.8 28.3 151 SALT RIVER SUMMIT 7760 19.9 13.9 143 25.3 20.5 123 TRIAL LAKE 9992 42.2 26.5 159 39.0 27.6 141 ----- ----- Basin wide percent of average 156 140 ----------------------------------------------------------------------------- -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.