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 27 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.1 13.6 192 30.7 24.0 128 COTTONWOOD CREEK 7670 36.5 21.1 173 44.3 31.4 141 GRAND TARGHEE 9260 61.0 -M * 45.1 -M * GRANITE CREEK 6770 26.1 14.1 185 29.6 22.1 134 GRASSY LAKE 7265 48.9 34.7 141 50.9 40.3 126 GROS VENTRE SUMMIT 8750 18.4 13.8 133 18.7 15.0 125 GUNSIGHT PASS 9820 23.4 -M * 21.6 -M * LEWIS LAKE DIVIDE 7850 54.5 35.5 154 44.4 41.1 108 PHILLIPS BENCH 8200 39.9 30.1 133 41.2 32.6 126 SALT RIVER SUMMIT 7760 20.8 11.9 175 26.4 21.3 124 SNAKE RIVER STATION 6920 -M 13.8 * 32.9 25.2 131 SPRING CREEK DIVIDE 9000 43.9 28.8 152 39.8 29.8 134 THUMB DIVIDE 7980 28.9 16.1 180 26.3 21.6 122 TOGWOTEE PASS 9580 37.3 27.7 135 38.7 28.4 136 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.5 * WILLOW CREEK 8380 47.5 31.4 151 51.4 37.0 139 ----- ----- Basin wide percent of average 154 129 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 32.3 25.8 125 31.0 23.0 135 BLACK BEAR 8170 56.8 40.5 140 54.5 45.2 121 CANYON 7870 21.5 12.0 179 23.1 17.4 133 FISHER CREEK 9100 50.6 37.8 134 47.9 41.2 116 MADISON PLATEAU 7750 37.4 25.1 149 39.2 30.0 131 NORTHEAST ENTRANCE 7350 17.2 8.0 215 19.3 14.5 133 PARKER PEAK 9400 37.4 24.4 153 31.8 19.1 166 SYLVAN LAKE 8420 32.5 24.1 135 36.1 24.2 149 THUMB DIVIDE 7980 28.9 16.1 180 26.3 21.6 122 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.5 * WHISKEY CREEK 6800 24.2 16.1 150 29.0 23.8 122 WHITE MILL 8700 35.5 26.4 134 35.1 30.6 115 WOLVERINE 7650 17.3 8.1 214 17.9 14.9 120 ----- ----- Basin wide percent of average 148 128 WIND RIVER BURROUGHS CREEK 8750 20.6 14.3 144 21.5 18.9 114 CASTLE CREEK 8400 7.7 -M * 10.4 -M * COLD SPRINGS 9630 10.1 4.9 206 11.6 13.4 87 DEER PARK 9700 21.9 19.5 112 25.6 26.3 97 HOBBS PARK 10100 18.7 18.0 104 16.7 16.3 102 LITTLE WARM 9370 15.5 11.7 132 16.2 16.3 99 SOUTH PASS 9040 19.0 18.2 104 16.8 22.1 76 ST. LAWRENCE ALT 8620 4.2 6.5 65 9.6 11.6 83 TOGWOTEE PASS 9580 37.3 27.7 135 38.7 28.4 136 TOWNSEND CREEK 8700 9.3 9.7 96 13.2 15.0 88 ----- ----- Basin wide percent of average 120 101 BIGHORN BASIN BALD MTN. 9380 30.2 23.3 130 24.6 20.7 119 BEAR TRAP MEADOW 8200 11.0 2.9 379 11.8 10.5 112 BLACKWATER 9780 36.2 28.3 128 34.2 24.2 141 BONE SPRINGS DIV 9350 26.8 18.2 147 21.8 17.8 122 EVENING STAR 9200 40.7 32.9 124 42.5 29.3 145 GRAVE SPRINGS 8550 11.3 11.1 102 11.8 12.7 93 KIRWIN 9550 16.7 12.9 129 17.3 13.8 125 MARQUETTE 8760 6.6 -M * 9.8 13.1 75 MIDDLE POWDER 7760 13.3 14.6 91 13.3 15.3 87 OWL CREEK 8975 7.5 4.1 183 8.8 7.9 111 POWDER RIVER PASS 9480 19.8 11.1 178 22.9 15.3 150 SHELL CREEK 9580 23.0 16.7 138 20.7 16.3 127 SYLVAN LAKE 8420 32.5 24.1 135 36.1 24.2 149 SYLVAN ROAD 7120 18.0 9.2 196 26.7 20.1 133 TIMBER CREEK 7950 6.3 5.1 124 8.0 10.0 80 YOUNTS PEAK 8350 23.3 18.2 128 20.6 18.5 111 ----- ----- Basin wide percent of average 136 123 SHOSHONE RIVER BLACKWATER 9780 36.2 28.3 128 34.2 24.2 141 EVENING STAR 9200 40.7 32.9 124 42.5 29.3 145 KIRWIN 9550 16.7 12.9 129 17.3 13.8 125 MARQUETTE 8760 6.6 -M * 9.8 13.1 75 SYLVAN LAKE 8420 32.5 24.1 135 36.1 24.2 149 SYLVAN ROAD 7120 18.0 9.2 196 26.7 20.1 133 YOUNTS PEAK 8350 23.3 18.2 128 20.6 18.5 111 ----- ----- Basin wide percent of average 133 131 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.0 2.9 379 11.8 10.5 112 BIG GOOSE 7990 12.3 12.1 102 14.3 12.4 115 BONE SPRINGS DIV 9350 26.8 18.2 147 21.8 17.8 122 BURGESS JUNCTION 7880 14.8 13.5 110 15.6 15.0 104 CLOUD PEAK RESERVOIR 9860 20.8 16.3 128 19.5 16.5 118 DOME LAKE 8880 18.3 13.8 133 17.8 16.3 109 GRAVE SPRINGS 8550 11.3 11.1 102 11.8 12.7 93 HANSEN SAWMILL 8360 10.1 5.2 194 11.5 10.6 108 LITTLE GOOSE 8870 14.5 -M * 18.7 -M * MIDDLE POWDER 7760 13.3 14.6 91 13.3 15.3 87 POWDER RIVER PASS 9480 19.8 11.1 178 22.9 15.3 150 SOLDIER PARK 8720 11.1 -M * 12.2 -M * SUCKER CREEK 8880 17.6 13.5 130 19.4 16.8 115 TIE CREEK 6870 8.5 4.8 177 13.7 13.0 105 ----- ----- Basin wide percent of average 135 112 BELLE FOURCHE BLIND PARK 6890 10.9 5.2 210 20.7 13.7 151 COLE CANYON 5910 8.6 5.8 148 15.5 9.0 172 NORTH RAPID CREEK 6130 6.4 5.6 114 16.6 10.9 152 ----- ----- Basin wide percent of average 156 157 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.3 16.6 189 36.9 23.0 160 COLUMBINE 9160 39.7 22.3 178 43.2 28.7 151 DIVIDE PEAK 8880 31.1 20.2 154 36.0 23.8 151 ELK RIVER 8700 29.9 16.6 180 33.5 22.6 148 JOE WRIGHT 10120 46.1 24.9 185 46.6 29.4 159 NORTH FRENCH CREEK 10130 -M 34.3 * 61.5 28.9 213 OLD BATTLE 10000 55.5 36.4 152 47.2 39.2 120 SAGE CREEK BASIN 7850 19.7 11.7 168 23.7 13.8 172 SOUTH BRUSH CREEK 8440 24.5 11.9 206 29.6 19.6 151 TOWER 10500 70.6 51.8 136 47.7 44.3 108 WEBBER SPRINGS 9250 39.0 25.8 151 45.2 30.6 148 WILLOW CREEK PASS 9540 26.3 14.3 184 23.9 15.3 156 ----- ----- Basin wide percent of average 164 149 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 41.7 28.2 148 38.0 26.3 144 CASPER MTN. 7900 12.7 17.5 73 17.7 18.8 94 DEADMAN HILL 10220 30.2 19.5 155 29.7 20.4 146 DEER PARK 9700 21.9 19.5 112 25.6 26.3 97 LAPRELE CREEK 8375 14.6 8.1 180 17.6 15.9 111 RENO HILL 8400 18.0 15.5 116 21.5 19.5 110 ROACH 9700 27.6 18.7 148 30.8 21.9 141 SAND LAKE 10050 48.4 36.7 132 -M 28.6 * SOUTH PASS 9040 19.0 18.2 104 16.8 22.1 76 WINDY PEAK 7900 10.5 5.9 178 16.4 13.1 125 ----- ----- Basin wide percent of average 130 116 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 5.7 * 21.2 18.2 116 DIVIDE PEAK 8880 31.1 20.2 154 36.0 23.8 151 OLD BATTLE 10000 55.5 36.4 152 47.2 39.2 120 SANDSTONE RS 8150 22.8 10.8 211 33.0 21.4 154 WHISKEY PARK 8950 -M 30.7 * 47.2 33.1 143 ----- ----- Basin wide percent of average 162 136 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.3 14.3 135 19.3 15.5 125 BLIND BULL SUM 8650 42.9 28.3 152 28.7 24.8 116 EAST RIM DIVIDE 7930 17.4 13.7 127 16.6 13.6 122 ELKHART PARK G.S. 9400 17.4 13.4 130 17.2 15.6 110 GROS VENTRE SUMMIT 8750 18.4 13.8 133 18.7 15.0 125 GUNSIGHT PASS 9820 23.4 -M * 21.6 -M * KENDALL R.S. 7740 15.3 11.2 137 19.5 16.3 120 LOOMIS PARK 8240 25.3 15.2 166 26.4 19.6 135 NEW FORK LAKE 8340 15.1 9.4 161 14.0 13.1 107 POCKET CREEK 9360 16.9 -M * 18.4 -M * SNIDER BASIN 8060 24.3 13.5 180 22.9 18.3 125 SPRING CREEK DIVIDE 9000 43.9 28.8 152 39.8 29.8 134 TRIPLE PEAK 8500 41.7 24.8 168 42.1 28.2 149 ----- ----- Basin wide percent of average 151 126 LOWER GREEN RIVER HAMS FORK 7840 17.4 7.1 245 18.7 14.4 130 HEWINTA 9519 16.7 10.3 162 22.1 17.4 127 HICKERSON PARK 9145 5.2 6.6 79 12.5 9.9 126 HOLE-IN-ROCK 9150 9.1 5.6 163 14.2 9.4 151 INDIAN CREEK 9425 39.5 29.0 136 33.0 29.0 114 KELLEY R.S. 8180 25.9 15.2 170 29.1 23.2 125 STEEL CREEK PARK 10200 23.6 18.3 129 25.8 19.8 130 ----- ----- Basin wide percent of average 149 126 UPPER BEAR RIVER BUG LAKE 7950 36.4 19.4 188 35.8 22.0 163 HAYDEN FORK 9212 -M 14.2 * 36.9 24.6 150 KELLEY R.S. 8180 25.9 15.2 170 29.1 23.2 125 LILY LAKE 9156 26.6 12.3 216 27.9 20.7 135 MONTE CRISTO 8960 48.2 29.2 165 45.8 29.7 154 SALT RIVER SUMMIT 7760 20.8 11.9 175 26.4 21.3 124 TRIAL LAKE 9992 45.8 26.6 172 41.0 28.9 142 ----- ----- Basin wide percent of average 178 143 ----------------------------------------------------------------------------- -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.