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 FRIDAY: APRIL 22 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 26.0 15.2 171 30.2 23.6 128 COTTONWOOD CREEK 7670 35.9 22.4 160 43.3 30.7 141 GRAND TARGHEE 9260 59.6 -M * 44.7 -M * GRANITE CREEK 6770 26.3 15.4 171 29.5 21.6 137 GRASSY LAKE 7265 48.1 36.1 133 50.0 39.6 126 GROS VENTRE SUMMIT 8750 18.4 14.3 129 18.7 14.6 128 GUNSIGHT PASS 9820 23.1 -M * 21.5 -M * LEWIS LAKE DIVIDE 7850 53.1 36.3 146 43.8 40.4 108 PHILLIPS BENCH 8200 39.3 30.6 128 40.3 32.0 126 SALT RIVER SUMMIT 7760 20.5 13.2 155 26.1 20.9 125 SNAKE RIVER STATION 6920 -M 15.6 * 32.4 24.7 131 SPRING CREEK DIVIDE 9000 43.1 28.9 149 38.5 29.2 132 THUMB DIVIDE 7980 28.5 17.4 164 25.9 21.1 123 TOGWOTEE PASS 9580 37.0 27.4 135 38.3 27.7 138 TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.8 * WILLOW CREEK 8380 46.5 31.8 146 49.8 36.1 138 ----- ----- Basin wide percent of average 146 129 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 31.9 25.6 125 30.6 22.5 136 BLACK BEAR 8170 55.0 40.8 135 53.1 44.5 119 CANYON 7870 20.7 12.8 162 22.2 17.1 130 FISHER CREEK 9100 49.6 37.6 132 -M 40.3 * MADISON PLATEAU 7750 35.8 25.6 140 37.9 29.6 128 NORTHEAST ENTRANCE 7350 16.7 9.3 180 19.0 14.1 135 PARKER PEAK 9400 36.5 23.8 153 -M 18.5 * SYLVAN LAKE 8420 31.5 24.1 131 35.2 23.6 149 THUMB DIVIDE 7980 28.5 17.4 164 25.9 21.1 123 TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.8 * WHISKEY CREEK 6800 23.4 17.1 137 27.6 23.3 118 WHITE MILL 8700 34.8 26.3 132 34.5 30.0 115 WOLVERINE 7650 17.6 9.5 185 17.8 14.5 123 ----- ----- Basin wide percent of average 142 126 WIND RIVER BURROUGHS CREEK 8750 20.6 14.7 140 21.4 18.4 116 CASTLE CREEK 8400 8.2 -M * 10.5 -M * COLD SPRINGS 9630 9.5 5.5 173 11.4 12.9 88 DEER PARK 9700 21.7 17.9 121 25.4 25.3 100 HOBBS PARK 10100 18.6 17.1 109 16.4 15.6 105 LITTLE WARM 9370 15.4 12.0 128 15.9 15.7 101 SOUTH PASS 9040 19.0 17.8 107 16.6 21.4 78 ST. LAWRENCE ALT 8620 5.3 6.5 82 9.7 11.0 88 TOGWOTEE PASS 9580 37.0 27.4 135 38.3 27.7 138 TOWNSEND CREEK 8700 9.6 9.5 101 13.0 14.3 91 ----- ----- Basin wide percent of average 122 104 BIGHORN BASIN BALD MTN. 9380 29.5 22.6 131 24.0 20.0 120 BEAR TRAP MEADOW 8200 11.3 3.6 314 11.5 10.1 114 BLACKWATER 9780 35.9 27.4 131 33.8 23.5 144 BONE SPRINGS DIV 9350 26.1 17.7 147 21.3 17.1 125 EVENING STAR 9200 40.4 32.4 125 -M 28.6 * GRAVE SPRINGS 8550 10.7 11.0 97 11.3 12.2 93 KIRWIN 9550 16.6 12.6 132 17.3 13.2 131 MARQUETTE 8760 6.8 -M * 9.7 12.4 78 MIDDLE POWDER 7760 12.6 14.3 88 13.0 14.7 88 OWL CREEK 8975 8.0 4.5 178 8.7 7.4 118 POWDER RIVER PASS 9480 19.6 11.6 169 22.5 14.7 153 SHELL CREEK 9580 22.5 16.4 137 20.2 15.7 129 SYLVAN LAKE 8420 31.5 24.1 131 35.2 23.6 149 SYLVAN ROAD 7120 18.4 10.3 179 26.2 19.6 134 TIMBER CREEK 7950 6.3 5.1 124 7.9 9.3 85 YOUNTS PEAK 8350 23.1 18.1 128 20.5 18.0 114 ----- ----- Basin wide percent of average 135 122 SHOSHONE RIVER BLACKWATER 9780 35.9 27.4 131 33.8 23.5 144 EVENING STAR 9200 40.4 32.4 125 -M 28.6 * KIRWIN 9550 16.6 12.6 132 17.3 13.2 131 MARQUETTE 8760 6.8 -M * 9.7 12.4 78 SYLVAN LAKE 8420 31.5 24.1 131 35.2 23.6 149 SYLVAN ROAD 7120 18.4 10.3 179 26.2 19.6 134 YOUNTS PEAK 8350 23.1 18.1 128 20.5 18.0 114 ----- ----- Basin wide percent of average 133 129 POWDER-TONGUE BEAR TRAP MEADOW 8200 11.3 3.6 314 11.5 10.1 114 BIG GOOSE 7990 11.7 12.5 94 13.6 11.7 116 BONE SPRINGS DIV 9350 26.1 17.7 147 21.3 17.1 125 BURGESS JUNCTION 7880 13.8 13.3 104 14.8 14.4 103 CLOUD PEAK RESERVOIR 9860 20.2 15.8 128 19.0 15.7 121 DOME LAKE 8880 17.4 13.7 127 16.9 15.6 108 GRAVE SPRINGS 8550 10.7 11.0 97 11.3 12.2 93 HANSEN SAWMILL 8360 9.9 5.4 183 11.1 10.0 111 LITTLE GOOSE 8870 13.6 -M * 17.9 -M * MIDDLE POWDER 7760 12.6 14.3 88 13.0 14.7 88 POWDER RIVER PASS 9480 19.6 11.6 169 22.5 14.7 153 SOLDIER PARK 8720 10.8 -M * 11.9 -M * SUCKER CREEK 8880 16.5 13.5 122 18.2 16.1 113 TIE CREEK 6870 8.1 5.2 156 13.0 12.3 106 ----- ----- Basin wide percent of average 129 113 BELLE FOURCHE BLIND PARK 6890 9.6 6.5 148 18.9 13.1 144 COLE CANYON 5910 7.7 6.6 117 14.6 8.3 176 NORTH RAPID CREEK 6130 6.2 7.5 83 15.9 10.2 156 ----- ----- Basin wide percent of average 114 156 UPPER N. PLATTE RIVER CINNABAR PARK 9574 31.3 17.3 181 36.9 22.4 165 COLUMBINE 9160 39.3 23.6 167 41.6 28.1 148 DIVIDE PEAK 8880 31.5 20.8 151 35.6 23.2 153 ELK RIVER 8700 29.2 18.2 160 32.5 22.0 148 JOE WRIGHT 10120 43.0 24.5 176 44.2 28.5 155 NORTH FRENCH CREEK 10130 -M 33.7 * -M 28.1 * OLD BATTLE 10000 54.8 35.7 154 47.1 38.3 123 SAGE CREEK BASIN 7850 20.6 12.1 170 23.4 13.5 173 SOUTH BRUSH CREEK 8440 24.3 12.7 191 -M 18.9 * TOWER 10500 68.2 51.0 134 47.6 43.2 110 WEBBER SPRINGS 9250 38.5 26.0 148 44.2 29.9 148 WILLOW CREEK PASS 9540 25.1 14.1 178 22.5 14.8 152 ----- ----- Basin wide percent of average 159 142 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 40.1 27.6 145 38.0 25.5 149 CASPER MTN. 7900 12.4 17.5 71 16.9 17.9 94 DEADMAN HILL 10220 28.7 19.1 150 28.6 19.7 145 DEER PARK 9700 21.7 17.9 121 25.4 25.3 100 LAPRELE CREEK 8375 14.8 9.1 163 17.4 15.2 114 RENO HILL 8400 17.7 16.0 111 21.0 18.6 113 ROACH 9700 26.8 18.5 145 29.9 21.2 141 SAND LAKE 10050 47.4 36.0 132 -M 27.7 * SOUTH PASS 9040 19.0 17.8 107 16.6 21.4 78 WINDY PEAK 7900 11.3 6.9 164 16.2 12.5 130 ----- ----- Basin wide percent of average 129 118 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 7.0 * 20.5 17.8 115 DIVIDE PEAK 8880 31.5 20.8 151 35.6 23.2 153 OLD BATTLE 10000 54.8 35.7 154 47.1 38.3 123 SANDSTONE RS 8150 -M 12.1 * -M 20.8 * WHISKEY PARK 8950 -M 30.7 * -M 32.2 * ----- ----- Basin wide percent of average 153* 130 UPPER GREEN RIVER BIG SANDY OPENING 9080 19.0 14.9 128 19.2 15.1 127 BLIND BULL SUM 8650 42.5 28.7 148 28.3 24.4 116 EAST RIM DIVIDE 7930 17.9 14.0 128 16.6 13.3 125 ELKHART PARK G.S. 9400 17.4 13.8 126 17.2 15.1 114 GROS VENTRE SUMMIT 8750 18.4 14.3 129 18.7 14.6 128 GUNSIGHT PASS 9820 23.1 -M * 21.5 -M * KENDALL R.S. 7740 15.6 12.4 126 19.5 15.9 123 LOOMIS PARK 8240 25.1 16.2 155 26.1 19.2 136 NEW FORK LAKE 8340 14.9 10.4 143 13.9 12.7 109 POCKET CREEK 9360 17.0 -M * 18.4 -M * SNIDER BASIN 8060 23.6 14.3 165 22.8 17.9 127 SPRING CREEK DIVIDE 9000 43.1 28.9 149 38.5 29.2 132 TRIPLE PEAK 8500 41.5 25.6 162 41.4 27.5 151 ----- ----- Basin wide percent of average 144 128 LOWER GREEN RIVER HAMS FORK 7840 16.9 8.4 201 18.4 13.9 132 HEWINTA 9519 15.9 11.4 139 21.6 16.9 128 HICKERSON PARK 9145 6.2 7.5 83 12.4 9.5 131 HOLE-IN-ROCK 9150 8.8 6.5 135 13.9 9.0 154 INDIAN CREEK 9425 38.9 29.5 132 32.6 28.4 115 KELLEY R.S. 8180 25.6 16.3 157 28.7 22.7 126 STEEL CREEK PARK 10200 22.7 17.9 127 23.9 19.2 124 ----- ----- Basin wide percent of average 138 127 UPPER BEAR RIVER BUG LAKE 7950 -M 20.7 * -M 21.5 * HAYDEN FORK 9212 28.2 15.4 183 35.6 24.0 148 KELLEY R.S. 8180 25.6 16.3 157 28.7 22.7 126 LILY LAKE 9156 25.9 13.5 192 27.1 20.2 134 MONTE CRISTO 8960 47.1 30.0 157 44.9 28.8 156 SALT RIVER SUMMIT 7760 20.5 13.2 155 26.1 20.9 125 TRIAL LAKE 9992 44.7 26.6 168 40.1 28.1 143 ----- ----- Basin wide percent of average 167 140 ----------------------------------------------------------------------------- -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.