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 SUNDAY: FEBRUARY 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 15.0 14.9 101 17.9 17.3 103 COTTONWOOD CREEK 7670 20.2 16.8 120 27.3 21.4 128 GRAND TARGHEE 9260 36.1 -M * 25.9 -M * GRANITE CREEK 6770 15.2 14.8 103 17.2 16.1 107 GRASSY LAKE 7265 26.2 27.3 96 29.2 29.0 101 GROS VENTRE SUMMIT 8750 11.7 10.7 109 11.4 10.0 114 GUNSIGHT PASS 9820 13.0 -M * 13.1 -M * LEWIS LAKE DIVIDE 7850 25.5 27.5 93 26.2 29.2 90 PHILLIPS BENCH 8200 23.0 22.1 104 24.0 22.9 105 SALT RIVER SUMMIT 7760 12.8 11.3 113 17.0 14.7 116 SNAKE RIVER STATION 6920 -M 15.3 * -M 18.2 * SPRING CREEK DIVIDE 9000 26.2 20.5 128 25.8 21.0 123 THUMB DIVIDE 7980 15.0 14.1 106 15.2 14.8 103 TOGWOTEE PASS 9580 22.0 19.4 113 23.5 19.3 122 TWO OCEAN PLATEAU 9240 24.9 21.9 114 20.9 21.6 97 WILLOW CREEK 8380 25.0 23.6 106 30.3 25.1 121 ----- ----- Basin wide percent of average 107 109 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 19.2 18.9 102 18.6 16.0 116 BLACK BEAR 8170 32.5 30.7 106 31.8 30.7 104 CANYON 7870 12.4 10.7 116 13.6 12.2 111 FISHER CREEK 9100 30.2 27.9 108 29.5 28.4 104 MADISON PLATEAU 7750 20.4 19.5 105 22.4 20.5 109 NORTHEAST ENTRANCE 7350 10.1 9.2 110 11.8 10.2 116 PARKER PEAK 9400 21.7 17.1 127 -M 12.8 * SYLVAN LAKE 8420 17.7 17.7 100 20.9 16.9 124 THUMB DIVIDE 7980 15.0 14.1 106 15.2 14.8 103 TWO OCEAN PLATEAU 9240 24.9 21.9 114 20.9 21.6 97 WHISKEY CREEK 6800 14.4 13.5 107 17.2 16.1 107 WHITE MILL 8700 20.9 19.1 109 21.4 21.2 101 WOLVERINE 7650 11.6 10.1 115 11.0 10.5 105 ----- ----- Basin wide percent of average 109 107 WIND RIVER BURROUGHS CREEK 8750 11.2 11.9 94 11.7 12.9 91 CASTLE CREEK 8400 4.9 -M * 5.6 -M * COLD SPRINGS 9630 6.6 6.8 97 6.5 7.9 82 DEER PARK 9700 15.1 13.9 109 16.5 16.7 99 HOBBS PARK 10100 11.0 11.3 97 9.6 9.3 103 LITTLE WARM 9370 8.9 8.9 100 9.2 10.2 90 SOUTH PASS 9040 13.0 13.4 97 11.1 14.1 79 ST. LAWRENCE ALT 8620 4.0 5.5 73 5.3 6.6 80 TOGWOTEE PASS 9580 22.0 19.4 113 23.5 19.3 122 TOWNSEND CREEK 8700 6.8 6.6 103 8.4 8.3 101 ----- ----- Basin wide percent of average 101 97 BIGHORN BASIN BALD MTN. 9380 18.8 15.1 125 15.4 13.3 116 BEAR TRAP MEADOW 8200 6.1 4.1 149 6.5 6.1 107 BLACKWATER 9780 19.3 19.2 101 18.8 16.2 116 BONE SPRINGS DIV 9350 15.1 12.3 123 12.5 10.9 115 EVENING STAR 9200 24.1 23.4 103 26.8 20.4 131 GRAVE SPRINGS 8550 6.4 6.6 97 6.6 7.2 92 KIRWIN 9550 8.7 8.7 100 9.6 8.6 112 MARQUETTE 8760 1.7 6.6 26 4.8 7.0 69 MIDDLE POWDER 7760 7.3 8.3 88 9.0 9.1 99 OWL CREEK 8975 4.3 3.9 110 4.2 4.2 100 POWDER RIVER PASS 9480 11.0 8.2 134 12.9 9.4 137 SHELL CREEK 9580 13.2 11.1 119 11.9 10.3 116 SYLVAN LAKE 8420 17.7 17.7 100 20.9 16.9 124 SYLVAN ROAD 7120 11.8 10.6 111 15.6 14.9 105 TIMBER CREEK 7950 2.7 4.0 68 3.5 5.1 69 YOUNTS PEAK 8350 12.9 13.9 93 11.2 12.8 88 ----- ----- Basin wide percent of average 104 110 SHOSHONE RIVER BLACKWATER 9780 19.3 19.2 101 18.8 16.2 116 EVENING STAR 9200 24.1 23.4 103 26.8 20.4 131 KIRWIN 9550 8.7 8.7 100 9.6 8.6 112 MARQUETTE 8760 1.7 6.6 26 4.8 7.0 69 SYLVAN LAKE 8420 17.7 17.7 100 20.9 16.9 124 SYLVAN ROAD 7120 11.8 10.6 111 15.6 14.9 105 YOUNTS PEAK 8350 12.9 13.9 93 11.2 12.8 88 ----- ----- Basin wide percent of average 96 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.1 4.1 149 6.5 6.1 107 BIG GOOSE 7990 5.8 7.1 82 7.4 6.4 116 BONE SPRINGS DIV 9350 15.1 12.3 123 12.5 10.9 115 BURGESS JUNCTION 7880 8.5 8.4 101 9.2 8.9 103 CLOUD PEAK RESERVOIR 9860 12.2 9.3 131 11.4 9.2 124 DOME LAKE 8880 9.1 9.1 100 9.8 9.7 101 GRAVE SPRINGS 8550 6.4 6.6 97 6.6 7.2 92 HANSEN SAWMILL 8360 5.0 4.8 104 5.5 5.9 93 LITTLE GOOSE 8870 6.6 -M * 10.7 -M * MIDDLE POWDER 7760 7.3 8.3 88 9.0 9.1 99 POWDER RIVER PASS 9480 11.0 8.2 134 12.9 9.4 137 SOLDIER PARK 8720 5.1 -M * 6.6 -M * SUCKER CREEK 8880 10.0 8.5 118 11.0 9.9 111 TIE CREEK 6870 5.2 4.6 113 7.6 7.5 101 ----- ----- Basin wide percent of average 111 109 BELLE FOURCHE BLIND PARK 6890 7.8 6.2 126 13.5 8.7 155 COLE CANYON 5910 6.3 5.3 119 9.5 5.2 183 NORTH RAPID CREEK 6130 7.3 6.2 118 11.4 7.0 163 ----- ----- Basin wide percent of average 121 165 UPPER N. PLATTE RIVER CINNABAR PARK 9574 20.5 15.1 136 21.9 16.3 134 COLUMBINE 9160 26.6 20.2 132 27.8 19.4 143 DIVIDE PEAK 8880 16.6 14.6 114 20.4 15.8 129 ELK RIVER 8700 19.4 14.9 130 21.2 14.9 142 JOE WRIGHT 10120 22.5 16.1 140 28.1 18.7 150 NORTH FRENCH CREEK 10130 34.3 21.0 163 -M 18.8 * OLD BATTLE 10000 33.1 24.1 137 28.0 26.2 107 SAGE CREEK BASIN 7850 15.7 8.5 185 14.5 9.2 158 SOUTH BRUSH CREEK 8440 14.0 9.0 156 17.2 12.5 138 TOWER 10500 43.2 35.1 123 43.2 29.6 146 WEBBER SPRINGS 9250 23.5 19.4 121 28.2 20.5 138 WILLOW CREEK PASS 9540 14.3 8.9 161 13.7 9.6 143 ----- ----- Basin wide percent of average 137 137 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.8 17.7 129 23.6 16.2 146 CASPER MTN. 7900 8.8 10.5 84 11.1 10.3 108 DEADMAN HILL 10220 16.5 12.1 136 17.6 12.2 144 DEER PARK 9700 15.1 13.9 109 16.5 16.7 99 LAPRELE CREEK 8375 9.6 8.3 116 11.0 9.3 118 RENO HILL 8400 11.0 9.6 115 13.0 10.6 123 ROACH 9700 16.5 13.0 127 19.9 13.6 146 SAND LAKE 10050 28.2 23.1 122 26.7 18.0 148 SOUTH PASS 9040 13.0 13.4 97 11.1 14.1 79 WINDY PEAK 7900 7.7 5.5 140 10.1 7.9 128 ----- ----- Basin wide percent of average 117 125 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 8.9 * 11.1 11.4 97 DIVIDE PEAK 8880 16.6 14.6 114 20.4 15.8 129 OLD BATTLE 10000 33.1 24.1 137 28.0 26.2 107 SANDSTONE RS 8150 11.3 11.5 98 -M 14.5 * WHISKEY PARK 8950 -M 21.9 * 30.8 21.9 141 ----- ----- Basin wide percent of average 122 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.0 11.2 98 11.3 10.5 108 BLIND BULL SUM 8650 22.2 21.4 104 15.8 17.8 89 EAST RIM DIVIDE 7930 11.6 10.2 114 10.1 9.4 107 ELKHART PARK G.S. 9400 9.9 10.3 96 9.9 10.2 97 GROS VENTRE SUMMIT 8750 11.7 10.7 109 11.4 10.0 114 GUNSIGHT PASS 9820 13.0 -M * 13.1 -M * KENDALL R.S. 7740 9.7 11.4 85 11.4 11.5 99 LOOMIS PARK 8240 14.6 13.3 110 15.6 13.7 114 NEW FORK LAKE 8340 9.6 9.0 107 8.9 9.0 99 POCKET CREEK 9360 8.3 -M * 10.9 -M * SNIDER BASIN 8060 15.4 11.5 134 15.3 12.8 120 SPRING CREEK DIVIDE 9000 26.2 20.5 128 25.8 21.0 123 TRIPLE PEAK 8500 23.2 19.4 120 25.0 19.1 131 ----- ----- Basin wide percent of average 111 111 LOWER GREEN RIVER HAMS FORK 7840 12.5 10.0 125 12.1 9.7 125 HEWINTA 9519 9.9 8.3 119 13.4 10.7 125 HICKERSON PARK 9145 6.2 5.4 115 8.0 5.8 138 HOLE-IN-ROCK 9150 6.7 5.2 129 8.3 5.4 154 INDIAN CREEK 9425 23.9 20.5 117 21.9 19.6 112 KELLEY R.S. 8180 15.8 12.8 123 18.7 16.0 117 STEEL CREEK PARK 10200 13.6 11.5 118 16.2 11.9 136 ----- ----- Basin wide percent of average 120 125 UPPER BEAR RIVER BUG LAKE 7950 21.3 15.8 135 21.9 15.0 146 HAYDEN FORK 9212 17.5 12.0 146 23.3 15.8 147 KELLEY R.S. 8180 15.8 12.8 123 18.7 16.0 117 LILY LAKE 9156 14.8 9.9 149 17.3 13.2 131 MONTE CRISTO 8960 26.0 22.5 116 26.7 19.5 137 SALT RIVER SUMMIT 7760 12.8 11.3 113 17.0 14.7 116 TRIAL LAKE 9992 27.2 18.9 144 26.6 18.8 141 ----- ----- Basin wide percent of average 131 134 ----------------------------------------------------------------------------- -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.