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: FEBRUARY 28 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.2 15.8 103 19.5 18.3 107 COTTONWOOD CREEK 7670 21.5 18.1 119 28.9 22.7 127 GRAND TARGHEE 9260 38.6 -M * 26.2 -M * GRANITE CREEK 6770 16.7 15.8 106 18.5 17.2 108 GRASSY LAKE 7265 29.7 29.1 102 32.0 30.6 105 GROS VENTRE SUMMIT 8750 12.3 11.3 109 11.9 10.6 112 GUNSIGHT PASS 9820 13.7 -M * 13.7 -M * LEWIS LAKE DIVIDE 7850 28.4 29.2 97 28.1 31.1 90 PHILLIPS BENCH 8200 24.6 23.6 104 25.4 24.3 105 SALT RIVER SUMMIT 7760 14.1 12.0 118 18.0 15.6 115 SNAKE RIVER STATION 6920 -M 16.3 * 21.0 19.2 109 SPRING CREEK DIVIDE 9000 28.2 21.8 129 27.3 22.2 123 THUMB DIVIDE 7980 16.4 15.1 109 16.3 15.8 103 TOGWOTEE PASS 9580 23.2 20.5 113 24.6 20.4 121 TWO OCEAN PLATEAU 9240 -M 23.0 * -M 23.1 * WILLOW CREEK 8380 27.4 25.0 110 32.2 26.6 121 ----- ----- Basin wide percent of average 109 111 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 20.3 19.6 104 19.5 16.9 115 BLACK BEAR 8170 35.1 32.6 108 33.9 32.8 103 CANYON 7870 13.5 11.3 119 14.4 12.9 112 FISHER CREEK 9100 32.2 29.3 110 30.9 30.2 102 MADISON PLATEAU 7750 22.2 20.6 108 24.0 21.8 110 NORTHEAST ENTRANCE 7350 10.9 9.7 112 12.4 10.7 116 PARKER PEAK 9400 23.0 18.1 127 20.5 13.5 152 SYLVAN LAKE 8420 19.4 18.7 104 22.7 17.7 128 THUMB DIVIDE 7980 16.4 15.1 109 16.3 15.8 103 TWO OCEAN PLATEAU 9240 -M 23.0 * -M 23.1 * WHISKEY CREEK 6800 15.9 14.2 112 18.5 17.1 108 WHITE MILL 8700 21.9 20.0 110 22.3 22.4 100 WOLVERINE 7650 12.4 10.6 117 11.8 11.1 106 ----- ----- Basin wide percent of average 111 111 WIND RIVER BURROUGHS CREEK 8750 12.1 12.6 96 12.6 13.5 93 CASTLE CREEK 8400 5.5 -M * 6.1 -M * COLD SPRINGS 9630 7.0 7.2 97 6.7 8.3 81 DEER PARK 9700 16.2 14.5 112 18.6 17.6 106 HOBBS PARK 10100 12.1 11.9 102 10.7 9.8 109 LITTLE WARM 9370 9.8 9.5 103 9.7 10.8 90 SOUTH PASS 9040 15.1 14.0 108 13.1 14.8 89 ST. LAWRENCE ALT 8620 4.2 5.9 71 5.7 6.9 83 TOGWOTEE PASS 9580 23.2 20.5 113 24.6 20.4 121 TOWNSEND CREEK 8700 7.4 6.9 107 9.5 8.8 108 ----- ----- Basin wide percent of average 104 100 BIGHORN BASIN BALD MTN. 9380 19.3 15.9 121 15.8 13.9 114 BEAR TRAP MEADOW 8200 6.2 4.3 144 6.6 6.3 105 BLACKWATER 9780 20.6 20.3 101 20.0 17.0 118 BONE SPRINGS DIV 9350 15.7 13.1 120 12.8 11.5 111 EVENING STAR 9200 25.6 24.8 103 28.1 21.5 131 GRAVE SPRINGS 8550 6.6 7.2 92 6.8 7.7 88 KIRWIN 9550 9.0 9.1 99 10.0 9.1 110 MARQUETTE 8760 1.8 6.9 26 5.2 7.4 70 MIDDLE POWDER 7760 7.6 8.9 85 9.2 9.5 97 OWL CREEK 8975 4.5 4.1 110 4.4 4.4 100 POWDER RIVER PASS 9480 11.4 8.7 131 13.2 9.9 133 SHELL CREEK 9580 13.5 11.7 115 12.2 10.7 114 SYLVAN LAKE 8420 19.4 18.7 104 22.7 17.7 128 SYLVAN ROAD 7120 13.4 11.3 119 17.1 15.5 110 TIMBER CREEK 7950 3.0 4.2 71 3.7 5.3 70 YOUNTS PEAK 8350 13.6 14.6 93 11.7 13.5 87 ----- ----- Basin wide percent of average 104 110 SHOSHONE RIVER BLACKWATER 9780 20.6 20.3 101 20.0 17.0 118 EVENING STAR 9200 25.6 24.8 103 28.1 21.5 131 KIRWIN 9550 9.0 9.1 99 10.0 9.1 110 MARQUETTE 8760 1.8 6.9 26 5.2 7.4 70 SYLVAN LAKE 8420 19.4 18.7 104 22.7 17.7 128 SYLVAN ROAD 7120 13.4 11.3 119 17.1 15.5 110 YOUNTS PEAK 8350 13.6 14.6 93 11.7 13.5 87 ----- ----- Basin wide percent of average 98 113 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.2 4.3 144 6.6 6.3 105 BIG GOOSE 7990 6.0 7.6 79 7.8 6.7 116 BONE SPRINGS DIV 9350 15.7 13.1 120 12.8 11.5 111 BURGESS JUNCTION 7880 8.7 9.0 97 9.6 9.4 102 CLOUD PEAK RESERVOIR 9860 12.7 9.9 128 12.0 9.7 124 DOME LAKE 8880 9.8 9.5 103 10.2 10.1 101 GRAVE SPRINGS 8550 6.6 7.2 92 6.8 7.7 88 HANSEN SAWMILL 8360 5.1 5.1 100 5.8 6.2 94 LITTLE GOOSE 8870 6.8 -M * 11.0 -M * MIDDLE POWDER 7760 7.6 8.9 85 9.2 9.5 97 POWDER RIVER PASS 9480 11.4 8.7 131 13.2 9.9 133 SOLDIER PARK 8720 5.4 -M * 6.8 -M * SUCKER CREEK 8880 10.1 9.1 111 11.3 10.4 109 TIE CREEK 6870 5.6 4.9 114 8.1 7.8 104 ----- ----- Basin wide percent of average 108 108 BELLE FOURCHE BLIND PARK 6890 8.6 7.0 123 14.4 9.2 157 COLE CANYON 5910 6.8 5.6 121 10.4 5.4 193 NORTH RAPID CREEK 6130 8.0 6.7 119 12.3 7.4 166 ----- ----- Basin wide percent of average 121 169 UPPER N. PLATTE RIVER CINNABAR PARK 9574 20.9 15.8 132 21.8 17.1 127 COLUMBINE 9160 27.5 21.6 127 29.2 20.6 142 DIVIDE PEAK 8880 18.5 15.4 120 22.6 16.8 135 ELK RIVER 8700 20.9 15.9 131 22.3 15.9 140 JOE WRIGHT 10120 23.6 17.0 139 29.0 19.9 146 NORTH FRENCH CREEK 10130 35.9 22.3 161 32.2 19.9 162 OLD BATTLE 10000 33.9 25.8 131 27.8 28.0 99 SAGE CREEK BASIN 7850 17.0 8.9 191 15.7 9.7 162 SOUTH BRUSH CREEK 8440 15.0 9.8 153 18.3 13.1 140 TOWER 10500 44.8 37.1 121 45.1 31.5 143 WEBBER SPRINGS 9250 25.3 20.9 121 30.3 21.8 139 WILLOW CREEK PASS 9540 15.4 9.5 162 14.6 10.2 143 ----- ----- Basin wide percent of average 136 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.0 18.7 134 25.7 17.2 149 CASPER MTN. 7900 9.3 11.1 84 12.1 10.9 111 DEADMAN HILL 10220 17.8 12.8 139 18.8 13.1 144 DEER PARK 9700 16.2 14.5 112 18.6 17.6 106 LAPRELE CREEK 8375 10.5 8.8 119 11.8 9.9 119 RENO HILL 8400 11.9 10.2 117 13.9 11.3 123 ROACH 9700 17.2 13.7 126 20.9 14.6 143 SAND LAKE 10050 30.1 24.8 121 28.7 19.0 151 SOUTH PASS 9040 15.1 14.0 108 13.1 14.8 89 WINDY PEAK 7900 8.7 5.9 147 11.1 8.4 132 ----- ----- Basin wide percent of average 120 128 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 9.5 * 11.0 12.2 90 DIVIDE PEAK 8880 18.5 15.4 120 22.6 16.8 135 OLD BATTLE 10000 33.9 25.8 131 27.8 28.0 99 SANDSTONE RS 8150 12.2 12.3 99 -M 15.4 * WHISKEY PARK 8950 -M 23.4 * 33.0 23.1 143 ----- ----- Basin wide percent of average 121 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.3 11.9 103 12.6 11.2 113 BLIND BULL SUM 8650 23.3 22.7 103 16.6 18.8 88 EAST RIM DIVIDE 7930 12.3 10.9 113 10.6 10.1 105 ELKHART PARK G.S. 9400 10.5 10.9 96 10.5 10.8 97 GROS VENTRE SUMMIT 8750 12.3 11.3 109 11.9 10.6 112 GUNSIGHT PASS 9820 13.7 -M * 13.7 -M * KENDALL R.S. 7740 10.7 12.2 88 12.4 12.3 101 LOOMIS PARK 8240 16.0 14.2 113 16.7 14.6 114 NEW FORK LAKE 8340 10.2 9.5 107 9.4 9.5 99 POCKET CREEK 9360 9.6 -M * 12.1 -M * SNIDER BASIN 8060 16.7 12.3 136 16.4 13.6 121 SPRING CREEK DIVIDE 9000 28.2 21.8 129 27.3 22.2 123 TRIPLE PEAK 8500 24.5 20.5 120 26.7 20.4 131 ----- ----- Basin wide percent of average 112 111 LOWER GREEN RIVER HAMS FORK 7840 13.9 10.8 129 13.0 10.2 127 HEWINTA 9519 10.6 8.9 119 14.0 11.4 123 HICKERSON PARK 9145 6.0 5.8 103 7.6 6.1 125 HOLE-IN-ROCK 9150 6.7 5.6 120 8.4 5.7 147 INDIAN CREEK 9425 25.8 21.9 118 23.3 20.8 112 KELLEY R.S. 8180 17.2 13.8 125 20.0 17.0 118 STEEL CREEK PARK 10200 14.0 12.4 113 16.8 12.7 132 ----- ----- Basin wide percent of average 119 123 UPPER BEAR RIVER BUG LAKE 7950 24.2 16.8 144 22.8 15.9 143 HAYDEN FORK 9212 19.5 12.9 151 25.2 16.8 150 KELLEY R.S. 8180 17.2 13.8 125 20.0 17.0 118 LILY LAKE 9156 16.4 10.6 155 18.5 14.1 131 MONTE CRISTO 8960 29.3 24.3 121 29.6 20.8 142 SALT RIVER SUMMIT 7760 14.1 12.0 118 18.0 15.6 115 TRIAL LAKE 9992 29.7 20.3 146 29.7 20.2 147 ----- ----- Basin wide percent of average 136 136 ----------------------------------------------------------------------------- -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.