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 THURSDAY: MARCH 17 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 19.7 17.5 113 22.3 20.3 110 COTTONWOOD CREEK 7670 25.1 21.9 115 32.2 25.4 127 GRAND TARGHEE 9260 43.3 -M * -M -M * GRANITE CREEK 6770 20.3 18.1 112 21.3 19.0 112 GRASSY LAKE 7265 36.4 33.3 109 37.9 33.9 112 GROS VENTRE SUMMIT 8750 14.0 13.1 107 13.5 12.0 113 GUNSIGHT PASS 9820 15.9 -M * 15.5 -M * LEWIS LAKE DIVIDE 7850 36.8 33.2 111 -M 34.7 * PHILLIPS BENCH 8200 29.1 26.9 108 29.1 27.2 107 SALT RIVER SUMMIT 7760 16.6 13.5 123 20.6 17.4 118 SNAKE RIVER STATION 6920 -M 18.5 * 24.5 21.1 116 SPRING CREEK DIVIDE 9000 32.3 24.7 131 30.5 24.7 123 THUMB DIVIDE 7980 20.5 17.7 116 19.1 17.7 108 TOGWOTEE PASS 9580 26.7 23.0 116 28.3 22.8 124 TWO OCEAN PLATEAU 9240 -M 25.9 * -M 25.9 * WILLOW CREEK 8380 33.6 28.3 119 37.6 29.9 126 ----- ----- Basin wide percent of average 115 117 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.0 22.2 108 23.1 18.8 123 BLACK BEAR 8170 43.7 36.8 119 40.8 37.4 109 CANYON 7870 -M 12.9 * 17.2 14.4 119 FISHER CREEK 9100 38.5 32.7 118 36.8 33.9 109 MADISON PLATEAU 7750 27.7 23.4 118 29.1 24.7 118 NORTHEAST ENTRANCE 7350 12.9 10.7 121 14.1 11.8 119 PARKER PEAK 9400 26.8 20.1 133 -M 15.1 * SYLVAN LAKE 8420 22.3 20.9 107 25.6 19.6 131 THUMB DIVIDE 7980 20.5 17.7 116 19.1 17.7 108 TWO OCEAN PLATEAU 9240 -M 25.9 * -M 25.9 * WHISKEY CREEK 6800 19.8 16.1 123 22.1 19.5 113 WHITE MILL 8700 26.0 22.7 115 26.2 25.2 104 WOLVERINE 7650 13.9 11.4 122 13.3 12.1 110 ----- ----- Basin wide percent of average 118 114 WIND RIVER BURROUGHS CREEK 8750 14.2 13.8 103 14.9 15.1 99 CASTLE CREEK 8400 6.5 -M * 7.2 -M * COLD SPRINGS 9630 7.9 8.2 96 7.6 9.4 81 DEER PARK 9700 17.2 15.3 112 20.2 20.1 100 HOBBS PARK 10100 13.5 13.3 102 11.6 11.2 104 LITTLE WARM 9370 11.7 10.8 108 11.8 12.1 98 SOUTH PASS 9040 16.2 15.5 105 14.0 16.7 84 ST. LAWRENCE ALT 8620 4.5 6.7 67 6.5 7.8 83 TOGWOTEE PASS 9580 26.7 23.0 116 28.3 22.8 124 TOWNSEND CREEK 8700 8.0 7.8 103 10.0 10.1 99 ----- ----- Basin wide percent of average 105 100 BIGHORN BASIN BALD MTN. 9380 20.4 17.8 115 16.9 15.8 107 BEAR TRAP MEADOW 8200 7.1 5.0 142 7.4 7.2 103 BLACKWATER 9780 24.4 22.7 107 23.6 19.0 124 BONE SPRINGS DIV 9350 17.4 14.6 119 14.4 13.1 110 EVENING STAR 9200 29.1 27.7 105 31.8 23.7 134 GRAVE SPRINGS 8550 7.7 8.3 93 7.8 8.8 89 KIRWIN 9550 10.6 10.3 103 11.6 10.2 114 MARQUETTE 8760 2.5 -M * 5.5 8.4 65 MIDDLE POWDER 7760 8.5 10.3 83 10.4 10.9 95 OWL CREEK 8975 5.2 4.8 108 5.1 5.0 102 POWDER RIVER PASS 9480 12.6 9.9 127 14.8 11.1 133 SHELL CREEK 9580 15.1 13.3 114 13.7 12.0 114 SYLVAN LAKE 8420 22.3 20.9 107 25.6 19.6 131 SYLVAN ROAD 7120 14.7 12.2 120 19.0 16.7 114 TIMBER CREEK 7950 3.6 4.9 73 4.4 6.3 70 YOUNTS PEAK 8350 16.4 16.0 103 14.2 15.0 95 ----- ----- Basin wide percent of average 108 112 SHOSHONE RIVER BLACKWATER 9780 24.4 22.7 107 23.6 19.0 124 EVENING STAR 9200 29.1 27.7 105 31.8 23.7 134 KIRWIN 9550 10.6 10.3 103 11.6 10.2 114 MARQUETTE 8760 2.5 -M * 5.5 8.4 65 SYLVAN LAKE 8420 22.3 20.9 107 25.6 19.6 131 SYLVAN ROAD 7120 14.7 12.2 120 19.0 16.7 114 YOUNTS PEAK 8350 16.4 16.0 103 14.2 15.0 95 ----- ----- Basin wide percent of average 107 117 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.1 5.0 142 7.4 7.2 103 BIG GOOSE 7990 7.1 8.9 80 8.8 7.5 117 BONE SPRINGS DIV 9350 17.4 14.6 119 14.4 13.1 110 BURGESS JUNCTION 7880 9.6 10.2 94 10.5 10.7 98 CLOUD PEAK RESERVOIR 9860 14.3 11.6 123 13.0 11.2 116 DOME LAKE 8880 11.7 10.8 108 11.6 11.5 101 GRAVE SPRINGS 8550 7.7 8.3 93 7.8 8.8 89 HANSEN SAWMILL 8360 6.4 5.9 108 7.0 7.2 97 LITTLE GOOSE 8870 8.0 -M * 12.3 -M * MIDDLE POWDER 7760 8.5 10.3 83 10.4 10.9 95 POWDER RIVER PASS 9480 12.6 9.9 127 14.8 11.1 133 SOLDIER PARK 8720 6.8 -M * 8.0 -M * SUCKER CREEK 8880 11.6 10.3 113 12.8 11.9 108 TIE CREEK 6870 6.0 5.9 102 8.8 8.8 100 ----- ----- Basin wide percent of average 107 106 BELLE FOURCHE BLIND PARK 6890 9.3 8.4 111 15.3 10.2 150 COLE CANYON 5910 7.6 6.3 121 10.9 6.1 179 NORTH RAPID CREEK 6130 8.3 7.6 109 13.1 8.0 164 ----- ----- Basin wide percent of average 113 162 UPPER N. PLATTE RIVER CINNABAR PARK 9574 22.7 17.2 132 23.2 18.7 124 COLUMBINE 9160 31.3 24.0 130 32.0 23.2 138 DIVIDE PEAK 8880 21.3 18.0 118 25.1 19.0 132 ELK RIVER 8700 23.0 18.0 128 24.4 18.0 136 JOE WRIGHT 10120 26.8 19.3 139 31.1 22.5 138 NORTH FRENCH CREEK 10130 40.3 26.0 155 32.3 22.6 143 OLD BATTLE 10000 38.4 29.6 130 29.1 31.9 91 SAGE CREEK BASIN 7850 19.2 10.4 185 17.1 11.0 155 SOUTH BRUSH CREEK 8440 17.1 11.9 144 20.2 14.8 136 TOWER 10500 50.3 41.7 121 46.1 35.4 130 WEBBER SPRINGS 9250 28.0 24.6 114 33.0 24.5 135 WILLOW CREEK PASS 9540 16.9 10.8 156 15.7 11.6 135 ----- ----- Basin wide percent of average 133 130 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 28.6 21.3 134 28.7 19.8 145 CASPER MTN. 7900 10.5 12.7 83 13.1 12.6 104 DEADMAN HILL 10220 19.3 14.6 132 19.8 15.1 131 DEER PARK 9700 17.2 15.3 112 20.2 20.1 100 LAPRELE CREEK 8375 11.7 10.1 116 13.0 11.3 115 RENO HILL 8400 13.2 12.2 108 15.4 13.1 118 ROACH 9700 18.6 15.5 120 21.9 16.9 130 SAND LAKE 10050 33.8 29.2 116 32.3 21.7 149 SOUTH PASS 9040 16.2 15.5 105 14.0 16.7 84 WINDY PEAK 7900 9.7 7.3 133 12.2 9.5 128 ----- ----- Basin wide percent of average 116 122 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 11.4 * 12.6 14.2 89 DIVIDE PEAK 8880 21.3 18.0 118 25.1 19.0 132 OLD BATTLE 10000 38.4 29.6 130 29.1 31.9 91 SANDSTONE RS 8150 14.7 14.4 102 23.4 17.4 134 WHISKEY PARK 8950 -M 27.7 * 36.2 26.2 138 ----- ----- Basin wide percent of average 120 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.9 13.5 103 14.0 12.5 112 BLIND BULL SUM 8650 28.7 26.1 110 20.5 20.8 99 EAST RIM DIVIDE 7930 14.6 12.3 119 12.4 11.3 110 ELKHART PARK G.S. 9400 12.4 12.5 99 12.2 12.2 100 GROS VENTRE SUMMIT 8750 14.0 13.1 107 13.5 12.0 113 GUNSIGHT PASS 9820 15.9 -M * 15.5 -M * KENDALL R.S. 7740 12.9 14.1 91 14.4 13.8 104 LOOMIS PARK 8240 19.2 16.4 117 19.2 16.3 118 NEW FORK LAKE 8340 12.0 10.6 113 10.8 10.6 102 POCKET CREEK 9360 10.9 -M * 13.2 -M * SNIDER BASIN 8060 19.5 13.8 141 18.4 15.0 123 SPRING CREEK DIVIDE 9000 32.3 24.7 131 30.5 24.7 123 TRIPLE PEAK 8500 29.3 23.4 125 30.9 23.1 134 ----- ----- Basin wide percent of average 116 114 LOWER GREEN RIVER HAMS FORK 7840 16.2 12.3 132 14.7 11.4 129 HEWINTA 9519 12.9 10.6 122 16.3 13.1 124 HICKERSON PARK 9145 8.2 6.6 124 9.5 7.0 136 HOLE-IN-ROCK 9150 7.9 6.4 123 9.9 6.6 150 INDIAN CREEK 9425 29.4 25.5 115 26.0 23.4 111 KELLEY R.S. 8180 19.7 15.8 125 22.6 18.9 120 STEEL CREEK PARK 10200 -M 14.4 * 18.9 14.5 130 ----- ----- Basin wide percent of average 122 124 UPPER BEAR RIVER BUG LAKE 7950 27.5 19.4 142 26.4 17.9 147 HAYDEN FORK 9212 21.7 15.1 144 27.4 19.1 143 KELLEY R.S. 8180 19.7 15.8 125 22.6 18.9 120 LILY LAKE 9156 19.9 12.1 164 20.6 15.9 130 MONTE CRISTO 8960 34.9 28.0 125 33.9 23.5 144 SALT RIVER SUMMIT 7760 16.6 13.5 123 20.6 17.4 118 TRIAL LAKE 9992 33.0 23.3 142 31.4 23.0 137 ----- ----- Basin wide percent of average 136 135 ----------------------------------------------------------------------------- -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.