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 6 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.8 18.0 132 25.8 22.1 117 COTTONWOOD CREEK 7670 30.5 24.4 125 37.1 28.5 130 GRAND TARGHEE 9260 50.1 -M * 38.4 -M * GRANITE CREEK 6770 23.1 18.3 126 25.2 20.5 123 GRASSY LAKE 7265 41.9 36.8 114 43.5 37.2 117 GROS VENTRE SUMMIT 8750 15.1 14.6 103 15.1 13.4 113 GUNSIGHT PASS 9820 19.0 -M * 18.0 -M * LEWIS LAKE DIVIDE 7850 43.7 36.4 120 -M 38.0 * PHILLIPS BENCH 8200 35.1 29.9 117 34.8 30.0 116 SALT RIVER SUMMIT 7760 18.0 14.9 121 22.7 19.5 116 SNAKE RIVER STATION 6920 -M 19.0 * 28.0 23.0 122 SPRING CREEK DIVIDE 9000 37.3 27.6 135 34.1 27.4 124 THUMB DIVIDE 7980 23.2 19.3 120 21.0 19.6 107 TOGWOTEE PASS 9580 30.7 25.8 119 32.3 25.6 126 TWO OCEAN PLATEAU 9240 -M 29.2 * -M 28.7 * WILLOW CREEK 8380 39.1 31.2 125 42.4 33.4 127 ----- ----- Basin wide percent of average 122 121 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.8 24.3 119 27.0 20.8 130 BLACK BEAR 8170 49.8 40.4 123 45.4 41.8 109 CANYON 7870 18.4 14.0 131 19.7 16.0 123 FISHER CREEK 9100 44.7 36.1 124 41.6 37.7 110 MADISON PLATEAU 7750 31.2 25.9 120 33.0 27.8 119 NORTHEAST ENTRANCE 7350 15.5 11.2 138 16.9 13.1 129 PARKER PEAK 9400 31.3 22.4 140 27.3 16.9 162 SYLVAN LAKE 8420 26.3 23.3 113 29.9 21.7 138 THUMB DIVIDE 7980 23.2 19.3 120 21.0 19.6 107 TWO OCEAN PLATEAU 9240 -M 29.2 * -M 28.7 * WHISKEY CREEK 6800 21.3 17.7 120 24.6 21.7 113 WHITE MILL 8700 31.0 25.1 124 31.0 28.0 111 WOLVERINE 7650 15.8 11.7 135 15.3 13.2 116 ----- ----- Basin wide percent of average 124 120 WIND RIVER BURROUGHS CREEK 8750 17.3 14.9 116 18.1 16.9 107 CASTLE CREEK 8400 7.3 -M * 8.7 -M * COLD SPRINGS 9630 8.2 8.7 94 8.6 11.2 77 DEER PARK 9700 19.3 17.3 112 22.7 22.9 99 HOBBS PARK 10100 15.6 15.8 99 13.7 13.5 101 LITTLE WARM 9370 13.0 12.3 106 13.4 13.9 96 SOUTH PASS 9040 17.6 17.2 102 15.5 19.2 81 ST. LAWRENCE ALT 8620 4.3 7.5 57 7.5 9.3 81 TOGWOTEE PASS 9580 30.7 25.8 119 32.3 25.6 126 TOWNSEND CREEK 8700 9.1 9.5 96 11.7 12.2 96 ----- ----- Basin wide percent of average 105 99 BIGHORN BASIN BALD MTN. 9380 24.5 20.5 120 19.5 18.1 108 BEAR TRAP MEADOW 8200 8.8 5.1 173 8.6 8.7 99 BLACKWATER 9780 28.8 25.5 113 27.4 21.4 128 BONE SPRINGS DIV 9350 21.0 16.9 124 17.3 15.2 114 EVENING STAR 9200 35.2 30.8 114 37.4 26.2 143 GRAVE SPRINGS 8550 9.0 9.9 91 9.2 10.2 90 KIRWIN 9550 12.8 11.8 108 13.8 11.7 118 MARQUETTE 8760 3.5 -M * 6.5 10.3 63 MIDDLE POWDER 7760 10.4 12.5 83 11.4 12.9 88 OWL CREEK 8975 5.6 5.7 98 6.0 6.2 97 POWDER RIVER PASS 9480 15.9 11.3 141 18.3 12.9 142 SHELL CREEK 9580 18.6 15.3 122 16.8 13.9 121 SYLVAN LAKE 8420 26.3 23.3 113 29.9 21.7 138 SYLVAN ROAD 7120 17.0 12.8 133 22.3 18.2 123 TIMBER CREEK 7950 4.2 5.9 71 5.3 7.8 68 YOUNTS PEAK 8350 19.2 17.6 109 16.6 16.7 99 ----- ----- Basin wide percent of average 114 115 SHOSHONE RIVER BLACKWATER 9780 28.8 25.5 113 27.4 21.4 128 EVENING STAR 9200 35.2 30.8 114 37.4 26.2 143 KIRWIN 9550 12.8 11.8 108 13.8 11.7 118 MARQUETTE 8760 3.5 -M * 6.5 10.3 63 SYLVAN LAKE 8420 26.3 23.3 113 29.9 21.7 138 SYLVAN ROAD 7120 17.0 12.8 133 22.3 18.2 123 YOUNTS PEAK 8350 19.2 17.6 109 16.6 16.7 99 ----- ----- Basin wide percent of average 114 122 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.8 5.1 173 8.6 8.7 99 BIG GOOSE 7990 9.1 11.4 80 10.9 9.2 118 BONE SPRINGS DIV 9350 21.0 16.9 124 17.3 15.2 114 BURGESS JUNCTION 7880 11.5 12.3 93 12.3 12.7 97 CLOUD PEAK RESERVOIR 9860 17.1 14.1 121 15.7 13.5 116 DOME LAKE 8880 14.7 13.1 112 13.9 13.7 101 GRAVE SPRINGS 8550 9.0 9.9 91 9.2 10.2 90 HANSEN SAWMILL 8360 7.2 6.5 111 8.3 8.6 97 LITTLE GOOSE 8870 10.4 -M * 14.8 -M * MIDDLE POWDER 7760 10.4 12.5 83 11.4 12.9 88 POWDER RIVER PASS 9480 15.9 11.3 141 18.3 12.9 142 SOLDIER PARK 8720 8.7 -M * 9.8 -M * SUCKER CREEK 8880 14.1 12.5 113 15.7 14.2 111 TIE CREEK 6870 6.8 6.3 108 10.9 10.4 105 ----- ----- Basin wide percent of average 110 107 BELLE FOURCHE BLIND PARK 6890 10.2 8.2 124 17.4 11.5 151 COLE CANYON 5910 7.9 7.1 111 12.7 7.0 181 NORTH RAPID CREEK 6130 8.5 8.7 98 14.6 8.9 164 ----- ----- Basin wide percent of average 111 163 UPPER N. PLATTE RIVER CINNABAR PARK 9574 26.0 18.0 144 34.1 20.7 165 COLUMBINE 9160 36.1 25.1 144 36.9 26.0 142 DIVIDE PEAK 8880 24.2 20.4 119 29.3 21.4 137 ELK RIVER 8700 26.3 20.0 132 27.9 20.2 138 JOE WRIGHT 10120 34.4 22.3 154 37.3 25.7 145 NORTH FRENCH CREEK 10130 48.6 30.7 158 -M 25.5 * OLD BATTLE 10000 44.9 33.3 135 46.3 35.6 130 SAGE CREEK BASIN 7850 21.4 11.8 181 19.8 12.4 160 SOUTH BRUSH CREEK 8440 19.9 13.4 149 23.4 17.0 138 TOWER 10500 58.3 47.2 124 47.1 39.6 119 WEBBER SPRINGS 9250 32.2 26.4 122 37.7 27.6 137 WILLOW CREEK PASS 9540 20.8 12.7 164 18.9 13.3 142 ----- ----- Basin wide percent of average 140 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 33.2 24.8 134 32.3 22.9 141 CASPER MTN. 7900 11.5 15.4 75 15.0 15.2 99 DEADMAN HILL 10220 21.4 17.1 125 23.1 17.6 131 DEER PARK 9700 19.3 17.3 112 22.7 22.9 99 LAPRELE CREEK 8375 13.7 11.0 125 15.2 13.1 116 RENO HILL 8400 15.5 15.0 103 18.3 15.8 116 ROACH 9700 21.4 17.8 120 24.7 19.3 128 SAND LAKE 10050 39.7 33.6 118 -M 25.0 * SOUTH PASS 9040 17.6 17.2 102 15.5 19.2 81 WINDY PEAK 7900 10.5 8.4 125 13.9 11.0 126 ----- ----- Basin wide percent of average 115 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 10.3 * 15.8 16.4 96 DIVIDE PEAK 8880 24.2 20.4 119 29.3 21.4 137 OLD BATTLE 10000 44.9 33.3 135 46.3 35.6 130 SANDSTONE RS 8150 18.7 14.4 130 26.9 19.3 139 WHISKEY PARK 8950 -M 30.7 * 42.8 29.6 145 ----- ----- Basin wide percent of average 129 132 UPPER GREEN RIVER BIG SANDY OPENING 9080 16.2 15.0 108 16.3 13.8 118 BLIND BULL SUM 8650 35.6 28.7 124 24.3 23.0 106 EAST RIM DIVIDE 7930 15.8 13.6 116 13.9 12.5 111 ELKHART PARK G.S. 9400 14.2 13.8 103 14.0 13.8 101 GROS VENTRE SUMMIT 8750 15.1 14.6 103 15.1 13.4 113 GUNSIGHT PASS 9820 19.0 -M * 18.0 -M * KENDALL R.S. 7740 14.1 14.4 98 16.2 15.0 108 LOOMIS PARK 8240 21.7 17.5 124 21.9 18.0 122 NEW FORK LAKE 8340 13.4 11.5 117 12.1 11.7 103 POCKET CREEK 9360 13.0 -M * 15.0 -M * SNIDER BASIN 8060 21.4 14.9 144 20.1 16.7 120 SPRING CREEK DIVIDE 9000 37.3 27.6 135 34.1 27.4 124 TRIPLE PEAK 8500 36.0 25.6 141 36.0 25.7 140 ----- ----- Basin wide percent of average 122 117 LOWER GREEN RIVER HAMS FORK 7840 16.9 11.4 148 16.0 12.7 126 HEWINTA 9519 12.2 12.5 98 18.3 15.2 120 HICKERSON PARK 9145 6.9 8.1 85 10.5 8.3 127 HOLE-IN-ROCK 9150 8.0 7.4 108 11.6 7.8 149 INDIAN CREEK 9425 33.2 28.9 115 28.6 26.4 108 KELLEY R.S. 8180 22.0 17.4 126 24.8 21.1 118 STEEL CREEK PARK 10200 18.4 16.4 112 21.1 17.0 124 ----- ----- Basin wide percent of average 115 121 UPPER BEAR RIVER BUG LAKE 7950 31.6 21.6 146 30.4 19.9 153 HAYDEN FORK 9212 24.3 16.9 144 30.8 21.8 141 KELLEY R.S. 8180 22.0 17.4 126 24.8 21.1 118 LILY LAKE 9156 23.0 14.3 161 23.3 18.2 128 MONTE CRISTO 8960 40.3 30.4 133 37.7 26.5 142 SALT RIVER SUMMIT 7760 18.0 14.9 121 22.7 19.5 116 TRIAL LAKE 9992 38.3 25.8 148 35.2 25.9 136 ----- ----- Basin wide percent of average 140 134 ----------------------------------------------------------------------------- -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.