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: APRIL 7 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 24.4 17.9 136 26.2 22.2 118 COTTONWOOD CREEK 7670 30.4 24.4 125 37.2 28.6 130 GRAND TARGHEE 9260 51.1 -M * 38.8 -M * GRANITE CREEK 6770 23.3 18.2 128 25.4 20.5 124 GRASSY LAKE 7265 42.6 36.9 115 44.1 37.3 118 GROS VENTRE SUMMIT 8750 15.2 14.6 104 15.2 13.5 113 GUNSIGHT PASS 9820 19.1 -M * 18.2 -M * LEWIS LAKE DIVIDE 7850 44.8 36.5 123 -M 38.1 * PHILLIPS BENCH 8200 35.7 30.0 119 35.4 30.2 117 SALT RIVER SUMMIT 7760 18.2 14.9 122 22.9 19.6 117 SNAKE RIVER STATION 6920 -M 18.9 * 28.5 23.1 123 SPRING CREEK DIVIDE 9000 37.6 27.7 136 34.5 27.5 125 THUMB DIVIDE 7980 24.2 19.3 125 21.8 19.7 111 TOGWOTEE PASS 9580 31.0 25.9 120 32.5 25.7 126 TWO OCEAN PLATEAU 9240 -M 29.4 * -M 28.8 * WILLOW CREEK 8380 39.3 31.3 126 42.6 33.5 127 ----- ----- Basin wide percent of average 123 122 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 29.6 24.4 121 27.4 20.9 131 BLACK BEAR 8170 51.0 40.5 126 46.5 42.0 111 CANYON 7870 19.0 14.0 136 20.3 16.0 127 FISHER CREEK 9100 45.2 36.3 125 43.0 37.8 114 MADISON PLATEAU 7750 32.1 26.0 123 33.7 27.9 121 NORTHEAST ENTRANCE 7350 15.8 11.2 141 17.2 13.2 130 PARKER PEAK 9400 31.9 22.5 142 27.8 17.0 164 SYLVAN LAKE 8420 27.1 23.3 116 30.6 21.8 140 THUMB DIVIDE 7980 24.2 19.3 125 21.8 19.7 111 TWO OCEAN PLATEAU 9240 -M 29.4 * -M 28.8 * WHISKEY CREEK 6800 21.7 17.7 123 24.8 21.9 113 WHITE MILL 8700 31.5 25.2 125 31.4 28.1 112 WOLVERINE 7650 16.2 11.7 138 15.7 13.3 118 ----- ----- Basin wide percent of average 127 122 WIND RIVER BURROUGHS CREEK 8750 17.5 15.0 117 18.2 17.0 107 CASTLE CREEK 8400 7.3 -M * 8.7 -M * COLD SPRINGS 9630 8.2 8.5 96 8.7 11.3 77 DEER PARK 9700 19.3 17.3 112 22.7 23.0 99 HOBBS PARK 10100 15.7 15.8 99 13.8 13.6 101 LITTLE WARM 9370 13.2 12.3 107 13.5 14.0 96 SOUTH PASS 9040 17.6 17.3 102 15.4 19.3 80 ST. LAWRENCE ALT 8620 4.2 7.5 56 7.5 9.4 80 TOGWOTEE PASS 9580 31.0 25.9 120 32.5 25.7 126 TOWNSEND CREEK 8700 9.1 9.5 96 11.7 12.4 94 ----- ----- Basin wide percent of average 105 99 BIGHORN BASIN BALD MTN. 9380 24.5 20.7 118 19.6 18.2 108 BEAR TRAP MEADOW 8200 8.8 5.2 169 8.6 8.8 98 BLACKWATER 9780 29.3 25.6 114 27.9 21.5 130 BONE SPRINGS DIV 9350 21.0 16.9 124 17.3 15.4 112 EVENING STAR 9200 36.0 30.9 117 38.2 26.4 145 GRAVE SPRINGS 8550 9.1 10.0 91 9.3 10.3 90 KIRWIN 9550 13.1 11.9 110 14.1 11.8 119 MARQUETTE 8760 3.6 -M * 6.6 10.5 63 MIDDLE POWDER 7760 10.4 12.7 82 11.4 13.0 88 OWL CREEK 8975 5.6 5.7 98 6.0 6.3 95 POWDER RIVER PASS 9480 15.9 11.4 139 18.4 13.0 142 SHELL CREEK 9580 18.6 15.3 122 16.9 14.0 121 SYLVAN LAKE 8420 27.1 23.3 116 30.6 21.8 140 SYLVAN ROAD 7120 17.4 12.7 137 22.8 18.3 125 TIMBER CREEK 7950 4.1 5.9 69 5.3 7.8 68 YOUNTS PEAK 8350 19.5 17.7 110 16.8 16.8 100 ----- ----- Basin wide percent of average 115 115 SHOSHONE RIVER BLACKWATER 9780 29.3 25.6 114 27.9 21.5 130 EVENING STAR 9200 36.0 30.9 117 38.2 26.4 145 KIRWIN 9550 13.1 11.9 110 14.1 11.8 119 MARQUETTE 8760 3.6 -M * 6.6 10.5 63 SYLVAN LAKE 8420 27.1 23.3 116 30.6 21.8 140 SYLVAN ROAD 7120 17.4 12.7 137 22.8 18.3 125 YOUNTS PEAK 8350 19.5 17.7 110 16.8 16.8 100 ----- ----- Basin wide percent of average 117 124 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.8 5.2 169 8.6 8.8 98 BIG GOOSE 7990 9.2 11.5 80 10.9 9.3 117 BONE SPRINGS DIV 9350 21.0 16.9 124 17.3 15.4 112 BURGESS JUNCTION 7880 11.5 12.4 93 12.3 12.8 96 CLOUD PEAK RESERVOIR 9860 17.2 14.2 121 15.8 13.6 116 DOME LAKE 8880 14.7 13.1 112 14.0 13.9 101 GRAVE SPRINGS 8550 9.1 10.0 91 9.3 10.3 90 HANSEN SAWMILL 8360 7.2 6.5 111 8.3 8.7 95 LITTLE GOOSE 8870 10.4 -M * 14.9 -M * MIDDLE POWDER 7760 10.4 12.7 82 11.4 13.0 88 POWDER RIVER PASS 9480 15.9 11.4 139 18.4 13.0 142 SOLDIER PARK 8720 8.7 -M * 9.8 -M * SUCKER CREEK 8880 14.2 12.5 114 15.7 14.3 110 TIE CREEK 6870 6.8 6.2 110 11.0 10.5 105 ----- ----- Basin wide percent of average 110 107 BELLE FOURCHE BLIND PARK 6890 10.2 8.2 124 17.4 11.6 150 COLE CANYON 5910 7.9 7.1 111 12.7 7.0 181 NORTH RAPID CREEK 6130 8.6 8.7 99 14.8 8.9 166 ----- ----- Basin wide percent of average 111 163 UPPER N. PLATTE RIVER CINNABAR PARK 9574 26.2 18.0 146 34.2 20.8 164 COLUMBINE 9160 35.6 25.1 142 36.9 26.2 141 DIVIDE PEAK 8880 24.8 20.5 121 29.6 21.5 138 ELK RIVER 8700 26.6 20.1 132 28.2 20.4 138 JOE WRIGHT 10120 35.0 22.4 156 37.9 25.8 147 NORTH FRENCH CREEK 10130 49.0 30.9 159 -M 25.6 * OLD BATTLE 10000 45.5 33.4 136 46.3 35.8 129 SAGE CREEK BASIN 7850 21.6 11.9 182 20.0 12.5 160 SOUTH BRUSH CREEK 8440 20.4 13.4 152 23.8 17.2 138 TOWER 10500 58.8 47.5 124 47.1 39.9 118 WEBBER SPRINGS 9250 32.5 26.4 123 37.8 27.8 136 WILLOW CREEK PASS 9540 21.2 12.8 166 19.2 13.4 143 ----- ----- Basin wide percent of average 141 138 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 33.4 25.0 134 32.3 23.1 140 CASPER MTN. 7900 11.5 15.5 74 15.0 15.3 98 DEADMAN HILL 10220 21.8 17.3 126 23.4 17.7 132 DEER PARK 9700 19.3 17.3 112 22.7 23.0 99 LAPRELE CREEK 8375 14.0 10.9 128 15.5 13.3 117 RENO HILL 8400 15.8 15.1 105 18.5 15.9 116 ROACH 9700 21.8 17.9 122 24.8 19.4 128 SAND LAKE 10050 40.2 33.8 119 -M 25.2 * SOUTH PASS 9040 17.6 17.3 102 15.4 19.3 80 WINDY PEAK 7900 10.9 8.4 130 14.3 11.1 129 ----- ----- Basin wide percent of average 116 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 10.2 * 16.0 16.5 97 DIVIDE PEAK 8880 24.8 20.5 121 29.6 21.5 138 OLD BATTLE 10000 45.5 33.4 136 46.3 35.8 129 SANDSTONE RS 8150 19.0 14.4 132 27.2 19.4 140 WHISKEY PARK 8950 -M 30.7 * -M 29.8 * ----- ----- Basin wide percent of average 131 128 UPPER GREEN RIVER BIG SANDY OPENING 9080 16.3 15.1 108 16.4 13.9 118 BLIND BULL SUM 8650 36.1 28.8 125 24.5 23.1 106 EAST RIM DIVIDE 7930 15.9 13.6 117 14.0 12.5 112 ELKHART PARK G.S. 9400 14.3 13.9 103 14.0 13.9 101 GROS VENTRE SUMMIT 8750 15.2 14.6 104 15.2 13.5 113 GUNSIGHT PASS 9820 19.1 -M * 18.2 -M * KENDALL R.S. 7740 14.1 14.3 99 16.3 15.1 108 LOOMIS PARK 8240 21.8 17.5 125 22.1 18.1 122 NEW FORK LAKE 8340 13.3 11.5 116 12.2 11.8 103 POCKET CREEK 9360 13.0 -M * 15.0 -M * SNIDER BASIN 8060 21.6 15.0 144 20.3 16.8 121 SPRING CREEK DIVIDE 9000 37.6 27.7 136 34.5 27.5 125 TRIPLE PEAK 8500 36.2 25.7 141 36.4 25.8 141 ----- ----- Basin wide percent of average 123 118 LOWER GREEN RIVER HAMS FORK 7840 17.0 11.3 150 16.1 12.7 127 HEWINTA 9519 12.3 12.5 98 18.3 15.3 120 HICKERSON PARK 9145 6.8 8.2 83 10.4 8.4 124 HOLE-IN-ROCK 9150 7.9 7.4 107 11.6 7.9 147 INDIAN CREEK 9425 33.7 29.0 116 28.8 26.5 109 KELLEY R.S. 8180 22.3 17.4 128 25.0 21.2 118 STEEL CREEK PARK 10200 18.6 16.5 113 21.1 17.2 123 ----- ----- Basin wide percent of average 116 120 UPPER BEAR RIVER BUG LAKE 7950 31.7 21.7 146 30.7 20.0 154 HAYDEN FORK 9212 24.6 16.9 146 30.8 22.0 140 KELLEY R.S. 8180 22.3 17.4 128 25.0 21.2 118 LILY LAKE 9156 22.8 14.4 158 23.3 18.4 127 MONTE CRISTO 8960 40.5 30.5 133 38.7 26.6 145 SALT RIVER SUMMIT 7760 18.2 14.9 122 22.9 19.6 117 TRIAL LAKE 9992 38.3 25.9 148 35.3 26.0 136 ----- ----- 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.