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 SATURDAY: APRIL 2 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 21.9 18.1 121 24.3 21.8 111 COTTONWOOD CREEK 7670 27.8 24.2 115 35.9 27.9 129 GRAND TARGHEE 9260 49.1 -M * -M -M * GRANITE CREEK 6770 22.7 18.6 122 24.4 20.2 121 GRASSY LAKE 7265 40.2 36.3 111 41.7 36.6 114 GROS VENTRE SUMMIT 8750 14.8 14.4 103 14.5 13.1 111 GUNSIGHT PASS 9820 18.5 -M * 17.6 -M * LEWIS LAKE DIVIDE 7850 41.8 36.0 116 -M 37.3 * PHILLIPS BENCH 8200 33.5 29.4 114 33.5 29.5 114 SALT RIVER SUMMIT 7760 17.4 14.7 118 22.2 19.1 116 SNAKE RIVER STATION 6920 -M 19.2 * 26.8 22.6 119 SPRING CREEK DIVIDE 9000 36.5 27.1 135 33.5 26.9 125 THUMB DIVIDE 7980 22.8 19.3 118 -M 19.2 * TOGWOTEE PASS 9580 29.5 25.3 117 31.0 25.0 124 TWO OCEAN PLATEAU 9240 -M 28.6 * -M 28.1 * WILLOW CREEK 8380 38.1 30.8 124 41.3 32.7 126 ----- ----- Basin wide percent of average 118 119 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.5 23.7 116 26.0 20.4 127 BLACK BEAR 8170 48.5 39.8 122 -M 41.1 * CANYON 7870 17.4 13.9 125 18.8 15.7 120 FISHER CREEK 9100 42.9 35.5 121 40.8 37.0 110 MADISON PLATEAU 7750 30.5 25.5 120 32.2 27.2 118 NORTHEAST ENTRANCE 7350 14.7 11.3 130 16.3 12.9 126 PARKER PEAK 9400 29.9 22.0 136 -M 16.5 * SYLVAN LAKE 8420 25.3 22.9 110 28.8 21.2 136 THUMB DIVIDE 7980 22.8 19.3 118 -M 19.2 * TWO OCEAN PLATEAU 9240 -M 28.6 * -M 28.1 * WHISKEY CREEK 6800 21.4 17.5 122 24.1 21.3 113 WHITE MILL 8700 29.6 24.7 120 29.8 27.4 109 WOLVERINE 7650 15.2 11.7 130 15.1 13.0 116 ----- ----- Basin wide percent of average 122 118 WIND RIVER BURROUGHS CREEK 8750 15.8 14.8 107 16.7 16.5 101 CASTLE CREEK 8400 6.7 -M * 8.0 -M * COLD SPRINGS 9630 8.0 9.0 89 8.4 10.8 78 DEER PARK 9700 18.9 17.3 109 22.2 22.2 100 HOBBS PARK 10100 14.6 15.3 95 12.9 13.0 99 LITTLE WARM 9370 12.6 12.1 104 13.0 13.6 96 SOUTH PASS 9040 17.4 16.9 103 15.1 18.7 81 ST. LAWRENCE ALT 8620 4.5 7.4 61 7.0 9.0 78 TOGWOTEE PASS 9580 29.5 25.3 117 31.0 25.0 124 TOWNSEND CREEK 8700 8.8 9.0 98 11.2 11.8 95 ----- ----- Basin wide percent of average 102 98 BIGHORN BASIN BALD MTN. 9380 24.1 20.0 121 19.3 17.6 110 BEAR TRAP MEADOW 8200 8.8 5.2 169 8.2 8.4 98 BLACKWATER 9780 26.8 24.9 108 25.9 20.8 125 BONE SPRINGS DIV 9350 20.4 16.5 124 16.8 14.8 114 EVENING STAR 9200 33.5 30.2 111 -M 25.7 * GRAVE SPRINGS 8550 9.2 9.5 97 9.1 9.8 93 KIRWIN 9550 11.7 11.5 102 13.1 11.4 115 MARQUETTE 8760 3.1 -M * 6.4 9.9 65 MIDDLE POWDER 7760 10.6 11.9 89 11.4 12.5 91 OWL CREEK 8975 5.6 5.6 100 6.0 6.0 100 POWDER RIVER PASS 9480 15.6 11.0 142 17.9 12.5 143 SHELL CREEK 9580 18.3 14.9 123 16.6 13.5 123 SYLVAN LAKE 8420 25.3 22.9 110 28.8 21.2 136 SYLVAN ROAD 7120 16.1 12.9 125 21.1 17.9 118 TIMBER CREEK 7950 4.2 5.8 72 5.1 7.5 68 YOUNTS PEAK 8350 18.3 17.4 105 15.8 16.4 96 ----- ----- Basin wide percent of average 113 111 SHOSHONE RIVER BLACKWATER 9780 26.8 24.9 108 25.9 20.8 125 EVENING STAR 9200 33.5 30.2 111 -M 25.7 * KIRWIN 9550 11.7 11.5 102 13.1 11.4 115 MARQUETTE 8760 3.1 -M * 6.4 9.9 65 SYLVAN LAKE 8420 25.3 22.9 110 28.8 21.2 136 SYLVAN ROAD 7120 16.1 12.9 125 21.1 17.9 118 YOUNTS PEAK 8350 18.3 17.4 105 15.8 16.4 96 ----- ----- Basin wide percent of average 110 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.8 5.2 169 8.2 8.4 98 BIG GOOSE 7990 8.7 10.8 81 10.4 8.6 121 BONE SPRINGS DIV 9350 20.4 16.5 124 16.8 14.8 114 BURGESS JUNCTION 7880 11.1 11.8 94 11.9 12.3 97 CLOUD PEAK RESERVOIR 9860 16.1 13.6 118 14.8 13.0 114 DOME LAKE 8880 14.3 12.7 113 13.6 13.3 102 GRAVE SPRINGS 8550 9.2 9.5 97 9.1 9.8 93 HANSEN SAWMILL 8360 7.2 6.5 111 7.9 8.3 95 LITTLE GOOSE 8870 9.8 -M * 14.2 -M * MIDDLE POWDER 7760 10.6 11.9 89 11.4 12.5 91 POWDER RIVER PASS 9480 15.6 11.0 142 17.9 12.5 143 SOLDIER PARK 8720 8.2 -M * 9.2 -M * SUCKER CREEK 8880 13.7 11.9 115 15.0 13.7 109 TIE CREEK 6870 6.8 6.1 111 10.5 10.0 105 ----- ----- Basin wide percent of average 112 108 BELLE FOURCHE BLIND PARK 6890 10.4 8.6 121 17.1 11.2 153 COLE CANYON 5910 8.4 6.9 122 12.4 6.7 185 NORTH RAPID CREEK 6130 8.8 8.4 105 14.3 8.6 166 ----- ----- Basin wide percent of average 115 165 UPPER N. PLATTE RIVER CINNABAR PARK 9574 25.5 17.9 142 33.1 20.2 164 COLUMBINE 9160 36.2 25.1 144 36.0 25.5 141 DIVIDE PEAK 8880 24.0 20.1 119 28.1 20.9 134 ELK RIVER 8700 26.7 19.7 136 27.2 19.8 137 JOE WRIGHT 10120 33.2 21.6 154 36.2 25.0 145 NORTH FRENCH CREEK 10130 46.6 29.8 156 -M 24.9 * OLD BATTLE 10000 43.9 32.6 135 29.6 34.9 85 SAGE CREEK BASIN 7850 21.5 11.7 184 19.0 12.1 157 SOUTH BRUSH CREEK 8440 19.1 13.2 145 22.2 16.6 134 TOWER 10500 57.2 46.1 124 46.4 38.8 120 WEBBER SPRINGS 9250 31.9 26.4 121 36.7 27.0 136 WILLOW CREEK PASS 9540 19.6 12.2 161 17.9 13.0 138 ----- ----- Basin wide percent of average 139 131 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 32.7 24.1 136 31.4 22.3 141 CASPER MTN. 7900 10.9 14.7 74 13.8 14.6 95 DEADMAN HILL 10220 22.1 16.6 133 22.2 17.1 130 DEER PARK 9700 18.9 17.3 109 22.2 22.2 100 LAPRELE CREEK 8375 13.1 11.0 119 14.2 12.7 112 RENO HILL 8400 14.2 14.4 99 16.9 15.1 112 ROACH 9700 21.3 17.3 123 24.3 18.8 129 SAND LAKE 10050 38.1 32.9 116 -M 24.4 * SOUTH PASS 9040 17.4 16.9 103 15.1 18.7 81 WINDY PEAK 7900 10.5 8.2 128 13.2 10.6 125 ----- ----- Basin wide percent of average 115 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 10.9 * 14.9 16.0 93 DIVIDE PEAK 8880 24.0 20.1 119 28.1 20.9 134 OLD BATTLE 10000 43.9 32.6 135 29.6 34.9 85 SANDSTONE RS 8150 18.1 14.7 123 26.2 18.9 139 WHISKEY PARK 8950 -M 30.5 * 42.0 29.0 145 ----- ----- Basin wide percent of average 128 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 15.4 14.7 105 15.6 13.5 116 BLIND BULL SUM 8650 33.9 28.4 119 23.6 22.6 104 EAST RIM DIVIDE 7930 15.8 13.4 118 13.6 12.2 111 ELKHART PARK G.S. 9400 14.2 13.6 104 13.9 13.5 103 GROS VENTRE SUMMIT 8750 14.8 14.4 103 14.5 13.1 111 GUNSIGHT PASS 9820 18.5 -M * 17.6 -M * KENDALL R.S. 7740 13.5 14.5 93 15.6 14.8 105 LOOMIS PARK 8240 21.6 17.5 123 21.4 17.7 121 NEW FORK LAKE 8340 13.1 11.4 115 12.1 11.5 105 POCKET CREEK 9360 12.2 -M * 14.6 -M * SNIDER BASIN 8060 21.3 14.8 144 19.8 16.4 121 SPRING CREEK DIVIDE 9000 36.5 27.1 135 33.5 26.9 125 TRIPLE PEAK 8500 34.8 25.3 138 34.9 25.2 138 ----- ----- Basin wide percent of average 120 117 LOWER GREEN RIVER HAMS FORK 7840 16.8 11.9 141 15.6 12.4 126 HEWINTA 9519 12.9 12.2 106 17.2 14.8 116 HICKERSON PARK 9145 7.5 7.8 96 10.1 8.0 126 HOLE-IN-ROCK 9150 8.6 7.2 119 10.8 7.6 142 INDIAN CREEK 9425 32.2 28.4 113 28.0 25.9 108 KELLEY R.S. 8180 21.5 17.2 125 24.3 20.7 117 STEEL CREEK PARK 10200 17.4 16.0 109 19.9 16.5 121 ----- ----- Basin wide percent of average 116 119 UPPER BEAR RIVER BUG LAKE 7950 30.4 21.3 143 29.7 19.5 152 HAYDEN FORK 9212 23.8 16.7 143 29.2 21.3 137 KELLEY R.S. 8180 21.5 17.2 125 24.3 20.7 117 LILY LAKE 9156 22.0 13.7 161 21.6 17.7 122 MONTE CRISTO 8960 39.4 30.2 130 37.6 25.9 145 SALT RIVER SUMMIT 7760 17.4 14.7 118 22.2 19.1 116 TRIAL LAKE 9992 36.4 25.4 143 34.2 25.3 135 ----- ----- Basin wide percent of average 137 133 ----------------------------------------------------------------------------- -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.