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 FRIDAY: APRIL 1 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 22.2 18.1 123 24.2 21.7 112 COTTONWOOD CREEK 7670 28.7 24.2 119 35.8 27.8 129 GRAND TARGHEE 9260 48.8 -M * -M -M * GRANITE CREEK 6770 22.9 18.6 123 24.3 20.1 121 GRASSY LAKE 7265 40.6 36.1 112 41.6 36.4 114 GROS VENTRE SUMMIT 8750 14.9 14.4 103 14.5 13.0 112 GUNSIGHT PASS 9820 18.4 -M * 17.6 -M * LEWIS LAKE DIVIDE 7850 41.8 35.8 117 -M 37.2 * PHILLIPS BENCH 8200 33.6 29.2 115 33.3 29.4 113 SALT RIVER SUMMIT 7760 17.7 14.6 121 22.3 19.0 117 SNAKE RIVER STATION 6920 -M 19.2 * 26.8 22.5 119 SPRING CREEK DIVIDE 9000 36.5 26.9 136 33.4 26.8 125 THUMB DIVIDE 7980 22.6 19.2 118 20.5 19.1 107 TOGWOTEE PASS 9580 29.5 25.2 117 31.0 24.9 124 TWO OCEAN PLATEAU 9240 -M 28.4 * -M 28.0 * WILLOW CREEK 8380 37.4 30.6 122 41.3 32.6 127 ----- ----- Basin wide percent of average 119 119 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.2 23.6 115 25.9 20.3 128 BLACK BEAR 8170 48.5 39.8 122 44.4 40.9 109 CANYON 7870 17.5 13.9 126 18.8 15.6 121 FISHER CREEK 9100 42.9 35.4 121 40.7 36.8 111 MADISON PLATEAU 7750 30.6 25.5 120 32.2 27.1 119 NORTHEAST ENTRANCE 7350 15.0 11.3 133 16.2 12.8 127 PARKER PEAK 9400 29.8 21.9 136 25.9 16.4 158 SYLVAN LAKE 8420 25.2 22.8 111 28.7 21.1 136 THUMB DIVIDE 7980 22.6 19.2 118 20.5 19.1 107 TWO OCEAN PLATEAU 9240 -M 28.4 * -M 28.0 * WHISKEY CREEK 6800 21.4 17.4 123 24.1 21.2 114 WHITE MILL 8700 29.5 24.6 120 29.6 27.3 108 WOLVERINE 7650 15.4 11.6 133 15.0 12.9 116 ----- ----- Basin wide percent of average 122 119 WIND RIVER BURROUGHS CREEK 8750 15.8 14.8 107 16.5 16.4 101 CASTLE CREEK 8400 6.8 -M * 8.0 -M * COLD SPRINGS 9630 8.4 9.0 93 8.5 10.7 79 DEER PARK 9700 19.1 17.1 112 22.2 22.1 100 HOBBS PARK 10100 14.6 15.1 97 13.0 12.9 101 LITTLE WARM 9370 12.7 12.0 106 12.9 13.5 96 SOUTH PASS 9040 17.5 16.7 105 15.2 18.6 82 ST. LAWRENCE ALT 8620 4.9 7.4 66 7.0 8.9 79 TOGWOTEE PASS 9580 29.5 25.2 117 31.0 24.9 124 TOWNSEND CREEK 8700 8.8 8.8 100 11.2 11.7 96 ----- ----- Basin wide percent of average 104 98 BIGHORN BASIN BALD MTN. 9380 24.0 19.9 121 19.3 17.5 110 BEAR TRAP MEADOW 8200 8.8 5.2 169 8.2 8.3 99 BLACKWATER 9780 26.9 24.8 108 25.8 20.7 125 BONE SPRINGS DIV 9350 20.3 16.4 124 16.8 14.7 114 EVENING STAR 9200 33.2 30.1 110 35.3 25.5 138 GRAVE SPRINGS 8550 9.2 9.4 98 9.2 9.7 95 KIRWIN 9550 11.9 11.5 103 13.2 11.3 117 MARQUETTE 8760 3.1 -M * 6.4 9.8 65 MIDDLE POWDER 7760 10.9 11.8 92 11.5 12.4 93 OWL CREEK 8975 5.8 5.6 104 6.0 5.9 102 POWDER RIVER PASS 9480 15.0 10.9 138 17.4 12.4 140 SHELL CREEK 9580 18.2 14.9 122 16.4 13.4 122 SYLVAN LAKE 8420 25.2 22.8 111 28.7 21.1 136 SYLVAN ROAD 7120 16.4 12.9 127 21.1 17.8 119 TIMBER CREEK 7950 4.3 5.8 74 5.1 7.4 69 YOUNTS PEAK 8350 18.1 17.3 105 15.8 16.3 97 ----- ----- Basin wide percent of average 113 114 SHOSHONE RIVER BLACKWATER 9780 26.9 24.8 108 25.8 20.7 125 EVENING STAR 9200 33.2 30.1 110 35.3 25.5 138 KIRWIN 9550 11.9 11.5 103 13.2 11.3 117 MARQUETTE 8760 3.1 -M * 6.4 9.8 65 SYLVAN LAKE 8420 25.2 22.8 111 28.7 21.1 136 SYLVAN ROAD 7120 16.4 12.9 127 21.1 17.8 119 YOUNTS PEAK 8350 18.1 17.3 105 15.8 16.3 97 ----- ----- Basin wide percent of average 110 119 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.8 5.2 169 8.2 8.3 99 BIG GOOSE 7990 8.6 10.7 80 10.4 8.5 122 BONE SPRINGS DIV 9350 20.3 16.4 124 16.8 14.7 114 BURGESS JUNCTION 7880 10.9 11.7 93 11.9 12.2 98 CLOUD PEAK RESERVOIR 9860 16.0 13.5 119 14.7 12.9 114 DOME LAKE 8880 14.2 12.6 113 13.5 13.2 102 GRAVE SPRINGS 8550 9.2 9.4 98 9.2 9.7 95 HANSEN SAWMILL 8360 7.2 6.5 111 7.9 8.2 96 LITTLE GOOSE 8870 9.7 -M * 14.1 -M * MIDDLE POWDER 7760 10.9 11.8 92 11.5 12.4 93 POWDER RIVER PASS 9480 15.0 10.9 138 17.4 12.4 140 SOLDIER PARK 8720 8.2 -M * 9.2 -M * SUCKER CREEK 8880 13.6 11.8 115 14.9 13.6 110 TIE CREEK 6870 6.9 6.1 113 10.5 9.9 106 ----- ----- Basin wide percent of average 112 108 BELLE FOURCHE BLIND PARK 6890 10.3 8.7 118 17.0 11.1 153 COLE CANYON 5910 8.5 6.9 123 12.4 6.7 185 NORTH RAPID CREEK 6130 8.9 8.3 107 14.3 8.6 166 ----- ----- Basin wide percent of average 116 166 UPPER N. PLATTE RIVER CINNABAR PARK 9574 25.7 17.9 144 33.0 20.1 164 COLUMBINE 9160 35.6 25.0 142 36.1 25.3 143 DIVIDE PEAK 8880 24.8 20.0 124 28.1 20.8 135 ELK RIVER 8700 26.4 19.6 135 27.2 19.7 138 JOE WRIGHT 10120 33.1 21.5 154 35.1 24.9 141 NORTH FRENCH CREEK 10130 46.5 29.5 158 48.4 24.8 195 OLD BATTLE 10000 43.7 32.4 135 29.6 34.8 85 SAGE CREEK BASIN 7850 21.6 11.6 186 19.0 12.1 157 SOUTH BRUSH CREEK 8440 18.9 13.2 143 22.2 16.4 135 TOWER 10500 57.1 45.8 125 46.3 38.6 120 WEBBER SPRINGS 9250 31.9 26.4 121 36.7 26.8 137 WILLOW CREEK PASS 9540 19.6 12.1 162 17.9 12.9 139 ----- ----- Basin wide percent of average 140 137 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 32.7 23.9 137 31.1 22.1 141 CASPER MTN. 7900 10.9 14.6 75 13.8 14.4 96 DEADMAN HILL 10220 22.1 16.4 135 22.3 17.0 131 DEER PARK 9700 19.1 17.1 112 22.2 22.1 100 LAPRELE CREEK 8375 13.1 11.0 119 14.2 12.6 113 RENO HILL 8400 14.2 14.3 99 16.9 15.0 113 ROACH 9700 21.2 17.2 123 24.3 18.7 130 SAND LAKE 10050 38.1 32.7 117 36.0 24.2 149 SOUTH PASS 9040 17.5 16.7 105 15.2 18.6 82 WINDY PEAK 7900 10.6 8.1 131 13.2 10.6 125 ----- ----- Basin wide percent of average 116 119 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.5 11.0 105 15.0 15.9 94 DIVIDE PEAK 8880 24.8 20.0 124 28.1 20.8 135 OLD BATTLE 10000 43.7 32.4 135 29.6 34.8 85 SANDSTONE RS 8150 18.3 14.8 124 26.2 18.8 139 WHISKEY PARK 8950 37.5 30.4 123 42.0 28.8 146 ----- ----- Basin wide percent of average 125 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 15.6 14.7 106 15.7 13.5 116 BLIND BULL SUM 8650 33.7 28.3 119 23.6 22.5 105 EAST RIM DIVIDE 7930 16.2 13.3 122 13.6 12.2 111 ELKHART PARK G.S. 9400 14.3 13.6 105 13.9 13.5 103 GROS VENTRE SUMMIT 8750 14.9 14.4 103 14.5 13.0 112 GUNSIGHT PASS 9820 18.4 -M * 17.6 -M * KENDALL R.S. 7740 14.1 14.6 97 15.7 14.7 107 LOOMIS PARK 8240 22.0 17.5 126 21.4 17.6 122 NEW FORK LAKE 8340 13.2 11.3 117 12.1 11.4 106 POCKET CREEK 9360 12.7 -M * 14.7 -M * SNIDER BASIN 8060 21.4 14.7 146 19.9 16.3 122 SPRING CREEK DIVIDE 9000 36.5 26.9 136 33.4 26.8 125 TRIPLE PEAK 8500 34.2 25.2 136 34.8 25.1 139 ----- ----- Basin wide percent of average 121 117 LOWER GREEN RIVER HAMS FORK 7840 17.4 12.0 145 15.6 12.3 127 HEWINTA 9519 13.5 12.1 112 17.3 14.7 118 HICKERSON PARK 9145 8.7 7.7 113 10.2 8.0 128 HOLE-IN-ROCK 9150 8.7 7.2 121 10.8 7.5 144 INDIAN CREEK 9425 32.3 28.2 115 28.0 25.7 109 KELLEY R.S. 8180 21.4 17.1 125 24.4 20.6 118 STEEL CREEK PARK 10200 17.5 15.9 110 19.9 16.3 122 ----- ----- Basin wide percent of average 119 120 UPPER BEAR RIVER BUG LAKE 7950 30.5 21.2 144 29.8 19.5 153 HAYDEN FORK 9212 24.1 16.6 145 29.2 21.2 138 KELLEY R.S. 8180 21.4 17.1 125 24.4 20.6 118 LILY LAKE 9156 21.6 13.5 160 21.8 17.6 124 MONTE CRISTO 8960 39.2 30.1 130 37.5 25.7 146 SALT RIVER SUMMIT 7760 17.7 14.6 121 22.3 19.0 117 TRIAL LAKE 9992 36.0 25.3 142 34.2 25.2 136 ----- ----- Basin wide percent of average 138 134 ----------------------------------------------------------------------------- -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.