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 SUNDAY: MARCH 20 , 2011 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.1 17.7 114 22.9 20.6 111 COTTONWOOD CREEK 7670 26.2 22.5 116 33.0 25.9 127 GRAND TARGHEE 9260 43.3 -M * -M -M * GRANITE CREEK 6770 20.3 18.3 111 21.5 19.3 111 GRASSY LAKE 7265 37.1 33.9 109 38.4 34.5 111 GROS VENTRE SUMMIT 8750 14.1 13.4 105 13.6 12.2 111 GUNSIGHT PASS 9820 16.0 -M * 15.6 -M * LEWIS LAKE DIVIDE 7850 37.6 33.8 111 -M 35.2 * PHILLIPS BENCH 8200 29.3 27.4 107 29.4 27.7 106 SALT RIVER SUMMIT 7760 16.6 13.8 120 20.5 17.7 116 SNAKE RIVER STATION 6920 -M 18.7 * 24.9 21.4 116 SPRING CREEK DIVIDE 9000 32.5 25.2 129 30.6 25.1 122 THUMB DIVIDE 7980 20.8 18.1 115 19.1 18.0 106 TOGWOTEE PASS 9580 26.8 23.5 114 28.4 23.2 122 TWO OCEAN PLATEAU 9240 -M 26.4 * -M 26.4 * WILLOW CREEK 8380 33.8 28.8 117 37.8 30.5 124 ----- ----- Basin wide percent of average 114 116 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.4 22.4 109 23.5 19.1 123 BLACK BEAR 8170 44.3 37.5 118 41.3 38.2 108 CANYON 7870 16.4 13.1 125 17.4 14.7 118 FISHER CREEK 9100 38.9 33.2 117 37.4 34.5 108 MADISON PLATEAU 7750 28.2 23.8 118 29.3 25.2 116 NORTHEAST ENTRANCE 7350 13.2 10.8 122 14.3 12.0 119 PARKER PEAK 9400 27.2 20.4 133 -M 15.4 * SYLVAN LAKE 8420 22.6 21.3 106 26.1 19.9 131 THUMB DIVIDE 7980 20.8 18.1 115 19.1 18.0 106 TWO OCEAN PLATEAU 9240 -M 26.4 * -M 26.4 * WHISKEY CREEK 6800 20.0 16.3 123 22.5 19.9 113 WHITE MILL 8700 26.4 23.0 115 26.6 25.6 104 WOLVERINE 7650 14.2 11.4 125 13.7 12.2 112 ----- ----- Basin wide percent of average 118 113 WIND RIVER BURROUGHS CREEK 8750 14.3 14.0 102 14.9 15.4 97 CASTLE CREEK 8400 6.6 -M * 7.2 -M * COLD SPRINGS 9630 7.8 8.3 94 7.7 9.6 80 DEER PARK 9700 17.4 16.0 109 20.3 20.5 99 HOBBS PARK 10100 13.6 13.6 100 11.6 11.5 101 LITTLE WARM 9370 11.9 11.0 108 12.1 12.4 98 SOUTH PASS 9040 16.2 16.0 101 14.0 17.1 82 ST. LAWRENCE ALT 8620 4.6 6.8 68 6.5 8.0 81 TOGWOTEE PASS 9580 26.8 23.5 114 28.4 23.2 122 TOWNSEND CREEK 8700 8.0 8.0 100 10.2 10.4 98 ----- ----- Basin wide percent of average 103 98 BIGHORN BASIN BALD MTN. 9380 20.6 18.3 113 17.1 16.1 106 BEAR TRAP MEADOW 8200 7.2 5.1 141 7.3 7.4 99 BLACKWATER 9780 24.6 23.1 106 23.9 19.3 124 BONE SPRINGS DIV 9350 17.6 15.0 117 14.6 13.4 109 EVENING STAR 9200 29.6 28.1 105 32.2 24.0 134 GRAVE SPRINGS 8550 7.7 8.6 90 7.8 9.0 87 KIRWIN 9550 10.7 10.5 102 11.7 10.4 113 MARQUETTE 8760 2.4 -M * 5.7 8.7 66 MIDDLE POWDER 7760 8.6 10.7 80 10.4 11.2 93 OWL CREEK 8975 5.2 5.0 104 5.1 5.2 98 POWDER RIVER PASS 9480 12.7 10.1 126 14.9 11.4 131 SHELL CREEK 9580 15.4 13.6 113 14.0 12.2 115 SYLVAN LAKE 8420 22.6 21.3 106 26.1 19.9 131 SYLVAN ROAD 7120 15.2 12.3 124 19.3 16.9 114 TIMBER CREEK 7950 3.6 5.2 69 4.4 6.5 68 YOUNTS PEAK 8350 16.7 16.3 102 14.4 15.3 94 ----- ----- Basin wide percent of average 107 111 SHOSHONE RIVER BLACKWATER 9780 24.6 23.1 106 23.9 19.3 124 EVENING STAR 9200 29.6 28.1 105 32.2 24.0 134 KIRWIN 9550 10.7 10.5 102 11.7 10.4 113 MARQUETTE 8760 2.4 -M * 5.7 8.7 66 SYLVAN LAKE 8420 22.6 21.3 106 26.1 19.9 131 SYLVAN ROAD 7120 15.2 12.3 124 19.3 16.9 114 YOUNTS PEAK 8350 16.7 16.3 102 14.4 15.3 94 ----- ----- Basin wide percent of average 107 116 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.2 5.1 141 7.3 7.4 99 BIG GOOSE 7990 7.3 9.2 79 8.9 7.7 116 BONE SPRINGS DIV 9350 17.6 15.0 117 14.6 13.4 109 BURGESS JUNCTION 7880 9.7 10.6 92 10.6 11.0 96 CLOUD PEAK RESERVOIR 9860 14.4 12.1 119 13.2 11.5 115 DOME LAKE 8880 11.9 11.2 106 11.9 11.8 101 GRAVE SPRINGS 8550 7.7 8.6 90 7.8 9.0 87 HANSEN SAWMILL 8360 6.4 6.1 105 7.0 7.4 95 LITTLE GOOSE 8870 8.1 -M * 12.4 -M * MIDDLE POWDER 7760 8.6 10.7 80 10.4 11.2 93 POWDER RIVER PASS 9480 12.7 10.1 126 14.9 11.4 131 SOLDIER PARK 8720 7.1 -M * 8.1 -M * SUCKER CREEK 8880 11.6 10.7 108 12.8 12.3 104 TIE CREEK 6870 6.1 6.2 98 8.9 9.0 99 ----- ----- Basin wide percent of average 105 104 BELLE FOURCHE BLIND PARK 6890 9.2 8.6 107 15.4 10.4 148 COLE CANYON 5910 7.5 6.4 117 10.9 6.2 176 NORTH RAPID CREEK 6130 8.2 7.7 106 13.1 8.1 162 ----- ----- Basin wide percent of average 110 160 UPPER N. PLATTE RIVER CINNABAR PARK 9574 23.3 17.4 134 23.4 18.9 124 COLUMBINE 9160 31.5 24.3 130 32.6 23.7 138 DIVIDE PEAK 8880 21.7 18.4 118 25.4 19.4 131 ELK RIVER 8700 23.9 18.3 131 25.1 18.3 137 JOE WRIGHT 10120 29.0 19.7 147 32.9 23.0 143 NORTH FRENCH CREEK 10130 41.0 26.7 154 32.3 23.0 140 OLD BATTLE 10000 39.2 30.2 130 29.1 32.5 90 SAGE CREEK BASIN 7850 19.4 10.7 181 17.2 11.3 152 SOUTH BRUSH CREEK 8440 17.7 12.2 145 20.6 15.1 136 TOWER 10500 51.0 42.6 120 46.1 36.1 128 WEBBER SPRINGS 9250 28.6 25.1 114 33.4 25.0 134 WILLOW CREEK PASS 9540 18.3 11.0 166 17.0 11.9 143 ----- ----- Basin wide percent of average 134 130 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 29.1 21.8 133 28.9 20.3 142 CASPER MTN. 7900 10.6 13.0 82 13.1 12.9 102 DEADMAN HILL 10220 20.4 14.9 137 20.8 15.5 134 DEER PARK 9700 17.4 16.0 109 20.3 20.5 99 LAPRELE CREEK 8375 11.8 10.4 113 13.0 11.6 112 RENO HILL 8400 13.2 12.6 105 15.4 13.4 115 ROACH 9700 19.4 15.8 123 22.6 17.3 131 SAND LAKE 10050 34.3 30.0 114 32.7 22.2 147 SOUTH PASS 9040 16.2 16.0 101 14.0 17.1 82 WINDY PEAK 7900 9.9 7.5 132 12.3 9.7 127 ----- ----- Basin wide percent of average 115 120 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 11.5 * 13.1 14.6 90 DIVIDE PEAK 8880 21.7 18.4 118 25.4 19.4 131 OLD BATTLE 10000 39.2 30.2 130 29.1 32.5 90 SANDSTONE RS 8150 15.1 14.7 103 23.8 17.7 134 WHISKEY PARK 8950 -M 28.4 * 37.2 26.8 139 ----- ----- Basin wide percent of average 120 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.9 13.7 101 14.1 12.7 111 BLIND BULL SUM 8650 28.9 26.6 109 20.6 21.2 97 EAST RIM DIVIDE 7930 14.7 12.5 118 12.4 11.5 108 ELKHART PARK G.S. 9400 12.4 12.7 98 12.3 12.5 98 GROS VENTRE SUMMIT 8750 14.1 13.4 105 13.6 12.2 111 GUNSIGHT PASS 9820 16.0 -M * 15.6 -M * KENDALL R.S. 7740 12.9 14.3 90 14.4 14.0 103 LOOMIS PARK 8240 19.3 16.7 116 19.3 16.6 116 NEW FORK LAKE 8340 12.1 10.8 112 11.0 10.7 103 POCKET CREEK 9360 10.9 -M * 13.2 -M * SNIDER BASIN 8060 19.6 14.0 140 18.4 15.3 120 SPRING CREEK DIVIDE 9000 32.5 25.2 129 30.6 25.1 122 TRIPLE PEAK 8500 29.6 23.8 124 31.0 23.5 132 ----- ----- Basin wide percent of average 114 113 LOWER GREEN RIVER HAMS FORK 7840 16.5 12.4 133 14.9 11.6 128 HEWINTA 9519 12.3 10.9 113 16.3 13.4 122 HICKERSON PARK 9145 8.3 6.8 122 9.6 7.2 133 HOLE-IN-ROCK 9150 8.1 6.6 123 10.0 6.8 147 INDIAN CREEK 9425 29.5 26.1 113 26.0 23.9 109 KELLEY R.S. 8180 19.7 16.1 122 22.6 19.2 118 STEEL CREEK PARK 10200 13.4 14.7 91 18.8 14.8 127 ----- ----- Basin wide percent of average 115 122 UPPER BEAR RIVER BUG LAKE 7950 27.7 19.8 140 27.3 18.2 150 HAYDEN FORK 9212 22.0 15.4 143 27.5 19.6 140 KELLEY R.S. 8180 19.7 16.1 122 22.6 19.2 118 LILY LAKE 9156 19.9 12.3 162 20.6 16.2 127 MONTE CRISTO 8960 35.0 28.5 123 34.3 24.0 143 SALT RIVER SUMMIT 7760 16.6 13.8 120 20.5 17.7 116 TRIAL LAKE 9992 33.3 23.8 140 32.0 23.5 136 ----- ----- Basin wide percent of average 134 134 ----------------------------------------------------------------------------- -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.