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 MONDAY: MARCH 21 , 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 17.8 113 22.8 20.6 111 COTTONWOOD CREEK 7670 26.3 22.6 116 33.1 26.1 127 GRAND TARGHEE 9260 43.6 -M * -M -M * GRANITE CREEK 6770 20.6 18.4 112 21.7 19.3 112 GRASSY LAKE 7265 37.2 34.1 109 38.6 34.6 112 GROS VENTRE SUMMIT 8750 14.2 13.5 105 13.7 12.3 111 GUNSIGHT PASS 9820 16.2 -M * 15.8 -M * LEWIS LAKE DIVIDE 7850 38.0 34.0 112 -M 35.4 * PHILLIPS BENCH 8200 29.8 27.6 108 29.8 27.8 107 SALT RIVER SUMMIT 7760 16.6 13.8 120 20.7 17.8 116 SNAKE RIVER STATION 6920 -M 18.8 * 25.0 21.5 116 SPRING CREEK DIVIDE 9000 32.7 25.3 129 30.7 25.2 122 THUMB DIVIDE 7980 21.1 18.2 116 19.2 18.1 106 TOGWOTEE PASS 9580 27.0 23.6 114 28.5 23.4 122 TWO OCEAN PLATEAU 9240 -M 26.6 * -M 26.5 * WILLOW CREEK 8380 33.8 29.0 117 37.8 30.6 124 ----- ----- Basin wide percent of average 114 116 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.7 22.5 110 23.7 19.2 123 BLACK BEAR 8170 44.6 37.7 118 41.4 38.4 108 CANYON 7870 16.4 13.2 124 17.5 14.7 119 FISHER CREEK 9100 38.9 33.3 117 37.4 34.7 108 MADISON PLATEAU 7750 28.4 23.9 119 29.9 25.3 118 NORTHEAST ENTRANCE 7350 13.2 10.9 121 14.3 12.1 118 PARKER PEAK 9400 27.4 20.6 133 23.8 15.4 155 SYLVAN LAKE 8420 22.7 21.4 106 26.1 20.0 131 THUMB DIVIDE 7980 21.1 18.2 116 19.2 18.1 106 TWO OCEAN PLATEAU 9240 -M 26.6 * -M 26.5 * WHISKEY CREEK 6800 20.0 16.4 122 22.5 20.0 113 WHITE MILL 8700 26.4 23.1 114 26.8 25.8 104 WOLVERINE 7650 14.3 11.4 125 14.0 12.3 114 ----- ----- Basin wide percent of average 118 116 WIND RIVER BURROUGHS CREEK 8750 14.3 14.0 102 15.0 15.5 97 CASTLE CREEK 8400 6.6 -M * 7.4 -M * COLD SPRINGS 9630 8.0 8.4 95 7.8 9.7 80 DEER PARK 9700 17.4 16.2 107 20.4 20.6 99 HOBBS PARK 10100 13.7 13.8 99 12.0 11.6 103 LITTLE WARM 9370 12.0 11.1 108 12.2 12.5 98 SOUTH PASS 9040 16.3 16.0 102 14.2 17.2 83 ST. LAWRENCE ALT 8620 4.6 6.8 68 6.5 8.1 80 TOGWOTEE PASS 9580 27.0 23.6 114 28.5 23.4 122 TOWNSEND CREEK 8700 8.1 8.1 100 10.2 10.5 97 ----- ----- Basin wide percent of average 103 98 BIGHORN BASIN BALD MTN. 9380 20.7 18.4 113 17.2 16.2 106 BEAR TRAP MEADOW 8200 7.1 5.2 137 7.4 7.5 99 BLACKWATER 9780 24.8 23.2 107 24.1 19.4 124 BONE SPRINGS DIV 9350 17.7 15.1 117 14.8 13.5 110 EVENING STAR 9200 29.9 28.2 106 32.3 24.2 133 GRAVE SPRINGS 8550 7.8 8.6 91 7.8 9.0 87 KIRWIN 9550 10.8 10.5 103 11.9 10.5 113 MARQUETTE 8760 2.6 -M * 5.9 8.8 67 MIDDLE POWDER 7760 8.6 10.9 79 10.4 11.3 92 OWL CREEK 8975 5.2 5.1 102 5.2 5.2 100 POWDER RIVER PASS 9480 12.8 10.1 127 15.0 11.4 132 SHELL CREEK 9580 15.4 13.7 112 14.0 12.3 114 SYLVAN LAKE 8420 22.7 21.4 106 26.1 20.0 131 SYLVAN ROAD 7120 15.1 12.3 123 19.3 17.0 114 TIMBER CREEK 7950 3.6 5.2 69 4.4 6.6 67 YOUNTS PEAK 8350 16.8 16.4 102 14.5 15.4 94 ----- ----- Basin wide percent of average 107 111 SHOSHONE RIVER BLACKWATER 9780 24.8 23.2 107 24.1 19.4 124 EVENING STAR 9200 29.9 28.2 106 32.3 24.2 133 KIRWIN 9550 10.8 10.5 103 11.9 10.5 113 MARQUETTE 8760 2.6 -M * 5.9 8.8 67 SYLVAN LAKE 8420 22.7 21.4 106 26.1 20.0 131 SYLVAN ROAD 7120 15.1 12.3 123 19.3 17.0 114 YOUNTS PEAK 8350 16.8 16.4 102 14.5 15.4 94 ----- ----- Basin wide percent of average 107 116 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.1 5.2 137 7.4 7.5 99 BIG GOOSE 7990 7.3 9.3 78 9.0 7.8 115 BONE SPRINGS DIV 9350 17.7 15.1 117 14.8 13.5 110 BURGESS JUNCTION 7880 9.7 10.7 91 10.7 11.1 96 CLOUD PEAK RESERVOIR 9860 14.4 12.2 118 13.7 11.6 118 DOME LAKE 8880 11.9 11.3 105 11.9 11.9 100 GRAVE SPRINGS 8550 7.8 8.6 91 7.8 9.0 87 HANSEN SAWMILL 8360 6.5 6.2 105 7.1 7.5 95 LITTLE GOOSE 8870 8.1 -M * 12.4 -M * MIDDLE POWDER 7760 8.6 10.9 79 10.4 11.3 92 POWDER RIVER PASS 9480 12.8 10.1 127 15.0 11.4 132 SOLDIER PARK 8720 7.1 -M * 8.1 -M * SUCKER CREEK 8880 11.7 10.8 108 12.9 12.4 104 TIE CREEK 6870 6.1 6.1 100 8.9 9.1 98 ----- ----- Basin wide percent of average 104 104 BELLE FOURCHE BLIND PARK 6890 9.0 8.6 105 15.3 10.4 147 COLE CANYON 5910 7.4 6.5 114 10.9 6.2 176 NORTH RAPID CREEK 6130 8.1 7.8 104 13.1 8.2 160 ----- ----- Basin wide percent of average 107 158 UPPER N. PLATTE RIVER CINNABAR PARK 9574 23.4 17.4 134 23.3 19.0 123 COLUMBINE 9160 31.5 24.4 129 32.6 23.8 137 DIVIDE PEAK 8880 21.9 18.6 118 25.5 19.6 130 ELK RIVER 8700 24.0 18.4 130 25.1 18.4 136 JOE WRIGHT 10120 29.2 19.8 147 32.9 23.2 142 NORTH FRENCH CREEK 10130 41.1 26.9 153 32.3 23.2 139 OLD BATTLE 10000 39.2 30.4 129 29.2 32.8 89 SAGE CREEK BASIN 7850 19.6 10.8 181 17.2 11.3 152 SOUTH BRUSH CREEK 8440 17.8 12.3 145 20.6 15.2 136 TOWER 10500 50.8 42.8 119 46.1 36.3 127 WEBBER SPRINGS 9250 28.7 25.3 113 33.5 25.2 133 WILLOW CREEK PASS 9540 18.3 11.1 165 17.0 11.9 143 ----- ----- Basin wide percent of average 134 129 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 29.2 22.0 133 29.0 20.5 141 CASPER MTN. 7900 10.7 13.2 81 13.1 13.0 101 DEADMAN HILL 10220 20.4 15.1 135 20.8 15.7 132 DEER PARK 9700 17.4 16.2 107 20.4 20.6 99 LAPRELE CREEK 8375 11.9 10.4 114 13.1 11.6 113 RENO HILL 8400 13.2 12.8 103 15.5 13.6 114 ROACH 9700 19.5 15.9 123 22.6 17.4 130 SAND LAKE 10050 34.4 30.2 114 32.7 22.4 146 SOUTH PASS 9040 16.3 16.0 102 14.2 17.2 83 WINDY PEAK 7900 9.9 7.6 130 12.3 9.8 126 ----- ----- Basin wide percent of average 115 120 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 -M 11.5 * 13.1 14.7 89 DIVIDE PEAK 8880 21.9 18.6 118 25.5 19.6 130 OLD BATTLE 10000 39.2 30.4 129 29.2 32.8 89 SANDSTONE RS 8150 15.3 14.7 104 23.9 17.8 134 WHISKEY PARK 8950 -M 28.6 * 37.3 27.0 138 ----- ----- Basin wide percent of average 120 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.0 13.8 101 14.1 12.7 111 BLIND BULL SUM 8650 29.2 26.8 109 20.6 21.3 97 EAST RIM DIVIDE 7930 14.8 12.6 117 12.5 11.6 108 ELKHART PARK G.S. 9400 12.6 12.8 98 12.4 12.6 98 GROS VENTRE SUMMIT 8750 14.2 13.5 105 13.7 12.3 111 GUNSIGHT PASS 9820 16.2 -M * 15.8 -M * KENDALL R.S. 7740 12.9 14.4 90 14.5 14.1 103 LOOMIS PARK 8240 19.4 16.8 115 19.4 16.7 116 NEW FORK LAKE 8340 12.2 10.8 113 11.0 10.8 102 POCKET CREEK 9360 11.1 -M * 13.3 -M * SNIDER BASIN 8060 19.7 14.1 140 18.4 15.4 119 SPRING CREEK DIVIDE 9000 32.7 25.3 129 30.7 25.2 122 TRIPLE PEAK 8500 29.9 23.9 125 31.1 23.6 132 ----- ----- Basin wide percent of average 115 113 LOWER GREEN RIVER HAMS FORK 7840 16.6 12.4 134 14.9 11.6 128 HEWINTA 9519 12.1 11.0 110 15.9 13.5 118 HICKERSON PARK 9145 8.4 6.8 124 9.7 7.3 133 HOLE-IN-ROCK 9150 8.1 6.6 123 10.1 6.8 149 INDIAN CREEK 9425 29.8 26.3 113 26.2 24.0 109 KELLEY R.S. 8180 19.8 16.2 122 22.6 19.3 117 STEEL CREEK PARK 10200 13.4 14.8 91 18.9 15.0 126 ----- ----- Basin wide percent of average 115 121 UPPER BEAR RIVER BUG LAKE 7950 27.8 19.9 140 27.4 18.3 150 HAYDEN FORK 9212 22.2 15.5 143 27.6 19.7 140 KELLEY R.S. 8180 19.8 16.2 122 22.6 19.3 117 LILY LAKE 9156 20.0 12.4 161 20.8 16.4 127 MONTE CRISTO 8960 35.4 28.7 123 34.3 24.1 142 SALT RIVER SUMMIT 7760 16.6 13.8 120 20.7 17.8 116 TRIAL LAKE 9992 33.6 23.9 141 32.2 23.6 136 ----- ----- Basin wide percent of average 135 133 ----------------------------------------------------------------------------- -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.