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: MAY 11 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.4 8.3 173 30.9 25.2 123 COTTONWOOD CREEK 7670 21.9 15.8 139 29.6 33.4 89 GRAND TARGHEE 9260 57.2 -M * 40.1 -M * GRANITE CREEK 6770 14.0 9.4 149 25.5 23.2 110 GRASSY LAKE 7265 -M 28.8 * 49.0 42.3 116 GROS VENTRE SUMMIT 8750 12.4 11.0 113 16.7 16.1 104 GUNSIGHT PASS 9820 13.2 -M * 17.7 -M * LEWIS LAKE DIVIDE 7850 39.2 30.9 127 41.8 43.0 97 PHILLIPS BENCH 8200 31.9 26.0 123 39.0 34.3 114 SALT RIVER SUMMIT 7760 10.3 6.7 154 18.6 22.5 83 SNAKE RIVER STATION 6920 14.4 7.7 187 31.2 26.5 118 SPRING CREEK DIVIDE 9000 23.5 26.2 90 27.2 31.2 87 THUMB DIVIDE 7980 14.9 11.3 132 23.5 23.0 102 TOGWOTEE PASS 9580 30.8 27.9 110 34.8 30.3 115 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 * WILLOW CREEK 8380 30.3 27.2 111 45.4 39.5 115 ----- ----- Basin wide percent of average 124 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.9 25.9 112 27.9 24.7 113 BLACK BEAR 8170 -M 37.8 * 48.3 47.4 102 CANYON 7870 16.5 8.3 199 23.9 18.6 128 FISHER CREEK 9100 47.5 37.5 127 44.5 43.5 102 MADISON PLATEAU 7750 30.7 21.2 145 36.9 31.6 117 NORTHEAST ENTRANCE 7350 5.8 4.7 123 16.1 15.7 103 PARKER PEAK 9400 32.1 24.3 132 -M 20.7 * SYLVAN LAKE 8420 21.2 21.6 98 31.0 26.0 119 THUMB DIVIDE 7980 14.9 11.3 132 23.5 23.0 102 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 33.5 * WHISKEY CREEK 6800 19.0 11.7 162 28.6 25.2 113 WHITE MILL 8700 32.0 25.7 125 31.9 32.6 98 WOLVERINE 7650 6.2 4.5 138 16.7 16.2 103 ----- ----- Basin wide percent of average 130 108 WIND RIVER BURROUGHS CREEK 8750 16.0 11.2 143 21.2 20.4 104 COLD SPRINGS 9630 1.0 4.1 24 12.5 15.1 83 DEER PARK 9700 15.8 16.8 94 24.1 28.2 85 HOBBS PARK 10100 16.6 17.4 95 18.8 18.4 102 LITTLE WARM 9370 8.9 8.7 102 17.4 18.0 97 SOUTH PASS 9040 13.9 15.5 90 21.0 24.1 87 ST. LAWRENCE ALT 8620 2.4 4.7 51 10.6 13.3 80 TOGWOTEE PASS 9580 30.8 27.9 110 34.8 30.3 115 TOWNSEND CREEK 8700 6.8 6.8 100 15.4 16.8 92 ----- ----- Basin wide percent of average 99 95 BIGHORN BASIN BALD MTN. 9380 20.2 23.5 86 19.4 22.8 85 BEAR TRAP MEADOW 8200 5.3 1.3 408 12.5 12.0 104 BLACKWATER 9780 30.3 28.7 106 28.7 26.1 110 BONE SPRINGS DIV 9350 21.2 17.1 124 22.3 19.7 113 EVENING STAR 9200 32.5 33.0 98 39.4 31.4 125 GRAVE SPRINGS 8550 11.8 9.4 126 14.1 14.3 99 KIRWIN 9550 12.8 12.0 107 17.2 15.4 112 MARQUETTE 8760 9.5 9.8 97 14.0 15.2 92 MIDDLE POWDER 7760 15.6 12.1 129 14.1 17.0 83 OWL CREEK 8975 .1 3.0 3 8.7 9.1 96 POWDER RIVER PASS 9480 12.7 9.0 141 18.5 17.1 108 SHELL CREEK 9580 19.1 16.8 114 19.9 18.1 110 SYLVAN LAKE 8420 21.2 21.6 98 31.0 26.0 119 SYLVAN ROAD 7120 5.4 4.1 132 23.7 21.5 110 TIMBER CREEK 7950 3.5 3.0 117 11.4 11.9 96 YOUNTS PEAK 8350 17.5 16.6 105 19.9 19.8 101 ----- ----- Basin wide percent of average 108 106 SHOSHONE RIVER BLACKWATER 9780 30.3 28.7 106 28.7 26.1 110 EVENING STAR 9200 32.5 33.0 98 39.4 31.4 125 KIRWIN 9550 12.8 12.0 107 17.2 15.4 112 MARQUETTE 8760 9.5 9.8 97 14.0 15.2 92 SYLVAN LAKE 8420 21.2 21.6 98 31.0 26.0 119 SYLVAN ROAD 7120 5.4 4.1 132 23.7 21.5 110 YOUNTS PEAK 8350 17.5 16.6 105 19.9 19.8 101 ----- ----- Basin wide percent of average 103 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.3 1.3 408 12.5 12.0 104 BIG GOOSE 7990 11.5 9.9 116 17.2 14.3 120 BONE SPRINGS DIV 9350 21.2 17.1 124 22.3 19.7 113 BURGESS JUNCTION 7880 16.7 11.4 146 19.1 16.6 115 CLOUD PEAK RESERVOIR 9860 20.0 15.5 129 20.9 18.8 111 DOME LAKE 8880 13.1 11.4 115 20.3 18.2 112 GRAVE SPRINGS 8550 11.8 9.4 126 14.1 14.3 99 HANSEN SAWMILL 8360 3.5 3.2 109 12.3 12.0 103 MIDDLE POWDER 7760 15.6 12.1 129 14.1 17.0 83 POWDER RIVER PASS 9480 12.7 9.0 141 18.5 17.1 108 SUCKER CREEK 8880 17.7 11.2 158 22.5 19.0 118 TIE CREEK 6870 6.1 2.4 254 16.4 14.9 110 ----- ----- Basin wide percent of average 136 108 BELLE FOURCHE BLIND PARK 6890 2.2 1.3 169 16.1 15.4 105 COLE CANYON 5910 4.7 1.4 336 13.9 10.8 129 NORTH RAPID CREEK 6130 6.9 1.1 627 16.0 12.4 129 ----- ----- Basin wide percent of average 363 119 UPPER N. PLATTE RIVER COLUMBINE 9160 22.5 15.7 143 34.0 30.3 112 DIVIDE PEAK 8880 21.1 15.0 141 28.1 25.4 111 ELK RIVER 8700 18.1 9.8 185 28.0 24.1 116 JOE WRIGHT 10120 29.3 24.6 119 35.9 31.8 113 NORTH FRENCH CREEK 10130 34.4 34.0 101 36.6 31.4 117 OLD BATTLE 10000 39.2 36.6 107 46.9 41.6 113 SAGE CREEK BASIN 7850 10.0 8.7 115 20.0 14.8 135 SOUTH BRUSH CREEK 8440 6.9 7.9 87 20.8 21.4 97 TOWER 10500 50.6 52.2 97 49.8 47.1 106 WEBBER SPRINGS 9250 25.5 20.6 124 37.1 32.5 114 WILLOW CREEK PASS 9540 21.6 12.6 171 21.0 16.7 126 ----- ----- Basin wide percent of average 117 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 21.4 25.3 85 27.6 28.6 97 CASPER MTN. 7900 16.6 13.7 121 20.5 21.2 97 DEADMAN HILL 10220 21.2 18.9 112 25.0 22.4 112 DEER PARK 9700 15.8 16.8 94 24.1 28.2 85 LAPRELE CREEK 8375 4.9 4.6 107 15.9 17.8 89 RENO HILL 8400 17.9 11.4 157 25.0 21.9 114 ROACH 9700 20.4 15.3 133 27.6 23.9 115 SAND LAKE 10050 34.6 36.4 95 36.7 31.2 118 SOUTH PASS 9040 13.9 15.5 90 21.0 24.1 87 WINDY PEAK 7900 4.4 2.5 176 13.9 14.7 95 ----- ----- Basin wide percent of average 107 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 1.1 1.7 65 20.1 19.5 103 DIVIDE PEAK 8880 21.1 15.0 141 28.1 25.4 111 OLD BATTLE 10000 39.2 36.6 107 46.9 41.6 113 SANDSTONE RS 8150 11.5 5.3 217 25.4 23.0 110 WHISKEY PARK 8950 36.2 28.3 128 42.7 35.5 120 ----- ----- Basin wide percent of average 126 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.6 10.5 101 15.8 16.9 93 BLIND BULL SUM 8650 27.8 26.0 107 20.5 26.2 78 EAST RIM DIVIDE 7930 5.8 10.6 55 12.8 14.6 88 ELKHART PARK G.S. 9400 10.3 10.6 97 13.9 17.0 82 GROS VENTRE SUMMIT 8750 12.4 11.0 113 16.7 16.1 104 GUNSIGHT PASS 9820 13.2 -M * 17.7 -M * KENDALL R.S. 7740 5.7 5.7 100 15.6 17.2 91 LOOMIS PARK 8240 10.6 11.2 95 20.4 20.8 98 NEW FORK LAKE 8340 5.0 5.3 94 11.3 14.2 80 SNIDER BASIN 8060 8.7 9.3 94 16.0 19.2 83 SPRING CREEK DIVIDE 9000 23.5 26.2 90 27.2 31.2 87 TRIPLE PEAK 8500 22.3 19.4 115 33.2 29.9 111 ----- ----- Basin wide percent of average 98 91 LOWER GREEN RIVER HAMS FORK 7840 5.2 2.6 200 12.5 15.6 80 HEWINTA 9519 8.1 5.9 137 19.8 18.7 106 HICKERSON PARK 9145 .0 3.1 0 11.0 11.0 100 HOLE-IN-ROCK 9150 .5 2.5 20 11.8 10.6 111 INDIAN CREEK 9425 -M 25.4 * -M 30.6 * KELLEY R.S. 8180 12.6 10.7 118 20.9 24.5 85 STEEL CREEK PARK 10200 19.6 18.7 105 21.9 21.3 103 ----- ----- Basin wide percent of average 106 96 UPPER BEAR RIVER BUG LAKE 7950 14.8 13.1 113 19.5 23.4 83 HAYDEN FORK 9212 10.7 9.1 118 26.8 26.3 102 KELLEY R.S. 8180 12.6 10.7 118 20.9 24.5 85 LILY LAKE 9156 10.1 7.7 131 20.9 22.2 94 MONTE CRISTO 8960 27.0 24.6 110 30.1 31.7 95 SALT RIVER SUMMIT 7760 10.3 6.7 154 18.6 22.5 83 TRIAL LAKE 9992 22.4 24.6 91 28.4 30.8 92 ----- ----- Basin wide percent of average 112 91 ----------------------------------------------------------------------------- -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 1961-90. 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.