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: MAY 12 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 14.1 7.9 178 31.0 25.3 123 COTTONWOOD CREEK 7670 21.8 15.3 142 29.7 33.5 89 GRAND TARGHEE 9260 58.0 -M * 40.9 -M * GRANITE CREEK 6770 13.6 9.0 151 25.5 23.3 109 GRASSY LAKE 7265 -M 28.3 * 49.4 42.4 117 GROS VENTRE SUMMIT 8750 12.2 10.8 113 16.7 16.1 104 GUNSIGHT PASS 9820 12.7 -M * 17.9 -M * LEWIS LAKE DIVIDE 7850 39.1 30.5 128 42.0 43.1 97 PHILLIPS BENCH 8200 31.5 25.5 124 39.1 34.4 114 SALT RIVER SUMMIT 7760 10.1 6.2 163 18.7 22.6 83 SNAKE RIVER STATION 6920 13.5 7.2 188 31.6 26.6 119 SPRING CREEK DIVIDE 9000 23.3 25.9 90 27.3 31.3 87 THUMB DIVIDE 7980 14.7 10.9 135 23.7 23.1 103 TOGWOTEE PASS 9580 30.9 27.8 111 35.0 30.4 115 TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 * WILLOW CREEK 8380 30.2 26.8 113 45.9 39.7 116 ----- ----- Basin wide percent of average 125 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 29.3 25.7 114 28.4 24.9 114 BLACK BEAR 8170 48.0 37.5 128 48.8 47.6 103 CANYON 7870 16.2 8.0 202 24.2 18.7 129 FISHER CREEK 9100 47.6 37.3 128 44.6 43.7 102 MADISON PLATEAU 7750 31.2 20.9 149 37.3 31.7 118 NORTHEAST ENTRANCE 7350 5.5 4.4 125 16.3 15.8 103 PARKER PEAK 9400 32.9 24.2 136 29.9 20.9 143 SYLVAN LAKE 8420 21.7 21.3 102 31.7 26.2 121 THUMB DIVIDE 7980 14.7 10.9 135 23.7 23.1 103 TWO OCEAN PLATEAU 9240 -M 31.1 * -M 33.7 * WHISKEY CREEK 6800 18.9 11.3 167 28.7 25.3 113 WHITE MILL 8700 32.1 25.5 126 32.1 32.7 98 WOLVERINE 7650 6.0 4.2 143 17.0 16.4 104 ----- ----- Basin wide percent of average 132 111 WIND RIVER BURROUGHS CREEK 8750 15.7 11.1 141 21.3 20.5 104 COLD SPRINGS 9630 .4 4.0 10 12.6 15.2 83 DEER PARK 9700 15.7 17.0 92 24.1 28.4 85 HOBBS PARK 10100 16.3 17.3 94 19.1 18.5 103 LITTLE WARM 9370 8.7 8.5 102 17.6 18.1 97 SOUTH PASS 9040 13.4 15.1 89 21.0 24.2 87 ST. LAWRENCE ALT 8620 1.4 4.5 31 10.7 13.4 80 TOGWOTEE PASS 9580 30.9 27.8 111 35.0 30.4 115 TOWNSEND CREEK 8700 6.1 6.5 94 15.4 16.9 91 ----- ----- Basin wide percent of average 97 95 BIGHORN BASIN BALD MTN. 9380 20.0 23.5 85 19.6 23.0 85 BEAR TRAP MEADOW 8200 4.6 1.1 418 12.5 12.1 103 BLACKWATER 9780 31.0 28.8 108 29.3 26.2 112 BONE SPRINGS DIV 9350 20.7 16.9 122 22.4 19.9 113 EVENING STAR 9200 33.0 32.9 100 39.7 31.5 126 GRAVE SPRINGS 8550 11.5 9.2 125 14.1 14.4 98 KIRWIN 9550 12.6 11.9 106 17.3 15.5 112 MARQUETTE 8760 9.5 9.6 99 14.0 15.3 92 MIDDLE POWDER 7760 15.4 11.9 129 14.0 17.1 82 OWL CREEK 8975 .1 2.8 4 8.7 9.2 95 POWDER RIVER PASS 9480 12.5 8.8 142 18.5 17.3 107 SHELL CREEK 9580 19.0 16.7 114 20.0 18.3 109 SYLVAN LAKE 8420 21.7 21.3 102 31.7 26.2 121 SYLVAN ROAD 7120 4.9 3.7 132 24.3 21.6 112 TIMBER CREEK 7950 3.0 2.8 107 11.4 12.0 95 YOUNTS PEAK 8350 17.1 16.5 104 20.1 20.0 101 ----- ----- Basin wide percent of average 108 106 SHOSHONE RIVER BLACKWATER 9780 31.0 28.8 108 29.3 26.2 112 EVENING STAR 9200 33.0 32.9 100 39.7 31.5 126 KIRWIN 9550 12.6 11.9 106 17.3 15.5 112 MARQUETTE 8760 9.5 9.6 99 14.0 15.3 92 SYLVAN LAKE 8420 21.7 21.3 102 31.7 26.2 121 SYLVAN ROAD 7120 4.9 3.7 132 24.3 21.6 112 YOUNTS PEAK 8350 17.1 16.5 104 20.1 20.0 101 ----- ----- Basin wide percent of average 104 113 POWDER-TONGUE BEAR TRAP MEADOW 8200 4.6 1.1 418 12.5 12.1 103 BIG GOOSE 7990 11.3 9.7 116 17.4 14.5 120 BONE SPRINGS DIV 9350 20.7 16.9 122 22.4 19.9 113 BURGESS JUNCTION 7880 16.4 11.1 148 19.2 16.7 115 CLOUD PEAK RESERVOIR 9860 19.5 15.4 127 21.1 18.9 112 DOME LAKE 8880 12.6 11.2 112 20.4 18.4 111 GRAVE SPRINGS 8550 11.5 9.2 125 14.1 14.4 98 HANSEN SAWMILL 8360 2.4 3.0 80 12.3 12.1 102 MIDDLE POWDER 7760 15.4 11.9 129 14.0 17.1 82 POWDER RIVER PASS 9480 12.5 8.8 142 18.5 17.3 107 SUCKER CREEK 8880 17.4 11.0 158 22.8 19.1 119 TIE CREEK 6870 5.4 2.1 257 16.4 15.0 109 ----- ----- Basin wide percent of average 134 108 BELLE FOURCHE BLIND PARK 6890 1.4 .8 175 16.2 15.6 104 COLE CANYON 5910 4.3 1.2 358 14.2 10.9 130 NORTH RAPID CREEK 6130 6.6 .9 733 16.2 12.5 130 ----- ----- Basin wide percent of average 424 119 UPPER N. PLATTE RIVER COLUMBINE 9160 22.5 15.1 149 34.4 30.4 113 DIVIDE PEAK 8880 20.5 14.5 141 28.2 25.6 110 ELK RIVER 8700 17.3 9.2 188 28.2 24.2 117 JOE WRIGHT 10120 29.2 24.4 120 36.0 32.0 112 NORTH FRENCH CREEK 10130 34.5 33.8 102 36.6 31.6 116 OLD BATTLE 10000 39.2 36.4 108 47.0 41.7 113 SAGE CREEK BASIN 7850 8.0 8.4 95 20.0 14.8 135 SOUTH BRUSH CREEK 8440 5.7 7.6 75 21.0 21.5 98 TOWER 10500 51.0 52.1 98 49.9 47.3 105 WEBBER SPRINGS 9250 24.9 20.0 124 37.1 32.6 114 WILLOW CREEK PASS 9540 21.5 12.3 175 21.0 16.8 125 ----- ----- Basin wide percent of average 117 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 21.0 24.8 85 27.6 28.7 96 CASPER MTN. 7900 16.5 13.2 125 20.6 21.3 97 DEADMAN HILL 10220 21.3 18.7 114 25.0 22.5 111 DEER PARK 9700 15.7 17.0 92 24.1 28.4 85 LAPRELE CREEK 8375 4.4 4.3 102 16.1 17.9 90 RENO HILL 8400 17.7 10.9 162 25.3 22.1 114 ROACH 9700 20.0 14.8 135 27.6 24.0 115 SAND LAKE 10050 34.9 36.2 96 36.9 31.3 118 SOUTH PASS 9040 13.4 15.1 89 21.0 24.2 87 WINDY PEAK 7900 3.8 2.3 165 13.8 14.8 93 ----- ----- Basin wide percent of average 107 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .1 1.5 7 20.1 19.6 103 DIVIDE PEAK 8880 20.5 14.5 141 28.2 25.6 110 OLD BATTLE 10000 39.2 36.4 108 47.0 41.7 113 SANDSTONE RS 8150 10.1 4.9 206 25.4 23.1 110 WHISKEY PARK 8950 36.1 27.9 129 42.8 35.6 120 ----- ----- Basin wide percent of average 124 112 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.5 10.2 103 16.0 16.9 95 BLIND BULL SUM 8650 27.7 25.8 107 20.5 26.3 78 EAST RIM DIVIDE 7930 5.5 10.3 53 12.9 14.7 88 ELKHART PARK G.S. 9400 10.1 10.3 98 14.0 17.1 82 GROS VENTRE SUMMIT 8750 12.2 10.8 113 16.7 16.1 104 GUNSIGHT PASS 9820 12.7 -M * 17.9 -M * KENDALL R.S. 7740 5.2 5.2 100 15.7 17.3 91 LOOMIS PARK 8240 10.1 10.8 94 20.5 20.9 98 NEW FORK LAKE 8340 4.6 4.9 94 11.4 14.3 80 SNIDER BASIN 8060 8.1 8.9 91 16.1 19.3 83 SPRING CREEK DIVIDE 9000 23.3 25.9 90 27.3 31.3 87 TRIPLE PEAK 8500 21.8 18.9 115 33.3 30.0 111 ----- ----- Basin wide percent of average 98 91 LOWER GREEN RIVER HAMS FORK 7840 4.2 2.2 191 12.6 15.7 80 HEWINTA 9519 6.5 5.5 118 19.8 18.8 105 HICKERSON PARK 9145 .3 2.8 11 11.3 11.1 102 HOLE-IN-ROCK 9150 .2 2.3 9 11.9 10.7 111 INDIAN CREEK 9425 -M 25.0 * -M 30.7 * KELLEY R.S. 8180 12.3 10.3 119 21.0 24.6 85 STEEL CREEK PARK 10200 19.4 18.6 104 21.9 21.4 102 ----- ----- Basin wide percent of average 103 96 UPPER BEAR RIVER BUG LAKE 7950 14.7 12.5 118 19.7 23.5 84 HAYDEN FORK 9212 8.3 8.6 97 27.0 26.4 102 KELLEY R.S. 8180 12.3 10.3 119 21.0 24.6 85 LILY LAKE 9156 9.0 7.4 122 21.0 22.3 94 MONTE CRISTO 8960 25.2 24.1 105 30.2 31.9 95 SALT RIVER SUMMIT 7760 10.1 6.2 163 18.7 22.6 83 TRIAL LAKE 9992 21.3 24.3 88 28.4 30.9 92 ----- ----- Basin wide percent of average 108 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.