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 18 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.4 5.2 200 31.2 25.9 120 COTTONWOOD CREEK 7670 17.8 12.5 142 29.9 34.2 87 GRAND TARGHEE 9260 58.7 -M * 42.0 -M * GRANITE CREEK 6770 9.8 6.7 146 25.5 23.8 107 GRASSY LAKE 7265 30.0 24.7 121 49.8 43.3 115 GROS VENTRE SUMMIT 8750 8.6 8.9 97 16.8 16.6 101 GUNSIGHT PASS 9820 9.7 -M * 18.0 -M * LEWIS LAKE DIVIDE 7850 33.3 27.3 122 42.5 43.8 97 PHILLIPS BENCH 8200 26.6 22.5 118 39.4 35.1 112 SALT RIVER SUMMIT 7760 5.2 3.4 153 18.8 23.1 81 SNAKE RIVER STATION 6920 7.9 4.2 188 31.6 27.2 116 SPRING CREEK DIVIDE 9000 20.2 23.3 87 27.5 31.9 86 THUMB DIVIDE 7980 10.6 8.4 126 24.2 23.7 102 TOGWOTEE PASS 9580 30.9 26.8 115 35.3 31.2 113 TWO OCEAN PLATEAU 9240 45.6 30.1 151 -M 34.5 * WILLOW CREEK 8380 26.1 23.6 111 46.3 40.6 114 ----- ----- Basin wide percent of average 124 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.3 25.1 113 29.0 25.5 114 BLACK BEAR 8170 46.8 35.3 133 49.5 48.4 102 CANYON 7870 13.4 5.9 227 24.5 19.2 128 FISHER CREEK 9100 47.1 35.7 132 45.4 44.6 102 MADISON PLATEAU 7750 28.4 18.0 158 37.8 32.5 116 NORTHEAST ENTRANCE 7350 .4 2.2 18 16.4 16.3 101 PARKER PEAK 9400 31.3 23.6 133 -M 21.6 * SYLVAN LAKE 8420 22.1 19.3 115 32.1 27.0 119 THUMB DIVIDE 7980 10.6 8.4 126 24.2 23.7 102 TWO OCEAN PLATEAU 9240 45.6 30.1 151 -M 34.5 * WHISKEY CREEK 6800 16.3 8.2 199 29.2 25.9 113 WHITE MILL 8700 29.5 23.9 123 32.3 33.5 96 WOLVERINE 7650 1.0 2.0 50 17.4 17.0 102 ----- ----- Basin wide percent of average 135 108 WIND RIVER BURROUGHS CREEK 8750 13.0 9.6 135 21.3 21.2 100 COLD SPRINGS 9630 -M 2.8 * 13.4 15.8 85 DEER PARK 9700 15.6 17.1 91 25.0 29.2 86 HOBBS PARK 10100 16.8 16.2 104 20.2 19.3 105 LITTLE WARM 9370 5.1 6.8 75 17.6 18.7 94 SOUTH PASS 9040 11.3 12.6 90 21.8 24.8 88 ST. LAWRENCE ALT 8620 .2 2.9 7 11.9 14.0 85 TOGWOTEE PASS 9580 30.9 26.8 115 35.3 31.2 113 TOWNSEND CREEK 8700 3.9 5.0 78 16.3 17.5 93 ----- ----- Basin wide percent of average 100 95 BIGHORN BASIN BALD MTN. 9380 19.6 22.5 87 20.7 23.8 87 BEAR TRAP MEADOW 8200 1.1 .4 275 12.9 12.8 101 BLACKWATER 9780 30.2 28.8 105 29.9 27.0 111 BONE SPRINGS DIV 9350 19.3 15.5 125 23.7 20.6 115 EVENING STAR 9200 29.8 31.8 94 40.4 32.4 125 GRAVE SPRINGS 8550 10.4 6.2 168 14.6 14.9 98 KIRWIN 9550 10.7 10.4 103 17.9 16.1 111 MARQUETTE 8760 8.4 8.3 101 14.9 16.2 92 MIDDLE POWDER 7760 13.0 9.6 135 14.3 17.8 80 OWL CREEK 8975 .1 1.9 5 9.3 9.8 95 POWDER RIVER PASS 9480 11.0 7.1 155 19.1 18.0 106 SHELL CREEK 9580 18.7 15.8 118 20.9 19.0 110 SYLVAN LAKE 8420 22.1 19.3 115 32.1 27.0 119 SYLVAN ROAD 7120 .0 2.0 0 24.3 22.1 110 TIMBER CREEK 7950 1.2 1.9 63 12.5 12.8 98 YOUNTS PEAK 8350 14.8 14.3 103 20.2 20.6 98 ----- ----- Basin wide percent of average 107 105 SHOSHONE RIVER BLACKWATER 9780 30.2 28.8 105 29.9 27.0 111 EVENING STAR 9200 29.8 31.8 94 40.4 32.4 125 KIRWIN 9550 10.7 10.4 103 17.9 16.1 111 MARQUETTE 8760 8.4 8.3 101 14.9 16.2 92 SYLVAN LAKE 8420 22.1 19.3 115 32.1 27.0 119 SYLVAN ROAD 7120 .0 2.0 0 24.3 22.1 110 YOUNTS PEAK 8350 14.8 14.3 103 20.2 20.6 98 ----- ----- Basin wide percent of average 101 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 1.1 .4 275 12.9 12.8 101 BIG GOOSE 7990 9.9 8.4 118 18.2 15.1 121 BONE SPRINGS DIV 9350 19.3 15.5 125 23.7 20.6 115 BURGESS JUNCTION 7880 15.8 8.9 178 20.4 17.3 118 CLOUD PEAK RESERVOIR 9860 17.0 14.2 120 22.1 19.8 112 DOME LAKE 8880 11.5 9.3 124 21.3 19.1 112 GRAVE SPRINGS 8550 10.4 6.2 168 14.6 14.9 98 HANSEN SAWMILL 8360 .6 1.7 35 13.2 12.7 104 MIDDLE POWDER 7760 13.0 9.6 135 14.3 17.8 80 POWDER RIVER PASS 9480 11.0 7.1 155 19.1 18.0 106 SUCKER CREEK 8880 17.4 9.1 191 24.5 19.9 123 TIE CREEK 6870 2.9 1.0 290 17.4 15.7 111 ----- ----- Basin wide percent of average 142 109 BELLE FOURCHE BLIND PARK 6890 -M .0 * 16.6 16.3 102 COLE CANYON 5910 .0 .4 0 14.7 11.5 128 NORTH RAPID CREEK 6130 -M .3 * 16.7 12.9 129 ----- ----- Basin wide percent of average 0* 118 UPPER N. PLATTE RIVER COLUMBINE 9160 19.8 10.9 182 35.0 31.0 113 DIVIDE PEAK 8880 19.2 11.0 175 29.2 26.2 111 ELK RIVER 8700 14.5 6.0 242 28.8 24.8 116 JOE WRIGHT 10120 29.1 23.1 126 36.8 32.9 112 NORTH FRENCH CREEK 10130 34.5 32.2 107 37.4 32.5 115 OLD BATTLE 10000 40.3 34.3 117 48.1 42.6 113 SAGE CREEK BASIN 7850 4.5 6.4 70 20.5 15.2 135 SOUTH BRUSH CREEK 8440 2.8 5.5 51 21.8 22.3 98 TOWER 10500 50.6 50.7 100 51.1 48.2 106 WEBBER SPRINGS 9250 23.4 16.0 146 38.0 33.3 114 WILLOW CREEK PASS 9540 20.9 9.9 211 21.6 17.4 124 ----- ----- Basin wide percent of average 126 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 19.3 21.3 91 28.3 29.6 96 CASPER MTN. 7900 14.7 10.2 144 21.4 22.3 96 DEADMAN HILL 10220 22.1 17.2 128 26.1 23.2 112 DEER PARK 9700 15.6 17.1 91 25.0 29.2 86 LAPRELE CREEK 8375 1.3 2.9 45 16.6 18.6 89 RENO HILL 8400 16.8 8.4 200 26.3 23.0 114 ROACH 9700 20.3 12.0 169 28.8 24.8 116 SAND LAKE 10050 35.2 34.5 102 37.9 32.3 117 SOUTH PASS 9040 11.3 12.6 90 21.8 24.8 88 WINDY PEAK 7900 .9 1.2 75 14.3 15.6 92 ----- ----- Basin wide percent of average 115 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 20.7 20.0 103 DIVIDE PEAK 8880 19.2 11.0 175 29.2 26.2 111 OLD BATTLE 10000 40.3 34.3 117 48.1 42.6 113 SANDSTONE RS 8150 7.9 2.8 282 26.0 23.6 110 WHISKEY PARK 8950 35.3 24.8 142 43.6 36.4 120 ----- ----- Basin wide percent of average 141 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 5.7 7.8 73 15.9 17.5 91 BLIND BULL SUM 8650 26.3 24.0 110 20.7 26.9 77 EAST RIM DIVIDE 7930 .6 8.0 8 12.9 15.1 85 ELKHART PARK G.S. 9400 6.6 8.5 78 14.1 17.7 80 GROS VENTRE SUMMIT 8750 8.6 8.9 97 16.8 16.6 101 GUNSIGHT PASS 9820 9.7 -M * 18.0 -M * KENDALL R.S. 7740 .1 2.1 5 15.9 17.7 90 LOOMIS PARK 8240 5.7 8.5 67 20.5 21.4 96 NEW FORK LAKE 8340 .2 2.7 7 12.0 14.8 81 SNIDER BASIN 8060 3.4 6.3 54 16.1 19.6 82 SPRING CREEK DIVIDE 9000 20.2 23.3 87 27.5 31.9 86 TRIPLE PEAK 8500 17.7 15.2 116 33.6 30.6 110 ----- ----- Basin wide percent of average 82 90 LOWER GREEN RIVER HAMS FORK 7840 .1 .0 12.9 16.1 80 HEWINTA 9519 3.2 3.5 91 20.3 19.3 105 HICKERSON PARK 9145 .0 1.4 0 11.4 11.6 98 HOLE-IN-ROCK 9150 .0 1.2 0 12.0 11.2 107 INDIAN CREEK 9425 -M 22.4 * -M 31.3 * KELLEY R.S. 8180 8.4 7.8 108 21.3 25.1 85 STEEL CREEK PARK 10200 19.4 17.4 111 22.6 21.9 103 ----- ----- Basin wide percent of average 99 96 UPPER BEAR RIVER BUG LAKE 7950 12.1 9.2 132 20.2 24.0 84 HAYDEN FORK 9212 3.9 6.1 64 27.6 27.1 102 KELLEY R.S. 8180 8.4 7.8 108 21.3 25.1 85 LILY LAKE 9156 5.3 5.3 100 21.5 22.8 94 MONTE CRISTO 8960 22.0 21.1 104 30.5 32.6 94 SALT RIVER SUMMIT 7760 5.2 3.4 153 18.8 23.1 81 TRIAL LAKE 9992 17.3 21.9 79 28.8 31.7 91 ----- ----- Basin wide percent of average 99 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.