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 19 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.2 4.7 196 31.2 26.0 120 COTTONWOOD CREEK 7670 16.6 12.0 138 29.8 34.4 87 GRAND TARGHEE 9260 58.2 -M * 42.0 -M * GRANITE CREEK 6770 8.7 6.3 138 25.5 23.9 107 GRASSY LAKE 7265 28.9 24.0 120 49.9 43.4 115 GROS VENTRE SUMMIT 8750 7.4 8.6 86 16.8 16.7 101 GUNSIGHT PASS 9820 8.7 -M * 18.0 -M * LEWIS LAKE DIVIDE 7850 31.3 26.8 117 42.4 43.9 97 PHILLIPS BENCH 8200 25.3 22.0 115 39.4 35.2 112 SALT RIVER SUMMIT 7760 3.6 3.0 120 18.9 23.1 82 SNAKE RIVER STATION 6920 6.3 3.7 170 31.7 27.2 117 SPRING CREEK DIVIDE 9000 19.0 22.8 83 27.5 32.0 86 THUMB DIVIDE 7980 9.3 8.0 116 24.2 23.7 102 TOGWOTEE PASS 9580 30.1 26.6 113 35.3 31.3 113 TWO OCEAN PLATEAU 9240 44.9 29.8 151 -M 34.7 * WILLOW CREEK 8380 24.4 23.1 106 46.3 40.8 113 ----- ----- Basin wide percent of average 120 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.9 24.8 112 29.1 25.6 114 BLACK BEAR 8170 45.0 34.9 129 49.5 48.6 102 CANYON 7870 12.2 5.6 218 24.5 19.3 127 FISHER CREEK 9100 46.2 35.4 131 45.4 44.8 101 MADISON PLATEAU 7750 27.2 17.5 155 37.9 32.6 116 NORTHEAST ENTRANCE 7350 .2 1.9 11 16.5 16.4 101 PARKER PEAK 9400 29.9 23.4 128 -M 21.7 * SYLVAN LAKE 8420 21.9 18.8 116 32.1 27.1 118 THUMB DIVIDE 7980 9.3 8.0 116 24.2 23.7 102 TWO OCEAN PLATEAU 9240 44.9 29.8 151 -M 34.7 * WHISKEY CREEK 6800 15.5 7.7 201 29.2 26.0 112 WHITE MILL 8700 28.5 23.7 120 32.4 33.6 96 WOLVERINE 7650 .3 1.8 17 17.6 17.1 103 ----- ----- Basin wide percent of average 132 107 WIND RIVER BURROUGHS CREEK 8750 12.1 9.3 130 21.3 21.3 100 COLD SPRINGS 9630 .0 2.6 0 13.5 15.9 85 DEER PARK 9700 14.9 16.6 90 25.1 29.4 85 HOBBS PARK 10100 16.2 15.8 103 20.4 19.5 105 LITTLE WARM 9370 3.7 6.3 59 17.7 18.8 94 SOUTH PASS 9040 10.1 12.1 83 21.7 24.9 87 ST. LAWRENCE ALT 8620 .3 2.6 12 11.8 14.1 84 TOGWOTEE PASS 9580 30.1 26.6 113 35.3 31.3 113 TOWNSEND CREEK 8700 2.8 4.7 60 16.4 17.6 93 ----- ----- Basin wide percent of average 93 95 BIGHORN BASIN BALD MTN. 9380 18.7 22.3 84 20.7 23.9 87 BEAR TRAP MEADOW 8200 .0 .2 0 13.0 12.9 101 BLACKWATER 9780 29.4 28.8 102 30.0 27.1 111 BONE SPRINGS DIV 9350 18.1 15.1 120 23.7 20.8 114 EVENING STAR 9200 28.3 31.7 89 40.4 32.5 124 GRAVE SPRINGS 8550 9.6 5.7 168 14.6 15.0 97 KIRWIN 9550 9.6 10.2 94 17.9 16.2 110 MARQUETTE 8760 6.9 8.1 85 14.9 16.3 91 MIDDLE POWDER 7760 11.7 9.1 129 14.4 17.9 80 OWL CREEK 8975 .1 1.8 6 9.3 9.9 94 POWDER RIVER PASS 9480 10.0 6.8 147 19.1 18.1 106 SHELL CREEK 9580 18.2 15.4 118 20.9 19.1 109 SYLVAN LAKE 8420 21.9 18.8 116 32.1 27.1 118 SYLVAN ROAD 7120 .0 1.7 0 24.3 22.2 109 TIMBER CREEK 7950 .4 1.8 22 12.4 12.9 96 YOUNTS PEAK 8350 14.0 13.9 101 20.2 20.7 98 ----- ----- Basin wide percent of average 103 105 SHOSHONE RIVER BLACKWATER 9780 29.4 28.8 102 30.0 27.1 111 EVENING STAR 9200 28.3 31.7 89 40.4 32.5 124 KIRWIN 9550 9.6 10.2 94 17.9 16.2 110 MARQUETTE 8760 6.9 8.1 85 14.9 16.3 91 SYLVAN LAKE 8420 21.9 18.8 116 32.1 27.1 118 SYLVAN ROAD 7120 .0 1.7 0 24.3 22.2 109 YOUNTS PEAK 8350 14.0 13.9 101 20.2 20.7 98 ----- ----- Basin wide percent of average 97 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 .0 .2 0 13.0 12.9 101 BIG GOOSE 7990 8.9 8.2 109 18.2 15.2 120 BONE SPRINGS DIV 9350 18.1 15.1 120 23.7 20.8 114 BURGESS JUNCTION 7880 15.0 8.6 174 20.4 17.4 117 CLOUD PEAK RESERVOIR 9860 16.7 13.9 120 22.2 20.0 111 DOME LAKE 8880 10.6 8.9 119 21.3 19.2 111 GRAVE SPRINGS 8550 9.6 5.7 168 14.6 15.0 97 HANSEN SAWMILL 8360 .0 1.4 0 13.2 12.8 103 MIDDLE POWDER 7760 11.7 9.1 129 14.4 17.9 80 POWDER RIVER PASS 9480 10.0 6.8 147 19.1 18.1 106 SUCKER CREEK 8880 16.5 8.8 187 24.5 20.0 123 TIE CREEK 6870 -M .7 * 17.4 15.8 110 ----- ----- Basin wide percent of average 135 108 BELLE FOURCHE BLIND PARK 6890 .0 .0 100 16.6 16.4 101 COLE CANYON 5910 .0 .3 0 14.7 11.6 127 NORTH RAPID CREEK 6130 -M .2 * 16.7 13.0 128 ----- ----- Basin wide percent of average 0 117 UPPER N. PLATTE RIVER COLUMBINE 9160 18.8 10.2 184 35.0 31.1 113 DIVIDE PEAK 8880 17.8 10.4 171 29.2 26.3 111 ELK RIVER 8700 12.6 5.5 229 28.9 24.9 116 JOE WRIGHT 10120 27.6 22.8 121 36.9 33.1 111 NORTH FRENCH CREEK 10130 33.2 31.8 104 37.4 32.6 115 OLD BATTLE 10000 39.3 33.8 116 48.1 42.7 113 SAGE CREEK BASIN 7850 2.9 6.0 48 20.6 15.3 135 SOUTH BRUSH CREEK 8440 1.2 5.1 24 21.8 22.4 97 TOWER 10500 50.2 50.4 100 51.1 48.3 106 WEBBER SPRINGS 9250 22.4 15.3 146 37.9 33.4 113 WILLOW CREEK PASS 9540 20.1 9.4 214 21.5 17.5 123 ----- ----- Basin wide percent of average 123 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.0 20.7 87 28.3 29.7 95 CASPER MTN. 7900 13.7 9.7 141 21.4 22.4 96 DEADMAN HILL 10220 21.8 16.8 130 26.1 23.3 112 DEER PARK 9700 14.9 16.6 90 25.1 29.4 85 LAPRELE CREEK 8375 .4 2.7 15 16.6 18.7 89 RENO HILL 8400 15.7 8.0 196 26.5 23.1 115 ROACH 9700 19.4 11.6 167 28.8 24.9 116 SAND LAKE 10050 34.4 34.1 101 37.9 32.5 117 SOUTH PASS 9040 10.1 12.1 83 21.7 24.9 87 WINDY PEAK 7900 .8 1.1 73 14.3 15.7 91 ----- ----- Basin wide percent of average 112 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 20.7 20.1 103 DIVIDE PEAK 8880 17.8 10.4 171 29.2 26.3 111 OLD BATTLE 10000 39.3 33.8 116 48.1 42.7 113 SANDSTONE RS 8150 6.2 2.5 248 26.0 23.7 110 WHISKEY PARK 8950 33.7 24.2 139 43.6 36.5 119 ----- ----- Basin wide percent of average 137 112 UPPER GREEN RIVER BIG SANDY OPENING 9080 4.7 7.4 64 15.9 17.5 91 BLIND BULL SUM 8650 26.2 23.6 111 20.7 27.0 77 EAST RIM DIVIDE 7930 .0 7.6 0 12.8 15.2 84 ELKHART PARK G.S. 9400 5.3 8.1 65 14.1 17.8 79 GROS VENTRE SUMMIT 8750 7.4 8.6 86 16.8 16.7 101 GUNSIGHT PASS 9820 8.7 -M * 18.0 -M * KENDALL R.S. 7740 .1 1.6 6 16.0 17.8 90 LOOMIS PARK 8240 4.3 8.1 53 20.5 21.5 95 NEW FORK LAKE 8340 .0 2.3 0 12.2 14.9 82 SNIDER BASIN 8060 2.4 5.9 41 16.2 19.7 82 SPRING CREEK DIVIDE 9000 19.0 22.8 83 27.5 32.0 86 TRIPLE PEAK 8500 16.6 14.5 114 33.7 30.7 110 ----- ----- Basin wide percent of average 78 89 LOWER GREEN RIVER HAMS FORK 7840 .0 .0 100 12.9 16.1 80 HEWINTA 9519 1.7 3.2 53 20.3 19.4 105 HICKERSON PARK 9145 .0 1.2 0 11.5 11.7 98 HOLE-IN-ROCK 9150 .0 1.0 0 12.0 11.2 107 INDIAN CREEK 9425 -M 21.9 * -M 31.4 * KELLEY R.S. 8180 7.1 7.4 96 21.3 25.2 85 STEEL CREEK PARK 10200 18.4 17.1 108 22.5 22.0 102 ----- ----- Basin wide percent of average 91 95 UPPER BEAR RIVER BUG LAKE 7950 10.8 8.6 126 20.5 24.1 85 HAYDEN FORK 9212 2.4 5.7 42 27.6 27.2 101 KELLEY R.S. 8180 7.1 7.4 96 21.3 25.2 85 LILY LAKE 9156 3.6 5.0 72 21.6 22.9 94 MONTE CRISTO 8960 20.7 20.5 101 30.5 32.7 93 SALT RIVER SUMMIT 7760 3.6 3.0 120 18.9 23.1 82 TRIAL LAKE 9992 15.8 21.5 73 28.8 31.8 91 ----- ----- Basin wide percent of average 89 90 ----------------------------------------------------------------------------- -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.