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 FRIDAY: MAY 15 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 4.2 7.0 60 24.3 25.5 95 COTTONWOOD CREEK 7670 22.0 14.4 153 38.6 33.7 115 GRAND TARGHEE 9260 53.3 -M * 42.5 -M * GRANITE CREEK 6770 6.8 8.2 83 25.5 23.5 109 GRASSY LAKE 7265 25.9 27.1 96 42.8 42.7 100 GROS VENTRE SUMMIT 8750 11.3 10.2 111 19.4 16.3 119 GUNSIGHT PASS 9820 18.0 -M * 20.9 -M * LEWIS LAKE DIVIDE 7850 36.0 29.5 122 42.2 43.3 97 PHILLIPS BENCH 8200 27.8 24.6 113 36.1 34.7 104 SALT RIVER SUMMIT 7760 8.0 5.3 151 20.4 22.7 90 SNAKE RIVER STATION 6920 6.5 6.2 105 29.0 26.8 108 SPRING CREEK DIVIDE 9000 30.8 25.1 123 32.7 31.5 104 THUMB DIVIDE 7980 17.0 10.1 168 27.5 23.3 118 TOGWOTEE PASS 9580 33.1 27.5 120 36.5 30.7 119 TWO OCEAN PLATEAU 9240 48.8 30.8 158 37.8 34.0 111 WILLOW CREEK 8380 31.8 25.8 123 48.5 40.0 121 ----- ----- Basin wide percent of average 123 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.6 25.6 112 27.3 25.1 109 BLACK BEAR 8170 43.0 37.0 116 45.3 47.9 95 CANYON 7870 13.8 7.4 186 20.3 18.9 107 FISHER CREEK 9100 45.3 36.8 123 44.8 44.0 102 MADISON PLATEAU 7750 24.4 20.1 121 32.2 32.0 101 NORTHEAST ENTRANCE 7350 .4 3.8 11 17.9 15.9 113 PARKER PEAK 9400 32.8 24.1 136 24.5 21.1 116 SYLVAN LAKE 8420 22.9 20.8 110 30.7 26.5 116 THUMB DIVIDE 7980 17.0 10.1 168 27.5 23.3 118 TWO OCEAN PLATEAU 9240 48.8 30.8 158 37.8 34.0 111 WHISKEY CREEK 6800 16.3 10.3 158 26.7 25.5 105 WHITE MILL 8700 31.3 24.9 126 31.6 33.0 96 WOLVERINE 7650 3.8 3.5 109 17.0 16.6 102 ----- ----- Basin wide percent of average 129 105 WIND RIVER BURROUGHS CREEK 8750 17.8 10.6 168 21.8 20.8 105 COLD SPRINGS 9630 5.0 3.5 143 15.7 15.4 102 DEER PARK 9700 13.7 17.3 79 23.2 28.7 81 HOBBS PARK 10100 17.2 16.9 102 20.9 18.8 111 LITTLE WARM 9370 11.0 8.0 138 19.8 18.3 108 SOUTH PASS 9040 12.0 14.4 83 20.1 24.4 82 ST. LAWRENCE ALT 8620 -M 4.0 * -M 13.6 * TOGWOTEE PASS 9580 33.1 27.5 120 36.5 30.7 119 TOWNSEND CREEK 8700 6.9 5.9 117 17.3 17.1 101 ----- ----- Basin wide percent of average 112 101 BIGHORN BASIN BALD MTN. 9380 22.2 23.2 96 19.8 23.2 85 BEAR TRAP MEADOW 8200 .3 .9 33 12.3 12.4 99 BLACKWATER 9780 33.4 28.9 116 30.8 26.5 116 BONE SPRINGS DIV 9350 19.0 16.5 115 18.8 20.1 94 EVENING STAR 9200 34.7 32.6 106 39.6 31.8 125 GRAVE SPRINGS 8550 6.9 8.4 82 12.5 14.6 86 KIRWIN 9550 14.6 11.3 129 19.8 15.7 126 MARQUETTE 8760 7.4 9.1 81 13.1 15.6 84 MIDDLE POWDER 7760 9.7 11.5 84 13.1 17.4 75 OWL CREEK 8975 .1 2.5 4 10.3 9.4 110 POWDER RIVER PASS 9480 12.3 8.4 146 19.3 17.5 110 SHELL CREEK 9580 19.4 16.5 118 20.1 18.5 109 SYLVAN LAKE 8420 22.9 20.8 110 30.7 26.5 116 SYLVAN ROAD 7120 .3 3.1 10 25.5 21.8 117 TIMBER CREEK 7950 .5 2.3 22 12.1 12.2 99 YOUNTS PEAK 8350 20.2 15.8 128 20.8 20.2 103 ----- ----- Basin wide percent of average 106 105 SHOSHONE RIVER BLACKWATER 9780 33.4 28.9 116 30.8 26.5 116 EVENING STAR 9200 34.7 32.6 106 39.6 31.8 125 KIRWIN 9550 14.6 11.3 129 19.8 15.7 126 MARQUETTE 8760 7.4 9.1 81 13.1 15.6 84 SYLVAN LAKE 8420 22.9 20.8 110 30.7 26.5 116 SYLVAN ROAD 7120 .3 3.1 10 25.5 21.8 117 YOUNTS PEAK 8350 20.2 15.8 128 20.8 20.2 103 ----- ----- Basin wide percent of average 110 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 .3 .9 33 12.3 12.4 99 BIG GOOSE 7990 9.4 9.3 101 16.5 14.7 112 BONE SPRINGS DIV 9350 19.0 16.5 115 18.8 20.1 94 BURGESS JUNCTION 7880 11.9 10.5 113 16.0 16.9 95 CLOUD PEAK RESERVOIR 9860 19.2 15.0 128 21.6 19.2 113 DOME LAKE 8880 10.4 10.7 97 19.7 18.6 106 GRAVE SPRINGS 8550 6.9 8.4 82 12.5 14.6 86 HANSEN SAWMILL 8360 .0 2.4 0 13.1 12.3 107 MIDDLE POWDER 7760 9.7 11.5 84 13.1 17.4 75 POWDER RIVER PASS 9480 12.3 8.4 146 19.3 17.5 110 SUCKER CREEK 8880 14.8 10.5 141 21.5 19.4 111 TIE CREEK 6870 .1 1.5 7 17.7 15.3 116 ----- ----- Basin wide percent of average 108 102 BELLE FOURCHE BLIND PARK 6890 -M .2 * 18.1 15.8 115 COLE CANYON 5910 .1 .9 11 15.2 11.1 137 NORTH RAPID CREEK 6130 .0 .7 0 17.4 12.6 138 ----- ----- Basin wide percent of average 6 128 UPPER N. PLATTE RIVER COLUMBINE 9160 6.0 13.8 43 33.3 30.6 109 DIVIDE PEAK 8880 18.4 13.3 138 33.5 25.8 130 ELK RIVER 8700 .2 8.1 2 26.0 24.4 107 JOE WRIGHT 10120 23.5 24.0 98 35.0 32.3 108 NORTH FRENCH CREEK 10130 37.3 33.4 112 39.7 31.9 124 OLD BATTLE 10000 38.9 35.8 109 47.3 42.0 113 SAGE CREEK BASIN 7850 .0 7.7 0 19.5 15.0 130 SOUTH BRUSH CREEK 8440 .2 6.9 3 22.8 21.8 105 TOWER 10500 48.4 51.7 94 50.9 47.6 107 WEBBER SPRINGS 9250 17.1 18.8 91 35.8 32.9 109 WILLOW CREEK PASS 9540 8.8 11.6 76 16.1 17.0 95 ----- ----- Basin wide percent of average 88 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 21.4 23.7 90 28.3 29.0 98 CASPER MTN. 7900 9.5 12.2 78 17.5 21.6 81 DEADMAN HILL 10220 19.2 18.3 105 23.8 22.7 105 DEER PARK 9700 13.7 17.3 79 23.2 28.7 81 LAPRELE CREEK 8375 3.0 3.8 79 17.0 18.1 94 RENO HILL 8400 10.8 10.1 107 21.5 22.4 96 ROACH 9700 12.1 13.9 87 24.3 24.3 100 SAND LAKE 10050 35.0 35.8 98 36.9 31.7 116 SOUTH PASS 9040 12.0 14.4 83 20.1 24.4 82 WINDY PEAK 7900 1.8 1.9 95 15.5 15.1 103 ----- ----- Basin wide percent of average 91 96 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .9 0 23.0 19.7 117 DIVIDE PEAK 8880 18.4 13.3 138 33.5 25.8 130 OLD BATTLE 10000 38.9 35.8 109 47.3 42.0 113 SANDSTONE RS 8150 .0 4.1 0 25.4 23.3 109 WHISKEY PARK 8950 28.2 27.0 104 40.8 35.9 114 ----- ----- Basin wide percent of average 105 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.2 9.4 98 16.8 17.1 98 BLIND BULL SUM 8650 31.8 25.2 126 25.6 26.5 97 EAST RIM DIVIDE 7930 .0 9.6 0 14.7 14.8 99 ELKHART PARK G.S. 9400 11.9 9.7 123 18.9 17.3 109 GROS VENTRE SUMMIT 8750 11.3 10.2 111 19.4 16.3 119 GUNSIGHT PASS 9820 18.0 -M * 20.9 -M * KENDALL R.S. 7740 .2 4.2 5 17.4 17.4 100 LOOMIS PARK 8240 8.1 10.1 80 22.4 21.1 106 NEW FORK LAKE 8340 3.5 4.2 83 14.3 14.5 99 SNIDER BASIN 8060 6.7 8.1 83 18.2 19.4 94 SPRING CREEK DIVIDE 9000 30.8 25.1 123 32.7 31.5 104 TRIPLE PEAK 8500 20.0 17.7 113 33.7 30.2 112 ----- ----- Basin wide percent of average 100 104 LOWER GREEN RIVER HAMS FORK 7840 .2 1.5 13 15.9 15.8 101 HEWINTA 9519 .0 4.8 0 17.3 19.0 91 HICKERSON PARK 9145 .0 2.3 0 13.4 11.3 119 HOLE-IN-ROCK 9150 .0 1.9 0 12.8 10.8 119 INDIAN CREEK 9425 -M 24.2 * 27.5 30.9 89 KELLEY R.S. 8180 10.1 9.5 106 22.2 24.8 90 STEEL CREEK PARK 10200 -M 18.3 * 21.0 21.5 98 ----- ----- Basin wide percent of average 51 97 UPPER BEAR RIVER BUG LAKE 7950 10.3 11.4 90 22.1 23.7 93 HAYDEN FORK 9212 .2 7.8 3 27.4 26.7 103 KELLEY R.S. 8180 10.1 9.5 106 22.2 24.8 90 LILY LAKE 9156 .1 6.7 1 21.6 22.5 96 MONTE CRISTO 8960 19.8 23.2 85 32.0 32.1 100 SALT RIVER SUMMIT 7760 8.0 5.3 151 20.4 22.7 90 TRIAL LAKE 9992 18.1 23.6 77 29.7 31.2 95 ----- ----- Basin wide percent of average 76 95 ----------------------------------------------------------------------------- -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.