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 SATURDAY: MAY 23 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 .0 3.3 0 24.5 26.2 94 COTTONWOOD CREEK 7670 11.8 10.4 113 38.4 34.7 111 GRAND TARGHEE 9260 42.8 -M * 42.5 -M * GRANITE CREEK 6770 .2 5.0 4 26.8 24.1 111 GRASSY LAKE 7265 14.7 22.0 67 43.0 43.8 98 GROS VENTRE SUMMIT 8750 2.5 7.5 33 19.1 16.9 113 GUNSIGHT PASS 9820 12.7 -M * 20.9 -M * LEWIS LAKE DIVIDE 7850 24.7 24.9 99 42.2 44.3 95 PHILLIPS BENCH 8200 19.1 20.2 95 36.3 35.6 102 SALT RIVER SUMMIT 7760 .2 1.5 13 20.4 23.4 87 SNAKE RIVER STATION 6920 .0 2.1 0 28.8 27.5 105 SPRING CREEK DIVIDE 9000 22.4 21.2 106 32.8 32.3 102 THUMB DIVIDE 7980 5.1 6.6 77 27.6 24.0 115 TOGWOTEE PASS 9580 27.8 25.8 108 36.5 31.6 116 TWO OCEAN PLATEAU 9240 41.6 29.0 143 37.8 35.1 108 WILLOW CREEK 8380 20.6 21.2 97 48.5 41.2 118 ----- ----- Basin wide percent of average 95 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.3 24.0 101 27.4 26.0 105 BLACK BEAR 8170 35.0 33.3 105 45.2 49.0 92 CANYON 7870 5.3 4.3 123 20.1 19.6 103 FISHER CREEK 9100 39.6 34.0 116 45.2 45.2 100 MADISON PLATEAU 7750 17.1 15.6 110 32.1 33.0 97 NORTHEAST ENTRANCE 7350 .1 1.3 8 18.0 16.7 108 PARKER PEAK 9400 23.2 22.5 103 24.4 22.0 111 SYLVAN LAKE 8420 -M 17.0 * 30.4 27.6 110 THUMB DIVIDE 7980 5.1 6.6 77 27.6 24.0 115 TWO OCEAN PLATEAU 9240 41.6 29.0 143 37.8 35.1 108 WHISKEY CREEK 6800 9.1 6.1 149 26.4 26.3 100 WHITE MILL 8700 25.0 22.5 111 31.5 34.0 93 WOLVERINE 7650 .0 1.1 0 16.9 17.4 97 ----- ----- Basin wide percent of average 113 102 WIND RIVER BURROUGHS CREEK 8750 11.1 7.6 146 21.7 21.6 100 COLD SPRINGS 9630 .0 1.6 0 15.7 16.2 97 DEER PARK 9700 7.7 15.1 51 23.0 29.8 77 HOBBS PARK 10100 11.3 14.6 77 21.3 19.9 107 LITTLE WARM 9370 2.1 4.9 43 19.7 19.1 103 SOUTH PASS 9040 3.2 10.3 31 20.0 25.2 79 ST. LAWRENCE ALT 8620 .1 1.5 7 14.6 14.3 102 TOGWOTEE PASS 9580 27.8 25.8 108 36.5 31.6 116 TOWNSEND CREEK 8700 .0 3.5 0 17.9 17.9 100 ----- ----- Basin wide percent of average 75 97 BIGHORN BASIN BALD MTN. 9380 17.5 21.2 83 20.0 24.3 82 BEAR TRAP MEADOW 8200 .1 .0 12.4 13.2 94 BLACKWATER 9780 29.1 28.3 103 30.9 27.5 112 BONE SPRINGS DIV 9350 12.4 13.4 93 18.9 21.1 90 EVENING STAR 9200 27.4 30.6 90 40.0 33.0 121 GRAVE SPRINGS 8550 .3 3.6 8 12.3 15.3 80 KIRWIN 9550 7.2 9.2 78 19.9 16.5 121 MARQUETTE 8760 .1 7.0 1 13.4 16.7 80 MIDDLE POWDER 7760 2.1 7.2 29 13.3 18.2 73 OWL CREEK 8975 .1 1.2 8 10.3 10.2 101 POWDER RIVER PASS 9480 5.7 5.4 106 19.4 18.5 105 SHELL CREEK 9580 14.9 14.3 104 20.3 19.4 105 SYLVAN LAKE 8420 -M 17.0 * 30.4 27.6 110 SYLVAN ROAD 7120 .2 .7 29 25.3 22.5 112 TIMBER CREEK 7950 .0 1.3 0 12.1 13.3 91 YOUNTS PEAK 8350 14.0 12.4 113 20.8 21.0 99 ----- ----- Basin wide percent of average 84 100 SHOSHONE RIVER BLACKWATER 9780 29.1 28.3 103 30.9 27.5 112 EVENING STAR 9200 27.4 30.6 90 40.0 33.0 121 KIRWIN 9550 7.2 9.2 78 19.9 16.5 121 MARQUETTE 8760 .1 7.0 1 13.4 16.7 80 SYLVAN LAKE 8420 -M 17.0 * 30.4 27.6 110 SYLVAN ROAD 7120 .2 .7 29 25.3 22.5 112 YOUNTS PEAK 8350 14.0 12.4 113 20.8 21.0 99 ----- ----- Basin wide percent of average 88 110 POWDER-TONGUE BEAR TRAP MEADOW 8200 .1 .0 12.4 13.2 94 BIG GOOSE 7990 2.7 7.3 37 16.5 15.5 106 BONE SPRINGS DIV 9350 12.4 13.4 93 18.9 21.1 90 BURGESS JUNCTION 7880 6.2 7.2 86 16.0 17.7 90 CLOUD PEAK RESERVOIR 9860 13.5 12.3 110 22.0 20.4 108 DOME LAKE 8880 2.8 7.2 39 19.7 19.6 101 GRAVE SPRINGS 8550 .3 3.6 8 12.3 15.3 80 HANSEN SAWMILL 8360 .0 .9 0 13.2 13.1 101 MIDDLE POWDER 7760 2.1 7.2 29 13.3 18.2 73 POWDER RIVER PASS 9480 5.7 5.4 106 19.4 18.5 105 SUCKER CREEK 8880 8.7 7.6 114 21.5 20.4 105 TIE CREEK 6870 .0 .2 0 17.7 16.2 109 ----- ----- Basin wide percent of average 75 97 BELLE FOURCHE BLIND PARK 6890 -M .0 * 18.2 16.8 108 COLE CANYON 5910 .1 .0 15.2 11.9 128 NORTH RAPID CREEK 6130 -M .1 * 17.8 13.2 135 ----- ----- Basin wide percent of average * 122 UPPER N. PLATTE RIVER COLUMBINE 9160 .1 8.0 1 33.2 31.4 106 DIVIDE PEAK 8880 4.5 8.7 52 33.5 26.6 126 ELK RIVER 8700 .1 4.2 2 26.0 25.2 103 JOE WRIGHT 10120 -M 21.8 * -M 33.5 * NORTH FRENCH CREEK 10130 27.9 30.4 92 39.6 33.0 120 OLD BATTLE 10000 33.3 32.3 103 47.4 43.1 110 SAGE CREEK BASIN 7850 .0 5.0 0 19.6 15.4 127 SOUTH BRUSH CREEK 8440 .0 4.2 0 22.7 22.7 100 TOWER 10500 38.3 49.2 78 51.0 48.7 105 WEBBER SPRINGS 9250 8.5 13.2 64 35.9 33.7 107 WILLOW CREEK PASS 9540 2.0 7.9 25 16.5 17.8 93 ----- ----- Basin wide percent of average 70 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 12.9 18.7 69 28.5 30.0 95 CASPER MTN. 7900 .2 8.2 2 17.3 22.8 76 DEADMAN HILL 10220 13.7 15.8 87 23.8 23.7 100 DEER PARK 9700 7.7 15.1 51 23.0 29.8 77 LAPRELE CREEK 8375 .0 2.1 0 16.9 19.1 88 RENO HILL 8400 2.5 6.7 37 21.4 23.5 91 ROACH 9700 3.9 10.2 38 24.3 25.3 96 SAND LAKE 10050 29.1 32.7 89 37.2 32.9 113 SOUTH PASS 9040 3.2 10.3 31 20.0 25.2 79 WINDY PEAK 7900 .6 .8 75 15.8 16.0 99 ----- ----- Basin wide percent of average 61 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 .0 100 22.9 20.3 113 DIVIDE PEAK 8880 4.5 8.7 52 33.5 26.6 126 OLD BATTLE 10000 33.3 32.3 103 47.4 43.1 110 SANDSTONE RS 8150 .1 1.7 6 25.6 24.0 107 WHISKEY PARK 8950 -M 22.1 * -M 36.8 * ----- ----- Basin wide percent of average 89 114 UPPER GREEN RIVER BIG SANDY OPENING 9080 .2 6.1 3 17.0 17.8 96 BLIND BULL SUM 8650 28.7 22.5 128 25.6 27.2 94 EAST RIM DIVIDE 7930 .0 6.3 0 14.8 15.4 96 ELKHART PARK G.S. 9400 4.8 7.1 68 18.9 18.1 104 GROS VENTRE SUMMIT 8750 2.5 7.5 33 19.1 16.9 113 GUNSIGHT PASS 9820 12.7 -M * 20.9 -M * KENDALL R.S. 7740 .1 .0 17.4 18.0 97 LOOMIS PARK 8240 .1 6.8 1 22.4 21.7 103 NEW FORK LAKE 8340 .0 1.2 0 15.1 15.1 100 SNIDER BASIN 8060 -M 4.5 * 18.1 19.9 91 SPRING CREEK DIVIDE 9000 22.4 21.2 106 32.8 32.3 102 TRIPLE PEAK 8500 10.0 12.4 81 33.8 31.0 109 ----- ----- Basin wide percent of average 75 101 LOWER GREEN RIVER HAMS FORK 7840 .1 .0 16.0 16.3 98 HEWINTA 9519 .0 2.3 0 17.3 19.6 88 HICKERSON PARK 9145 .0 .7 0 13.5 11.9 113 HOLE-IN-ROCK 9150 .0 .6 0 12.8 11.5 111 INDIAN CREEK 9425 -M 20.4 * 27.5 31.6 87 KELLEY R.S. 8180 .7 6.1 11 22.3 25.4 88 STEEL CREEK PARK 10200 8.6 16.1 53 21.0 22.3 94 ----- ----- Basin wide percent of average 36 94 UPPER BEAR RIVER BUG LAKE 7950 .2 7.0 3 22.1 24.3 91 HAYDEN FORK 9212 .0 4.5 0 27.3 27.5 99 KELLEY R.S. 8180 .7 6.1 11 22.3 25.4 88 LILY LAKE 9156 .0 4.0 0 21.6 23.2 93 MONTE CRISTO 8960 10.0 18.8 53 31.9 33.1 96 SALT RIVER SUMMIT 7760 .2 1.5 13 20.4 23.4 87 TRIAL LAKE 9992 9.1 20.1 45 29.9 32.2 93 ----- ----- Basin wide percent of average 33 93 ----------------------------------------------------------------------------- -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.