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 WEDNESDAY: APRIL 18 , 2012 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.7 16.2 78 25.2 23.2 109 BLACK BEAR 8170 42.4 41.0 103 45.7 43.8 104 BLIND BULL SUM 8650 24.1 28.9 83 17.8 24.1 74 COTTONWOOD CREEK 7670 15.7 23.3 67 25.6 30.2 85 EAST RIM DIVIDE 7930 3.6 14.0 26 12.0 13.1 92 GRAND TARGHEE 9260 38.6 -M * 31.7 -M * GRANITE CREEK 6770 -M 16.4 * -M 21.3 * GRASSY LAKE 7265 32.8 36.8 89 40.9 39.0 105 GROS VENTRE SUMMIT 8750 7.4 14.5 51 11.4 14.3 80 GUNSIGHT PASS 9820 11.7 -M * 15.3 -M * LEWIS LAKE DIVIDE 7850 32.8 36.6 90 37.4 39.8 94 PHILLIPS BENCH 8200 22.9 30.7 75 26.6 31.5 84 SALT RIVER SUMMIT 7760 6.5 13.9 47 11.5 20.5 56 SNAKE RIVER STATION 6920 11.6 16.8 69 26.3 24.3 108 SPRING CREEK DIVIDE 9000 23.1 28.7 80 23.3 28.8 81 THUMB DIVIDE 7980 15.0 18.2 82 19.9 20.7 96 TOGWOTEE PASS 9580 22.4 27.0 83 25.4 27.2 93 TWO OCEAN PLATEAU 9240 36.1 30.9 117 29.7 30.3 98 WILLOW CREEK 8380 20.7 31.9 65 33.5 35.4 95 YOUNTS PEAK 8350 15.8 18.2 87 16.6 17.7 94 ----- ----- Basin wide percent of average 81 92 MADISON-GALLATIN BLACK BEAR 8170 42.4 41.0 103 45.7 43.8 104 CANYON 7870 12.2 13.4 91 16.8 16.8 100 MADISON PLATEAU 7750 27.8 25.9 107 34.0 29.2 116 WEST YELLOWSTONE 6700 5.5 10.3 53 18.9 14.2 133 WHISKEY CREEK 6800 16.7 17.6 95 25.7 22.9 112 ----- ----- Basin wide percent of average 97 111 YELLOWSTONE BEARTOOTH LAKE 9360 27.0 25.5 106 26.2 22.1 119 BURNT MTN 5880 .0 4.8 0 13.8 18.0 77 CANYON 7870 12.2 13.4 91 16.8 16.8 100 COLE CREEK 7850 16.2 18.7 87 13.8 19.5 71 EVENING STAR 9200 31.1 32.3 96 34.5 28.0 123 FISHER CREEK 9100 38.6 37.2 104 38.2 39.7 96 NORTHEAST ENTRANCE 7350 5.6 10.1 55 14.6 13.9 105 PARKER PEAK 9400 26.6 23.6 113 25.1 18.1 139 SYLVAN LAKE 8420 17.9 24.2 74 26.8 23.1 116 THUMB DIVIDE 7980 15.0 18.2 82 19.9 20.7 96 TWO OCEAN PLATEAU 9240 36.1 30.9 117 29.7 30.3 98 WHITE MILL 8700 26.0 26.1 100 26.6 29.5 90 WOLVERINE 7650 3.4 10.4 33 14.0 14.1 99 ----- ----- Basin wide percent of average 93 102 WIND RIVER BURROUGHS CREEK 8750 13.8 15.0 92 14.6 18.0 81 CASTLE CREEK 8400 .0 -M * 8.9 -M * COLD SPRINGS 9630 .0 6.3 0 9.6 12.4 77 DEER PARK 9700 10.7 17.5 61 19.2 24.6 78 HOBBS PARK 10100 13.9 16.9 82 14.5 15.1 96 KIRWIN 9550 12.0 12.4 97 15.0 12.8 117 LITTLE WARM 9370 7.0 12.4 56 12.2 15.2 80 OWL CREEK 8975 .0 5.0 0 5.7 7.1 80 SOUTH PASS 9040 12.9 17.7 73 14.6 20.8 70 ST. LAWRENCE ALT 8620 .0 7.0 0 8.3 10.5 79 TOGWOTEE PASS 9580 22.4 27.0 83 25.4 27.2 93 TOWNSEND CREEK 8700 4.6 9.6 48 12.1 13.8 88 ----- ----- Basin wide percent of average 66 85 BIGHORN BASIN BALD MTN. 9380 22.6 22.1 102 17.0 19.5 87 BEAR TRAP MEADOW 8200 1.5 4.1 37 10.3 9.7 106 BONE SPRINGS DIV 9350 21.1 17.6 120 17.5 16.6 105 GRAVE SPRINGS 8550 6.8 10.7 64 12.0 11.7 103 KIRWIN 9550 12.0 12.4 97 15.0 12.8 117 MARQUETTE 8760 7.5 -M * 12.5 11.8 106 MIDDLE POWDER 7760 10.0 14.0 71 12.5 14.2 88 OWL CREEK 8975 .0 5.0 0 5.7 7.1 80 POWDER RIVER PASS 9480 9.4 11.8 80 17.1 14.2 120 SHELL CREEK 9580 19.9 16.2 123 17.8 15.2 117 TIMBER CREEK 7950 .0 5.5 0 9.6 8.9 108 ----- ----- Basin wide percent of average 87 104 SHOSHONE RIVER BLACKWATER 9780 26.1 27.1 96 26.1 23.0 113 EVENING STAR 9200 31.1 32.3 96 34.5 28.0 123 MARQUETTE 8760 7.5 -M * 12.5 11.8 106 SYLVAN ROAD 7120 1.2 11.5 10 19.5 19.3 101 YOUNTS PEAK 8350 15.8 18.2 87 16.6 17.7 94 ----- ----- Basin wide percent of average 83 109 POWDER RIVER BEAR TRAP MEADOW 8200 1.5 4.1 37 10.3 9.7 106 CLOUD PEAK RESERVOIR 9860 14.7 15.4 95 17.2 15.1 114 GRAVE SPRINGS 8550 6.8 10.7 64 12.0 11.7 103 HANSEN SAWMILL 8360 .7 5.8 12 9.7 9.6 101 MIDDLE POWDER 7760 10.0 14.0 71 12.5 14.2 88 POWDER RIVER PASS 9480 9.4 11.8 80 17.1 14.2 120 SOLDIER PARK 8720 5.8 -M * 11.6 -M * ----- ----- Basin wide percent of average 70 106 TONGUE RIVER BIG GOOSE 7990 8.0 12.5 64 16.1 11.0 146 BONE SPRINGS DIV 9350 21.1 17.6 120 17.5 16.6 105 BURGESS JUNCTION 7880 12.4 13.2 94 15.2 13.9 109 DOME LAKE 8880 13.1 13.8 95 16.8 15.1 111 LITTLE GOOSE 8870 7.6 -M * 18.4 -M * SUCKER CREEK 8880 11.4 13.4 85 17.1 15.6 110 TIE CREEK 6870 .7 5.4 13 14.9 11.8 126 ----- ----- Basin wide percent of average 88 116 BELLE FOURCHE COLE CANYON 5910 .0 7.0 0 9.3 7.9 118 ----- ----- Basin wide percent of average 0 118 CHEYENNE RIVER BASIN BLIND PARK 6890 .0 7.0 0 11.2 12.7 88 NORTH RAPID CREEK 6130 .0 8.5 0 9.5 9.8 97 ----- ----- Basin wide percent of average 0 92 UPPER N. PLATTE ARAPAHO RIDGE 10960 13.4 25.1 53 17.7 29.2 61 BLACKHALL MTN 9820 20.0 -M * 24.7 -M * COLUMBINE 9160 -M 24.3 * 20.4 27.6 74 DIVIDE PEAK 8880 6.7 20.9 32 20.1 22.8 88 JOE WRIGHT 10120 10.7 24.0 45 20.4 27.8 73 LAPRELE CREEK 8375 1.6 9.8 16 13.2 14.6 90 NORTH FRENCH CREEK 10130 16.4 33.1 50 21.0 27.4 77 NEVER SUMMER 10280 11.0 22.8 48 11.9 26.4 45 OLD BATTLE 10000 23.6 35.1 67 28.5 37.7 76 RAWAH 9020 .4 16.2 2 12.3 18.3 67 SAGE CREEK BASIN 7850 -M 12.1 * 11.2 13.2 85 SAND LAKE 10050 23.8 35.4 67 24.9 27.1 92 SOUTH BRUSH CREEK 8440 -M 13.1 * 12.2 18.5 66 TOWER 10500 27.6 50.2 55 32.6 42.4 77 WEBBER SPRINGS 9250 11.6 26.1 44 22.8 29.3 78 WILLOW CREEK PASS 9540 -M 13.9 * 10.1 14.4 70 ZIRKEL 9340 -M 25.0 * 25.4 28.4 89 ----- ----- Basin wide percent of average 49 75 SWEETWATER DEER PARK 9700 10.7 17.5 61 19.2 24.6 78 LARSEN CREEK 9000 5.9 -M * 15.3 -M * SOUTH PASS 9040 12.9 17.7 73 14.6 20.8 70 ----- ----- Basin wide percent of average 67 74 LOWER N. PLATTE CASPER MTN. 7900 15.0 17.1 88 19.6 17.2 114 LAPRELE CREEK 8375 1.6 9.8 16 13.2 14.6 90 RENO HILL 8400 13.6 16.0 85 20.1 17.8 113 WINDY PEAK 7900 .3 7.6 4 9.7 12.1 80 ----- ----- Basin wide percent of average 60 101 LARAMIE RIVER BROOKLYN LAKE 10240 13.4 27.0 50 20.3 24.9 82 CINNABAR PARK 9574 9.3 17.6 53 20.6 21.9 94 CROW CREEK 8330 .1 9.4 1 10.7 11.3 95 DEADMAN HILL 10220 16.7 18.7 89 17.1 19.2 89 RAWAH 9020 .4 16.2 2 12.3 18.3 67 ROACH 9700 10.8 18.4 59 17.7 20.8 85 ----- ----- Basin wide percent of average 47 85 S. PLATTE BLACK MOUNTAIN 8920 6.6 -M * 13.2 -M * CROW CREEK 8330 .1 9.4 1 10.7 11.3 95 DEADMAN HILL 10220 16.7 18.7 89 17.1 19.2 89 ----- ----- Basin wide percent of average 60 91 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .0 8.0 0 12.7 17.4 73 DIVIDE PEAK 8880 6.7 20.9 32 20.1 22.8 88 ELK RIVER 8700 -M 19.2 * 16.2 21.6 75 LITTLE SNAKE RIVER 8915 9.7 -M * 25.4 -M * OLD BATTLE 10000 23.6 35.1 67 28.5 37.7 76 SAGE CREEK BASIN 7850 -M 12.1 * 11.2 13.2 85 SANDSTONE RS 8150 -M 12.9 * 12.6 20.4 62 WHISKEY PARK 8950 14.3 30.6 47 25.1 31.5 80 ----- ----- Basin wide percent of average 47 77 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.3 15.2 88 15.0 14.7 102 BLIND BULL SUM 8650 24.1 28.9 83 17.8 24.1 74 EAST RIM DIVIDE 7930 3.6 14.0 26 12.0 13.1 92 ELKHART PARK G.S. 9400 13.7 14.0 98 16.0 14.8 108 GROS VENTRE SUMMIT 8750 7.4 14.5 51 11.4 14.3 80 GUNSIGHT PASS 9820 11.7 -M * 15.3 -M * KENDALL R.S. 7740 8.4 13.2 64 15.3 15.7 97 LOOMIS PARK 8240 8.1 16.8 48 17.2 18.9 91 NEW FORK LAKE 8340 6.8 11.0 62 11.5 12.5 92 POCKET CREEK 9360 10.3 -M * 13.3 -M * SNIDER BASIN 8060 8.3 14.7 56 13.3 17.7 75 SPRING CREEK DIVIDE 9000 23.1 28.7 80 23.3 28.8 81 TRIPLE PEAK 8500 15.1 25.9 58 25.7 27.1 95 ----- ----- Basin wide percent of average 67 88 LOWER GREEN RIVER BLACKS FORK JCT 8870 .0 -M * 11.9 -M * BUCK PASTURE 9700 .1 -M * 5.0 -M * EF BLACKS FORK GS 9308 .0 -M * 10.3 -M * HAMS FORK 7840 1.3 9.4 14 10.3 13.6 76 HEWINTA 9519 4.4 12.0 37 13.8 16.5 84 HICKERSON PARK 9145 1.0 8.1 12 13.8 9.2 150 HOLE-IN-ROCK 9150 4.0 7.0 57 13.8 8.7 159 INDIAN CREEK 9425 17.8 29.6 60 18.9 28.0 68 KELLEY R.S. 8180 10.9 16.9 64 16.1 22.3 72 SPIRIT LK 10223 8.3 -M * 19.7 -M * STEEL CREEK PARK 10200 12.7 17.6 72 15.9 18.7 85 ----- ----- Basin wide percent of average 52 88 UPPER BEAR RIVER BEAR RIVER RS 8500 .0 -M * 11.2 -M * BUG LAKE 7950 12.7 21.4 59 16.6 21.1 79 BURTS MILLER RANCH 8000 .4 -M * 9.6 -M * CHALK CREEK #1 8993 13.4 25.9 52 20.5 28.1 73 HAYDEN FORK 9212 3.3 16.1 20 19.5 23.5 83 KELLEY R.S. 8180 10.9 16.9 64 16.1 22.3 72 LILY LAKE 9156 4.9 14.1 35 13.4 19.7 68 MONTE CRISTO 8960 15.3 30.4 50 20.8 28.3 73 SALT RIVER SUMMIT 7760 6.5 13.9 47 11.5 20.5 56 ----- ----- Basin wide percent of average 48 72 ----------------------------------------------------------------------------- -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 1971-2000. 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.