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: APRIL 27 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.5 14.0 75 21.6 23.9 90 COTTONWOOD CREEK 7670 27.3 21.4 128 35.6 31.2 114 GRAND TARGHEE 9260 50.8 -M * 39.3 -M * GRANITE CREEK 6770 13.0 14.4 90 23.5 22.0 107 GRASSY LAKE 7265 30.9 35.0 88 38.6 40.2 96 GROS VENTRE SUMMIT 8750 14.4 14.0 103 17.7 14.9 119 GUNSIGHT PASS 9820 16.3 -M * 18.5 -M * LEWIS LAKE DIVIDE 7850 33.3 35.7 93 36.8 41.0 90 PHILLIPS BENCH 8200 29.6 30.3 98 33.5 32.5 103 SALT RIVER SUMMIT 7760 13.7 12.2 112 18.8 21.2 89 SNAKE RIVER STATION 6920 12.7 14.2 89 25.2 25.1 100 SPRING CREEK DIVIDE 9000 31.8 28.9 110 30.8 29.7 104 THUMB DIVIDE 7980 19.5 16.4 119 24.3 21.5 113 TOGWOTEE PASS 9580 30.3 27.6 110 33.5 28.3 118 TWO OCEAN PLATEAU 9240 42.4 31.6 134 33.3 31.4 106 WILLOW CREEK 8380 34.3 31.5 109 44.9 36.8 122 ----- ----- Basin wide percent of average 105 105 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 25.4 25.8 98 23.5 22.9 103 BLACK BEAR 8170 37.9 40.7 93 39.7 45.1 88 CANYON 7870 13.8 12.2 113 17.6 17.3 102 FISHER CREEK 9100 39.0 37.8 103 38.7 41.0 94 MADISON PLATEAU 7750 24.5 25.2 97 28.0 29.9 94 NORTHEAST ENTRANCE 7350 5.5 8.2 67 15.2 14.4 106 PARKER PEAK 9400 30.5 24.3 126 21.4 19.0 113 SYLVAN LAKE 8420 21.1 24.1 88 26.8 24.1 111 THUMB DIVIDE 7980 19.5 16.4 119 24.3 21.5 113 TWO OCEAN PLATEAU 9240 42.4 31.6 134 33.3 31.4 106 WHISKEY CREEK 6800 17.9 16.3 110 23.3 23.7 98 WHITE MILL 8700 26.3 26.3 100 26.4 30.5 87 WOLVERINE 7650 8.8 8.3 106 14.1 14.8 95 ----- ----- Basin wide percent of average 105 99 WIND RIVER BURROUGHS CREEK 8750 17.5 14.3 122 19.3 18.8 103 COLD SPRINGS 9630 9.2 5.1 180 14.2 13.3 107 DEER PARK 9700 14.9 19.8 75 21.4 26.1 82 HOBBS PARK 10100 17.8 17.9 99 19.3 16.2 119 LITTLE WARM 9370 12.7 11.8 108 17.9 16.2 110 SOUTH PASS 9040 15.5 18.2 85 18.7 21.9 85 ST. LAWRENCE ALT 8620 7.7 6.5 118 13.8 11.5 120 TOGWOTEE PASS 9580 30.3 27.6 110 33.5 28.3 118 TOWNSEND CREEK 8700 11.5 9.7 119 16.4 14.8 111 ----- ----- Basin wide percent of average 105 104 BIGHORN BASIN BALD MTN. 9380 19.3 23.0 84 16.9 20.6 82 BEAR TRAP MEADOW 8200 5.5 3.0 183 11.0 10.4 106 BLACKWATER 9780 28.6 28.1 102 26.4 24.0 110 BONE SPRINGS DIV 9350 16.9 18.0 94 16.3 17.6 93 EVENING STAR 9200 31.0 32.8 95 34.8 29.2 119 GRAVE SPRINGS 8550 9.5 11.1 86 11.8 12.6 94 KIRWIN 9550 14.7 12.8 115 17.3 13.7 126 MARQUETTE 8760 7.8 10.9 72 11.4 13.0 88 MIDDLE POWDER 7760 11.7 14.4 81 12.0 15.2 79 OWL CREEK 8975 4.4 4.1 107 8.8 7.8 113 POWDER RIVER PASS 9480 11.7 11.1 105 17.0 15.2 112 SHELL CREEK 9580 17.8 16.6 107 17.4 16.2 107 SYLVAN LAKE 8420 21.1 24.1 88 26.8 24.1 111 SYLVAN ROAD 7120 7.3 9.5 77 21.5 20.0 108 TIMBER CREEK 7950 4.5 5.1 88 10.8 9.8 110 YOUNTS PEAK 8350 19.7 18.1 109 18.3 18.4 99 ----- ----- Basin wide percent of average 95 104 SHOSHONE RIVER BLACKWATER 9780 28.6 28.1 102 26.4 24.0 110 EVENING STAR 9200 31.0 32.8 95 34.8 29.2 119 KIRWIN 9550 14.7 12.8 115 17.3 13.7 126 MARQUETTE 8760 7.8 10.9 72 11.4 13.0 88 SYLVAN LAKE 8420 21.1 24.1 88 26.8 24.1 111 SYLVAN ROAD 7120 7.3 9.5 77 21.5 20.0 108 YOUNTS PEAK 8350 19.7 18.1 109 18.3 18.4 99 ----- ----- Basin wide percent of average 96 110 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.5 3.0 183 11.0 10.4 106 BIG GOOSE 7990 10.7 12.2 88 15.2 12.2 125 BONE SPRINGS DIV 9350 16.9 18.0 94 16.3 17.6 93 BURGESS JUNCTION 7880 13.1 13.3 98 14.9 14.8 101 CLOUD PEAK RESERVOIR 9860 19.2 16.1 119 19.8 16.3 121 DOME LAKE 8880 12.7 13.6 93 17.9 16.1 111 GRAVE SPRINGS 8550 9.5 11.1 86 11.8 12.6 94 HANSEN SAWMILL 8360 4.4 5.2 85 12.0 10.4 115 MIDDLE POWDER 7760 11.7 14.4 81 12.0 15.2 79 POWDER RIVER PASS 9480 11.7 11.1 105 17.0 15.2 112 SUCKER CREEK 8880 15.6 13.4 116 19.8 16.7 119 TIE CREEK 6870 4.2 5.0 84 16.7 12.8 130 ----- ----- Basin wide percent of average 99 108 BELLE FOURCHE BLIND PARK 6890 .8 5.3 15 16.9 13.6 124 COLE CANYON 5910 5.6 5.9 95 14.7 8.8 167 NORTH RAPID CREEK 6130 4.6 6.0 77 16.7 10.7 156 ----- ----- Basin wide percent of average 64 146 UPPER N. PLATTE RIVER COLUMBINE 9160 22.6 22.6 100 30.9 28.6 108 DIVIDE PEAK 8880 27.4 20.4 134 32.0 23.7 135 ELK RIVER 8700 17.0 17.0 100 24.8 22.5 110 JOE WRIGHT 10120 26.6 24.8 107 32.7 29.2 112 NORTH FRENCH CREEK 10130 38.5 34.2 113 36.9 28.8 128 OLD BATTLE 10000 39.6 36.2 109 45.6 39.0 117 SAGE CREEK BASIN 7850 13.4 11.8 114 18.4 13.7 134 SOUTH BRUSH CREEK 8440 10.8 12.1 89 20.9 19.5 107 TOWER 10500 49.2 51.7 95 47.8 44.1 108 WEBBER SPRINGS 9250 27.8 25.9 107 34.7 30.4 114 WILLOW CREEK PASS 9540 13.6 14.3 95 14.8 15.2 97 ----- ----- Basin wide percent of average 106 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.4 28.2 94 26.0 26.2 99 CASPER MTN. 7900 14.8 17.6 84 17.4 18.6 94 DEADMAN HILL 10220 22.2 19.4 114 22.5 20.2 111 DEER PARK 9700 14.9 19.8 75 21.4 26.1 82 LAPRELE CREEK 8375 9.5 8.3 114 16.2 15.7 103 RENO HILL 8400 16.5 15.6 106 20.8 19.3 108 ROACH 9700 18.7 18.7 100 22.9 21.8 105 SAND LAKE 10050 36.0 36.5 99 34.9 28.4 123 SOUTH PASS 9040 15.5 18.2 85 18.7 21.9 85 WINDY PEAK 7900 9.7 6.1 159 14.3 12.9 111 ----- ----- Basin wide percent of average 98 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.2 5.9 139 21.6 18.1 119 DIVIDE PEAK 8880 27.4 20.4 134 32.0 23.7 135 OLD BATTLE 10000 39.6 36.2 109 45.6 39.0 117 SANDSTONE RS 8150 16.6 11.1 150 24.1 21.3 113 WHISKEY PARK 8950 32.2 30.7 105 39.0 32.9 119 ----- ----- Basin wide percent of average 119 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.8 14.4 89 15.2 15.5 98 BLIND BULL SUM 8650 29.7 28.4 105 23.3 24.8 94 EAST RIM DIVIDE 7930 6.0 13.8 43 13.8 13.6 101 ELKHART PARK G.S. 9400 14.3 13.5 106 17.3 15.5 112 GROS VENTRE SUMMIT 8750 14.4 14.0 103 17.7 14.9 119 GUNSIGHT PASS 9820 16.3 -M * 18.5 -M * KENDALL R.S. 7740 6.7 11.5 58 15.6 16.2 96 LOOMIS PARK 8240 13.5 15.5 87 20.9 19.5 107 NEW FORK LAKE 8340 9.2 9.7 95 12.4 13.0 95 SNIDER BASIN 8060 13.9 13.7 101 16.9 18.2 93 SPRING CREEK DIVIDE 9000 31.8 28.9 110 30.8 29.7 104 TRIPLE PEAK 8500 23.8 25.0 95 30.3 28.0 108 ----- ----- Basin wide percent of average 93 103 LOWER GREEN RIVER HAMS FORK 7840 8.2 7.4 111 14.5 14.3 101 HEWINTA 9519 7.9 10.6 75 16.5 17.3 95 HICKERSON PARK 9145 5.5 6.8 81 12.7 9.8 130 HOLE-IN-ROCK 9150 5.4 5.8 93 12.4 9.3 133 INDIAN CREEK 9425 -M 29.1 * 25.6 28.9 89 KELLEY R.S. 8180 15.4 15.4 100 20.6 23.1 89 STEEL CREEK PARK 10200 16.8 18.3 92 20.2 19.7 103 ----- ----- Basin wide percent of average 92 100 UPPER BEAR RIVER BUG LAKE 7950 18.6 19.7 94 20.7 21.9 95 HAYDEN FORK 9212 14.1 14.5 97 26.1 24.5 107 KELLEY R.S. 8180 15.4 15.4 100 20.6 23.1 89 LILY LAKE 9156 13.3 12.5 106 20.9 20.6 101 MONTE CRISTO 8960 28.1 29.4 96 30.9 29.5 105 SALT RIVER SUMMIT 7760 13.7 12.2 112 18.8 21.2 89 TRIAL LAKE 9992 27.4 26.6 103 28.1 28.7 98 ----- ----- Basin wide percent of average 100 98 ----------------------------------------------------------------------------- -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.