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 TUESDAY: APRIL 14 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.4 17.2 90 20.3 22.8 89 COTTONWOOD CREEK 7670 28.6 24.0 119 33.0 29.5 112 GRAND TARGHEE 9260 47.4 -M * 36.5 -M * GRANITE CREEK 6770 16.8 17.3 97 21.7 21.0 103 GRASSY LAKE 7265 33.6 37.1 91 36.4 38.2 95 GROS VENTRE SUMMIT 8750 -M 14.6 * 16.4 13.9 118 GUNSIGHT PASS 9820 16.0 -M * 17.1 -M * LEWIS LAKE DIVIDE 7850 32.8 36.7 89 35.1 39.1 90 PHILLIPS BENCH 8200 29.1 30.5 95 30.9 30.9 100 SALT RIVER SUMMIT 7760 15.2 14.6 104 17.2 20.1 86 SNAKE RIVER STATION 6920 17.5 17.9 98 23.2 23.8 97 SPRING CREEK DIVIDE 9000 29.3 28.4 103 28.1 28.3 99 THUMB DIVIDE 7980 21.0 18.9 111 22.3 20.3 110 TOGWOTEE PASS 9580 28.7 26.5 108 31.2 26.5 118 TWO OCEAN PLATEAU 9240 40.4 30.3 133 31.1 29.6 105 WILLOW CREEK 8380 37.0 31.8 116 41.7 34.6 121 ----- ----- Basin wide percent of average 104 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.9 25.3 98 22.8 21.6 106 BLACK BEAR 8170 37.5 40.8 92 37.5 43.0 87 CANYON 7870 14.4 14.1 102 15.7 16.5 95 FISHER CREEK 9100 38.5 36.9 104 37.6 38.8 97 MADISON PLATEAU 7750 24.0 26.2 92 25.6 28.7 89 NORTHEAST ENTRANCE 7350 11.3 10.9 104 14.9 13.6 110 PARKER PEAK 9400 29.3 23.3 126 -M 17.6 * SYLVAN LAKE 8420 21.9 24.1 91 25.1 22.5 112 THUMB DIVIDE 7980 21.0 18.9 111 22.3 20.3 110 TWO OCEAN PLATEAU 9240 40.4 30.3 133 31.1 29.6 105 WHISKEY CREEK 6800 17.7 17.8 99 21.1 22.5 94 WHITE MILL 8700 26.2 25.9 101 25.9 28.9 90 WOLVERINE 7650 12.0 11.4 105 13.3 13.8 96 ----- ----- Basin wide percent of average 104 98 WIND RIVER BURROUGHS CREEK 8750 16.3 15.2 107 17.0 17.5 97 COLD SPRINGS 9630 8.3 7.6 109 11.3 11.9 95 DEER PARK 9700 14.0 16.8 83 19.1 23.9 80 HOBBS PARK 10100 15.8 16.8 94 15.9 14.4 110 LITTLE WARM 9370 12.4 12.6 98 15.5 14.6 106 SOUTH PASS 9040 14.8 17.7 84 16.7 20.1 83 ST. LAWRENCE ALT 8620 7.3 7.5 97 10.9 10.0 109 TOGWOTEE PASS 9580 28.7 26.5 108 31.2 26.5 118 TOWNSEND CREEK 8700 10.9 9.8 111 14.0 13.1 107 ----- ----- Basin wide percent of average 98 100 BIGHORN BASIN BALD MTN. 9380 19.7 21.6 91 16.3 18.9 86 BEAR TRAP MEADOW 8200 8.2 4.8 171 10.3 9.2 112 BLACKWATER 9780 27.6 26.6 104 25.0 22.4 112 BONE SPRINGS DIV 9350 18.1 17.5 103 15.4 16.0 96 EVENING STAR 9200 32.0 31.9 100 33.4 27.3 122 GRAVE SPRINGS 8550 10.4 10.5 99 11.2 11.1 101 KIRWIN 9550 13.9 12.3 113 15.2 12.3 124 MARQUETTE 8760 7.9 10.4 76 10.0 11.2 89 MIDDLE POWDER 7760 12.7 13.8 92 11.1 13.6 82 OWL CREEK 8975 6.0 5.4 111 6.7 6.7 100 POWDER RIVER PASS 9480 13.3 11.8 113 15.7 13.6 115 SHELL CREEK 9580 17.4 16.0 109 16.5 14.6 113 SYLVAN LAKE 8420 21.9 24.1 91 25.1 22.5 112 SYLVAN ROAD 7120 14.6 12.5 117 20.6 18.8 110 TIMBER CREEK 7950 5.1 5.7 89 8.6 8.4 102 YOUNTS PEAK 8350 18.7 18.0 104 16.5 17.3 95 ----- ----- Basin wide percent of average 102 106 SHOSHONE RIVER BLACKWATER 9780 27.6 26.6 104 25.0 22.4 112 EVENING STAR 9200 32.0 31.9 100 33.4 27.3 122 KIRWIN 9550 13.9 12.3 113 15.2 12.3 124 MARQUETTE 8760 7.9 10.4 76 10.0 11.2 89 SYLVAN LAKE 8420 21.9 24.1 91 25.1 22.5 112 SYLVAN ROAD 7120 14.6 12.5 117 20.6 18.8 110 YOUNTS PEAK 8350 18.7 18.0 104 16.5 17.3 95 ----- ----- Basin wide percent of average 101 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.2 4.8 171 10.3 9.2 112 BIG GOOSE 7990 11.9 12.2 98 14.5 10.2 142 BONE SPRINGS DIV 9350 18.1 17.5 103 15.4 16.0 96 BURGESS JUNCTION 7880 13.9 13.1 106 14.3 13.4 107 CLOUD PEAK RESERVOIR 9860 19.1 15.0 127 18.4 14.4 128 DOME LAKE 8880 14.3 13.9 103 17.1 14.5 118 GRAVE SPRINGS 8550 10.4 10.5 99 11.2 11.1 101 HANSEN SAWMILL 8360 7.3 6.3 116 11.1 9.2 121 MIDDLE POWDER 7760 12.7 13.8 92 11.1 13.6 82 POWDER RIVER PASS 9480 13.3 11.8 113 15.7 13.6 115 SUCKER CREEK 8880 16.5 13.4 123 18.8 15.0 125 TIE CREEK 6870 7.3 5.4 135 16.0 11.2 143 ----- ----- Basin wide percent of average 111 115 BELLE FOURCHE BLIND PARK 6890 6.2 7.9 78 15.6 12.1 129 COLE CANYON 5910 7.2 7.2 100 13.4 7.5 179 NORTH RAPID CREEK 6130 9.8 8.9 110 15.2 9.4 162 ----- ----- Basin wide percent of average 97 152 UPPER N. PLATTE RIVER COLUMBINE 9160 27.9 24.8 112 29.2 26.9 109 DIVIDE PEAK 8880 27.7 20.8 133 29.3 22.2 132 ELK RIVER 8700 23.8 19.9 120 23.8 21.0 113 JOE WRIGHT 10120 24.7 23.3 106 30.2 26.9 112 NORTH FRENCH CREEK 10130 37.4 32.2 116 34.6 26.6 130 OLD BATTLE 10000 38.3 34.4 111 43.1 36.8 117 SAGE CREEK BASIN 7850 15.4 12.1 127 16.6 12.9 129 SOUTH BRUSH CREEK 8440 14.0 13.4 104 19.1 17.9 107 TOWER 10500 47.8 49.1 97 44.9 41.2 109 WEBBER SPRINGS 9250 28.6 26.2 109 32.6 28.6 114 WILLOW CREEK PASS 9540 14.2 13.4 106 13.7 14.0 98 ----- ----- Basin wide percent of average 111 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.7 26.1 98 23.9 24.1 99 CASPER MTN. 7900 14.4 16.5 87 15.1 16.3 93 DEADMAN HILL 10220 18.4 18.1 102 18.8 18.5 102 DEER PARK 9700 14.0 16.8 83 19.1 23.9 80 LAPRELE CREEK 8375 9.6 10.5 91 14.3 14.0 102 RENO HILL 8400 17.3 15.8 109 18.8 17.0 111 ROACH 9700 17.6 18.3 96 20.1 20.1 100 SAND LAKE 10050 34.0 34.7 98 32.0 26.2 122 SOUTH PASS 9040 14.8 17.7 84 16.7 20.1 83 WINDY PEAK 7900 9.5 8.2 116 11.6 11.6 100 ----- ----- Basin wide percent of average 96 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 17.8 9.1 196 20.0 17.0 118 DIVIDE PEAK 8880 27.7 20.8 133 29.3 22.2 132 OLD BATTLE 10000 38.3 34.4 111 43.1 36.8 117 SANDSTONE RS 8150 21.7 13.7 158 22.6 19.9 114 WHISKEY PARK 8950 35.4 30.7 115 37.3 30.7 121 ----- ----- Basin wide percent of average 130 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.5 15.3 88 13.5 14.4 94 BLIND BULL SUM 8650 28.7 28.9 99 20.9 23.6 89 EAST RIM DIVIDE 7930 10.7 13.9 77 12.7 12.8 99 ELKHART PARK G.S. 9400 14.5 14.0 104 15.8 14.4 110 GROS VENTRE SUMMIT 8750 -M 14.6 * 16.4 13.9 118 GUNSIGHT PASS 9820 16.0 -M * 17.1 -M * KENDALL R.S. 7740 11.3 13.8 82 14.4 15.4 94 LOOMIS PARK 8240 16.9 17.2 98 19.5 18.5 105 NEW FORK LAKE 8340 12.5 11.4 110 11.7 12.2 96 SNIDER BASIN 8060 14.8 15.0 99 15.6 17.3 90 SPRING CREEK DIVIDE 9000 29.3 28.4 103 28.1 28.3 99 TRIPLE PEAK 8500 24.7 25.9 95 27.5 26.5 104 ----- ----- Basin wide percent of average 96 99 LOWER GREEN RIVER HAMS FORK 7840 11.7 10.3 114 12.7 13.2 96 HEWINTA 9519 13.3 12.4 107 15.4 16.0 96 HICKERSON PARK 9145 7.2 8.4 86 10.8 8.8 123 HOLE-IN-ROCK 9150 7.3 7.4 99 10.1 8.3 122 INDIAN CREEK 9425 26.3 29.5 89 23.7 27.4 86 KELLEY R.S. 8180 17.1 17.3 99 19.2 21.9 88 STEEL CREEK PARK 10200 14.9 17.1 87 18.1 18.0 101 ----- ----- Basin wide percent of average 96 97 UPPER BEAR RIVER BUG LAKE 7950 20.1 21.8 92 19.2 20.6 93 HAYDEN FORK 9212 18.0 16.7 108 23.7 22.8 104 KELLEY R.S. 8180 17.1 17.3 99 19.2 21.9 88 LILY LAKE 9156 16.7 14.6 114 18.4 19.1 96 MONTE CRISTO 8960 29.2 30.6 95 28.4 27.5 103 SALT RIVER SUMMIT 7760 15.2 14.6 104 17.2 20.1 86 TRIAL LAKE 9992 26.1 26.3 99 24.6 26.9 91 ----- ----- Basin wide percent of average 100 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.