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 6 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 16.2 18.0 90 19.8 22.0 90 COTTONWOOD CREEK 7670 28.0 24.4 115 31.5 28.3 111 GRAND TARGHEE 9260 44.4 -M * 34.5 -M * GRANITE CREEK 6770 16.8 18.4 91 21.2 20.4 104 GRASSY LAKE 7265 33.0 36.7 90 35.2 37.0 95 GROS VENTRE SUMMIT 8750 -M 14.5 * 15.8 13.3 119 GUNSIGHT PASS 9820 15.4 -M * 16.2 -M * LEWIS LAKE DIVIDE 7850 31.7 36.3 87 33.7 37.8 89 PHILLIPS BENCH 8200 28.6 29.8 96 29.7 29.9 99 SALT RIVER SUMMIT 7760 15.6 14.9 105 16.8 19.4 87 SNAKE RIVER STATION 6920 17.8 19.0 94 22.6 22.9 99 SPRING CREEK DIVIDE 9000 28.2 27.5 103 27.2 27.3 100 THUMB DIVIDE 7980 20.8 19.3 108 21.6 19.5 111 TOGWOTEE PASS 9580 28.2 25.7 110 30.3 25.4 119 TWO OCEAN PLATEAU 9240 38.6 29.1 133 30.0 28.6 105 WILLOW CREEK 8380 35.8 31.1 115 39.9 33.2 120 ----- ----- Basin wide percent of average 103 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.6 24.1 98 21.7 20.7 105 BLACK BEAR 8170 38.0 40.3 94 36.4 41.6 87 CANYON 7870 14.1 14.0 101 15.2 15.9 96 FISHER CREEK 9100 37.4 35.9 104 36.3 37.5 97 MADISON PLATEAU 7750 23.6 25.8 91 25.0 27.6 91 NORTHEAST ENTRANCE 7350 11.3 11.2 101 13.9 13.1 106 PARKER PEAK 9400 27.0 22.3 121 -M 16.8 * SYLVAN LAKE 8420 21.8 23.2 94 23.8 21.6 110 THUMB DIVIDE 7980 20.8 19.3 108 21.6 19.5 111 TWO OCEAN PLATEAU 9240 38.6 29.1 133 30.0 28.6 105 WHISKEY CREEK 6800 17.4 17.7 98 20.9 21.6 97 WHITE MILL 8700 -M 25.0 * -M 27.8 * WOLVERINE 7650 12.4 11.7 106 12.4 13.2 94 ----- ----- Basin wide percent of average 104 99 WIND RIVER BURROUGHS CREEK 8750 16.0 14.9 107 16.8 16.8 100 COLD SPRINGS 9630 8.4 8.8 95 10.8 11.1 97 DEER PARK 9700 13.6 17.3 79 18.3 22.7 81 HOBBS PARK 10100 15.3 15.7 97 15.2 13.4 113 LITTLE WARM 9370 12.6 12.3 102 15.1 13.9 109 SOUTH PASS 9040 14.4 17.2 84 14.9 19.1 78 ST. LAWRENCE ALT 8620 7.1 7.6 93 10.5 9.2 114 TOGWOTEE PASS 9580 28.2 25.7 110 30.3 25.4 119 TOWNSEND CREEK 8700 10.8 9.4 115 13.6 12.1 112 ----- ----- Basin wide percent of average 98 101 BIGHORN BASIN BALD MTN. 9380 20.1 20.3 99 16.0 18.0 89 BEAR TRAP MEADOW 8200 9.7 5.1 190 10.3 8.6 120 BLACKWATER 9780 26.1 25.4 103 23.6 21.2 111 BONE SPRINGS DIV 9350 18.5 16.8 110 15.1 15.1 100 EVENING STAR 9200 31.0 30.5 102 31.6 26.1 121 GRAVE SPRINGS 8550 10.3 9.8 105 11.0 10.1 109 KIRWIN 9550 13.4 11.8 114 14.8 11.6 128 MARQUETTE 8760 7.6 9.6 79 9.6 10.2 94 MIDDLE POWDER 7760 12.8 12.4 103 11.0 12.8 86 OWL CREEK 8975 5.9 5.8 102 5.8 6.2 94 POWDER RIVER PASS 9480 13.3 11.2 119 15.0 12.8 117 SHELL CREEK 9580 17.2 15.2 113 16.5 13.8 120 SYLVAN LAKE 8420 21.8 23.2 94 23.8 21.6 110 SYLVAN ROAD 7120 15.2 12.8 119 19.9 18.1 110 TIMBER CREEK 7950 4.9 5.9 83 8.5 7.7 110 YOUNTS PEAK 8350 18.2 17.6 103 16.2 16.6 98 ----- ----- Basin wide percent of average 105 108 SHOSHONE RIVER BLACKWATER 9780 26.1 25.4 103 23.6 21.2 111 EVENING STAR 9200 31.0 30.5 102 31.6 26.1 121 KIRWIN 9550 13.4 11.8 114 14.8 11.6 128 MARQUETTE 8760 7.6 9.6 79 9.6 10.2 94 SYLVAN LAKE 8420 21.8 23.2 94 23.8 21.6 110 SYLVAN ROAD 7120 15.2 12.8 119 19.9 18.1 110 YOUNTS PEAK 8350 18.2 17.6 103 16.2 16.6 98 ----- ----- Basin wide percent of average 102 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.7 5.1 190 10.3 8.6 120 BIG GOOSE 7990 12.1 11.3 107 14.2 9.0 158 BONE SPRINGS DIV 9350 18.5 16.8 110 15.1 15.1 100 BURGESS JUNCTION 7880 13.8 12.2 113 14.1 12.6 112 CLOUD PEAK RESERVOIR 9860 19.2 13.9 138 17.6 13.4 131 DOME LAKE 8880 14.9 13.0 115 17.0 13.6 125 GRAVE SPRINGS 8550 10.3 9.8 105 11.0 10.1 109 HANSEN SAWMILL 8360 8.1 6.6 123 10.8 8.5 127 MIDDLE POWDER 7760 12.8 12.4 103 11.0 12.8 86 POWDER RIVER PASS 9480 13.3 11.2 119 15.0 12.8 117 SUCKER CREEK 8880 16.8 12.3 137 18.5 14.0 132 TIE CREEK 6870 8.3 6.1 136 -M 10.3 * ----- ----- Basin wide percent of average 121 118 BELLE FOURCHE BLIND PARK 6890 6.6 8.3 80 15.2 11.4 133 COLE CANYON 5910 7.7 7.0 110 13.5 6.9 196 NORTH RAPID CREEK 6130 11.1 8.6 129 14.7 8.8 167 ----- ----- Basin wide percent of average 106 160 UPPER N. PLATTE RIVER COLUMBINE 9160 28.1 25.1 112 28.3 25.9 109 DIVIDE PEAK 8880 25.9 20.4 127 27.2 21.3 128 ELK RIVER 8700 23.6 20.0 118 22.9 20.1 114 JOE WRIGHT 10120 24.6 22.1 111 29.5 25.5 116 NORTH FRENCH CREEK 10130 35.9 30.5 118 32.8 25.3 130 OLD BATTLE 10000 35.4 33.1 107 40.5 35.5 114 SAGE CREEK BASIN 7850 14.6 11.8 124 15.0 12.3 122 SOUTH BRUSH CREEK 8440 13.7 13.3 103 17.6 16.9 104 TOWER 10500 46.7 47.0 99 43.5 39.4 110 WEBBER SPRINGS 9250 27.2 26.4 103 30.9 27.4 113 WILLOW CREEK PASS 9540 13.7 12.6 109 13.5 13.2 102 ----- ----- Basin wide percent of average 110 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.8 24.6 101 23.1 22.8 101 CASPER MTN. 7900 14.5 15.2 95 14.6 15.0 97 DEADMAN HILL 10220 17.3 17.0 102 17.8 17.4 102 DEER PARK 9700 13.6 17.3 79 18.3 22.7 81 LAPRELE CREEK 8375 10.1 11.0 92 13.6 13.0 105 RENO HILL 8400 16.4 14.9 110 17.3 15.6 111 ROACH 9700 17.0 17.7 96 19.4 19.2 101 SAND LAKE 10050 32.5 33.4 97 29.6 24.9 119 SOUTH PASS 9040 14.4 17.2 84 14.9 19.1 78 WINDY PEAK 7900 10.0 8.4 119 11.4 10.9 105 ----- ----- Basin wide percent of average 97 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 18.4 10.5 175 19.1 16.3 117 DIVIDE PEAK 8880 25.9 20.4 127 27.2 21.3 128 OLD BATTLE 10000 35.4 33.1 107 40.5 35.5 114 SANDSTONE RS 8150 19.9 14.5 137 21.2 19.2 110 WHISKEY PARK 8950 34.8 30.6 114 35.3 29.4 120 ----- ----- Basin wide percent of average 123 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.6 15.0 84 12.3 13.8 89 BLIND BULL SUM 8650 27.4 28.6 96 20.3 22.9 89 EAST RIM DIVIDE 7930 10.6 13.5 79 12.3 12.4 99 ELKHART PARK G.S. 9400 13.4 13.8 97 14.6 13.8 106 GROS VENTRE SUMMIT 8750 -M 14.5 * 15.8 13.3 119 GUNSIGHT PASS 9820 15.4 -M * 16.2 -M * KENDALL R.S. 7740 11.8 14.4 82 14.0 14.9 94 LOOMIS PARK 8240 16.9 17.5 97 19.0 17.9 106 NEW FORK LAKE 8340 12.3 11.5 107 11.0 11.7 94 SNIDER BASIN 8060 15.0 14.9 101 15.3 16.6 92 SPRING CREEK DIVIDE 9000 28.2 27.5 103 27.2 27.3 100 TRIPLE PEAK 8500 25.2 25.6 98 26.9 25.5 105 ----- ----- Basin wide percent of average 95 99 LOWER GREEN RIVER HAMS FORK 7840 11.8 11.5 103 12.3 12.6 98 HEWINTA 9519 11.8 12.4 95 14.4 15.1 95 HICKERSON PARK 9145 5.9 8.0 74 9.1 8.2 111 HOLE-IN-ROCK 9150 6.5 7.4 88 9.4 7.8 121 INDIAN CREEK 9425 25.9 28.8 90 22.8 26.3 87 KELLEY R.S. 8180 17.1 17.3 99 18.6 21.0 89 STEEL CREEK PARK 10200 14.1 16.3 87 17.4 16.9 103 ----- ----- Basin wide percent of average 92 96 UPPER BEAR RIVER BUG LAKE 7950 20.2 21.6 94 18.7 19.8 94 HAYDEN FORK 9212 17.7 16.8 105 22.8 21.7 105 KELLEY R.S. 8180 17.1 17.3 99 18.6 21.0 89 LILY LAKE 9156 15.6 14.2 110 17.8 18.1 98 MONTE CRISTO 8960 28.6 30.4 94 27.6 26.3 105 SALT RIVER SUMMIT 7760 15.6 14.9 105 16.8 19.4 87 TRIAL LAKE 9992 24.9 25.7 97 23.4 25.7 91 ----- ----- Basin wide percent of average 99 96 ----------------------------------------------------------------------------- -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.