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 SUNDAY: APRIL 5 , 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 18.1 90 19.8 21.9 90 COTTONWOOD CREEK 7670 28.0 24.3 115 31.4 28.2 111 GRAND TARGHEE 9260 44.3 -M * 34.5 -M * GRANITE CREEK 6770 16.8 18.5 91 21.2 20.3 104 GRASSY LAKE 7265 33.0 36.6 90 35.2 36.9 95 GROS VENTRE SUMMIT 8750 -M 14.5 * 15.8 13.3 119 GUNSIGHT PASS 9820 15.3 -M * 16.2 -M * LEWIS LAKE DIVIDE 7850 31.7 36.2 88 33.7 37.7 89 PHILLIPS BENCH 8200 28.6 29.6 97 29.7 29.8 100 SALT RIVER SUMMIT 7760 15.6 14.8 105 16.8 19.3 87 SNAKE RIVER STATION 6920 17.7 19.1 93 22.7 22.8 100 SPRING CREEK DIVIDE 9000 28.2 27.3 103 27.3 27.1 101 THUMB DIVIDE 7980 20.8 19.3 108 21.5 19.4 111 TOGWOTEE PASS 9580 28.1 25.5 110 30.4 25.3 120 TWO OCEAN PLATEAU 9240 38.6 28.9 134 30.0 28.4 106 WILLOW CREEK 8380 35.6 31.0 115 39.9 33.0 121 ----- ----- Basin wide percent of average 103 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.5 24.0 98 21.6 20.6 105 BLACK BEAR 8170 38.0 40.1 95 -M 41.4 * CANYON 7870 14.0 14.0 100 15.2 15.8 96 FISHER CREEK 9100 37.4 35.8 104 36.1 37.3 97 MADISON PLATEAU 7750 23.5 25.7 91 25.0 27.5 91 NORTHEAST ENTRANCE 7350 11.3 11.3 100 13.9 13.0 107 PARKER PEAK 9400 27.0 22.2 122 -M 16.7 * SYLVAN LAKE 8420 21.8 23.2 94 23.9 21.5 111 THUMB DIVIDE 7980 20.8 19.3 108 21.5 19.4 111 TWO OCEAN PLATEAU 9240 38.6 28.9 134 30.0 28.4 106 WHISKEY CREEK 6800 17.4 17.6 99 20.8 21.5 97 WHITE MILL 8700 -M 24.9 * -M 27.7 * WOLVERINE 7650 12.3 11.7 105 12.3 13.1 94 ----- ----- Basin wide percent of average 104 101 WIND RIVER BURROUGHS CREEK 8750 16.0 14.9 107 16.7 16.7 100 COLD SPRINGS 9630 8.4 8.9 94 10.8 11.0 98 DEER PARK 9700 13.6 17.3 79 18.3 22.5 81 HOBBS PARK 10100 15.3 15.6 98 15.2 13.2 115 LITTLE WARM 9370 12.4 12.2 102 15.1 13.8 109 SOUTH PASS 9040 14.4 17.1 84 14.8 18.9 78 ST. LAWRENCE ALT 8620 7.2 7.5 96 10.6 9.1 116 TOGWOTEE PASS 9580 28.1 25.5 110 30.4 25.3 120 TOWNSEND CREEK 8700 10.9 9.3 117 13.3 12.0 111 ----- ----- Basin wide percent of average 98 102 BIGHORN BASIN BALD MTN. 9380 20.1 20.3 99 15.8 17.8 89 BEAR TRAP MEADOW 8200 9.7 5.2 187 10.1 8.5 119 BLACKWATER 9780 26.1 25.2 104 23.5 21.1 111 BONE SPRINGS DIV 9350 18.5 16.7 111 14.9 15.0 99 EVENING STAR 9200 30.9 30.4 102 31.5 26.0 121 GRAVE SPRINGS 8550 10.3 9.8 105 10.9 10.0 109 KIRWIN 9550 13.4 11.7 115 14.7 11.5 128 MARQUETTE 8760 7.5 9.5 79 9.5 10.1 94 MIDDLE POWDER 7760 12.7 12.3 103 10.9 12.7 86 OWL CREEK 8975 5.6 5.8 97 5.7 6.1 93 POWDER RIVER PASS 9480 13.2 11.1 119 14.9 12.7 117 SHELL CREEK 9580 17.2 15.1 114 16.5 13.7 120 SYLVAN LAKE 8420 21.8 23.2 94 23.9 21.5 111 SYLVAN ROAD 7120 15.1 12.8 118 19.8 18.0 110 TIMBER CREEK 7950 4.8 5.9 81 8.6 7.6 113 YOUNTS PEAK 8350 18.2 17.5 104 16.1 16.6 97 ----- ----- Basin wide percent of average 105 108 SHOSHONE RIVER BLACKWATER 9780 26.1 25.2 104 23.5 21.1 111 EVENING STAR 9200 30.9 30.4 102 31.5 26.0 121 KIRWIN 9550 13.4 11.7 115 14.7 11.5 128 MARQUETTE 8760 7.5 9.5 79 9.5 10.1 94 SYLVAN LAKE 8420 21.8 23.2 94 23.9 21.5 111 SYLVAN ROAD 7120 15.1 12.8 118 19.8 18.0 110 YOUNTS PEAK 8350 18.2 17.5 104 16.1 16.6 97 ----- ----- Basin wide percent of average 102 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.7 5.2 187 10.1 8.5 119 BIG GOOSE 7990 12.1 11.1 109 14.3 8.9 161 BONE SPRINGS DIV 9350 18.5 16.7 111 14.9 15.0 99 BURGESS JUNCTION 7880 13.8 12.0 115 14.2 12.5 114 CLOUD PEAK RESERVOIR 9860 19.1 13.9 137 17.5 13.2 133 DOME LAKE 8880 14.9 12.9 116 16.9 13.5 125 GRAVE SPRINGS 8550 10.3 9.8 105 10.9 10.0 109 HANSEN SAWMILL 8360 8.0 6.5 123 10.8 8.4 129 MIDDLE POWDER 7760 12.7 12.3 103 10.9 12.7 86 POWDER RIVER PASS 9480 13.2 11.1 119 14.9 12.7 117 SUCKER CREEK 8880 16.8 12.2 138 18.5 13.9 133 TIE CREEK 6870 8.3 6.2 134 -M 10.2 * ----- ----- Basin wide percent of average 121 119 BELLE FOURCHE BLIND PARK 6890 6.6 8.4 79 15.2 11.3 135 COLE CANYON 5910 7.7 7.0 110 13.4 6.8 197 NORTH RAPID CREEK 6130 11.1 8.5 131 14.6 8.8 166 ----- ----- Basin wide percent of average 106 161 UPPER N. PLATTE RIVER COLUMBINE 9160 28.1 25.1 112 28.2 25.8 109 DIVIDE PEAK 8880 25.8 20.3 127 27.1 21.2 128 ELK RIVER 8700 23.5 19.9 118 22.8 20.0 114 JOE WRIGHT 10120 24.6 21.9 112 29.3 25.3 116 NORTH FRENCH CREEK 10130 35.8 30.2 119 32.7 25.2 130 OLD BATTLE 10000 34.9 32.9 106 40.4 35.3 114 SAGE CREEK BASIN 7850 14.6 11.8 124 14.9 12.3 121 SOUTH BRUSH CREEK 8440 13.6 13.3 102 17.6 16.8 105 TOWER 10500 46.4 46.7 99 43.4 39.2 111 WEBBER SPRINGS 9250 27.1 26.4 103 30.8 27.3 113 WILLOW CREEK PASS 9540 13.7 12.5 110 13.5 13.1 103 ----- ----- Basin wide percent of average 110 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.8 24.5 101 23.0 22.6 102 CASPER MTN. 7900 14.5 15.1 96 14.4 14.8 97 DEADMAN HILL 10220 17.3 16.9 102 17.7 17.3 102 DEER PARK 9700 13.6 17.3 79 18.3 22.5 81 LAPRELE CREEK 8375 10.3 11.0 94 13.5 12.9 105 RENO HILL 8400 16.3 14.7 111 17.2 15.4 112 ROACH 9700 16.8 17.5 96 19.4 19.0 102 SAND LAKE 10050 32.3 33.3 97 29.4 24.7 119 SOUTH PASS 9040 14.4 17.1 84 14.8 18.9 78 WINDY PEAK 7900 10.0 8.3 120 11.3 10.8 105 ----- ----- Basin wide percent of average 97 100 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 18.1 10.6 171 19.1 16.2 118 DIVIDE PEAK 8880 25.8 20.3 127 27.1 21.2 128 OLD BATTLE 10000 34.9 32.9 106 40.4 35.3 114 SANDSTONE RS 8150 19.8 14.6 136 21.2 19.1 111 WHISKEY PARK 8950 34.7 30.6 113 35.3 29.3 120 ----- ----- Basin wide percent of average 122 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.6 14.9 85 12.5 13.7 91 BLIND BULL SUM 8650 27.2 28.6 95 20.2 22.8 89 EAST RIM DIVIDE 7930 10.6 13.5 79 12.3 12.3 100 ELKHART PARK G.S. 9400 13.3 13.7 97 14.5 13.7 106 GROS VENTRE SUMMIT 8750 -M 14.5 * 15.8 13.3 119 GUNSIGHT PASS 9820 15.3 -M * 16.2 -M * KENDALL R.S. 7740 11.8 14.5 81 14.1 14.9 95 LOOMIS PARK 8240 16.7 17.5 95 18.9 17.8 106 NEW FORK LAKE 8340 12.1 11.4 106 10.9 11.6 94 SNIDER BASIN 8060 15.0 14.9 101 15.3 16.5 93 SPRING CREEK DIVIDE 9000 28.2 27.3 103 27.3 27.1 101 TRIPLE PEAK 8500 25.1 25.5 98 26.9 25.4 106 ----- ----- Basin wide percent of average 95 100 LOWER GREEN RIVER HAMS FORK 7840 11.8 11.7 101 12.3 12.5 98 HEWINTA 9519 11.7 12.4 94 14.5 15.0 97 HICKERSON PARK 9145 6.1 7.9 77 9.2 8.2 112 HOLE-IN-ROCK 9150 6.6 7.3 90 9.4 7.7 122 INDIAN CREEK 9425 25.9 28.7 90 22.8 26.1 87 KELLEY R.S. 8180 17.1 17.3 99 18.8 20.9 90 STEEL CREEK PARK 10200 14.0 16.2 86 17.4 16.7 104 ----- ----- Basin wide percent of average 92 97 UPPER BEAR RIVER BUG LAKE 7950 20.1 21.5 93 18.7 19.7 95 HAYDEN FORK 9212 17.7 16.8 105 22.8 21.6 106 KELLEY R.S. 8180 17.1 17.3 99 18.8 20.9 90 LILY LAKE 9156 15.7 14.0 112 17.8 18.0 99 MONTE CRISTO 8960 28.6 30.3 94 27.5 26.2 105 SALT RIVER SUMMIT 7760 15.6 14.8 105 16.8 19.3 87 TRIAL LAKE 9992 24.8 25.6 97 23.4 25.6 91 ----- ----- Basin wide percent of average 100 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.