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 15 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 -M 16.8 * -M 22.9 * COTTONWOOD CREEK 7670 26.8 23.8 113 26.9 29.8 90 GRAND TARGHEE 9260 51.5 -M * 35.8 -M * GRANITE CREEK 6770 19.1 17.0 112 24.5 21.1 116 GRASSY LAKE 7265 38.2 37.0 103 44.9 38.5 117 GROS VENTRE SUMMIT 8750 13.2 14.6 90 15.1 14.0 108 GUNSIGHT PASS 9820 13.1 -M * 15.4 -M * LEWIS LAKE DIVIDE 7850 37.7 36.7 103 39.9 39.4 101 PHILLIPS BENCH 8200 35.6 30.6 116 37.2 31.2 119 SALT RIVER SUMMIT 7760 13.2 14.4 92 17.1 20.3 84 SNAKE RIVER STATION 6920 20.7 17.5 118 29.0 24.0 121 SPRING CREEK DIVIDE 9000 23.8 28.5 84 25.5 28.5 89 THUMB DIVIDE 7980 18.0 18.7 96 22.1 20.5 108 TOGWOTEE PASS 9580 28.7 26.7 107 31.4 26.8 117 TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 * WILLOW CREEK 8380 34.3 31.9 108 40.8 34.9 117 ----- ----- Basin wide percent of average 104 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.0 25.5 106 25.6 21.8 117 BLACK BEAR 8170 47.0 40.9 115 44.5 43.3 103 CANYON 7870 18.1 13.9 130 22.0 16.6 133 FISHER CREEK 9100 43.3 37.0 117 40.5 39.2 103 MADISON PLATEAU 7750 32.1 26.1 123 33.4 28.9 116 NORTHEAST ENTRANCE 7350 -M 10.7 * -M 13.7 * PARKER PEAK 9400 29.0 23.4 124 25.8 17.8 145 SYLVAN LAKE 8420 22.4 24.2 93 28.0 22.8 123 THUMB DIVIDE 7980 18.0 18.7 96 22.1 20.5 108 TWO OCEAN PLATEAU 9240 -M 30.6 * -M 29.9 * WHISKEY CREEK 6800 18.8 17.8 106 25.9 22.6 115 WHITE MILL 8700 29.5 26.0 113 -M 29.1 * WOLVERINE 7650 10.3 11.0 94 15.2 13.9 109 ----- ----- Basin wide percent of average 112 114 WIND RIVER BURROUGHS CREEK 8750 16.7 15.1 111 19.9 17.7 112 COLD SPRINGS 9630 7.2 7.1 101 11.0 12.1 91 DEER PARK 9700 16.6 17.1 97 21.7 24.1 90 HOBBS PARK 10100 15.3 16.8 91 15.7 14.7 107 LITTLE WARM 9370 10.4 12.5 83 14.9 14.9 100 SOUTH PASS 9040 15.5 17.7 88 18.7 20.4 92 ST. LAWRENCE ALT 8620 6.9 7.3 95 9.1 10.2 89 TOGWOTEE PASS 9580 28.7 26.7 107 31.4 26.8 117 TOWNSEND CREEK 8700 9.4 9.8 96 13.1 13.4 98 ----- ----- Basin wide percent of average 97 101 BIGHORN BASIN BALD MTN. 9380 17.8 21.9 81 16.8 19.1 88 BEAR TRAP MEADOW 8200 9.2 4.7 196 9.9 9.4 105 BLACKWATER 9780 27.9 26.9 104 25.6 22.6 113 BONE SPRINGS DIV 9350 19.1 17.7 108 19.0 16.3 117 EVENING STAR 9200 32.6 32.0 102 36.2 27.6 131 GRAVE SPRINGS 8550 10.6 10.7 99 11.1 11.4 97 KIRWIN 9550 13.3 12.3 108 15.8 12.5 126 MARQUETTE 8760 8.2 10.6 77 11.2 11.4 98 MIDDLE POWDER 7760 12.3 14.0 88 10.0 13.9 72 OWL CREEK 8975 5.5 5.2 106 7.3 6.9 106 POWDER RIVER PASS 9480 12.4 11.9 104 15.4 13.8 112 SHELL CREEK 9580 17.0 16.1 106 16.5 14.9 111 SYLVAN LAKE 8420 22.4 24.2 93 28.0 22.8 123 SYLVAN ROAD 7120 13.1 12.1 108 22.7 19.0 119 TIMBER CREEK 7950 5.2 5.7 91 8.8 8.6 102 YOUNTS PEAK 8350 18.3 18.1 101 18.9 17.5 108 ----- ----- Basin wide percent of average 100 110 SHOSHONE RIVER BLACKWATER 9780 27.9 26.9 104 25.6 22.6 113 EVENING STAR 9200 32.6 32.0 102 36.2 27.6 131 KIRWIN 9550 13.3 12.3 108 15.8 12.5 126 MARQUETTE 8760 8.2 10.6 77 11.2 11.4 98 SYLVAN LAKE 8420 22.4 24.2 93 28.0 22.8 123 SYLVAN ROAD 7120 13.1 12.1 108 22.7 19.0 119 YOUNTS PEAK 8350 18.3 18.1 101 18.9 17.5 108 ----- ----- Basin wide percent of average 100 119 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.2 4.7 196 9.9 9.4 105 BIG GOOSE 7990 10.4 12.4 84 13.7 10.6 129 BONE SPRINGS DIV 9350 19.1 17.7 108 19.0 16.3 117 BURGESS JUNCTION 7880 14.1 13.2 107 15.5 13.6 114 CLOUD PEAK RESERVOIR 9860 17.0 15.3 111 17.2 14.7 117 DOME LAKE 8880 12.9 14.0 92 16.5 14.8 111 GRAVE SPRINGS 8550 10.6 10.7 99 11.1 11.4 97 HANSEN SAWMILL 8360 7.4 6.2 119 10.4 9.3 112 MIDDLE POWDER 7760 12.3 14.0 88 10.0 13.9 72 POWDER RIVER PASS 9480 12.4 11.9 104 15.4 13.8 112 SUCKER CREEK 8880 16.1 13.5 119 18.7 15.2 123 TIE CREEK 6870 8.5 5.3 160 13.1 11.4 115 ----- ----- Basin wide percent of average 108 110 BELLE FOURCHE BLIND PARK 6890 9.2 7.6 121 12.7 12.3 103 COLE CANYON 5910 7.3 7.1 103 9.2 7.7 119 NORTH RAPID CREEK 6130 10.5 8.8 119 11.1 9.6 116 ----- ----- Basin wide percent of average 115 111 UPPER N. PLATTE RIVER COLUMBINE 9160 29.6 24.7 120 31.3 27.2 115 DIVIDE PEAK 8880 26.6 20.9 127 26.2 22.4 117 ELK RIVER 8700 29.8 19.6 152 25.6 21.2 121 JOE WRIGHT 10120 27.4 23.6 116 30.8 27.2 113 NORTH FRENCH CREEK 10130 35.5 32.6 109 33.0 26.9 123 OLD BATTLE 10000 38.0 34.7 110 43.7 37.2 117 SAGE CREEK BASIN 7850 20.0 12.1 165 19.0 13.0 146 SOUTH BRUSH CREEK 8440 16.4 13.3 123 19.1 18.1 106 TOWER 10500 48.3 49.5 98 -M 41.7 * WEBBER SPRINGS 9250 30.6 26.1 117 34.1 28.9 118 WILLOW CREEK PASS 9540 19.5 13.6 143 18.5 14.1 131 ----- ----- Basin wide percent of average 119 119 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.4 26.5 92 25.0 24.4 102 CASPER MTN. 7900 16.0 16.8 95 16.1 16.7 96 DEADMAN HILL 10220 20.7 18.3 113 21.7 18.7 116 DEER PARK 9700 16.6 17.1 97 21.7 24.1 90 LAPRELE CREEK 8375 9.3 10.2 91 13.3 14.2 94 RENO HILL 8400 16.0 15.9 101 18.5 17.3 107 ROACH 9700 22.0 18.4 120 24.6 20.4 121 SAND LAKE 10050 33.4 35.0 95 32.9 26.5 124 SOUTH PASS 9040 15.5 17.7 88 18.7 20.4 92 WINDY PEAK 7900 10.1 8.0 126 11.7 11.8 99 ----- ----- Basin wide percent of average 100 105 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 17.0 8.7 195 18.4 17.2 107 DIVIDE PEAK 8880 26.6 20.9 127 26.2 22.4 117 OLD BATTLE 10000 38.0 34.7 110 43.7 37.2 117 SANDSTONE RS 8150 19.9 13.4 149 23.8 20.1 118 WHISKEY PARK 8950 39.6 30.7 129 39.0 31.0 126 ----- ----- Basin wide percent of average 130 118 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.6 15.3 89 14.4 14.5 99 BLIND BULL SUM 8650 27.7 28.9 96 19.2 23.8 81 EAST RIM DIVIDE 7930 9.4 14.0 67 12.1 12.9 94 ELKHART PARK G.S. 9400 11.7 14.0 84 12.7 14.5 88 GROS VENTRE SUMMIT 8750 13.2 14.6 90 15.1 14.0 108 GUNSIGHT PASS 9820 13.1 -M * 15.4 -M * KENDALL R.S. 7740 12.1 13.6 89 15.0 15.5 97 LOOMIS PARK 8240 16.5 17.1 96 19.0 18.7 102 NEW FORK LAKE 8340 9.8 11.3 87 10.3 12.3 84 SNIDER BASIN 8060 14.0 14.9 94 15.5 17.5 89 SPRING CREEK DIVIDE 9000 23.8 28.5 84 25.5 28.5 89 TRIPLE PEAK 8500 26.3 25.9 102 30.6 26.7 115 ----- ----- Basin wide percent of average 90 95 LOWER GREEN RIVER HAMS FORK 7840 12.8 10.0 128 11.2 13.4 84 HEWINTA 9519 17.5 12.3 142 18.7 16.2 115 HICKERSON PARK 9145 8.5 8.3 102 11.3 8.9 127 HOLE-IN-ROCK 9150 6.7 7.3 92 11.7 8.5 138 INDIAN CREEK 9425 27.4 29.6 93 -M 27.6 * KELLEY R.S. 8180 15.5 17.2 90 19.2 22.0 87 STEEL CREEK PARK 10200 18.3 17.3 106 20.7 18.3 113 ----- ----- Basin wide percent of average 105 106 UPPER BEAR RIVER BUG LAKE 7950 18.6 21.7 86 18.1 20.8 87 HAYDEN FORK 9212 21.1 16.5 128 25.2 23.1 109 KELLEY R.S. 8180 15.5 17.2 90 19.2 22.0 87 LILY LAKE 9156 16.9 14.5 117 19.7 19.4 102 MONTE CRISTO 8960 31.4 30.6 103 28.1 27.8 101 SALT RIVER SUMMIT 7760 13.2 14.4 92 17.1 20.3 84 TRIAL LAKE 9992 24.5 26.4 93 26.4 27.2 97 ----- ----- 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.