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 27 , 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 13.6 * -M 24.0 * COTTONWOOD CREEK 7670 26.7 21.1 127 28.0 31.4 89 GRAND TARGHEE 9260 53.9 -M * 37.4 -M * GRANITE CREEK 6770 18.4 14.1 130 24.8 22.1 112 GRASSY LAKE 7265 40.4 34.7 116 47.4 40.3 118 GROS VENTRE SUMMIT 8750 14.0 13.8 101 15.6 15.0 104 GUNSIGHT PASS 9820 13.2 -M * 16.4 -M * LEWIS LAKE DIVIDE 7850 40.0 35.5 113 40.8 41.1 99 PHILLIPS BENCH 8200 36.5 30.1 121 38.4 32.6 118 SALT RIVER SUMMIT 7760 13.4 11.9 113 17.7 21.3 83 SNAKE RIVER STATION 6920 20.8 13.8 151 30.2 25.2 120 SPRING CREEK DIVIDE 9000 23.3 28.8 81 26.2 29.8 88 THUMB DIVIDE 7980 20.1 16.1 125 23.0 21.6 106 TOGWOTEE PASS 9580 30.1 27.7 109 33.1 28.4 117 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.5 * WILLOW CREEK 8380 35.2 31.4 112 42.9 37.0 116 ----- ----- Basin wide percent of average 114 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.7 25.8 107 26.4 23.0 115 BLACK BEAR 8170 47.6 40.5 118 46.8 45.2 104 CANYON 7870 19.4 12.0 162 22.9 17.4 132 FISHER CREEK 9100 44.8 37.8 119 42.3 41.2 103 MADISON PLATEAU 7750 33.8 25.1 135 35.3 30.0 118 NORTHEAST ENTRANCE 7350 10.8 8.0 135 15.1 14.5 104 PARKER PEAK 9400 30.6 24.4 125 -M 19.1 * SYLVAN LAKE 8420 23.7 24.1 98 29.7 24.2 123 THUMB DIVIDE 7980 20.1 16.1 125 23.0 21.6 106 TWO OCEAN PLATEAU 9240 -M 31.7 * -M 31.5 * WHISKEY CREEK 6800 20.5 16.1 127 27.4 23.8 115 WHITE MILL 8700 30.6 26.4 116 30.4 30.6 99 WOLVERINE 7650 10.2 8.1 126 15.4 14.9 103 ----- ----- Basin wide percent of average 121 110 WIND RIVER BURROUGHS CREEK 8750 17.1 14.3 120 20.5 18.9 108 COLD SPRINGS 9630 6.0 4.9 122 11.4 13.4 85 DEER PARK 9700 16.8 19.5 86 22.7 26.3 86 HOBBS PARK 10100 15.9 18.0 88 17.1 16.3 105 LITTLE WARM 9370 11.3 11.7 97 15.6 16.3 96 SOUTH PASS 9040 15.7 18.2 86 19.7 22.1 89 ST. LAWRENCE ALT 8620 6.5 6.5 100 9.4 11.6 81 TOGWOTEE PASS 9580 30.1 27.7 109 33.1 28.4 117 TOWNSEND CREEK 8700 9.7 9.7 100 14.1 15.0 94 ----- ----- Basin wide percent of average 99 97 BIGHORN BASIN BALD MTN. 9380 18.8 23.3 81 17.3 20.7 84 BEAR TRAP MEADOW 8200 7.7 2.9 266 10.6 10.5 101 BLACKWATER 9780 29.3 28.3 104 26.8 24.2 111 BONE SPRINGS DIV 9350 20.0 18.2 110 19.8 17.8 111 EVENING STAR 9200 33.2 32.9 101 37.5 29.3 128 GRAVE SPRINGS 8550 11.1 11.1 100 12.0 12.7 94 KIRWIN 9550 14.1 12.9 109 16.5 13.8 120 MARQUETTE 8760 9.2 11.1 83 11.7 13.1 89 MIDDLE POWDER 7760 14.0 14.6 96 11.3 15.3 74 OWL CREEK 8975 3.8 4.1 93 8.1 7.8 104 POWDER RIVER PASS 9480 13.3 11.1 120 16.5 15.3 108 SHELL CREEK 9580 18.3 16.7 110 17.8 16.3 109 SYLVAN LAKE 8420 23.7 24.1 98 29.7 24.2 123 SYLVAN ROAD 7120 13.6 9.2 148 23.3 20.1 116 TIMBER CREEK 7950 5.4 5.1 106 9.6 9.9 97 YOUNTS PEAK 8350 18.6 18.2 102 19.6 18.5 106 ----- ----- Basin wide percent of average 104 107 SHOSHONE RIVER BLACKWATER 9780 29.3 28.3 104 26.8 24.2 111 EVENING STAR 9200 33.2 32.9 101 37.5 29.3 128 KIRWIN 9550 14.1 12.9 109 16.5 13.8 120 MARQUETTE 8760 9.2 11.1 83 11.7 13.1 89 SYLVAN LAKE 8420 23.7 24.1 98 29.7 24.2 123 SYLVAN ROAD 7120 13.6 9.2 148 23.3 20.1 116 YOUNTS PEAK 8350 18.6 18.2 102 19.6 18.5 106 ----- ----- Basin wide percent of average 104 115 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.7 2.9 266 10.6 10.5 101 BIG GOOSE 7990 10.5 12.1 87 14.3 12.4 115 BONE SPRINGS DIV 9350 20.0 18.2 110 19.8 17.8 111 BURGESS JUNCTION 7880 15.0 13.5 111 16.4 14.9 110 CLOUD PEAK RESERVOIR 9860 17.8 16.3 109 17.9 16.5 108 DOME LAKE 8880 13.3 13.8 96 17.5 16.3 107 GRAVE SPRINGS 8550 11.1 11.1 100 12.0 12.7 94 HANSEN SAWMILL 8360 6.2 5.2 119 10.9 10.6 103 MIDDLE POWDER 7760 14.0 14.6 96 11.3 15.3 74 POWDER RIVER PASS 9480 13.3 11.1 120 16.5 15.3 108 SUCKER CREEK 8880 16.6 13.5 123 19.5 16.8 116 TIE CREEK 6870 7.9 4.8 165 13.9 12.9 108 ----- ----- Basin wide percent of average 112 105 BELLE FOURCHE BLIND PARK 6890 5.8 5.2 112 13.0 13.7 95 COLE CANYON 5910 5.9 5.8 102 9.7 9.0 108 NORTH RAPID CREEK 6130 8.3 5.6 148 11.3 10.9 104 ----- ----- Basin wide percent of average 120 101 UPPER N. PLATTE RIVER COLUMBINE 9160 26.9 22.3 121 31.8 28.7 111 DIVIDE PEAK 8880 24.1 20.2 119 26.6 23.8 112 ELK RIVER 8700 23.6 16.6 142 25.9 22.6 115 JOE WRIGHT 10120 27.1 24.9 109 32.3 29.4 110 NORTH FRENCH CREEK 10130 33.9 34.3 99 34.3 28.9 119 OLD BATTLE 10000 38.2 36.4 105 44.7 39.2 114 SAGE CREEK BASIN 7850 17.1 11.7 146 19.3 13.8 140 SOUTH BRUSH CREEK 8440 13.2 11.9 111 19.4 19.6 99 TOWER 10500 48.3 51.8 93 46.7 44.3 105 WEBBER SPRINGS 9250 29.4 25.8 114 35.1 30.6 115 WILLOW CREEK PASS 9540 20.6 14.3 144 18.9 15.3 124 ----- ----- Basin wide percent of average 112 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.8 28.2 84 26.2 26.3 100 CASPER MTN. 7900 15.0 17.5 86 17.4 18.8 93 DEADMAN HILL 10220 20.7 19.5 106 22.6 20.4 111 DEER PARK 9700 16.8 19.5 86 22.7 26.3 86 LAPRELE CREEK 8375 7.6 8.1 94 14.0 15.9 88 RENO HILL 8400 15.8 15.5 102 20.1 19.5 103 ROACH 9700 21.0 18.7 112 25.3 21.9 116 SAND LAKE 10050 32.8 36.7 89 34.1 28.6 119 SOUTH PASS 9040 15.7 18.2 86 19.7 22.1 89 WINDY PEAK 7900 8.3 5.9 141 12.1 13.1 92 ----- ----- Basin wide percent of average 95 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.6 5.7 204 18.7 18.2 103 DIVIDE PEAK 8880 24.1 20.2 119 26.6 23.8 112 OLD BATTLE 10000 38.2 36.4 105 44.7 39.2 114 SANDSTONE RS 8150 17.5 10.8 162 23.9 21.4 112 WHISKEY PARK 8950 39.5 30.7 129 40.1 33.1 121 ----- ----- Basin wide percent of average 126 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.5 14.3 94 14.7 15.5 95 BLIND BULL SUM 8650 28.4 28.3 100 19.5 24.8 79 EAST RIM DIVIDE 7930 9.7 13.7 71 12.3 13.6 90 ELKHART PARK G.S. 9400 11.6 13.4 87 12.9 15.6 83 GROS VENTRE SUMMIT 8750 14.0 13.8 101 15.6 15.0 104 GUNSIGHT PASS 9820 13.2 -M * 16.4 -M * KENDALL R.S. 7740 11.5 11.2 103 15.1 16.3 93 LOOMIS PARK 8240 17.1 15.2 113 19.6 19.6 100 NEW FORK LAKE 8340 9.7 9.4 103 10.4 13.1 79 SNIDER BASIN 8060 14.1 13.5 104 15.6 18.3 85 SPRING CREEK DIVIDE 9000 23.3 28.8 81 26.2 29.8 88 TRIPLE PEAK 8500 26.3 24.8 106 31.7 28.2 112 ----- ----- Basin wide percent of average 96 92 LOWER GREEN RIVER HAMS FORK 7840 11.8 7.1 166 11.7 14.4 81 HEWINTA 9519 15.9 10.3 154 19.0 17.4 109 HICKERSON PARK 9145 5.8 6.6 88 11.0 9.9 111 HOLE-IN-ROCK 9150 6.0 5.6 107 11.7 9.4 124 INDIAN CREEK 9425 27.9 29.0 96 -M 29.0 * KELLEY R.S. 8180 16.5 15.2 109 19.7 23.2 85 STEEL CREEK PARK 10200 19.0 18.3 104 21.2 19.8 107 ----- ----- Basin wide percent of average 112 100 UPPER BEAR RIVER BUG LAKE 7950 19.1 19.4 98 18.6 22.0 85 HAYDEN FORK 9212 19.1 14.2 135 25.8 24.6 105 KELLEY R.S. 8180 16.5 15.2 109 19.7 23.2 85 LILY LAKE 9156 16.2 12.3 132 20.1 20.7 97 MONTE CRISTO 8960 32.5 29.2 111 29.1 29.7 98 SALT RIVER SUMMIT 7760 13.4 11.9 113 17.7 21.3 83 TRIAL LAKE 9992 25.3 26.6 95 27.1 28.9 94 ----- ----- Basin wide percent of average 110 93 ----------------------------------------------------------------------------- -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.