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 13 , 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 17.2 * -M 22.8 * COTTONWOOD CREEK 7670 26.9 24.0 112 26.7 29.5 91 GRAND TARGHEE 9260 51.1 -M * 35.4 -M * GRANITE CREEK 6770 19.4 17.3 112 24.5 21.0 117 GRASSY LAKE 7265 38.9 37.1 105 44.9 38.2 118 GROS VENTRE SUMMIT 8750 13.6 14.6 93 15.0 13.9 108 GUNSIGHT PASS 9820 13.0 -M * 15.3 -M * LEWIS LAKE DIVIDE 7850 37.9 36.7 103 39.9 39.1 102 PHILLIPS BENCH 8200 35.7 30.5 117 37.0 30.9 120 SALT RIVER SUMMIT 7760 14.6 14.6 100 17.1 20.1 85 SNAKE RIVER STATION 6920 21.5 17.9 120 29.1 23.8 122 SPRING CREEK DIVIDE 9000 23.4 28.4 82 25.4 28.3 90 THUMB DIVIDE 7980 20.3 18.9 107 22.0 20.3 108 TOGWOTEE PASS 9580 29.1 26.5 110 31.3 26.5 118 TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 * WILLOW CREEK 8380 35.4 31.8 111 40.3 34.6 116 ----- ----- Basin wide percent of average 106 108 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 26.8 25.3 106 25.4 21.6 118 BLACK BEAR 8170 47.9 40.8 117 -M 43.0 * CANYON 7870 18.7 14.1 133 22.0 16.5 133 FISHER CREEK 9100 43.3 36.9 117 -M 38.8 * MADISON PLATEAU 7750 31.3 26.2 119 33.3 28.7 116 NORTHEAST ENTRANCE 7350 -M 10.9 * -M 13.6 * PARKER PEAK 9400 28.4 23.3 122 -M 17.6 * SYLVAN LAKE 8420 23.2 24.1 96 28.0 22.5 124 THUMB DIVIDE 7980 20.3 18.9 107 22.0 20.3 108 TWO OCEAN PLATEAU 9240 -M 30.3 * -M 29.6 * WHISKEY CREEK 6800 19.6 17.8 110 25.9 22.5 115 WHITE MILL 8700 29.6 25.9 114 -M 28.9 * WOLVERINE 7650 11.3 11.4 99 15.0 13.8 109 ----- ----- Basin wide percent of average 113 118 WIND RIVER BURROUGHS CREEK 8750 16.9 15.2 111 19.8 17.5 113 COLD SPRINGS 9630 7.9 7.6 104 11.0 11.9 92 DEER PARK 9700 17.1 16.8 102 21.7 23.9 91 HOBBS PARK 10100 15.7 16.8 93 15.6 14.4 108 LITTLE WARM 9370 11.1 12.6 88 14.8 14.6 101 SOUTH PASS 9040 15.9 17.7 90 18.8 20.1 94 ST. LAWRENCE ALT 8620 7.7 7.5 103 9.0 10.0 90 TOGWOTEE PASS 9580 29.1 26.5 110 31.3 26.5 118 TOWNSEND CREEK 8700 9.9 9.8 101 13.3 13.1 102 ----- ----- Basin wide percent of average 101 102 BIGHORN BASIN BALD MTN. 9380 17.8 21.6 82 16.4 18.9 87 BEAR TRAP MEADOW 8200 9.9 4.8 206 9.9 9.2 108 BLACKWATER 9780 27.8 26.6 105 25.4 22.4 113 BONE SPRINGS DIV 9350 19.3 17.5 110 18.8 16.0 118 EVENING STAR 9200 32.4 31.9 102 35.6 27.3 130 GRAVE SPRINGS 8550 10.9 10.5 104 11.1 11.1 100 KIRWIN 9550 13.2 12.3 107 15.8 12.3 128 MARQUETTE 8760 8.4 10.4 81 10.9 11.2 97 MIDDLE POWDER 7760 12.5 13.8 91 10.0 13.6 74 OWL CREEK 8975 6.1 5.4 113 7.3 6.7 109 POWDER RIVER PASS 9480 13.3 11.8 113 15.4 13.6 113 SHELL CREEK 9580 17.0 16.0 106 16.4 14.6 112 SYLVAN LAKE 8420 23.2 24.1 96 28.0 22.5 124 SYLVAN ROAD 7120 14.1 12.5 113 22.7 18.8 121 TIMBER CREEK 7950 5.3 5.7 93 8.9 8.4 106 YOUNTS PEAK 8350 18.2 18.0 101 18.9 17.3 109 ----- ----- Basin wide percent of average 103 111 SHOSHONE RIVER BLACKWATER 9780 27.8 26.6 105 25.4 22.4 113 EVENING STAR 9200 32.4 31.9 102 35.6 27.3 130 KIRWIN 9550 13.2 12.3 107 15.8 12.3 128 MARQUETTE 8760 8.4 10.4 81 10.9 11.2 97 SYLVAN LAKE 8420 23.2 24.1 96 28.0 22.5 124 SYLVAN ROAD 7120 14.1 12.5 113 22.7 18.8 121 YOUNTS PEAK 8350 18.2 18.0 101 18.9 17.3 109 ----- ----- Basin wide percent of average 101 119 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.9 4.8 206 9.9 9.2 108 BIG GOOSE 7990 10.6 12.2 87 13.4 10.2 131 BONE SPRINGS DIV 9350 19.3 17.5 110 18.8 16.0 118 BURGESS JUNCTION 7880 14.0 13.1 107 15.4 13.4 115 CLOUD PEAK RESERVOIR 9860 17.4 15.0 116 16.8 14.4 117 DOME LAKE 8880 13.2 13.9 95 16.3 14.5 112 GRAVE SPRINGS 8550 10.9 10.5 104 11.1 11.1 100 HANSEN SAWMILL 8360 7.9 6.3 125 10.1 9.2 110 MIDDLE POWDER 7760 12.5 13.8 91 10.0 13.6 74 POWDER RIVER PASS 9480 13.3 11.8 113 15.4 13.6 113 SUCKER CREEK 8880 16.4 13.4 122 18.3 15.0 122 TIE CREEK 6870 8.9 5.4 165 13.1 11.2 117 ----- ----- Basin wide percent of average 112 111 BELLE FOURCHE BLIND PARK 6890 9.7 7.9 123 12.7 12.1 105 COLE CANYON 5910 7.7 7.2 107 9.2 7.5 123 NORTH RAPID CREEK 6130 10.7 8.9 120 11.0 9.4 117 ----- ----- Basin wide percent of average 117 113 UPPER N. PLATTE RIVER COLUMBINE 9160 30.2 24.8 122 31.1 26.9 116 DIVIDE PEAK 8880 26.7 20.8 128 26.2 22.2 118 ELK RIVER 8700 29.5 19.9 148 25.5 21.0 121 JOE WRIGHT 10120 27.4 23.3 118 29.7 26.9 110 NORTH FRENCH CREEK 10130 34.9 32.2 108 32.9 26.6 124 OLD BATTLE 10000 38.0 34.4 110 40.6 36.8 110 SAGE CREEK BASIN 7850 18.9 12.1 156 19.0 12.9 147 SOUTH BRUSH CREEK 8440 16.6 13.4 124 19.0 17.9 106 TOWER 10500 47.9 49.1 98 33.6 41.2 82 WEBBER SPRINGS 9250 30.8 26.2 118 34.0 28.6 119 WILLOW CREEK PASS 9540 19.4 13.4 145 18.4 14.0 131 ----- ----- Basin wide percent of average 119 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 24.1 26.1 92 24.9 24.1 103 CASPER MTN. 7900 16.0 16.5 97 16.0 16.3 98 DEADMAN HILL 10220 20.6 18.1 114 21.7 18.5 117 DEER PARK 9700 17.1 16.8 102 21.7 23.9 91 LAPRELE CREEK 8375 9.7 10.5 92 13.1 14.0 94 RENO HILL 8400 16.1 15.8 102 18.2 17.0 107 ROACH 9700 22.0 18.3 120 24.6 20.1 122 SAND LAKE 10050 33.3 34.7 96 32.8 26.2 125 SOUTH PASS 9040 15.9 17.7 90 18.8 20.1 94 WINDY PEAK 7900 10.3 8.2 126 11.7 11.6 101 ----- ----- Basin wide percent of average 101 106 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 18.5 9.1 203 18.3 17.0 108 DIVIDE PEAK 8880 26.7 20.8 128 26.2 22.2 118 OLD BATTLE 10000 38.0 34.4 110 40.6 36.8 110 SANDSTONE RS 8150 20.4 13.7 149 23.8 19.9 120 WHISKEY PARK 8950 37.3 30.7 121 37.8 30.7 123 ----- ----- Basin wide percent of average 130 116 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.3 15.3 93 14.3 14.4 99 BLIND BULL SUM 8650 27.3 28.9 94 19.2 23.6 81 EAST RIM DIVIDE 7930 10.1 13.9 73 12.0 12.8 94 ELKHART PARK G.S. 9400 12.0 14.0 86 12.5 14.4 87 GROS VENTRE SUMMIT 8750 13.6 14.6 93 15.0 13.9 108 GUNSIGHT PASS 9820 13.0 -M * 15.3 -M * KENDALL R.S. 7740 12.8 13.8 93 14.9 15.4 97 LOOMIS PARK 8240 17.1 17.2 99 19.0 18.5 103 NEW FORK LAKE 8340 10.1 11.4 89 10.1 12.2 83 SNIDER BASIN 8060 14.7 15.0 98 15.4 17.3 89 SPRING CREEK DIVIDE 9000 23.4 28.4 82 25.4 28.3 90 TRIPLE PEAK 8500 27.4 25.9 106 30.6 26.5 115 ----- ----- Basin wide percent of average 92 95 LOWER GREEN RIVER HAMS FORK 7840 13.3 10.3 129 11.2 13.2 85 HEWINTA 9519 17.9 12.4 144 18.6 16.0 116 HICKERSON PARK 9145 9.1 8.4 108 11.2 8.8 127 HOLE-IN-ROCK 9150 8.0 7.4 108 11.6 8.3 140 INDIAN CREEK 9425 28.0 29.5 95 -M 27.4 * KELLEY R.S. 8180 16.8 17.3 97 19.2 21.9 88 STEEL CREEK PARK 10200 18.2 17.1 106 20.7 18.0 115 ----- ----- Basin wide percent of average 109 107 UPPER BEAR RIVER BUG LAKE 7950 19.1 21.8 88 18.0 20.6 87 HAYDEN FORK 9212 22.4 16.7 134 25.0 22.8 110 KELLEY R.S. 8180 16.8 17.3 97 19.2 21.9 88 LILY LAKE 9156 17.1 14.6 117 19.6 19.1 103 MONTE CRISTO 8960 31.6 30.6 103 28.1 27.5 102 SALT RIVER SUMMIT 7760 14.6 14.6 100 17.1 20.1 85 TRIAL LAKE 9992 24.2 26.3 92 26.5 26.9 99 ----- ----- Basin wide percent of average 103 97 ----------------------------------------------------------------------------- -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.