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 21 , 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 15.4 * -M 23.5 * COTTONWOOD CREEK 7670 26.2 22.7 115 27.2 30.5 89 GRAND TARGHEE 9260 52.2 -M * 36.7 -M * GRANITE CREEK 6770 18.3 15.7 117 24.5 21.6 113 GRASSY LAKE 7265 38.7 36.3 107 45.8 39.4 116 GROS VENTRE SUMMIT 8750 13.1 14.4 91 15.1 14.5 104 GUNSIGHT PASS 9820 12.9 -M * 15.5 -M * LEWIS LAKE DIVIDE 7850 38.2 36.4 105 40.1 40.3 100 PHILLIPS BENCH 8200 36.1 30.6 118 37.4 31.9 117 SALT RIVER SUMMIT 7760 13.3 13.4 99 17.2 20.8 83 SNAKE RIVER STATION 6920 19.8 15.9 125 29.3 24.6 119 SPRING CREEK DIVIDE 9000 23.2 28.9 80 25.5 29.1 88 THUMB DIVIDE 7980 19.1 17.6 109 22.4 21.0 107 TOGWOTEE PASS 9580 29.1 27.3 107 31.8 27.6 115 TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.7 * WILLOW CREEK 8380 33.9 31.9 106 41.3 35.9 115 ----- ----- Basin wide percent of average 106 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.0 25.7 105 25.7 22.4 115 BLACK BEAR 8170 -M 40.9 * 45.4 44.3 102 CANYON 7870 18.7 13.0 144 22.3 17.0 131 FISHER CREEK 9100 44.0 37.6 117 40.7 40.2 101 MADISON PLATEAU 7750 32.5 25.8 126 34.3 29.5 116 NORTHEAST ENTRANCE 7350 10.2 9.5 107 14.7 14.1 104 PARKER PEAK 9400 29.9 23.9 125 -M 18.4 * SYLVAN LAKE 8420 22.9 24.2 95 28.8 23.5 123 THUMB DIVIDE 7980 19.1 17.6 109 22.4 21.0 107 TWO OCEAN PLATEAU 9240 -M 31.3 * -M 30.7 * WHISKEY CREEK 6800 19.6 17.3 113 26.3 23.2 113 WHITE MILL 8700 30.0 26.3 114 29.5 29.9 99 WOLVERINE 7650 10.5 9.8 107 15.0 14.4 104 ----- ----- Basin wide percent of average 115 109 WIND RIVER BURROUGHS CREEK 8750 16.8 14.8 114 20.0 18.3 109 COLD SPRINGS 9630 6.1 5.8 105 11.0 12.7 87 DEER PARK 9700 16.7 17.9 93 22.0 25.1 88 HOBBS PARK 10100 15.5 17.1 91 16.3 15.5 105 LITTLE WARM 9370 10.4 12.1 86 15.0 15.6 96 SOUTH PASS 9040 15.4 17.9 86 19.0 21.2 90 ST. LAWRENCE ALT 8620 6.2 6.6 94 9.0 10.9 83 TOGWOTEE PASS 9580 29.1 27.3 107 31.8 27.6 115 TOWNSEND CREEK 8700 8.5 9.6 89 13.2 14.2 93 ----- ----- Basin wide percent of average 97 98 BIGHORN BASIN BALD MTN. 9380 18.0 22.6 80 16.6 19.9 83 BEAR TRAP MEADOW 8200 8.2 3.7 222 9.9 9.9 100 BLACKWATER 9780 28.4 27.4 104 25.7 23.4 110 BONE SPRINGS DIV 9350 19.2 17.8 108 19.2 17.0 113 EVENING STAR 9200 32.3 32.4 100 36.6 28.5 128 GRAVE SPRINGS 8550 10.7 11.0 97 11.3 12.0 94 KIRWIN 9550 13.4 12.5 107 15.8 13.1 121 MARQUETTE 8760 7.4 10.7 69 10.9 12.2 89 MIDDLE POWDER 7760 13.2 14.3 92 10.6 14.5 73 OWL CREEK 8975 3.8 4.7 81 7.5 7.3 103 POWDER RIVER PASS 9480 13.0 11.7 111 15.7 14.5 108 SHELL CREEK 9580 17.4 16.3 107 17.0 15.5 110 SYLVAN LAKE 8420 22.9 24.2 95 28.8 23.5 123 SYLVAN ROAD 7120 12.8 10.7 120 23.0 19.5 118 TIMBER CREEK 7950 5.1 5.2 98 9.1 9.2 99 YOUNTS PEAK 8350 18.1 18.2 99 19.0 18.0 106 ----- ----- Basin wide percent of average 100 107 SHOSHONE RIVER BLACKWATER 9780 28.4 27.4 104 25.7 23.4 110 EVENING STAR 9200 32.3 32.4 100 36.6 28.5 128 KIRWIN 9550 13.4 12.5 107 15.8 13.1 121 MARQUETTE 8760 7.4 10.7 69 10.9 12.2 89 SYLVAN LAKE 8420 22.9 24.2 95 28.8 23.5 123 SYLVAN ROAD 7120 12.8 10.7 120 23.0 19.5 118 YOUNTS PEAK 8350 18.1 18.2 99 19.0 18.0 106 ----- ----- Basin wide percent of average 99 116 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.2 3.7 222 9.9 9.9 100 BIG GOOSE 7990 10.5 12.5 84 13.9 11.5 121 BONE SPRINGS DIV 9350 19.2 17.8 108 19.2 17.0 113 BURGESS JUNCTION 7880 14.5 13.3 109 15.7 14.2 111 CLOUD PEAK RESERVOIR 9860 17.2 15.8 109 17.2 15.5 111 DOME LAKE 8880 12.6 13.8 91 16.9 15.5 109 GRAVE SPRINGS 8550 10.7 11.0 97 11.3 12.0 94 HANSEN SAWMILL 8360 6.4 5.6 114 10.4 9.9 105 MIDDLE POWDER 7760 13.2 14.3 92 10.6 14.5 73 POWDER RIVER PASS 9480 13.0 11.7 111 15.7 14.5 108 SUCKER CREEK 8880 16.1 13.5 119 18.9 16.0 118 TIE CREEK 6870 7.9 5.2 152 13.4 12.1 111 ----- ----- Basin wide percent of average 108 106 BELLE FOURCHE BLIND PARK 6890 7.3 6.8 107 12.6 13.0 97 COLE CANYON 5910 6.0 6.7 90 9.3 8.2 113 NORTH RAPID CREEK 6130 8.8 7.8 113 11.0 10.1 109 ----- ----- Basin wide percent of average 104 105 UPPER N. PLATTE RIVER COLUMBINE 9160 27.8 23.8 117 31.2 28.0 111 DIVIDE PEAK 8880 24.5 20.8 118 26.1 23.1 113 ELK RIVER 8700 25.5 18.5 138 25.5 21.9 116 JOE WRIGHT 10120 27.4 24.4 112 31.5 28.3 111 NORTH FRENCH CREEK 10130 34.5 33.6 103 33.1 27.9 119 OLD BATTLE 10000 37.7 35.6 106 43.9 38.1 115 SAGE CREEK BASIN 7850 18.2 12.1 150 19.0 13.4 142 SOUTH BRUSH CREEK 8440 13.8 12.8 108 19.2 18.8 102 TOWER 10500 47.7 50.8 94 45.7 43.0 106 WEBBER SPRINGS 9250 30.1 26.0 116 34.3 29.7 115 WILLOW CREEK PASS 9540 20.2 14.1 143 18.8 14.7 128 ----- ----- Basin wide percent of average 113 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.7 27.5 86 25.3 25.3 100 CASPER MTN. 7900 14.7 17.4 84 16.4 17.7 93 DEADMAN HILL 10220 20.4 19.0 107 22.1 19.5 113 DEER PARK 9700 16.7 17.9 93 22.0 25.1 88 LAPRELE CREEK 8375 7.5 9.3 81 13.2 15.0 88 RENO HILL 8400 14.8 16.0 92 18.3 18.4 99 ROACH 9700 21.6 18.5 117 25.0 21.1 118 SAND LAKE 10050 32.5 35.9 91 33.0 27.5 120 SOUTH PASS 9040 15.4 17.9 86 19.0 21.2 90 WINDY PEAK 7900 8.8 7.1 124 11.6 12.4 94 ----- ----- Basin wide percent of average 94 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.7 7.2 176 18.2 17.7 103 DIVIDE PEAK 8880 24.5 20.8 118 26.1 23.1 113 OLD BATTLE 10000 37.7 35.6 106 43.9 38.1 115 SANDSTONE RS 8150 17.4 12.4 140 23.5 20.7 114 WHISKEY PARK 8950 38.9 30.6 127 39.1 32.0 122 ----- ----- Basin wide percent of average 123 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.0 15.0 87 14.1 15.0 94 BLIND BULL SUM 8650 27.6 28.7 96 19.2 24.3 79 EAST RIM DIVIDE 7930 9.2 14.0 66 11.9 13.3 89 ELKHART PARK G.S. 9400 11.3 13.9 81 12.5 15.0 83 GROS VENTRE SUMMIT 8750 13.1 14.4 91 15.1 14.5 104 GUNSIGHT PASS 9820 12.9 -M * 15.5 -M * KENDALL R.S. 7740 11.4 12.6 90 14.6 15.9 92 LOOMIS PARK 8240 16.3 16.3 100 18.9 19.1 99 NEW FORK LAKE 8340 9.3 10.6 88 10.0 12.6 79 SNIDER BASIN 8060 13.8 14.5 95 15.2 17.9 85 SPRING CREEK DIVIDE 9000 23.2 28.9 80 25.5 29.1 88 TRIPLE PEAK 8500 25.4 25.7 99 30.9 27.4 113 ----- ----- Basin wide percent of average 89 92 LOWER GREEN RIVER HAMS FORK 7840 11.7 8.7 134 11.1 13.9 80 HEWINTA 9519 15.9 11.6 137 18.6 16.8 111 HICKERSON PARK 9145 6.7 7.7 87 10.9 9.4 116 HOLE-IN-ROCK 9150 6.3 6.6 95 11.6 8.9 130 INDIAN CREEK 9425 27.1 29.6 92 -M 28.3 * KELLEY R.S. 8180 15.3 16.4 93 19.1 22.6 85 STEEL CREEK PARK 10200 18.7 17.8 105 20.9 19.1 109 ----- ----- Basin wide percent of average 103 102 UPPER BEAR RIVER BUG LAKE 7950 18.4 20.9 88 18.1 21.4 85 HAYDEN FORK 9212 18.6 15.6 119 25.3 23.9 106 KELLEY R.S. 8180 15.3 16.4 93 19.1 22.6 85 LILY LAKE 9156 15.3 13.6 112 19.8 20.0 99 MONTE CRISTO 8960 31.2 30.2 103 28.3 28.7 99 SALT RIVER SUMMIT 7760 13.3 13.4 99 17.2 20.8 83 TRIAL LAKE 9992 24.0 26.6 90 26.4 28.0 94 ----- ----- Basin wide percent of average 100 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.