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 29 , 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 13.0 * -M 24.2 * COTTONWOOD CREEK 7670 26.2 20.4 128 28.0 31.7 88 GRAND TARGHEE 9260 54.5 -M * 38.0 -M * GRANITE CREEK 6770 17.7 13.5 131 24.9 22.2 112 GRASSY LAKE 7265 39.8 34.1 117 47.5 40.6 117 GROS VENTRE SUMMIT 8750 13.4 13.6 99 15.6 15.1 103 GUNSIGHT PASS 9820 13.0 -M * 16.5 -M * LEWIS LAKE DIVIDE 7850 40.0 35.1 114 40.9 41.4 99 PHILLIPS BENCH 8200 36.3 29.8 122 38.5 32.9 117 SALT RIVER SUMMIT 7760 13.0 11.3 115 17.9 21.4 84 SNAKE RIVER STATION 6920 19.8 13.0 152 30.1 25.3 119 SPRING CREEK DIVIDE 9000 23.7 28.7 83 26.4 30.0 88 THUMB DIVIDE 7980 18.8 15.6 121 23.1 21.8 106 TOGWOTEE PASS 9580 30.1 27.8 108 33.3 28.7 116 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 31.8 * WILLOW CREEK 8380 34.3 31.0 111 43.1 37.3 116 ----- ----- Basin wide percent of average 114 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.6 25.9 107 26.6 23.3 114 BLACK BEAR 8170 48.8 40.3 121 47.0 45.5 103 CANYON 7870 18.1 11.6 156 22.9 17.6 130 FISHER CREEK 9100 44.7 37.8 118 42.5 41.6 102 MADISON PLATEAU 7750 33.6 24.6 137 35.5 30.2 118 NORTHEAST ENTRANCE 7350 9.9 7.6 130 15.1 14.6 103 PARKER PEAK 9400 31.2 24.5 127 -M 19.3 * SYLVAN LAKE 8420 22.9 23.9 96 29.5 24.5 120 THUMB DIVIDE 7980 18.8 15.6 121 23.1 21.8 106 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 31.8 * WHISKEY CREEK 6800 20.6 15.6 132 27.4 24.0 114 WHITE MILL 8700 30.8 26.4 117 30.5 30.9 99 WOLVERINE 7650 9.6 7.6 126 15.6 15.0 104 ----- ----- Basin wide percent of average 121 109 WIND RIVER BURROUGHS CREEK 8750 16.8 13.9 121 20.6 19.1 108 COLD SPRINGS 9630 4.8 4.7 102 11.5 13.7 84 DEER PARK 9700 16.5 19.0 87 22.5 26.6 85 HOBBS PARK 10100 15.6 17.9 87 17.3 16.6 104 LITTLE WARM 9370 10.3 11.3 91 15.8 16.6 95 SOUTH PASS 9040 15.1 18.1 83 19.6 22.4 88 ST. LAWRENCE ALT 8620 5.7 6.3 90 9.4 11.9 79 TOGWOTEE PASS 9580 30.1 27.8 108 33.3 28.7 116 TOWNSEND CREEK 8700 9.3 9.3 100 14.1 15.2 93 ----- ----- Basin wide percent of average 97 96 BIGHORN BASIN BALD MTN. 9380 18.8 23.5 80 17.7 21.0 84 BEAR TRAP MEADOW 8200 7.3 2.7 270 10.7 10.7 100 BLACKWATER 9780 29.4 28.6 103 27.0 24.5 110 BONE SPRINGS DIV 9350 20.0 18.2 110 20.1 18.0 112 EVENING STAR 9200 33.3 33.2 100 37.9 29.6 128 GRAVE SPRINGS 8550 11.1 11.0 101 12.0 12.9 93 KIRWIN 9550 13.8 13.0 106 16.5 14.0 118 MARQUETTE 8760 9.1 11.2 81 12.2 13.4 91 MIDDLE POWDER 7760 13.9 14.6 95 11.2 15.6 72 OWL CREEK 8975 2.7 4.0 68 8.2 8.0 102 POWDER RIVER PASS 9480 13.1 11.0 119 16.5 15.6 106 SHELL CREEK 9580 18.4 16.9 109 17.9 16.5 108 SYLVAN LAKE 8420 22.9 23.9 96 29.5 24.5 120 SYLVAN ROAD 7120 11.5 8.7 132 23.2 20.3 114 TIMBER CREEK 7950 4.8 4.9 98 9.5 10.2 93 YOUNTS PEAK 8350 18.7 18.1 103 19.6 18.6 105 ----- ----- Basin wide percent of average 102 106 SHOSHONE RIVER BLACKWATER 9780 29.4 28.6 103 27.0 24.5 110 EVENING STAR 9200 33.3 33.2 100 37.9 29.6 128 KIRWIN 9550 13.8 13.0 106 16.5 14.0 118 MARQUETTE 8760 9.1 11.2 81 12.2 13.4 91 SYLVAN LAKE 8420 22.9 23.9 96 29.5 24.5 120 SYLVAN ROAD 7120 11.5 8.7 132 23.2 20.3 114 YOUNTS PEAK 8350 18.7 18.1 103 19.6 18.6 105 ----- ----- Basin wide percent of average 101 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.3 2.7 270 10.7 10.7 100 BIG GOOSE 7990 10.2 11.9 86 14.8 12.6 117 BONE SPRINGS DIV 9350 20.0 18.2 110 20.1 18.0 112 BURGESS JUNCTION 7880 15.0 13.4 112 16.5 15.2 109 CLOUD PEAK RESERVOIR 9860 18.0 16.3 110 18.3 16.8 109 DOME LAKE 8880 12.7 13.7 93 17.8 16.5 108 GRAVE SPRINGS 8550 11.1 11.0 101 12.0 12.9 93 HANSEN SAWMILL 8360 5.3 5.0 106 10.9 10.8 101 MIDDLE POWDER 7760 13.9 14.6 95 11.2 15.6 72 POWDER RIVER PASS 9480 13.1 11.0 119 16.5 15.6 106 SUCKER CREEK 8880 16.4 13.3 123 19.8 17.1 116 TIE CREEK 6870 7.3 4.2 174 14.0 13.2 106 ----- ----- Basin wide percent of average 111 104 BELLE FOURCHE BLIND PARK 6890 5.2 4.3 121 13.0 13.9 94 COLE CANYON 5910 5.6 5.4 104 9.7 9.2 105 NORTH RAPID CREEK 6130 8.1 4.7 172 11.4 11.1 103 ----- ----- Basin wide percent of average 131 100 UPPER N. PLATTE RIVER COLUMBINE 9160 26.2 21.6 121 32.0 28.9 111 DIVIDE PEAK 8880 23.7 19.8 120 26.7 24.0 111 ELK RIVER 8700 22.4 15.8 142 26.1 22.8 114 JOE WRIGHT 10120 27.3 25.0 109 32.2 29.7 108 NORTH FRENCH CREEK 10130 34.1 34.4 99 34.4 29.3 117 OLD BATTLE 10000 38.0 36.6 104 45.0 39.5 114 SAGE CREEK BASIN 7850 16.1 11.5 140 19.3 13.9 139 SOUTH BRUSH CREEK 8440 11.8 11.5 103 19.6 19.9 98 TOWER 10500 48.7 52.0 94 46.8 44.7 105 WEBBER SPRINGS 9250 28.8 25.5 113 35.2 30.9 114 WILLOW CREEK PASS 9540 20.7 14.3 145 19.0 15.5 123 ----- ----- Basin wide percent of average 111 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.7 28.3 84 26.2 26.6 98 CASPER MTN. 7900 14.9 17.4 86 17.4 19.2 91 DEADMAN HILL 10220 21.2 19.6 108 22.6 20.7 109 DEER PARK 9700 16.5 19.0 87 22.5 26.6 85 LAPRELE CREEK 8375 7.3 7.6 96 14.1 16.2 87 RENO HILL 8400 15.5 15.2 102 20.3 19.9 102 ROACH 9700 20.6 18.6 111 25.4 22.2 114 SAND LAKE 10050 33.2 36.8 90 34.3 29.0 118 SOUTH PASS 9040 15.1 18.1 83 19.6 22.4 88 WINDY PEAK 7900 8.0 5.4 148 12.3 13.3 92 ----- ----- Basin wide percent of average 95 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 9.9 5.1 194 18.7 18.4 102 DIVIDE PEAK 8880 23.7 19.8 120 26.7 24.0 111 OLD BATTLE 10000 38.0 36.6 104 45.0 39.5 114 SANDSTONE RS 8150 16.3 10.2 160 23.9 21.7 110 WHISKEY PARK 8950 39.2 30.6 128 40.2 33.5 120 ----- ----- Basin wide percent of average 124 113 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.4 13.9 96 14.9 15.7 95 BLIND BULL SUM 8650 27.9 28.1 99 19.5 25.0 78 EAST RIM DIVIDE 7930 9.5 13.4 71 12.4 13.8 90 ELKHART PARK G.S. 9400 11.7 13.1 89 13.2 15.8 84 GROS VENTRE SUMMIT 8750 13.4 13.6 99 15.6 15.1 103 GUNSIGHT PASS 9820 13.0 -M * 16.5 -M * KENDALL R.S. 7740 10.5 10.6 99 15.2 16.4 93 LOOMIS PARK 8240 15.5 14.8 105 19.8 19.8 100 NEW FORK LAKE 8340 8.7 9.0 97 10.5 13.2 80 SNIDER BASIN 8060 13.6 13.1 104 15.8 18.4 86 SPRING CREEK DIVIDE 9000 23.7 28.7 83 26.4 30.0 88 TRIPLE PEAK 8500 25.2 24.3 104 31.8 28.4 112 ----- ----- Basin wide percent of average 95 92 LOWER GREEN RIVER HAMS FORK 7840 10.5 6.6 159 11.8 14.6 81 HEWINTA 9519 13.0 9.8 133 19.1 17.6 109 HICKERSON PARK 9145 5.1 6.2 82 11.2 10.0 112 HOLE-IN-ROCK 9150 5.4 5.2 104 11.8 9.6 123 INDIAN CREEK 9425 27.6 28.7 96 -M 29.2 * KELLEY R.S. 8180 15.8 14.7 107 19.9 23.4 85 STEEL CREEK PARK 10200 18.9 18.5 102 21.1 20.0 106 ----- ----- Basin wide percent of average 107 100 UPPER BEAR RIVER BUG LAKE 7950 18.1 18.8 96 18.8 22.2 85 HAYDEN FORK 9212 16.3 13.6 120 26.0 24.9 104 KELLEY R.S. 8180 15.8 14.7 107 19.9 23.4 85 LILY LAKE 9156 15.1 11.7 129 20.2 20.9 97 MONTE CRISTO 8960 31.8 28.8 110 29.2 30.0 97 SALT RIVER SUMMIT 7760 13.0 11.3 115 17.9 21.4 84 TRIAL LAKE 9992 24.3 26.5 92 27.2 29.1 93 ----- ----- Basin wide percent of average 107 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.