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 WEDNESDAY: APRIL 30 , 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 12.6 * -M 24.3 * COTTONWOOD CREEK 7670 25.7 20.1 128 28.0 31.8 88 GRAND TARGHEE 9260 54.6 -M * 38.0 -M * GRANITE CREEK 6770 17.2 13.2 130 24.9 22.3 112 GRASSY LAKE 7265 39.4 33.7 117 47.5 40.7 117 GROS VENTRE SUMMIT 8750 13.3 13.4 99 15.7 15.2 103 GUNSIGHT PASS 9820 12.8 -M * 16.5 -M * LEWIS LAKE DIVIDE 7850 39.9 34.8 115 41.0 41.5 99 PHILLIPS BENCH 8200 35.8 29.6 121 38.4 33.0 116 SALT RIVER SUMMIT 7760 -M 11.0 * -M 21.5 * SNAKE RIVER STATION 6920 18.5 12.6 147 30.2 25.4 119 SPRING CREEK DIVIDE 9000 24.0 28.7 84 26.5 30.1 88 THUMB DIVIDE 7980 17.9 15.3 117 23.1 21.9 105 TOGWOTEE PASS 9580 30.0 27.9 108 33.3 28.8 116 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 * WILLOW CREEK 8380 33.3 30.9 108 43.2 37.5 115 ----- ----- Basin wide percent of average 113 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.9 25.9 108 26.6 23.4 114 BLACK BEAR 8170 48.8 40.1 122 47.0 45.7 103 CANYON 7870 17.8 11.5 155 22.9 17.6 130 FISHER CREEK 9100 44.6 37.8 118 42.6 41.7 102 MADISON PLATEAU 7750 33.3 24.4 136 35.5 30.3 117 NORTHEAST ENTRANCE 7350 9.0 7.4 122 15.2 14.7 103 PARKER PEAK 9400 31.7 24.5 129 27.1 19.4 140 SYLVAN LAKE 8420 22.3 23.9 93 29.7 24.6 121 THUMB DIVIDE 7980 17.9 15.3 117 23.1 21.9 105 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.0 * WHISKEY CREEK 6800 20.6 15.4 134 27.4 24.1 114 WHITE MILL 8700 30.8 26.4 117 30.6 31.1 98 WOLVERINE 7650 9.1 7.4 123 15.6 15.1 103 ----- ----- Basin wide percent of average 121 111 WIND RIVER BURROUGHS CREEK 8750 16.5 13.8 120 20.6 19.2 107 COLD SPRINGS 9630 3.9 4.9 80 11.5 13.8 83 DEER PARK 9700 16.1 19.0 85 22.6 26.8 84 HOBBS PARK 10100 15.2 18.0 84 17.4 16.8 104 LITTLE WARM 9370 9.7 11.3 86 15.8 16.7 95 SOUTH PASS 9040 14.6 18.1 81 19.6 22.6 87 ST. LAWRENCE ALT 8620 4.9 6.3 78 9.4 12.0 78 TOGWOTEE PASS 9580 30.0 27.9 108 33.3 28.8 116 TOWNSEND CREEK 8700 8.7 9.2 95 14.1 15.4 92 ----- ----- Basin wide percent of average 93 95 BIGHORN BASIN BALD MTN. 9380 18.5 23.5 79 17.8 21.2 84 BEAR TRAP MEADOW 8200 6.8 2.7 252 110.7 10.8 1025 BLACKWATER 9780 29.3 28.7 102 27.1 24.6 110 BONE SPRINGS DIV 9350 20.1 18.3 110 20.2 18.2 111 EVENING STAR 9200 33.5 33.2 101 38.0 29.8 128 GRAVE SPRINGS 8550 11.0 11.1 99 12.0 13.0 92 KIRWIN 9550 13.6 13.0 105 16.5 14.1 117 MARQUETTE 8760 8.6 11.2 77 12.2 13.6 90 MIDDLE POWDER 7760 13.6 14.5 94 11.2 15.7 71 OWL CREEK 8975 1.7 4.1 41 8.2 8.1 101 POWDER RIVER PASS 9480 12.4 10.9 114 16.6 15.7 106 SHELL CREEK 9580 17.6 16.9 104 18.0 16.7 108 SYLVAN LAKE 8420 22.3 23.9 93 29.7 24.6 121 SYLVAN ROAD 7120 10.4 8.4 124 23.3 20.4 114 TIMBER CREEK 7950 4.3 4.9 88 9.6 10.4 92 YOUNTS PEAK 8350 18.7 18.2 103 19.6 18.7 105 ----- ----- Basin wide percent of average 100 142 SHOSHONE RIVER BLACKWATER 9780 29.3 28.7 102 27.1 24.6 110 EVENING STAR 9200 33.5 33.2 101 38.0 29.8 128 KIRWIN 9550 13.6 13.0 105 16.5 14.1 117 MARQUETTE 8760 8.6 11.2 77 12.2 13.6 90 SYLVAN LAKE 8420 22.3 23.9 93 29.7 24.6 121 SYLVAN ROAD 7120 10.4 8.4 124 23.3 20.4 114 YOUNTS PEAK 8350 18.7 18.2 103 19.6 18.7 105 ----- ----- Basin wide percent of average 100 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.8 2.7 252 110.7 10.8 1025 BIG GOOSE 7990 9.9 11.7 85 14.8 12.8 116 BONE SPRINGS DIV 9350 20.1 18.3 110 20.2 18.2 111 BURGESS JUNCTION 7880 14.8 13.3 111 16.5 15.3 108 CLOUD PEAK RESERVOIR 9860 17.4 16.3 107 18.4 16.9 109 DOME LAKE 8880 12.0 13.7 88 17.8 16.7 107 GRAVE SPRINGS 8550 11.0 11.1 99 12.0 13.0 92 HANSEN SAWMILL 8360 4.4 5.0 88 11.0 10.9 101 MIDDLE POWDER 7760 13.6 14.5 94 11.2 15.7 71 POWDER RIVER PASS 9480 12.4 10.9 114 16.6 15.7 106 SUCKER CREEK 8880 15.8 13.2 120 19.9 17.3 115 TIE CREEK 6870 6.5 4.2 155 14.0 13.4 104 ----- ----- Basin wide percent of average 107 160 BELLE FOURCHE BLIND PARK 6890 4.3 4.0 108 13.2 14.1 94 COLE CANYON 5910 4.9 5.2 94 9.8 9.4 104 NORTH RAPID CREEK 6130 7.6 4.2 181 11.5 11.3 102 ----- ----- Basin wide percent of average 125 99 UPPER N. PLATTE RIVER COLUMBINE 9160 25.8 21.3 121 32.3 29.0 111 DIVIDE PEAK 8880 23.6 19.6 120 26.7 24.2 110 ELK RIVER 8700 21.0 15.4 136 26.1 22.9 114 JOE WRIGHT 10120 27.1 25.1 108 32.2 29.9 108 NORTH FRENCH CREEK 10130 34.0 34.5 99 34.4 29.5 117 OLD BATTLE 10000 37.9 36.8 103 45.0 39.7 113 SAGE CREEK BASIN 7850 14.7 11.4 129 19.3 14.0 138 SOUTH BRUSH CREEK 8440 11.0 11.3 97 19.7 20.0 98 TOWER 10500 49.0 52.1 94 46.8 44.9 104 WEBBER SPRINGS 9250 28.2 25.3 111 35.2 31.0 114 WILLOW CREEK PASS 9540 20.0 14.2 141 18.9 15.6 121 ----- ----- Basin wide percent of average 109 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.5 28.3 83 26.2 26.8 98 CASPER MTN. 7900 14.7 17.3 85 17.4 19.4 90 DEADMAN HILL 10220 21.0 19.6 107 22.6 20.8 109 DEER PARK 9700 16.1 19.0 85 22.6 26.8 84 LAPRELE CREEK 8375 7.0 7.4 95 14.1 16.3 87 RENO HILL 8400 15.2 15.0 101 20.4 20.0 102 ROACH 9700 20.3 18.6 109 25.5 22.3 114 SAND LAKE 10050 33.1 36.9 90 34.3 29.1 118 SOUTH PASS 9040 14.6 18.1 81 19.6 22.6 87 WINDY PEAK 7900 7.4 5.2 142 12.3 13.4 92 ----- ----- Basin wide percent of average 93 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.6 4.9 176 18.8 18.5 102 DIVIDE PEAK 8880 23.6 19.6 120 26.7 24.2 110 OLD BATTLE 10000 37.9 36.8 103 45.0 39.7 113 SANDSTONE RS 8150 16.2 9.8 165 24.0 21.8 110 WHISKEY PARK 8950 38.7 30.6 126 40.2 33.6 120 ----- ----- Basin wide percent of average 123 112 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.3 13.7 97 15.0 15.8 95 BLIND BULL SUM 8650 27.4 28.0 98 19.5 25.1 78 EAST RIM DIVIDE 7930 8.7 13.3 65 12.4 13.8 90 ELKHART PARK G.S. 9400 11.5 13.0 88 13.2 15.9 83 GROS VENTRE SUMMIT 8750 13.3 13.4 99 15.7 15.2 103 GUNSIGHT PASS 9820 12.8 -M * 16.5 -M * KENDALL R.S. 7740 9.9 10.3 96 15.2 16.5 92 LOOMIS PARK 8240 14.4 14.6 99 19.8 19.9 99 NEW FORK LAKE 8340 8.1 8.7 93 10.6 13.3 80 SNIDER BASIN 8060 12.6 12.9 98 15.9 18.5 86 SPRING CREEK DIVIDE 9000 24.0 28.7 84 26.5 30.1 88 TRIPLE PEAK 8500 24.4 24.0 102 31.9 28.5 112 ----- ----- Basin wide percent of average 93 92 LOWER GREEN RIVER HAMS FORK 7840 9.8 6.3 156 11.8 14.7 80 HEWINTA 9519 11.2 9.5 118 19.3 17.7 109 HICKERSON PARK 9145 4.4 5.9 75 11.3 10.1 112 HOLE-IN-ROCK 9150 4.5 5.0 90 11.8 9.7 122 INDIAN CREEK 9425 26.9 28.5 94 -M 29.3 * KELLEY R.S. 8180 15.2 14.4 106 19.9 23.5 85 STEEL CREEK PARK 10200 19.1 18.6 103 21.2 20.1 105 ----- ----- Basin wide percent of average 103 99 UPPER BEAR RIVER BUG LAKE 7950 17.5 18.4 95 18.8 22.3 84 HAYDEN FORK 9212 14.8 13.3 111 26.1 25.0 104 KELLEY R.S. 8180 15.2 14.4 106 19.9 23.5 85 LILY LAKE 9156 14.3 11.4 125 20.3 21.0 97 MONTE CRISTO 8960 30.9 28.5 108 29.2 30.1 97 SALT RIVER SUMMIT 7760 -M 11.0 * -M 21.5 * TRIAL LAKE 9992 23.8 26.5 90 27.2 29.3 93 ----- ----- Basin wide percent of average 104 94 ----------------------------------------------------------------------------- -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.