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 THURSDAY: MAY 1 , 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 12.3 * -M 24.4 * COTTONWOOD CREEK 7670 25.3 19.8 128 28.2 31.9 88 GRAND TARGHEE 9260 54.5 -M * 38.1 -M * GRANITE CREEK 6770 16.6 12.8 130 24.9 22.4 111 GRASSY LAKE 7265 39.2 33.4 117 47.7 40.9 117 GROS VENTRE SUMMIT 8750 13.4 13.3 101 15.8 15.3 103 GUNSIGHT PASS 9820 13.0 -M * 16.7 -M * LEWIS LAKE DIVIDE 7850 39.8 34.6 115 41.0 41.6 99 PHILLIPS BENCH 8200 35.5 29.4 121 38.5 33.1 116 SALT RIVER SUMMIT 7760 -M 10.6 * -M 21.6 * SNAKE RIVER STATION 6920 18.3 12.2 150 30.3 25.5 119 SPRING CREEK DIVIDE 9000 23.9 28.6 84 26.4 30.2 87 THUMB DIVIDE 7980 17.7 14.9 119 23.0 22.0 105 TOGWOTEE PASS 9580 30.2 27.9 108 33.4 29.0 115 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.1 * WILLOW CREEK 8380 33.1 30.6 108 43.5 37.7 115 ----- ----- Basin wide percent of average 114 107 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 28.0 25.9 108 26.6 23.5 113 BLACK BEAR 8170 49.3 39.9 124 47.4 45.8 103 CANYON 7870 18.3 11.3 162 23.2 17.7 131 FISHER CREEK 9100 44.7 37.8 118 42.6 41.9 102 MADISON PLATEAU 7750 32.8 24.2 136 35.8 30.4 118 NORTHEAST ENTRANCE 7350 9.1 7.1 128 15.3 14.8 103 PARKER PEAK 9400 31.1 24.5 127 27.1 19.5 139 SYLVAN LAKE 8420 22.2 23.8 93 29.8 24.7 121 THUMB DIVIDE 7980 17.7 14.9 119 23.0 22.0 105 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.1 * WHISKEY CREEK 6800 20.7 15.2 136 27.6 24.2 114 WHITE MILL 8700 30.8 26.4 117 30.7 31.2 98 WOLVERINE 7650 9.2 7.2 128 15.5 15.2 102 ----- ----- Basin wide percent of average 122 111 WIND RIVER BURROUGHS CREEK 8750 16.6 13.6 122 20.7 19.3 107 COLD SPRINGS 9630 3.7 4.8 77 11.8 13.9 85 DEER PARK 9700 15.9 18.6 85 22.6 27.0 84 HOBBS PARK 10100 15.1 18.0 84 17.3 16.9 102 LITTLE WARM 9370 10.0 11.1 90 16.0 16.8 95 SOUTH PASS 9040 14.3 18.0 79 19.7 22.7 87 ST. LAWRENCE ALT 8620 4.5 6.1 74 9.7 12.1 80 TOGWOTEE PASS 9580 30.2 27.9 108 33.4 29.0 115 TOWNSEND CREEK 8700 8.1 9.1 89 14.2 15.5 92 ----- ----- Basin wide percent of average 93 95 BIGHORN BASIN BALD MTN. 9380 18.8 23.6 80 18.1 21.3 85 BEAR TRAP MEADOW 8200 7.4 2.5 296 11.4 10.9 105 BLACKWATER 9780 29.3 28.8 102 27.1 24.7 110 BONE SPRINGS DIV 9350 21.1 18.3 115 20.5 18.3 112 EVENING STAR 9200 33.0 33.3 99 38.0 29.9 127 GRAVE SPRINGS 8550 11.2 11.1 101 12.3 13.1 94 KIRWIN 9550 13.5 13.0 104 16.4 14.2 115 MARQUETTE 8760 8.8 11.3 78 12.0 13.7 88 MIDDLE POWDER 7760 14.4 14.3 101 11.9 15.8 75 OWL CREEK 8975 1.3 4.0 32 8.3 8.2 101 POWDER RIVER PASS 9480 12.8 10.7 120 17.2 15.8 109 SHELL CREEK 9580 18.5 16.8 110 18.4 16.8 110 SYLVAN LAKE 8420 22.2 23.8 93 29.8 24.7 121 SYLVAN ROAD 7120 10.5 8.1 130 23.4 20.5 114 TIMBER CREEK 7950 4.7 4.8 98 10.1 10.5 96 YOUNTS PEAK 8350 18.7 18.1 103 19.6 18.8 104 ----- ----- Basin wide percent of average 102 106 SHOSHONE RIVER BLACKWATER 9780 29.3 28.8 102 27.1 24.7 110 EVENING STAR 9200 33.0 33.3 99 38.0 29.9 127 KIRWIN 9550 13.5 13.0 104 16.4 14.2 115 MARQUETTE 8760 8.8 11.3 78 12.0 13.7 88 SYLVAN LAKE 8420 22.2 23.8 93 29.8 24.7 121 SYLVAN ROAD 7120 10.5 8.1 130 23.4 20.5 114 YOUNTS PEAK 8350 18.7 18.1 103 19.6 18.8 104 ----- ----- Basin wide percent of average 100 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.4 2.5 296 11.4 10.9 105 BIG GOOSE 7990 10.1 11.6 87 15.0 12.9 116 BONE SPRINGS DIV 9350 21.1 18.3 115 20.5 18.3 112 BURGESS JUNCTION 7880 15.1 13.3 114 16.8 15.4 109 CLOUD PEAK RESERVOIR 9860 18.0 16.2 111 18.6 17.1 109 DOME LAKE 8880 12.4 13.5 92 17.9 16.8 107 GRAVE SPRINGS 8550 11.2 11.1 101 12.3 13.1 94 HANSEN SAWMILL 8360 4.9 4.9 100 11.5 11.0 105 MIDDLE POWDER 7760 14.4 14.3 101 11.9 15.8 75 POWDER RIVER PASS 9480 12.8 10.7 120 17.2 15.8 109 SUCKER CREEK 8880 16.2 13.1 124 20.1 17.4 116 TIE CREEK 6870 6.5 3.9 167 14.3 13.5 106 ----- ----- Basin wide percent of average 113 105 BELLE FOURCHE BLIND PARK 6890 4.8 4.0 120 13.8 14.2 97 COLE CANYON 5910 4.6 5.0 92 9.9 9.5 104 NORTH RAPID CREEK 6130 7.6 3.8 200 12.0 11.4 105 ----- ----- Basin wide percent of average 133 102 UPPER N. PLATTE RIVER COLUMBINE 9160 24.9 20.9 119 32.1 29.2 110 DIVIDE PEAK 8880 23.3 19.3 121 26.9 24.3 111 ELK RIVER 8700 20.5 15.0 137 26.1 23.0 113 JOE WRIGHT 10120 26.8 25.1 107 32.2 30.1 107 NORTH FRENCH CREEK 10130 33.7 34.5 98 34.5 29.7 116 OLD BATTLE 10000 37.8 36.9 102 45.0 39.9 113 SAGE CREEK BASIN 7850 13.6 11.2 121 19.4 14.1 138 SOUTH BRUSH CREEK 8440 10.2 11.1 92 19.7 20.1 98 TOWER 10500 48.8 52.2 93 46.9 45.1 104 WEBBER SPRINGS 9250 27.6 25.1 110 35.4 31.1 114 WILLOW CREEK PASS 9540 20.0 14.2 141 19.0 15.7 121 ----- ----- Basin wide percent of average 108 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.9 28.2 81 26.3 27.0 97 CASPER MTN. 7900 14.7 17.1 86 17.7 19.5 91 DEADMAN HILL 10220 20.1 19.7 102 22.7 21.0 108 DEER PARK 9700 15.9 18.6 85 22.6 27.0 84 LAPRELE CREEK 8375 6.5 7.1 92 14.1 16.5 85 RENO HILL 8400 15.2 14.7 103 20.5 20.2 101 ROACH 9700 19.7 18.5 106 25.4 22.4 113 SAND LAKE 10050 32.7 37.0 88 34.2 29.3 117 SOUTH PASS 9040 14.3 18.0 79 19.7 22.7 87 WINDY PEAK 7900 6.8 4.9 139 12.5 13.5 93 ----- ----- Basin wide percent of average 92 98 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 7.9 4.6 172 18.9 18.6 102 DIVIDE PEAK 8880 23.3 19.3 121 26.9 24.3 111 OLD BATTLE 10000 37.8 36.9 102 45.0 39.9 113 SANDSTONE RS 8150 15.5 9.5 163 24.1 21.9 110 WHISKEY PARK 8950 38.3 30.5 126 40.4 33.8 120 ----- ----- Basin wide percent of average 122 112 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.1 13.5 97 15.0 15.9 94 BLIND BULL SUM 8650 27.3 27.9 98 19.6 25.2 78 EAST RIM DIVIDE 7930 8.6 13.1 66 12.4 13.9 89 ELKHART PARK G.S. 9400 11.4 12.8 89 13.2 16.0 82 GROS VENTRE SUMMIT 8750 13.4 13.3 101 15.8 15.3 103 GUNSIGHT PASS 9820 13.0 -M * 16.7 -M * KENDALL R.S. 7740 9.8 10.0 98 15.1 16.6 91 LOOMIS PARK 8240 14.0 14.3 98 19.8 19.9 99 NEW FORK LAKE 8340 7.8 8.4 93 10.4 13.4 78 SNIDER BASIN 8060 12.5 12.6 99 15.7 18.5 85 SPRING CREEK DIVIDE 9000 23.9 28.6 84 26.4 30.2 87 TRIPLE PEAK 8500 24.4 23.7 103 31.9 28.6 112 ----- ----- Basin wide percent of average 93 91 LOWER GREEN RIVER HAMS FORK 7840 9.6 6.0 160 11.8 14.7 80 HEWINTA 9519 11.0 9.3 118 19.3 17.8 108 HICKERSON PARK 9145 4.2 5.7 74 11.0 10.2 108 HOLE-IN-ROCK 9150 4.2 4.7 89 11.8 9.7 122 INDIAN CREEK 9425 26.7 28.3 94 -M 29.5 * KELLEY R.S. 8180 14.9 14.1 106 19.9 23.6 84 STEEL CREEK PARK 10200 19.3 18.6 104 21.3 20.2 105 ----- ----- Basin wide percent of average 104 99 UPPER BEAR RIVER BUG LAKE 7950 17.7 18.0 98 18.6 22.4 83 HAYDEN FORK 9212 15.2 13.0 117 26.1 25.1 104 KELLEY R.S. 8180 14.9 14.1 106 19.9 23.6 84 LILY LAKE 9156 14.1 11.1 127 20.2 21.1 96 MONTE CRISTO 8960 30.5 28.3 108 29.2 30.3 96 SALT RIVER SUMMIT 7760 -M 10.6 * -M 21.6 * TRIAL LAKE 9992 24.0 26.5 91 27.3 29.4 93 ----- ----- Basin wide percent of average 105 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.