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 FRIDAY: MAY 2 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 18.6 11.9 156 30.2 24.5 123 COTTONWOOD CREEK 7670 25.3 19.4 130 28.3 32.1 88 GRAND TARGHEE 9260 54.7 -M * 38.3 -M * GRANITE CREEK 6770 16.7 12.5 134 24.9 22.5 111 GRASSY LAKE 7265 39.4 33.0 119 47.8 41.0 117 GROS VENTRE SUMMIT 8750 13.6 13.1 104 15.9 15.3 104 GUNSIGHT PASS 9820 13.5 -M * 16.7 -M * LEWIS LAKE DIVIDE 7850 40.0 34.3 117 41.0 41.8 98 PHILLIPS BENCH 8200 35.3 29.2 121 38.5 33.2 116 SALT RIVER SUMMIT 7760 12.6 10.3 122 17.9 21.7 82 SNAKE RIVER STATION 6920 18.5 11.8 157 30.3 25.6 118 SPRING CREEK DIVIDE 9000 23.6 28.4 83 26.4 30.3 87 THUMB DIVIDE 7980 17.8 14.6 122 23.1 22.1 105 TOGWOTEE PASS 9580 30.3 28.0 108 33.6 29.1 115 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.2 * WILLOW CREEK 8380 33.1 30.4 109 43.5 37.9 115 ----- ----- Basin wide percent of average 117 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.8 25.9 107 26.6 23.6 113 BLACK BEAR 8170 48.5 39.8 122 47.4 46.0 103 CANYON 7870 18.3 11.0 166 23.3 17.8 131 FISHER CREEK 9100 44.6 37.7 118 42.8 42.1 102 MADISON PLATEAU 7750 32.7 24.0 136 35.8 30.5 117 NORTHEAST ENTRANCE 7350 9.0 6.7 134 15.3 14.9 103 PARKER PEAK 9400 31.0 24.5 127 -M 19.6 * SYLVAN LAKE 8420 22.2 23.5 94 29.9 24.8 121 THUMB DIVIDE 7980 17.8 14.6 122 23.1 22.1 105 TWO OCEAN PLATEAU 9240 -M 31.8 * -M 32.2 * WHISKEY CREEK 6800 20.7 14.9 139 27.7 24.3 114 WHITE MILL 8700 30.9 26.3 117 30.8 31.3 98 WOLVERINE 7650 8.9 6.9 129 15.5 15.3 101 ----- ----- Basin wide percent of average 122 109 WIND RIVER BURROUGHS CREEK 8750 16.8 13.4 125 20.8 19.4 107 COLD SPRINGS 9630 3.8 4.8 79 11.9 14.0 85 DEER PARK 9700 16.3 18.5 88 23.0 27.1 85 HOBBS PARK 10100 15.9 18.0 88 18.0 17.1 105 LITTLE WARM 9370 10.1 10.8 94 16.1 16.9 95 SOUTH PASS 9040 14.6 17.8 82 20.2 22.8 89 ST. LAWRENCE ALT 8620 4.7 6.0 78 10.0 12.2 82 TOGWOTEE PASS 9580 30.3 28.0 108 33.6 29.1 115 TOWNSEND CREEK 8700 8.6 8.8 98 14.7 15.6 94 ----- ----- Basin wide percent of average 96 97 BIGHORN BASIN BALD MTN. 9380 19.6 23.5 83 18.8 21.5 87 BEAR TRAP MEADOW 8200 7.6 2.3 330 11.6 11.0 105 BLACKWATER 9780 29.5 28.9 102 27.2 24.8 110 BONE SPRINGS DIV 9350 21.8 18.3 119 20.8 18.4 113 EVENING STAR 9200 33.3 33.3 100 38.2 30.0 127 GRAVE SPRINGS 8550 11.7 11.0 106 12.8 13.2 97 KIRWIN 9550 13.6 12.9 105 16.6 14.3 116 MARQUETTE 8760 9.0 11.2 80 12.4 13.8 90 MIDDLE POWDER 7760 14.8 14.2 104 12.2 15.9 77 OWL CREEK 8975 1.1 3.9 28 8.3 8.3 100 POWDER RIVER PASS 9480 13.1 10.5 125 17.3 15.9 109 SHELL CREEK 9580 19.0 16.8 113 18.6 16.9 110 SYLVAN LAKE 8420 22.2 23.5 94 29.9 24.8 121 SYLVAN ROAD 7120 10.5 7.8 135 23.4 20.6 114 TIMBER CREEK 7950 4.7 4.8 98 10.2 10.6 96 YOUNTS PEAK 8350 18.7 18.1 103 19.7 18.9 104 ----- ----- Basin wide percent of average 104 107 SHOSHONE RIVER BLACKWATER 9780 29.5 28.9 102 27.2 24.8 110 EVENING STAR 9200 33.3 33.3 100 38.2 30.0 127 KIRWIN 9550 13.6 12.9 105 16.6 14.3 116 MARQUETTE 8760 9.0 11.2 80 12.4 13.8 90 SYLVAN LAKE 8420 22.2 23.5 94 29.9 24.8 121 SYLVAN ROAD 7120 10.5 7.8 135 23.4 20.6 114 YOUNTS PEAK 8350 18.7 18.1 103 19.7 18.9 104 ----- ----- Basin wide percent of average 101 114 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.6 2.3 330 11.6 11.0 105 BIG GOOSE 7990 10.6 11.5 92 15.2 13.0 117 BONE SPRINGS DIV 9350 21.8 18.3 119 20.8 18.4 113 BURGESS JUNCTION 7880 16.2 13.1 124 17.8 15.5 115 CLOUD PEAK RESERVOIR 9860 18.8 16.2 116 19.1 17.3 110 DOME LAKE 8880 12.9 13.3 97 18.3 16.9 108 GRAVE SPRINGS 8550 11.7 11.0 106 12.8 13.2 97 HANSEN SAWMILL 8360 5.0 4.7 106 11.5 11.1 104 MIDDLE POWDER 7760 14.8 14.2 104 12.2 15.9 77 POWDER RIVER PASS 9480 13.1 10.5 125 17.3 15.9 109 SUCKER CREEK 8880 17.2 12.9 133 20.8 17.6 118 TIE CREEK 6870 7.3 3.9 187 15.1 13.6 111 ----- ----- Basin wide percent of average 119 107 BELLE FOURCHE BLIND PARK 6890 5.2 4.0 130 14.5 14.3 101 COLE CANYON 5910 6.1 4.5 136 11.1 9.6 116 NORTH RAPID CREEK 6130 8.6 3.4 253 13.1 11.5 114 ----- ----- Basin wide percent of average 167 109 UPPER N. PLATTE RIVER COLUMBINE 9160 25.2 20.5 123 32.4 29.3 111 DIVIDE PEAK 8880 23.7 19.0 125 27.4 24.4 112 ELK RIVER 8700 20.9 14.5 144 26.5 23.2 114 JOE WRIGHT 10120 27.9 25.1 111 33.3 30.3 110 NORTH FRENCH CREEK 10130 33.6 34.5 97 34.7 29.9 116 OLD BATTLE 10000 38.2 37.0 103 45.3 40.1 113 SAGE CREEK BASIN 7850 14.2 11.0 129 19.6 14.2 138 SOUTH BRUSH CREEK 8440 10.4 10.8 96 19.7 20.3 97 TOWER 10500 48.9 52.3 93 -M 45.3 * WEBBER SPRINGS 9250 28.2 24.8 114 35.8 31.3 114 WILLOW CREEK PASS 9540 20.9 14.1 148 19.5 15.8 123 ----- ----- Basin wide percent of average 111 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.0 28.1 82 26.4 27.1 97 CASPER MTN. 7900 15.5 16.9 92 18.3 19.7 93 DEADMAN HILL 10220 20.8 19.7 106 23.4 21.1 111 DEER PARK 9700 16.3 18.5 88 23.0 27.1 85 LAPRELE CREEK 8375 6.9 6.9 100 14.7 16.6 89 RENO HILL 8400 16.7 14.5 115 21.9 20.4 107 ROACH 9700 20.7 18.3 113 26.3 22.6 116 SAND LAKE 10050 33.3 37.0 90 34.7 29.5 118 SOUTH PASS 9040 14.6 17.8 82 20.2 22.8 89 WINDY PEAK 7900 7.2 4.7 153 12.8 13.6 94 ----- ----- Basin wide percent of average 96 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.4 4.3 195 19.4 18.7 104 DIVIDE PEAK 8880 23.7 19.0 125 27.4 24.4 112 OLD BATTLE 10000 38.2 37.0 103 45.3 40.1 113 SANDSTONE RS 8150 15.6 9.1 171 24.5 22.0 111 WHISKEY PARK 8950 38.7 30.4 127 -M 34.0 * ----- ----- Basin wide percent of average 125 111 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.9 13.2 98 14.9 16.0 93 BLIND BULL SUM 8650 27.4 27.7 99 19.6 25.3 77 EAST RIM DIVIDE 7930 8.5 13.0 65 12.4 14.0 89 ELKHART PARK G.S. 9400 11.3 12.6 90 13.0 16.1 81 GROS VENTRE SUMMIT 8750 13.6 13.1 104 15.9 15.3 104 GUNSIGHT PASS 9820 13.5 -M * 16.7 -M * KENDALL R.S. 7740 9.7 9.6 101 15.2 16.6 92 LOOMIS PARK 8240 13.9 14.0 99 19.8 20.0 99 NEW FORK LAKE 8340 7.9 8.2 96 10.4 13.5 77 SNIDER BASIN 8060 12.4 12.4 100 15.7 18.6 84 SPRING CREEK DIVIDE 9000 23.6 28.4 83 26.4 30.3 87 TRIPLE PEAK 8500 24.4 23.4 104 31.9 28.8 111 ----- ----- Basin wide percent of average 94 91 LOWER GREEN RIVER HAMS FORK 7840 9.8 5.6 175 11.8 14.8 80 HEWINTA 9519 11.2 9.0 124 19.3 17.9 108 HICKERSON PARK 9145 4.1 5.4 76 11.0 10.3 107 HOLE-IN-ROCK 9150 4.0 4.5 89 11.7 9.8 119 INDIAN CREEK 9425 27.0 28.1 96 -M 29.6 * KELLEY R.S. 8180 14.9 13.8 108 19.9 23.7 84 STEEL CREEK PARK 10200 19.4 18.7 104 21.5 20.3 106 ----- ----- Basin wide percent of average 106 98 UPPER BEAR RIVER BUG LAKE 7950 18.4 17.6 105 18.6 22.5 83 HAYDEN FORK 9212 15.4 12.6 122 26.2 25.3 104 KELLEY R.S. 8180 14.9 13.8 108 19.9 23.7 84 LILY LAKE 9156 14.1 10.8 131 20.3 21.2 96 MONTE CRISTO 8960 30.8 28.0 110 29.4 30.4 97 SALT RIVER SUMMIT 7760 12.6 10.3 122 17.9 21.7 82 TRIAL LAKE 9992 24.2 26.4 92 27.5 29.6 93 ----- ----- Basin wide percent of average 109 92 ----------------------------------------------------------------------------- -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.