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: APRIL 30 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.2 13.0 78 22.1 24.2 91 COTTONWOOD CREEK 7670 27.8 20.4 136 36.5 31.7 115 GRAND TARGHEE 9260 52.3 -M * 40.0 -M * GRANITE CREEK 6770 12.5 13.5 93 23.7 22.2 107 GRASSY LAKE 7265 32.1 34.1 94 39.8 40.6 98 GROS VENTRE SUMMIT 8750 13.2 13.6 97 18.1 15.1 120 GUNSIGHT PASS 9820 16.9 -M * 19.2 -M * LEWIS LAKE DIVIDE 7850 35.2 35.1 100 38.2 41.4 92 PHILLIPS BENCH 8200 30.3 29.8 102 33.9 32.9 103 SALT RIVER SUMMIT 7760 13.8 11.3 122 19.3 21.4 90 SNAKE RIVER STATION 6920 13.0 13.0 100 26.4 25.3 104 SPRING CREEK DIVIDE 9000 32.2 28.7 112 31.2 30.0 104 THUMB DIVIDE 7980 20.4 15.6 131 25.1 21.8 115 TOGWOTEE PASS 9580 31.0 27.8 112 34.0 28.7 118 TWO OCEAN PLATEAU 9240 43.8 31.8 138 34.1 31.8 107 WILLOW CREEK 8380 35.2 31.0 114 45.8 37.3 123 ----- ----- Basin wide percent of average 110 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 26.2 25.9 101 24.2 23.3 104 BLACK BEAR 8170 39.9 40.3 99 41.2 45.5 91 CANYON 7870 14.6 11.6 126 18.4 17.6 105 FISHER CREEK 9100 39.7 37.8 105 39.7 41.6 95 MADISON PLATEAU 7750 25.6 24.6 104 29.2 30.2 97 NORTHEAST ENTRANCE 7350 5.6 7.6 74 15.7 14.6 108 PARKER PEAK 9400 31.6 24.5 129 22.2 19.3 115 SYLVAN LAKE 8420 21.8 23.9 91 27.5 24.5 112 THUMB DIVIDE 7980 20.4 15.6 131 25.1 21.8 115 TWO OCEAN PLATEAU 9240 43.8 31.8 138 34.1 31.8 107 WHISKEY CREEK 6800 18.7 15.6 120 24.2 24.0 101 WHITE MILL 8700 27.0 26.4 102 27.3 30.9 88 WOLVERINE 7650 9.2 7.6 121 14.6 15.0 97 ----- ----- Basin wide percent of average 111 101 WIND RIVER BURROUGHS CREEK 8750 18.2 13.9 131 20.1 19.1 105 COLD SPRINGS 9630 9.7 4.7 206 14.8 13.7 108 DEER PARK 9700 15.3 19.0 81 21.9 26.6 82 HOBBS PARK 10100 18.6 17.9 104 20.0 16.6 120 LITTLE WARM 9370 13.5 11.3 119 18.6 16.6 112 SOUTH PASS 9040 15.7 18.1 87 19.5 22.4 87 ST. LAWRENCE ALT 8620 8.1 6.3 129 14.3 11.9 120 TOGWOTEE PASS 9580 31.0 27.8 112 34.0 28.7 118 TOWNSEND CREEK 8700 11.6 9.3 125 17.2 15.2 113 ----- ----- Basin wide percent of average 110 106 BIGHORN BASIN BALD MTN. 9380 20.2 23.5 86 17.7 21.0 84 BEAR TRAP MEADOW 8200 5.5 2.7 204 11.4 10.7 107 BLACKWATER 9780 29.3 28.6 102 27.0 24.5 110 BONE SPRINGS DIV 9350 17.6 18.2 97 16.7 18.0 93 EVENING STAR 9200 31.9 33.2 96 35.5 29.6 120 GRAVE SPRINGS 8550 9.5 11.0 86 12.0 12.9 93 KIRWIN 9550 15.3 13.0 118 17.9 14.0 128 MARQUETTE 8760 8.7 11.2 78 12.2 13.4 91 MIDDLE POWDER 7760 11.8 14.6 81 12.2 15.6 78 OWL CREEK 8975 4.7 4.0 118 9.4 8.0 118 POWDER RIVER PASS 9480 12.2 11.0 111 17.6 15.6 113 SHELL CREEK 9580 18.0 16.9 107 18.0 16.5 109 SYLVAN LAKE 8420 21.8 23.9 91 27.5 24.5 112 SYLVAN ROAD 7120 7.2 8.7 83 22.2 20.3 109 TIMBER CREEK 7950 4.7 4.9 96 11.2 10.2 110 YOUNTS PEAK 8350 20.1 18.1 111 18.8 18.6 101 ----- ----- Basin wide percent of average 98 105 SHOSHONE RIVER BLACKWATER 9780 29.3 28.6 102 27.0 24.5 110 EVENING STAR 9200 31.9 33.2 96 35.5 29.6 120 KIRWIN 9550 15.3 13.0 118 17.9 14.0 128 MARQUETTE 8760 8.7 11.2 78 12.2 13.4 91 SYLVAN LAKE 8420 21.8 23.9 91 27.5 24.5 112 SYLVAN ROAD 7120 7.2 8.7 83 22.2 20.3 109 YOUNTS PEAK 8350 20.1 18.1 111 18.8 18.6 101 ----- ----- Basin wide percent of average 98 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.5 2.7 204 11.4 10.7 107 BIG GOOSE 7990 10.9 11.9 92 15.5 12.6 123 BONE SPRINGS DIV 9350 17.6 18.2 97 16.7 18.0 93 BURGESS JUNCTION 7880 13.5 13.4 101 15.2 15.2 100 CLOUD PEAK RESERVOIR 9860 19.2 16.3 118 20.2 16.8 120 DOME LAKE 8880 12.6 13.7 92 18.3 16.5 111 GRAVE SPRINGS 8550 9.5 11.0 86 12.0 12.9 93 HANSEN SAWMILL 8360 3.5 5.0 70 12.2 10.8 113 MIDDLE POWDER 7760 11.8 14.6 81 12.2 15.6 78 POWDER RIVER PASS 9480 12.2 11.0 111 17.6 15.6 113 SUCKER CREEK 8880 15.8 13.3 119 20.2 17.1 118 TIE CREEK 6870 4.1 4.2 98 17.1 13.2 130 ----- ----- Basin wide percent of average 101 108 BELLE FOURCHE BLIND PARK 6890 .0 4.3 0 17.1 13.9 123 COLE CANYON 5910 5.0 5.4 93 14.8 9.2 161 NORTH RAPID CREEK 6130 3.0 4.7 64 16.9 11.1 152 ----- ----- Basin wide percent of average 56 143 UPPER N. PLATTE RIVER COLUMBINE 9160 20.0 21.6 93 31.1 28.9 108 DIVIDE PEAK 8880 26.8 19.8 135 32.1 24.0 134 ELK RIVER 8700 14.6 15.8 92 25.0 22.8 110 JOE WRIGHT 10120 26.7 25.0 107 33.1 29.7 111 NORTH FRENCH CREEK 10130 38.9 34.4 113 37.3 29.3 127 OLD BATTLE 10000 39.8 36.6 109 45.8 39.5 116 SAGE CREEK BASIN 7850 12.2 11.5 106 18.4 13.9 132 SOUTH BRUSH CREEK 8440 10.1 11.5 88 21.3 19.9 107 TOWER 10500 49.6 52.0 95 48.4 44.7 108 WEBBER SPRINGS 9250 26.6 25.5 104 34.7 30.9 112 WILLOW CREEK PASS 9540 13.7 14.3 96 15.1 15.5 97 ----- ----- Basin wide percent of average 104 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.1 28.3 92 26.4 26.6 99 CASPER MTN. 7900 14.5 17.4 83 17.5 19.2 91 DEADMAN HILL 10220 21.8 19.6 111 22.7 20.7 110 DEER PARK 9700 15.3 19.0 81 21.9 26.6 82 LAPRELE CREEK 8375 9.3 7.6 122 16.4 16.2 101 RENO HILL 8400 16.0 15.2 105 21.0 19.9 106 ROACH 9700 18.6 18.6 100 23.3 22.2 105 SAND LAKE 10050 36.2 36.8 98 35.2 29.0 121 SOUTH PASS 9040 15.7 18.1 87 19.5 22.4 87 WINDY PEAK 7900 9.3 5.4 172 14.4 13.3 108 ----- ----- Basin wide percent of average 98 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 5.6 5.1 110 21.7 18.4 118 DIVIDE PEAK 8880 26.8 19.8 135 32.1 24.0 134 OLD BATTLE 10000 39.8 36.6 109 45.8 39.5 116 SANDSTONE RS 8150 15.7 10.2 154 24.1 21.7 111 WHISKEY PARK 8950 32.4 30.6 106 39.1 33.5 117 ----- ----- Basin wide percent of average 118 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.8 13.9 92 15.4 15.7 98 BLIND BULL SUM 8650 30.1 28.1 107 23.6 25.0 94 EAST RIM DIVIDE 7930 5.6 13.4 42 14.0 13.8 101 ELKHART PARK G.S. 9400 14.7 13.1 112 17.6 15.8 111 GROS VENTRE SUMMIT 8750 13.2 13.6 97 18.1 15.1 120 GUNSIGHT PASS 9820 16.9 -M * 19.2 -M * KENDALL R.S. 7740 6.5 10.6 61 16.0 16.4 98 LOOMIS PARK 8240 13.6 14.8 92 21.3 19.8 108 NEW FORK LAKE 8340 9.3 9.0 103 12.9 13.2 98 SNIDER BASIN 8060 13.5 13.1 103 17.3 18.4 94 SPRING CREEK DIVIDE 9000 32.2 28.7 112 31.2 30.0 104 TRIPLE PEAK 8500 23.8 24.3 98 30.9 28.4 109 ----- ----- Basin wide percent of average 96 103 LOWER GREEN RIVER HAMS FORK 7840 7.1 6.6 108 14.7 14.6 101 HEWINTA 9519 6.3 9.8 64 16.6 17.6 94 HICKERSON PARK 9145 4.7 6.2 76 12.9 10.0 129 HOLE-IN-ROCK 9150 5.0 5.2 96 12.4 9.6 129 INDIAN CREEK 9425 -M 28.7 * 25.9 29.2 89 KELLEY R.S. 8180 15.2 14.7 103 21.1 23.4 90 STEEL CREEK PARK 10200 16.8 18.5 91 20.3 20.0 102 ----- ----- Basin wide percent of average 90 100 UPPER BEAR RIVER BUG LAKE 7950 18.2 18.8 97 20.9 22.2 94 HAYDEN FORK 9212 13.2 13.6 97 26.2 24.9 105 KELLEY R.S. 8180 15.2 14.7 103 21.1 23.4 90 LILY LAKE 9156 12.7 11.7 109 20.9 20.9 100 MONTE CRISTO 8960 27.7 28.8 96 31.2 30.0 104 SALT RIVER SUMMIT 7760 13.8 11.3 122 19.3 21.4 90 TRIAL LAKE 9992 26.3 26.5 99 28.1 29.1 97 ----- ----- Basin wide percent of average 101 98 ----------------------------------------------------------------------------- -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.