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 22 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.5 15.4 81 21.3 23.5 91 COTTONWOOD CREEK 7670 26.9 22.7 119 34.7 30.5 114 GRAND TARGHEE 9260 49.4 -M * 38.3 -M * GRANITE CREEK 6770 15.0 15.7 96 23.2 21.6 107 GRASSY LAKE 7265 32.6 36.3 90 38.0 39.4 96 GROS VENTRE SUMMIT 8750 -M 14.4 * 17.4 14.5 120 GUNSIGHT PASS 9820 16.3 -M * 17.9 -M * LEWIS LAKE DIVIDE 7850 34.1 36.4 94 36.4 40.3 90 PHILLIPS BENCH 8200 30.0 30.6 98 33.0 31.9 103 SALT RIVER SUMMIT 7760 14.7 13.4 110 18.4 20.8 88 SNAKE RIVER STATION 6920 15.4 15.9 97 24.7 24.6 100 SPRING CREEK DIVIDE 9000 31.6 28.9 109 29.9 29.1 103 THUMB DIVIDE 7980 20.4 17.6 116 23.8 21.0 113 TOGWOTEE PASS 9580 30.0 27.3 110 32.6 27.6 118 TWO OCEAN PLATEAU 9240 41.4 31.3 132 32.1 30.7 105 WILLOW CREEK 8380 35.0 31.9 110 43.3 35.9 121 ----- ----- Basin wide percent of average 105 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 24.9 25.7 97 23.0 22.4 103 BLACK BEAR 8170 37.5 40.9 92 38.9 44.3 88 CANYON 7870 13.6 13.0 105 16.5 17.0 97 FISHER CREEK 9100 38.5 37.6 102 38.5 40.2 96 MADISON PLATEAU 7750 24.2 25.8 94 26.9 29.5 91 NORTHEAST ENTRANCE 7350 7.2 9.5 76 15.0 14.1 106 PARKER PEAK 9400 30.0 23.9 126 20.4 18.4 111 SYLVAN LAKE 8420 20.9 24.2 86 25.5 23.5 109 THUMB DIVIDE 7980 20.4 17.6 116 23.8 21.0 113 TWO OCEAN PLATEAU 9240 41.4 31.3 132 32.1 30.7 105 WHISKEY CREEK 6800 18.1 17.3 105 22.6 23.2 97 WHITE MILL 8700 26.2 26.3 100 26.3 29.9 88 WOLVERINE 7650 10.4 9.8 106 13.6 14.4 94 ----- ----- Basin wide percent of average 103 98 WIND RIVER BURROUGHS CREEK 8750 17.2 14.8 116 18.6 18.3 102 COLD SPRINGS 9630 8.6 5.8 148 12.7 12.7 100 DEER PARK 9700 14.6 17.9 82 20.4 25.1 81 HOBBS PARK 10100 16.3 17.1 95 17.2 15.5 111 LITTLE WARM 9370 12.1 12.1 100 16.4 15.6 105 SOUTH PASS 9040 15.3 17.9 85 17.8 21.2 84 ST. LAWRENCE ALT 8620 7.3 6.6 111 12.1 10.9 111 TOGWOTEE PASS 9580 30.0 27.3 110 32.6 27.6 118 TOWNSEND CREEK 8700 11.3 9.6 118 15.2 14.2 107 ----- ----- Basin wide percent of average 103 101 BIGHORN BASIN BALD MTN. 9380 19.4 22.6 86 16.9 19.9 85 BEAR TRAP MEADOW 8200 6.4 3.7 173 10.5 9.9 106 BLACKWATER 9780 27.8 27.4 101 25.5 23.4 109 BONE SPRINGS DIV 9350 16.9 17.8 95 15.8 17.0 93 EVENING STAR 9200 31.3 32.4 97 33.9 28.5 119 GRAVE SPRINGS 8550 10.0 11.0 91 11.5 12.0 96 KIRWIN 9550 14.5 12.5 116 16.4 13.1 125 MARQUETTE 8760 7.9 10.7 74 10.6 12.2 87 MIDDLE POWDER 7760 12.1 14.3 85 11.6 14.5 80 OWL CREEK 8975 5.0 4.7 106 7.7 7.3 105 POWDER RIVER PASS 9480 11.8 11.7 101 16.0 14.5 110 SHELL CREEK 9580 17.5 16.3 107 17.0 15.5 110 SYLVAN LAKE 8420 20.9 24.2 86 25.5 23.5 109 SYLVAN ROAD 7120 9.6 10.7 90 21.0 19.5 108 TIMBER CREEK 7950 4.7 5.2 90 9.4 9.2 102 YOUNTS PEAK 8350 19.5 18.2 107 17.7 18.0 98 ----- ----- Basin wide percent of average 97 103 SHOSHONE RIVER BLACKWATER 9780 27.8 27.4 101 25.5 23.4 109 EVENING STAR 9200 31.3 32.4 97 33.9 28.5 119 KIRWIN 9550 14.5 12.5 116 16.4 13.1 125 MARQUETTE 8760 7.9 10.7 74 10.6 12.2 87 SYLVAN LAKE 8420 20.9 24.2 86 25.5 23.5 109 SYLVAN ROAD 7120 9.6 10.7 90 21.0 19.5 108 YOUNTS PEAK 8350 19.5 18.2 107 17.7 18.0 98 ----- ----- Basin wide percent of average 97 109 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.4 3.7 173 10.5 9.9 106 BIG GOOSE 7990 11.1 12.5 89 14.8 11.5 129 BONE SPRINGS DIV 9350 16.9 17.8 95 15.8 17.0 93 BURGESS JUNCTION 7880 13.2 13.3 99 14.5 14.2 102 CLOUD PEAK RESERVOIR 9860 19.2 15.8 122 19.3 15.5 125 DOME LAKE 8880 13.4 13.8 97 17.5 15.5 113 GRAVE SPRINGS 8550 10.0 11.0 91 11.5 12.0 96 HANSEN SAWMILL 8360 5.5 5.6 98 11.5 9.9 116 MIDDLE POWDER 7760 12.1 14.3 85 11.6 14.5 80 POWDER RIVER PASS 9480 11.8 11.7 101 16.0 14.5 110 SUCKER CREEK 8880 15.8 13.5 117 19.0 16.0 119 TIE CREEK 6870 5.3 5.2 102 16.1 12.1 133 ----- ----- Basin wide percent of average 102 110 BELLE FOURCHE BLIND PARK 6890 1.5 6.8 22 15.8 13.0 122 COLE CANYON 5910 6.1 6.7 91 13.8 8.2 168 NORTH RAPID CREEK 6130 5.9 7.8 76 15.9 10.1 157 ----- ----- Basin wide percent of average 63 145 UPPER N. PLATTE RIVER COLUMBINE 9160 26.9 23.8 113 30.3 28.0 108 DIVIDE PEAK 8880 27.7 20.8 133 30.4 23.1 132 ELK RIVER 8700 22.2 18.5 120 24.6 21.9 112 JOE WRIGHT 10120 26.4 24.4 108 32.3 28.3 114 NORTH FRENCH CREEK 10130 38.2 33.6 114 35.6 27.9 128 OLD BATTLE 10000 39.1 35.6 110 44.1 38.1 116 SAGE CREEK BASIN 7850 14.8 12.1 122 17.0 13.4 127 SOUTH BRUSH CREEK 8440 12.2 12.8 95 19.9 18.8 106 TOWER 10500 48.6 50.8 96 46.9 43.0 109 WEBBER SPRINGS 9250 28.7 26.0 110 33.6 29.7 113 WILLOW CREEK PASS 9540 14.5 14.1 103 14.6 14.7 99 ----- ----- Basin wide percent of average 110 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.6 27.5 97 25.4 25.3 100 CASPER MTN. 7900 14.2 17.4 82 15.6 17.7 88 DEADMAN HILL 10220 21.5 19.0 113 21.7 19.5 111 DEER PARK 9700 14.6 17.9 82 20.4 25.1 81 LAPRELE CREEK 8375 8.8 9.3 95 15.1 15.0 101 RENO HILL 8400 16.9 16.0 106 19.7 18.4 107 ROACH 9700 19.2 18.5 104 22.3 21.1 106 SAND LAKE 10050 35.4 35.9 99 33.8 27.5 123 SOUTH PASS 9040 15.3 17.9 85 17.8 21.2 84 WINDY PEAK 7900 9.8 7.1 138 12.9 12.4 104 ----- ----- Basin wide percent of average 98 101 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 13.5 7.2 188 20.6 17.7 116 DIVIDE PEAK 8880 27.7 20.8 133 30.4 23.1 132 OLD BATTLE 10000 39.1 35.6 110 44.1 38.1 116 SANDSTONE RS 8150 19.7 12.4 159 23.1 20.7 112 WHISKEY PARK 8950 34.9 30.6 114 38.0 32.0 119 ----- ----- Basin wide percent of average 127 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.0 15.0 87 14.5 15.0 97 BLIND BULL SUM 8650 29.9 28.7 104 22.9 24.3 94 EAST RIM DIVIDE 7930 7.9 14.0 56 13.6 13.3 102 ELKHART PARK G.S. 9400 14.7 13.9 106 17.1 15.0 114 GROS VENTRE SUMMIT 8750 -M 14.4 * 17.4 14.5 120 GUNSIGHT PASS 9820 16.3 -M * 17.9 -M * KENDALL R.S. 7740 8.1 12.6 64 15.1 15.9 95 LOOMIS PARK 8240 15.1 16.3 93 20.8 19.1 109 NEW FORK LAKE 8340 10.5 10.6 99 12.5 12.6 99 SNIDER BASIN 8060 15.0 14.5 103 16.9 17.9 94 SPRING CREEK DIVIDE 9000 31.6 28.9 109 29.9 29.1 103 TRIPLE PEAK 8500 24.7 25.7 96 29.6 27.4 108 ----- ----- Basin wide percent of average 95 103 LOWER GREEN RIVER HAMS FORK 7840 10.2 8.7 117 14.3 13.9 103 HEWINTA 9519 11.7 11.6 101 15.7 16.8 93 HICKERSON PARK 9145 6.9 7.7 90 11.8 9.4 126 HOLE-IN-ROCK 9150 6.3 6.6 95 11.3 8.9 127 INDIAN CREEK 9425 27.1 29.6 92 25.6 28.3 90 KELLEY R.S. 8180 16.4 16.4 100 20.6 22.6 91 STEEL CREEK PARK 10200 17.1 17.8 96 19.2 19.1 101 ----- ----- Basin wide percent of average 97 100 UPPER BEAR RIVER BUG LAKE 7950 19.9 20.9 95 20.4 21.4 95 HAYDEN FORK 9212 16.8 15.6 108 25.1 23.9 105 KELLEY R.S. 8180 16.4 16.4 100 20.6 22.6 91 LILY LAKE 9156 15.1 13.6 111 19.6 20.0 98 MONTE CRISTO 8960 29.7 30.2 98 30.2 28.7 105 SALT RIVER SUMMIT 7760 14.7 13.4 110 18.4 20.8 88 TRIAL LAKE 9992 27.5 26.6 103 27.1 28.0 97 ----- ----- Basin wide percent of average 102 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.