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 1 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.7 18.1 87 19.2 21.6 89 COTTONWOOD CREEK 7670 26.9 24.1 112 30.1 27.6 109 GRAND TARGHEE 9260 42.8 -M * 33.2 -M * GRANITE CREEK 6770 16.6 18.7 89 20.7 20.1 103 GRASSY LAKE 7265 31.8 36.0 88 34.1 36.2 94 GROS VENTRE SUMMIT 8750 -M 14.3 * 15.7 13.0 121 GUNSIGHT PASS 9820 15.0 -M * 15.9 -M * LEWIS LAKE DIVIDE 7850 -M 35.7 * -M 37.0 * PHILLIPS BENCH 8200 27.7 29.1 95 29.0 29.2 99 SALT RIVER SUMMIT 7760 14.9 14.6 102 16.1 18.9 85 SNAKE RIVER STATION 6920 16.9 19.2 88 21.9 22.4 98 SPRING CREEK DIVIDE 9000 27.2 26.8 101 26.3 26.6 99 THUMB DIVIDE 7980 19.3 19.2 101 20.2 19.0 106 TOGWOTEE PASS 9580 27.4 25.0 110 29.5 24.7 119 TWO OCEAN PLATEAU 9240 38.1 28.2 135 29.5 27.9 106 WILLOW CREEK 8380 34.2 30.5 112 38.7 32.4 119 ----- ----- Basin wide percent of average 102 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.3 23.5 99 21.2 20.2 105 BLACK BEAR 8170 36.3 39.6 92 35.1 40.7 86 CANYON 7870 13.6 13.9 98 14.7 15.5 95 FISHER CREEK 9100 36.8 35.3 104 35.7 36.6 98 MADISON PLATEAU 7750 22.4 25.4 88 24.0 26.9 89 NORTHEAST ENTRANCE 7350 11.2 11.3 99 13.7 12.7 108 PARKER PEAK 9400 26.2 21.8 120 19.6 16.3 120 SYLVAN LAKE 8420 20.5 22.7 90 22.6 21.0 108 THUMB DIVIDE 7980 19.3 19.2 101 20.2 19.0 106 TWO OCEAN PLATEAU 9240 38.1 28.2 135 29.5 27.9 106 WHISKEY CREEK 6800 16.5 17.4 95 19.9 21.1 94 WHITE MILL 8700 24.7 24.5 101 -M 27.2 * WOLVERINE 7650 11.9 11.6 103 12.1 12.8 95 ----- ----- Basin wide percent of average 102 99 WIND RIVER BURROUGHS CREEK 8750 15.7 14.8 106 16.1 16.3 99 COLD SPRINGS 9630 7.7 9.0 86 10.2 10.6 96 DEER PARK 9700 10.9 17.0 64 15.6 21.9 71 HOBBS PARK 10100 12.7 15.0 85 12.7 12.8 99 LITTLE WARM 9370 12.1 12.0 101 14.8 13.4 110 SOUTH PASS 9040 12.0 16.7 72 14.3 18.5 77 ST. LAWRENCE ALT 8620 5.7 7.4 77 9.0 8.8 102 TOGWOTEE PASS 9580 27.4 25.0 110 29.5 24.7 119 TOWNSEND CREEK 8700 8.4 8.7 97 11.0 11.6 95 ----- ----- Basin wide percent of average 90 96 BIGHORN BASIN BALD MTN. 9380 18.9 19.7 96 15.2 17.4 87 BEAR TRAP MEADOW 8200 9.3 5.2 179 9.8 8.2 120 BLACKWATER 9780 25.0 24.8 101 22.6 20.6 110 BONE SPRINGS DIV 9350 17.5 16.3 107 14.4 14.6 99 EVENING STAR 9200 30.1 30.0 100 30.9 25.4 122 GRAVE SPRINGS 8550 9.6 9.4 102 10.2 9.6 106 KIRWIN 9550 12.8 11.4 112 14.1 11.2 126 MARQUETTE 8760 6.6 9.0 73 8.5 9.7 88 MIDDLE POWDER 7760 11.6 11.8 98 10.1 12.3 82 OWL CREEK 8975 5.6 5.6 100 5.5 5.8 95 POWDER RIVER PASS 9480 12.6 10.9 116 14.6 12.3 119 SHELL CREEK 9580 16.9 14.8 114 16.0 13.3 120 SYLVAN LAKE 8420 20.5 22.7 90 22.6 21.0 108 SYLVAN ROAD 7120 14.1 12.9 109 18.9 17.7 107 TIMBER CREEK 7950 4.8 5.8 83 8.3 7.3 114 YOUNTS PEAK 8350 18.2 17.2 106 16.1 16.2 99 ----- ----- Basin wide percent of average 103 107 SHOSHONE RIVER BLACKWATER 9780 25.0 24.8 101 22.6 20.6 110 EVENING STAR 9200 30.1 30.0 100 30.9 25.4 122 KIRWIN 9550 12.8 11.4 112 14.1 11.2 126 MARQUETTE 8760 6.6 9.0 73 8.5 9.7 88 SYLVAN LAKE 8420 20.5 22.7 90 22.6 21.0 108 SYLVAN ROAD 7120 14.1 12.9 109 18.9 17.7 107 YOUNTS PEAK 8350 18.2 17.2 106 16.1 16.2 99 ----- ----- Basin wide percent of average 99 110 POWDER-TONGUE BEAR TRAP MEADOW 8200 9.3 5.2 179 9.8 8.2 120 BIG GOOSE 7990 10.1 10.6 95 12.3 8.4 146 BONE SPRINGS DIV 9350 17.5 16.3 107 14.4 14.6 99 BURGESS JUNCTION 7880 12.5 11.7 107 12.8 12.1 106 CLOUD PEAK RESERVOIR 9860 17.3 13.4 129 15.9 12.8 124 DOME LAKE 8880 13.1 12.4 106 15.4 13.1 118 GRAVE SPRINGS 8550 9.6 9.4 102 10.2 9.6 106 HANSEN SAWMILL 8360 6.7 6.4 105 9.8 8.1 121 MIDDLE POWDER 7760 11.6 11.8 98 10.1 12.3 82 POWDER RIVER PASS 9480 12.6 10.9 116 14.6 12.3 119 SUCKER CREEK 8880 14.6 11.8 124 16.7 13.5 124 TIE CREEK 6870 5.9 5.9 100 13.4 9.8 137 ----- ----- Basin wide percent of average 112 115 BELLE FOURCHE BLIND PARK 6890 7.3 8.7 84 14.8 11.0 135 COLE CANYON 5910 7.1 6.8 104 12.2 6.7 182 NORTH RAPID CREEK 6130 10.1 8.2 123 14.3 8.6 166 ----- ----- Basin wide percent of average 103 157 UPPER N. PLATTE RIVER COLUMBINE 9160 27.0 25.0 108 26.7 25.2 106 DIVIDE PEAK 8880 24.0 19.9 121 25.3 20.7 122 ELK RIVER 8700 22.2 19.5 114 21.7 19.6 111 JOE WRIGHT 10120 23.6 21.3 111 27.4 24.7 111 NORTH FRENCH CREEK 10130 35.0 29.3 119 31.8 24.6 129 OLD BATTLE 10000 33.6 32.3 104 37.9 34.6 110 SAGE CREEK BASIN 7850 11.9 11.5 103 14.2 12.0 118 SOUTH BRUSH CREEK 8440 13.2 13.1 101 17.2 16.3 106 TOWER 10500 44.9 45.6 98 42.2 38.4 110 WEBBER SPRINGS 9250 25.2 26.3 96 28.4 26.7 106 WILLOW CREEK PASS 9540 12.4 12.0 103 12.3 12.8 96 ----- ----- Basin wide percent of average 107 112 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.4 23.7 99 21.2 22.0 96 CASPER MTN. 7900 12.2 14.4 85 13.3 14.3 93 DEADMAN HILL 10220 16.3 16.3 100 16.6 16.8 99 DEER PARK 9700 10.9 17.0 64 15.6 21.9 71 LAPRELE CREEK 8375 9.2 10.9 84 11.4 12.5 91 RENO HILL 8400 14.3 14.2 101 15.2 14.8 103 ROACH 9700 14.7 17.0 86 17.2 18.6 92 SAND LAKE 10050 30.5 32.5 94 28.3 24.0 118 SOUTH PASS 9040 12.0 16.7 72 14.3 18.5 77 WINDY PEAK 7900 8.7 8.1 107 9.6 10.5 91 ----- ----- Basin wide percent of average 89 94 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 17.0 11.1 153 18.5 15.8 117 DIVIDE PEAK 8880 24.0 19.9 121 25.3 20.7 122 OLD BATTLE 10000 33.6 32.3 104 37.9 34.6 110 SANDSTONE RS 8150 18.8 14.9 126 20.5 18.7 110 WHISKEY PARK 8950 33.4 30.3 110 33.7 28.7 117 ----- ----- Basin wide percent of average 117 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.3 14.6 84 12.1 13.4 90 BLIND BULL SUM 8650 26.6 28.2 94 19.7 22.4 88 EAST RIM DIVIDE 7930 10.0 13.2 76 12.0 12.1 99 ELKHART PARK G.S. 9400 12.8 13.5 95 13.8 13.4 103 GROS VENTRE SUMMIT 8750 -M 14.3 * 15.7 13.0 121 GUNSIGHT PASS 9820 15.0 -M * 15.9 -M * KENDALL R.S. 7740 11.7 14.6 80 13.8 14.7 94 LOOMIS PARK 8240 16.3 17.5 93 18.4 17.5 105 NEW FORK LAKE 8340 11.7 11.3 104 10.4 11.4 91 SNIDER BASIN 8060 14.4 14.7 98 14.7 16.2 91 SPRING CREEK DIVIDE 9000 27.2 26.8 101 26.3 26.6 99 TRIPLE PEAK 8500 24.5 25.1 98 26.1 24.9 105 ----- ----- Basin wide percent of average 93 99 LOWER GREEN RIVER HAMS FORK 7840 11.0 12.1 91 11.4 12.3 93 HEWINTA 9519 9.3 12.0 78 13.1 14.6 90 HICKERSON PARK 9145 4.2 7.6 55 7.4 7.9 94 HOLE-IN-ROCK 9150 4.7 7.1 66 7.5 7.4 101 INDIAN CREEK 9425 24.6 28.1 88 21.8 25.6 85 KELLEY R.S. 8180 16.3 17.0 96 17.9 20.4 88 STEEL CREEK PARK 10200 12.3 15.8 78 15.6 16.2 96 ----- ----- Basin wide percent of average 83 91 UPPER BEAR RIVER BUG LAKE 7950 19.0 21.1 90 17.9 19.4 92 HAYDEN FORK 9212 15.8 16.5 96 20.8 21.0 99 KELLEY R.S. 8180 16.3 17.0 96 17.9 20.4 88 LILY LAKE 9156 13.9 13.3 105 16.0 17.5 91 MONTE CRISTO 8960 26.7 30.0 89 25.9 25.6 101 SALT RIVER SUMMIT 7760 14.9 14.6 102 16.1 18.9 85 TRIAL LAKE 9992 23.5 25.2 93 21.6 25.0 86 ----- ----- Basin wide percent of average 94 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.