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 SATURDAY: FEBRUARY 21 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.5 15.1 76 14.3 17.4 82 COTTONWOOD CREEK 7670 19.7 16.9 117 23.2 21.6 107 GRAND TARGHEE 9260 30.0 -M * 25.8 -M * GRANITE CREEK 6770 12.2 15.0 81 16.7 16.3 102 GRASSY LAKE 7265 23.3 27.5 85 26.2 29.2 90 GROS VENTRE SUMMIT 8750 8.6 10.8 80 10.5 10.0 105 GUNSIGHT PASS 9820 10.5 -M * 11.5 -M * LEWIS LAKE DIVIDE 7850 19.2 27.7 69 22.9 29.4 78 PHILLIPS BENCH 8200 19.3 22.3 87 21.5 23.0 93 SALT RIVER SUMMIT 7760 10.1 11.4 89 11.5 14.8 78 SNAKE RIVER STATION 6920 12.4 15.4 81 16.4 18.3 90 SPRING CREEK DIVIDE 9000 19.5 20.7 94 19.9 21.2 94 THUMB DIVIDE 7980 11.5 14.2 81 13.3 14.9 89 TOGWOTEE PASS 9580 20.9 19.6 107 22.9 19.4 118 TWO OCEAN PLATEAU 9240 25.4 22.0 115 19.9 21.8 91 WILLOW CREEK 8380 25.0 23.8 105 29.3 25.3 116 ----- ----- Basin wide percent of average 91 95 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.3 18.9 86 15.0 16.1 93 BLACK BEAR 8170 24.4 31.0 79 25.2 31.0 81 CANYON 7870 9.4 10.8 87 10.1 12.3 82 FISHER CREEK 9100 26.5 28.0 95 24.7 28.7 86 MADISON PLATEAU 7750 13.6 19.6 69 15.6 20.6 76 NORTHEAST ENTRANCE 7350 7.7 9.2 84 10.1 10.2 99 PARKER PEAK 9400 18.7 17.2 109 -M 12.9 * SYLVAN LAKE 8420 13.9 17.9 78 16.2 17.0 95 THUMB DIVIDE 7980 11.5 14.2 81 13.3 14.9 89 TWO OCEAN PLATEAU 9240 25.4 22.0 115 19.9 21.8 91 WHISKEY CREEK 6800 9.9 13.6 73 13.1 16.2 81 WHITE MILL 8700 17.6 19.2 92 17.2 21.3 81 WOLVERINE 7650 9.2 10.2 90 8.8 10.6 83 ----- ----- Basin wide percent of average 88 86 WIND RIVER BURROUGHS CREEK 8750 12.3 12.0 103 12.9 12.9 100 COLD SPRINGS 9630 5.0 6.9 72 6.8 8.0 85 DEER PARK 9700 6.7 13.9 48 10.6 16.9 63 HOBBS PARK 10100 7.0 11.3 62 7.3 9.3 78 LITTLE WARM 9370 7.9 9.0 88 10.1 10.3 98 SOUTH PASS 9040 7.2 13.4 54 9.4 14.2 66 ST. LAWRENCE ALT 8620 1.8 5.6 32 4.9 6.6 74 TOGWOTEE PASS 9580 20.9 19.6 107 22.9 19.4 118 TOWNSEND CREEK 8700 4.0 6.6 61 6.5 8.4 77 ----- ----- Basin wide percent of average 74 86 BIGHORN BASIN BALD MTN. 9380 15.3 15.2 101 12.2 13.4 91 BEAR TRAP MEADOW 8200 6.9 4.1 168 7.3 6.1 120 BLACKWATER 9780 16.8 19.3 87 15.5 16.3 95 BONE SPRINGS DIV 9350 15.3 12.3 124 11.6 11.0 105 EVENING STAR 9200 21.8 23.6 92 23.3 20.5 114 GRAVE SPRINGS 8550 6.5 6.7 97 7.5 7.2 104 KIRWIN 9550 8.9 8.7 102 10.0 8.7 115 MARQUETTE 8760 2.9 6.6 44 5.8 7.1 82 MIDDLE POWDER 7760 8.5 8.4 101 7.8 9.1 86 OWL CREEK 8975 3.9 3.9 100 3.8 4.2 90 POWDER RIVER PASS 9480 10.4 8.2 127 11.6 9.5 122 SHELL CREEK 9580 13.7 11.2 122 13.3 10.4 128 SYLVAN LAKE 8420 13.9 17.9 78 16.2 17.0 95 SYLVAN ROAD 7120 10.9 10.7 102 14.0 15.0 93 TIMBER CREEK 7950 2.7 4.0 68 6.2 5.1 122 YOUNTS PEAK 8350 14.2 14.0 101 12.7 12.9 98 ----- ----- Basin wide percent of average 99 103 SHOSHONE RIVER BLACKWATER 9780 16.8 19.3 87 15.5 16.3 95 EVENING STAR 9200 21.8 23.6 92 23.3 20.5 114 KIRWIN 9550 8.9 8.7 102 10.0 8.7 115 MARQUETTE 8760 2.9 6.6 44 5.8 7.1 82 SYLVAN LAKE 8420 13.9 17.9 78 16.2 17.0 95 SYLVAN ROAD 7120 10.9 10.7 102 14.0 15.0 93 YOUNTS PEAK 8350 14.2 14.0 101 12.7 12.9 98 ----- ----- Basin wide percent of average 89 100 POWDER-TONGUE BEAR TRAP MEADOW 8200 6.9 4.1 168 7.3 6.1 120 BIG GOOSE 7990 6.3 7.1 89 8.6 6.4 134 BONE SPRINGS DIV 9350 15.3 12.3 124 11.6 11.0 105 BURGESS JUNCTION 7880 9.1 8.5 107 9.7 9.0 108 CLOUD PEAK RESERVOIR 9860 13.4 9.4 143 12.2 9.3 131 DOME LAKE 8880 9.3 9.1 102 11.4 9.7 118 GRAVE SPRINGS 8550 6.5 6.7 97 7.5 7.2 104 HANSEN SAWMILL 8360 4.8 4.9 98 7.4 5.9 125 MIDDLE POWDER 7760 8.5 8.4 101 7.8 9.1 86 POWDER RIVER PASS 9480 10.4 8.2 127 11.6 9.5 122 SUCKER CREEK 8880 11.0 8.5 129 12.8 9.9 129 TIE CREEK 6870 3.7 4.6 80 10.1 7.5 135 ----- ----- Basin wide percent of average 115 117 BELLE FOURCHE BLIND PARK 6890 7.9 6.3 125 12.7 8.8 144 COLE CANYON 5910 4.8 5.4 89 9.3 5.2 179 NORTH RAPID CREEK 6130 7.7 6.3 122 10.7 7.1 151 ----- ----- Basin wide percent of average 113 155 UPPER N. PLATTE RIVER COLUMBINE 9160 22.2 20.4 109 20.7 19.5 106 DIVIDE PEAK 8880 18.3 14.7 124 19.8 15.9 125 ELK RIVER 8700 19.6 15.0 131 17.8 15.0 119 JOE WRIGHT 10120 17.2 16.2 106 21.0 18.8 112 NORTH FRENCH CREEK 10130 27.0 21.2 127 25.6 18.9 135 OLD BATTLE 10000 26.1 24.3 107 31.1 26.4 118 SAGE CREEK BASIN 7850 10.1 8.5 119 11.5 9.2 125 SOUTH BRUSH CREEK 8440 10.6 9.1 116 12.1 12.6 96 TOWER 10500 34.6 35.3 98 33.0 29.9 110 WEBBER SPRINGS 9250 19.8 19.6 101 23.0 20.7 111 WILLOW CREEK PASS 9540 10.2 9.0 113 9.4 9.7 97 ----- ----- Basin wide percent of average 112 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 17.3 17.8 97 16.4 16.4 100 CASPER MTN. 7900 8.1 10.6 76 10.4 10.3 101 DEADMAN HILL 10220 12.4 12.2 102 12.9 12.3 105 DEER PARK 9700 6.7 13.9 48 10.6 16.9 63 LAPRELE CREEK 8375 7.5 8.3 90 8.1 9.3 87 RENO HILL 8400 8.9 9.7 92 9.9 10.7 93 ROACH 9700 12.5 13.1 95 14.3 13.7 104 SAND LAKE 10050 22.8 23.3 98 20.9 18.1 115 SOUTH PASS 9040 7.2 13.4 54 9.4 14.2 66 WINDY PEAK 7900 6.3 5.6 112 7.0 7.9 89 ----- ----- Basin wide percent of average 86 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 14.0 9.0 156 14.4 11.5 125 DIVIDE PEAK 8880 18.3 14.7 124 19.8 15.9 125 OLD BATTLE 10000 26.1 24.3 107 31.1 26.4 118 SANDSTONE RS 8150 14.1 11.6 122 16.5 14.6 113 WHISKEY PARK 8950 25.9 22.1 117 27.0 22.1 122 ----- ----- Basin wide percent of average 120 120 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.5 11.3 75 8.4 10.6 79 BLIND BULL SUM 8650 18.3 21.5 85 15.3 17.9 85 EAST RIM DIVIDE 7930 7.0 10.3 68 9.6 9.5 101 ELKHART PARK G.S. 9400 9.9 10.4 95 10.9 10.3 106 GROS VENTRE SUMMIT 8750 8.6 10.8 80 10.5 10.0 105 GUNSIGHT PASS 9820 10.5 -M * 11.5 -M * KENDALL R.S. 7740 8.4 11.5 73 10.7 11.6 92 LOOMIS PARK 8240 12.4 13.4 93 14.8 13.9 106 NEW FORK LAKE 8340 9.2 9.0 102 8.6 9.1 95 SNIDER BASIN 8060 10.4 11.6 90 11.0 12.9 85 SPRING CREEK DIVIDE 9000 19.5 20.7 94 19.9 21.2 94 TRIPLE PEAK 8500 17.9 19.5 92 19.8 19.2 103 ----- ----- Basin wide percent of average 87 95 LOWER GREEN RIVER HAMS FORK 7840 7.9 10.1 78 8.3 9.8 85 HEWINTA 9519 6.1 8.3 73 8.9 10.8 82 HICKERSON PARK 9145 2.6 5.4 48 5.1 5.9 86 HOLE-IN-ROCK 9150 2.9 5.2 56 5.1 5.4 94 INDIAN CREEK 9425 16.5 20.7 80 15.5 19.7 79 KELLEY R.S. 8180 10.6 12.9 82 12.2 16.2 75 STEEL CREEK PARK 10200 7.9 11.6 68 11.2 12.0 93 ----- ----- Basin wide percent of average 73 83 UPPER BEAR RIVER BUG LAKE 7950 13.3 15.9 84 12.8 15.1 85 HAYDEN FORK 9212 12.7 12.1 105 15.5 15.9 97 KELLEY R.S. 8180 10.6 12.9 82 12.2 16.2 75 LILY LAKE 9156 10.0 10.0 100 11.8 13.3 89 MONTE CRISTO 8960 19.1 22.7 84 19.5 19.7 99 SALT RIVER SUMMIT 7760 10.1 11.4 89 11.5 14.8 78 TRIAL LAKE 9992 17.7 19.1 93 17.3 19.0 91 ----- ----- Basin wide percent of average 90 88 ----------------------------------------------------------------------------- -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.