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: FEBRUARY 27 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 12.8 15.7 82 15.4 18.2 85 COTTONWOOD CREEK 7670 21.9 17.9 122 25.2 22.5 112 GRAND TARGHEE 9260 32.3 -M * 26.8 -M * GRANITE CREEK 6770 14.0 15.7 89 18.4 17.1 108 GRASSY LAKE 7265 24.7 28.9 85 27.6 30.4 91 GROS VENTRE SUMMIT 8750 9.7 11.2 87 11.7 10.5 111 GUNSIGHT PASS 9820 11.6 -M * 12.4 -M * LEWIS LAKE DIVIDE 7850 20.9 29.0 72 24.5 30.8 80 PHILLIPS BENCH 8200 20.8 23.4 89 22.8 24.1 95 SALT RIVER SUMMIT 7760 11.5 11.9 97 12.8 15.5 83 SNAKE RIVER STATION 6920 13.4 16.2 83 17.4 19.1 91 SPRING CREEK DIVIDE 9000 21.9 21.7 101 21.9 22.1 99 THUMB DIVIDE 7980 12.8 15.0 85 14.4 15.7 92 TOGWOTEE PASS 9580 22.4 20.3 110 24.3 20.3 120 TWO OCEAN PLATEAU 9240 27.2 22.9 119 21.2 22.9 93 WILLOW CREEK 8380 27.6 24.9 111 31.9 26.5 120 ----- ----- Basin wide percent of average 95 98 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 17.8 19.5 91 16.3 16.8 97 BLACK BEAR 8170 26.7 32.4 82 27.1 32.5 83 CANYON 7870 10.2 11.2 91 11.0 12.8 86 FISHER CREEK 9100 28.8 29.1 99 27.1 30.0 90 MADISON PLATEAU 7750 15.4 20.4 75 17.3 21.6 80 NORTHEAST ENTRANCE 7350 8.5 9.6 89 10.8 10.6 102 PARKER PEAK 9400 19.9 18.0 111 15.1 13.4 113 SYLVAN LAKE 8420 14.8 18.6 80 17.1 17.6 97 THUMB DIVIDE 7980 12.8 15.0 85 14.4 15.7 92 TWO OCEAN PLATEAU 9240 27.2 22.9 119 21.2 22.9 93 WHISKEY CREEK 6800 11.2 14.1 79 14.3 17.0 84 WHITE MILL 8700 19.1 19.9 96 18.8 22.2 85 WOLVERINE 7650 9.6 10.5 91 9.1 11.0 83 ----- ----- Basin wide percent of average 92 90 WIND RIVER BURROUGHS CREEK 8750 13.0 12.6 103 13.6 13.4 101 COLD SPRINGS 9630 5.5 7.2 76 7.3 8.3 88 DEER PARK 9700 7.8 14.5 54 11.8 17.5 67 HOBBS PARK 10100 7.9 11.8 67 8.1 9.7 84 LITTLE WARM 9370 8.6 9.4 91 11.0 10.7 103 SOUTH PASS 9040 8.3 13.9 60 10.0 14.7 68 ST. LAWRENCE ALT 8620 2.2 5.9 37 5.2 6.9 75 TOGWOTEE PASS 9580 22.4 20.3 110 24.3 20.3 120 TOWNSEND CREEK 8700 4.6 6.9 67 6.9 8.7 79 ----- ----- Basin wide percent of average 78 89 BIGHORN BASIN BALD MTN. 9380 15.6 15.8 99 12.7 13.9 91 BEAR TRAP MEADOW 8200 7.4 4.3 172 7.6 6.3 121 BLACKWATER 9780 18.0 20.2 89 16.5 16.9 98 BONE SPRINGS DIV 9350 15.7 13.0 121 12.2 11.4 107 EVENING STAR 9200 23.3 24.7 94 24.3 21.4 114 GRAVE SPRINGS 8550 6.8 7.2 94 7.7 7.6 101 KIRWIN 9550 9.5 9.1 104 10.6 9.0 118 MARQUETTE 8760 2.9 6.8 43 5.9 7.3 81 MIDDLE POWDER 7760 8.7 8.9 98 7.9 9.4 84 OWL CREEK 8975 4.1 4.1 100 3.9 4.3 91 POWDER RIVER PASS 9480 10.7 8.7 123 12.2 9.8 124 SHELL CREEK 9580 14.2 11.7 121 13.6 10.6 128 SYLVAN LAKE 8420 14.8 18.6 80 17.1 17.6 97 SYLVAN ROAD 7120 11.6 11.3 103 14.6 15.4 95 TIMBER CREEK 7950 3.1 4.2 74 6.1 5.3 115 YOUNTS PEAK 8350 15.3 14.5 106 13.6 13.4 101 ----- ----- Basin wide percent of average 99 104 SHOSHONE RIVER BLACKWATER 9780 18.0 20.2 89 16.5 16.9 98 EVENING STAR 9200 23.3 24.7 94 24.3 21.4 114 KIRWIN 9550 9.5 9.1 104 10.6 9.0 118 MARQUETTE 8760 2.9 6.8 43 5.9 7.3 81 SYLVAN LAKE 8420 14.8 18.6 80 17.1 17.6 97 SYLVAN ROAD 7120 11.6 11.3 103 14.6 15.4 95 YOUNTS PEAK 8350 15.3 14.5 106 13.6 13.4 101 ----- ----- Basin wide percent of average 91 102 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.4 4.3 172 7.6 6.3 121 BIG GOOSE 7990 6.8 7.5 91 9.0 6.7 134 BONE SPRINGS DIV 9350 15.7 13.0 121 12.2 11.4 107 BURGESS JUNCTION 7880 9.5 8.9 107 9.9 9.3 106 CLOUD PEAK RESERVOIR 9860 13.9 9.9 140 13.0 9.6 135 DOME LAKE 8880 9.8 9.5 103 11.8 10.0 118 GRAVE SPRINGS 8550 6.8 7.2 94 7.7 7.6 101 HANSEN SAWMILL 8360 5.3 5.1 104 7.9 6.2 127 MIDDLE POWDER 7760 8.7 8.9 98 7.9 9.4 84 POWDER RIVER PASS 9480 10.7 8.7 123 12.2 9.8 124 SUCKER CREEK 8880 11.2 9.0 124 13.2 10.3 128 TIE CREEK 6870 3.8 4.9 78 10.3 7.8 132 ----- ----- Basin wide percent of average 113 118 BELLE FOURCHE BLIND PARK 6890 8.1 7.0 116 12.7 9.1 140 COLE CANYON 5910 5.5 5.6 98 9.7 5.4 180 NORTH RAPID CREEK 6130 8.0 6.6 121 10.8 7.3 148 ----- ----- Basin wide percent of average 113 152 UPPER N. PLATTE RIVER COLUMBINE 9160 23.6 21.4 110 22.2 20.4 109 DIVIDE PEAK 8880 18.5 15.3 121 20.1 16.7 120 ELK RIVER 8700 20.2 15.7 129 18.5 15.7 118 JOE WRIGHT 10120 18.4 16.9 109 22.3 19.7 113 NORTH FRENCH CREEK 10130 28.0 22.1 127 26.4 19.8 133 OLD BATTLE 10000 27.1 25.6 106 32.1 27.8 115 SAGE CREEK BASIN 7850 10.2 8.9 115 11.6 9.7 120 SOUTH BRUSH CREEK 8440 11.0 9.7 113 12.6 13.1 96 TOWER 10500 36.9 36.8 100 34.2 31.3 109 WEBBER SPRINGS 9250 20.5 20.7 99 23.6 21.6 109 WILLOW CREEK PASS 9540 10.6 9.4 113 9.7 10.1 96 ----- ----- Basin wide percent of average 111 113 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 18.4 18.6 99 17.1 17.1 100 CASPER MTN. 7900 8.3 11.1 75 10.5 10.8 97 DEADMAN HILL 10220 13.0 12.7 102 13.3 13.0 102 DEER PARK 9700 7.8 14.5 54 11.8 17.5 67 LAPRELE CREEK 8375 7.7 8.7 89 8.4 9.8 86 RENO HILL 8400 9.0 10.1 89 10.2 11.3 90 ROACH 9700 13.1 13.6 96 15.0 14.5 103 SAND LAKE 10050 23.7 24.5 97 21.8 18.9 115 SOUTH PASS 9040 8.3 13.9 60 10.0 14.7 68 WINDY PEAK 7900 6.8 5.8 117 7.2 8.3 87 ----- ----- Basin wide percent of average 87 92 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 13.7 9.4 146 14.6 12.1 121 DIVIDE PEAK 8880 18.5 15.3 121 20.1 16.7 120 OLD BATTLE 10000 27.1 25.6 106 32.1 27.8 115 SANDSTONE RS 8150 14.3 12.2 117 16.7 15.3 109 WHISKEY PARK 8950 26.5 23.2 114 27.8 23.0 121 ----- ----- Basin wide percent of average 117 117 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.9 11.9 83 9.9 11.1 89 BLIND BULL SUM 8650 20.5 22.5 91 16.7 18.7 89 EAST RIM DIVIDE 7930 8.0 10.8 74 10.5 10.0 105 ELKHART PARK G.S. 9400 10.8 10.9 99 11.7 10.7 109 GROS VENTRE SUMMIT 8750 9.7 11.2 87 11.7 10.5 111 GUNSIGHT PASS 9820 11.6 -M * 12.4 -M * KENDALL R.S. 7740 9.6 12.1 79 11.7 12.2 96 LOOMIS PARK 8240 14.0 14.1 99 16.2 14.5 112 NEW FORK LAKE 8340 9.8 9.4 104 8.9 9.4 95 SNIDER BASIN 8060 11.8 12.2 97 12.4 13.5 92 SPRING CREEK DIVIDE 9000 21.9 21.7 101 21.9 22.1 99 TRIPLE PEAK 8500 20.4 20.4 100 22.1 20.2 109 ----- ----- Basin wide percent of average 93 101 LOWER GREEN RIVER HAMS FORK 7840 9.1 10.7 85 9.0 10.2 88 HEWINTA 9519 6.5 8.8 74 9.5 11.4 83 HICKERSON PARK 9145 2.7 5.7 47 5.3 6.1 87 HOLE-IN-ROCK 9150 3.2 5.6 57 5.3 5.7 93 INDIAN CREEK 9425 18.8 21.7 87 17.3 20.7 84 KELLEY R.S. 8180 12.1 13.6 89 13.8 16.9 82 STEEL CREEK PARK 10200 8.4 12.3 68 11.7 12.6 93 ----- ----- Basin wide percent of average 78 86 UPPER BEAR RIVER BUG LAKE 7950 14.2 16.7 85 13.6 15.8 86 HAYDEN FORK 9212 12.9 12.8 101 15.9 16.7 95 KELLEY R.S. 8180 12.1 13.6 89 13.8 16.9 82 LILY LAKE 9156 10.5 10.6 99 12.2 14.0 87 MONTE CRISTO 8960 20.0 24.1 83 20.2 20.7 98 SALT RIVER SUMMIT 7760 11.5 11.9 97 12.8 15.5 83 TRIAL LAKE 9992 18.2 20.1 91 17.7 20.0 88 ----- ----- Basin wide percent of average 91 89 ----------------------------------------------------------------------------- -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.