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: APRIL 24 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 11.2 14.9 75 21.3 23.7 90 COTTONWOOD CREEK 7670 26.4 22.2 119 34.9 30.8 113 GRAND TARGHEE 9260 49.5 -M * 38.2 -M * GRANITE CREEK 6770 14.0 15.2 92 23.3 21.7 107 GRASSY LAKE 7265 30.7 35.8 86 37.9 39.7 95 GROS VENTRE SUMMIT 8750 -M 14.2 * 17.4 14.6 119 GUNSIGHT PASS 9820 15.9 -M * 18.1 -M * LEWIS LAKE DIVIDE 7850 32.9 36.2 91 36.6 40.5 90 PHILLIPS BENCH 8200 29.4 30.5 96 33.1 32.1 103 SALT RIVER SUMMIT 7760 13.5 13.0 104 18.5 20.9 89 SNAKE RIVER STATION 6920 13.1 15.2 86 24.8 24.8 100 SPRING CREEK DIVIDE 9000 31.3 28.9 108 30.0 29.3 102 THUMB DIVIDE 7980 19.3 17.2 112 24.0 21.2 113 TOGWOTEE PASS 9580 29.7 27.4 108 32.9 27.9 118 TWO OCEAN PLATEAU 9240 40.9 31.4 130 32.3 31.0 104 WILLOW CREEK 8380 33.4 31.8 105 43.7 36.2 121 ----- ----- Basin wide percent of average 102 104 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 23.7 25.6 93 23.1 22.6 102 BLACK BEAR 8170 36.9 40.6 91 39.0 44.6 87 CANYON 7870 12.9 12.6 102 16.5 17.1 96 FISHER CREEK 9100 38.5 37.6 102 38.5 40.5 95 MADISON PLATEAU 7750 23.5 25.5 92 26.9 29.7 91 NORTHEAST ENTRANCE 7350 5.7 9.0 63 15.0 14.2 106 PARKER PEAK 9400 29.8 24.0 124 20.7 18.6 111 SYLVAN LAKE 8420 20.1 24.0 84 25.6 23.7 108 THUMB DIVIDE 7980 19.3 17.2 112 24.0 21.2 113 TWO OCEAN PLATEAU 9240 40.9 31.4 130 32.3 31.0 104 WHISKEY CREEK 6800 17.5 16.9 104 22.6 23.4 97 WHITE MILL 8700 25.9 26.2 99 26.3 30.1 87 WOLVERINE 7650 8.4 9.1 92 13.5 14.5 93 ----- ----- Basin wide percent of average 101 98 WIND RIVER BURROUGHS CREEK 8750 16.9 14.6 116 18.7 18.5 101 COLD SPRINGS 9630 7.8 5.4 144 12.7 13.0 98 DEER PARK 9700 13.7 18.6 74 20.4 25.5 80 HOBBS PARK 10100 15.6 17.3 90 17.3 15.8 109 LITTLE WARM 9370 11.5 11.9 97 16.6 15.8 105 SOUTH PASS 9040 14.3 17.8 80 17.6 21.5 82 ST. LAWRENCE ALT 8620 6.2 6.5 95 12.0 11.1 108 TOGWOTEE PASS 9580 29.7 27.4 108 32.9 27.9 118 TOWNSEND CREEK 8700 10.3 9.5 108 15.1 14.4 105 ----- ----- Basin wide percent of average 98 100 BIGHORN BASIN BALD MTN. 9380 19.0 22.7 84 16.9 20.1 84 BEAR TRAP MEADOW 8200 5.2 3.4 153 10.5 10.1 104 BLACKWATER 9780 27.5 27.5 100 25.5 23.7 108 BONE SPRINGS DIV 9350 16.3 17.7 92 15.7 17.2 91 EVENING STAR 9200 30.3 32.4 94 34.1 28.8 118 GRAVE SPRINGS 8550 9.3 11.0 85 11.4 12.3 93 KIRWIN 9550 14.1 12.7 111 16.6 13.3 125 MARQUETTE 8760 6.8 10.7 64 10.3 12.5 82 MIDDLE POWDER 7760 11.2 14.3 78 11.5 14.8 78 OWL CREEK 8975 3.2 4.3 74 7.7 7.5 103 POWDER RIVER PASS 9480 11.0 11.5 96 16.2 14.8 109 SHELL CREEK 9580 17.3 16.4 105 16.9 15.8 107 SYLVAN LAKE 8420 20.1 24.0 84 25.6 23.7 108 SYLVAN ROAD 7120 7.5 10.0 75 21.0 19.7 107 TIMBER CREEK 7950 3.3 5.1 65 9.4 9.4 100 YOUNTS PEAK 8350 19.4 18.2 107 18.0 18.1 99 ----- ----- Basin wide percent of average 92 102 SHOSHONE RIVER BLACKWATER 9780 27.5 27.5 100 25.5 23.7 108 EVENING STAR 9200 30.3 32.4 94 34.1 28.8 118 KIRWIN 9550 14.1 12.7 111 16.6 13.3 125 MARQUETTE 8760 6.8 10.7 64 10.3 12.5 82 SYLVAN LAKE 8420 20.1 24.0 84 25.6 23.7 108 SYLVAN ROAD 7120 7.5 10.0 75 21.0 19.7 107 YOUNTS PEAK 8350 19.4 18.2 107 18.0 18.1 99 ----- ----- Basin wide percent of average 93 108 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.2 3.4 153 10.5 10.1 104 BIG GOOSE 7990 10.4 12.4 84 14.7 11.8 125 BONE SPRINGS DIV 9350 16.3 17.7 92 15.7 17.2 91 BURGESS JUNCTION 7880 12.8 13.2 97 14.4 14.5 99 CLOUD PEAK RESERVOIR 9860 18.6 15.9 117 19.5 15.8 123 DOME LAKE 8880 12.4 13.6 91 17.5 15.7 111 GRAVE SPRINGS 8550 9.3 11.0 85 11.4 12.3 93 HANSEN SAWMILL 8360 3.9 5.3 74 11.5 10.1 114 MIDDLE POWDER 7760 11.2 14.3 78 11.5 14.8 78 POWDER RIVER PASS 9480 11.0 11.5 96 16.2 14.8 109 SUCKER CREEK 8880 15.0 13.4 112 19.0 16.2 117 TIE CREEK 6870 3.7 5.3 70 16.1 12.4 130 ----- ----- Basin wide percent of average 95 107 BELLE FOURCHE BLIND PARK 6890 -M 6.2 * 15.9 13.2 120 COLE CANYON 5910 4.6 6.4 72 13.9 8.4 165 NORTH RAPID CREEK 6130 3.8 7.2 53 15.9 10.4 153 ----- ----- Basin wide percent of average 62 143 UPPER N. PLATTE RIVER COLUMBINE 9160 24.6 23.4 105 30.4 28.2 108 DIVIDE PEAK 8880 26.6 20.7 129 30.4 23.3 130 ELK RIVER 8700 19.5 18.0 108 24.6 22.1 111 JOE WRIGHT 10120 26.3 24.6 107 32.2 28.6 113 NORTH FRENCH CREEK 10130 37.4 33.8 111 35.6 28.2 126 OLD BATTLE 10000 38.8 35.8 108 44.1 38.5 115 SAGE CREEK BASIN 7850 13.2 12.0 110 17.0 13.5 126 SOUTH BRUSH CREEK 8440 10.5 12.6 83 19.9 19.1 104 TOWER 10500 48.5 51.2 95 47.0 43.4 108 WEBBER SPRINGS 9250 27.4 26.0 105 33.5 30.0 112 WILLOW CREEK PASS 9540 14.3 14.2 101 14.6 14.9 98 ----- ----- Basin wide percent of average 105 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.9 27.8 93 25.5 25.7 99 CASPER MTN. 7900 13.2 17.5 75 15.6 18.1 86 DEADMAN HILL 10220 20.5 19.2 107 21.7 19.8 110 DEER PARK 9700 13.7 18.6 74 20.4 25.5 80 LAPRELE CREEK 8375 8.5 8.9 96 15.1 15.3 99 RENO HILL 8400 15.8 15.9 99 19.7 18.7 105 ROACH 9700 18.6 18.5 101 22.2 21.4 104 SAND LAKE 10050 35.0 36.2 97 33.7 27.9 121 SOUTH PASS 9040 14.3 17.8 80 17.6 21.5 82 WINDY PEAK 7900 9.1 6.7 136 13.0 12.6 103 ----- ----- Basin wide percent of average 93 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 9.9 6.7 148 20.6 17.9 115 DIVIDE PEAK 8880 26.6 20.7 129 30.4 23.3 130 OLD BATTLE 10000 38.8 35.8 108 44.1 38.5 115 SANDSTONE RS 8150 17.2 11.9 145 23.1 21.0 110 WHISKEY PARK 8950 33.0 30.7 107 38.1 32.4 118 ----- ----- Basin wide percent of average 119 117 UPPER GREEN RIVER BIG SANDY OPENING 9080 12.2 14.8 82 14.5 15.2 95 BLIND BULL SUM 8650 29.6 28.6 103 22.9 24.5 93 EAST RIM DIVIDE 7930 6.5 13.9 47 13.7 13.4 102 ELKHART PARK G.S. 9400 13.4 13.8 97 17.1 15.2 113 GROS VENTRE SUMMIT 8750 -M 14.2 * 17.4 14.6 119 GUNSIGHT PASS 9820 15.9 -M * 18.1 -M * KENDALL R.S. 7740 7.1 12.2 58 15.2 16.0 95 LOOMIS PARK 8240 14.0 16.0 88 20.8 19.3 108 NEW FORK LAKE 8340 9.5 10.3 92 12.5 12.8 98 SNIDER BASIN 8060 14.0 14.2 99 17.0 18.0 94 SPRING CREEK DIVIDE 9000 31.3 28.9 108 30.0 29.3 102 TRIPLE PEAK 8500 23.3 25.4 92 29.8 27.7 108 ----- ----- Basin wide percent of average 90 102 LOWER GREEN RIVER HAMS FORK 7840 8.9 8.2 109 14.5 14.0 104 HEWINTA 9519 8.2 11.2 73 15.7 17.0 92 HICKERSON PARK 9145 5.0 7.4 68 11.9 9.6 124 HOLE-IN-ROCK 9150 4.8 6.3 76 11.4 9.1 125 INDIAN CREEK 9425 -M 29.4 * 25.6 28.5 90 KELLEY R.S. 8180 15.1 16.1 94 20.7 22.8 91 STEEL CREEK PARK 10200 16.7 18.0 93 19.2 19.3 99 ----- ----- Basin wide percent of average 87 99 UPPER BEAR RIVER BUG LAKE 7950 18.5 20.5 90 20.5 21.6 95 HAYDEN FORK 9212 13.9 15.2 91 25.2 24.1 105 KELLEY R.S. 8180 15.1 16.1 94 20.7 22.8 91 LILY LAKE 9156 12.8 13.2 97 19.6 20.3 97 MONTE CRISTO 8960 27.9 29.9 93 30.2 29.0 104 SALT RIVER SUMMIT 7760 13.5 13.0 104 18.5 20.9 89 TRIAL LAKE 9992 26.8 26.6 101 27.2 28.3 96 ----- ----- Basin wide percent of average 96 97 ----------------------------------------------------------------------------- -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.