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: APRIL 18 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.2 16.4 93 21.3 23.1 92 COTTONWOOD CREEK 7670 29.8 23.5 127 34.7 30.0 116 GRAND TARGHEE 9260 49.3 -M * 37.9 -M * GRANITE CREEK 6770 16.7 16.6 101 23.2 21.2 109 GRASSY LAKE 7265 34.8 36.9 94 37.9 38.8 98 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.4 14.2 123 GUNSIGHT PASS 9820 16.5 -M * 17.9 -M * LEWIS LAKE DIVIDE 7850 34.7 36.7 95 36.7 39.7 92 PHILLIPS BENCH 8200 30.8 30.7 100 33.0 31.4 105 SALT RIVER SUMMIT 7760 16.3 14.1 116 18.6 20.5 91 SNAKE RIVER STATION 6920 18.4 17.0 108 24.8 24.2 102 SPRING CREEK DIVIDE 9000 31.3 28.7 109 29.9 28.7 104 THUMB DIVIDE 7980 21.8 18.4 118 23.8 20.6 116 TOGWOTEE PASS 9580 30.6 26.9 114 32.6 27.1 120 TWO OCEAN PLATEAU 9240 41.3 30.8 134 32.1 30.2 106 WILLOW CREEK 8380 38.3 31.9 120 43.2 35.2 123 ----- ----- Basin wide percent of average 110 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 25.1 25.5 98 23.0 22.0 105 BLACK BEAR 8170 38.6 41.1 94 38.9 43.7 89 CANYON 7870 14.9 13.6 110 16.5 16.7 99 FISHER CREEK 9100 39.1 37.1 105 38.3 39.5 97 MADISON PLATEAU 7750 25.4 26.0 98 26.8 29.1 92 NORTHEAST ENTRANCE 7350 10.3 10.3 100 15.0 13.8 109 PARKER PEAK 9400 29.7 23.5 126 20.4 18.0 113 SYLVAN LAKE 8420 22.4 24.2 93 25.5 23.0 111 THUMB DIVIDE 7980 21.8 18.4 118 23.8 20.6 116 TWO OCEAN PLATEAU 9240 41.3 30.8 134 32.1 30.2 106 WHISKEY CREEK 6800 18.7 17.7 106 22.6 22.8 99 WHITE MILL 8700 26.7 26.1 102 26.3 29.4 89 WOLVERINE 7650 12.2 10.7 114 13.4 14.1 95 ----- ----- Basin wide percent of average 107 100 WIND RIVER BURROUGHS CREEK 8750 17.7 15.1 117 18.5 17.9 103 COLD SPRINGS 9630 9.7 6.6 147 12.7 12.3 103 DEER PARK 9700 15.1 17.6 86 20.0 24.5 82 HOBBS PARK 10100 16.9 16.9 100 17.2 14.9 115 LITTLE WARM 9370 13.4 12.4 108 16.5 15.1 109 SOUTH PASS 9040 15.7 17.7 89 17.5 20.7 85 ST. LAWRENCE ALT 8620 8.4 7.1 118 12.1 10.4 116 TOGWOTEE PASS 9580 30.6 26.9 114 32.6 27.1 120 TOWNSEND CREEK 8700 11.9 9.7 123 14.7 13.6 108 ----- ----- Basin wide percent of average 107 103 BIGHORN BASIN BALD MTN. 9380 20.0 22.0 91 16.9 19.4 87 BEAR TRAP MEADOW 8200 8.1 4.4 184 10.5 9.6 109 BLACKWATER 9780 28.2 27.0 104 25.5 22.9 111 BONE SPRINGS DIV 9350 -M 17.7 * 15.8 16.5 96 EVENING STAR 9200 32.2 32.2 100 33.8 27.9 121 GRAVE SPRINGS 8550 10.4 10.8 96 11.4 11.6 98 KIRWIN 9550 15.2 12.4 123 16.4 12.7 129 MARQUETTE 8760 8.6 10.6 81 10.6 11.7 91 MIDDLE POWDER 7760 13.0 14.0 93 11.7 14.1 83 OWL CREEK 8975 6.8 5.1 133 7.7 7.0 110 POWDER RIVER PASS 9480 13.4 11.8 114 16.1 14.1 114 SHELL CREEK 9580 17.7 16.2 109 16.9 15.1 112 SYLVAN LAKE 8420 22.4 24.2 93 25.5 23.0 111 SYLVAN ROAD 7120 13.6 11.6 117 20.9 19.2 109 TIMBER CREEK 7950 5.9 5.6 105 9.5 8.8 108 YOUNTS PEAK 8350 19.8 18.2 109 17.7 17.6 101 ----- ----- Basin wide percent of average 104 106 SHOSHONE RIVER BLACKWATER 9780 28.2 27.0 104 25.5 22.9 111 EVENING STAR 9200 32.2 32.2 100 33.8 27.9 121 KIRWIN 9550 15.2 12.4 123 16.4 12.7 129 MARQUETTE 8760 8.6 10.6 81 10.6 11.7 91 SYLVAN LAKE 8420 22.4 24.2 93 25.5 23.0 111 SYLVAN ROAD 7120 13.6 11.6 117 20.9 19.2 109 YOUNTS PEAK 8350 19.8 18.2 109 17.7 17.6 101 ----- ----- Basin wide percent of average 103 111 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.1 4.4 184 10.5 9.6 109 BIG GOOSE 7990 12.0 12.5 96 14.8 10.9 136 BONE SPRINGS DIV 9350 -M 17.7 * 15.8 16.5 96 BURGESS JUNCTION 7880 13.8 13.2 105 14.5 13.8 105 CLOUD PEAK RESERVOIR 9860 20.0 15.4 130 19.0 14.9 128 DOME LAKE 8880 14.5 13.9 104 17.5 15.0 117 GRAVE SPRINGS 8550 10.4 10.8 96 11.4 11.6 98 HANSEN SAWMILL 8360 7.5 6.0 125 11.4 9.5 120 MIDDLE POWDER 7760 13.0 14.0 93 11.7 14.1 83 POWDER RIVER PASS 9480 13.4 11.8 114 16.1 14.1 114 SUCKER CREEK 8880 16.5 13.4 123 19.0 15.5 123 TIE CREEK 6870 7.0 5.4 130 16.1 11.7 138 ----- ----- Basin wide percent of average 113 113 BELLE FOURCHE BLIND PARK 6890 4.4 7.4 59 15.9 12.6 126 COLE CANYON 5910 7.0 7.0 100 13.8 7.8 177 NORTH RAPID CREEK 6130 8.4 8.6 98 15.9 9.7 164 ----- ----- Basin wide percent of average 86 151 UPPER N. PLATTE RIVER COLUMBINE 9160 27.1 24.4 111 30.1 27.5 109 DIVIDE PEAK 8880 28.1 20.9 134 30.2 22.6 134 ELK RIVER 8700 23.3 19.3 121 24.5 21.5 114 JOE WRIGHT 10120 26.1 23.9 109 31.9 27.6 116 NORTH FRENCH CREEK 10130 38.1 32.9 116 35.4 27.2 130 OLD BATTLE 10000 38.8 35.0 111 43.9 37.5 117 SAGE CREEK BASIN 7850 16.0 12.1 132 17.0 13.1 130 SOUTH BRUSH CREEK 8440 13.8 13.2 105 19.7 18.3 108 TOWER 10500 48.5 50.0 97 45.0 42.1 107 WEBBER SPRINGS 9250 29.3 26.1 112 33.4 29.2 114 WILLOW CREEK PASS 9540 14.5 13.8 105 14.3 14.3 100 ----- ----- Basin wide percent of average 112 116 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 26.9 26.8 100 25.1 24.7 102 CASPER MTN. 7900 14.6 17.0 86 15.3 17.0 90 DEADMAN HILL 10220 20.9 18.6 112 21.0 19.0 111 DEER PARK 9700 15.1 17.6 86 20.0 24.5 82 LAPRELE CREEK 8375 9.4 10.0 94 14.9 14.5 103 RENO HILL 8400 17.6 16.0 110 19.2 17.6 109 ROACH 9700 19.4 18.4 105 21.9 20.6 106 SAND LAKE 10050 35.3 35.3 100 33.3 26.9 124 SOUTH PASS 9040 15.7 17.7 89 17.5 20.7 85 WINDY PEAK 7900 10.4 7.7 135 12.8 12.0 107 ----- ----- Basin wide percent of average 100 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 16.9 8.2 206 20.6 17.4 118 DIVIDE PEAK 8880 28.1 20.9 134 30.2 22.6 134 OLD BATTLE 10000 38.8 35.0 111 43.9 37.5 117 SANDSTONE RS 8150 21.7 13.1 166 23.2 20.3 114 WHISKEY PARK 8950 35.3 30.6 115 38.0 31.4 121 ----- ----- Basin wide percent of average 131 121 UPPER GREEN RIVER BIG SANDY OPENING 9080 14.3 15.3 93 14.5 14.7 99 BLIND BULL SUM 8650 30.4 28.9 105 22.9 24.0 95 EAST RIM DIVIDE 7930 10.8 14.0 77 13.7 13.0 105 ELKHART PARK G.S. 9400 15.6 14.0 111 17.1 14.7 116 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.4 14.2 123 GUNSIGHT PASS 9820 16.5 -M * 17.9 -M * KENDALL R.S. 7740 10.8 13.3 81 15.2 15.6 97 LOOMIS PARK 8240 17.7 16.9 105 20.7 18.8 110 NEW FORK LAKE 8340 12.8 11.1 115 12.5 12.4 101 SNIDER BASIN 8060 16.0 14.8 108 17.1 17.6 97 SPRING CREEK DIVIDE 9000 31.3 28.7 109 29.9 28.7 104 TRIPLE PEAK 8500 26.3 25.9 102 29.7 27.0 110 ----- ----- Basin wide percent of average 102 105 LOWER GREEN RIVER HAMS FORK 7840 12.8 9.6 133 14.3 13.5 106 HEWINTA 9519 13.6 12.1 112 15.7 16.4 96 HICKERSON PARK 9145 8.1 8.1 100 11.8 9.1 130 HOLE-IN-ROCK 9150 8.0 7.1 113 11.2 8.6 130 INDIAN CREEK 9425 28.3 29.6 96 25.5 27.9 91 KELLEY R.S. 8180 18.4 17.0 108 20.7 22.2 93 STEEL CREEK PARK 10200 15.9 17.5 91 19.1 18.6 103 ----- ----- Basin wide percent of average 104 102 UPPER BEAR RIVER BUG LAKE 7950 21.0 21.5 98 20.5 21.0 98 HAYDEN FORK 9212 19.5 16.3 120 25.2 23.3 108 KELLEY R.S. 8180 18.4 17.0 108 20.7 22.2 93 LILY LAKE 9156 17.6 14.3 123 19.6 19.6 100 MONTE CRISTO 8960 31.2 30.5 102 30.2 28.1 107 SALT RIVER SUMMIT 7760 16.3 14.1 116 18.6 20.5 91 TRIAL LAKE 9992 28.5 26.5 108 27.1 27.5 99 ----- ----- Basin wide percent of average 109 100 ----------------------------------------------------------------------------- -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.