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 THURSDAY: APRIL 16 , 2009 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 15.8 16.8 94 21.2 22.9 93 COTTONWOOD CREEK 7670 29.5 23.8 124 34.3 29.8 115 GRAND TARGHEE 9260 48.6 -M * 37.7 -M * GRANITE CREEK 6770 17.1 17.0 101 22.9 21.1 109 GRASSY LAKE 7265 35.0 37.0 95 37.7 38.5 98 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.2 14.0 123 GUNSIGHT PASS 9820 16.3 -M * 17.6 -M * LEWIS LAKE DIVIDE 7850 34.6 36.7 94 36.5 39.4 93 PHILLIPS BENCH 8200 30.4 30.6 99 32.4 31.2 104 SALT RIVER SUMMIT 7760 16.1 14.4 112 18.2 20.3 90 SNAKE RIVER STATION 6920 18.9 17.5 108 24.8 24.0 103 SPRING CREEK DIVIDE 9000 30.5 28.5 107 29.3 28.5 103 THUMB DIVIDE 7980 22.5 18.7 120 23.7 20.5 116 TOGWOTEE PASS 9580 30.3 26.7 113 32.1 26.8 120 TWO OCEAN PLATEAU 9240 41.1 30.6 134 31.9 29.9 107 WILLOW CREEK 8380 38.3 31.9 120 42.8 34.9 123 ----- ----- Basin wide percent of average 109 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 25.1 25.5 98 22.9 21.8 105 BLACK BEAR 8170 39.2 40.9 96 38.6 43.3 89 CANYON 7870 15.1 13.9 109 16.5 16.6 99 FISHER CREEK 9100 39.0 37.0 105 37.9 39.2 97 MADISON PLATEAU 7750 25.2 26.1 97 26.7 28.9 92 NORTHEAST ENTRANCE 7350 11.1 10.7 104 15.0 13.7 109 PARKER PEAK 9400 29.6 23.4 126 20.4 17.8 115 SYLVAN LAKE 8420 22.5 24.2 93 25.5 22.8 112 THUMB DIVIDE 7980 22.5 18.7 120 23.7 20.5 116 TWO OCEAN PLATEAU 9240 41.1 30.6 134 31.9 29.9 107 WHISKEY CREEK 6800 18.7 17.8 105 22.4 22.6 99 WHITE MILL 8700 26.6 26.0 102 26.3 29.1 90 WOLVERINE 7650 12.3 11.0 112 13.3 13.9 96 ----- ----- Basin wide percent of average 107 100 WIND RIVER BURROUGHS CREEK 8750 17.2 15.1 114 17.8 17.7 101 COLD SPRINGS 9630 9.2 7.1 130 12.2 12.1 101 DEER PARK 9700 14.6 17.1 85 19.5 24.1 81 HOBBS PARK 10100 16.4 16.8 98 16.7 14.7 114 LITTLE WARM 9370 13.1 12.5 105 16.1 14.9 108 SOUTH PASS 9040 15.1 17.7 85 16.8 20.4 82 ST. LAWRENCE ALT 8620 7.9 7.3 108 11.7 10.2 115 TOGWOTEE PASS 9580 30.3 26.7 113 32.1 26.8 120 TOWNSEND CREEK 8700 11.2 9.8 114 14.2 13.4 106 ----- ----- Basin wide percent of average 104 102 BIGHORN BASIN BALD MTN. 9380 20.1 21.9 92 16.8 19.1 88 BEAR TRAP MEADOW 8200 8.0 4.7 170 10.3 9.4 110 BLACKWATER 9780 28.1 26.9 104 25.3 22.6 112 BONE SPRINGS DIV 9350 18.3 17.7 103 15.7 16.3 96 EVENING STAR 9200 32.2 32.0 101 33.6 27.6 122 GRAVE SPRINGS 8550 10.2 10.7 95 11.2 11.4 98 KIRWIN 9550 14.5 12.3 118 15.8 12.5 126 MARQUETTE 8760 8.3 10.6 78 10.3 11.4 90 MIDDLE POWDER 7760 12.4 14.0 89 11.2 13.9 81 OWL CREEK 8975 6.2 5.2 119 7.2 6.9 104 POWDER RIVER PASS 9480 13.5 11.9 113 16.0 13.8 116 SHELL CREEK 9580 17.9 16.1 111 16.9 14.9 113 SYLVAN LAKE 8420 22.5 24.2 93 25.5 22.8 112 SYLVAN ROAD 7120 14.5 12.1 120 21.0 19.0 111 TIMBER CREEK 7950 5.5 5.7 96 9.3 8.6 108 YOUNTS PEAK 8350 19.5 18.1 108 17.5 17.5 100 ----- ----- Basin wide percent of average 103 106 SHOSHONE RIVER BLACKWATER 9780 28.1 26.9 104 25.3 22.6 112 EVENING STAR 9200 32.2 32.0 101 33.6 27.6 122 KIRWIN 9550 14.5 12.3 118 15.8 12.5 126 MARQUETTE 8760 8.3 10.6 78 10.3 11.4 90 SYLVAN LAKE 8420 22.5 24.2 93 25.5 22.8 112 SYLVAN ROAD 7120 14.5 12.1 120 21.0 19.0 111 YOUNTS PEAK 8350 19.5 18.1 108 17.5 17.5 100 ----- ----- Basin wide percent of average 102 112 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.0 4.7 170 10.3 9.4 110 BIG GOOSE 7990 11.8 12.4 95 14.7 10.6 139 BONE SPRINGS DIV 9350 18.3 17.7 103 15.7 16.3 96 BURGESS JUNCTION 7880 13.8 13.2 105 14.4 13.6 106 CLOUD PEAK RESERVOIR 9860 19.8 15.3 129 18.8 14.7 128 DOME LAKE 8880 14.4 14.0 103 17.4 14.8 118 GRAVE SPRINGS 8550 10.2 10.7 95 11.2 11.4 98 HANSEN SAWMILL 8360 7.3 6.2 118 11.2 9.3 120 MIDDLE POWDER 7760 12.4 14.0 89 11.2 13.9 81 POWDER RIVER PASS 9480 13.5 11.9 113 16.0 13.8 116 SUCKER CREEK 8880 16.5 13.5 122 18.9 15.2 124 TIE CREEK 6870 7.0 5.3 132 16.0 11.4 140 ----- ----- Basin wide percent of average 110 114 BELLE FOURCHE BLIND PARK 6890 5.0 7.6 66 15.9 12.3 129 COLE CANYON 5910 6.9 7.1 97 13.6 7.7 177 NORTH RAPID CREEK 6130 9.0 8.8 102 15.7 9.6 164 ----- ----- Basin wide percent of average 89 153 UPPER N. PLATTE RIVER COLUMBINE 9160 26.8 24.7 109 29.2 27.2 107 DIVIDE PEAK 8880 26.6 20.9 127 29.3 22.4 131 ELK RIVER 8700 23.1 19.6 118 23.9 21.2 113 JOE WRIGHT 10120 24.4 23.6 103 30.2 27.2 111 NORTH FRENCH CREEK 10130 37.3 32.6 114 34.7 26.9 129 OLD BATTLE 10000 37.8 34.7 109 43.1 37.2 116 SAGE CREEK BASIN 7850 14.5 12.1 120 16.6 13.0 128 SOUTH BRUSH CREEK 8440 13.2 13.3 99 19.2 18.1 106 TOWER 10500 47.5 49.5 96 44.9 41.7 108 WEBBER SPRINGS 9250 28.3 26.1 108 32.6 28.9 113 WILLOW CREEK PASS 9540 13.8 13.6 101 13.7 14.1 97 ----- ----- Basin wide percent of average 108 114 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 25.6 26.5 97 23.9 24.4 98 CASPER MTN. 7900 14.1 16.8 84 15.1 16.7 90 DEADMAN HILL 10220 18.5 18.3 101 18.8 18.7 101 DEER PARK 9700 14.6 17.1 85 19.5 24.1 81 LAPRELE CREEK 8375 9.4 10.2 92 14.4 14.2 101 RENO HILL 8400 17.1 15.9 108 18.8 17.3 109 ROACH 9700 17.2 18.4 93 20.1 20.4 99 SAND LAKE 10050 33.9 35.0 97 32.0 26.5 121 SOUTH PASS 9040 15.1 17.7 85 16.8 20.4 82 WINDY PEAK 7900 9.3 8.0 116 11.7 11.8 99 ----- ----- Basin wide percent of average 95 98 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 16.3 8.7 187 20.0 17.2 116 DIVIDE PEAK 8880 26.6 20.9 127 29.3 22.4 131 OLD BATTLE 10000 37.8 34.7 109 43.1 37.2 116 SANDSTONE RS 8150 21.4 13.4 160 22.6 20.1 112 WHISKEY PARK 8950 36.0 30.7 117 37.3 31.0 120 ----- ----- Basin wide percent of average 127 119 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.8 15.3 90 14.0 14.5 97 BLIND BULL SUM 8650 29.9 28.9 103 22.5 23.8 95 EAST RIM DIVIDE 7930 11.0 14.0 79 13.5 12.9 105 ELKHART PARK G.S. 9400 15.3 14.0 109 16.8 14.5 116 GROS VENTRE SUMMIT 8750 -M 14.6 * 17.2 14.0 123 GUNSIGHT PASS 9820 16.3 -M * 17.6 -M * KENDALL R.S. 7740 11.3 13.6 83 15.0 15.5 97 LOOMIS PARK 8240 17.7 17.1 104 20.3 18.7 109 NEW FORK LAKE 8340 12.8 11.3 113 12.0 12.3 98 SNIDER BASIN 8060 15.6 14.9 105 16.5 17.5 94 SPRING CREEK DIVIDE 9000 30.5 28.5 107 29.3 28.5 103 TRIPLE PEAK 8500 26.1 25.9 101 29.1 26.7 109 ----- ----- Basin wide percent of average 100 104 LOWER GREEN RIVER HAMS FORK 7840 13.0 10.0 130 14.0 13.4 104 HEWINTA 9519 13.3 12.3 108 15.4 16.2 95 HICKERSON PARK 9145 7.4 8.3 89 11.2 8.9 126 HOLE-IN-ROCK 9150 7.6 7.3 104 10.9 8.5 128 INDIAN CREEK 9425 27.8 29.6 94 25.0 27.6 91 KELLEY R.S. 8180 18.1 17.2 105 20.4 22.0 93 STEEL CREEK PARK 10200 15.6 17.3 90 18.9 18.3 103 ----- ----- Basin wide percent of average 101 101 UPPER BEAR RIVER BUG LAKE 7950 20.9 21.7 96 20.2 20.8 97 HAYDEN FORK 9212 19.3 16.5 117 24.9 23.1 108 KELLEY R.S. 8180 18.1 17.2 105 20.4 22.0 93 LILY LAKE 9156 17.5 14.5 121 19.5 19.4 101 MONTE CRISTO 8960 31.0 30.6 101 29.8 27.8 107 SALT RIVER SUMMIT 7760 16.1 14.4 112 18.2 20.3 90 TRIAL LAKE 9992 28.2 26.4 107 26.7 27.2 98 ----- ----- Basin wide percent of average 107 99 ----------------------------------------------------------------------------- -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.