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 SUNDAY: APRIL 20 , 2008 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 -M 15.7 * -M 23.4 * COTTONWOOD CREEK 7670 26.3 22.9 115 27.1 30.4 89 GRAND TARGHEE 9260 52.3 -M * 36.5 -M * GRANITE CREEK 6770 18.4 15.9 116 24.5 21.5 114 GRASSY LAKE 7265 38.2 36.5 105 45.4 39.3 116 GROS VENTRE SUMMIT 8750 13.1 14.4 91 15.0 14.4 104 GUNSIGHT PASS 9820 12.5 -M * 15.4 -M * LEWIS LAKE DIVIDE 7850 37.9 36.5 104 40.2 40.1 100 PHILLIPS BENCH 8200 36.3 30.7 118 37.4 31.8 118 SALT RIVER SUMMIT 7760 13.2 13.6 97 17.3 20.7 84 SNAKE RIVER STATION 6920 19.8 16.2 122 29.1 24.5 119 SPRING CREEK DIVIDE 9000 23.2 28.8 81 25.5 29.0 88 THUMB DIVIDE 7980 18.8 17.8 106 22.3 20.9 107 TOGWOTEE PASS 9580 29.0 27.2 107 31.7 27.5 115 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 30.6 * WILLOW CREEK 8380 33.7 31.9 106 41.3 35.7 116 ----- ----- Basin wide percent of average 105 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 27.2 25.6 106 25.5 22.3 114 BLACK BEAR 8170 -M 40.9 * 45.2 44.1 102 CANYON 7870 18.3 13.2 139 22.1 16.9 131 FISHER CREEK 9100 43.9 37.4 117 40.7 40.0 102 MADISON PLATEAU 7750 32.3 25.9 125 34.0 29.4 116 NORTHEAST ENTRANCE 7350 10.2 9.7 105 14.6 14.0 104 PARKER PEAK 9400 29.5 23.7 124 -M 18.3 * SYLVAN LAKE 8420 22.6 24.1 94 28.3 23.3 121 THUMB DIVIDE 7980 18.8 17.8 106 22.3 20.9 107 TWO OCEAN PLATEAU 9240 -M 31.2 * -M 30.6 * WHISKEY CREEK 6800 19.5 17.4 112 26.1 23.1 113 WHITE MILL 8700 29.8 26.2 114 29.7 29.7 100 WOLVERINE 7650 10.2 10.0 102 15.0 14.3 105 ----- ----- Basin wide percent of average 114 109 WIND RIVER BURROUGHS CREEK 8750 16.7 14.9 112 20.0 18.2 110 COLD SPRINGS 9630 6.2 5.9 105 11.0 12.6 87 DEER PARK 9700 16.4 18.0 91 21.9 25.0 88 HOBBS PARK 10100 15.2 17.0 89 16.5 15.3 108 LITTLE WARM 9370 10.1 12.2 83 14.9 15.4 97 SOUTH PASS 9040 14.4 17.9 80 18.9 21.1 90 ST. LAWRENCE ALT 8620 6.5 6.7 97 9.1 10.8 84 TOGWOTEE PASS 9580 29.0 27.2 107 31.7 27.5 115 TOWNSEND CREEK 8700 8.8 9.6 92 13.2 14.0 94 ----- ----- Basin wide percent of average 95 98 BIGHORN BASIN BALD MTN. 9380 17.8 22.5 79 16.8 19.8 85 BEAR TRAP MEADOW 8200 8.4 3.8 221 10.0 9.9 101 BLACKWATER 9780 28.3 27.3 104 25.9 23.3 111 BONE SPRINGS DIV 9350 19.1 17.7 108 19.3 16.9 114 EVENING STAR 9200 32.6 32.4 101 36.6 28.3 129 GRAVE SPRINGS 8550 10.7 11.0 97 11.4 11.9 96 KIRWIN 9550 13.3 12.5 106 15.7 13.0 121 MARQUETTE 8760 7.2 10.7 67 11.0 12.1 91 MIDDLE POWDER 7760 13.0 14.3 91 10.5 14.4 73 OWL CREEK 8975 4.0 4.9 82 7.4 7.2 103 POWDER RIVER PASS 9480 13.1 11.7 112 15.7 14.4 109 SHELL CREEK 9580 17.3 16.3 106 16.8 15.4 109 SYLVAN LAKE 8420 22.6 24.1 94 28.3 23.3 121 SYLVAN ROAD 7120 12.3 11.1 111 22.7 19.5 116 TIMBER CREEK 7950 5.0 5.4 93 8.8 9.1 97 YOUNTS PEAK 8350 18.2 18.2 100 19.0 17.9 106 ----- ----- Basin wide percent of average 100 108 SHOSHONE RIVER BLACKWATER 9780 28.3 27.3 104 25.9 23.3 111 EVENING STAR 9200 32.6 32.4 101 36.6 28.3 129 KIRWIN 9550 13.3 12.5 106 15.7 13.0 121 MARQUETTE 8760 7.2 10.7 67 11.0 12.1 91 SYLVAN LAKE 8420 22.6 24.1 94 28.3 23.3 121 SYLVAN ROAD 7120 12.3 11.1 111 22.7 19.5 116 YOUNTS PEAK 8350 18.2 18.2 100 19.0 17.9 106 ----- ----- Basin wide percent of average 99 116 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.4 3.8 221 10.0 9.9 101 BIG GOOSE 7990 10.2 12.5 82 14.1 11.4 124 BONE SPRINGS DIV 9350 19.1 17.7 108 19.3 16.9 114 BURGESS JUNCTION 7880 14.5 13.3 109 15.7 14.1 111 CLOUD PEAK RESERVOIR 9860 17.2 15.7 110 17.5 15.4 114 DOME LAKE 8880 12.8 13.8 93 16.9 15.4 110 GRAVE SPRINGS 8550 10.7 11.0 97 11.4 11.9 96 HANSEN SAWMILL 8360 6.7 5.7 118 10.6 9.8 108 MIDDLE POWDER 7760 13.0 14.3 91 10.5 14.4 73 POWDER RIVER PASS 9480 13.1 11.7 112 15.7 14.4 109 SUCKER CREEK 8880 16.3 13.5 121 19.1 15.9 120 TIE CREEK 6870 7.9 5.2 152 13.4 12.0 112 ----- ----- Basin wide percent of average 108 108 BELLE FOURCHE BLIND PARK 6890 8.0 7.0 114 12.7 12.9 98 COLE CANYON 5910 6.4 6.8 94 9.4 8.1 116 NORTH RAPID CREEK 6130 9.4 8.1 116 11.2 10.0 112 ----- ----- Basin wide percent of average 109 107 UPPER N. PLATTE RIVER COLUMBINE 9160 28.5 24.0 119 31.4 27.8 113 DIVIDE PEAK 8880 25.1 20.9 120 26.2 23.0 114 ELK RIVER 8700 26.2 18.7 140 25.6 21.8 117 JOE WRIGHT 10120 27.5 24.3 113 31.5 28.1 112 NORTH FRENCH CREEK 10130 34.8 33.4 104 33.1 27.7 119 OLD BATTLE 10000 37.8 35.4 107 44.0 38.0 116 SAGE CREEK BASIN 7850 18.7 12.1 155 19.1 13.3 144 SOUTH BRUSH CREEK 8440 14.2 12.9 110 19.3 18.7 103 TOWER 10500 48.2 50.6 95 45.7 42.8 107 WEBBER SPRINGS 9250 29.8 26.0 115 34.4 29.6 116 WILLOW CREEK PASS 9540 20.1 14.0 144 18.9 14.6 129 ----- ----- Basin wide percent of average 114 115 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.9 27.3 88 25.2 25.2 100 CASPER MTN. 7900 15.2 17.3 88 16.5 17.5 94 DEADMAN HILL 10220 20.5 18.9 108 22.1 19.4 114 DEER PARK 9700 16.4 18.0 91 21.9 25.0 88 LAPRELE CREEK 8375 7.7 9.5 81 13.4 14.9 90 RENO HILL 8400 15.1 16.0 94 18.6 18.2 102 ROACH 9700 21.8 18.5 118 25.1 21.0 120 SAND LAKE 10050 32.8 35.7 92 33.1 27.4 121 SOUTH PASS 9040 14.4 17.9 80 18.9 21.1 90 WINDY PEAK 7900 9.2 7.3 126 11.7 12.3 95 ----- ----- Basin wide percent of average 95 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 13.2 7.5 176 18.4 17.6 105 DIVIDE PEAK 8880 25.1 20.9 120 26.2 23.0 114 OLD BATTLE 10000 37.8 35.4 107 44.0 38.0 116 SANDSTONE RS 8150 17.6 12.6 140 23.7 20.6 115 WHISKEY PARK 8950 39.4 30.6 129 39.1 31.9 123 ----- ----- Basin wide percent of average 124 115 UPPER GREEN RIVER BIG SANDY OPENING 9080 13.5 15.1 89 14.4 14.9 97 BLIND BULL SUM 8650 27.6 28.8 96 19.2 24.2 79 EAST RIM DIVIDE 7930 9.3 14.0 66 12.0 13.2 91 ELKHART PARK G.S. 9400 11.3 13.9 81 12.7 14.9 85 GROS VENTRE SUMMIT 8750 13.1 14.4 91 15.0 14.4 104 GUNSIGHT PASS 9820 12.5 -M * 15.4 -M * KENDALL R.S. 7740 11.5 12.8 90 14.7 15.8 93 LOOMIS PARK 8240 15.6 16.5 95 18.9 19.0 99 NEW FORK LAKE 8340 9.4 10.8 87 10.3 12.6 82 SNIDER BASIN 8060 13.5 14.6 92 15.4 17.8 87 SPRING CREEK DIVIDE 9000 23.2 28.8 81 25.5 29.0 88 TRIPLE PEAK 8500 24.9 25.7 97 30.6 27.3 112 ----- ----- Basin wide percent of average 88 93 LOWER GREEN RIVER HAMS FORK 7840 11.7 8.9 131 11.2 13.8 81 HEWINTA 9519 15.8 11.7 135 18.9 16.7 113 HICKERSON PARK 9145 7.3 7.8 94 11.3 9.3 122 HOLE-IN-ROCK 9150 6.8 6.7 101 11.6 8.9 130 INDIAN CREEK 9425 27.1 29.6 92 -M 28.2 * KELLEY R.S. 8180 15.2 16.6 92 19.2 22.5 85 STEEL CREEK PARK 10200 18.5 17.7 105 20.8 19.0 109 ----- ----- Basin wide percent of average 103 103 UPPER BEAR RIVER BUG LAKE 7950 18.1 21.1 86 18.2 21.3 85 HAYDEN FORK 9212 18.4 15.8 116 25.5 23.7 108 KELLEY R.S. 8180 15.2 16.6 92 19.2 22.5 85 LILY LAKE 9156 14.5 13.8 105 20.0 19.9 101 MONTE CRISTO 8960 31.1 30.3 103 28.3 28.5 99 SALT RIVER SUMMIT 7760 13.2 13.6 97 17.3 20.7 84 TRIAL LAKE 9992 24.1 26.5 91 26.5 27.9 95 ----- ----- Basin wide percent of average 98 94 ----------------------------------------------------------------------------- -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.