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 15 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.7 17.0 57 13.6 22.9 59 COTTONWOOD CREEK 7670 16.3 23.9 68 22.2 29.6 75 GRAND TARGHEE 9260 39.9 -M * 29.9 -M * GRANITE CREEK 6770 9.9 17.2 58 12.7 21.0 60 GRASSY LAKE 7265 23.7 37.1 64 26.8 38.4 70 GROS VENTRE SUMMIT 8750 8.9 14.6 61 8.9 14.0 64 GUNSIGHT PASS 9820 9.8 -M * 10.9 -M * LEWIS LAKE DIVIDE 7850 19.8 36.7 54 22.0 39.2 56 PHILLIPS BENCH 8200 19.1 30.6 62 20.7 31.1 67 SALT RIVER SUMMIT 7760 11.0 14.5 76 12.9 20.2 64 SNAKE RIVER STATION 6920 7.3 17.7 41 17.1 23.9 72 SPRING CREEK DIVIDE 9000 19.3 28.4 68 18.4 28.4 65 THUMB DIVIDE 7980 10.9 18.8 58 13.6 20.4 67 TOGWOTEE PASS 9580 20.0 26.6 75 19.6 26.7 73 TWO OCEAN PLATEAU 9240 22.7 30.4 75 18.4 29.8 62 WILLOW CREEK 8380 23.4 31.8 74 28.0 34.7 81 ----- ----- Basin wide percent of average 64 67 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 14.6 25.4 57 13.7 21.7 63 BLACK BEAR 8170 27.6 40.9 67 26.5 43.2 61 CANYON 7870 8.8 14.0 63 11.1 16.5 67 FISHER CREEK 9100 25.1 37.0 68 23.5 39.0 60 MADISON PLATEAU 7750 16.8 26.2 64 20.4 28.8 71 NORTHEAST ENTRANCE 7350 6.0 10.8 56 9.1 13.6 67 PARKER PEAK 9400 19.5 23.3 84 13.3 17.7 75 SYLVAN LAKE 8420 14.6 24.2 60 18.0 22.6 80 THUMB DIVIDE 7980 10.9 18.8 58 13.6 20.4 67 TWO OCEAN PLATEAU 9240 22.7 30.4 75 18.4 29.8 62 WHISKEY CREEK 6800 10.4 17.8 58 12.9 22.5 57 WHITE MILL 8700 17.1 25.9 66 16.2 29.0 56 WOLVERINE 7650 7.6 11.1 68 7.6 13.8 55 ----- ----- Basin wide percent of average 66 64 WIND RIVER BURROUGHS CREEK 8750 -M 15.1 * -M 17.6 * COLD SPRINGS 9630 7.6 7.4 103 9.8 12.0 82 DEER PARK 9700 18.2 16.7 109 20.4 24.0 85 HOBBS PARK 10100 17.6 16.7 105 17.0 14.5 117 LITTLE WARM 9370 8.3 12.5 66 9.0 14.8 61 SOUTH PASS 9040 16.3 17.7 92 17.8 20.2 88 ST. LAWRENCE ALT 8620 9.3 7.4 126 11.1 10.1 110 TOGWOTEE PASS 9580 20.0 26.6 75 19.6 26.7 73 TOWNSEND CREEK 8700 13.0 9.8 133 15.9 13.3 120 ----- ----- Basin wide percent of average 96 89 BIGHORN BASIN BALD MTN. 9380 14.4 21.7 66 11.7 19.0 62 BEAR TRAP MEADOW 8200 7.9 4.7 168 9.0 9.3 97 BLACKWATER 9780 18.4 26.7 69 16.8 22.5 75 BONE SPRINGS DIV 9350 12.7 17.6 72 10.6 16.2 65 EVENING STAR 9200 20.5 31.9 64 21.6 27.4 79 GRAVE SPRINGS 8550 9.7 10.5 92 11.0 11.3 97 KIRWIN 9550 10.1 12.3 82 9.7 12.4 78 MARQUETTE 8760 7.9 10.4 76 8.7 11.3 77 MIDDLE POWDER 7760 11.4 13.9 82 9.2 13.7 67 OWL CREEK 8975 5.7 5.2 110 5.5 6.8 81 POWDER RIVER PASS 9480 9.7 11.8 82 11.6 13.7 85 SHELL CREEK 9580 12.1 16.0 76 10.9 14.7 74 SYLVAN LAKE 8420 14.6 24.2 60 18.0 22.6 80 SYLVAN ROAD 7120 6.8 12.3 55 12.8 18.9 68 TIMBER CREEK 7950 5.0 5.6 89 6.7 8.5 79 YOUNTS PEAK 8350 11.1 18.0 62 9.7 17.4 56 ----- ----- Basin wide percent of average 73 75 SHOSHONE RIVER BLACKWATER 9780 18.4 26.7 69 16.8 22.5 75 EVENING STAR 9200 20.5 31.9 64 21.6 27.4 79 KIRWIN 9550 10.1 12.3 82 9.7 12.4 78 MARQUETTE 8760 7.9 10.4 76 8.7 11.3 77 SYLVAN LAKE 8420 14.6 24.2 60 18.0 22.6 80 SYLVAN ROAD 7120 6.8 12.3 55 12.8 18.9 68 YOUNTS PEAK 8350 11.1 18.0 62 9.7 17.4 56 ----- ----- Basin wide percent of average 66 73 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.9 4.7 168 9.0 9.3 97 BIG GOOSE 7990 9.4 12.3 76 10.8 10.4 104 BONE SPRINGS DIV 9350 12.7 17.6 72 10.6 16.2 65 BURGESS JUNCTION 7880 10.7 13.2 81 10.7 13.5 79 CLOUD PEAK RESERVOIR 9860 13.3 15.1 88 11.6 14.5 80 DOME LAKE 8880 9.1 13.9 65 11.7 14.6 80 GRAVE SPRINGS 8550 9.7 10.5 92 11.0 11.3 97 HANSEN SAWMILL 8360 6.5 6.1 107 7.8 9.3 84 MIDDLE POWDER 7760 11.4 13.9 82 9.2 13.7 67 POWDER RIVER PASS 9480 9.7 11.8 82 11.6 13.7 85 SUCKER CREEK 8880 12.2 13.4 91 13.4 15.1 89 TIE CREEK 6870 2.7 5.1 53 10.1 11.3 89 ----- ----- Basin wide percent of average 84 83 BELLE FOURCHE BLIND PARK 6890 5.0 7.7 65 12.2 12.2 100 COLE CANYON 5910 5.2 7.1 73 10.2 7.6 134 NORTH RAPID CREEK 6130 5.3 8.8 60 11.0 9.5 116 ----- ----- Basin wide percent of average 66 114 UPPER N. PLATTE RIVER COLUMBINE 9160 20.6 24.8 83 23.3 27.1 86 DIVIDE PEAK 8880 23.4 20.8 113 25.4 22.3 114 ELK RIVER 8700 19.9 19.8 101 21.1 21.1 100 JOE WRIGHT 10120 20.2 23.5 86 22.5 27.0 83 NORTH FRENCH CREEK 10130 38.2 32.4 118 35.8 26.7 134 OLD BATTLE 10000 35.6 34.5 103 38.4 37.0 104 SAGE CREEK BASIN 7850 17.2 12.1 142 13.9 12.9 108 SOUTH BRUSH CREEK 8440 14.0 13.3 105 19.4 18.0 108 TOWER 10500 -M 49.3 * -M 41.4 * WEBBER SPRINGS 9250 25.3 26.2 97 29.6 28.8 103 WILLOW CREEK PASS 9540 9.2 13.5 68 11.6 14.0 83 ----- ----- Basin wide percent of average 101 103 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.4 26.3 85 23.5 24.2 97 CASPER MTN. 7900 17.4 16.6 105 16.8 16.5 102 DEADMAN HILL 10220 21.7 18.2 119 18.6 18.6 100 DEER PARK 9700 18.2 16.7 109 20.4 24.0 85 LAPRELE CREEK 8375 10.5 10.4 101 14.6 14.1 104 RENO HILL 8400 17.5 15.8 111 19.5 17.1 114 ROACH 9700 18.4 18.4 100 21.7 20.3 107 SAND LAKE 10050 32.8 34.9 94 32.3 26.4 122 SOUTH PASS 9040 16.3 17.7 92 17.8 20.2 88 WINDY PEAK 7900 9.9 8.1 122 12.6 11.7 108 ----- ----- Basin wide percent of average 101 102 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 10.6 8.9 119 15.6 17.1 91 DIVIDE PEAK 8880 23.4 20.8 113 25.4 22.3 114 OLD BATTLE 10000 35.6 34.5 103 38.4 37.0 104 SANDSTONE RS 8150 14.7 13.6 108 18.1 20.0 91 WHISKEY PARK 8950 27.2 30.7 89 31.8 30.9 103 ----- ----- Basin wide percent of average 103 102 UPPER GREEN RIVER BIG SANDY OPENING 9080 11.0 15.3 72 10.3 14.4 72 BLIND BULL SUM 8650 17.1 28.9 59 12.5 23.7 53 EAST RIM DIVIDE 7930 6.8 13.9 49 7.6 12.9 59 ELKHART PARK G.S. 9400 9.4 14.0 67 9.9 14.5 68 GROS VENTRE SUMMIT 8750 8.9 14.6 61 8.9 14.0 64 GUNSIGHT PASS 9820 9.8 -M * 10.9 -M * KENDALL R.S. 7740 6.5 13.7 47 8.9 15.5 57 LOOMIS PARK 8240 9.1 17.2 53 11.3 18.6 61 NEW FORK LAKE 8340 6.7 11.4 59 7.1 12.2 58 POCKET CREEK 9360 9.1 -M * 11.9 -M * SNIDER BASIN 8060 10.2 15.0 68 11.3 17.4 65 SPRING CREEK DIVIDE 9000 19.3 28.4 68 18.4 28.4 65 TRIPLE PEAK 8500 18.4 25.9 71 19.9 26.6 75 ----- ----- Basin wide percent of average 62 64 LOWER GREEN RIVER HAMS FORK 7840 9.3 10.2 91 10.0 13.3 75 HEWINTA 9519 11.3 12.4 91 12.6 16.1 78 HICKERSON PARK 9145 8.6 8.3 104 11.3 8.9 127 HOLE-IN-ROCK 9150 7.5 7.3 103 10.5 8.4 125 INDIAN CREEK 9425 19.8 29.6 67 17.5 27.5 64 KELLEY R.S. 8180 12.2 17.3 71 14.6 22.0 66 STEEL CREEK PARK 10200 14.0 17.2 81 15.8 18.2 87 ----- ----- Basin wide percent of average 81 81 UPPER BEAR RIVER BUG LAKE 7950 12.1 21.7 56 15.7 20.7 76 HAYDEN FORK 9212 13.9 16.6 84 18.1 22.9 79 KELLEY R.S. 8180 12.2 17.3 71 14.6 22.0 66 LILY LAKE 9156 13.0 14.5 90 14.5 19.2 76 MONTE CRISTO 8960 21.1 30.6 69 20.0 27.7 72 SALT RIVER SUMMIT 7760 11.0 14.5 76 12.9 20.2 64 TRIAL LAKE 9992 18.1 26.3 69 15.7 27.0 58 ----- ----- Basin wide percent of average 72 70 ----------------------------------------------------------------------------- -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 1971-2000. 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.