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 3 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.3 18.1 51 11.8 21.8 54 COTTONWOOD CREEK 7670 15.6 24.2 64 19.6 27.9 70 GRAND TARGHEE 9260 36.0 -M * 27.0 -M * GRANITE CREEK 6770 9.0 18.6 48 11.2 20.2 55 GRASSY LAKE 7265 -M 36.3 * -M 36.6 * GROS VENTRE SUMMIT 8750 7.8 14.4 54 7.4 13.1 56 GUNSIGHT PASS 9820 7.8 -M * 9.2 -M * LEWIS LAKE DIVIDE 7850 17.5 36.0 49 19.6 37.3 53 PHILLIPS BENCH 8200 16.8 29.4 57 18.1 29.5 61 SALT RIVER SUMMIT 7760 9.5 14.7 65 11.1 19.1 58 SNAKE RIVER STATION 6920 7.4 19.2 39 15.3 22.6 68 SPRING CREEK DIVIDE 9000 16.8 27.1 62 16.1 26.9 60 THUMB DIVIDE 7980 9.6 19.3 50 12.2 19.2 64 TOGWOTEE PASS 9580 17.9 25.3 71 17.8 25.0 71 TWO OCEAN PLATEAU 9240 20.0 28.6 70 16.4 28.1 58 WILLOW CREEK 8380 20.8 30.8 68 24.5 32.7 75 ----- ----- Basin wide percent of average 58 62 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 13.6 23.7 57 12.6 20.4 62 BLACK BEAR 8170 24.2 39.8 61 23.6 41.1 57 CANYON 7870 8.2 13.9 59 9.9 15.7 63 FISHER CREEK 9100 22.7 35.5 64 21.5 37.0 58 MADISON PLATEAU 7750 15.0 25.5 59 18.2 27.2 67 NORTHEAST ENTRANCE 7350 5.5 11.3 49 8.3 12.9 64 PARKER PEAK 9400 17.8 22.0 81 12.3 16.5 75 SYLVAN LAKE 8420 13.5 22.9 59 16.1 21.2 76 THUMB DIVIDE 7980 9.6 19.3 50 12.2 19.2 64 TWO OCEAN PLATEAU 9240 20.0 28.6 70 16.4 28.1 58 WHISKEY CREEK 6800 9.3 17.5 53 11.4 21.3 54 WHITE MILL 8700 15.7 24.7 64 14.7 27.4 54 WOLVERINE 7650 7.2 11.7 62 7.0 13.0 54 ----- ----- Basin wide percent of average 62 61 WIND RIVER BURROUGHS CREEK 8750 8.2 14.8 55 6.7 16.5 41 COLD SPRINGS 9630 7.2 9.0 80 8.7 10.8 81 DEER PARK 9700 14.8 17.3 86 16.4 22.2 74 HOBBS PARK 10100 15.2 15.3 99 14.5 13.0 112 LITTLE WARM 9370 7.5 12.1 62 7.9 13.6 58 SOUTH PASS 9040 13.3 16.9 79 14.4 18.7 77 ST. LAWRENCE ALT 8620 7.9 7.4 107 9.8 9.0 109 TOGWOTEE PASS 9580 17.9 25.3 71 17.8 25.0 71 TOWNSEND CREEK 8700 11.3 9.0 126 13.3 11.8 113 ----- ----- Basin wide percent of average 81 78 BIGHORN BASIN BALD MTN. 9380 13.7 20.0 69 10.9 17.6 62 BEAR TRAP MEADOW 8200 7.0 5.2 135 7.7 8.4 92 BLACKWATER 9780 16.3 24.9 65 15.0 20.8 72 BONE SPRINGS DIV 9350 11.8 16.5 72 9.7 14.8 66 EVENING STAR 9200 19.0 30.2 63 20.0 25.7 78 GRAVE SPRINGS 8550 9.3 9.5 98 10.1 9.8 103 KIRWIN 9550 9.0 11.5 78 8.6 11.4 75 MARQUETTE 8760 7.2 9.1 79 8.0 9.9 81 MIDDLE POWDER 7760 10.8 11.9 91 8.5 12.5 68 OWL CREEK 8975 6.1 5.6 109 4.9 6.0 82 POWDER RIVER PASS 9480 9.1 11.0 83 10.3 12.5 82 SHELL CREEK 9580 11.3 14.9 76 10.1 13.5 75 SYLVAN LAKE 8420 13.5 22.9 59 16.1 21.2 76 SYLVAN ROAD 7120 7.1 12.9 55 11.5 17.9 64 TIMBER CREEK 7950 4.6 5.8 79 6.1 7.5 81 YOUNTS PEAK 8350 10.1 17.4 58 8.6 16.4 52 ----- ----- Basin wide percent of average 72 74 SHOSHONE RIVER BLACKWATER 9780 16.3 24.9 65 15.0 20.8 72 EVENING STAR 9200 19.0 30.2 63 20.0 25.7 78 KIRWIN 9550 9.0 11.5 78 8.6 11.4 75 MARQUETTE 8760 7.2 9.1 79 8.0 9.9 81 SYLVAN LAKE 8420 13.5 22.9 59 16.1 21.2 76 SYLVAN ROAD 7120 7.1 12.9 55 11.5 17.9 64 YOUNTS PEAK 8350 10.1 17.4 58 8.6 16.4 52 ----- ----- Basin wide percent of average 64 71 POWDER-TONGUE BEAR TRAP MEADOW 8200 7.0 5.2 135 7.7 8.4 92 BIG GOOSE 7990 8.6 10.8 80 9.9 8.6 115 BONE SPRINGS DIV 9350 11.8 16.5 72 9.7 14.8 66 BURGESS JUNCTION 7880 10.6 11.8 90 10.0 12.3 81 CLOUD PEAK RESERVOIR 9860 11.9 13.6 88 9.9 13.0 76 DOME LAKE 8880 8.9 12.7 70 10.9 13.3 82 GRAVE SPRINGS 8550 9.3 9.5 98 10.1 9.8 103 HANSEN SAWMILL 8360 5.6 6.5 86 6.5 8.3 78 MIDDLE POWDER 7760 10.8 11.9 91 8.5 12.5 68 POWDER RIVER PASS 9480 9.1 11.0 83 10.3 12.5 82 SUCKER CREEK 8880 12.1 11.9 102 12.5 13.7 91 TIE CREEK 6870 3.1 6.1 51 9.3 10.0 93 ----- ----- Basin wide percent of average 85 84 BELLE FOURCHE BLIND PARK 6890 5.6 8.6 65 11.1 11.2 99 COLE CANYON 5910 6.4 6.9 93 9.7 6.7 145 NORTH RAPID CREEK 6130 8.0 8.4 95 10.2 8.6 119 ----- ----- Basin wide percent of average 84 117 UPPER N. PLATTE RIVER COLUMBINE 9160 18.8 25.1 75 20.3 25.5 80 DIVIDE PEAK 8880 21.6 20.1 107 22.6 20.9 108 ELK RIVER 8700 18.5 19.7 94 19.1 19.8 96 JOE WRIGHT 10120 18.1 21.6 84 20.4 25.0 82 NORTH FRENCH CREEK 10130 35.5 29.8 119 33.6 24.9 135 OLD BATTLE 10000 31.9 32.6 98 34.0 34.9 97 SAGE CREEK BASIN 7850 16.3 11.7 139 11.7 12.1 97 SOUTH BRUSH CREEK 8440 14.2 13.2 108 18.1 16.6 109 TOWER 10500 34.2 46.1 74 30.4 38.8 78 WEBBER SPRINGS 9250 22.8 26.4 86 26.2 27.0 97 WILLOW CREEK PASS 9540 7.7 12.2 63 10.1 13.0 78 ----- ----- Basin wide percent of average 93 95 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 20.8 24.1 86 21.9 22.3 98 CASPER MTN. 7900 15.7 14.7 107 14.6 14.6 100 DEADMAN HILL 10220 19.0 16.6 114 16.7 17.1 98 DEER PARK 9700 14.8 17.3 86 16.4 22.2 74 LAPRELE CREEK 8375 10.2 11.0 93 12.8 12.7 101 RENO HILL 8400 16.8 14.4 117 17.5 15.1 116 ROACH 9700 16.9 17.3 98 19.8 18.8 105 SAND LAKE 10050 30.7 32.9 93 30.1 24.4 123 SOUTH PASS 9040 13.3 16.9 79 14.4 18.7 77 WINDY PEAK 7900 9.2 8.2 112 11.0 10.6 104 ----- ----- Basin wide percent of average 97 99 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 10.3 10.9 94 13.2 16.0 83 DIVIDE PEAK 8880 21.6 20.1 107 22.6 20.9 108 OLD BATTLE 10000 31.9 32.6 98 34.0 34.9 97 SANDSTONE RS 8150 12.9 14.7 88 16.0 18.9 85 WHISKEY PARK 8950 27.1 30.5 89 28.2 29.0 97 ----- ----- Basin wide percent of average 95 95 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.6 14.7 59 8.2 13.5 61 BLIND BULL SUM 8650 14.8 28.4 52 10.9 22.6 48 EAST RIM DIVIDE 7930 5.1 13.4 38 6.3 12.2 52 ELKHART PARK G.S. 9400 8.2 13.6 60 8.5 13.5 63 GROS VENTRE SUMMIT 8750 7.8 14.4 54 7.4 13.1 56 GUNSIGHT PASS 9820 7.8 -M * 9.2 -M * KENDALL R.S. 7740 5.6 14.5 39 7.5 14.8 51 LOOMIS PARK 8240 7.5 17.5 43 9.3 17.7 53 NEW FORK LAKE 8340 5.5 11.4 48 5.8 11.5 50 POCKET CREEK 9360 7.4 -M * 10.3 -M * SNIDER BASIN 8060 8.9 14.8 60 9.9 16.4 60 SPRING CREEK DIVIDE 9000 16.8 27.1 62 16.1 26.9 60 TRIPLE PEAK 8500 16.6 25.3 66 17.5 25.2 69 ----- ----- Basin wide percent of average 54 57 LOWER GREEN RIVER HAMS FORK 7840 7.6 11.9 64 8.8 12.4 71 HEWINTA 9519 9.5 12.2 78 11.2 14.8 76 HICKERSON PARK 9145 8.0 7.8 103 10.8 8.0 135 HOLE-IN-ROCK 9150 7.8 7.2 108 9.8 7.6 129 INDIAN CREEK 9425 17.6 28.4 62 15.2 25.9 59 KELLEY R.S. 8180 10.1 17.2 59 12.1 20.7 58 STEEL CREEK PARK 10200 12.2 16.0 76 14.2 16.5 86 ----- ----- Basin wide percent of average 72 78 UPPER BEAR RIVER BUG LAKE 7950 8.9 21.3 42 13.2 19.5 68 HAYDEN FORK 9212 11.5 16.7 69 15.7 21.3 74 KELLEY R.S. 8180 10.1 17.2 59 12.1 20.7 58 LILY LAKE 9156 11.3 13.7 82 12.7 17.7 72 MONTE CRISTO 8960 17.5 30.2 58 16.9 25.9 65 SALT RIVER SUMMIT 7760 9.5 14.7 65 11.1 19.1 58 TRIAL LAKE 9992 14.9 25.4 59 13.2 25.3 52 ----- ----- Basin wide percent of average 60 63 ----------------------------------------------------------------------------- -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.