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 22 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 5.6 15.4 36 13.5 23.5 57 COTTONWOOD CREEK 7670 14.5 22.7 64 22.7 30.5 74 GRAND TARGHEE 9260 40.9 -M * 30.3 -M * GRANITE CREEK 6770 7.1 15.7 45 12.8 21.6 59 GRASSY LAKE 7265 20.5 36.3 56 27.1 39.4 69 GROS VENTRE SUMMIT 8750 7.3 14.4 51 9.0 14.5 62 GUNSIGHT PASS 9820 8.0 -M * 11.0 -M * LEWIS LAKE DIVIDE 7850 17.5 36.4 48 22.5 40.3 56 PHILLIPS BENCH 8200 16.9 30.6 55 20.9 31.9 66 SALT RIVER SUMMIT 7760 7.9 13.4 59 13.2 20.8 63 SNAKE RIVER STATION 6920 4.4 15.9 28 17.3 24.6 70 SPRING CREEK DIVIDE 9000 18.8 28.9 65 18.9 29.1 65 THUMB DIVIDE 7980 8.2 17.6 47 13.8 21.0 66 TOGWOTEE PASS 9580 18.2 27.3 67 19.7 27.6 71 TWO OCEAN PLATEAU 9240 22.0 31.3 70 18.6 30.7 61 WILLOW CREEK 8380 18.7 31.9 59 28.3 35.9 79 ----- ----- Basin wide percent of average 56 66 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 14.4 25.7 56 14.1 22.4 63 BLACK BEAR 8170 25.6 40.9 63 26.7 44.3 60 CANYON 7870 7.1 13.0 55 11.1 17.0 65 FISHER CREEK 9100 21.6 37.6 57 23.7 40.2 59 MADISON PLATEAU 7750 15.2 25.8 59 20.5 29.5 69 NORTHEAST ENTRANCE 7350 .5 9.5 5 9.1 14.1 65 PARKER PEAK 9400 17.8 23.9 74 13.6 18.4 74 SYLVAN LAKE 8420 12.2 24.2 50 18.1 23.5 77 THUMB DIVIDE 7980 8.2 17.6 47 13.8 21.0 66 TWO OCEAN PLATEAU 9240 22.0 31.3 70 18.6 30.7 61 WHISKEY CREEK 6800 9.6 17.3 55 12.9 23.2 56 WHITE MILL 8700 15.9 26.3 60 16.4 29.9 55 WOLVERINE 7650 2.0 9.8 20 7.7 14.4 53 ----- ----- Basin wide percent of average 57 63 WIND RIVER BURROUGHS CREEK 8750 8.6 14.8 58 8.9 18.3 49 COLD SPRINGS 9630 5.3 5.8 91 10.5 12.7 83 DEER PARK 9700 16.5 17.9 92 20.6 25.2 82 HOBBS PARK 10100 16.2 17.1 95 17.5 15.5 113 LITTLE WARM 9370 6.6 12.1 55 9.2 15.6 59 SOUTH PASS 9040 13.7 17.9 77 18.0 21.2 85 ST. LAWRENCE ALT 8620 6.1 6.6 92 11.6 10.9 106 TOGWOTEE PASS 9580 18.2 27.3 67 19.7 27.6 71 TOWNSEND CREEK 8700 10.1 9.6 105 15.9 14.2 112 ----- ----- Basin wide percent of average 78 82 BIGHORN BASIN BALD MTN. 9380 13.3 22.6 59 11.9 19.9 60 BEAR TRAP MEADOW 8200 5.1 3.7 138 9.0 10.0 90 BLACKWATER 9780 18.0 27.4 66 17.1 23.4 73 BONE SPRINGS DIV 9350 9.8 17.8 55 10.7 17.0 63 EVENING STAR 9200 18.0 32.4 56 21.7 28.5 76 GRAVE SPRINGS 8550 8.0 11.0 73 11.0 12.0 92 KIRWIN 9550 9.2 12.5 74 10.4 13.1 79 MARQUETTE 8760 7.0 10.7 65 9.5 12.2 78 MIDDLE POWDER 7760 10.1 14.3 71 9.3 14.5 64 OWL CREEK 8975 2.3 4.7 49 5.9 7.3 81 POWDER RIVER PASS 9480 7.4 11.7 63 11.7 14.5 81 SHELL CREEK 9580 11.5 16.3 71 11.0 15.5 71 SYLVAN LAKE 8420 12.2 24.2 50 18.1 23.5 77 SYLVAN ROAD 7120 1.1 10.7 10 12.7 19.5 65 TIMBER CREEK 7950 2.9 5.2 56 7.0 9.2 76 YOUNTS PEAK 8350 10.6 18.2 58 10.2 18.0 57 ----- ----- Basin wide percent of average 60 73 SHOSHONE RIVER BLACKWATER 9780 18.0 27.4 66 17.1 23.4 73 EVENING STAR 9200 18.0 32.4 56 21.7 28.5 76 KIRWIN 9550 9.2 12.5 74 10.4 13.1 79 MARQUETTE 8760 7.0 10.7 65 9.5 12.2 78 SYLVAN LAKE 8420 12.2 24.2 50 18.1 23.5 77 SYLVAN ROAD 7120 1.1 10.7 10 12.7 19.5 65 YOUNTS PEAK 8350 10.6 18.2 58 10.2 18.0 57 ----- ----- Basin wide percent of average 56 72 POWDER-TONGUE BEAR TRAP MEADOW 8200 5.1 3.7 138 9.0 10.0 90 BIG GOOSE 7990 8.1 12.5 65 10.9 11.5 95 BONE SPRINGS DIV 9350 9.8 17.8 55 10.7 17.0 63 BURGESS JUNCTION 7880 9.8 13.3 74 10.8 14.2 76 CLOUD PEAK RESERVOIR 9860 12.0 15.8 76 12.0 15.5 77 DOME LAKE 8880 7.5 13.8 54 11.8 15.5 76 GRAVE SPRINGS 8550 8.0 11.0 73 11.0 12.0 92 HANSEN SAWMILL 8360 4.1 5.6 73 7.9 9.9 80 MIDDLE POWDER 7760 10.1 14.3 71 9.3 14.5 64 POWDER RIVER PASS 9480 7.4 11.7 63 11.7 14.5 81 SUCKER CREEK 8880 10.6 13.5 79 13.5 16.0 84 TIE CREEK 6870 .0 5.2 0 10.1 12.2 83 ----- ----- Basin wide percent of average 67 79 BELLE FOURCHE BLIND PARK 6890 .0 6.8 0 12.2 13.0 94 COLE CANYON 5910 1.5 6.7 22 10.6 8.2 129 NORTH RAPID CREEK 6130 .6 7.8 8 11.2 10.1 111 ----- ----- Basin wide percent of average 10 109 UPPER N. PLATTE RIVER COLUMBINE 9160 16.1 23.8 68 23.6 28.0 84 DIVIDE PEAK 8880 19.7 20.8 95 25.6 23.1 111 ELK RIVER 8700 13.3 18.5 72 21.4 21.9 98 JOE WRIGHT 10120 19.2 24.4 79 23.1 28.3 82 NORTH FRENCH CREEK 10130 36.1 33.6 107 36.3 27.9 130 OLD BATTLE 10000 35.8 35.6 101 38.7 38.1 102 SAGE CREEK BASIN 7850 12.1 12.1 100 13.9 13.4 104 SOUTH BRUSH CREEK 8440 10.1 12.8 79 19.7 18.8 105 TOWER 10500 36.4 50.8 72 35.4 43.0 82 WEBBER SPRINGS 9250 22.3 26.0 86 29.7 29.7 100 WILLOW CREEK PASS 9540 8.3 14.1 59 11.7 14.7 80 ----- ----- Basin wide percent of average 84 97 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 21.5 27.5 78 23.6 25.3 93 CASPER MTN. 7900 15.3 17.4 88 16.7 17.7 94 DEADMAN HILL 10220 22.3 19.0 117 18.8 19.5 96 DEER PARK 9700 16.5 17.9 92 20.6 25.2 82 LAPRELE CREEK 8375 6.9 9.3 74 14.5 15.0 97 RENO HILL 8400 14.5 16.0 91 19.6 18.4 107 ROACH 9700 16.4 18.5 89 21.9 21.1 104 SAND LAKE 10050 31.4 35.9 87 32.5 27.5 118 SOUTH PASS 9040 13.7 17.9 77 18.0 21.2 85 WINDY PEAK 7900 7.9 7.1 111 12.8 12.4 103 ----- ----- Basin wide percent of average 89 98 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 4.5 7.2 63 15.8 17.7 89 DIVIDE PEAK 8880 19.7 20.8 95 25.6 23.1 111 OLD BATTLE 10000 35.8 35.6 101 38.7 38.1 102 SANDSTONE RS 8150 10.0 12.4 81 18.2 20.7 88 WHISKEY PARK 8950 23.9 30.6 78 32.2 32.0 101 ----- ----- Basin wide percent of average 88 99 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.5 15.0 57 10.6 15.0 71 BLIND BULL SUM 8650 17.1 28.7 60 12.9 24.3 53 EAST RIM DIVIDE 7930 3.0 14.0 21 7.7 13.3 58 ELKHART PARK G.S. 9400 7.6 13.9 55 10.0 15.0 67 GROS VENTRE SUMMIT 8750 7.3 14.4 51 9.0 14.5 62 GUNSIGHT PASS 9820 8.0 -M * 11.0 -M * KENDALL R.S. 7740 2.9 12.6 23 9.0 15.9 57 LOOMIS PARK 8240 5.9 16.3 36 11.3 19.1 59 NEW FORK LAKE 8340 3.4 10.6 32 7.4 12.6 59 POCKET CREEK 9360 7.5 -M * 12.0 -M * SNIDER BASIN 8060 7.9 14.5 54 11.6 17.9 65 SPRING CREEK DIVIDE 9000 18.8 28.9 65 18.9 29.1 65 TRIPLE PEAK 8500 14.4 25.7 56 20.5 27.4 75 ----- ----- Basin wide percent of average 50 63 LOWER GREEN RIVER HAMS FORK 7840 4.8 8.7 55 10.6 13.9 76 HEWINTA 9519 6.1 11.6 53 13.0 16.8 77 HICKERSON PARK 9145 5.1 7.7 66 11.7 9.4 124 HOLE-IN-ROCK 9150 3.4 6.6 52 11.2 8.9 126 INDIAN CREEK 9425 17.2 29.6 58 18.0 28.3 64 KELLEY R.S. 8180 9.4 16.4 57 14.9 22.6 66 STEEL CREEK PARK 10200 15.0 17.8 84 16.2 19.1 85 ----- ----- Basin wide percent of average 62 80 UPPER BEAR RIVER BUG LAKE 7950 11.2 20.9 54 16.0 21.4 75 HAYDEN FORK 9212 7.2 15.6 46 18.5 23.9 77 KELLEY R.S. 8180 9.4 16.4 57 14.9 22.6 66 LILY LAKE 9156 9.0 13.6 66 14.7 20.0 74 MONTE CRISTO 8960 16.8 30.2 56 19.9 28.7 69 SALT RIVER SUMMIT 7760 7.9 13.4 59 13.2 20.8 63 TRIAL LAKE 9992 16.1 26.6 61 16.1 28.0 58 ----- ----- Basin wide percent of average 57 69 ----------------------------------------------------------------------------- -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.