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: MAY 2 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 4.1 12.3 33 15.1 24.4 62 COTTONWOOD CREEK 7670 15.2 19.8 77 25.8 31.9 81 GRAND TARGHEE 9260 44.0 -M * 33.8 -M * GRANITE CREEK 6770 5.0 12.8 39 14.1 22.4 63 GRASSY LAKE 7265 20.0 33.4 60 29.8 40.9 73 GROS VENTRE SUMMIT 8750 8.3 13.3 62 10.5 15.3 69 GUNSIGHT PASS 9820 10.0 -M * 13.1 -M * LEWIS LAKE DIVIDE 7850 17.7 34.6 51 25.0 41.6 60 PHILLIPS BENCH 8200 18.0 29.4 61 23.6 33.1 71 SALT RIVER SUMMIT 7760 7.4 10.6 70 14.6 21.6 68 SNAKE RIVER STATION 6920 2.1 12.2 17 18.8 25.5 74 SPRING CREEK DIVIDE 9000 20.5 28.6 72 20.8 30.2 69 THUMB DIVIDE 7980 7.1 14.9 48 15.7 22.0 71 TOGWOTEE PASS 9580 20.9 27.9 75 20.6 29.0 71 TWO OCEAN PLATEAU 9240 24.7 31.8 78 20.9 32.1 65 WILLOW CREEK 8380 20.7 30.6 68 32.5 37.7 86 ----- ----- Basin wide percent of average 61 71 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 16.4 25.9 63 15.9 23.5 68 BLACK BEAR 8170 27.5 39.9 69 30.4 45.8 66 CANYON 7870 7.2 11.3 64 13.4 17.7 76 FISHER CREEK 9100 25.1 37.8 66 27.0 41.9 64 MADISON PLATEAU 7750 16.3 24.2 67 23.6 30.4 78 NORTHEAST ENTRANCE 7350 .7 7.1 10 10.4 14.8 70 PARKER PEAK 9400 19.5 24.5 80 15.4 19.5 79 SYLVAN LAKE 8420 12.9 23.8 54 20.7 24.7 84 THUMB DIVIDE 7980 7.1 14.9 48 15.7 22.0 71 TWO OCEAN PLATEAU 9240 24.7 31.8 78 20.9 32.1 65 WHISKEY CREEK 6800 9.2 15.2 61 15.1 24.2 62 WHITE MILL 8700 17.6 26.4 67 18.3 31.2 59 WOLVERINE 7650 1.1 7.2 15 8.7 15.2 57 ----- ----- Basin wide percent of average 64 69 WIND RIVER BURROUGHS CREEK 8750 9.9 13.6 73 -M 19.3 * COLD SPRINGS 9630 6.3 4.8 131 12.8 13.9 92 DEER PARK 9700 17.9 18.6 96 22.8 27.0 84 HOBBS PARK 10100 19.6 18.0 109 20.7 16.9 122 LITTLE WARM 9370 8.1 11.1 73 11.4 16.8 68 SOUTH PASS 9040 15.1 18.0 84 20.2 22.7 89 ST. LAWRENCE ALT 8620 6.1 6.1 100 13.8 12.1 114 TOGWOTEE PASS 9580 20.9 27.9 75 20.6 29.0 71 TOWNSEND CREEK 8700 11.2 9.1 123 18.2 15.5 117 ----- ----- Basin wide percent of average 90 91 BIGHORN BASIN BALD MTN. 9380 15.7 23.6 67 13.0 21.3 61 BEAR TRAP MEADOW 8200 3.9 2.5 156 10.1 10.9 93 BLACKWATER 9780 19.7 28.8 68 18.9 24.7 77 BONE SPRINGS DIV 9350 12.4 18.3 68 12.9 18.3 70 EVENING STAR 9200 19.0 33.3 57 23.9 29.9 80 GRAVE SPRINGS 8550 9.1 11.1 82 13.0 13.1 99 KIRWIN 9550 10.6 13.0 82 12.3 14.2 87 MARQUETTE 8760 7.7 11.3 68 11.7 13.7 85 MIDDLE POWDER 7760 11.4 14.3 80 11.0 15.8 70 OWL CREEK 8975 .7 4.0 18 7.4 8.2 90 POWDER RIVER PASS 9480 7.7 10.7 72 13.0 15.8 82 SHELL CREEK 9580 13.8 16.8 82 13.4 16.8 80 SYLVAN LAKE 8420 12.9 23.8 54 20.7 24.7 84 SYLVAN ROAD 7120 .9 8.1 11 14.8 20.5 72 TIMBER CREEK 7950 1.4 4.8 29 8.3 10.5 79 YOUNTS PEAK 8350 10.9 18.1 60 11.5 18.8 61 ----- ----- Basin wide percent of average 65 78 SHOSHONE RIVER BLACKWATER 9780 19.7 28.8 68 18.9 24.7 77 EVENING STAR 9200 19.0 33.3 57 23.9 29.9 80 KIRWIN 9550 10.6 13.0 82 12.3 14.2 87 MARQUETTE 8760 7.7 11.3 68 11.7 13.7 85 SYLVAN LAKE 8420 12.9 23.8 54 20.7 24.7 84 SYLVAN ROAD 7120 .9 8.1 11 14.8 20.5 72 YOUNTS PEAK 8350 10.9 18.1 60 11.5 18.8 61 ----- ----- Basin wide percent of average 60 78 POWDER-TONGUE BEAR TRAP MEADOW 8200 3.9 2.5 156 10.1 10.9 93 BIG GOOSE 7990 8.7 11.6 75 12.7 12.9 98 BONE SPRINGS DIV 9350 12.4 18.3 68 12.9 18.3 70 BURGESS JUNCTION 7880 11.7 13.3 88 13.4 15.4 87 CLOUD PEAK RESERVOIR 9860 14.0 16.2 86 14.3 17.1 84 DOME LAKE 8880 8.9 13.5 66 14.3 16.8 85 GRAVE SPRINGS 8550 9.1 11.1 82 13.0 13.1 99 HANSEN SAWMILL 8360 2.7 4.9 55 9.2 11.0 84 MIDDLE POWDER 7760 11.4 14.3 80 11.0 15.8 70 POWDER RIVER PASS 9480 7.7 10.7 72 13.0 15.8 82 SUCKER CREEK 8880 13.0 13.1 99 16.9 17.4 97 TIE CREEK 6870 1.1 3.9 28 12.5 13.5 93 ----- ----- Basin wide percent of average 78 86 BELLE FOURCHE BLIND PARK 6890 1.2 4.0 30 14.7 14.2 104 COLE CANYON 5910 1.1 5.0 22 12.3 9.5 129 NORTH RAPID CREEK 6130 .3 3.8 8 13.3 11.4 117 ----- ----- Basin wide percent of average 20 115 UPPER N. PLATTE RIVER COLUMBINE 9160 18.0 20.9 86 26.4 29.2 90 DIVIDE PEAK 8880 20.8 19.3 108 27.6 24.3 114 ELK RIVER 8700 14.8 15.0 99 23.7 23.0 103 JOE WRIGHT 10120 22.8 25.1 91 26.9 30.1 89 NORTH FRENCH CREEK 10130 40.4 34.5 117 40.2 29.7 135 OLD BATTLE 10000 38.9 36.9 105 41.5 39.9 104 SAGE CREEK BASIN 7850 10.1 11.2 90 15.1 14.1 107 SOUTH BRUSH CREEK 8440 12.7 11.1 114 23.0 20.1 114 TOWER 10500 40.3 52.2 77 37.8 45.1 84 WEBBER SPRINGS 9250 23.0 25.1 92 32.4 31.1 104 WILLOW CREEK PASS 9540 12.3 14.2 87 15.2 15.7 97 ----- ----- Basin wide percent of average 96 102 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 23.9 28.2 85 26.4 27.0 98 CASPER MTN. 7900 15.6 17.1 91 18.0 19.5 92 DEADMAN HILL 10220 27.3 19.7 139 23.8 21.0 113 DEER PARK 9700 17.9 18.6 96 22.8 27.0 84 LAPRELE CREEK 8375 7.6 7.1 107 16.4 16.5 99 RENO HILL 8400 17.6 14.7 120 23.0 20.2 114 ROACH 9700 20.3 18.5 110 25.9 22.4 116 SAND LAKE 10050 36.3 37.0 98 36.6 29.3 125 SOUTH PASS 9040 15.1 18.0 84 20.2 22.7 89 WINDY PEAK 7900 8.6 4.9 176 15.4 13.5 114 ----- ----- Basin wide percent of average 103 104 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 2.9 4.6 63 17.8 18.6 96 DIVIDE PEAK 8880 20.8 19.3 108 27.6 24.3 114 OLD BATTLE 10000 38.9 36.9 105 41.5 39.9 104 SANDSTONE RS 8150 8.9 9.5 94 20.4 21.9 93 WHISKEY PARK 8950 26.4 30.5 87 35.4 33.8 105 ----- ----- Basin wide percent of average 97 103 UPPER GREEN RIVER BIG SANDY OPENING 9080 8.3 13.5 61 11.4 15.9 72 BLIND BULL SUM 8650 19.5 27.9 70 14.7 25.2 58 EAST RIM DIVIDE 7930 1.0 13.2 8 8.5 13.9 61 ELKHART PARK G.S. 9400 7.5 12.8 59 10.5 16.0 66 GROS VENTRE SUMMIT 8750 8.3 13.3 62 10.5 15.3 69 GUNSIGHT PASS 9820 10.0 -M * 13.1 -M * KENDALL R.S. 7740 .2 10.0 2 9.7 16.6 58 LOOMIS PARK 8240 5.0 14.3 35 12.3 19.9 62 NEW FORK LAKE 8340 2.1 8.4 25 7.4 13.4 55 POCKET CREEK 9360 7.6 -M * 13.2 -M * SNIDER BASIN 8060 6.9 12.6 55 12.9 18.5 70 SPRING CREEK DIVIDE 9000 20.5 28.6 72 20.8 30.2 69 TRIPLE PEAK 8500 15.3 23.7 65 23.3 28.6 81 ----- ----- Basin wide percent of average 53 67 LOWER GREEN RIVER HAMS FORK 7840 2.1 6.0 35 11.5 14.7 78 HEWINTA 9519 7.3 9.3 78 15.4 17.8 87 HICKERSON PARK 9145 5.9 5.7 104 13.3 10.2 130 HOLE-IN-ROCK 9150 3.3 4.7 70 12.5 9.7 129 INDIAN CREEK 9425 19.0 28.3 67 19.5 29.5 66 KELLEY R.S. 8180 9.0 14.1 64 16.0 23.6 68 STEEL CREEK PARK 10200 18.2 18.7 97 19.3 20.2 96 ----- ----- Basin wide percent of average 75 86 UPPER BEAR RIVER BUG LAKE 7950 11.3 18.0 63 16.9 22.4 75 HAYDEN FORK 9212 8.0 13.0 62 21.4 25.1 85 KELLEY R.S. 8180 9.0 14.1 64 16.0 23.6 68 LILY LAKE 9156 10.8 11.1 97 17.6 21.1 83 MONTE CRISTO 8960 16.6 28.3 59 21.3 30.3 70 SALT RIVER SUMMIT 7760 7.4 10.6 70 14.6 21.6 68 TRIAL LAKE 9992 19.8 26.5 75 19.0 29.4 65 ----- ----- Basin wide percent of average 68 73 ----------------------------------------------------------------------------- -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.