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 FRIDAY: APRIL 9 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.9 17.8 56 12.6 22.3 57 COTTONWOOD CREEK 7670 16.6 24.4 68 21.3 28.8 74 GRAND TARGHEE 9260 38.1 -M * 28.6 -M * GRANITE CREEK 6770 10.0 18.1 55 12.3 20.6 60 GRASSY LAKE 7265 -M 37.0 * -M 37.5 * GROS VENTRE SUMMIT 8750 8.8 14.6 60 8.6 13.5 64 GUNSIGHT PASS 9820 9.4 -M * 10.5 -M * LEWIS LAKE DIVIDE 7850 19.0 36.5 52 21.1 38.3 55 PHILLIPS BENCH 8200 18.8 30.1 62 20.0 30.3 66 SALT RIVER SUMMIT 7760 11.0 14.9 74 12.5 19.7 63 SNAKE RIVER STATION 6920 7.8 18.7 42 16.3 23.3 70 SPRING CREEK DIVIDE 9000 18.5 27.8 67 17.7 27.6 64 THUMB DIVIDE 7980 10.6 19.3 55 13.1 19.8 66 TOGWOTEE PASS 9580 19.3 26.0 74 19.2 25.8 74 TWO OCEAN PLATEAU 9240 21.4 29.6 72 17.5 29.0 60 WILLOW CREEK 8380 22.6 31.4 72 26.6 33.7 79 ----- ----- Basin wide percent of average 63 66 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 14.1 24.5 58 13.2 21.0 63 BLACK BEAR 8170 26.3 40.5 65 25.5 42.1 61 CANYON 7870 9.0 14.0 64 10.8 16.1 67 FISHER CREEK 9100 23.8 36.3 66 22.6 38.0 59 MADISON PLATEAU 7750 16.3 26.0 63 19.7 28.0 70 NORTHEAST ENTRANCE 7350 5.7 11.1 51 8.8 13.2 67 PARKER PEAK 9400 18.9 22.7 83 12.9 17.1 75 SYLVAN LAKE 8420 14.1 23.5 60 17.0 21.9 78 THUMB DIVIDE 7980 10.6 19.3 55 13.1 19.8 66 TWO OCEAN PLATEAU 9240 21.4 29.6 72 17.5 29.0 60 WHISKEY CREEK 6800 10.3 17.7 58 12.6 22.0 57 WHITE MILL 8700 16.5 25.3 65 15.5 28.2 55 WOLVERINE 7650 7.4 11.6 64 7.3 13.4 54 ----- ----- Basin wide percent of average 64 63 WIND RIVER BURROUGHS CREEK 8750 8.7 15.0 58 7.0 17.0 41 COLD SPRINGS 9630 8.1 8.4 96 9.8 11.3 87 DEER PARK 9700 17.9 17.4 103 19.7 23.1 85 HOBBS PARK 10100 17.7 15.9 111 16.9 13.7 123 LITTLE WARM 9370 8.3 12.3 67 8.9 14.1 63 SOUTH PASS 9040 16.2 17.3 94 17.5 19.4 90 ST. LAWRENCE ALT 8620 9.9 7.5 132 11.1 9.5 117 TOGWOTEE PASS 9580 19.3 26.0 74 19.2 25.8 74 TOWNSEND CREEK 8700 13.6 9.5 143 15.7 12.5 126 ----- ----- Basin wide percent of average 93 86 BIGHORN BASIN BALD MTN. 9380 14.0 20.8 67 11.3 18.3 62 BEAR TRAP MEADOW 8200 8.2 5.2 158 8.9 8.8 101 BLACKWATER 9780 17.4 25.7 68 16.0 21.6 74 BONE SPRINGS DIV 9350 12.2 17.1 71 10.4 15.5 67 EVENING STAR 9200 19.8 31.1 64 20.7 26.5 78 GRAVE SPRINGS 8550 10.2 10.2 100 11.0 10.5 105 KIRWIN 9550 9.5 11.9 80 9.3 11.9 78 MARQUETTE 8760 8.0 9.8 82 8.7 10.6 82 MIDDLE POWDER 7760 11.7 12.9 91 9.2 13.1 70 OWL CREEK 8975 6.7 5.7 118 5.5 6.4 86 POWDER RIVER PASS 9480 9.6 11.5 83 11.2 13.1 85 SHELL CREEK 9580 11.8 15.5 76 10.6 14.1 75 SYLVAN LAKE 8420 14.1 23.5 60 17.0 21.9 78 SYLVAN ROAD 7120 6.9 12.7 54 12.0 18.4 65 TIMBER CREEK 7950 4.7 5.8 81 6.4 7.9 81 YOUNTS PEAK 8350 10.6 17.7 60 9.1 16.9 54 ----- ----- Basin wide percent of average 74 75 SHOSHONE RIVER BLACKWATER 9780 17.4 25.7 68 16.0 21.6 74 EVENING STAR 9200 19.8 31.1 64 20.7 26.5 78 KIRWIN 9550 9.5 11.9 80 9.3 11.9 78 MARQUETTE 8760 8.0 9.8 82 8.7 10.6 82 SYLVAN LAKE 8420 14.1 23.5 60 17.0 21.9 78 SYLVAN ROAD 7120 6.9 12.7 54 12.0 18.4 65 YOUNTS PEAK 8350 10.6 17.7 60 9.1 16.9 54 ----- ----- Basin wide percent of average 65 73 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.2 5.2 158 8.9 8.8 101 BIG GOOSE 7990 9.4 11.7 80 10.7 9.5 113 BONE SPRINGS DIV 9350 12.2 17.1 71 10.4 15.5 67 BURGESS JUNCTION 7880 11.1 12.4 90 10.6 12.9 82 CLOUD PEAK RESERVOIR 9860 12.9 14.4 90 11.3 13.7 82 DOME LAKE 8880 9.4 13.2 71 11.6 14.0 83 GRAVE SPRINGS 8550 10.2 10.2 100 11.0 10.5 105 HANSEN SAWMILL 8360 6.5 6.5 100 7.4 8.7 85 MIDDLE POWDER 7760 11.7 12.9 91 9.2 13.1 70 POWDER RIVER PASS 9480 9.6 11.5 83 11.2 13.1 85 SUCKER CREEK 8880 12.8 12.7 101 13.4 14.4 93 TIE CREEK 6870 3.8 6.1 62 10.1 10.6 95 ----- ----- Basin wide percent of average 88 87 BELLE FOURCHE BLIND PARK 6890 6.7 8.1 83 12.2 11.7 104 COLE CANYON 5910 6.7 7.1 94 10.2 7.1 144 NORTH RAPID CREEK 6130 8.4 8.8 95 11.0 9.0 122 ----- ----- Basin wide percent of average 91 120 UPPER N. PLATTE RIVER COLUMBINE 9160 21.9 25.1 87 23.1 26.3 88 DIVIDE PEAK 8880 24.9 20.6 121 25.3 21.6 117 ELK RIVER 8700 20.8 20.1 103 21.1 20.5 103 JOE WRIGHT 10120 19.9 22.6 88 22.2 26.0 85 NORTH FRENCH CREEK 10130 37.9 31.1 122 34.3 25.8 133 OLD BATTLE 10000 35.6 33.6 106 37.8 36.0 105 SAGE CREEK BASIN 7850 18.5 11.9 155 13.9 12.5 111 SOUTH BRUSH CREEK 8440 15.4 13.4 115 19.2 17.3 111 TOWER 10500 -M 47.8 * -M 40.1 * WEBBER SPRINGS 9250 26.3 26.4 100 29.3 27.9 105 WILLOW CREEK PASS 9540 9.2 12.9 71 11.5 13.5 85 ----- ----- Basin wide percent of average 106 105 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.3 25.2 88 23.2 23.3 100 CASPER MTN. 7900 18.1 15.7 115 16.7 15.5 108 DEADMAN HILL 10220 21.3 17.4 122 18.3 17.8 103 DEER PARK 9700 17.9 17.4 103 19.7 23.1 85 LAPRELE CREEK 8375 11.8 10.9 108 14.5 13.4 108 RENO HILL 8400 18.3 15.2 120 19.5 16.1 121 ROACH 9700 18.9 18.0 105 21.7 19.5 111 SAND LAKE 10050 32.9 33.9 97 31.9 25.4 126 SOUTH PASS 9040 16.2 17.3 94 17.5 19.4 90 WINDY PEAK 7900 10.7 8.4 127 12.6 11.2 113 ----- ----- Basin wide percent of average 105 106 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 12.5 10.0 125 15.5 16.6 93 DIVIDE PEAK 8880 24.9 20.6 121 25.3 21.6 117 OLD BATTLE 10000 35.6 33.6 106 37.8 36.0 105 SANDSTONE RS 8150 15.8 14.3 110 18.1 19.5 93 WHISKEY PARK 8950 30.2 30.7 98 31.5 29.9 105 ----- ----- Basin wide percent of average 109 104 UPPER GREEN RIVER BIG SANDY OPENING 9080 9.8 15.2 64 9.9 14.0 71 BLIND BULL SUM 8650 16.2 28.8 56 12.2 23.2 53 EAST RIM DIVIDE 7930 6.7 13.7 49 7.3 12.6 58 ELKHART PARK G.S. 9400 9.0 13.9 65 9.4 14.0 67 GROS VENTRE SUMMIT 8750 8.8 14.6 60 8.6 13.5 64 GUNSIGHT PASS 9820 9.4 -M * 10.5 -M * KENDALL R.S. 7740 6.2 14.3 43 8.4 15.1 56 LOOMIS PARK 8240 8.8 17.5 50 10.7 18.1 59 NEW FORK LAKE 8340 6.5 11.5 57 6.8 11.9 57 POCKET CREEK 9360 8.7 -M * 11.5 -M * SNIDER BASIN 8060 10.0 15.0 67 11.0 16.9 65 SPRING CREEK DIVIDE 9000 18.5 27.8 67 17.7 27.6 64 TRIPLE PEAK 8500 18.0 25.7 70 19.3 25.9 75 ----- ----- Basin wide percent of average 60 63 LOWER GREEN RIVER HAMS FORK 7840 9.2 11.1 83 9.8 12.8 77 HEWINTA 9519 11.3 12.5 90 12.5 15.4 81 HICKERSON PARK 9145 9.1 8.3 110 11.3 8.4 135 HOLE-IN-ROCK 9150 8.4 7.5 112 10.4 8.0 130 INDIAN CREEK 9425 19.6 29.1 67 17.0 26.7 64 KELLEY R.S. 8180 11.6 17.4 67 13.8 21.3 65 STEEL CREEK PARK 10200 13.9 16.6 84 15.7 17.3 91 ----- ----- Basin wide percent of average 81 82 UPPER BEAR RIVER BUG LAKE 7950 11.0 21.7 51 14.8 20.1 74 HAYDEN FORK 9212 14.0 16.9 83 17.9 22.1 81 KELLEY R.S. 8180 11.6 17.4 67 13.8 21.3 65 LILY LAKE 9156 12.9 14.5 89 14.2 18.5 77 MONTE CRISTO 8960 20.8 30.5 68 19.3 26.8 72 SALT RIVER SUMMIT 7760 11.0 14.9 74 12.5 19.7 63 TRIAL LAKE 9992 17.7 26.0 68 15.4 26.2 59 ----- ----- Basin wide percent of average 70 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.