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 MONDAY: APRIL 12 , 2010 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 9.5 17.5 54 12.8 22.6 57 COTTONWOOD CREEK 7670 16.0 24.2 66 21.3 29.2 73 GRAND TARGHEE 9260 38.3 -M * 28.7 -M * GRANITE CREEK 6770 9.9 17.7 56 12.2 20.8 59 GRASSY LAKE 7265 -M 37.1 * -M 37.9 * GROS VENTRE SUMMIT 8750 8.7 14.6 60 8.7 13.8 63 GUNSIGHT PASS 9820 9.2 -M * 10.6 -M * LEWIS LAKE DIVIDE 7850 18.9 36.7 51 21.1 38.8 54 PHILLIPS BENCH 8200 18.7 30.4 62 20.1 30.7 65 SALT RIVER SUMMIT 7760 10.8 14.7 73 12.6 19.9 63 SNAKE RIVER STATION 6920 7.3 18.3 40 16.3 23.6 69 SPRING CREEK DIVIDE 9000 18.6 28.2 66 17.8 28.0 64 THUMB DIVIDE 7980 10.5 19.1 55 13.1 20.1 65 TOGWOTEE PASS 9580 19.4 26.3 74 19.2 26.3 73 TWO OCEAN PLATEAU 9240 21.5 30.0 72 17.6 29.4 60 WILLOW CREEK 8380 22.4 31.6 71 26.6 34.2 78 ----- ----- Basin wide percent of average 62 65 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9360 14.1 25.1 56 13.2 21.4 62 BLACK BEAR 8170 26.4 40.7 65 25.6 42.7 60 CANYON 7870 8.8 14.1 62 10.9 16.3 67 FISHER CREEK 9100 23.9 36.7 65 22.8 38.5 59 MADISON PLATEAU 7750 16.3 26.1 62 19.8 28.4 70 NORTHEAST ENTRANCE 7350 5.8 11.0 53 8.8 13.4 66 PARKER PEAK 9400 19.2 23.1 83 13.2 17.4 76 SYLVAN LAKE 8420 14.1 23.9 59 17.0 22.3 76 THUMB DIVIDE 7980 10.5 19.1 55 13.1 20.1 65 TWO OCEAN PLATEAU 9240 21.5 30.0 72 17.6 29.4 60 WHISKEY CREEK 6800 10.2 17.8 57 12.6 22.3 57 WHITE MILL 8700 16.5 25.6 64 15.6 28.6 55 WOLVERINE 7650 7.4 11.5 64 7.3 13.6 54 ----- ----- Basin wide percent of average 64 63 WIND RIVER BURROUGHS CREEK 8750 8.7 15.2 57 6.9 17.3 40 COLD SPRINGS 9630 7.9 8.0 99 9.8 11.7 84 DEER PARK 9700 17.9 17.1 105 19.7 23.5 84 HOBBS PARK 10100 17.5 16.4 107 17.1 14.1 121 LITTLE WARM 9370 8.1 12.5 65 8.9 14.4 62 SOUTH PASS 9040 16.0 17.6 91 17.5 19.8 88 ST. LAWRENCE ALT 8620 9.6 7.4 130 11.1 9.8 113 TOGWOTEE PASS 9580 19.4 26.3 74 19.2 26.3 73 TOWNSEND CREEK 8700 13.3 9.6 139 15.8 12.9 122 ----- ----- Basin wide percent of average 91 84 BIGHORN BASIN BALD MTN. 9380 14.0 21.3 66 11.5 18.7 61 BEAR TRAP MEADOW 8200 8.2 5.0 164 9.0 9.1 99 BLACKWATER 9780 17.5 26.3 67 16.1 22.1 73 BONE SPRINGS DIV 9350 12.1 17.3 70 10.5 15.8 66 EVENING STAR 9200 20.0 31.6 63 20.9 27.0 77 GRAVE SPRINGS 8550 9.9 10.4 95 11.0 10.9 101 KIRWIN 9550 9.7 12.1 80 9.3 12.1 77 MARQUETTE 8760 7.8 10.0 78 8.8 10.9 81 MIDDLE POWDER 7760 11.6 13.4 87 9.4 13.4 70 OWL CREEK 8975 6.5 5.6 116 5.5 6.6 83 POWDER RIVER PASS 9480 9.5 11.7 81 11.4 13.4 85 SHELL CREEK 9580 11.9 15.8 75 10.7 14.4 74 SYLVAN LAKE 8420 14.1 23.9 59 17.0 22.3 76 SYLVAN ROAD 7120 6.5 12.8 51 11.9 18.7 64 TIMBER CREEK 7950 4.6 5.8 79 6.4 8.2 78 YOUNTS PEAK 8350 10.6 18.0 59 9.1 17.2 53 ----- ----- Basin wide percent of average 72 74 SHOSHONE RIVER BLACKWATER 9780 17.5 26.3 67 16.1 22.1 73 EVENING STAR 9200 20.0 31.6 63 20.9 27.0 77 KIRWIN 9550 9.7 12.1 80 9.3 12.1 77 MARQUETTE 8760 7.8 10.0 78 8.8 10.9 81 SYLVAN LAKE 8420 14.1 23.9 59 17.0 22.3 76 SYLVAN ROAD 7120 6.5 12.8 51 11.9 18.7 64 YOUNTS PEAK 8350 10.6 18.0 59 9.1 17.2 53 ----- ----- Basin wide percent of average 64 71 POWDER-TONGUE BEAR TRAP MEADOW 8200 8.2 5.0 164 9.0 9.1 99 BIG GOOSE 7990 9.5 12.0 79 10.8 9.9 109 BONE SPRINGS DIV 9350 12.1 17.3 70 10.5 15.8 66 BURGESS JUNCTION 7880 11.0 12.8 86 10.7 13.2 81 CLOUD PEAK RESERVOIR 9860 12.9 14.8 87 11.6 14.1 82 DOME LAKE 8880 9.4 13.6 69 11.7 14.3 82 GRAVE SPRINGS 8550 9.9 10.4 95 11.0 10.9 101 HANSEN SAWMILL 8360 6.7 6.4 105 7.8 9.0 87 MIDDLE POWDER 7760 11.6 13.4 87 9.4 13.4 70 POWDER RIVER PASS 9480 9.5 11.7 81 11.4 13.4 85 SUCKER CREEK 8880 12.7 13.1 97 13.4 14.7 91 TIE CREEK 6870 3.7 5.6 66 10.1 10.9 93 ----- ----- Basin wide percent of average 86 86 BELLE FOURCHE BLIND PARK 6890 6.1 8.0 76 12.2 11.9 103 COLE CANYON 5910 6.5 7.2 90 10.2 7.3 140 NORTH RAPID CREEK 6130 7.7 8.9 87 11.1 9.2 121 ----- ----- Basin wide percent of average 84 118 UPPER N. PLATTE RIVER COLUMBINE 9160 21.4 25.0 86 23.2 26.7 87 DIVIDE PEAK 8880 23.9 20.7 115 25.3 22.0 115 ELK RIVER 8700 20.2 20.0 101 21.1 20.8 101 JOE WRIGHT 10120 19.7 23.0 86 22.2 26.5 84 NORTH FRENCH CREEK 10130 38.1 31.8 120 35.6 26.3 135 OLD BATTLE 10000 35.9 34.1 105 38.0 36.5 104 SAGE CREEK BASIN 7850 17.9 12.0 149 13.9 12.7 109 SOUTH BRUSH CREEK 8440 14.6 13.4 109 19.3 17.6 110 TOWER 10500 38.0 48.6 78 34.7 40.8 85 WEBBER SPRINGS 9250 25.9 26.3 98 29.4 28.3 104 WILLOW CREEK PASS 9540 9.3 13.2 70 11.6 13.8 84 ----- ----- Basin wide percent of average 99 101 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 22.3 25.8 86 23.2 23.7 98 CASPER MTN. 7900 18.2 16.2 112 16.8 16.0 105 DEADMAN HILL 10220 21.5 17.8 121 18.3 18.2 101 DEER PARK 9700 17.9 17.1 105 19.7 23.5 84 LAPRELE CREEK 8375 11.3 10.7 106 14.6 13.8 106 RENO HILL 8400 18.0 15.6 115 19.6 16.6 118 ROACH 9700 18.5 18.2 102 21.7 19.9 109 SAND LAKE 10050 32.7 34.4 95 32.0 25.9 124 SOUTH PASS 9040 16.0 17.6 91 17.5 19.8 88 WINDY PEAK 7900 10.3 8.3 124 12.6 11.4 111 ----- ----- Basin wide percent of average 103 104 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.7 9.5 123 15.5 16.8 92 DIVIDE PEAK 8880 23.9 20.7 115 25.3 22.0 115 OLD BATTLE 10000 35.9 34.1 105 38.0 36.5 104 SANDSTONE RS 8150 15.0 14.0 107 18.0 19.8 91 WHISKEY PARK 8950 28.3 30.7 92 31.5 30.4 104 ----- ----- Basin wide percent of average 105 102 UPPER GREEN RIVER BIG SANDY OPENING 9080 10.2 15.3 67 10.0 14.2 70 BLIND BULL SUM 8650 16.3 28.9 56 12.3 23.5 52 EAST RIM DIVIDE 7930 6.7 13.8 49 7.4 12.7 58 ELKHART PARK G.S. 9400 9.1 14.0 65 9.5 14.2 67 GROS VENTRE SUMMIT 8750 8.7 14.6 60 8.7 13.8 63 GUNSIGHT PASS 9820 9.2 -M * 10.6 -M * KENDALL R.S. 7740 6.2 14.0 44 8.4 15.3 55 LOOMIS PARK 8240 8.7 17.4 50 10.8 18.4 59 NEW FORK LAKE 8340 6.4 11.5 56 7.0 12.0 58 POCKET CREEK 9360 8.6 -M * 11.5 -M * SNIDER BASIN 8060 9.8 15.0 65 11.0 17.1 64 SPRING CREEK DIVIDE 9000 18.6 28.2 66 17.8 28.0 64 TRIPLE PEAK 8500 17.9 25.9 69 19.3 26.3 73 ----- ----- Basin wide percent of average 60 63 LOWER GREEN RIVER HAMS FORK 7840 9.1 10.7 85 9.9 13.0 76 HEWINTA 9519 11.3 12.5 90 12.6 15.8 80 HICKERSON PARK 9145 9.2 8.4 110 11.4 8.6 133 HOLE-IN-ROCK 9150 8.3 7.5 111 10.5 8.2 128 INDIAN CREEK 9425 19.3 29.4 66 17.1 27.1 63 KELLEY R.S. 8180 11.7 17.4 67 13.9 21.6 64 STEEL CREEK PARK 10200 14.7 16.9 87 15.6 17.8 88 ----- ----- Basin wide percent of average 81 81 UPPER BEAR RIVER BUG LAKE 7950 11.3 21.8 52 14.9 20.4 73 HAYDEN FORK 9212 13.7 16.8 82 18.0 22.5 80 KELLEY R.S. 8180 11.7 17.4 67 13.9 21.6 64 LILY LAKE 9156 12.7 14.6 87 14.2 18.9 75 MONTE CRISTO 8960 20.3 30.6 66 19.4 27.2 71 SALT RIVER SUMMIT 7760 10.8 14.7 73 12.6 19.9 63 TRIAL LAKE 9992 17.7 26.2 68 15.5 26.6 58 ----- ----- Basin wide percent of average 69 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.