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 18 , 2002 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 10.0 16.0 62 21.3 23.1 92 COTTONWOOD CREEK 7600 15.6 23.1 68 22.7 30.0 76 GRANITE CREEK 6770 9.4 16.2 58 -M 21.3 * GRASSY LAKE 7265 27.9 36.3 77 37.0 38.8 95 GROS VENTRE SUMMIT 8775 13.2 14.4 92 13.1 14.2 92 LEWIS LAKE DIVIDE 7860 30.1 36.3 83 34.5 39.5 87 PHILLIPS BENCH 8200 23.5 30.4 77 26.5 31.4 84 SALT RIVER SUMMIT 7600 7.7 13.7 56 14.0 20.4 69 SNAKE RIVER STATION 6920 12.6 16.5 76 23.3 24.1 97 SPRING CREEK DIVIDE 9000 22.2 28.5 78 22.0 28.6 77 THUMB DIVIDE 7980 15.4 18.0 86 20.3 20.6 99 TOGWOTEE PASS 9580 22.5 26.9 84 21.8 27.0 81 TWO OCEAN PLATEAU 9360 30.8 30.8 100 27.7 30.2 92 WILLOW CREEK 8450 21.2 31.7 67 33.2 35.3 94 ----- ----- Basin wide percent of average 77 87 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 23.0 25.6 90 21.9 22.7 96 BLACK BEAR 8170 -M 40.7 * -M 42.7 * CANYON 8090 13.0 13.4 97 16.6 17.3 96 FISHER CREEK 9100 36.3 37.1 98 -M 34.2 * MADISON PLATEAU 7750 23.4 25.7 91 28.5 28.2 101 NORTHEAST ENTRANCE 7350 4.9 10.0 49 11.7 13.7 85 PARKER PEAK 9400 22.3 23.6 94 18.4 19.9 92 SYLVAN LAKE 8420 20.8 24.1 86 24.5 25.5 96 THUMB DIVIDE 7980 15.4 18.0 86 20.3 20.6 99 TWO OCEAN PLATEAU 9360 30.8 30.8 100 27.7 30.2 92 WHISKEY CREEK 6800 15.2 17.3 88 22.8 22.8 100 WHITE MILL 8700 -M 26.1 * -M 27.1 * WOLVERINE 7650 3.6 10.3 35 11.6 14.4 81 ----- ----- Basin wide percent of average 88 95 WIND RIVER BURROUGHS CREEK 8750 14.7 14.8 99 16.2 18.3 89 COLD SPRINGS 9630 1.0 6.7 15 7.5 12.7 59 DEER PARK 9700 11.9 17.4 68 16.4 -M * HOBBS PARK 10100 10.5 17.0 62 10.5 15.3 69 LITTLE WARM 9370 9.7 12.2 80 13.9 14.6 95 SOUTH PASS 9040 10.4 17.8 58 11.9 19.9 60 ST. LAWRENCE ALT 8620 .0 7.1 0 6.4 10.6 60 TOGWOTEE PASS 9580 22.5 26.9 84 21.8 27.0 81 TOWNSEND CREEK 8700 2.4 9.7 25 6.8 14.0 49 ----- ----- Basin wide percent of average 64 72 BIGHORN BASIN BALD MTN. 9380 16.6 22.2 75 15.3 19.7 78 BEAR TRAP MEADOW 8200 .3 4.3 7 8.3 10.0 83 BLACKWATER 9780 23.2 27.3 85 20.9 23.2 90 BONE SPRINGS DIV 9350 14.1 17.8 79 14.6 17.7 82 EVENING STAR 9200 26.0 32.2 81 28.6 29.2 98 GRAVE SPRINGS 8550 5.5 10.8 51 8.9 15.6 57 KIRWIN 9550 10.9 12.4 88 12.0 13.2 91 MARQUETTE 8760 6.5 10.7 61 7.4 11.7 63 MIDDLE POWDER 7760 5.7 14.1 40 8.5 14.1 60 OWL CREEK 8975 1.7 5.0 34 5.1 7.4 69 POWDER RIVER PASS 9480 8.2 11.7 70 12.6 14.4 88 SHELL CREEK 9580 14.4 16.2 89 13.6 15.5 88 SYLVAN LAKE 8420 20.8 24.1 86 24.5 25.5 96 SYLVAN ROAD 7120 -M 11.3 * 17.6 21.1 83 TIMBER CREEK 7950 1.5 5.5 27 5.9 9.6 61 YOUNTS PEAK 8350 14.9 18.1 82 16.5 17.7 93 ----- ----- Basin wide percent of average 73 83 SHOSHONE RIVER BLACKWATER 9780 23.2 27.3 85 20.9 23.2 90 EVENING STAR 9200 26.0 32.2 81 28.6 29.2 98 KIRWIN 9550 10.9 12.4 88 12.0 13.2 91 MARQUETTE 8760 6.5 10.7 61 7.4 11.7 63 SYLVAN LAKE 8420 20.8 24.1 86 24.5 25.5 96 SYLVAN ROAD 7120 -M 11.3 * 17.6 21.1 83 YOUNTS PEAK 8350 14.9 18.1 82 16.5 17.7 93 ----- ----- Basin wide percent of average 82 90 POWDER-TONGUE BEAR TRAP MEADOW 8200 .3 4.3 7 8.3 10.0 83 BIG GOOSE 7990 7.7 12.2 63 11.5 12.2 94 BONE SPRINGS DIV 9350 14.1 17.8 79 14.6 17.7 82 BURGESS JUNCTION 7880 8.9 13.2 67 10.8 14.0 77 CLOUD PEAK RESERVOIR 9860 12.9 15.5 83 13.7 16.1 85 DOME LAKE 8880 9.7 13.9 70 13.5 15.4 88 GRAVE SPRINGS 8550 5.5 10.8 51 8.9 15.6 57 HANSEN SAWMILL 8360 2.5 6.0 42 8.8 10.1 87 MIDDLE POWDER 7760 5.7 14.1 40 8.5 14.1 60 POWDER RIVER PASS 9480 8.2 11.7 70 12.6 14.4 88 SUCKER CREEK 8880 10.1 13.4 75 14.5 16.0 91 TIE CREEK 6870 2.2 5.0 44 10.7 11.8 91 ----- ----- Basin wide percent of average 64 81 BELLE FOURCHE BLIND PARK 6890 .7 6.9 10 9.8 12.3 80 COLE CANYON 5910 1.6 5.7 28 6.6 -M * NORTH RAPID CREEK 6130 1.7 7.9 22 7.3 10.2 72 ----- ----- Basin wide percent of average 20 76 UPPER N. PLATTE RIVER COLUMBINE 9400 7.8 24.0 32 18.7 27.4 68 DIVIDE PEAK 8800 11.6 20.6 56 17.7 22.7 78 ELK RIVER 8700 7.1 18.7 38 15.7 21.5 73 JOE WRIGHT 10120 12.1 23.9 51 20.0 27.6 72 NORTH FRENCH CREEK 10100 15.5 33.0 47 20.9 27.4 76 OLD BATTLE 10000 20.8 35.1 59 25.2 37.5 67 SAGE CREEK BASIN 7850 2.5 -M * 12.7 -M * SOUTH BRUSH CREEK 8400 6.2 12.9 48 12.5 18.4 68 TOWER 10500 28.3 50.0 57 28.5 42.1 68 WEBBER SPRINGS 9200 12.2 25.9 47 18.9 29.1 65 WILLOW CREEK PASS 9540 8.4 13.7 61 9.7 14.4 67 ----- ----- Basin wide percent of average 50 70 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 12.5 26.8 47 14.6 24.7 59 CASPER MTN. 7900 5.5 16.9 33 9.7 17.2 56 DEADMAN HILL 10220 10.4 18.6 56 12.1 19.1 63 DEER PARK 9700 11.9 17.4 68 16.4 -M * LAPRELE CREEK 8320 1.9 9.6 20 10.2 14.7 69 RENO HILL 8400 7.3 15.7 46 10.8 17.7 61 ROACH 9700 6.9 18.4 38 12.1 20.7 58 SAND LAKE 10080 21.2 35.4 60 20.7 26.9 77 SOUTH PASS 9040 10.4 17.8 58 11.9 19.9 60 WINDY PEAK 7840 1.0 7.4 14 8.5 12.1 70 ----- ----- Basin wide percent of average 48 64 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 .9 7.9 11 10.5 17.3 61 DIVIDE PEAK 8800 11.6 20.6 56 17.7 22.7 78 OLD BATTLE 10000 20.8 35.1 59 25.2 37.5 67 SANDSTONE RS 8150 2.6 12.7 20 14.1 20.5 69 WHISKEY PARK 8950 18.3 30.7 60 22.2 31.5 70 ----- ----- Basin wide percent of average 51 69 UPPER GREEN RIVER BIG SANDY OPENING 9100 11.3 15.0 75 11.4 14.8 77 BLIND BULL SUM 8650 -M 28.7 * 18.6 23.9 78 EAST RIM DIVIDE 7930 10.5 13.8 76 11.1 13.1 85 ELKHART PARK G.S. 9400 10.3 13.8 75 11.6 14.8 78 GROS VENTRE SUMMIT 8775 13.2 14.4 92 13.1 14.2 92 KENDALL R.S. 7740 6.4 12.9 50 13.6 15.7 87 LOOMIS PARK 8240 14.0 16.6 84 15.7 18.9 83 NEW FORK LAKE 8340 7.3 10.8 68 9.6 12.5 77 SNIDER BASIN 8250 6.4 14.5 44 12.5 17.5 71 SPRING CREEK DIVIDE 9000 22.2 28.5 78 22.0 28.6 77 TRIPLE PEAK 8500 17.9 25.5 70 23.8 26.9 88 ----- ----- Basin wide percent of average 72 81 LOWER GREEN RIVER HAMS FORK 7840 3.1 9.2 34 9.0 13.7 66 HEWINTA 9500 5.2 11.7 44 12.3 16.4 75 HICKERSON PARK 9150 .9 7.8 12 7.9 9.1 87 HOLE-IN-ROCK 9150 1.4 6.8 21 7.3 8.7 84 INDIAN CREEK 9425 20.1 29.4 68 18.6 27.7 67 KELLEY R.S. 8180 10.7 16.6 64 15.8 22.2 71 STEEL CREEK PARK 10100 12.3 17.5 70 12.7 18.4 69 ----- ----- Basin wide percent of average 54 72 UPPER BEAR RIVER BUG LAKE 7950 14.0 21.0 67 16.9 21.0 80 HAYDEN FORK 9400 6.9 15.8 44 17.9 23.3 77 KELLEY R.S. 8180 10.7 16.6 64 15.8 22.2 71 LILY LAKE 9050 6.5 13.9 47 14.4 19.5 74 MONTE CRISTO 8960 19.9 30.2 66 24.0 28.2 85 SALT RIVER SUMMIT 7600 7.7 13.7 56 14.0 20.4 69 TRIAL LAKE 9960 14.0 26.4 53 20.0 27.4 73 ----- ----- Basin wide percent of average 58 76 ----------------------------------------------------------------------------- -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.