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 TUESDAY: APRIL 20 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 20.9 14.5 145 28.4 24.4 117 COTTONWOOD CREEK 7600 24.2 22.4 109 29.4 27.4 108 GRANITE CREEK 6770 21.0 16.4 129 24.0 25.9 94 GRASSY LAKE 7265 42.2 36.7 116 42.7 40.7 105 GROS VENTRE SUMMIT 8775 16.5 15.5 108 16.7 17.5 96 LEWIS LAKE DIVIDE 7860 40.0 36.2 111 41.3 41.3 101 PHILLIPS BENCH 8200 36.0 30.5 119 33.8 32.7 104 SALT RIVER SUMMIT 7600 15.2 13.0 118 19.4 18.7 105 SNAKE RIVER STATION 6920 19.5 18.0 109 26.7 28.5 94 SPRING CREEK DIVIDE 9000 31.7 29.5 108 30.2 29.9 101 THUMB DIVIDE 7980 23.2 16.7 139 23.5 22.9 104 TOGWOTEE PASS 9580 -M 27.5 * 30.7 30.9 100 TWO OCEAN PLATEAU 9360 39.2 27.0 145 33.0 33.5 99 WILLOW CREEK 8450 33.3 31.9 105 39.9 35.0 115 ----- ----- Basin wide percent of average 118 103 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 27.2 25.7 106 24.5 20.2 122 BLACK BEAR 7950 46.5 40.2 116 -M 44.7 * CANYON 7940 17.7 12.7 139 20.4 15.7 130 FISHER CREEK 9100 37.2 38.3 98 38.3 40.4 95 MADISON PLATEAU 7750 -M 25.2 * 33.7 28.9 117 NORTHEAST ENTRANCE 7350 10.5 8.1 130 14.7 13.2 112 PARKER PEAK 9400 24.9 23.4 107 -M 17.4 * SYLVAN LAKE 8420 26.9 23.9 113 29.2 21.4 138 THUMB DIVIDE 7980 23.2 16.7 139 23.5 22.9 104 TWO OCEAN PLATEAU 9360 39.2 27.0 145 33.0 33.5 99 WHISKEY CREEK 6800 21.7 17.4 125 25.5 24.0 107 WHITE MILL 8700 28.7 26.0 111 25.9 31.2 84 WOLVERINE 7650 12.5 10.7 116 13.5 14.5 94 ----- ----- Basin wide percent of average 117 107 WIND RIVER BURROUGHS CREEK 8750 17.0 14.6 117 19.2 18.5 104 COLD SPRINGS 9630 9.2 8.2 113 13.5 12.2 110 DEER PARK 9700 17.4 -M * 24.5 -M * HOBBS PARK 10100 19.7 17.0 116 18.2 16.2 113 LITTLE WARM 9620 15.5 12.6 124 17.5 15.4 115 SOUTH PASS 9040 -M 17.9 * 21.5 19.4 111 ST. LAWRENCE ALT 8620 8.1 6.6 123 12.0 11.7 102 TOGWOTEE PASS 9580 -M 27.5 * 30.7 30.9 100 TOWNSEND CREEK 8700 11.5 10.2 112 15.6 14.5 108 ----- ----- Basin wide percent of average 117 107 BIGHORN BASIN BALD MTN. 9375 21.7 22.9 95 20.2 19.7 103 BEAR TRAP MEADOW 7900 1.5 6.1 25 10.9 9.9 111 BLACKWATER 9780 32.3 25.2 129 26.7 19.7 136 BONE SPRINGS DIV 9350 19.2 18.2 106 19.4 17.2 114 EVENING STAR 9200 34.5 29.9 116 35.9 24.9 145 GRAVE SPRINGS 8550 10.5 11.0 95 13.6 11.5 120 KIRWIN 9550 13.7 11.4 122 15.5 12.5 125 MARQUETTE 8760 10.7 8.7 123 11.9 12.1 98 MIDDLE POWDER 7760 16.5 14.0 118 19.7 13.9 143 OWL CREEK 8975 6.8 4.3 156 8.0 7.5 106 POWDER RIVER PASS 9480 12.4 11.4 109 16.7 13.6 123 SHELL CREEK 9580 17.0 16.5 104 16.7 15.0 113 SYLVAN LAKE 8420 26.9 23.9 113 29.2 21.4 138 SYLVAN ROAD 8120 16.0 10.0 162 20.4 17.9 115 TIMBER CREEK 7950 6.0 6.5 91 8.7 9.0 97 YOUNTS PEAK 8350 22.2 18.4 121 20.2 18.4 110 ----- ----- Basin wide percent of average 113 121 SHOSHONE RIVER BLACKWATER 9780 32.3 25.2 129 26.7 19.7 136 EVENING STAR 9200 34.5 29.9 116 35.9 24.9 145 KIRWIN 9550 13.7 11.4 122 15.5 12.5 125 MARQUETTE 8760 10.7 8.7 123 11.9 12.1 98 SYLVAN LAKE 8420 26.9 23.9 113 29.2 21.4 138 SYLVAN ROAD 8120 16.0 10.0 162 20.4 17.9 115 YOUNTS PEAK 8350 22.2 18.4 121 20.2 18.4 110 ----- ----- Basin wide percent of average 123 127 POWDER-TONGUE BEAR TRAP MEADOW 7900 1.5 6.1 25 10.9 9.9 111 BIG GOOSE 7990 9.1 -M * 13.6 -M * BONE SPRINGS DIV 9350 19.2 18.2 106 19.4 17.2 114 BURGESS JUNCTION 7880 11.5 13.1 88 13.5 13.5 100 CLOUD PEAK RESERVOIR 9860 19.4 17.2 114 18.2 15.9 116 DOME LAKE 8880 -M 15.0 * 13.5 15.4 89 GRAVE SPRINGS 8550 10.5 11.0 95 13.6 11.5 120 HANSEN SAWMILL 8760 4.1 7.5 56 10.1 9.5 107 MIDDLE POWDER 7760 16.5 14.0 118 19.7 13.9 143 POWDER RIVER PASS 9480 12.4 11.4 109 16.7 13.6 123 SUCKER CREEK 8880 13.0 13.5 96 16.5 15.4 108 TIE CREEK 6870 -M -M * -M 12.9 * ----- ----- Basin wide percent of average 97 113 BELLE FOURCHE BLIND PARK 6890 5.0 11.0 46 17.2 12.5 137 NORTH RAPID CREEK 6130 5.8 -M * 15.0 -M * WARREN PEAK 6520 11.5 11.0 105 11.6 9.5 123 ----- ----- Basin wide percent of average 75 131 UPPER N. PLATTE RIVER COLUMBINE 9400 18.0 23.7 76 24.2 26.9 90 DIVIDE PEAK 8800 22.0 21.2 105 27.4 25.7 107 ELK RIVER 8700 -M 19.2 * 24.2 21.2 115 JOE WRIGHT 10120 21.5 24.4 89 28.5 28.4 101 NORTH FRENCH CREEK 10100 34.2 28.7 120 32.5 26.4 124 OLD BATTLE 10000 32.8 36.7 90 39.4 33.8 117 SOUTH BRUSH CREEK 8400 10.1 12.4 83 21.2 19.2 111 TOWER 10500 48.3 49.8 97 41.3 40.8 102 WEBBER SPRINGS 9200 20.7 27.9 75 29.2 28.7 102 WILLOW CREEK PASS 9540 12.9 13.5 95 13.4 14.5 93 ----- ----- Basin wide percent of average 93 106 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 15.9 29.0 55 24.5 22.2 111 CASPER MTN. 7900 14.9 18.7 80 19.9 17.2 117 DEADMAN HILL 10220 18.0 18.4 99 19.0 19.5 98 DEER PARK 9700 17.4 -M * 24.5 -M * LAPRELE CREEK 8320 -M 9.0 * 17.4 13.7 127 RENO HILL 8400 17.2 15.0 116 22.9 21.4 108 ROACH 9700 17.9 18.2 98 22.7 24.2 94 SAND LAKE 10080 39.9 36.3 111 32.2 23.2 139 SOUTH PASS 9040 -M 17.9 * 21.5 19.4 111 WINDY PEAK 7840 7.3 9.0 81 15.0 11.4 133 ----- ----- Basin wide percent of average 91 114 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 8.5 9.0 94 19.2 17.4 110 DIVIDE PEAK 8800 22.0 21.2 105 27.4 25.7 107 OLD BATTLE 10000 32.8 36.7 90 39.4 33.8 117 SANDSTONE RS 8150 12.4 13.6 91 22.4 21.4 105 WHISKEY PARK 8950 29.4 30.4 97 32.3 31.9 101 ----- ----- Basin wide percent of average 95 108 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.9 15.0 106 16.2 17.9 91 BLIND BULL SUM 8650 30.4 28.5 107 23.4 26.2 90 EAST RIM DIVIDE 7930 14.1 15.0 95 15.0 16.7 90 ELKHART PARK G.S. 9400 14.7 14.7 100 15.7 17.7 90 GROS VENTRE SUMMIT 8775 16.5 15.5 108 16.7 17.5 96 KENDALL R.S. 7740 14.5 12.5 117 17.5 17.0 103 LOOMIS PARK 8240 -M 16.4 * 21.4 20.7 103 NEW FORK LAKE 8340 12.4 10.4 120 13.0 16.0 82 SNIDER BASIN 8250 17.7 14.9 120 18.9 16.7 114 SPRING CREEK DIVIDE 9000 31.7 29.5 108 30.2 29.9 101 TRIPLE PEAK 8500 27.7 26.4 105 32.0 33.8 95 ----- ----- Basin wide percent of average 108 96 LOWER GREEN RIVER HAMS FORK 7840 11.5 5.8 197 12.5 14.7 86 HEWINTA 9500 10.1 8.0 128 15.5 15.2 102 HICKERSON PARK 9150 3.9 5.5 71 10.5 11.4 93 HOLE-IN-ROCK 9150 6.6 5.0 133 11.0 11.4 98 INDIAN CREEK 9425 32.5 30.0 109 27.0 28.4 96 KELLEY R.S. 8180 16.2 16.9 96 19.9 20.7 97 STEEL CREEK PARK 10100 15.9 18.4 87 18.0 15.0 121 ----- ----- Basin wide percent of average 108 99 UPPER BEAR RIVER BUG LAKE 7950 22.5 18.9 120 21.9 21.7 101 HAYDEN FORK 9400 11.7 9.5 124 22.2 21.7 103 KELLEY R.S. 8180 16.2 16.9 96 19.9 20.7 97 LILY LAKE 9050 11.2 11.6 97 19.0 16.9 113 MONTE CRISTO 8960 27.4 28.4 97 28.2 28.7 98 SALT RIVER SUMMIT 7600 15.2 13.0 118 19.4 18.7 105 TRIAL LAKE 9960 19.9 25.4 79 23.4 26.9 87 ----- ----- Basin wide percent of average 101 100 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. 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 1961-90. 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.