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: MARCH 21 , 1999 ----------------------------------------------------------------------------- BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Average Avg Current Average Avg ----------------------------------------------------------------------------- WYOMING SNAKE RIVER BASE CAMP 7030 23.8 17.1 139 26.7 21.8 122 COTTONWOOD CREEK 7600 24.0 22.6 106 26.4 24.5 108 GRANITE CREEK 6770 21.1 17.7 119 22.6 23.0 98 GRASSY LAKE 7265 41.2 34.2 120 39.7 36.1 110 GROS VENTRE SUMMIT 8775 15.1 14.9 101 14.7 15.6 94 LEWIS LAKE DIVIDE 7860 39.8 33.8 118 39.0 36.7 106 PHILLIPS BENCH 8200 31.6 27.8 114 30.8 29.0 106 SALT RIVER SUMMIT 7600 14.7 13.7 107 17.7 16.5 107 SNAKE RIVER STATION 6920 21.6 18.1 119 25.1 25.3 99 SPRING CREEK DIVIDE 9000 27.8 26.7 104 26.5 26.7 99 THUMB DIVIDE 7980 23.1 16.3 142 21.4 20.4 105 TOGWOTEE PASS 9580 -M 23.7 * 27.6 27.5 100 TWO OCEAN PLATEAU 9360 35.0 25.4 138 -M 30.1 * WILLOW CREEK 8450 33.0 29.1 113 36.5 31.4 116 ----- ----- Basin wide percent of average 118 106 UPPER YELLOWSTONE-MADISON BEARTOOTH LAKE 9275 25.6 22.5 114 23.0 17.1 135 BLACK BEAR 7950 48.5 36.4 133 -M 38.6 * CANYON 7940 17.5 12.3 142 18.4 13.6 135 FISHER CREEK 9100 39.2 34.2 115 -M 34.8 * MADISON PLATEAU 7750 -M 23.4 * -M 25.0 * NORTHEAST ENTRANCE 7350 12.5 8.9 140 14.0 11.3 124 PARKER PEAK 9400 22.7 20.6 110 -M 14.8 * SYLVAN LAKE 8420 24.6 21.1 117 26.2 18.2 144 THUMB DIVIDE 7980 23.1 16.3 142 21.4 20.4 105 TWO OCEAN PLATEAU 9360 35.0 25.4 138 -M 30.1 * WHISKEY CREEK 6800 20.1 16.5 122 23.4 20.7 113 WHITE MILL 8700 27.2 24.1 113 24.3 27.0 90 WOLVERINE 7650 12.7 11.2 113 12.4 12.2 102 ----- ----- Basin wide percent of average 124 116 WIND RIVER BURROUGHS CREEK 8750 16.4 14.5 113 17.7 15.7 113 COLD SPRINGS 9630 8.7 7.9 110 11.0 9.8 112 DEER PARK 9700 15.8 -M * 20.7 -M * HOBBS PARK 10100 16.5 14.1 117 14.7 13.1 112 LITTLE WARM 9620 13.4 10.8 124 14.5 12.4 117 SOUTH PASS 9040 16.8 15.6 108 17.9 15.9 113 ST. LAWRENCE ALT 8620 6.4 7.2 89 9.5 9.4 101 TOGWOTEE PASS 9580 -M 23.7 * 27.6 27.5 100 TOWNSEND CREEK 8700 9.0 9.3 97 11.9 11.5 103 ----- ----- Basin wide percent of average 110 108 BIGHORN BASIN BALD MTN. 9375 19.1 19.4 98 17.8 16.2 110 BEAR TRAP MEADOW 7900 6.4 6.7 96 9.0 7.5 120 BLACKWATER 9780 29.3 21.0 140 24.0 17.1 140 BONE SPRINGS DIV 9350 15.3 15.5 99 15.3 13.9 110 EVENING STAR 9200 32.4 25.6 127 33.3 21.4 156 GRAVE SPRINGS 8550 7.9 8.9 89 10.6 8.8 120 KIRWIN 9550 12.1 9.4 129 13.7 10.0 137 MARQUETTE 8760 8.0 7.6 105 8.9 8.6 103 MIDDLE POWDER 7760 10.3 11.4 90 15.0 10.9 138 OWL CREEK 8975 6.0 4.3 140 6.6 5.7 116 POWDER RIVER PASS 9480 12.0 10.3 117 14.6 10.8 135 SHELL CREEK 9580 15.9 14.2 112 14.7 12.2 120 SYLVAN LAKE 8420 24.6 21.1 117 26.2 18.2 144 SYLVAN ROAD 8120 16.4 12.4 132 18.7 15.3 122 TIMBER CREEK 7950 4.7 5.8 81 6.4 6.3 102 YOUNTS PEAK 8350 20.4 16.5 124 18.2 15.7 116 ----- ----- Basin wide percent of average 115 127 SHOSHONE RIVER BLACKWATER 9780 29.3 21.0 140 24.0 17.1 140 EVENING STAR 9200 32.4 25.6 127 33.3 21.4 156 KIRWIN 9550 12.1 9.4 129 13.7 10.0 137 MARQUETTE 8760 8.0 7.6 105 8.9 8.6 103 SYLVAN LAKE 8420 24.6 21.1 117 26.2 18.2 144 SYLVAN ROAD 8120 16.4 12.4 132 18.7 15.3 122 YOUNTS PEAK 8350 20.4 16.5 124 18.2 15.7 116 ----- ----- Basin wide percent of average 126 135 POWDER-TONGUE BEAR TRAP MEADOW 7900 6.4 6.7 96 9.0 7.5 120 BIG GOOSE 7990 6.2 -M * 9.3 -M * BONE SPRINGS DIV 9350 15.3 15.5 99 15.3 13.9 110 BURGESS JUNCTION 7880 8.3 11.1 75 10.0 10.5 95 CLOUD PEAK RESERVOIR 9860 14.2 13.7 104 12.7 12.2 104 DOME LAKE 8880 -M 13.0 * 10.5 12.2 86 GRAVE SPRINGS 8550 7.9 8.9 89 10.6 8.8 120 HANSEN SAWMILL 8760 5.3 6.7 79 7.9 7.2 110 MIDDLE POWDER 7760 10.3 11.4 90 15.0 10.9 138 POWDER RIVER PASS 9480 12.0 10.3 117 14.6 10.8 135 SUCKER CREEK 8880 9.9 11.4 87 12.4 12.2 102 TIE CREEK 6870 3.6 -M * 8.0 10.0 80 ----- ----- Basin wide percent of average 94 108 BELLE FOURCHE BLIND PARK 6890 7.6 10.5 72 14.8 9.1 163 NORTH RAPID CREEK 6130 5.8 -M * 12.5 -M * WARREN PEAK 6520 10.4 10.5 99 14.0 7.4 189 ----- ----- Basin wide percent of average 86 175 UPPER N. PLATTE RIVER COLUMBINE 9400 20.4 23.9 85 20.9 23.1 90 DIVIDE PEAK 8800 17.5 19.6 89 22.6 21.3 106 ELK RIVER 8700 16.7 19.0 88 20.8 17.9 116 JOE WRIGHT 10120 19.5 20.5 95 25.1 23.3 108 NORTH FRENCH CREEK 10100 27.2 23.9 114 27.1 21.9 124 OLD BATTLE 10000 26.3 29.9 88 33.2 28.2 118 SOUTH BRUSH CREEK 8400 11.4 12.0 95 18.0 15.1 119 TOWER 10500 40.8 42.7 96 36.7 34.0 108 WEBBER SPRINGS 9200 17.7 26.1 68 24.3 23.6 103 WILLOW CREEK PASS 9540 11.1 11.0 101 11.5 11.6 99 ----- ----- Basin wide percent of average 91 109 LOWER N. PLATTE - SWEETWATER - LARAMIE BROOKLYN LAKE 10240 16.4 23.9 69 20.8 18.0 116 CASPER MTN. 7900 10.5 14.9 70 15.5 12.9 120 DEADMAN HILL 10220 15.4 15.6 99 16.6 15.4 108 DEER PARK 9700 15.8 -M * 20.7 -M * LAPRELE CREEK 8320 -M 9.8 * 13.8 10.8 128 RENO HILL 8400 12.7 13.0 98 17.5 17.6 99 ROACH 9700 15.0 16.2 93 18.3 19.8 92 SAND LAKE 10080 31.8 31.0 103 26.4 19.0 139 SOUTH PASS 9040 16.8 15.6 108 17.9 15.9 113 WINDY PEAK 7840 6.3 8.0 79 12.2 8.6 142 ----- ----- Basin wide percent of average 90 115 LITTLE SNAKE RIVER BATTLE MOUNTAIN 7440 11.8 11.0 107 16.2 14.3 113 DIVIDE PEAK 8800 17.5 19.6 89 22.6 21.3 106 OLD BATTLE 10000 26.3 29.9 88 33.2 28.2 118 SANDSTONE RS 8150 11.0 14.1 78 18.9 17.5 108 WHISKEY PARK 8950 24.4 27.3 89 27.6 26.2 105 ----- ----- Basin wide percent of average 89 110 UPPER GREEN RIVER BIG SANDY OPENING 9100 15.8 13.9 114 14.5 15.9 91 BLIND BULL SUM 8650 27.9 28.1 99 21.4 23.3 92 EAST RIM DIVIDE 7930 13.1 13.5 97 13.5 14.8 91 ELKHART PARK G.S. 9400 13.3 13.2 101 13.7 15.6 88 GROS VENTRE SUMMIT 8775 15.1 14.9 101 14.7 15.6 94 KENDALL R.S. 7740 15.2 14.5 105 15.4 15.2 101 LOOMIS PARK 8240 -M 16.9 * 19.3 18.4 105 NEW FORK LAKE 8340 12.1 10.9 111 11.7 14.1 83 SNIDER BASIN 8250 15.8 14.3 110 16.0 14.8 108 SPRING CREEK DIVIDE 9000 27.8 26.7 104 26.5 26.7 99 TRIPLE PEAK 8500 27.2 24.5 111 28.1 30.4 92 ----- ----- Basin wide percent of average 105 95 LOWER GREEN RIVER HAMS FORK 7840 13.5 12.0 112 10.7 13.1 82 HEWINTA 9500 10.6 10.5 101 13.4 12.1 111 HICKERSON PARK 9150 6.4 6.2 103 9.1 8.7 105 HOLE-IN-ROCK 9150 5.8 5.9 98 -M 8.7 * INDIAN CREEK 9425 28.3 27.1 104 23.6 25.1 94 KELLEY R.S. 8180 16.4 16.4 100 17.8 18.3 97 STEEL CREEK PARK 10100 13.7 15.1 91 15.7 11.9 132 ----- ----- Basin wide percent of average 102 101 UPPER BEAR RIVER BUG LAKE 7950 21.0 19.7 107 18.7 18.3 102 HAYDEN FORK 9400 14.6 15.8 92 19.8 17.7 112 KELLEY R.S. 8180 16.4 16.4 100 17.8 18.3 97 LILY LAKE 9050 12.5 12.4 101 17.1 13.7 125 MONTE CRISTO 8960 24.7 27.6 89 24.8 24.0 103 SALT RIVER SUMMIT 7600 14.7 13.7 107 17.7 16.5 107 TRIAL LAKE 9960 20.0 24.2 83 20.8 22.5 92 ----- ----- Basin wide percent of average 95 104 ----------------------------------------------------------------------------- -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.