Weather for Lewistown, Montana
Lat: 47.06N, Lon: 109.43W
Wx Zone: MTZ051
CWA Used: TFX
Montana Drought MonitorThe Montana Drought monitor is a subset of the United States Monitor, issued every Thursday morning, based on drought conditions the previous Tuesday. The map below shows the current drought level around the state, and the percent of Montana land area in each drought level compared to the previous week. Read an explanation of the drought intensities and what they mean. |
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Montana Hydrologic Information StatementNote that if drought conditions are not being experienced, or in the case of river flooding or heavy rain, this statement may be used to indicate river flows or flood potential. 000 FGUS75 KTFX 152143 ESFTFX 252143- WATER SUPPLY OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 343 PM MDT WED MAY 15 2013 ...Montana Water Supply Outlook as of May 2013... The Montana Water Supply Forecast is issued by the National Weather Service Office in Great Falls in cooperation and coordination with the National Weather Service Office in Missoula. The outlook for the 2013 summer season projects water supply west of the continental divide to be near to below average with the outlook east of the divide to be below to well below average. These forecasts assume near normal moisture and runoff conditions for May through July and do not account for much below average - 70% or less - or above average - 100% or more - snowmelt or spring rains. Detailed summary of April weather conditions for Montana. www.wrh.noaa.gov/tfx/climate/droughtsum/pdfs/montanawx_2013_04.pdf Streamflow forecasts for rivers and sites west of the Continental Divide provided by the Northwest River Forecast Center /NWRFC/ in Portland, Oregon. www.nwrfc.noaa.gov/water_supply/ws_report.cgi?Type=STATE& Source=Montana&Wyr=2013 Streamflow forecasts for rivers and sites east of the Continental Divide provided by the Missouri Basin River Forecast Center /MBRFC/ in Pleasant Hill, Missouri. www.crh.noaa.gov/Image/mbrfc/water_supply/2013/may/ streamflow_forecast.gif SNOWPACK INFORMATION... Current day snow water equivalent information from the National Operational Hydrologic Remote Sensing Center /NOHRSC/. www.nohrsc.noaa.gov/interactive/html/map_only.php?var=ssm_swe& min_x=-116.29166666667&min_y=43.158333333334&max_x=-103.65833333333& max_y=50.266666666667&bgvar=dem&shdvar=shading&title=0&width=800& height=450&font=0&lbl=m&palette=1&h_o=0&metric=0&snap=1&o9=1&o12=1 &o13=1 Current day percent of normal snow water equivalent by basin. www.wcc.nrcs.usda.gov/gis/images/mt_swepctnormal_update.png PRECIPITATION INFORMATION... April 2013 percent of normal precipitation www.wrcc.dri.edu/wwdt/images/pon1/mo_cl.png Calendar Year 2013 percent of normal precipitation www.wrcc.dri.edu/wwdt/images/pon4/mo_cl.png Water Year 2013 percent of normal precipitation www.wrcc.dri.edu/wwdt/images/pon7/mo_cl.png Preliminary map of percent of normal precipitation for the current month provided by the Western Region Climate Center /WRCC/. www.wrcc.dri.edu/cgi-bin/anomimage.pl?mon1mPpct.gif RESERVOIR INFORMATION... Reservoir storage provided by Natural Resources Conservation Service /NRCS/ including percent of capacity, percent of average and percent of last year. www.wcc.nrcs.usda.gov/cgibin/resv-graph.pl?state=MT SURFACE WATER SUPPLY INDEX... The Surface Water Supply Index /SWSI/ is a measure of available surface water availability for the spring and summer months. The SWSI accounts for mountain snowpack, mountain precipitation, streamflow, reservoir storage and soil moisture. SWSI values are provided by the Natural Resources Conservation Service /NRCS/ with the US Dept of Agriculture. SWSI for May 2013 provided by NRCS. nris.mt.gov/NRCS/swsi/pdf/swsi201304.pdf CLIMATE OUTLOOK... Current climate outlook issued by the Climate Prediction Center /CPC/. www.cpc.ncep.noaa.gov/products/predictions/multi_season/ 13_seasonal_outlooks/color/page2.gif The final Water Supply Outlook for 2013 will be issued by June 15. && |