Weather for Lewistown, Montana
Lat: 47.06N, Lon: 109.43W
Wx Zone: MTZ051 CWA Used: TFX
Montana Drought Monitor
The 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.
Montana Hydrologic Information Statement
Note 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 112012 ESFTFX 122012- WATER SUPPLY OUTLOOK NATIONAL WEATHER SERVICE GREAT FALLS MT 212 PM MDT TUE JUN 11 2013 ...Montana Water Supply Outlook as of June 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 June 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 May weather conditions for Montana http://www.wrh.noaa.gov/tfx/climate/droughtsum/pdfs/montanawx_2013_05.pdf Streamflow forecasts for rivers and sites west of the Continental Divide provided by the Northwest River Forecast Center - NWRFC - in Portland, Oregon http://www.nwrfc.noaa.gov/water_supply/ws_report.cgi?Type=STATE&Source=Montana&W yr=2013 http://www.crh.noaa.gov/Image/mbrfc/water_supply/2013/apr/tn_streamflow_forecast _jumbo.gif Streamflow forecasts for rivers and sites east of the Continental Divide provided by the Missouri Basin River Forecast Center - MBRFC - in Pleasant Hill, Missouri http://www.nwrfc.noaa.gov/ws/?zoom=8¢er=47.57652571374621,-114.7576904296875 &map_type=esp_poa&overlay_basins=0&overlay_hsa=0&overlay_counties=0 SNOWPACK INFORMATION... Current day snow water equivalent information from the National Operational Hydrologic Remote Sensing Center - NOHRSC http://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. http://www.wcc.nrcs.usda.gov/gis/images/mt_swepctnormal_update.png PRECIPITATION INFORMATION... May 2013 percent of normal precipitation http://www.wrcc.dri.edu/wwdt/images/pon1/mo_cl.png Calendar Year 2013 percent of normal precipitation http://www.wrcc.dri.edu/wwdt/images/pon5/mo_cl.png Water Year 2013 percent of normal precipitation http://www.wrcc.dri.edu/wwdt/images/pon8/mo_cl.png Preliminary map of percent of normal precipitation for the current month provided by the Western Region Climate Center http://www.wrcc.dri.edu/cgi-bin/anomimage.pl?mon1mPpct.gif RESERVOIR INFORMATION... Reservoir storage provided by NRCS - percent of capacity, percent of average and percent of last year http://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 June 2013 provided by NRCS http://nris.mt.gov/NRCS/swsi/pdf/swsi201306.pdf CLIMATE OUTLOOK... Current climate outlook issued by the Climate Prediction Center - CPC http://www.cpc.ncep.noaa.gov/products/predictions/multi_season/13_seasonal_outlo oks/color/page2.gif This is the final Water Supply Outlook for 2013. Outlooks for 2014 will begin in January. WEATHER.GOV/GREATFALLS &