Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 335 AM EDT Mon Jul 29 2019 Valid 12Z Mon Jul 29 2019 - 12Z Wed Jul 31 2019 ...Showers and thunderstorms are expected across portions of the Plains and Midwest early this week... ...Elevated fire danger exists over the Great Basin today... ...Heat and humidity will build across the Eastern U.S.... An expansive area of high pressure that has been bringing pleasant and generally dry weather over much of the eastern U.S. over the last several days will gradually give way to a cold front moving steadily east across the Plains and Midwest. Southwesterly flow ahead of the cold front will transport notably hotter and more humid air up across the Ohio and Tennessee Valleys and along the East Coast. Temperatures will be above normal for the next couple of days and will be well into the 90s for many major metropolitan areas. The cold front meanwhile will as it crosses the Plains and Midwest will be active focus for scattered showers and thunderstorms. This will include areas of the lower Mississippi Valley and Red River Valley of the South where the same front will stall out and allow for moisture to pool along it. Some localized severe weather and concerns for flash flooding are possible in vicinity of the front over the next couple of days. In behind the aforementioned front crossing the central U.S., cool high pressure will be nosing south from Canada and this will bring below normal temperatures across most of the northern Plains and upper Midwest today through midweek. By midweek, there will be a new frontal system developing across the High Plains, and this will gradually allow for warmer air to begin surging back northward in the lee of the Rockies. Over the Four Corners region, monsoonal moisture will keep a chance of afternoon and evening showers and thunderstorms with a focus on the central and southern Rockies. Some locally heavy rainfall and isolated flash flood concerns will be possible. However, areas farther northwest across the Great Basin will see warm and dry conditions which coupled with much lower humidity and gusty winds should result in an elevated fire danger. Adjacent areas across the northern Rockies will see some widely scattered showers and thunderstorms associated with a developing frontal system, but precipitation amounts here will be generally on the light side. Orrison Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php