Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Fri Aug 10 2018 Valid 00Z Sat Aug 11 2018 - 00Z Mon Aug 13 2018 ...Heavy rain possible over portions of New England through tonight... ...Heavy rain expect over parts of the southern Plains and Southwest... ...Heat wave continues across the Intermountain West and northern Plains... A front will slowly push across southern New England, Ohio Valley and into the southern Plains through tonight. The northern portion of this front is expected to fire off convection which could produce heavy rainfall. A slight risk of flash flooding is possible--with a marginal risk extending into the Ohio Valley through tomorrow morning. Another quasi-stationary boundary to the south is extending into the Southeast and southern Plains also. This boundary will also be the focal point for showers and thunderstorms. Flash flooding will be a concern especially for areas in central and west Texas along with New Mexico. These two boundaries are expected to stay put through the weekend--making it quite wet from the southern Plains northward into the Mid-Atlantic and Northeast. A marginal risk of flash flooding is possible for the Northeat, Mid-Atlantic, and central Appalachians on Saturday and Sunday. Most of central and west Texas can expect a slight risk of flash flooding through the weekend. An active monsoon pattern is in place across the Southwest as plenty of moisture will be in place to fire off diurnally driven thunderstorms across this region and the Great Basin. Expect most of the coverage in the late afternoon and early evening. The areas prone to flash flooding, such as favorable areas in the terrain and urban regions, will be at risk through the weekend--thus a slight risk is in place over parts of the Southwest. The ongoing heat wave over the Pacific Northwest, Intermountain West and northern Plains is expcted to continue. By tomorrow, parts of the Pacific Northwest under the oppressive heat will have high temperatures dropping into the 80s due to a strong cold front moving through the region. Reinhart Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php