Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 245 PM EDT Sun Jul 21 2019 Valid 00Z Mon Jul 22 2019 - 00Z Wed Jul 24 2019 ...Moderate risk for flash flooding across parts of the Northern Mid-Atlantic on Monday... ...Showers and thunderstorms likely along a cold front from the Northeast to the Southern Plains... ...Locally heavy rainfall possible along and east of the Central and Southern Rockies Monday and Tuesday... The dangerous heat wave which enveloped much of the Midwest to the East Coast this weekend should finally break by Monday as a cold front drops southward. Showers and thunderstorms will accompany this boundary from the Northeast to the Southern Plains with heavy to excessive rainfall and severe weather possible. The boundary will be slow moving, especially across parts of the northern Mid-Atlantic, which will increase the threat for flash flooding. WPC highlights parts of this region, from roughly northeast Virginia to New York City, within a moderate risk on Monday. A slight risk extends into Southern New England and back to the Tennessee Valley. More widespread showers and thunderstorms should push into parts of the Southeast and Gulf Coast states by Tuesday. This boundary will usher in a much appreciated cooler airmass with most of the country east of the Rockies feeling near or below normal by Tuesday. Elsewhere, daily and mainly diurnally driven showers and thunderstorms will develop across parts of the Southwest and along and east of the Central and Southern Rockies with locally heavy to excessive rainfall possible. A cold front moving into the Pacific Northwest on Tuesday should bring increased chances for rain across the Northwest and Northern Rockies. Ahead of this, upper level ridging will build across most of the interior West, keeping temperatures above normal for this time of the year. Santorelli Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php