Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Sat Aug 01 2015 Valid 00Z Sun Aug 02 2015 - 00Z Tue Aug 04 2015 ...More heavy rains possible for northern Florida... ...Showers and thunderstorms developing across the upper Midwest... ...More showers and thunderstorms for the southwestern U.S.... ...Wet weather and cooler temperatures for the Northwest early next week... With a stalled frontal boundary remaining centered from the eastern Carolinas back into the northern Gulf of Mexico, showers and thunderstorms are forecast to persist across the region. Some of these storms may produce heavy to excessive rainfall amounts, particularly along portions of the northern Gulf coast of Florida, where deep tropical moisture pooling along the front is expected to interact with a string of weak disturbances moving along the boundary. Elsewhere along the East Coast, expect dry conditions to prevail across much of the region over the next two days. Across the central U.S., showers and thunderstorms are expected to develop ahead of an area of low pressure moving from the northern Great Plains to the Great Lakes Sunday into early Monday. Some of these storms may be strong to severe and produce locally heavy rains. By Monday, a well-defined cold front dropping south behind the low is expected to drop daytime temperatures to 5-10 degrees below their normal highs across the upper Mississippi valley into the upper Great Lakes region. Further to the south and west, showers and thunderstorms will once again expand during the afternoon evening hours across portions of California, the Great Basin, Southwest, the central and southern Rockies and adjacent high plains. Some of these storms may produce locally heavy amounts, resulting in excessive runoff and flash-flooding. Across the northwestern U.S., the dry period is forecast to continue through the remainder of the weekend. But then by Monday, an approaching cold front may provide some showers while putting an end to the string of well-above normal temperatures. Pereira Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_wbg.php