Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 359 PM EDT Mon Sep 16 2019 Valid 00Z Tue Sep 17 2019 - 00Z Thu Sep 19 2019 ...Heavy rain possible over parts of the Western Gulf Coast... ...Temperatures will be 15 to 20 degrees above average over parts of the Northern Plains... A front extending from the Northern High Plains southwestward into Central California will move eastward to the Upper/Middle Mississippi Valley southwestward into parts of the Central Plains and Central High Plains by Wednesday evening. Rain with daytime embedded thunderstorms will develop over parts of the Pacific Northwest into Northern/Central California on Monday evening with the rain moving into parts of the Northern Intermountain Region by Tuesday morning. By Tuesday afternoon the rain will move into parts of the Northern/Central Rockies that will move into parts of the Northern Plains by Wednesday. A second front will move onshore over the Pacific Northwest by Tuesday evening with the boundary moving inland to the Northern Rockies/ Great Basin into Central California by Wednesday evening. The system will produce rain over parts of the Pacific Northwest Coast on Tuesday morning. The rain will move into Northern California by Tuesday afternoon expanding into parts of the Northern Intermountain Region and Central California by Wednesday. Meanwhile, as upper-level energy moves off the the Northeast the showers and thunderstorms over parts of the Southwest and Southern Rockies will end overnight Monday. The overall weather pattern across the continental U.S. will be more like August instead of mid-September for the beginning of the week. There will be a broad upper level ridge encompassing much of the central and southern U.S., resulting in temperatures on the order of 5 to 20 degrees above average from the High Plains to the Southeast U.S. An upper level trough building in across the Pacific Northwest will usher in more fall-like temperatures from northern California to Washington state. For the Mid-Atlantic and Northeast, temperatures should return to near average levels or slightly below as a Canadian surface high builds in across this region Hurricane Humberto will continue to track well away from the Southeast U.S. as it intensifies, with the main issue being rip currents along the length of the Southeast United States Coast and increased wave action that may lead to some beach erosion. The National Hurricane Center has additional information regarding Humberto. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php