Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 328 PM EDT Sun Sep 08 2024 Valid 00Z Mon Sep 09 2024 - 00Z Wed Sep 11 2024 ...There is a Slight Risk of excessive rainfall over parts of the Western Gulf Coast on Monday, expanding into the Central Gulf Coast by Tuesday... ...Dangerous heat continues to impact portions of southern California and the Southwest through Monday... ...There are Excessive Heat Warnings and Heat Advisories over parts of Southern California and the Southwest... A quasi-stationary front will linger along the Gulf Coast through Tuesday. Tropical moisture pooling along the boundary will also create showers and thunderstorms through Tuesday. On Monday, the showers and thunderstorms will produce heavy rain over parts of the southern Texas Coast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Western Gulf Coast from Monday into Tuesday morning. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas the most vulnerable. Moreover, on Tuesday, the showers and thunderstorms with heavy rain will expand along the Western Gulf Coast into the Central Gulf Coast. Therefore, the WPC has issued a Slight Risk (level 2/4) of excessive rainfall over parts of the Western and Central Gulf Coast on Tuesday. The associated heavy rain will create mainly localized areas of flash flooding, with urban areas, roads, small streams, and low-lying areas the most vulnerable. Meanwhile, weak monsoonal moisture will aid in producing showers and thunderstorms over parts of the Great Basin and Central/Southern Rockies from the late afternoon into the late evening on Sunday and Monday. In addition, weak upper-level energy over the Northern Intermountain Region will produce scattered showers and thunderstorms overnight Sunday and over parts of the Northern Plains/Upper Mississippi Valley overnight Monday into Tuesday. Additionally, upper-level ridging over the parts of Southern California and the Southwest Plains will allow high temperatures to be in the upper 90s and low 100s, prompting Excessive Heat Warnings and Advisories over parts of the region. Additionally, with low temperatures in the lower 80s and upper 70s, little relief from the heat will occur overnight. Therefore, people spending more time outdoors or in a building without cooling in areas with heat warnings are still at an increased risk of heat-related illness. Ziegenfelder Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php