Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 354 AM EDT Sun Aug 29 2021 Valid 12Z Sun Aug 29 2021 - 12Z Tue Aug 31 2021 ...Hurricane Ida is forecast to intensify rapidly to major hurricane strength before making landfall on the Louisiana coast on Sunday... ...There is a High Risk of excessive rainfall and a Slight Risk of severe weather for tornado potential over parts of the Central Gulf Coast through Monday morning... ...There is a Slight Risk of severe thunderstorms over the Upper Great Lakes through Monday morning... ...Dangerous heat over parts of Southern California and the Southwest... Hurricane IDA is forecast to intensify rapidly to a major hurricane before making landfall on the Louisiana Coast on Sunday. Squalls and heavy downpours associated with the outer rain bands of Ida impact Louisiana, along with the increasingly strong and gusty wind. Torrential rain driven by destructive hurricane-force wind will damage the Louisiana coast as the eye of the hurricane makes landfall on Sunday. All actions about protecting lives and properties should be rushed to completion. Amongst other hazards, there will be a High Risk of excessive rainfall through Monday morning. Check with the NHCâ€s latest bulletin for the most up-to-date track and intensity of IDA. The heavy wind-driven rain has led the WPC to issue a High Risk of excessive rainfall over the Central Gulf Coast through Monday morning. Severe, widespread flash flooding is expected with IDA. Areas that normally do not experience flash flooding will flood. Lives and property are in great danger. Additionally, the SPC has issued a Slight Risk of severe weather for tornado potential associated with IDA. IDA will slowly start to weaken after landfall while moving northward into the Tennessee Valley by Tuesday. The excessive rainfall threat will be Moderate over parts of the Lower Mississippi and Tennessee Valleys through Tuesday evening into Wednesday. The severe weather threat will continue for tornado potential associated with IDA through Tuesday morning. Meanwhile, a front over the Upper Great Lakes into the Central Rockies will move eastward, moving off the Northeast Coast and extending across the Ohio/Middle Mississippi Valleys into the Northern High Plains by Tuesday. Showers and thunderstorms will develop along and ahead of the boundary from the Great Lakes into the Northeast by Monday. As a result, the SPC has issued a Slight Risk of severe thunderstorms over parts of the Upper Great Lakes through Monday morning. The hazards associated with these thunderstorms are frequent lightning, severe thunderstorm wind gusts, hail, and a few tornadoes. The severe thunderstorm threat will weaken slightly over the Northeast on Monday into Tuesday morning. Showers and thunderstorms will continue along and near the front from parts of the Northern/Central Plains into the Ohio/Middle Mississippi Valley on Monday into Tuesday. As a result, there will be a Slight Risk of excessive rainfall over parts of the Middle Missouri Valley on Monday into Tuesday. Elsewhere, upper-level impulses and diurnal heating will produce showers and thunderstorms over parts of the Southwest into the Southern Plains from the late afternoon into the late evening on Sunday and Monday. Additionally, heat will also produce hazards. Therefore, Excessive Heat Warnings are in effect over Southern California into parts of the Southwest through Monday. Ziegenfelder Graphics available at www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php