Weather Tuesday June 11 2024 Fait in Philadelphia, New York and Boston with scattered pm showers , T-storms gulf coast into central Texas... Dry west coast.

A very stormy and wet week is in store for the Florida Peninsula as asteady plume of rich, tropical moisture from the western Caribbean beginsto overspread the area ahead of a quasi-stationary frontal boundary drapedjust to the north. Multiple rounds of intense downpour producing storms(rain rates of 2"+ per hour) are expected not only through the currentforecast period (Wednesday evening), but are likely to continue into theweekend. Slight Risks (level 2/4) of Excessive Rainfall are in effect bothTuesday and Wednesday for the threat of flash flooding, particularly forurban areas, and a higher threat level may be necessary if confidence inday-to-day storm locations increases. While antecedent conditions are dryin the region, the threat outside urban areas may also increase with eachday as the heavy rainfall begins to lead to wetter soils more susceptibleto flooding.  Further west, additional storms are expected along theboundary along the immediate Gulf Coast and into portions of Texas thenext couple of days. While the available moisture will not be as high andrain rates/totals are not forecast to be as heavy as further east, therewill still be an isolated risk of flash flooding, most likely over centralTexas. The Storm Prediction Center has also included a Slight Risk ofsevere thunderstorms (level 2/5) over the Edwards Plateau Tuesday wheresome of the more intense storms could produce some large hail and damagingwinds.Showers and thunderstorms continue ahead of a frontal system passingthrough the northern/central Plains this evening. The system will liftnortheastward into the Upper Midwest Tuesday with some showers and stormsexpected, though totals will likely remain light to moderate as stormcoverage/intensity decreases. Another system will approach and move intothe Pacific Northwest early Tuesday and pass through the northern Rockiesby Wednesday, though little to no precipitation is expected across theregion. As the system enters the northern Plains/Upper Midwest byWednesday afternoon, better moisture streaming northward will bring agreater chance of thunderstorms. The SPC has included a Slight Risk overportions of the Upper Midwest for the threat of very large hail anddamaging winds.Much of the West will remain well-above average this week as anupper-level high begins to build in over the Southwest and northernMexico. The greatest threat from the heat will stretch from the centralCalifornia valleys into portions of southern Nevada/Arizona Tuesday beforeexpanding even further east into southern New Mexico and far west Texas byWednesday. Here, heat-related advisories and warnings are in place astemperatures soar well into the 100s and nighttime lows in the 70s and low80s provide little relief. The risk from the heat is characterized as'Major' (level 3/4) which considers impacts that will be felt by theentire population that are without effective cooling or adequatehydration, not just those individuals more sensitive to heat. Much aboveaverage temperatures will also spread into portions of the north-centralU.S. by Wednesday, with many highs in the upper 80s to mid-90s from thecentral/northern Plains into portions of the Upper Midwest. Meanwhile,temperatures will begin to warm-up and return closer to normal over thenext couple of days for much of the Interior Northeast/Ohio Valleyfollowing many highs in the 60s Monday. Most of the eastern/southern U.S.will be near average with highs in the 70s/80s for the Northeast, 80s inthe Mid-Atlantic, and 80s and 90s from the Southern Plains into theSoutheast.