Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 331 AM EDT Sat Sep 07 2024 Valid 12Z Sat Sep 07 2024 - 12Z Mon Sep 09 2024 ...Dangerous heat continues to impact portions of the West this weekend... ...Heavy rain and scattered instances of flash flooding are possible along the Gulf Coast and parts of the Southeast... ...Below average temperatures to settle in across much of the Midwest and East through the beginning of next week... A few more days of record-breaking and dangerous heat are in store for parts of the West as well above average temperatures linger underneath a weakening upper-level high pressure system. Areas most likely to experience major to extreme HeatRisk (levels of heat that affect anyone without effective cooling or adequate hydration) through Sunday include southern California, the Desert Southwest, and the northern Great Basin. These regions are also where Excessive Heat Warnings and Heat Advisories remain in effect. High temperatures in the Southwest are expected to soar into the upper 90s and triple digits, with 110s in the typically hottest desert locations through at least Monday. Highs into the upper 90s are forecast to simmer the northern Great Basin before a gradual cooling trend commences by early next week, with the anomalously warm temperatures forecast to shift eastward into the northern Plains. Residents and visitors are advised to continue following proper heat safety. This includes staying hydrated and avoiding extended periods of time outdoors during the hottest parts of the day. Poor air quality will also remain a concern for parts of the Great Basin as wildfire smoke continues to overspread the region. A stationary front extending from off the Southeast coastline to the northern Gulf of Mexico will continue to provide a focus for numerous showers and thunderstorms over the next few days as its moisture gradient gets reinforced by a separate approaching cold front sinking southward across the Deep South today. Areas of locally heavy rain and scattered flash floods are possible from the coastal Carolinas to the central Gulf Coast, including northern and central Florida. Greater concentration of tropical downpours are anticipated to reorient to southern Texas by Monday as an area of low pressure develops in the Bay of Campeche and ushers elevated atmospheric moisture westward to the western Gulf Coast. Elsewhere, a cold front sweeping across the East Coast today will produce scattered showers and thunderstorms throughout the Northeast. Behind this frontal boundary and underneath potent high pressure, below average and crisp temperatures are expected to overspread much of the Great Lakes, Midwest, and East this weekend. Widespread lows into the 40s will lead to a few chilly mornings, with several daily record lows possible between Missouri and New Jersey on Sunday. Patchy frost cannot be ruled out for some locations. Conversely, southern Florida will remain hot and humid this weekend as high temperatures rise into the low-to-mid 90s, while heat indices approach 110 degrees. Snell Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php