243 FXUS01 KWBC 010707 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 305 AM EDT Fri May 01 2026 Valid 12Z Fri May 01 2026 - 12Z Sun May 03 2026 ...Heavy rain expected to continue in Texas and the Lower Mississippi Valley today, before migrating eastward.... ...A developing coastal low will bring rain chances to the Southeast and Northeast over the weekend... ...Much-below-average temperatures are forecast for much of the eastern and southern U.S. through the weekend... A stationary frontal boundary will continue to bring heavy rainfall for Texas and portions of the Lower Mississippi Valley today. A potent and slow-moving upper-level trough will continue feeding in upper-level energy to the region, and a prolonged influx of moisture will continue flowing onshore from the warmer Gulf. This will continue to support heavy showers and thunderstorms as the stationary front supports continuous rounds. The stubborn precipitation along with antecedent rainfall from previous days will result in scattered instances of flash flooding. As such, a Slight Risk of Excessive Rainfall (level 2/4) remains in the outlook today for Texas and portions of the Lower Mississippi Valley. Precipitation will finally subside in the region late on Friday evening/overnight Saturday morning, as the front begins to move into the Gulf, aided by a building surface ridge. To start the weekend, the aforementioned front will bring showers and thunderstorms to the Southeast and Florida, as a coastal low begins to materialize. The heaviest precipitation and strongest thunderstorms are expected in northern Florida, as a combination of a robust low-level jet, inflow of comparatively warm and moist air from the Gulf, and the presence of the cold front as a lifting mechanism, develops. Thunderstorms in the region will have the potential to be severe, bring a risk of damaging winds, and isolated hail. As a result, there is a Slight Risk of severe thunderstorms for Saturday, per the Storm Prediction Centers Convective Outlook. As these frontal systems continue their way through their respective regions, significantly below-average temperatures will linger through the weekend for much of the eastern and southern regions of the U.S. Temperatures in the Southern Plains and Southern Rockies could drop around 30 degrees below the seasonal average. Texas and parts of the Lower Mississippi Valley may potentially set record-low daily maximum temperatures, with widespread temperatures in the 50s expected. Much-below-average temperatures are also expected in the Southeast, Mid-Atlantic, Northeast, and Midwest regions. Freeze warnings and Frost advisories are currently in effect for parts of the Great Lakes. Further west, above-average temperatures will spread through the Pacific Northwest, Northern and Central Great Basin, and California, before moving eastward. Temperatures in the Pacific Northwest could be especially high, with temperatures in the mid-80s and even approaching 90 expected. Blanco-Alcala Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$