FXUS01 KWBC 050811 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Thu Jun 05 2025 Valid 12Z Thu Jun 05 2025 - 12Z Sat Jun 07 2025 ...Heavy showers and severe thunderstorms are expected to redevelop tonight across the central Plains and nearby High Plains where flash flooding is possible... ...Another round of heavy showers and severe thunderstorms is expected to impact the south-central Plains and nearby High Plains Friday night into early Saturday where flash flooding is possible... ...Tropical moisture associated with a coastal low pressure system is forecast to bring some heavy rainfall today near the Carolina coastline and portions of the Florida Panhandle... An upper-level trough that has already brought heavy rain and thunderstorms across many locations of the Southwest into the Four Corners is forecast to weaken today. However, the weakened system is forecast to linger over the Southwest and periodically ejects energy eastward into the south-central U.S. where it will continue to interact with a meandering frontal boundary. Under this weather pattern, the threat of heavy rain and strong thunderstorms will lessen today across the Southwest into the Four Corners as the focus of strong thunderstorms will shift into the south-central U.S. through the next couple of days. Multiple waves of low pressure riding northeastward up along the meandering front will periodically trigger clusters of heavy showers and thunderstorms which will lead to additional concerns for some flash flooding along with severe weather. For today, the greatest threat for severe weather is expected to be over the southern High Plains from eastern New Mexico into portions of Oklahoma and Texas where the Storm Prediction Center has depicted a Slight Risk (level 2/5) of severe thunderstorms. A threat of large hail, damaging winds and potentially a few tornadoes will exist, and especially this afternoon and evening. A lesser threat of heavy rain and strong thunderstorms is forecast to extend northeast across the Ohio/Tennessee Valley and into the Northeast for the second half of today and Friday as the front becomes slow-moving. Also on Friday, the threat of severe weather will extent well off to the east into the Ohio and Tennessee Valleys where a broad Slight Risk of severe thunderstorms is depicted. By Friday night into Saturday morning, another round of potentially severe thunderstorms and heavy rain is forecast for the south-central Plains mainly across Oklahoma where slight risks of excessive rainfall and severe thunderstorms are anticipated. Scattered showers and thunderstorms are also expected farther north across the central Rockies into the nearby High Plains through the next couple of days, as well as across the northern Plains into the upper Midwest later today through Friday morning. Meanwhile, an area of low pressure is developing near the coast of the southeastern U.S. where an upper-level trough continues to interact with a coastal front. The center of this system is forecast to track northeastward just inland from the Carolina coastline through tonight before moving further off the Mid-Atlantic coast Friday night into Saturday morning. Tropical moisture lifting northward near and ahead of the system will bring a threat of heavy rainfall and isolated to scattered areas of flash flooding. A few inches of rainfall is generally expected across the coastal plain before the rain moves out to sea on Friday. Behind the aforementioned frontal zone draping from the southern Plains, Ohio Valley and eventually the Northeast, temperatures will generally be below normal with highs especially over portions of the Plains running as much as 10 to 20 degrees below average for early June. Temperatures will also be below normal over portions of the Southwest and the Southeast U.S. where extensive cloud cover and areas of heavy rain will keep temperatures cooler. Much above average temperatures are forecast for the Northeast U.S. ahead of the front where some high temperatures may reach over 90s today. Very warm to locally hot temperatures are also expected by Friday across the Pacific Northwest and portions of the Great Basin. Kong/Orrison Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$