####018003362#### FXUS01 KWBC 052013 PMDSPD Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 PM EDT Wed Jun 05 2024 Valid 00Z Thu Jun 06 2024 - 00Z Sat Jun 08 2024 ...Excessive Heat Warnings in effect across the California's Central Valley and much of the Desert Southwest... ...Heat gradually becomes less intense over southern Texas... ...Scattered showers and thunderstorms expected to move through the eastern U.S. for the next couple of days with locally heavy to excessive rainfall possible over the central Appalachians through tonight... Over the next couple of days, a shift in the weather pattern will continue to push the active weather across the eastern U.S. This shift in the weather pattern will also sustain a heatwave across the southwestern U.S. High temperatures well up into the 100s this afternoon across the Central Valley of California could soar a couple degrees higher Thursday afternoon. The Desert Southwest will likely see temperatures soaring into the 110s Thursday afternoon, with Las Vegas' high temperature challenging/reaching its earliest 112 degrees on record. Widespread high and low temperature records may be tied or broken through Friday. Excessive Heat Warnings are in effect for California's Central Valley as well as much of the Desert Southwest including southeastern California, southern Nevada and western/southern Arizona. Record warm low temperatures at night will not offer much chance to cool off either. The heat is forecast to expand northward across the Great Basin and into the interior Pacific Northwest on Friday with highs reaching well up into the 90s. Meanwhile, the heat across southern Texas is forecast to become less intense over the next couple of days. Much cooler, damp, and windy conditions will gradually spread from the northern Plains eastward into the upper Midwest and the Great Lakes through the next couple of days behind the cold front trailing south from a deep low pressure system over southern Canada. The system will push steadily eastward, providing a break in the active weather over the mid-section of the country while spreading showers and embedded thunderstorms across the Great Lakes, Ohio and Tennessee Valleys, and down toward the lower Mississippi Valley through tonight. The inclement weather will reach into much of the East Coast on Thursday as the cold front continues its eastward progress. There appears to be a greater chance for New England to see some locally heavy rain with embedded thunderstorms later on Thursday as a warm front lifting northward meets the eastward-advancing cold front. More rounds of showers are expected for the interior Northeast on Friday as addition energy rotates across the Great Lakes toward New England. By later on Friday, a low pressure system will be organizing over the central Plains with support from upper-level energy ejecting eastward from the central Rockies. Showers and thunderstorms will begin to develop and expand ahead of the system over the central Plains by Friday afternoon. Scattered thunderstorms will also develop over the central Rockies. Kong Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php $$