Weather thursday June 6 2024 Rain from Atlant to NYC will cause flight delays in the east ... Dry and hot in the west

Scattered showers and thunderstorms expected to move through theeastern U.S. for the next couple of days with locally heavy to excessiverainfall possible over the central Appalachians through tonight...Over the next couple of days, a shift in the weather pattern will continueto push the active weather across the eastern U.S.  This shift in theweather pattern will also sustain a heatwave across the southwestern U.S. High temperatures well up into the 100s this afternoon across the CentralValley of California could soar a couple degrees higher Thursdayafternoon.  The Desert Southwest will likely see temperatures soaring intothe 110s Thursday afternoon, with Las Vegas' high temperaturechallenging/reaching its earliest 112 degrees on record.  Widespread highand low temperature records may be tied or broken through Friday. Excessive Heat Warnings are in effect for California's Central Valley aswell as much of the Desert Southwest including southeastern California,southern Nevada and western/southern Arizona.  Record warm lowtemperatures at night will not offer much chance to cool off either.  Theheat is forecast to expand northward across the Great Basin and into theinterior Pacific Northwest on Friday with highs reaching well up into the90s.  Meanwhile, the heat across southern Texas is forecast to become lessintense over the next couple of days.Much cooler, damp, and windy conditions will gradually spread from thenorthern Plains eastward into the upper Midwest and the Great Lakesthrough the next couple of days behind the cold front trailing south froma deep low pressure system over southern Canada.  The system will pushsteadily eastward, providing a break in the active weather over themid-section of the country while spreading showers and embeddedthunderstorms across the Great Lakes, Ohio and Tennessee Valleys, and downtoward the lower Mississippi Valley through tonight.  The inclementweather will reach into much of the East Coast on Thursday as the coldfront continues its eastward progress.  There appears to be a greaterchance for New England to see some locally heavy rain with embeddedthunderstorms later on Thursday as a warm front lifting northward meetsthe eastward-advancing cold front.  More rounds of showers are expectedfor the interior Northeast on Friday as addition energy rotates across theGreat Lakes toward New England.By later on Friday, a low pressure system will be organizing over thecentral Plains with support from upper-level energy ejecting eastward fromthe central Rockies.  Showers and thunderstorms will begin to develop andexpand ahead of the system over the central Plains by Friday afternoon. Scattered thunderstorms will also develop over the central Rockie