Weather Underground Forecast for Tuesday, July 02, 2013.
Expect little change in the nation¼'s weather on Tuesday as a fairly stagnant weather pattern remains overhead. This pattern will support continued heat in the West and another round of showers and storms in the East.
Out West, another extremely hot day is expected across the western states as an expansive ridge of high pressure remains dominant over the Great Basin. Temperatures in parts of California, the Desert Southwest, and the Great Basin are expected to reach well past the century mark, while highs ranging from the upper 90s to the lower 100s were possible from parts of the Pacific Northwest interior through areas of western Montana. Excessive Heat Warnings will persist from western Arizona through most of California and Nevada, as outside activities remain dangerous for the region. Heat Advisories are also expected for areas of northwestern Nevada through parts of Washington, northern Idaho, and northwestern Montana. Hot and dry conditions coupled with dry thunderstorm potential in parts of Arizona and Nevada will keep fire danger high through the day. Meanwhile, chances of scattered storms will continue for parts of the Central and Southern Rockies.
In the East, hot and humid weather conditions will continue for the eastern third of the nation as the region remains in between an upper trough of low pressure over the Eastern Valleys and a ridge of high pressure in the western Atlantic Ocean. Ample warm, moist flow will stream in from the south-southwest and pool along a cold front stalling from the Northeast through the Ohio Valley, leading to more showers and storms through the day. Additional showers and storms are anticipated in the Mid-Atlantic and southeastern corner of the nation as disturbances extend through the Southeast.
Temperatures in the Lower 48 states Monday have ranged from a morning low of 37 degrees at Leadville, Colo. to a high of 109 degrees at Needles, Calif.