A wrapped-up storm system in the Mississippi Valley will continue its trek to the northeast today, bringing a variety of weather hazards to the Midwest, Tennessee Valley, and Southeast.
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Southerly flow out of the Gulf of Mexico has transported warm and saturated air northward to the Great Lakes region, and scattered showers with some storms will continue through the morning hours.
This afternoon, daytime heating will promote more expansive showers and thunderstorms, some of which may be severe along the I-75 corridor from Ohio southward to Georgia.
In addition, heavy rain falling over areas that have received appreciable rainfall recently may lead to areas of flash flooding.
Areas under the highest threat will be around the Mobile, AL area into the Florida panhandle.
By Friday, the storm will continue to move through the Midwest into the Northeast, carrying its cold front across the central/southern Appalachians.
Showers and thunderstorms will again expand in coverage during the afternoon hours with a focus over the Mid-Atlantic region for both severe weather and flash flooding.
In the West, a cold front will move into coastal Washington and Oregon late tonight.
Ahead of the system, mild temperatures and overspreading moisture will contribute to showers and thunderstorms over eastern Oregon into central Idaho, some of which may be severe.
The Storm Prediction Center has indicated a Slight Risk of storms with the main threat of damaging wind and hail.
Temperatures over much of the West will be well above normal today, except for along the immediate coast.
By Friday, the front in the Northwest will being in cooler air to Washington and Oregon eastward to northern Idaho, as the core of the heat moves into the central Rockies and the western portion of the High Plains.
Some areas may approach record highs.
South of this frontal system, warm temperatures, low relative humidity values, and breezy winds will support a fire weather risk over much of Nevada where some dry thunderstorms may also be possible. ■
A clipper system will move quickly across the northern Plains into the Midwest Friday and the Northeast by Saturday, bringing a wintry mix of rain and snow showers ahead of a sweeping cold front.