Occasional Showers/Storms Through The Weekend

| August 20, 2021 @ 3:37 pm

RADAR CHECK: The heaviest rain across Alabama this afternoon is over the southern quarter of the state, otherwise we have scattered showers and thunderstorms in various pockets that are moving to the southeast. Temperatures are mostly in the 80s, but where rain is falling we are seeing many places in the 70s; the average high for Birmingham on August 20 is 91.

Showers and storms will remain possible across Alabama tonight, but they will fade during the late night hours as the air becomes more stable.

THE ALABAMA WEEKEND: The sky will be occasionally cloudy tomorrow with scattered to numerous showers and thunderstorms. Some high resolution models suggest an MCS (mesoscale convective system) will roll through the state, especially the western counties, with potential for strong winds. SPC has introduced a “marginal risk” (level 1/5) for parts of Central and West Alabama tomorrow due to the potential.

The sky will feature more clouds than sun tomorrow with a high in the mid 80s. Then, on Sunday, look for a partly sunny sky with the usual summer round of “scattered, mostly afternoon and evening showers and thunderstorms”. Sunday’s high will be in the 87-90 degree range. Odds of any one spot getting wet are 65-75 percent tomorrow, and 34-45 percent Sunday.

NEXT WEEK: An upper ridge will build over the Deep South Monday and Tuesday; the sky will be mostly sunny both days with only isolated showers. Heat levels rise with highs in the low to mid 90s. Then, Wednesday through Friday, we expect pretty routine August weather with partly sunny days, and showers and storms around in scattered spots during the afternoon and evening hours. Highs over the latter half of the week will be close to 90 degrees. See the Weather Xtreme video for maps, graphics, and more details.

GRACE: Grace is a hurricane again in the Bay of Campeche, and landfall will come this evening on the coast of Mexico well south of Brownsville, Texas at category two strength.

HENRI: In the Atlantic, Tropical Storm Henri now packs winds of 70 mph, and is located about 320 miles south/southeast of Cape Hatteras. The latest NHC forecast has the system moving into the southern New England coast Sunday as an upper end tropical storm, or a category one hurricane. A Hurricane Watch is in effect for…

* South Shore of Long Island from Fire Island Inlet to Montauk
* North Shore of Long Island from Port Jefferson Harbor to Montauk
* New Haven Connecticut to Sagamore Beach Massachusetts
* Nantucket, Martha’s Vineyard, and Block Island

Dangerous storm surge inundation and hurricane conditions are possible beginning Sunday in portions of Long Island, Connecticut, Rhode Island, and southeastern Massachusetts, where a Storm Surge Watch and Hurricane Watch are in effect.

Also, a tropical wave located over the eastern Atlantic several hundred miles to the southwest of the Cabo Verde Islands is producing a broad area of disorganized showers and thunderstorms. This wave is expected to interact with another wave emerging off the African coast over the next day or two. Afterwards, environmental conditions appear marginally favorable for some slow development by the beginning of next week as this system moves gradually to the northwest at 5 to 10 mph. For now the chance of development is only 20 percent over the next five days.

ON THIS DATE IN 1928: A tornado estimated at F4 intensity initially touched down in Winnebago County, Iowa, moved to Freeborn County, Minnesota, and hit the south side of Austin, MN. Five of the six deaths were in Austin with 60 injuries.

BEACH FORECAST: Click here to see the AlabamaWx Beach Forecast Center page.

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Look for my next Weather Xtreme video here by 6:00 a.m. Monday… enjoy the weekend!

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Category: Alabama's Weather, ALL POSTS, Weather Xtreme Videos

About the Author ()

James Spann is one of the most recognized and trusted television meteorologists in the industry. He holds the AMS CCM designation and television seals from the AMS and NWA. He is a past winner of the Broadcast Meteorologist of the Year from both professional organizations.

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