First Warning Forecast: Rain, storms, and a flash flooding threat

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Posted at 4:23 AM, Aug 20, 2021
and last updated 2021-08-20 11:12:42-04

Meteorologist Myles Henderson’s First Warning Forecast

*** Flash Flood Watch is in effect from 6 AM to 10 PM Friday for all of the Southside, Peninsula, Middle Peninsula, and parts of NE NC.

Flash flooding threat… Expect mostly cloudy skies today with several rounds of showers and storms moving through. Rain will be heavy at times and could trigger localized flash flooding. Temperatures will struggle to reach the mid 80s today, but it will still be muggy.

Clouds, showers, and storms will stick around for Saturday as a front lingers over the Mid-Atlantic and Henri tracks just off the East Coast. Henri will bring us rough surf and a high risk for rip currents over the next several days.

Sunday will be the better pick of the weekend. We will see a nice mix of sun and clouds with lower rain chances. A scattered shower or storm could still pop up in the afternoon to evening. Highs will warm to near 90 on Sunday. Highs will linger in the low 90s for most of next week and several days will see a heat index near 100.

Today: Mostly Cloudy, Rain & Storms. Highs in the mid 80s. Winds: W/N/E 5-10

Tonight: Mostly Cloudy, Rain & Storms. Lows in the low 70s. Winds: S 5-10

Tomorrow: Mostly Cloudy, Rain & Storms. Highs in the mid 80s. Winds: N 5-10

Weather & Health

Pollen: Low-Medium (Ragweed, Grasses)

UV Index: 9 (Very High)

Air Quality: Good (Code Green)

Mosquitoes: Extreme

Tropical Update
Grace expected to continue strengthening. On the forecast track, the center of Grace is forecast to move across the southwestern Gulf of Mexico this afternoon, and then make landfall along the coast of mainland Mexico this evening or tonight.
Data from an Air Force Reserve Hurricane Hunter aircraft indicate that maximum sustained winds are near 85 mph with higher gusts. Strengthening is forecast until Grace makes landfall, with rapid weakening expected as Grace moves inland over the mountains of central Mexico.

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Tropical Storm Henri expected to become a hurricane by Saturday. Henri is centered about 345 miles SSE of Cape Hatteras, NC. A turn toward the north is expected by tonight, and Henri is forecast to accelerate in that direction through early Sunday. On the forecast track, Henri is expected to make landfall in southern New England by late Sunday.
Maximum sustained winds are near 65 mph with higher gusts. Strengthening is forecast during the next couple of days, and Henri is expected to become a hurricane by Saturday and be at or near hurricane strength when it makes landfall in southern New England. Tropical-storm-force winds extend outward up to 90 miles from the center.

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