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First Warning Forecast: Hurricane Isaias gradually picks up forward speed

Posted at 8:47 PM, Aug 03, 2020
and last updated 2020-08-04 01:00:41-04

Meteorologist April Loveland's First Warning Forecast

Rain and storms will continue this evening and overnight. Conditions will continue to deteriorate heading into Tuesday morning. Expect widespread rain tomorrow morning to midday, tapering off through the afternoon. Most areas will see 2” to 4” of rainfall, trending higher inland and lower near the coast. Winds will ramp up tomorrow morning to midday (SE turning to SW at 40-60 with gusts to 70+ mph). One of our main concerns is the increased threat of tornadoes. Make sure you have a way to receive weather warnings!

THREATS:

  • Tropical storm force winds (39+ mph): power outages and downed trees, especially along and east of I-95.
  • Flash flooding: especially inland, closer to I-95.
  • Increased threat of tornadoes. Tornadoes can occur well ahead and away from the storm center.
  • Storm Surge: 1 to 3 feet.
  • Dangerous marine conditions: rough surf, high risk for rip currents.
  • River flooding: mid to late week, we could see minor to locally moderate levels.

Expect widespread rain tomorrow morning to midday, tapering off through the afternoon. Most areas will see 2” to 4” of rainfall, trending higher inland and lower near the coast. Winds will ramp up tomorrow morning to midday (SE turning to SW at 40-60 with gusts to 70+ mph).

Isaias will quickly move off to the northeast Tuesday afternoon to evening. Winds will relax and rain will move out through the afternoon.

Unsettled weather will be the story Wednesday through Sunday. Expect highs in the upper 80s to near 90 everyday with the chance for showers and storms during the afternoon.

Tropical Storm Warning remains in effect.

A Tropical Storm Warning is issued when sustained winds 39 to 73 mph or higher associated with a tropical cyclone are expected in 36 hours or less. These winds may be accompanied by storm surge, coastal flooding, and/or river flooding.

  • Peak Wind Forecast: 45-55 mph with gusts to 70 mph
  • Window for Tropical Storm force winds: early Tuesday morning until Tuesday afternoon

Tropical Update:

Hurricane Isaias

Isaias regains hurricane strength and is expected to make landfall tonight.

Isaias is moving toward the north-northeast near 16 mph, and this general motion accompanied by a gradual increase in forward speed is expected through tonight followed by a further increase in the forward speed on Tuesday.

On the forecast track, the center of Isaias will approach the coasts of northeastern South Carolina and southern North Carolina within the hurricane warning area during the next few hours. The center will then move inland across eastern North Carolina early Tuesday morning, move along the coast of the mid-Atlantic states on Tuesday, and continue across the northeastern United States Tuesday night.

Maximum sustained winds have increased to near 75 mph with higher gusts. Some additional strengthening is possible before landfall. After landfall, only gradual weakening is anticipated after Isaias makes landfall in the Carolinas and moves across the U.S. mid-Atlantic region tonight and Tuesday.

Tropical-storm-force winds extend outward up to 125 miles from the center.

We're also keeping an eye on...

An area of low pressure a few hundred miles north of the northern Leeward Islands. Marginal environmental conditions could allow for some slow development of this system during the next several days, with a tropical depression possibly forming later this week. This system is forecast to move NW at about 15 mph over the southwestern Atlantic today and on Tuesday, and then stall several hundred miles SW of Bermuda by the middle to latter part of the week.

* Formation chance through 48 hours: Medium (40%)

* Formation chance through 5 days: Medium (50%)

Meteorologist April Loveland

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Check out the Interactive Radar on WTKR.com: Interactive Radar