tropical update for 8/19/23

Tropics Show More Activity, Higher Probabilities since Yesterday

What a difference a day makes! Yesterday, the Atlantic Basin had four areas of concern. Today, it has five. And, according to the National Hurricane Center (NHC), the chances of tropical development have increased for all of them since yesterday. See the seven-day outlook for the Atlantic Basin below and note the time: Saturday, August 19, 2023 at 3:35 Eastern time.

The NHC diagram below shows a veritable parade of potential storms marching from Africa toward the Americas.

Lowdown on the Lows

Starting with the yellow area moving off the coast of Western Africa:

Yellow Area on Right

A tropical wave located near the western coast of Africa is producing a large area of disorganized showers and thunderstorms. Some slow development is possible while it moves generally west-northwestward across the tropical eastern Atlantic during the next several days. Formation chance through 7 days…still low…20 percent.

Red Area with X

The red cross-hatched area to the left of the yellow is a broad area of low pressure located several hundred miles west of the Cabo Verde Islands. Shower and thunderstorm activity continues. Environmental conditions appear generally favorable for further development. A short-lived tropical depression will likely form this weekend and move west-northwestward at about 10 mph across the eastern tropical Atlantic. By early next week, upper-level winds over the system are forecast to increase, and further development is not expected. Formation chance through 7 days…high…70 percent.

TD #6

Tropical Depression #6 formed in the central, tropical Atlantic this afternoon. The system will move west-northwestward at 10 to 15 mph.  However, upper-level winds will become increasingly unfavorable by late this weekend, so NHC does not anticipate any further development.

Orange Area Entering Caribbean

A broad area of low pressure has formed near the Windward Islands. Shower and thunderstorm activity has become better organized since yesterday. Some additional development of this system is likely and a tropical depression could form by early next week when the system moves into the eastern and central Caribbean Sea. Formation chance through 7 days…medium…60 percent.

Orange Area Entering Gulf

An area of disturbed weather located near the Bahamas will move into the Gulf of Mexico by early next week where a broad area of low pressure will form. Some slow development is possible thereafter. A tropical depression could form as it moves westward and approaches the western Gulf of Mexico coastline by the middle of next week. The storm will likely make landfall in South Texas and bring little rainfall to the Houston area north of I-10. Formation chance through 7 days…medium…50 percent.

Satellite Image Shows Current Conditions in Gulf and Eastern Pacific

The last area represents the most imminent threat to Texas. Here’s what it looks like in a satellite image. Not very impressive at the moment, especially compared to Hurricane Hilary in the Pacific (on the left).

Conditions can change rapidly so prepare and stay aware.

Posted by Bob Rehak on 8/19/23 based on information from the NHC

2181 Days since Hurricane Harvey