Saturday, August 7, 2021

RTW TRACKING THE TROPICSL UPDATE AUG 7, 2021...10:26PM EDT

 

NATIONAL HURRICANE CENTER TROPICAL OUTLOOK

000
ABNT20 KNHC 072315
TWOAT 

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Sat Aug 7 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

Showers and thunderstorms associated with a broad area of low 
pressure located about a hundred miles southwest of the 
southwesternmost Cabo Verde Islands have been decreasing during the 
past several hours.  Strong upper-level winds and cooler waters are 
expected to prevent significant development of this system while it 
moves toward the west or west-northwest at about 10 mph during the 
next few days.  Regardless of development, locally heavy rainfall 
and gusty winds still are possible over portions of the westernmost 
Cabo Verde Islands through Sunday.
* Formation chance through 48 hours...low...20 percent. 
* Formation chance through 5 days...low...20 percent.

A small but well-defined area of low pressure located over the 
tropical Atlantic about a thousand miles west of the Cabo Verde 
Islands continues to produce limited shower activity.  
Environmental conditions are expected to become a little more 
favorable for gradual development over the next several days, and 
this system could become a tropical depression by the middle of next 
week.  The system is forecast to drift toward the west-southwest or 
west during the next couple of days, and then move a little faster 
toward the west-northwest by mid-week. 
* Formation chance through 48 hours...low...20 percent. 
* Formation chance through 5 days...medium...40 percent.

A surface trough of low pressure is producing disorganized showers 
and thunderstorms over the central tropical Atlantic several 
hundred miles east of the Windward Islands.  Some gradual 
development of this system is possible while it moves 
west-northwestward at 10 to 15 mph, reaching portions of the Lesser 
Antilles late Monday and then moving across the eastern Caribbean 
Sea and Greater Antilles through the middle of next week.
* Formation chance through 48 hours...low...10 percent.
* Formation chance through 5 days...low...20 percent.

$$
Forecaster Berg





 






RTW TRACKING THE TROPICS UPDATE AUG 7, 2021

 

INVESTIGATION 92L HAS TAKEN A TRACK NORTH FOR NOW INTO AN AREA WITH NO DRY AIR.  THIS IS TEMPORARY AND A TRACK BACK TO THE WEST-NORTHWEST IS EXPECTED.  HOWEVER, ENVIRONMENTAL CONDITIONS AHEAD OF 92L ARE NOT FAVORABLE AND IT LOOKS LIKE THIS SYSTEM WILL BE SHORT LIVED.

NEW 93L HAS A BETTER CHANCE IF IT TRACKS SOUTH OF THE DRY AIR TO THE NORTH AND STAYS ON A TRACK INTO THE CARIBBEAN.  IT DOES NOT SEEM THAT IS WHAT WILL HAPPEN AS MODELS TRACK THIS SYSTEM NORTH IN TIME.  HOWEVER, THE 18z GFS DEVELOPS 93L AND TURNS IT AWAY FROM THE EAST COAST OF THE U.S..

AS FOR THE NO NUMBER INVEST, THIS SYSTEM WILL NOT STAND A CHANCE IF IT TRACKS NORTH EITHER, HOWEVER SOME MODELS TAKE A WEAK SYSTEM INTO THE CARIBBEAN IN TIME AND DEVELOPS SOME IN THE GULF OF MEXICO.

RTW

477 
ABNT20 KNHC 071730
TWOAT 

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 PM EDT Sat Aug 7 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

Showers and thunderstorms associated with a broad area of low 
pressure located a little more than 100 miles south of the 
southwesternmost Cabo Verde Islands have increased today.  Some 
gradual additional development is possible during the next day or 
so but strong upper-level winds and cooler waters are likely to 
prevent significant development after that time. The system is 
expected to move generally west-northwestward to northwestward 
across the eastern tropical Atlantic at 10 to 15 mph.  Regardless 
of development, locally heavy rainfall and gusty winds are 
possible over portions of the southernmost Cabo Verde Islands 
tonight and Sunday. 
* Formation chance through 48 hours...low...30 percent. 
* Formation chance through 5 days...low...30 percent.

A small but well-defined area of low pressure located over the 
tropical Atlantic about a thousand miles west of the Cabo Verde 
Islands continues to produce limited shower activity. Environmental 
conditions are expected to become a little more favorable for 
gradual development over the next several days, and this system 
could become a tropical depression by the middle of next week.  
The system is forecast to drift toward the west-southwest or west 
during the next couple of days, and then move a little faster 
toward the west-northwest early next week. 
* Formation chance through 48 hours...low...20 percent. 
* Formation chance through 5 days...medium...40 percent.

A tropical wave located over the west-central tropical Atlantic 
is producing limited shower and thunderstorm activity.  Significant 
development of this system is not anticipated as it moves 
west-northwestward across the Lesser Antilles and eastern Caribbean 
Sea during the early to middle part of next week. 
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...10 percent.

$$
Forecaster Brown 




STORM INVEST 92L



STORM INVEST 93L






Friday, August 6, 2021

RTW TRACKING THE TROPICS UPDATE AUG 6, 2021 03:36 PM EDT

 

NATIONAL HURRICANE CENTER TROPICAL OUTLOOK

000
ABNT20 KNHC 061738
TWOAT 

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
200 PM EDT Fri Aug 6 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

A large area of disorganized cloudiness and showers located a few 
hundred miles south of the Cabo Verde Islands is associated with 
a tropical wave and an associated broad area of low pressure.  
Environmental conditions appear somewhat conducive for gradual 
development over the next several days, and a tropical depression 
could form late this weekend or early next week while the system 
moves generally west-northwestward across the tropical Atlantic. 
* Formation chance through 48 hours...low...30 percent. 
* Formation chance through 5 days...medium...60 percent.

A tropical wave located over the west-central tropical Atlantic 
is producing limited shower activity. Development, if any, of this 
system is expected to be slow to occur as it moves west- 
northwestward and approaches the Lesser Antilles early next week. 
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.

$$
Forecaster Brown/Hagen




 






RTW TRACKING THE TROPICS UPDATE AUG 6, 2021

 

STORM INVEST 92L DISORGANIZED AT THIS TIME.  THERE IS STILL IS A CHANCE THAT THIS WAVE WILL BECOME A DEPRESSION DURING THE COMING DAYS.  AS LONG AS 92L STAYS AT THE LOWER LATITUDES THERE IS A CHANCE FOR DEVELOPMENT BUT IF IT TRACKS FURTHER NORTH OVER THE CENTRAL ATLANTIC, THEN IT WILL RUN INTO SAHARA DUST/DRY AIR LAYER WHICH WILL HINDER DEVELOPMENT.

SOME OF THE MODELS SUGGEST THAT IT WILL BE A SHORT LIVED STORM SYSTEM,  BUT SOME SHOW IT RETURNING AS A WEAK LOW NEAR FLORIDA.  THE WEAKER THE SYSTEM THE FURTHER WEST IT WILL TRACK.  

AS FOR THE INVEST EAST OF THE SOUTH AMERICA THIS SYSTEM STILL HAS A CHANCE FOR ORGANIZATION AS IT MOVES NORTH OF THE LEEWARD ISLANDS. 

RTW

NATIONAL HURRICANE CENTER

000
ABNT20 KNHC 061131
TWOAT 

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Fri Aug 6 2021

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

A large area of disorganized cloudiness and thunderstorms located a 
few hundred miles south of the Cabo Verde Islands is associated with 
a tropical wave interacting with a broader surface trough.  
Environmental conditions appear somewhat conducive for gradual 
development over the next several days, and a tropical depression 
could form late this weekend or early next week while the system 
moves generally west-northwestward across the tropical Atlantic. 
* Formation chance through 48 hours...low...30 percent. 
* Formation chance through 5 days...medium...60 percent.

A trough of low pressure located over the central tropical Atlantic 
continues to produce some disorganized showers and thunderstorms.  
This system is expected to move slowly west-northwestward, and 
some slow development is possible early next week as it approaches 
the Lesser Antilles.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.

$$
Forecaster Brown/Hagen