TROPICAL WEATHER OUTLOOK JUNE 30 2018...0151 PM EDT

National Hurricane Center

...TROPICAL WAVES...

A tropical wave that has emerged off the west coast of Africa is
along 15W from 03N-14N. Scattered moderate convection is noted on
either side of the wave's axis from 05N-10.5N E of 18W to the
coast of Africa. The Hovmoller Diagram shows the westward propagation
of the wave, that also coincides with a moisture surge in the TPW
product.

A tropical wave has an axis extending from 04N27W to just W of 
the Cabo Verde Islands near 16N26W moving W around 10 kt. This 
wave is well defined in model diagnostics guidance and TPW 
animation. Scattered moderate convection is noted near the 
southern end of the wave from 03N to 06N between 22W and 26W. The 
the wave is nearly surrounded by dry Saharan air.

A tropical wave has an axis extending N from 05N51W to 18N50W and
is moving westward around 15 knots. Scattered moderate convection
is present where the wave meets the ITCZ from 03N to 07N between 
45W and 53W. Similar convection is noted near 10N50W. The wave 
shows up well in model diagnostics guidance and TPW product.
African dust surrounds the wave, that also shows an inverted V
pattern on visible satellite imagery. A patch of moisture with
embedded showers is noted ahead of the wave approaching the
Windward Islands. Tropical moisture associated with this feature
will reach the waters E of the Windward Islands late today, and 
move across the islands tonight into Sun, increasing the 
likelihood of showers and isolated tstms. 

A tropical wave has an axis extending N from NW Venezuela to the 
eastern Dominican Republic near 19N70W. This system is moving W 
between 10 and 15 kt and despite its longitude has dry Saharan 
dust on both sides. As a result, there is no significant convection
currently associated with this wave. Some moisture on the SE side
of this wave could enhance convection over the basin this weekend
before the wave reaches Central America by Sun night.

Another tropical wave has an axis extending over Guatemala and El
Salvador into the eastern Pacific region. This wave is slowing 
down and moving W at only around 5 kt. TPW satellite imagery and 
model diagnostics show this wave to be poorly defined. 

https://www.nhc.noaa.gov/ 

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Sahara Dry air and Dust and cool sea surface temperatures are

are suppressing tropical cyclone formation at this time...RTW

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