Tropical Weather Discussion

axpz20 knhc 240910

Tropical weather discussion 
NWS National Hurricane Center Miami FL
1005 UTC Tue Apr 24 2018 

Tropical weather discussion for the eastern Pacific Ocean from 
the Equator to 32n, east of 140w. The following information is 
based on satellite imagery, weather observations, radar, and 
meteorological analysis.

Based on 0600 UTC surface analysis and satellite imagery through 
0900 UTC.

...Intertropical convergence zone/monsoon trough... 

A surface trough extends west from the coast of Panama near 
08n78w to 05n98w, where the ITCZ continues westward to 06n140w. 
Scattered moderate isolated strong convection is noted from 05n 
to 11n between 108w and 1317w.  


Offshore waters within 250 nm of Mexico...

A ridge will meander west of Baja California during the next 
several days, with gentle to moderate NW winds and 4 to 7 ft 
seas expected west of the Baja Peninsula. The pressure gradient 
is forecast to tighten on Wed, resulting in fresh NW flow near 
the coast Thu and Fri. 

Gulf of tehuantepec: fresh to strong nocturnal flow this morning 
will diminish later today, and remain moderate to fresh the rest 
of the week. 

Offshore waters within 250 nm of Central America, Colombia, and 
within 750 nm of Ecuador... 

Gulf of papagayo: fresh northeast nocturnal winds are expected 
tonight, with seas building to 6-7 ft downstream near 11n88w. 
Moderate to fresh nocturnal flow is expected the rest of the 

Elsewhere, gentle to moderate offshore flow will prevail N of 
09n, while light to gentle SW winds are forecast S of 09n. 

Remainder of the area... 

A cold front reaching 30n140w will weaken from 30n136w to 
26n140w this evening, then dissipate on Wed. Large 8-10 ft NW 
swell will affect the area NW of a line from 30n128w to 22n140w 
tonight and Wed. 

Fresh northeast trades and 6-8 ft seas are observed across the 
tropical waters north of the ITCZ to 17n, with little change 
expected through the remainder of this week. 

Southerly swell, in the form of 7-8 ft seas, currently observed 
south of 02s west of 90w will gradually subside through Thu.



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