000
AXPZ20 KNHC 241515
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
1605 UTC Mon Apr 24 2017

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 1200 UTC surface analysis and satellite imagery through 
1500 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH... 

A surface trough extends from the coast of Costa Rica near 
09N85W to 05N90w to 05N101W, where scatterometer winds indicate 
an ITCZ forms and extends west through an embedded trough near 
07N123W, then turns WSW to to 04N133W to beyond 04N140W. 
Scattered moderate isolated strong convection is noted from 05N 
to 12N between 113W and 123W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

A weak surface ridge extends from near 22N116W to 14N105W. 
Moderate to fresh northwesterly winds are observed south of 30N 
west of the Baja Peninsula, with 6 to 8 ft seas in long period 
NW swell. Strong to near gale force NW flow is observed north of 
the discussion area off the coast of Southern California. Strong 
NW winds and associated seas will spread south of 30N tonight, 
and reach near 25N by Tuesday night, then diminish Wednesday. 
Strong northwesterly winds are expected north of 28N late Wed 
night through Fri night, with combined seas of 11 to 16 ft. 

Gulf of Tehuantepec: A brief pulse of minimal gale force winds 
expected last night will quickly diminish to less than 20 kt by 
this afternoon. Expect maximum seas of 11 ft near 14.5N95W this 
morning to subside to less than 8 ft tonight. Gentle to moderate 
southerly flow is then expected the next several days.

Gulf of California: Fresh to strong nocturnal sw winds are 
expected tonight across the gulf waters from 29.5N to 31N, with 
seas building to about 5 ft. Mostly gentle to moderate southerly 
flow expected s of 29.5N along a trough that will meander over 
the region this week.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...

A gentle onshore breeze is expected during the day, becoming 
offshore along the coast at night. Combined seas of 3 to 5 ft in 
mixed SW and NW swell will prevail for the next several days.
 
REMAINDER OF THE AREA...
  
A ridge will meander from near 32N140W to 13N102W. Expect 7-8 ft 
moderate NW swell to gradually subside from the NW through mid- 
week. Strong NW winds and seas of 8-12 ft are expected north of 
28N E of 123W Wednesday night through Friday night. 

$$
Mundell