000
AXPZ20 KNHC 271526
TWDEP 

Tropical Weather Discussion 
NWS National Hurricane Center Miami FL
1605 UTC Thu Apr 27 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 
1445 UTC.

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

A surface trough extends from 08N85W TO 07N90W TO 06.5N108W 
where scatterometer winds indicate that the ITCZ forms, and then 
continues WSW through 04N122 TO 05.5N133W TO BEYOND 04.5N140W. 
Scattered moderate isolated strong convection is noted within 
150 nm S of trough between 83W and 108W. Scattered to locally 
numerous moderate to strong convection is noted within 150 nm N 
and 90 nm S of the ITCZ between 108W and 140W.

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Strong to near gale force northwesterly winds are observed 
across the discussion waters n of 28N w of the Baja Peninsula to 
123W, with 8 to 13 ft seas that will increase to 15 ft tonight.
Moderate NW wind flow is expected elsewhere W of Baja today with 
5 to 8 ft seas in nw swell, that will gradually increase to 6 to 
9 ft seas from the N through Sat night.  These seas should 
subside to less than 8 ft to the s of 30N on Sun night into Mon.
Another pulse of NW swell will reach 30N120W on Mon night.

Gulf of California: Mostly gentle to moderate southwesterly flow 
is expected through Fri night with a brief fresh to locally 
strong breeze possible over the gulf waters N of 30N on Sat 
morning.

Gulf of Tehuantepec: Gentle to moderate southerly flow expected 
this weekend with fresh N winds possible around sunrise on Mon.

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

Mostly a gentle onshore breeze is expected during the next few 
days becoming offshore along the coasts at night. Combined seas 
of 4 to 5 ft in mixed SW and NW swell forecast during the next 
several days. Large long period SW swell will approach the 
offshore waters on Mon.  

REMAINDER OF THE AREA...
  
A ridge will meander from near 33N138W to near 12N107W. Strong 
NW winds, and seas of 8 to 12 ft expected N of 28N east of 125W 
today through early Sat. Fresh NE trades are expected between 
the ridge and the ITCZ, with seas 7 to 8 ft through the upcoming 
weekend. Southern hemispheric swell in the form of 7 to 9 ft 
seas, will reach the equator between 110W and 127W this 
Fri morning and reach along 12N110W on Sat night.

$$
Stripling