Tropical Weather Discussion

axpz20 knhc 300910

Tropical weather discussion
NWS National Hurricane Center Miami FL
1005 UTC Thu Mar 30 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 0600 UTC surface analysis and satellite imagery through 
0900 UTC.

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

ITCZ extends from 05n96w to 02n130w. No significant convection 
associated with the ITCZ. A surface trough reaches from 12n107w 
to 06n119w. Scattered moderate convection is within 60 nm north 
of trough between 110w and 113w.


Offshore waters within 250 nm of Mexico...

A ridge extends se from high pressure centered near 33n140w to 
the revillagigedo islands. Moderate breezes off Baja California 
will increase north of 27n late Friday through Saturday as a 
weak cold front off the coast of Southern California pushes into 
the area. Winds will diminish Saturday night and Sunday as high 
pressure builds over the area. Seas will remain 8 to 9 ft in 
northwest swell off the entire Baja California coastline today, 
then decay below 8 ft off Baja California sur. Swell will remain 
7 to 9 ft off Baja California norte through the weekend. 

The cold front will support a brief period of strong northwest 
winds and near gale westerly gap winds over the far northern 
Gulf of California late tonight into Friday. Elsewhere, gentle 
to moderate northwest winds will persist across the Gulf of 
California through the period.

Light to gentle winds will prevail elsewhere through the rest of
the week. 

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

Gap wind events are not expected to be very significant the next 
several days across the Central American coastal and offshore 
waters. Light to gentle winds and 3-5 ft seas are expected to 
prevail over the forecast waters the next several days.

Remainder of the area...

Strong 1030 mb high pressure located near 33n140w dominates the 
forecast waters north of 20n. The pressure gradient between the 
high and lower pressure near the Equator is supporting fresh 
trade winds from roughly 12n to 20n west of 130w. Seas in this 
area are 8 to 11 ft, in a mix of long period northwest swell and 
shorter period northeast wind waves. The aerial extent of the 
trades will diminish through Friday as the high moves west and 
weakens slightly. Marine conditions over the forecast region 
will change little during the next few days under the influence 
of this broad ridge. Large NW swell associated with a stalling 
cold front NW of the area will reach the northwest part of the 
forecast area Saturday night with seas building to 10-13 ft by 
Sunday evening. 



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