Tropical Weather Discussion

axpz20 knhc 250920

Tropical weather discussion 
NWS National Hurricane Center Miami FL
1005 UTC Wed Apr 25 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 Colombia near 
07n77w to 06n98w, where the ITCZ continues westward to 07n117w 
to 06n140w. Scattered moderate isolated strong convection is 
within 75 nm south of the axis between 93w and 99w. 


Offshore waters within 250 nm of Mexico...

A ridge west of Baja California will strengthen by this weekend. 
Moderate to fresh northwest flow in offshore waters will become 
fresh to locally strong Fri through Sat night. Fresh to strong 
northerly winds are possible in the Gulf of Tehuantepec this 
weekend. Light to gentle W to NW winds are expected in the Gulf 
of California through Saturday. 

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

Fresh northeast nocturnal winds are expected in and downstream 
of the Gulf of papagayo through tonight. Gentle nocturnal flow 
is forecast this week downstream of the Gulf of Panama. Gentle 
to moderate offshore flow will prevail elsewhere N of 09n, while 
light to gentle SW winds are expected S of 09n. 

Remainder of the area... 

A weakening cold front from 30n134w to 26n140w will move slowly 
east then dissipate later today. 7-9 ft NW swell associated with 
the front will gradually subside through tonight. A ridge will 
build behind the front Thu and Fri. Fresh northeast trade winds 
and 7-8 ft seas are observed across the tropical waters between 
08n and 17n, south of the subtropical ridge and north of the the 
ITCZ. Little change is expected through the remainder of the 

7-8 ft southerly swell observed south of the Equator between 90w 
and 120w will gradually subside through Thursday morning.



View All Hurricanes and Tropical Cyclones

Category 6

Welcome to Category 6. This is the collective home for Weather Underground's featured writeups by Dr. Jeff Masters (right), Bob Henson (left), Chris Burt, and other regular contributors.

Learn more about and the hurricane season in our hurricane archive.

View All Hurricanes and Tropical Cyclones

Hurricane Archive

All Atlantic Storms (1851-2018)

Named Storms for 2016

Historical Hurricane Statistics

Articles of Interest