747 
AXPZ20 KNHC 050902
TWDEP 

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Wed Sep 5 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. 

...SPECIAL FEATURES...

Hurricane Olivia centered near 16.9N 121.2W at 0900 UTC, moving 
W at 10 kt. Estimated minimum central pressure is 965 mb. 
Maximum sustained winds are 100 kt with gusts to 120 kt. 
Numerous moderate to strong convection is within 75 nm of the 
center, and scattered moderate isolated strong convection is 
noted elsewhere within 150 nm of the center. Olivia is forecast 
to continue westward, then west-northwest, and gradually weaken 
through Fri. See latest NHC forecast/ advisory under AWIPS/WMO 
headers MIATCMEP2/WTPZ22 KNHC for more details.

...TROPICAL WAVES...

The axis of a tropical wave is along 98W N of 05N. Scattered 
moderate isolated strong convection is noted from 06N to 16N 
between 93W and 100W. 

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

The monsoon trough extends from 09N84W to 09N93W to 11N100W to a 
low pres near 11N105W to 08N112W, then resumes SW of Olivia near 
13N123W to 12N140W. Scattered moderate to strong convection is 
from 04N to 08N E of 82W. Scattered moderate convection from 09N 
to 13N between 126W and 134W. 

...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO... 

A surface trough will meander between the the Gulf of California 
and the Baja California Peninsula the next few days. A ridge is 
forecast to build across the region later today as Olivia moves 
further away from the offshore forecast waters. However, swell 
generated by Olivia will continue to propagate across the 
offshore waters through tonight. 

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

The monsoon trough will linger near 09N/10N during the next few 
days. Winds on both sides of the trough axis will be gentle to 
moderate, and 4-6 ft seas expected today. Long period SW swell 
will propagate into the region, building seas to 8-9 ft by Fri, 
first between Ecuador and Galapagos Islands, and then into the 
pacific waters of Costa Rica and Panama. 

REMAINDER OF THE AREA...   

Please see the Special Features section above for details on 
Hurricane Olivia. 

Hurricane Norman is well west of the forecast area. Associated 
winds and seas will continue to diminish over forecast waters 
today. Otherwise, a ridge dominates the forecast waters N of 20N 
W of 120W, with gentle to moderate winds. Seas generated by 
Olivia will continue to propagate mainly across the waters from 
10N to 25N between 115W and 135W during the next couple of days. 
  
$$
Mundell