Home


524
AXPZ20 KNHC 200832
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Thu Sep 20 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 0830 UTC.


...SPECIAL FEATURES...

The remnants of Tropical Depression Nineteen-E inland along the coast of Mexico near 28.1N 110.0W, moving NNE at 8 kt. Maximum sustained winds are 20 kt with gusts to 30 kt. The remnant low will move further inland this morning, then dissipate in the afternoon. Scattered heavy showers associated with the low have moved inland. It will bring widespread heavy rain and gusty winds to parts of NW Mexico today. Life-threatening flash floods and landslides are possible. See the latest NHC public advisory under AWIPS/WMO headers MIATCPEP4/WTPZ34 KNHC for more details.


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

The monsoon trough extends from 09N79W to 12N110W, then resumes from low pressure near 17N119W to 13N125W to 12N140W. Scattered moderate convection is from 07N to 11N between 105W and 115W, and within 30 nm either side of the axis between 122W and 130W.


...DISCUSSION...

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Please see the Special Features section for details on the final advisory on Remnants of Tropical Depression Nineteen-E, located over northwest Mexico.

High pressure NW of the area supports moderate to fresh NW winds W of Baja California. Seas are 5-7 ft across the offshore waters. The pressure gradient will relax tonight, allowing the winds and seas to diminish this weekend. NW winds are expected to increase Mon and Tue as the gradient tightens W of the Baja peninsula.

A locally tight pressure gradient will support pulsing nocturnal northerly winds in the Gulf of Tehuantepec the next few nights.

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

Fresh offshore nocturnal winds will pulse across the Gulf of Papagayo the next several nights.

Cross-equatorial SW swell reaching the Central American coast will slowly subside this weekend. The monsoon trough will meander near 10N the next few days.

REMAINDER OF THE AREA...

An elongated surface trough extends from W of southern Baja to a weak 1010 mb low pressure area centered near 17N119W. Surface ridging prevails over the waters NW of the trough axis. Moderate to locally fresh trades are north of the trough west of 120W, supporting seas to 8 ft from 14N-19N W of 130W. These seas will subside during the next 2 days as the pressure gradient weakens.

$$ Mundell

Home