Tropical Weather Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
AXPZ20 KNHC 230911
TWDEP

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED APR 23 2014

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 FROM 4N96W TO 3N110W TO 6N130W TO 3N135W TO 4N140W.
SCATTERED MODERATE ISOLATED STRONG CONVECTION FROM 2N-5N BETWEEN
100W-105W AND FROM 3N-10N BETWEEN 115W-135W.

...DISCUSSION...

AN UPPER LEVEL RIDGE ACROSS THE FAR NW PORTION OF THE DISCUSSION
AREA N OF 20N W OF 130W. AN UPPER LEVEL TROUGH EXTENDS FROM
NORTHERN BAJA CALIFORNIA SW TO 22N120W. A BROAD UPPER LEVEL
RIDGE IS E OF THE TROUGH ACROSS NORTHERN MEXICO. EXCEPT FOR SOME
HIGH LEVEL MOISTURE WITHIN 200 NM E OF THE TROUGH AXIS STRONG
SUBSIDENCE WITH DRY AND STABLE AIR AT THE MIDDLE AND UPPER
LEVELS IS FROM 15N-30N W OF 105W. IN THE DEEP TROPICS AN UPPER
LEVEL ANTICYCLONIC CIRCULATION IS CENTERED NEAR 9N124W. UPPER
LEVEL DIFFLUENCE WITH THE ANTICYCLONE IS ENHANCING CONVECTION
FROM 3N-10N BETWEEN 115W-135W.

A LARGE SURFACE RIDGE IS N OF 15N W OF 115W. THE PRES GRADIENT
BETWEEN THE RIDGE AND THE ITCZ IS TIGHT ENOUGH FOR 15-20 KT
TRADE WINDS AND SEAS TO 9 FT IN NW SWELL FROM 7N-20N W OF 120W.
LARGE CROSS EQUATORIAL SLY SWELL WILL SPREAD ACROSS A LARGE
PORTION OF THE AREA S OF 15N WITHIN THE NEXT 24 TO 48 HOURS.

$$
DGS


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.