000
AXPZ20 KNHC 301515
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE MAR 30 2010

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1500 UTC.

...ITCZ...
AXIS IS ALONG 3N78W 5N105W 7N120W 3N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION WITHIN 60 NM EITHER SIDE OF AXIS FROM 
78W-85W. SCATTERED MODERATE TO STRONG CONVECTION WITHIN 90 NM N 
AND 60 NM S OF AXIS FROM 117W-121W.

...DISCUSSION...
A BROAD UPPER LEVEL TROUGH IS OVER THE FAR NW PORTION OF THE 
DISCUSSION AREA N OF 20N W OF 135W. BROKEN HIGH CLOUDS E OF THE 
TROUGH AXIS ARE FROM 20N-25N W OF 135W. DOWNSTREAM BROAD UPPER 
LEVEL RIDGE WITH AXIS FROM THE NEW MEXICO/MEXICO BORDER ACROSS
CENTRAL BAJA CALIFORNIA TO 23N121W. MODERATE TO STRONG 
SUBSIDENCE WITH DRY STABLE AIR ALOFT IS FROM 20N-30N E OF 120W.
AN UPPER LEVEL TROUGH EXTENDS FROM THE TEXAS/MEXICO BORDER NEAR 
BROWNSVILLE ACROSS N CENTRAL MEXICO TO 20N113W. AN 80-90 KT
JET STREAM SE OF THE TROUGH FROM 18N110W ACROSS SOUTHERN MEXICO.
IN THE DEEP TROPICS AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS
CENTERED NEAR 8N121W WITH RIDGE FROM THE CIRCULATION NW TO 
15N132W. A WEAK TROUGH SEPARATES THE ANTICYCLONIC CIRCULATION
FROM ANOTHER RIDGE FROM THE EQUATOR AT 95W TO NICARAGUA. UPPER
LEVEL DIFFLUENT FLOW WITH THE ANTICYCLONIC CIRCULATION IS
ENHANCING CONVECTIVE ACTIVITY ASSOCIATED WITH A SURFACE TROUGH
AND THE ITCZ.

WEAK COLD FRONT EXTENDS FROM 32N126W TO 28N136W. NO SIGNIFICANT 
WEATHER ASSOCIATED WITH THE FRONT. LARGE SWELLS ARE MOVING INTO
THE NW PORTION OF THE AREA AND WILL BUILD AND SPREAD SE. SURFACE
HIGH PRES RIDGE COVERS THE ARE N OF 15N W OF 110W. FLOW AROUND
THE PERIPHERY OF THE RIDGE ARE BRINGING TRADE WINDS TO 20-25 KT.
A COUPLE OF SURFACE TROUGHS ARE ANALYZED ALONG THE ITCZ. THE 
FIRST EXTENDS FROM 10N115W TO 5N120W. SCATTERED MODERATE TO 
STRONG CONVECTION ASSOCIATED WITH THE TROUGH AND THE ITCZ IS
FROM 6N-8N BETWEEN 117W-121W. ANOTHER TROUGH WITH AXIS FROM
7N-3N ALONG 126W. A 1008 MB SURFACE LOW ALONG THE TROUGH NEAR
5N126W. A FEW SHOWERS ARE NEAR THE LOW PRES.

WINDS IN THE GULF OF TEHUANTEPEC HAVE DECREASED TO BELOW GALE
FORCE AND ARE EXPECTED TO DROP BELOW 20 KT EARLY WED.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
DGS