000
AXPZ20 KNHC 140912
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC FRI MAR 14 2008

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 2N78W 7N93W 2N105W 7N120W 4N140W. 
SCATTERED MODERATE ISOLATED STRONG CONVECTION WITHIN 150 NM N OF 
AXIS BETWEEN 1210W AND 125W.

...DISCUSSION...
MID TO UPPER LEVEL RIDGING IS PRESENT N OF 21N W OF 115W. AN 
UPPER LEVEL LOW MOVING SLOWLY N IS NUDGING UP AGAINST THE RIDGE 
AND IS JUST W OF THE AREA NEAR 17N141W WITH A TROUGH SE THROUGH 
9N140W TO 7N135W 4N125W. THE TWO FEATURES ARE PRODUCING 
CONFLUENT FLOW BETWEEN THEM RESULTING IN MODERATE TO STRONG 
SUBSIDENCE N OF 20N. A SHORTWAVE TROUGH IS MOVING ACROSS E TEXAS 
WITH ITS AXIS EXTENDING SW ACROSS NW MEXICO TO OVER SRN BAJA 
PENINSULA TO NEAR 20N115W. SUBTROPICAL JET IS SE OF THE 
SHORTWAVE  WITH 90-100 KT UPPER LEVEL WESTERLIES IN A NARROW 
ZONE FROM 22N106W ACROSS NRN MEXICO IN THE NW GULF OF MEXICO.  
MID/UPPER LEVEL MOISTURE IS STREAMING ENE FROM THE ITCZ TOWARDS 
CENTRAL MEXICO SE OF THE SUBTROPICAL JET STREAM. A STRONG 
MID/UPPER RIDGE AXIS LIES ALONG 14N E OF 105W TO ACROSS CENTRAL 
AMERICA INTO THE CENTRAL CARIBBEAN. STRONG EASTERLY WINDS TO THE 
S OF THIS RIDGE ARE ADVECTING CIRRUS BLOWOFF CLOUDS FROM 
CONVECTION N OF THE ITCZ AND OVER S AMERICA WNW TO NEAR 95W.

SURFACE RIDGE EXTENDS FROM 32N140W SEWD TO 17N111W. HIGH PRES 
COVERS THE AREA GENERALLY TO N OF 15N W OF 110W. BROKEN TO 
OVERCAST STRATOCUMULUS CLOUDS COVER THE AREA N 23N W OF THE BAJA 
PENINSULA TO 130W. A COUPLE OF SURFACE TROUGHS ARE ANALYZED
ALONG THE ITCZ ONE 12N95W TO 2N94W...ISOLATED SHOWERS ARE ALONG
THE TROUGH. ANOTHER TROUGH IS FROM 11N118W TO 4N120W...ISOLATED
SHOWERS ARE ALONG THE TROUGH N OF 8N.

$$
DGS