000
AXPZ20 KNHC 221507
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC THU MAR 22 2007

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1500 UTC.

...ITCZ...
ITCZ IS CENTERED ALONG 4N77W 6N90W 5N105W 7N115W 4N140W. 
SCATTERED MODERATE ISOLATED STRONG WITHIN 150 NM N AND 60 NM S 
OF AXIS FROM 106W AND 109W AND WITHIN 60 NM EITHER SIDE OF AXIS 
FROM 133W TO 137W.

...DISCUSSION...
AN UPPER LEVEL CYCLONIC CIRCULATION OFF THE COAST OF THE BAJA 
PENINSULA NEAR 29N117W. A MID/UPPER LEVEL TROUGH EXTENDS FROM 
THE CIRCULATION TO 21N118W TO 18N126W. A 95-105 NLY JET IS W OF 
THE CIRCULATION FROM SOUTHERN CALIFORNIA TO 26N120W. ANOTHER 
95-105 KT SW-W JET EXTENDS FROM 23N140W 21N115W THEN NE ACROSS 
SOUTHERN BAJA CALIFORNIA AND INTO NW MEXICO. AN AREA OF DEEP 
LAYER MOISTURE WITH WIDELY SCATTERED SHOWERS IS OVER NORTHERN 
MEXICO SE OF THE JET STREAM. 

AN UPPER LEVEL ANTICYCLONE IS NEAR 9N127W WITH A MID/UPPER LEVEL 
RIDGE EXTENDS ENE FROM THE ANTICYCLONE THROUGH 15N105W THEN NE 
ACROSS MEXICO AND INTO TEXAS. ANOTHER UPPER TROUGH EXTENDS FROM 
THE SW CARIBBEAN SWD TO OVER PANAMA TO THE COAST OF ECUADOR.
THE TROUGH IS AIDING STRONG CONVECTIVE CLUSTERS OVER WRN 
COLOMBIA. OTHERWISE SUBSIDENCE AND DRY AIR IS N OF THE ITCZ TO 
20N E OF 107W.

SURFACE HIGH PRES RIDGE WITH AXIS FROM 32N140W TO 18N117W. 
BROKEN TO OVERCAST STRATOCUMULUS CLOUDS WITH POSSIBLE ISOLATED 
LIGHT SHOWERS N OF 13N AND W OF 120W. A SURFACE TROUGH ALONG THE 
ITCZ EXTENDS FROM 9N116W TO 3N121W...WITH WIDELY SCATTERED 
SHOWERS NEAR THE TROUGH. ANOTHER TROUGH IS ANALYZED ALONG THE 
ENTIRE LENGTH OF THE GULF OF CALIFORNIA.

$$
DGS