000
AXPZ20 KNHC 301536
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC FRI JAN 30 2009

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 ALONG 6N77W 3N110W 4N140W. SCATTERED MODERATE TO STRONG 
WITHIN 100 NM S OF AXIS FROM 77W TO 88W.

...DISCUSSION...
FLAT UPPER LEVEL RIDGE OVER THE FAR NW PORTION OF THE DISCUSSION 
AREA WITH AXIS FROM 30N133W TO 25N130W. A NEARLY E-W MID/UPPER 
LEVEL TROUGH FROM NORTHERN BAJA CALIFORNIA TO 30N130W. A 95-100 
KT JET STREAM EXTENDS FROM 24N140W 27N120W ACROSS THE CENTRAL 
BAJA PENINSULA THROUGH NORTHERN MEXICO. MID-UPPER LEVEL RIDGE 
EXTENDS FROM AN ANTICYCLONIC CIRCULATION CENTERED NEAR 6N96W NWD 
TO THE YUCATAN PENINSULA. A LARGE AREA OF MODERATE TO STRONG 
SUBSIDENCE WITH VERY DRY STABLE AIR AT THE MIDDLE AND UPPER 
LEVEL OF THE ATMOSPHERE IS LOCATED E OF 110W. SKIES ARE MOSTLY 
CLEAR ACROSS THIS AREA EXCEPT FOR SCATTERED TSTMS ALONG THE ITCZ 
AS DESCRIBED ABOVE. A TROUGH IN THE DEEP TROPICS WITH AXIS FROM 
13N126W TO A CYCLONIC CIRCULATION NEAR 4N122W TO THE EQUATOR AT 
115W.

SURFACE RIDGE WITH AXIS FROM 32N137W TO 16N129W WITH 
ANTICYCLONIC FLOW COVERING THE AREA N OF 16N W OF 125W. BROKEN 
TO OVERCAST STRATOCUMULUS CLOUDS WITHIN THE RIDGE N OF 15N W OF 
120W.

$$
DGS