000
AXPZ20 KNHC 220943
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED MAR 22 2006

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 
0800 UTC.

...ITCZ...
ITCZ AXIS ALONG  3N78W  5N89W  3N97W  4N117W  2N137W  3N140W. 
NO SIGNIFICANT CONVECTION.

...DISCUSSION...
W OF 100W...
DEEP LAYER LONGWAVE TROUGH EXTENDS FROM CYCLONIC VORTEX NEAR 
NEAR 36N11W TO 32N11W TO EQUATOR AT 126W.  DRY AIRMASS WITHIN 
TEN DEG EITHER SIDE OF AXIS N OF 17N AND FIVE DEG S OF 17N DUE 
TO MODERATE TO STRONG SUBSIDENCE.  UPSTREAM RIDGE BRINGS 
ABUNDANT MOISTURE ALOFT BEHIND TROUGH 110 KT JET CORE ENTERS 
AREA NEAR 24N140W.  JET APPEARS TO BE ABLE TO PIERCE DRY ENVIRON 
WITH MOISTURE ADVECTED ALL THE WAY TO CENTRAL MEXICO AND UNTO NW 
GULF OF MEXICO.  OTHERWISE...DRY AIR SUPPRESSES CONVECTION 
ALONG ENTIRE ITCZ. 

AT THE SURFACE...LARGE HIGH PRES CENTERED AT 31N130W CAUSES 
BRISK TRADES FROM9N TO 22N W OF 110W. 

E OF 100W...
BROAD MID TO UPPER LEVEL RIDGE WITH AXIS WELL E OF AREA COVERS 
REMAINDER OF FORECAST WATERS.  MODERATE TO STRONG SUBSIDENCE 
KEEPS A LID ON ANY DEVELOPMENT EXCEPT SOME MINOR ISOLATED DEEP 
CONVECTION ALONG ITCZ E OF 98W.

AT THE SURFACE...TAME CONDITIONS REMAIN AS PAPAGAYO GAP WINDS 
DIED DOWN EARLIER LAST NIGHT AND STRONG N WINDS OVER GULF OF 
TEHUANTEPEC ARE NOT EXPECTED TO START TILL 72 HRS WHEN 
REINFORCING COLD FRONT SWEEPS GULF OF MEXICO. 

$$
WALLY BARNES