000
AXPZ20 KNHC 100839
TWDEP 

PZ20 KNHC DDHHMM
TWDEP

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON APR 10 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 0830 UTC.

...ITCZ...
ITCZ AXIS ALONG 8N81W 4N90W 7N120W 4N133W 7N140W.
SCATTERED STRONG 90 NM EITHER SIDE OF LINE 9N118W 5N125W. 
SCATTERED MODERATE ISOLATED STRONG WITHIN 60 NM EITHER SIDE OF 
AXIS BETWEEN 88W AND 96W...AND WITHIN 60-90 NM EITHER SIDE OF
AXIS BETWEEN 128W AND 135W. 

...DISCUSSION...

W OF 110W...
VERY DEEP TROUGH FOR SO LATE IN THE SEASON EXTENDS FROM AN 
EVOLVING CYCLONIC CIRCULATION NEAR 25N126W SWWD THROUGH 30N127W
TO 21N140W. THE SW END OF THE TROUGH WAS BEGINNING TO SPLIT OFF 
FROM THE MAIN TROUGH AND AN AREA OF MODERATE TO STRONG 
SUBSIDENCE WAS INDICATED FROM 18N TO 24N W OF 130W. AXIS OF 
SUBTROPICAL JTST CARVED OUT THE BASE OF THE TROUGH ROUGHLY 
THROUGH 19N140W 23N125W NEWD THROUGH THE FAR NW CORNER OF BAJA 
CALIFORNIA INTO THE FOUR CORNERS REGION OF THE U.S. AT THE 
SURFACE A WEAKENING TROUGH EXTENDED THROUGH 30N121W TO 22N130W.  

FURTHER S...AN UPPER LEVEL ANTICYCLONE NEAR 6N124W
DOMINATED THE DEEP TROPICS W OF 108W. UPPER LEVEL FLOW AROUND 
THE ANTICYCLONE WAS PROVIDING AN OUTFLOW MECHANISM FOR CLUSTERS 
OF STRONG CONVECTION ALONG A SURFACE TROUGH WHICH EXTENDED FROM
9N120W TO 4N126W.  

E OF 110W...
HIGH AMPLITUDE RIDGE WITH AXIS ALONG 105W COVERS THE AREA N OF 
20N AND DOMINATES THE FLOW OVER MEXICO. SUBTROPICAL JTST NOTED W 
OF 110W WAS ADVECTING MID TO UPPER LEVEL MOISTURE NEWD OVER NRN 
MEXICO. FURTHER S...AN UPPER LEVEL CYCLONIC CIRCULATION NEAR 
9N99W WAS BECOMING BETTER ORGANIZED AND WAS SURROUNDED BY AN 
AREA OF STRONG SUBSIDENCE WITHIN 300 NM OF THE CIRCULATION.  
BROADLY DIFFLUENT SW FLOW E OF THIS CIRCULATION WAS ENHANCING 
CONVECTION ALONG THE ITCZ BETWEEN 88W AND 96W. 

GAP WINDS...
NLY WINDS OF 20 KT...PERHAPS 25 KT AT TIMES ARE EXPECTED OVER 
THE GULF OF TEHUANTEPEC THROUGH THE NEXT 48 HOURS. NWP MODELS 
ARE SUGGESTING DIURNAL VARIABILITY WITH THESE WINDS WITH THE 
PEAK WINDS OCCURRING IN THE EVENINGS. 

COBB