000
AXPZ20 KNHC 012158
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU APR 01 2010

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

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2100 UTC.

...ITCZ...
AXIS ALONG 05N77W TO 06N110W TO O2N140W.  SCATTERED MODERATE 
CONVECTION WITHIN 120 NM N AND 90 NM S OF AXIS FROM 127W-135W.  

TWO TROUGHS EMBEDDED IN ITCZ...ONE FROM 04N125W TO 11N120W WITH 
SCATTERED MODERATE CONVECTION WITHIN 120 NM W OF TROUGH N OF 
08N.  SECOND TROUGH FROM 02N119W TO 08N117W WITH SCATTERED 
MODERATE CONVECTION WITHIN 240 NM E OF TROUGH S OF 05N.

...DISCUSSION...
SHARP LONG-WAVE TROUGH MOVING INTO WESTERN U.S. AND NW MEXICO 
EXTEND SW TO 32N114W TO 17N140W.  HEALTHY SW JET STREAM 135 KT 
SE OF TROUGH ADVECT ENORMOUS AMOUNTS OF TROPICAL MOISTURE AND 
ITCZ CONVECTIVE DEBRIS ACROSS CENTRAL MEXICO INTO CENTRAL TEXAS. 
SURFACE TROUGH MAKING ITS WAY NOW THROUGH WESTERN TEXAS LIKELY 
USE IT FOR MORE RAINFALL OVER SE TEXAS.  

BROAD MID TO UPPER LEVEL ANTICYCLONE AT 09N95W HAS RIDGE CREST 
ALONG 98W TO EASTERN TEXAS WITH MODERATE TO STRONG SUBSIDENCE 
UNDER ITS UMBRELLA...FOR THE TIME BEING.  DRY AND STABLE AIR 
MASS REMAIN IN POSITION OVER E PAC S OF 20N E OF 110W.

ELSEWHERE AT THE SURFACE...
STATIONARY HIGH PRES 1031 MB WELL NW OF BASIN WEAKENS AND 
DIMINISHES FRESH TRADES FROM 06N-20N W OF 120W BY END OF 
FORECAST PERIOD. SIMILARLY FRESH NW BREEZE ALONG BOTH COASTS OF 
BAJA CALIFORNIA WILL DIMINISH BELOW 20 KT BY LATE SAT. 

TWO WEAK TROUGHS EMBEDDED IN ITCZ CONTINUE MOVING W INTO 
SLIGHTLY ADVERSE UPPER LEVEL ENVIRONMENT SO NO SIGNIFICANT 
INTENSIFICATION IS EXPECTED...AND DEFINITELY NO CYCLONIC 
ORGANIZATION.

GAP WINDS...
GULF OF PAPAGAYO STRONG BREEZE EXPECTED TO DIMINISH BELOW 20 KT 
BY LATE FRI.

FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
WALLY BARNES