000
AXPZ20 KNHC 101536
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC WED MAR 10 2010

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 IS ALONG 05N77W 06N84W 06N115W 04N140W. ISOLATED MODERATE 
TO STRONG CONVECTION IS WITHIN 90 NM N AND 180 NM OF THE AXIS 
BETWEEN 77W TO 92W. SCATTERED MODERATE ISOLATED STRONG 
CONVECTION IS WITHIN 120 NM EITHER SIDE OF THE AXIS BETWEEN 116W 
AND 130W. ISOLATED STRONG CONVECTION IS WITHIN 120 NM S OF THE 
AXIS BETWEEN 137W AND 140W.

...DISCUSSION...
AN UPPER LEVEL TROUGH AXIS EXTENDS FROM THE SW CONUS OVER 
SOUTHERN ARIZONA TO 28N125W TO 22N140W. A STRONG JETSTREAM IS SE 
OF THIS UPPER LEVEL TROUGH AXIS WITH WESTERLY CORE WINDS OF 
125-170 KT FROM 20N140W 25N125W TO ACROSS THE CENTRAL BAJA 
CALIFORNIA PENINSULA AND ACROSS NORTHERN MEXICO INTO SOUTHERN 
TEXAS. SOUTHWESTERLY UPPER LEVEL WINDS CONTINUE TO ADVECT 
MOISTURE NORTHEASTWARD IN THE FORM OF BROKEN CIRRUS CLOUDS 
WITHIN 400 TO 500 NM SE OF THE JET. MODERATE TO STRONG 
SUBSIDENCE AND DRY STABLE AIR IS NOTED ON WATER VAPOR IMAGERY 
ALONG AND NORTH OF THE TROUGH AXIS AS IT CONTINUES TO GRADUALLY 
SHIFT E-SE.

A BROAD UPPER LEVEL RIDGE INFLUENCES THE REMAINDER OF THE 
DISCUSSION AREA WITH AN ANTICYCLONIC CIRCULATION CENTERED NEAR 
08N114W. ON THE WESTERN PERIPHERY OF THE UPPER RIDGE... 
DIFFLUENCE ALOFT IS PROVIDING FURTHER SUPPORT FOR THE ONGOING 
CONVECTION EMBEDDED WITHIN THE ITCZ...WHILE E OF 114W MOSTLY 
STABLE CONDITIONS EXIST N OF 08N...INCLUDING ACROSS SOUTHERN 
MEXICO AND CENTRAL AMERICA.

AT THE SURFACE...CONTINUED SURFACE RIDGING DOMINATES THE AREA N 
OF 10N W OF 105W. A LARGE AREA OF NE TO E TRADES OF 20 TO 25 KT 
IS NOTED ON THE SOUTHERN PERIPHERY OF THE RIDGE. ALSO...A PAIR 
OF SURFACE TROUGHS ARE ANALYZED S OF 09N AND ARE EMBEDDED WITHIN 
THE ITCZ AXIS...ONE ALONG 118W AND THE OTHER ALONG 125W. THESE 
REMAIN THE FOCUS OF ITCZ CONVECTION BETWEEN 116W AND 130W.

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

$$
HUFFMAN