000
AXPZ20 KNHC 231516
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC TUE MAR 23 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 5N77W 7N85W 3N100W 6N120W 5N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 200 NM N OF AXIS FROM 
101W-106W AND WITHIN 100 NM N OF AXIS FROM 126W-130W.

...DISCUSSION...
AN UPPER LEVEL RIDGE OVER THE FAR NW PORTION OF THE DISCUSSION
AREA EXTENDS FROM 32N135W TO 11N140W. SOME HIGH LEVEL MOISTURE 
IS MOVING OVER THE TOP OF THE RIDGE...OTHERWISE MODERATE TO 
STRONG SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE AND UPPER
LEVELS OF THE ATMOSPHERE COVERS THE AREA N OF 15N W OF 120W.
WELL DEFINED UPPER LEVEL CYCLONIC CIRCULATION OFF THE COAST OF 
NORTHERN BAJA CALIFORNIA NEAR 31N117W WITH A TROUGH FROM THE 
CYCLONIC CIRCULATION TO 10N128W. MOST OF THE DEEP LAYER CLOUDS
E OF THE CIRCULATION HAVE MOVED INTO ARIZONA ALTHOUGH SHOWERS 
STILL REMAIN OVER THE FAR N PORTION OF THE BAJA PENINSULA. A 
95-105 KT JET STREAM IS SE OF THE CIRCULATION FROM 24N120W NE 
ACROSS CENTRAL BAJA CALIFORNIA AND INTO NORTHERN MEXICO. AN 
ANTICYCLONIC CIRCULATION IN THE DEEP TROPICS IS CENTERED NEAR 
12N95W WITH A RIDGE EXTENDING E TOWARD CENTRAL AMERICA WITH 
ANOTHER RIDGE EXTENDING W TO 8N120W.

SURFACE RIDGE COVERS THE AREA N OF 15N W OF 110W. THE RIDGE 
MAINTAINS 20 KT TRADES FROM 05N-20N W OF 125W. THE RIDGE ACTS AS 
A BARRIER TO COLD FRONT APPROACHING FROM NW TO MOVE TOO FAR S OF 
30N BEFORE DISSIPATING. A COUPLE OF SURFACE TROUGHS ARE ANALYZED
ALONG THE ITCZ. THE FIRST EXTENDS FROM 9N89W TO 1007 MB LOW NEAR
6N90W CONTINUES TO 2N90W. A FEW SHOWERS ARE NEAR THE LOW CENTER.
A SECOND TROUGH WITH AXIS FROM 11N117W TO 3N119W. NO SIGNIFICANT
WEATHER ASSOCIATED WITH THE TROUGH.

GULF OF TEHUANTEPEC WINDS DECREASED TO BELOW GALE FORCE EARLIER 
AND ARE EXPECTED TO BE BELOW 20 KT TONIGHT. GULF OF PAPAGAYO 
WINDS ARE ELY 20-25 KT WITH SEAS TO 10 FT. THIS IS EXPECTED TO 
CONTINUE THROUGH WED THEN DECREASE SOME OF THU.

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

$$
DGS