000
AXPZ20 KNHC 281515
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SUN MAR 28 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 
1200 UTC.

...ITCZ...
AXIS IS ALONG 5N77W 5N95W 8N105W 5N130W 3N140W. SCATTERED TO 
NUMEROUS STRONG CONVECTION WITHIN 150 NM N OF AXIS BETWEEN
114W-125W AND WITHIN 120 NM EITHER SIDE OF AXIS FROM 126-131W.
 
...DISCUSSION...
MIDDLE/UPPER LEVEL TROUGH OVER THE NW PORTION OF THE DISCUSSION 
AREA WITH THE AXIS FROM 32N132W TO 26N125W 22N140W. MODERATE TO 
STRONG SUBSIDENCE IS WITHIN 240 NM SE OF THE TROUGH AXIS. 
DOWNSTREAM A BROAD UPPER LEVEL RIDGE IS LOCATED N OF ABOUT 15N E 
OF 115W WITH MOSTLY ZONAL WLY FLOW THROUGH RIDGE. A 90-100 KT
JETSTREAM EXTENDS FROM 24N120W ACROSS SOUTHERN BAJA CALIFORNIA 
AND THEN INTO CENTRAL MEXICO. IN THE DEEP TROPICS AN UPPER LEVEL 
SHORTWAVE EXTENDS FROM 15N128W TO 10N126W. DIFFLUENT FLOW ALOFT 
IS ENHANCING CONVECTION ALONG THE ITCZ FROM 114W-131W. AN UPPER 
LEVEL ANTICYCLONIC CIRCULATION CENTERED OFF THE COAST OF 
NICARAGUA NEAR 10N89W. MODERATE TO STRONG SUBSIDENCE WITH DRY 
STABLE AIR AT THE MIDDLE AND UPPER LEVELS OF THE ATMOSPHERE 
COVERS THE AREA E OF 105W...WITH ONLY ISOLATED SHOWERS ALONG
THE ITCZ,

A DISSIPATING COLD FRONT ENTERS THE AREA AT 32N135W TO 28N140W.
SURFACE HIGH PRES...1024 MB...IS CENTERED NEAR 29N130W. FLOW 
AROUND THE PERIPHERY OF THE HIGH IS PRODUCING 20-25 KT TRADES
FROM 6N-20N W OF 125W. A TROUGH IS ANALYZED ALONG THE ITCZ OVER 
THE FAR SW PORTION OF THE DISCUSSION FROM 10N-1N ALONG 138W.
NO SIGNIFICANT WEATHER ASSOCIATED WITH THE TROUGH. ELY WINDS 
20-25 KT CONTINUE THROUGH THE GULF OF PAPAGAYO AND ARE EXPECTED 
TO DECREASE BELOW 20 KT EARLY MON. GALE FORCE WINDS ARE FORECAST
FOR THE GULF OF TEHUANTEPEC TONIGHT.

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

$$
DGS