000
AXPZ20 KNHC 230919
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SAT FEB 23 2013

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 
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...        
MONSOON TROUGH ALONG 5N78W 6N85W TO 2N90W. ITCZ FROM 2N90W TO 
5N125W TO 7N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION  
WITHIN 120 NM N AND 60 NM S OF AXIS FROM 135W TO 140W.

...DISCUSSION...
AN UPPER LEVEL TROUGH ACROSS THE NORTHERN PORTION OF THE 
DISCUSSION AREA WITH AXIS FROM THE CALIFORNIA/BAJA CALIFORNIA 
BORDER TO 27N135W. A WLY 95-105 KT JETSTREAM ENTERS THE AREA 
NEAR 20N140W TO 23N123W...WHERE WINDS INCREASE TO 105-115 KT. 
THEN ACROSS SOUTHERN BAJA CALIFORNIA INTO MEXICO. HIGH LEVEL 
MOISTURE IS WITHIN 600 NM S OF THE JET. IN THE DEEP TROPICS AN 
UPPER LEVEL TROUGH EXTENDS FROM 13N102W TO THE EQUATOR AT 105W. 
MODERATE TO STRONG SUBSIDENCE WITH DRY STABLE AIR AT THE MIDDLE 
AND UPPER LEVELS IS ACROSS THE AREA E OF 105W.

SURFACE HIGH PRES RIDGE IS N OF 15N W OF 115W. THE PRES GRADIENT 
AROUND THE SOUTHERN PERIPHERY OF THE RIDGE IS SUPPORTING 20-25 
KT ELY WINDS FROM 7N-20N W OF 130W. THESE CONDITIONS ARE 
FORECAST THROUGH SUN THEN DECREASE MON...HOWEVER NLY SWELLS WILL 
LINGER THROUGH SUN.

ELY WINDS 20-25 KT THROUGH THE GULF OF PAPAGAYO WILL DECREASE 
LATER TODAY.

LOW PRES IS FORECAST TO DEVELOP ACROSS SW TEXAS COMBINED WITH 
THE RIDGE TO THE W WILL RESULT IN STRONG NLY ACROSS THE GULF OF 
CALIFORNIA LATE SUN. 

$$
DGS