000
AXPZ20 KNHC 190905
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC WED MAR 19 2008

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

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...ITCZ...
ITCZ AXIS ALONG 5N77W 1N100W 6N115W 3N140W. SCATTERED MODERATE 
WITHIN 120 NM S OF AXIS FROM 106W TO 110W AND 120 NM N OF AXIS 
FROM 113W TO 116W. SCATTERED MODERATE ISOLATED STRONG WITHIN 75 
NM EITHER SIDE OF AXIS FROM 117W TO 121W AND WITHIN 60 NM N OF 
THE AXIS FROM 129W TO 132W

...DISCUSSION...
MID/UPPER LEVEL RIDGE IS AMPLIFYING OVER THE WRN PORTION OF THE 
AREA FROM 32N135W TO 20N125W TO AN ANTICYCLONIC CIRCULATION NEAR 
9N120W. MID/UPPER LEVEL MOISTURE IS STREAMING INTO THE REGION W 
OF THE RIDGE AXIS. STRONG SHORTWAVE IS OVER MEXICO APPROACHING 
THE RIO GRANDE VALLEY AN UPPER LEVEL TROUGH TRAILS BEHIND THE 
SHORT WAVE FROM SOUTHERN GULF OF CALIFORNIA TO 15N111W. MODERATE 
TO STRONG SUBSIDENCE IS N OF 15N BETWEEN THE TROUGH AND RIDGE 
AXIS. SW WINDS E OF THE TROUGH ARE ADVECTING ITCZ MOISTURE INTO 
SOUTHERN MEXICO AND INTO THE GULF OF MEXICO. ELSEWHERE BROAD 
RIDGE EXTENDS FROM THE SE U.S. ACROSS THE YUCATAN PENINSULA TO 
8N91W. 

SURFACE STATIONARY 1031 MB HIGH IS CENTERED NEAR 31N138W WITH A 
RIDGE SE FROM THE RIDGE TO 15N110W. HIGH PRES COVERS THE AREA N 
OF 12N W OF 110W. A SURFACE TROUGH IS ANALYZED FROM 14N102W TO
7N107W. SCATTERED SHOWERS ARE WITHIN 180 NM W OF THE TROUGH AXIS.
COLD FRONT CURRENTLY MOVING THROUGH THE NW GULF OF MEXICO WILL
MOVE THROUGH SOUTHERN MEXICO TONIGHT WITH GALE FORCE WINDS 
EXPECTED TO DEVELOP IN THE GULF OF TEHUANTEPEC.

$$
DGS