000
AXPZ20 KNHC 252158
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
2205 UTC THU JAN 25 2007

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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2145 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 3N77W 6N85W 4N95W 7N113W 4N140W. 
SCATTERED MODERATE WITHIN 120 NM OF AXIS E OF 92W.

...DISCUSSION...

A REX BLOCK EXISTS OVER NW OLD MEXICO WITH THE CYCLONE CENTER 
NEAR 28N110W AND THE ANTICYCLONIC CENTER NEAR 35N114W. ANOTHER 
DEEP LAYERED CYCLONE IS CENTERED NEAR 39N128W...SHIFTING E WITH 
TIME WHILE TRAILING A SHORTWAVE INTO THE DISCUSSION AREA TO BASE 
NEAR 14N120W. AND ASSOCIATED SURFACE FRONT IS LOSING ITS SE PUSH 
ALONG 32N126W 25N140W. 

A N TO S UPPER TROUGH IS NOTED FROM 9N103W TO TO 1N105W. A SMALL 
UPPER TROPICAL CYCLONE IS NEAR 20N135W. A BAND OF DRY UPPER AIR 
IS NOTED FROM 13N TO 23N W OF 115W THEN NARROWS AND CONTINUES NE 
ACROSS OLD MEXICO S OF THE UPPER CYCLONE. AN UPPER ANTICYCLONE 
OVER VENEZUELA NEAR 9N64W HAS A RIDGE EXTENDING NW TO NEAR 
20N99W. ASSOCIATED UPPER DIFFLUENCE IS ENHANCING THE ITCZ E OF 
92W.

A GALE EVENT CONTINUES OVER THE GULF OF TEHUANTEPEC...BUT WINDS 
ARE ONLY EXPECTED TO REACH 40 KT OR SO AND THE ENTIRE EVENT 
SHOULD BE OVER BY FRI AFTERNOON. WINDS OVER THE GULF OF PAPAGAYO 
ARE REMAINING PERSISTENTLY NEAR 20 KT WITH A FEW EPISODES OF 
WINDS REACHING 25 KT.

$$
NELSON