000
AXPZ20 KNHC 260400
TWDEP 

TROPICAL WEATHER DISCUSSION     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC FRI JAN 26 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0345 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 4N78W 6N85W 3N100W 9N112W 3N140W. 
SCATTERED MODERATE WITHIN 120 NM OF AXIS BETWEEN 81W AND 91W.

...DISCUSSION...

A REX BLOCK EXISTS OVER NW OLD MEXICO WITH THE CYCLONE CENTER 
NEAR 29N110W AND THE ANTICYCLONIC CENTER ESTIMATED NEAR 37N115W. 
ANOTHER DEEP LAYERED CYCLONE IS CENTERED NEAR 40N128W...SHIFTING 
E WITH TIME WHILE TRAILING A SHORTWAVE INTO THE DISCUSSION AREA 
TO BASE NEAR 18N117W. THE ASSOCIATED SURFACE FRONT IS LOSING ITS 
SE PUSH ALONG 32N127W 27N133W BLOCKED BY A SURFACE HIGH PRES 
27N127W 1020 MB. 

A N TO S UPPER TROUGH IS NOTED S OF 10N ALONG 100W. A SMALL 
UPPER TROPICAL CYCLONE IS NEAR 19N135W. A BAND OF DRY UPPER AIR 
IS NOTED WITHIN 360 NM EITHER SIDE OF LINE 17N140W 20N124W TO 
BEYOND 27N104W. AN UPPER ANTICYCLONE OVER VENEZUELA NEAR 7N63W 
HAS A RIDGE EXTENDING NW TO A CREST NEAR 22N103W. ASSOCIATED 
UPPER DIFFLUENCE IS ENHANCING THE ITCZ BETWEEN 91W AND 81W.

A WEAK GALE EVENT CONTINUES OVER THE GULF OF TEHUANTEPEC 
EXPECTED TO WEAKEN BELOW GALE FRI AFTERNOON. WINDS OVER THE GULF 
OF PAPAGAYO ARE REMAINING PERSISTENTLY NEAR 20 KT WITH A FEW 
EPISODES OF WINDS REACHING 25 KT.

$$
NELSON