000
AXPZ20 KNHC 310918
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON JAN 31 2011

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...
AXIS IS ALONG 5N80W 4N105W 9N121W 6N140W. NO SIGNIFICANT 
CONVECTION.

...DISCUSSION...
UPPER LEVEL TROUGH OVER THE FAR W PORTION OF THE DISCUSSION AREA 
WITH AXIS FROM 27N137W TO A SMALL CYCLONIC CIRCULATION NEAR 
24N138W  TO 15N140W. A LARGE AREA DEEP LEVEL TROPICAL MOISTURE 
WITH BROKEN/OVERCAST MULTILAYERED CLOUDS IS E OF THE TROUGH FROM 
5N-20N BETWEEN 120W-135W. DOWNSTREAM UPPER LEVEL RIDGE EXTENDS 
FROM 32N130W TO 20N115W. DEEP LAYER TROUGH ACROSS THE WESTERN 
U.S. EXTENDS S TO NORTHERN BAJA CALIFORNIA. A 95-105 KT JET 
STREAM EXTENDS FROM 26N121W ACROSS CENTRAL BAJA CALIFORNIA INTO 
NORTHERN MEXICO WHERE WINDS INCREASE TO 120 KT. A BROAD UPPER 
LEVEL RIDGE FROM NORTHERN MEXICO TO 13N94W.

IN THE DEEP TROPICS ACROSS THE FAR SW PORTION OF THE AREA WSW 
WINDS 70-75 KT S OF 5S W OF 120W. MODERATE TO STRONG SUBSIDENCE 
WITH DRY STABLE AIR AT THE MIDDLE AND UPPER LEVELS IS NOTED S OF 
8N.

SURFACE HIGH PRES RIDGE WITH AXIS FROM 32N130W TO 18N105W. 
FLOW AROUND THE SOUTHERN PERIPHERY OF THE RIDGE IS PRODUCING 20 
KT TRADES FROM 12N-20N W OF 125W. ELY WINDS 20-25 KT THROUGH THE 
GULF PAPAGAYO WILL DECREASE TO LESS THAN 20 KT TONIGHT.

$$
DGS