000
AXPZ20 KNHC 010917
TWDEP 

TROPICAL WEATHER DISCUSSION 
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC TUE JUN 01 2010

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 13N89W 9N105W 10N115W 7N125W 5N140W. SCATTERED 
MODERATE TO STRONG CONVECTION WITHIN 90 NM EITHER SIDE OF AXIS FROM 
108W-111W. SCATTERED TO NUMEROUS CONVECTION IS WITHIN 120 NM N OF 
AXIS FROM 116W-119W.

...DISCUSSION...
AN UPPER LEVEL TROUGH DOMINATES THE NORTHERN PORTION OF THE 
DISCUSSION AREA EXTENDING FROM NORTHERN BAJA CALIFORNIA COAST NEAR 
32N118W TO 26N130W 23N140W. MODERATE TO STRONG SUBSIDENCE WITH DRY 
STABLE AIR AT THE MID AND UPPER LEVELS IS WITHIN 300 NM SE OF THE 
TROUGH AXIS WITH UPPER LEVEL MOISTURE N OF THE TROUGH AXIS.

IN THE DEEP TROPICS AN UPPER LEVEL ANTICYCLONIC CIRCULATION IS 
CENTERED NEAR 10N138W. ANOTHER ANTICYLONIC CIRCULATION IS CENTERED 
NEAR 13N117W. ITCZ CONVECTION IS BEING ENHANCED ON THE SE-S SIDE OF 
THE ANTICYCLONIC CIRCULATION UNDER UPPER LEVEL DIFFLUENCE BETWEEN 
107W-120W. A WEAK 50-60 KT SUBTROPICAL JET ENTERS THE AREA NEAR 
18N140W AND EXTENDS NE-E AROUND THE NORTHERN PERIPHERY OF THE 
ANTICYCLONIC CIRCULATIONS TO THE SOUTHERN TIP BAJA CALIFORNIA.
SCATTERED TO BROKEN CIRRUS CLOUDS ARE WITHIN 300 NM S OF THE JET
W OF 130W.

SURFACE RIDGE COVERS THE AREA N OF 15N W OF 115W. THE PRES GRADIENT 
IS RATHER WEAK N OF THE ITCZ UNDER THIS RIDGE WITH ONLY A SMALL AREA 
OF NE 20 KT TRADES FROM 9N TO 20N W OF 135W. THESE TRADES WILL 
REMAIN CONFINED TO A SMALL AREA DURING THE NEXT DAY AND DROP BELOW 
THE 20 KT IN 48 HOURS.

A 1012 MB LOW PRES IS CENTERED NEAR 9N117W IS NEARLY STATIONARY. 
WINDS TO 20 KT ARE WITHIN ABOUT 120 NM OF THE CENTER. SCATTERED TO 
NUMEROUS MODERATE TO STRONG CONVECTION IS WITHIN 120 NM N SEMICICLE. 

$$
DGS