000
AXPZ20 KNHC 270347
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC WED AUG 27 2008

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

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...TROPICAL WAVES...

TROPICAL WAVE IS ALONG 92W N OF 5N MOVING W 15-20 KT. WHILE 
WIDESPREAD SW TO W LOW-LEVEL FLOW LIES ACROSS THE PACIFIC 
PORTION OF THE WAVE...A FAIR AMOUNT OF CYCLONIC TURNING IS 
ASSOCIATED WITH THE N PORTION OVER THE W CARIBBEAN SEA AND THE 
YUCATAN PENINSULA. LOW-LEVEL CONVERGENCE IS PRODUCING SCATTERED 
MODERATE TO STRONG CONVECTION ALONG THE COAST OF GUATEMALA FROM 
12N TO 16N BETWEEN 89W AND 94W.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 10N86W 12N93W 08N105W 12N120W 
10N140W. SCATTERED MODERATE TO STRONG CONVECTION IS FROM 12N TO 
16N BETWEEN 89W AND 94W. SCATTERED MODERATE CONVECTION IS FROM 
9N TO 12N BETWEEN 125W AND 135W. 

...DISCUSSION...

N OF 20N...
JULIO HAS SPUN DOWN TO A REMNANT LOW CONSISTING OF ONLY A SMALL 
SWIRL OF LOW-LEVEL CLOUDS AT 28.5N 111.7W. SOME ASSOCIATED 
MOISTURE HAS SPREAD INLAND OVER NW MEXICO AND THE SW U.S. 
OTHERWISE...A PAIR OF UPPER HIGHS DOMINATE THE SUBTROPICAL EPAC. 
ONE IS CENTERED W OF THE S PORTION OF BAJA CALIFORNIA NEAR 
24N116W AND THE OTHER IS LOCATED N OF THE HAWAIIAN ISLANDS NEAR 
29N157W. A SLIGHT WEAKNESS LIES BETWEEN THESE SYSTEMS ASSOCIATED 
WITH A WEAKENING TROUGH FROM S CALIFORNIA TO 27N130W. THIS 
PATTERN IS ENHANCING WIDESPREAD DRY AIR ALOFT IN THE MID AND 
UPPER LEVELS...EXCEPT  NEAR THE COAST OF MEXICO WHERE SCATTERED 
SHOWERS ARE POSSIBLE. AT THE SFC...HIGH PRES 1026 MB CENTERED 
NEAR 37N142W DOMINATES THE PATTERN PRODUCING MAINLY MODERATE NE 
TRADES. LATEST ASCAT PASS DOES SHOW A SURGE OF N WINDS AND 
ASSOCIATED SWELL SPREADING TO NEAR 30N BETWEEN 120W-125W...WITH 
THE STRONGEST WINDS TO GALE FORCE OFF THE N CALIFORNIA COAST. 

S OF 20N...
FAIRLY SWIFT MID TO UPPER FLOW LIES E OF 115W ON THE S PERIPHERY 
OF RIDGING CENTERED NEAR THE S PORTION OF BAJA CALIFORNIA. THIS 
FLOW IS ADVECTING MOISTURE FROM THE TROPICS AND FROM MAINLAND 
MEXICO ENHANCING SCATTERED SHOWERS AND TSTMS WITHIN THE ITCZ. 
WHILE THE UPPER FLOW LIGHTENS W OF 115W... CONVECTION IS A BIT 
MORE ORGANIZED DUE TO A NWD PERTURBATION IN THE ITCZ ALONG 
125W...OUTLINED IN THE ITCZ SECTION ABOVE. 

$$
FORMOSA