000
AXPZ20 KNHC 280915
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC MON MAY 28 2007

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.

...SPECIAL FEATURES...
TROPICAL DEPRESSION ONE-E IS NEAR 13.1N 112.4W WITH A LOWEST 
PRESSURE OF 1006 MB AT 0900 UTC AND IS MOVING W OR 270 DEG AT 5 
KT.  NUMEROUS MODERATE TO STRONG CONVECTION IS WITHIN 45 NM OF 
THE POINT 13.5N111.5W IN THE NORTHEAST QUADRANT AND WITHIN 90 NM 
OF THE POINT 12.3N113.7W MAINLY IN THE SOUTHWEST QUADRANT. 
FAVORABLE SEA SURFACE TEMPERATURES AND LIGHT ENVIRONMENTAL SHEAR 
SUPPORT THE FORECAST FOR CONTINUED SLOW DEVELOPMENT TO A 
TROPICAL STORM. 

...ITCZ...
INTERTROPICAL CONVERGENCE ZONE AXIS IS ALONG THE LINE...6N77W 
10N95W 7N115W 7N140W. SCATTERED MODERATE WITH ISOLATED STRONG 
CONVECTION IS EAST OF 80W. SCATTERED MODERATE TO STRONG 
CONVECTION IS WITHIN 150 NM OF THE POINT 9N102W.

...DISCUSSION...
WEAK MIDDLE LEVEL AND STRONG UPPER LEVEL TROUGH IS NORTH OF A 
LINE 20N100W 30N120W 20N140W.  THE AREA HAS LITTLE WEATHER AND 
IS DRY AND CLOUD FREE IN THE MIDDLE AND UPPER LEVEL WITH 
OVERCAST TO BROKEN STRATOCUMULUS IN THE LOWER LEVELS. 

WEAK CYCLONIC MOTION IS ALSO OBSERVED IN THE MIDDLE AND UPPER 
LEVELS NEAR THE TROPICAL CYCLONE WITHIN THE AREA NORTH OF THE 
ITCZ TO 20N FROM 102W TO 115W.

REMAINDER OF THE DISCUSSION AREA IS ANALYZED AS WEAK 
ANTICYCLONIC FLOW IN THE MIDDLE AND UPPER LEVELS. MOISTURE FROM 
CONVECTION IN THE ITCZ FROM 98W TO 105W IS ADVECTING NORTHEAST 
OVER SOUTHERN MEXICO AND GUATEMALA.

AT THE SURFACE WEAK RIDGE IS NORTH OF 17N WEST OF 110W. 
ELSEWHERE AT THE SURFACE EXCEPT FOR THE TROPICAL CYCLONE WEAK 
TROUGH IS ANALYZED.

$$
LL