000
AXPZ20 KNHC 081533
TWDEP 

TROPICAL WEATHER DISCUSSION  
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1605 UTC SAT APR 08 2006

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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY 
THROUGH 1500 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 6N78W 5N95W 5N110W 7N118W 6N130W 
6N140W. SCATTERED MODERATE ISOLATED STRONG CONVECTION IS WITHIN 
30 NM OF THE AXIS FROM 91W-95W...BETWEEN 127W-132W...AND W OF 
138W. ISOLATED MODERATE IS WITHIN 60 NM OF THE AXIS FROM 
83W-89W AND 115W-120W.
 
...DISCUSSION...
MID/UPPER LEVEL TROUGH COVERS THE NW PORTION OF THE DISCUSSION 
AREA N OF 18N W OF ABOUT 130W. SHORTWAVE TROUGH LOCATED JUST NW 
OF THE AREA IS MOVING RAPIDLY SEWD AND WILL BE MOVING INTO THE 
AREA SHORTLY. THIS TROUGH IS EXPECTED TO AMPLY THE LONGWAVE 
TROUGH OVER THE AREA DURING THE NEXT 24 HOURS. BROAD 90-100 KT 
JET STREAM IS LOCATED SE OF THE TROUGH ALONG THE LINE 20N135W 
25N130W THEN INTO SRN CALIFORNIA. AT THE SURFACE...A DISSIPATING 
COLD FRONT EXTENDS ALONG 30N122W TO 25N130W. ANOTHER COLD FRONT 
ASSOCIATED WITH THE SHORT WAVE TROUGH IS FORECAST TO ENTER THE 
NW PORTION OF THE AREA LATER TODAY. 

LARGE MID/UPPER LEVEL HIGH IS CENTERED OVER THE TROPICAL PACIFIC 
NEAR 10N115W. RIDGE EXTENDS NNE FROM THE HIGH ACROSS THE BAJA 
PENINSULA INTO THE SW UNITED STATES. A LARGE AREA OF 
ANTICYCLONIC FLOW COVERS THE REMAINDER OF THE PACIFIC SE OF
THE JET STREAM NOTED ABOVE AND W OF ABOUT 102W.
 
AN UPPER TROUGH EXTENDS FROM THE BAY OF CAMPECHE ACROSS MEXICO 
JUST W OF THE ISTHMUS OF TEHUANTEPEC TO ALONG 15N97W 10N100W 
3N105W. WITHIN 600 NM NW OF THE TROUGH IS AN AREA OF STRONG 
SUBSIDENCE. E OF THE TROUGH N OF THE ITCZ MAINLY S TO SWLY 
UPPER FLOW IS SEEN. SOUTH THE ITCZ THE UPPER FLOW IS MAINLY 
WLY.

$$
BROWN