000
AXPZ20 KNHC 160320
TWDEP 

TROPICAL WEATHER DISCUSSION NWS 
TPC/NATIONAL HURRICANE CENTER 
0405 UTC SAT SEP 16 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0315 UTC.

...SPECIAL FEATURES...

HURRICANE LANE IS NEAR 21.7N 106.8W 970 MB AT 16/0300 UTC 
MOVING N NW OR 340 DEG AT 10 KT WITH MAXIMUM SUSTAINED WINDS OF 
90 GUSTS TO 105 KT. NUMEROUS MODERATE TO STRONG CONVECTION IS 
NOTED WITHIN 90 NM OF CENTER. SCATTERED MODERATE AND ISOLATED 
STRONG ELSEWHERE WITHIN 150 NM EITHER SIDE OF LINE 23N106W 
17N108W. AN EYE IS MAKING OCCASIONAL APPEARANCES IN SATELLITE 
IMAGERY AND IS ESTIMATED AT 5 NM. REFER TO LATEST NHC 
FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMEP3/WTPZ23 KNHC 
AND PUBLIC ADVISORY MIATCPEP3/WTPZ33 KNHC FOR MORE DETAILS.  

...TROPICAL WAVES...

A TROPICAL WAVE IS ALONG 84W N OF 5N MOVING W AT 12 KT. BROAD 
CYCLONIC TURNING IS NOTED ALONG THE WAVE AXIS AT 6N WITH A 
CLUSTER OF TSTMS ENHANCED ALONG 6N BETWEEN 86W AND 91W. 

...ITCZ...
AXIS 8N82W 7N94W 13N103W 14N118W 9N132W 10N140W. SCATTERED 
MODERATE ISOLATED STRONG WITHIN 90 NM EITHER SIDE OF LINE 5N87W 
6N101W 16N114W 6N136W. 

...DISCUSSION...
AN UPPER CYCLONE IS NEAR 31N142W WITH ITS ENVELOPE OF UPPER 
CYCLONIC FLOW EXTENDING SW ACROSS THE DISCUSSION AREA NW OF LINE 
20N140W 32N132W.

IMMEDIATELY TO THE N...AN UPPER ANTICYCLONE IS NEAR 35N135W WITH 
A RIDGE EXTENDING SE TO A SHARP CREST AT 33N133W. ANOTHER 
ANTICYCLONE IS AT 19N123W WITH A RIDGE SW ALONG 16N140W TO A 
CREST AT 15N151W. JUST E OF THIS RIDGE A SLIGHTLY NEGATIVE TILT 
SHORTWAVE TROUGH HAS ITS MEAN AXIS ALONG 37N119W TO 29N112W. DRY 
UPPER AIR IS INDICATED WITHIN 240 NM EITHER SIDE OF LINE 32N106W 
18N134W. 

THE ANTICYCLONE ASSOCIATED WITH HURRICANE LANE IS AT 22N105W 
WITH A RIDGE SW TO NEAR 15N128W. A SURFACE LOW PRES IS ANALYZED 
AT 18N115W 1005 MB MOVING NE 5 KT. THE UPPER RIDGE IS ENHANCING 
CONVECTION OVER THE SE SEMICIRCLE OF THIS LOW. RESULTANT DEBRIS 
MOISTURE FROM HURRICANE LANE AND FROM THIS SURFACE LOW IS 
ADVECTED SW WITH THE UPPER LEVELS QUITE MOIST SW OF A LINE FROM 
9N140W TO 25N109W. 

ELSEWHERE AT THE SURFACE A RIDGE EXTENDS ALONG 32N136W 22N118W. 

$$
NELSON