000
AXPZ20 KNHC 152157
TWDEP 

TROPICAL WEATHER DISCUSSION NWS 
TPC/NATIONAL HURRICANE CENTER 
2205 UTC FRI SEP 15 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2145 UTC.

...SPECIAL FEATURES...

HURRICANE LANE IS NEAR 20.6N 106.3W 985 MB AT 15/2100 UTC MOVING 
N NW OR 340 DEG AT 8 KT WITH MAXIMUM SUSTAINED WINDS OF 70 GUSTS 
TO 85 KT. NUMEROUS MODERATE TO STRONG CONVECTION IS NOTED WITHIN 
90 NM OF CENTER. SCATTERED MODERATE AND ISOLATED STRONG 
CONVECTION IS NOTED ELSEWHERE WITHIN 150 NM EITHER SIDE OF LINE 
20N106W 17N110W. AN EYE IS MAKING OCCASIONAL APPEARANCES IN 
SATELLITE IMAGERY AND IS ESTIMATED AT 8 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 83W N OF 5N ESTIMATED TO BE MOVING W AT 
12 KT. BROAD CYCLONIC TURNING IS NOTED ALONG THE WAVE AXIS AT 7N 
BUT ONLY A FEW TSTMS ARE ENHANCED WITHIN 60 NM OF 7N87W. 

...ITCZ...
AXIS 9N83W 6N93W 13N119W 8N132W 10N140W. SCATTERED MODERATE 
ISOLATED STRONG CONVECTION IS NOTED WITHIN 90 NM EITHER SIDE OF 
LINE 5N78W 7N87W 4N92W 13N106W 16N115W 6N133W 8N140W. 

...DISCUSSION...
AN UPPER CYCLONE IS NEAR 31N145W WITH ITS ENVELOPE OF UPPER 
CYCLONIC FLOW EXTENDING SW ACROSS THE DISCUSSION AREA NW OF LINE 
22N140W 32N134W.

IMMEDIATELY TO THE N...AN UPPER ANTICYCLONE IS NEAR 35N135W WITH 
A RIDGE EXTENDING SE TO A SHARP CREST AT 30N129W. ANOTHER 
ANTICYCLONE IS AT 20N126W WITH A RIDGE SW ALONG 17N140W TO A 
CREST AT 13N152W. JUST E OF THIS RIDGE A SLIGHTLY NEGATIVE TILT 
SHORTWAVE TROUGH HAS ITS MEAN AXIS ALONG 35N119W TO 27N115W. DRY 
UPPER AIR IS INDICATED WITHIN 240 NM EITHER SIDE OF LINE 32N106W 
25N125W. 

THE ANTICYCLONE ASSOCIATED WITH HURRICANE LANE IS AT 22N106W 
WITH A RIDGE SW TO NEAR 17N118W. A SURFACE LOW PRES IS ANALYZED 
AT 17N115W 1008 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 
15N140W TO 26N109W. 

AN INVERTED UPPER TROUGH LIES ALONG 8N82W TO THE EQUATOR AT 88W. 

ELSEWHERE AT THE SURFACE A RIDGE EXTENDS ALONG 32N136W 22N120W. 

$$
NELSON