WTPA41 PHFO 210902
TCDCP1

TROPICAL STORM OMEKA DISCUSSION NUMBER   5
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI   CP012010
1100 PM HST MON DEC 20 2010

THE LOW-LEVEL CIRCULATION CENTER OF OMEKA HAS BECOME COMPLETELY 
DEVOID OF DEEP CONVECTION THIS EVENING...WITH THE NEAREST 
THUNDERSTORMS LOCATED ALMOST 50 NM NORTHEAST OF THE EXPOSED CENTER. 
THE LATEST UW/CIMSS ESTIMATE INDICATES WESTERLY VERTICAL WIND SHEAR 
IN THE VICINITY OF OMEKA IS NEAR 28 KT. LATEST DVORAK INTENSITY 
ESTIMATES PROVIDED BY THE FIX AGENCIES WERE 2.0 FROM SAB...WHILE HFO 
AND JTWC INDICATED THE INTENSITY WAS 2.5. THEREFORE...HAVE KEPT THE 
INITIAL INTENSITY AS 35 KT AT 0600Z. HOWEVER...FOR THIS ADVISORY 
PACKAGE...WHICH IS SENT OUT AT 0900Z...WE HAVE TRANSITIONED OMEKA TO 
AN EXTRATROPICAL GALE LOW. 

THE CURRENT FORECAST TRACK IS CLOSE TO THE PREVIOUS ONE THROUGH 24 
HOURS...WITH A TURN TOWARD THE EAST NORTHEAST...FOLLOWING THE 
CONSENSUS OF THE MODEL FORECASTS AT 36 HOURS. EVEN THOUGH OMEKA MAY 
BE UNDERGOING SOME WEAKENING...HAVE DECIDED TO KEEP IT AS A GALE LOW 
THROUGH 24 HOURS FOR THE HIGH SEAS FORECASTS...SINCE THE SYSTEM WILL 
SOON BE OF CONCERN MAINLY TO MARINE INTERESTS ONCE IT DEPARTS THE 
NORTHWEST HAWAIIAN ISLANDS. THE 36 HOUR FORECAST ASSUMES THE SYSTEM 
WILL WEAKEN OR BE ABSORBED BY ANOTHER EXTRATROPICAL SYSTEM ONCE IT 
HAS MOVED FURTHER NORTH OVER COLDER WATERS.
 
BASED ON THE INITIAL POSITION AT 0900Z...THE CENTER OF OMEKA IS JUST 
EAST OF LISIANSKI ISLAND IN THE NORTHWEST HAWAIIAN ISLANDS...FAR 
WEST OF THE MAIN HAWAIIAN ISLANDS. SINCE MOST OF THE STRONG...GUSTY 
WINDS AND ADVERSE WEATHER APPEAR TO BE EAST OF THE CENTER...THE 
CONDITIONS AT LISIANSKI ISLAND APPEAR TO BE SOMEWHAT LESS 
THREATENING. ANY PERSONS ON ISLANDS AND ATOLLS EAST OF LISIANSKI 
ISLAND MAY BE EXPERIENCING GALE FORCE WINDS WITH INTERMITTENT HEAVY 
RAINFALL. THESE ADVERSE WEATHER CONDITIONS IN THE NORTHWEST HAWAIIAN 
ISLANDS SHOULD BEGIN TO GRADUALLY IMPROVE DURING THE DAY ON TUESDAY.

THIS IS THE LAST ADVISORY ISSUED BY THE CENTRAL PACIFIC HURRICANE
CENTER ON OMEKA. FUTURE INFORMATION ON THIS SYSTEM CAN BE FOUND IN
HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE IN
HONOLULU...HAWAII UNDER AWIPS HEADER HSFNP AND WMO HEADER FZPN40
PHFO.
 
FORECAST POSITIONS AND MAX WINDS
 
INITIAL      21/0900Z 26.2N 173.4W    35 KT...POST-TROP/EXTRATROP
 12HR VT     21/1800Z 28.5N 172.6W    35 KT...POST-TROP/EXTRATROP
 24HR VT     22/0600Z 31.8N 171.8W    35 KT...POST-TROP/EXTRATROP
 36HR VT     22/1800Z 34.1N 169.0W    30 KT...POST-TROP/EXTRATROP
 
$$
FORECASTER HOUSTON