#62 Postby Chacor » Fri Feb 26, 2010 9:17 am
WTPS11 NFFN 261200
TROPICAL DISTURBANCE ADVISORY NUMBER A13 ISSUED FROM RSMC NADI
Feb 26/1401 UTC 2010 UTC.
TROPICAL CYCLONE SARAH CENTRE [995HPA] [CAT1] WAS LOCATED NEAR 16.6S
163.2W AT 261200 UTC. POSITION FAIR BASED ON IR AND MICROWAVE
IMAGERY. CYCLONE SLOW MOVING. 10 MINUTE AVERAGED WINDS OF 35 KNOTS
CLOSE TO THE CENTRE, INCREASING TO 50 KNOTS IN THE NEXT 24 HOURS.
WINDS OVER 33 KNOTS WITHIN 120 NAUTICAL MILES OF CENTRE IN THE
SECTORS NORTHWEST THROUGH EAST TO SOUTHEAST AND WITHIN 060 NAUTICAL
MILES ELSEWHERE.
ORGANISATION HAS IMPROVED SIGNIFICANTLY OVER THE LAST 24 HOURS. UPPER
OUTFLOW GOOD TO NORTH,EAST AND SOUTH. SYSTEM REMAINS IN A MODERATELY
SHEARED ENVIRONMENT BUT IS ANTICIPATED TO MOVE INTO AREA OF
DECREASING SHEAR. SST AROUND 27C. DVORAK ANALYSIS BASED ON WRAP=0.6
YIELDING DT=3.0, PT AND MET AGREE. FT BASED ON DT THUS,
T3.0/3.0/D1.0/24HRS. GLOBAL MODELS AGREE ON A SOUTHEAST TRACK WITH
FURTHER INTENSIFICATION OVER THE NEXT 24 HOURS. THE SYSTEM EXPECTED
TO WEAKEN BEYOND 48 HOURS WHILE MOVING IT INTO COOLER SST AND
INCREASING SHEAR.
FORECAST:
AT 12 HRS VALID AT 270000UTC 17.2S 162.7W MOV SE 04 KTS WITH 40 KTS
WIND CLOSE TO THE CENTRE
AT 24 HRS VALID AT 271200UTC 17.9S 162.2W MOV SE 04 KTS WITH 50 KTS
CLOSE TO THE CENTRE
OUTLOOK:
AT 36 HRS VALID AT 280000UTC 18.4S 161.8W MOV SE 03 KTS WITH 50 KTS
WIND CLOSE TO THE CENTRE
AT 48 HRS VALID AT 281200UTC 18.6S 161.4W MOV SE 02 KTS WITH 40 KTS
CLOSE TO THE CENTRE
THE NEXT TROPICAL DISTURBANCE ADVISORY WILL BE ISSUED AROUND 262030
UTC.
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