[robair]

Gday All

For those who may be thinking of flying this arvo, beware inclement weather.

May lightning repeatedly strike the power lines and melt them into a glowing metallic pulp.

2141 UTC 22/10/09 AIRSERVICES AUSTRALIA
GENERAL MET MESSAGE BRIEFING



Prepared for: ROBFLIGHT

YSSY
IDN42903
AUSTRALIAN GOVERNMENT BUREAU OF METEOROLOGY
NEW SOUTH WALES

SYDNEY AIRPORT WEATHER BRIEFING
ISSUED AT 1709Z ON THE 22/10/2009 [0409 ON THE 23/10/2009 LOCAL]

SYDNEY TAF: (THIS TAF MAY NOT BE THE LATEST ISSUE)
TAF YSSY 221648Z 2218/2324
36008KT 9999 SCT020 SCT030
FM222300 05012KT 9999 SCT035
FM231000 18020KT 9999 FEW010 BKN020
FM231800 18012KT 9999 FEW015 SCT025
PROB30 TEMPO 2304/2311 3000 TSRA SCT015 SCT040CB
RMK
T 17 19 25 27 Q 1020 1019 1018 1016


TAF SUMMARY:
A HIGH IN THE TASMAN IS DIRECTING A NORTHERLY FLOW OVER SYDNEY, AND
IS BRINGING SOME LOW CLOUD. THE CLOUD SHOULD LIFT AND MOSTLY CLEAR BY
MID MORNING. WINDS AT THE AIRPORT WILL BE LIGHT NORTH TO NORTHWEST AT
FIRST TENDING NORTHEAST LATER THIS MORNING. A FRESH SOUTHERLY CHANGE
IS EXPECTED TO REACH THE AIRPORT THIS EVENING, WITH LOW CLOUD
INCREASING AGAIN OVERNIGHT. THUNDERSTORMS ARE LIKELY TO FORM ABOUT
THE FAR WESTERN SUBURBS THIS AFTERNOON, AND THERE IS THE CHANCE THAT
THE AIRPORT WOULD BE AFFECTED.

THUNDERSTORM POTENTIAL:
CHANCE WITHIN 20NM OF SYDNEY AIRPORT THIS AFTERNOON/EVENING.

OTHER POSSIBILITIES:

10% CHANCE THE LOW CLOUD WILL NOT BREAK BEFORE MIDDAY TODAY.
TIMING OF THE SOUTHERLY CHANGE +/- 2 HOURS.


SYDNEY OUTLOOK:
SATURDAY : CHANCE AFTERNOON SHOWER/THUNDERSTORM. CITY MAX: 26
SUNDAY : RAIN PERIODS. CITY MAX: 20

REGARDS
LILY UNTIL 7AM, THEN IAN.

NOTES:
1. THIS BRIEFING IS NOT AMENDED BETWEEN ROUTINE ISSUES. FOR
OPERATIONAL PLANNING, REFERENCE SHOULD BE MADE TO THE LATEST TAF OR
TTF.