Forecast issued at 4:30 pm EDT on Monday 22 December 2014.
A high pressure system over the Tasman Sea is drifting slowly east, while a broad trough lies near the western border of New South Wales. The deepening of this trough during the next day or two, assisted by an influx of warm and humid tropical air, is expected to bring a period of unsettled weather which will affect most districts. It is likely that the trough will become more mobile during the second half of the week, shifting towards the northeast in response to an approaching upper-level system.
Forecast for the rest of Monday
Cloudy. Very high (90%) chance of showers. A thunderstorm likely. Light winds becoming northwest to northeasterly 15 to 20 km/h in the evening.
Tuesday 23 December
Cloudy. Very high (95%) chance of showers. A thunderstorm likely. Winds north to northwesterly 15 to 20 km/h becoming light in the early afternoon. Overnight temperatures falling to between 14 and 17 with daytime temperatures reaching 23 to 28.
Fire Danger - Australian Capital Territory: Low-Moderate
UV Alert from 8:50 am to 5:20 pm, UV Index predicted to reach 13 [Extreme]
Wednesday 24 December
Cloudy. High (80%) chance of showers, most likely in the morning and afternoon. A thunderstorm likely in the afternoon and early evening. Winds west to northwesterly 15 to 20 km/h becoming light early in the morning. Overnight temperatures falling to between 13 and 16 with daytime temperatures reaching 22 to 27.
Thursday 25 December
Partly cloudy. Slight (30%) chance of a shower. The chance of a thunderstorm in the afternoon. Winds north to northeasterly 15 to 20 km/h turning west to northwesterly during the day. Overnight temperatures falling to between 13 and 16 with daytime temperatures reaching 24 to 30.
Friday 26 December
Mostly sunny. Winds west to northwesterly 15 to 25 km/h becoming light during the afternoon then becoming easterly 15 to 20 km/h during the evening. Overnight temperatures falling to between 11 and 15 with daytime temperatures reaching 20 to 26.
The next routine forecast will be issued at 5:15 am EDT Tuesday.