The Bureau of Meteorology has issued a severe thunderstorm warning for the ACT, parts of South Coast, Southern Tablelands and Snowy Mountains forecast districts.
The warning was issued late Wednesday afternoon.
Wind was gusting at 69km/h at Goulburn Airport at 5pm, up from 35km/h at 4.30pm, Bureau data showed.
The forecaster has warned that a line of thunderstorms about the southeast may produce damaging wind gusts.
The storms, developing east of a surface trough have been tracking east across the state.
The SES urges people to:
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