Severe Thunderstorm Warning Issued for Blue Mountains and Wollondilly Regions

Alert Details

The Australian Government Bureau of Meteorology (BOM) has issued a detailed Severe Thunderstorm Warning for intense rainfall, large hailstones, and damaging winds. This is a top-priority broadcast for a “very dangerous” thunderstorm currently affecting parts of New South Wales.

Affected Areas

The warning specifically covers parts of the following regions:

• Blue Mountains/Hawkesbury (specifically southwest of Katoomba)
• Wollondilly/Wingecarribee (specifically northwest parts of the Wollondilly Shire and the area west of Lake Burragorang)

What You Should Do

The State Emergency Service (SES) advises residents in the warning area to take the following actions:

• Park your car under secure cover and away from trees, powerlines, and drains.
• Secure or put away loose items around your house, yard, and balcony.
• Keep at least 8 metres away from fallen power lines or objects that may be energised.
• Keep clear of creeks and storm drains.
• Do not walk, ride your bike, or drive through flood water.
• If trapped by flash flooding, seek refuge in the highest available place and call 000 for rescue.
• Stay indoors away from windows, and keep children and pets indoors.
• For emergency help in floods and storms, contact the SES at 132 500.

Expected Conditions

A very dangerous thunderstorm was detected at 5:20 pm moving towards the northeast. The storm is likely to produce intense rainfall that may lead to dangerous and life-threatening flash flooding. Additionally, the system may produce large hailstones and damaging winds.

Timeline

• Issued: 5:50 pm Wednesday, 25 February 2026
• Storm Movement: Detected at 5:20 pm moving northeast.
• Impact Times: Forecast to affect northwest Wollondilly Shire and west of Lake Burragorang by 5:50 pm, and the Blue Mountains southwest of Katoomba by 6:20 pm.
• Expiry: The current alert window is effective until 8:50 pm, with the next update scheduled by 6:50 pm.