Major Flood Warning for Mary River: Major Flooding Forecast for Tiaro and Moderate Flooding for Gympie

Alert Details

The Australian Government Bureau of Meteorology (BOM) has issued a Major Flood Warning (IDQ20790) for the Mary River catchment. The warning was issued at 3:02 pm AEST on Monday, March 9, 2026, in response to heavy to locally intense rainfall observed across the region since Friday evening.

Affected Areas

The following geographic regions and river locations are included in this warning:

• Mary River: Tiaro, Miva, Gympie, Dagun Pocket, and Maryborough (Portside Alert)
• Tributaries: Six Mile Creek and Tinana Creek
• General Region: Mary River downstream of Gympie and the Mary River to Gympie reach

What You Should Do

Residents in the affected areas are advised to monitor conditions closely as the situation is being updated by the Bureau of Meteorology. A Flood Watch is currently in effect for most of Queensland, and a Severe Weather Warning for heavy rainfall remains active for large parts of southeast Queensland, including portions of the Mary River catchment.

Expected Conditions

Widespread moderate flooding is occurring or forecast throughout the catchment. Specific projections include:

• Tiaro: Currently at 11.44 m and rising. It is expected to exceed the major flood level (12.00 m) Monday afternoon and may reach a prolonged major peak near 14.30 m.
• Gympie: Currently at 10.91 m and rising. It is likely to exceed the moderate flood level (12.00 m) Monday evening, with a potential peak near 13.00 m.
• Miva: Currently at 14.28 m and rising. A peak near 14.80 m is expected overnight Monday into Tuesday.
• Maryborough: Currently at 3.75 m. It is likely to exceed the minor flood level (5.00 m) late Monday afternoon, with a forecast peak near 7.00 m.
• Dagun Pocket: Expected to rise above the minor flood level (7.00 m) and may peak near the moderate level (13.00 m).

Timeline

The alert is effective as of Monday afternoon, March 9, 2026. Major flooding is expected at Tiaro starting Monday afternoon and extending over most of Tuesday. Peak river levels at Gympie and Dagun Pocket are anticipated early Tuesday morning, while Maryborough is expected to peak Tuesday evening. Further rainfall is forecast for the remainder of Monday and into Tuesday, which may lead to higher river levels than currently projected.