A private funeral was held Tuesday in Ayton, Ont. for an 11-year-old boy who died after a tornado ripped through the town of Durham last week.

Owen MacPherson died after an F2 tornado touched down there on Thursday. The boy had been attending a day camp at the local conservation area. The town itself suffered some significant damage, but MacPherson was the only person to die that day as a result of the severe weather.

Earlier, the Town of  the Blue Mountains declared a disaster in the wake of Environment Canada confirming that a tornado struck it.

The national weather agency said Monday that an F2 tornado struck the community, damaging homes, farms and a ski club.

Mayor Ellen Anderson said the community, northwest of Collingwood along Georgian Bay, couldn't make a formal declaration until the tornado was confirmed.

Ontario has a tornado disaster relief plan that provides two dollars in funding for every dollar raised locally.

The Town of the Blue Mountains is about 55 kilometres northeast of Durham. The same storm cell generated tornadoes in both places.

An eight-tornado day

Geoff Coulson, an Environment Canada emergency preparedness meteorologist, told ctvtoronto.ca that up to eight tornadoes -- six confirmed, two probable -- have been identified so far out of Thursday's weather system.

The agency has crews out Tuesday investigating a probabe site in the Haliburton highlands and a possible ninth site near Bancroft.

In a special weather statement updating on the storm damage, Environment Canada said a "triple-barrelled severe weather threat" struck southern Ontario.

Shortly after noon, a supercell storm developed just south of Lake Huron. This cell tracked northeastward for a remarkable 200 km producing the Durham and Thornbury tornadoes. The storm cell finally weakened over Georgian Bay toward evening," it said.

"At the same time a squall line developed over lower Michigan then tracked across Southern Ontario during the afternoon and evening hours. This feature produced straight line wind damage to several
locales from Windsor to well northeast of Toronto as well as the destructive Vaughan and Newmarket tornadoes."

An isolated supercell produeced a probable tornado between Arnstein and North Bay and a waterspout over Lake Nipissing.

The Gravenurst area has a confirmed tornado. It may have spawned another tornado that passed through the Redstone Lake and Kennisis Lake areas in the Haliburtons.

Here is a summary:

1. F2, from Durham to Markdale, about 20 kilometres. Significant house and trailer damage.

2. F2, from south of Thornbury to southeast (path, length unknown). Trees snapped, homes damaged, roofs removed.

3. F2, Woodbridge to Vaughan. Several kilometres long and 50 metres wide. Hundreds of homes damaged, trees downed, cars flipped.

4. F1, Newmarket area. Hockey arena almost demolished. Royal Canadian Riding Academy sustained damage.

5. F0. Gravenhurst. About 10 km long and up to 1 km wide. Shallow-rooted trees downed.

6. F1. Milton. Light standards downed. Roof damage to medical centre and hotel. Trees and fences down. Minor home damage.

7. Probable. Arnstein to Restoule to North Bay. Waterspout and tornado sightings. Damage details uncertain.

8. Probable. Redstone Lake and Kennisis Lake north of Haliburton. Tornado sightings. Trees downed and cottages damaged, but intensity uncertain at this time.

With files from The Canadian Press