Weak towering cumulus clouds congealed to form a weak rain shower. This "storm" never amounted to anything.

New storms formed as a wave of activity pushed into the Windsor area. Storms formed near Oil Springs and expanded northward. This one cell formed ahead of the mess over London and had some brief interesting characteristics. This was taken near Arva looking south.

After the London storm was eaten by the more dominant storms to the west I headed north and watched as a meso-triple point (storm scale feature) came together just west of Ilderton.

An isolated cell formed north of the main body of the storm system just north of Ilderton and popped out a lowering

There was some major convergence & forcing between the two storms, cloud motions intesified and stuff was happening at 10's of meters per second.

This was a huge outflow scud bomb shelf thingy facing towards the inflow from the south

This was all inflow and there was violent mixing above my head with a sharp temperature increase outside of the car as inflow winds overcome any outflow.

What may have been a brief wall cloud or inflow/shelf feature formed and I shot video since photos would not do it justice. After the main action started to press east of my location I snapped this photo of a tail cloud. There was some major inflow action along it.

After the storm(s) lost their structure I punched back through what was a rainy core and emerged on the east side of the complex near St.Mary's

This was a crappy ragged shelf cloud, it looked cool (I guess all clouds look cool to me) but it posed zero threat,

This wide shot gives an idea of perspective with regards to the size and scope of the flooding.

Persistent local rains in excess of 50mm created localized flash flooding. These vehicles in Concord (Vaughan) became flood victims.

Illuminated by the not too distant city lights, a massive shelf cloud comes into view as it bares down on Milton

The shelf/roll cloud slowly getting closer

As the MCS moved towards Milton around 1:50AM a shelf cloud & roll cloud developed

Hint hint - your looking for it sometime after 5PM

Mark Robinson and I spent the better part of the afternoon waiting for initiation which never came. We agreed it was a bust and went our ways. Just as I started east along hwy 9 towards the 400 a developing tower to my north with faint echoes on radar caught my attention.

This is how I planned to document what was quickly turning into a bust, beautiful crepuscular rays in Orangeville

Surprised I was! What started as a faint echo over Georgian Bay quickly grew and morphed into a beautiful mothership of a supercell which I intercepted near Baxter, ON.

Words can't describe what was going through my mind! The structure was unreal, and winds were south-easterly veering to southerly before a dry but still warm RFD kicked passed.

The storm did briefly produce a well defined wall cloud, but more impressive was the notched out RFD cut at the back of the storm

Easily the best structure of the year so far in Ontario. I can't believe there was no significant severe weather. It was a great storm!

Here is the 9PM meso-analysis sounding for the nearest airport effected by the supercell, by this time the supercell was passing through Baxter and south of Borden

Here is the 8PM meso-analysis sounding for the nearest airport effected by the supercell

As the day went on the RAP model consistently increased the amount of surface energy present with shear and tornado indices increasing

This was the first RAP model I really dug deep into. Numerous key shear elements were coming together to make the day "interesting"

Here's the core literally falling out of the storm over Milverton looking west from Poole

Near stationary storm near Poole, Ontario

Here's an idea of what I was seeing. Tough to explain in two dimensions but remember I'm looking east from the west.

These were the largest hail stones I saw (and had dinged me). This particular stone was around 3 cm (30mm) in diameter. From spike to spike about 4.5cm across (45 mm). The trees were well shredded in the community of Damascus (6 Line & Wellington Rd 16) where these hail stones fell. In fact the country side a couple km just west of town was where it was really bad.

In the strongest of the cores (this again near Damascus) hail covered the grass. In some places much smaller 1/2 - 1 cm sized hail stones were about 1 cm deep with thick low hail fog.

The temperature behind the mature storm I was chasing dropped from 20 something to probably 14 (damn cold!). It was chilly and this storm turned into a cold looking appendage of the prior storm which was producing the big hail. It actually looked energized and was cracking off lighting like crazy as it was rocketing up on the northern flank outflow from the hail storm. It was cool to watch as it went from a lively warm looking storm to cold cold March looking storm as it crossed into the cold outflow pool.

This was the last real intercept of the day. This storm exploded directly above Moorefield and was south of all the previous activity in a far warmer portion of the airmass which was now outflow laden to the north. This particular storm matured just east of Parker and continued to put on a show as it entered Belwood before becoming part of a larger sloppy MCS. it was far more linear than the other storms but the southern most flank was producing some strong outflow relative all the other convection I had seen earlier. I shot some video of the rain bands and wind whipping across a field and blasting a home.

The rain on the southern flank just behind the tail end of the flanking line dried right out and became a very turbulent dry rear flank downdraft that came across the field at a good 60 km/h. The air just ahead of the downdraft was warm and muggy. It was cool but spooky in a way to have light south-easterly winds while a whistling sound was growing louder to my west before POW I was hit with the chilly winds.

Whatever this storm was doing at the time it sure looked like it was rotating and trying to come together. This lowering was right on the SW flank of the storm, you can see the flanking line to the right (east) and turbulent scud/stratus curls towards the left (west).

Here is a wider shot showing what I was seeing! Best structure of the entire day. The structure lasted a good 15 - 20 minutes from start to finish before the storm was gobbled up into the MCS that eventually hit the Greater Toronto area. Great chase day none the less, nice to get out!