The main story was the hail over central, eastern and northern parts of the city with nickel to marble sized hail reported in some areas (a storm that dumps nickel sized hail or larger is considered a severe thunderstorm here in Canada). The hail reportedly caused damage mainly to plants. Flowers and bushes at the Jardin St. Léon Garden Centre on St. Mary's Road were badly damaged according to CBC.
The storm put an end to a 289 day streak without thunderstorms in the city, the longest period on record without a thunderstorm. This was 3 days longer than the previous record.
It is also the second latest start to the thunderstorm season in Winnipeg. Second only to 1958 which didn't see its first storm until June 28.
Nickel sized hail and wind gusts over 60 km/h were reported at the airport around 4:30 pm. A look at the conditions seen at the airport at 4:32 pm can be seen in the metar snapshot below... I decoded some of the important stuff for you:
As usual with isolated events such as yesterday, rainfall amounts varied greatly across southern Manitoba and even within Winnipeg. Hard to believe if you were downtown, but parts of the southern and western ends of city didn't get a drop of rain. 9.6 mm fell at The Forks and 4.6 mm in western Transcona whereas parts of River Park South only had a trace and nothing fell in Charleswood. Here's some rain totals for the entire day yesterday across southern Manitoba from highest to lowest:
Here's a collection of pictures I took around south St Vital of the storm... (Spot the hail shaft!)