Hot and humid weather over southern MB today along with an approaching trough of low pressure will set the stage for the development of some strong thunderstorms this afternoon.. some of which may reach severe limits. A severe thunderstorm is defined as a thunderstorm producing one or more of the following..
- hail of 2 cm or more (nickel size or greater),
- wind gusts of 90 km/h or more
- rainfall of 50 mm in one hour or less, or 75 mm within 3 hours
Today's thunderstorms will likely be slow moving storms given a weak flow aloft, so heavy rainfall will be the main threat, although some storms could produce nickle to quarter size hail given the instability levels. Storms are expected to develop over western MB this afternoon ahead of the low pressure trough, and move into the Red River valley by evening before dissipating tonight. Stay tuned for updates and possible watches and warnings on today's weather..