These are perfect weather conditions for an anticipated display!

Almost perfect, given that periods of smoke accumulation, as noted above, did occur due to the light winds present!

For Saturday, August 3rd, an upper-level trough to the NW will generate scattered showers and partly cloudy skies across S. Quebec, along with unseasonably cool temperatures. Maximum temperatures for the day should attain 21-22 C, and late-evening values should drop slightly to 19-20 C in the metropolitan area (cooler outside the city). Humidity levels are moderate throughout the day (becoming borderline low-moderate for the evening), but temperatures are low enough that a humidex will not be significant. Precipitation should gradually subside by the late-afternoon, leaving partly cloudy skies for the evening period.

Winds will be largely breezy for the afternoon at 19-23 km/h, with occasional gusts of 28-32 km/h, producing a slight chill in the air. Directional tendencies are mostly in the form of West-Southwesterlies. By evening, wind speeds should decrease to light standards at 10-13 km/h, and more from the SW. As a result, the smoke should be moving fairly quickly towards right hand sections of the La Ronde audience. Wind speeds should still be high enough to produce a slight chill. There is some divergence amongst models with evening wind direction (i.e. SW vs. SSW), though, so this will need to be monitored in the newer runs. However, there is agreement as to the lighter winds in time for the evening period.

Unfortunately, it will likely not feel Summer-like for much of the first week of August, since the aforementioned upper-level trough has been projected to be persistent over much of E. Canada during this time. A nice warming, however, could occur for the 7th and 8th.

Another update to follow.

Trav.

Weather conditions remain generally similar to what had been specified in the previous posting. However, some modifications are necessary with respect to precipitation and, to some extent, wind patterns. As such, here are the dominant patterns for today (August 3rd) for the Montreal area, and for the final display of 2013.

Temperature/Humidity

Temperatures will be unseasonably cool for today, with maximum temperatures of 22-23 C, along with moderate humidity. By the late-evening period, temperatures will drop to about 20-21 C in the metropolitan area, along with continued moderate humidity. Because temperatures are generally low enough, the humidex is not significant.

Precipitation

As mentioned previously, a persistent upper-level trough will continue to produce scattered convective activity, in the form of scattered showers and non-severe thunderstorms, for the afternoon period. Precipitation development could continue into the early-evening time frame due to some lift and low instability present, though coverage should become more sparse (30% P.O.P.) and mostly subside by late-evening. Partly cloudy skies should be present throughout the evening.

Wind

Winds will be gusty for the afternoon at 20-24 km/h, with occasional gusts of 29-33 km/h. Directional tendencies are projected to be in the form of West-Northwesterlies (occasionally from the WSW) by the mid-afternoon hours and becoming more Westerly for the evening period (a change from the SW specified previously). Wind speeds for the late-evening period should decline but remain somewhat breezy at 12-16 km/h (occasional gusts of 23-26 km/h, mostly for early in the evening), producing a chill in the air. As such, the smoke should be moving quickly towards the audience at La Ronde directly, with some occasional tendency towards right-hand sections.

That’s the way the weather should work. In summary, a breezy evening, with somewhat cool temperatures, partly cloudy skies, and a risk for isolated showers early in the evening.

And so concludes the weather reports for Summer 2013!

Trav.

As such, the smoke should be moving quickly towards the audience at La Ronde directly, with some occasional tendency towards right-hand sections.

Thank you for this very relevant update, especially for that special evening.

Furthermore, I also want to acknowledge your outstanding contribution to this forum, once again this year, with useful, specific, and accurate weather forecast. I really appreciated and hope to benefit of your expertise next year!

Fred

Thank you very, very much, Fred! It is always a pleasure, and I am pleased to know that the weather forecasts were useful!

Trav.