Weather Archives - CMOS BULLETIN SCMO

Synoptic-scale weather patterns associated with extreme precipitation regimes during the eastern North American winter

Written on November 11, 2024.

– By Yeechian Low – Introduction and Motivation Figure 1: a): Map of eastern North America, depicted by the brown shading in the black box. b): Total precipitation (shaded, in mm)...

Particulate Matter: A Milton Case Study

Written on October 6, 2024.

Introduction Particulate matter (PM), including PM1, PM2.5, and PM10, represents a risk to human health at elevated levels. Xu et al. suggest that PM concentrations can vary greatly due to...

The Billion Dollar Calgary Hailstorm of 13 June 2020, Part III: Hail Size and Weather Modification Aspects

Written on September 18, 2024.

– By Paul Joe – Abstract On 13 June 2020, a hailstorm caused $1.2B of damage in a 10-15 km2 area in northeast Calgary within a 20 minute period. A radar-based overview of the storm’s...

The Billion Dollar Calgary Hailstorm of 13 June 2020, Part II: Explosive Growth, Merging and the Meso-Front

Written on September 18, 2024.

– By Paul Joe, Ronald E. Stewart, and Sudesh Boodoo – Abstract An overview of the Calgary billion dollar hailstorm of 13 June 2020 was previously presented. This extreme storm was...

The Billion Dollar Calgary Hailstorm of 13 June 2020, Part I: Overview

Written on September 18, 2024.

– By Paul Joe, Ronald E. Stewart, and Sudesh Boodoo – Abstract A radar analysis of the Calgary hailstorm of 13 June 2020 is presented. Insured damages in the City of Calgary were...

CMOS Congress Outstanding Presentations

Written on August 26, 2024.

On June 3-6, 2024, the 58th annual Canadian Meteorological and Oceanographic Society Congress was held virtually with help from the Winnipeg Centre and the BC Interior-Yukon Centre. The theme of...

Turning Your Passion into a Career

Written on February 5, 2024.

– By Francis Lavigne-Theriault – Fig. 1. Francis Lavigne-Thériault during a Manitoba blizzard in 2014, which brought –40 wind chills, strong winds and a lot of snow. To say that I have...

Minding the Weather – How Expert Forecasters Think

Written on January 5, 2024.

– Review by Patrick McCarthy – Figure 1. Meteorological Service of Canada weather office forecast desk. Photo by the author (Patrick McCarthy) Mission-critical systems often rely on...

The Great Smoke Pall of 1950 and Other “Dark Days” that have Blanketed Eastern North America

Written on September 24, 2023.

– By Kevin Hamilton – The extraordinary 2023 Canadian wildfire season has been in the public eye for much of this spring, but during June 7-8 the event entered a new phase of global...