Friday 25 August 2023

This Day in Weather History - August 25

 August 25, 1960 Colorado Low Heavy rain, Strong Winds and Cold


NOAA weather map showing the Colorado Low in southern Manitoba Aug 25, 1960 at 1pm

A Colorado or Wyoming Low brought heavy rains, strong winds and cold temperatures to southern Manitoba on August 25, 1960. The rain began early in the morning and fell steadily all day before ending overnight. The heaviest rain fell in portions of the Red River Valley and the Interlake with a general 30 to 50 mm. Higher amounts up to 68.8 mm were recorded along the western shores of Lake Winnipeg around Gimli. Lesser amounts of 5 to 15 mm in southwestern Manitoba. 41.1 mm fell at Winnipeg Airport, a daily rainfall record which still stands as of today in 2023. 

Rainfall amounts from ECCC:

Gimli Airport 68.8 mm
Petersfield 53.3 mm
Indian Bay 48.0 mm
Stonewall 46.0 mm
Winnipeg Charleswood 43.4 mm
Arborg 43.2 mm
Winnipeg Sherbrook St 42.3 mm
Winnipeg Airport 41.1 mm
Beausejour 39.4 mm
Steinbach 36.8 mm
Pine Falls 35.1 mm
Emerson 33.0 mm
Great Falls 26.4 mm
Morden 21.3 mm
Portage la Praire 17.8 mm
Brandon Airport 8.6 mm

Strong northerly winds and cold temperatures accompanied the rain, making it feel more like October than August. Wind gusts up to 84 km/h were recorded at Winnipeg Airport and 90 km/h at Gimli Airport. The wind took down some power and telephone lines, causing outages around Winnipeg and the shores of Lake Winnipeg. Power was out for about nine hours around Gimli and Winnipeg Beach. Several small boats were swept from their moorings on Winnipeg Beach as well by the wind and waves. Some branches were ripped down by the winds as well. 

From the Brandon Sun Aug 26, 1960 page 15

The daily high of 18°C at Winnipeg Airport was achieved at midnight on the 25th. Temperatures hovered around 13 or 14°C during the rainfall event from the morning to the evening. 

The province reported that the rain was helpful for beet crops. The rain also reduced the fire risk across southeastern Manitoba. About 17,287 people braved the elements to watch the Blue Bombers football game against the Edmonton Eskimos. 

From the Winnipeg Tribune, Aug 26, 1960, page 1


This post contains information from the Brandon Sun, Winnipeg Free Press, Winnipeg Tribune, NOAA and ECCC. 

No comments:

Post a Comment