Weather

Snow Squall Watch

Lake effect flurries are expected to develop this morning to the southeast of Lake Huron. Flurries will intensify to snow squalls this afternoon or this evening. Winds will become northerly overnight, shifting the snow squalls to regions south of Lake Huron. Local snow amounts of 5 to 10 cm are …

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Freezing Rain Warning

Ice build-up due to freezing rain is expected or occurring. Freezing rain and strong easterly winds expected. A Texas Low is expected to make its way towards the Great Lakes today. A warm front associated with this low will produce a band of freezing rain which is expected to impact …

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Winter Storm Watch

Winter storm beginning Monday afternoon. A storm from Texas will cause snow, ice pellets, and blowing snow to develop Monday afternoon then change to freezing rain Monday evening. Easterly winds will gust to 70 km/h. The freezing rain will persist several hours before changing to rain overnight. Poor travel conditions …

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Special Weather Statement

Gusty winds accompanying bands of showers and the odd thunderstorm this afternoon. The unseasonably mild December weather continues across the region. And summer-type showers and the odd thunderstorm are combining with the record-breaking temperatures to create locally strong gusty winds. Local southwesterly winds of 50 gusting to 80 km/h are …

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Fog Advisory

Fog is expected to redevelop over Southwestern Ontario for this evening and into Tuesday morning. Some areas will have near zero visibilities in dense fog beginning this evening. In addition, untreated roads could become icy as the temperature drops to near freezing overnight. Fog is expected to lift Tuesday morning …

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Fog Advisory

Near zero visiblity in fog is expected or occurring. Patchy fog has formed across much of Southwestern Ontario this morning as expected. Webcams and a trained Canwarn Spotter show patchy dense fog in a few localities, with visibility less than 250 metres. Areas of dense fog will persist until a …

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Heat Warning

Today and Monday are expected to be hot and humid. Daytime high temperatures are expected to be in the low thirties with maximum humidex values near forty. Overnight, temperatures are only expected to fall to about twenty or so. While extreme heat can put everyone at risk from heat illnesses, …

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Rainfall Warning

Rain, at times heavy, is expected. An unseasonably strong low pressure system over Ohio will bring a significant rainfall to the regions today and tonight as it tracks northeast just south of Lake Erie. The heaviest rain will move out of the Windsor and Sarnia areas by this evening, and …

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Severe Thunderstorm Watch

A cluster of thunderstorms is moving eastwards across southern lower Michigan and is expected to reach Southwestern Ontario around 4 or 5 pm EDT. A few of these thunderstorms may be capable of producing very strong wind gusts, as well as potentially large hail of 2 cm or more. This …

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Severe Thunderstorm Watch

St. Thomas – Aylmer – Eastern Elgin County Issued at 15:05 Sunday 14 June 2015 Thunderstorms associated with a frontal boundary are affecting southwestern Ontario this afternoon. The main threat with these thunderstorms are torrential downpours, but damaging winds are also a possibility. The threat should diminish this evening. Strong …

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Severe Thunderstorm Watch

Conditions are favourable for the development of severe thunderstorms that may be capable of producing strong wind gusts, large hail and heavy rain. Thunderstorms ahead of an approaching frontal trough will affect many portions of the regions this afternoon. Some of these storms could be severe. Strong wind gusts can …

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Severe Thunderstorm Watch

Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing strong wind gusts, large hail and torrential rain. Fast moving water across a road can sweep a vehicle away. Rapidly rising rivers and creeks can sweep away bridges, culverts, buildings, and people. Large hail can …

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Severe Thunderstorm Watch

Conditions are favourable for the development of dangerous thunderstorms that may be capable of producing damaging wind gusts, large hail and heavy rain. Thunderstorms are expected early this evening and persist through the evening hours. Very strong wind gusts can damage buildings, down trees and blow large vehicles off the …

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Frost Advisory

Some plants may be damaged or even destroyed by frost. A high pressure system now over the American Midwest is expected to move over Southern Ontario tonight. Clear skies and light winds are expected for tonight into early Thursday morning. As a result, frost will develop near midnight. The areas …

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Severe Thunderstorm Watch

Thunderstorms are spreading into southwestern Ontario ahead of a cold front. There is a potential for some of these thunderstorms to become severe this evening. The main threat will be damaging winds to 90 km/h. Some hail is also possible. The threat of severe thunderstorms will diminish later this evening. …

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Severe Thunderstorm Watch

Conditions are favourable for the development of severe thunderstorms that may be capable of producing heavy rain. Isolated thunderstorms will develop early this afternoon and continue into this evening. Heavy downpours are expected with these thunderstorms with rainfall amounts near 30 mm. The main concern is for regions that receive …

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Special Weather Statement for: St. Thomas – Aylmer – Eastern Elgin County

Strong and gusty winds possible later this afternoon and evening. A sharp and fast moving cold front will bring a sudden end to the warm air and sunshine being experienced across Southern Ontario today. This front will race into Southwestern Ontario this afternoon, and will reach the Golden Horseshoe area …

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Rainfall Warning for: St. Thomas – Aylmer – Eastern Elgin County

Periods of rain, at times heavy, are expected on Thursday. Some thunderstorm activity is also likely to be associated. Rainfall amounts will be variable, with average amounts in the 20 to 30 mm range. However 40 to 50 mm may be possible in some locales due to very heavy rainfall …

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Freezing Rain Warning for: St. Thomas – Aylmer – Eastern Elgin County

A developing low pressure area originating in Colorado is forecast to track across the central Great Lakes on Wednesday. Precipitation is expected to arrive in the form of freezing rain towards dawn early wednesday morning over extreme southwestern Ontario and spread northeastwards through the morning. The freezing rain will likely …

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Watershed Condition Statement for Residents of the Catfish Creek Watershed

This is a Flood Outlook, Watershed Conditions Statement The recent above zero day time temperatures have readied the existing snowpack for certain snow melt. Weather forecasts are calling for warmer weekend temperatures which will further season the snow for additional melt, cooler overnight temperatures will moderate and subsequently mitigate a …

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