Tuesday, April 14, 2015
Warm and windy Wednesday.. Burn ban in effect
A low pressure system tracking into southern Saskatchewan will bring a strengthening southerly wind across southern MB Wednesday , especially through Winnipeg and the Red River valley. Southerly winds will increase to 40 or 50 km/h by mid morning with gusts to 70 or possibly 80 km/h by midday into the afternoon. The windy conditions will be accompanied by warm temperatures in the low 20s, and very low humidities of 15 to 20% leading to dangerous fire weather conditions. Local grass or brush fires are possible, and a burning ban is in effect for much of southern and eastern MB. The strong winds may also lead to areas of blowing dust as dry topsoil gets blown around by the gusty winds. Once winter snow cover is gone, April becomes a prime month for grass fires and blowing dust in the Prairies as strong gusty winds can combine with dry surface conditions to help promote fires and drifting topsoil. Increasing dewpoints, surface moisture, rainfall, and leaf/crop green-up in May and June help to reduce the threat of grass fires and blowing dust as the growing season progresses. However, grass fires can also flare up in the fall.. particularly in October at the end of the growing season and before the first snows of winter.
Posted by rob at 10:06 PM