West Michigan Clean Air Coalition

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4/13/2020 Forecast Update

FORECAST SUMMARY:

Monday, April 13th, 2020 through Monday, April 20th, 2020

PM-2.5: 24-hour Fine Particulate concentrations should be mostly Good through Thursday with Moderates possible later in the forecast period.

FORECAST DISCUSSION:

A strong storm system moving through the Great Lakes region is producing strong winds statewide and snow accumulations across parts of the Upper Peninsula. Winds will be the most influential part of the storm further south with temperatures dropping during the day. Strong northwesterly winds will keep fine particulate in the Good range.

Looking into the week, conditions should be generally dry and only small chance for precipitation exists Tuesday and Wednesday. Cool air will be in place with temperatures averaging below normal during the work week. A northerly component to the wind both at the surface and upper levels should keep fine particulate Good through Thursday. Lighter winds are anticipated Friday as a storm system passes south through the Ohio Valley. Fine particulate may reach low-end Moderate, mainly across the southern portion of the state.

EXTENDED FORECAST:

Extended forecast models show temperatures moderating for the weekend. High pressure settles in Saturday but a storm system passing across the northern Great Lakes brings precipitation in the forecast early next week. Fine particulate will range from middle Good to low Moderate during this period.

Forecast updated by Stephanie M. Hengesbach: Monday, April 13th, 2020
Next forecast update: Monday, April 20th, 2020