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Hurricane Isaias 2020

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Satellite images and tracking maps of Category 1 Hurricane Isaias 2020, July 23 - August 5. Max wind speed 85mph.

Surface observations indicate that Isaias continues to gradually weaken over southeastern Quebec. There have been a couple of observing sites with marine exposure along the St. Lawrence River that have reported winds of around 35 knots within the past few hours. Therefore, the initial intensity is set at that value for this advisory. The post-tropical cyclone should continue to weaken today (August 5), and the system is expected to be absorbed by a larger extratropical low over eastern Canada on Thursday.

The cyclone has begun to decelerate and is now moving 015/24 knots. The post-tropical cyclone should continue on a general north-northeastward motion with an additional decrease in forward speed over the next 12-24 hours. The updated NHC track forecast is similar to previous advisory and is near the middle of the tightly clustered dynamical model guidance.

This is the last NHC advisory on Isaias. Additional information on the post-tropical cyclone can be found in products issued by the Canadian Hurricane Center at: https://weather.gc.ca/hurricane/index_e.html

Information provided by NHC.

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