Tornado watch issued including Ann Arbor until 8pm

Update: as of 5:33pm this tornado watch has been cancelled.



A tornado watch has been issued for our area, effective immediately until 8pm.

This means that the storms moving into the area this afternoon will provide conditions ideal for the formation of tornados.

You should continue monitoring local media for any severe storm or tornado warnings. (Here’s a list of Washtenaw County’s emergency broadcasters.)

And you should prepare by reviewing these tornado safety tips.

Thunderstorms expected as cold front moves through; severe storms are possible

Update 5:37pm: heavy cloud cover helped prevent this system from developing severe storms in Ann Arbor. The city will see light rain on and off into the evening.

As a cold front moves through southern Michigan this afternoon into the evening, we will see rain and many thunderstorms scattered across the region.

Some of these storms will be strong, and the National Weather Service has rated our area at an “enhanced” risk of severe storms for today. Image follows.

(That’s right in the middle of the scale: it goes “none”, “marginal”, “slight”, “enhanced”, “moderate”, “high”.)

Day 1 Categorical Outlook May 11


Along with these storms, we can expect strong winds and localized heavy rainfall. Damaging hail is possible. There is a very small chance of tornados predicted with today’s storms.

The outlook for damaging winds today:


The thunderstorm outlook for today shows a high potential for storms from 4-8pm:


Update: these following thunderstorm outlooks became outdated while this post was being written. Finally, the thunderstorm outlooks for noon-4pm and then 4-8pm follow, indicating late afternoon is when we’re likely to see the stronger storms: