The National Weather Service in Detroit forecasts a moderate risk of severe weather for the Ann Arbor and Detroit area as well as for the rest of southern Michigan for Sunday afternoon, November 17, 2013. The risk is of high winds with a chance of tornadoes. Winds will be from the south at about 25 mph with gusts of up to 70 mph.
UPDATED 12:45 p.m. EST: Tornado watch (Particularly Dangerous Sitation) WW 562
UPDATED 11:15 a.m. EST: Mesoscale discussion map for MD 2011.
SUMMARY...SIGNIFICANT TORNADO/WIND HAZARDS WILL INCREASE RAPIDLY MIDDAY INTO AFTERNOON WITH A DOWNSTREAM TORNADO WATCH ISSUANCE EXPECTED E OF WW 561.
UPDATED: Map with tornado, severe wind, rainfall, and hail threats for the area, from an NWS Grand Rapids briefing on Sunday.
UPDATED: Map as of Saturday evening for Sunday.
The weather briefing for November 16 (PDF) includes this slide showing the weather map for the area with predictions of severity for Sunday. The worst of the storm is expected to be between 2:00 p.m. and 10:00 p.m.
What do you tune in during severe weather? Twitter's #miwx hashtag is useful, as is the amateur radio SKYWARN service which in Ann Arbor and Washtenaw County uses the N8DUY repeater on 145.15. If you don't have a ham radio, you can tune in to that repeater via Broadcastify.
Of course, no storm would be complete without a watch for power outages. My big list of power outage maps can be helpful; you will want to be watchful for DTE Energy,Consumers Energy, and Indiana Michigan Power outage maps in southern Michigan.