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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
406 AM EDT Fri Jul 21 2017

St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
406 AM EDT Fri Jul 21 2017

This hazardous weather outlook is for portions of southeast

.DAY ONE...Today and Tonight

There is a chance of thunderstorms late tonight. A few of these
storms may be severe and produce wind gusts to 60 mph and large hail
to one inch in diameter. Storm motion will be east at 30 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

There is a continued chance of thunderstorms on Saturday and Sunday
with the best chance on Saturday morning. There is a slight chance of
severe weather on Saturday and a marginal risk of severe weather on
Sunday. The main hazards will be damaging wind gusts to 60 mph and
large hail to one inch in diameter. Very heavy rainfall will also be
possible, mainly on Saturday. This could lead to localized flooding.


Spotter activation will not be needed today and tonight.


Air Quality Alert

St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
Including the cities of Port Huron, Howell, Pontiac, Warren,
Ann Arbor, Detroit, Adrian, and Monroe
102 PM EDT Thu Jul 20 2017

...Air Quality Alert in effect for Friday July 21th...

The Michigan Department of Environmental Quality has declared
Friday July 21th to be an action day for elevated levels of ozone.
Pollutants are expected to be in the unhealthy for sensitive groups

The action day is in effect for the following Michigan counties...

St. Clair...Livingston...Oakland...Macomb...Washtenaw...Wayne...
Lenawee and Monroe.

People and businesses are urged to avoid activities which lead to
ozone formation. These activities include...refueling vehicles or
topping off when refueling, using gasoline powered lawn equipment
and using charcoal lighter fluid. Positive activities
pooling, biking to work, delaying or combining errands and using
water based paints.

It is recommended that active children and adults, and people with
respiratory diseases such as asthma, limit prolonged outdoor

For further information, please see the Michigan Department of
Environmental Quality page at



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