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Air Quality Alert


MIZ063-068>070-075-076-082-083-220400-
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
range.

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 include...car
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
exertion.

For further information, please see the Michigan Department of
Environmental Quality page at http://www.deqmiair.org

$$

SF


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Wilmington OH
445 AM EDT Fri Jul 21 2017

INZ050-058-059-066-OHZ026-034-035-042>046-051>056-060>065-070>074-
220900-
Wayne-Fayette IN-Union IN-Franklin IN-Hardin-Mercer-Auglaize-Darke-
Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark-Madison-
Franklin OH-Licking-Preble-Montgomery-Greene-Fayette OH-Pickaway-
Fairfield-Butler-Warren-Clinton-Ross-Hocking-
445 AM EDT Fri Jul 21 2017

This Hazardous Weather Outlook is for East Central Indiana,
Southeast Indiana, Central Ohio, Southwest Ohio and West Central
Ohio.

.DAY ONE...Today and Tonight.

A warm and humid airmass will be in place today with heat index
values in the middle to upper 90s.

Thunderstorms will be possible today. Although isolated damaging
winds cannot be ruled out, the main threat will be heavy rainfall.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Heat index values in the mid to upper 90s will again be possible Saturday
afternoon.

Occasional thunderstorms can also be expected through the weekend.
Some storms may become severe with the main severe threats being
damaging winds and heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be required this weekend.

$$

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

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-220815-
Lake St Clair-
Michigan Waters of Lake Erie from Detroit River to North Cape MI-
Lake Huron from 5NM east of Mackinac Bridge to Presque Isle Lt
beyond 5 NM off shore-
Lake Huron from Presque Isle Light to Sturgeon Point MI beyond 5NM
off shore-
Lake Huron from Sturgeon Point to Alabaster MI beyond 5NM off shore-
Outer Saginaw Bay SW of Alabaster to Port Austin MI to Inner Saginaw
Bay-Inner Saginaw Bay SW of Point Au Gres to Bay Port MI-
Port Austin to Harbor Beach MI-Harbor Beach to Port Sanilac MI-
Port Sanilac to Port Huron MI-
Lake Huron from Port Austin to Harbor Beach beyond 5NM Off Shore-
Lake Huron from Harbor Beach to Port Sanilac beyond 5NM Off Shore-
Lake Huron from Port Sanilac to Port Huron beyond 5NM Off Shore-
406 AM EDT Fri Jul 21 2017

This hazardous weather outlook is for portions of Lake Erie, Lake
Huron and Lake St Clair.

.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 50 knots and large
hail to one inch in diameter. Storm motion will be east at 30 knots.

.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 50 knots and
large hail to one inch in diameter. The greatest chance of storms
will exist from southern Lake Huron southward.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$

You can obtain your latest National Weather Service forecasts online
at www.weather.gov/detroit.

DG

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

MIZ047>049-053>055-060>063-068>070-075-076-082-083-220815-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
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
Michigan.

.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 INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

$$

Hazardous Weather Outlook
National Weather Service Cleveland OH
350 PM EDT Thu Jul 20 2017

LEZ061-142>149-162>169-OHZ003-006>014-017>023-027>033-036>038-047-
089-PAZ001>003-212000-
Lake Erie open waters from Ripley to Buffalo NY-
Lake Erie nearshore waters from Maumee Bay to Reno Beach OH-
Lake Erie nearshore waters from Reno Beach to The Islands OH-
Lake Erie nearshore waters from The Islands to Vermilion OH-
Lake Erie nearshore waters from Vermilion to Avon Point OH-
Lake Erie nearshore waters from Avon Point to Willowick OH-
Lake Erie nearshore waters from Willowick to Geneva-on-the Lake OH-
Lake Erie nearshore waters from Geneva-on-the-Lake to Conneaut OH-
Lake Erie nearshore waters from Conneaut OH to Ripley NY-
Lake Erie open waters from Maumee Bay to Reno Beach OH-
Lake Erie open waters from Reno Beach to The Islands OH-
Lake Erie open waters from The Islands to Vermilion OH-
Lake Erie open waters from Vermilion to Avon Point OH-
Lake Erie open waters from Avon Point to Willowick OH-
Lake Erie open waters from Willowick to Geneva-on-the-Lake OH-
Lake Erie open waters from Geneva-on-the-Lake to Conneaut OH-
Lake Erie open waters from Conneaut OH to Ripley NY-Lucas-Wood-
Ottawa-Sandusky-Erie-Lorain-Cuyahoga-Lake-Geauga-Ashtabula Inland-
Hancock-Seneca-Huron-Medina-Summit-Portage-Trumbull-Wyandot-Crawford-
Richland-Ashland-Wayne-Stark-Mahoning-Marion-Morrow-Holmes-Knox-
Ashtabula Lakeshore-Northern Erie-Southern Erie-
350 PM EDT Thu Jul 20 2017

This Hazardous Weather Outlook is for Lake Erie, north central
Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania.

.DAY ONE...Tonight.

No hazardous weather is expected tonight.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

A front will remain across the area Friday and Saturday and will
continue to be the focus for thunderstorm development. There remains
a slight chance that storms could become severe each day with
damaging winds and hail the main threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

$$

Hazardous Weather Outlook...UPDATED
National Weather Service Northern Indiana
126 PM EDT Thu Jul 20 2017

INZ003>009-012-014-016>018-MIZ077>081-OHZ001-002-004-005-015-016-024-
025-211730-
La Porte-St. Joseph IN-Elkhart-Lagrange-Steuben-Noble-De Kalb-Starke-
Marshall-Kosciusko-Whitley-Allen IN-Berrien-Cass MI-St. Joseph MI-
Branch-Hillsdale-Williams-Fulton OH-Defiance-Henry-Paulding-Putnam-
Van Wert-Allen OH-
126 PM EDT Thu Jul 20 2017 /1226 PM CDT Thu Jul 20 2017/

This hazardous weather outlook is for portions of southwest
Michigan...northern Indiana and northwest Ohio.

.DAY ONE...This afternoon and Tonight

It will be hot and humid this afternoon with heat indices into the
low to mid 90s.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

Multiple rounds of thunderstorms are possible Friday afternoon
through Sunday. Strong thunderstorms and isolated severe weather
along with heavy rainfall remain possible during this period with the
best chances focused on Friday night and Saturday morning. Flooding
will be possible during this period as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

&&

Stay tuned to NOAA Weather Radio for further details or updates...or
check our web site at weather.gov/iwx

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
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