Flash Flood Warning 8, NWS Detroit, MI

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Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
406 PM EDT Wed Jul 30 2025

MIZ049-055-063-312015-
Huron-Sanilac-St. Clair-
406 PM EDT Wed Jul 30 2025

This hazardous weather outlook is for southeast Michigan.

.DAY ONE...This Afternoon and Tonight

There is a chance of a few thunderstorms this evening into tonight
mainly near and south of St. Clair County. Severe weather is not
anticipated. Storm motion will be west to east at 30 mph.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

A Beach Hazards Statement is in effect Thursday. Refer to the latest
headline and surf zone forecast for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

MIZ047-048-053-054-060>062-068>070-075-076-082-083-312015-
Midland-Bay-Saginaw-Tuscola-Shiawassee-Genesee-Lapeer-Livingston-
Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
406 PM EDT Wed Jul 30 2025

This hazardous weather outlook is for southeast Michigan.

.DAY ONE...This Afternoon and Tonight

There is a chance of a few thunderstorms this evening into tonight
mainly south of M-59 as a disturbance approaches from the west.
Isolated storms may be severe with damaging winds the primary threat.
Storm motion will be west to east at 30 mph.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

There is a low chance of non-severe thunderstorms Thursday morning,
mainly south of the I-94 corridor. The chances will be the result of
an elevated frontal boundary overhead.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today and tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-312015-
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 PM EDT Wed Jul 30 2025

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

.DAY ONE...This Afternoon and Tonight

There is a chance of a few thunderstorms this evening into tonight
over the southern Great Lakes as a disturbance approaches from the
west. Isolated storms may be severe with wind gusts in excess of 40
kt the primary threat. Storm motion will be west to east at 25 kt.

Small Craft Advisories are in effect tonight for all nearshore
waters except Lake St Clair. See latest marine weather message for
more information.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday

There is a low chance of non-severe thunderstorms Thursday morning
over Lake Erie.

Small Craft Advisories are in effect Thursday for all nearshore
waters except Lake St Clair. See latest marine weather message for
more information.

.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.

TF

Preliminary Local Storm Report
National Weather Service Detroit/Pontiac MI
549 PM EDT Wed Jul 30 2025

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0547 PM     Rain             1 S Ypsilanti           42.22N  83.62W
07/30/2025  M1.05 inch       Washtenaw          MI   Trained Spotter

            20 minute rainfall total.

&&

Event Number DTX2500757

TF

Special Weather Statement
National Weather Service Detroit/Pontiac MI
554 PM EDT Wed Jul 30 2025

MIZ075-302230-
Washtenaw MI-
554 PM EDT Wed Jul 30 2025

...A STRONG THUNDERSTORM WILL IMPACT EASTERN WASHTENAW COUNTY THROUGH
630 PM EDT...

At 553 PM EDT, Doppler radar was tracking a strong thunderstorm over
Ypsilanti, moving north at 10 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Ann Arbor, Ypsilanti, Salem, Dixboro, Barton Hills, and Pittsfield
Township.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4222 8374 4237 8380 4243 8355 4218 8354
      4215 8369
TIME...MOT...LOC 2153Z 168DEG 11KT 4228 8365

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

KGK

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