Beach Hazards Statement 9, NWS Detroit, MI

112 
WHUS43 KDTX 240712
CFWDTX

Coastal Hazard Message
National Weather Service Detroit/Pontiac MI
312 AM EDT Mon Aug 24 2026

MIZ049-250000-
/O.EXT.KDTX.BH.S.0009.000000T0000Z-260825T0000Z/
Huron-
312 AM EDT Mon Aug 24 2026

...BEACH HAZARDS STATEMENT NOW IN EFFECT THROUGH THIS EVENING...

* WHAT...High swim risk due to large waves, rip currents, and
  longshore currents. 

* WHERE...Huron County shoreline.

* WHEN...Through this evening.

* IMPACTS...Strong currents can pull swimmers into deep water and
  prevent return to shore.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain out of the water to avoid hazardous swimming conditions.

&&

$$

Area Forecast Discussion
National Weather Service Detroit/Pontiac MI
1209 AM EDT Sun Aug 23 2026

.KEY MESSAGES...

- Breezy and cooler conditions arrive Sunday with scattered showers
through Sunday night.

- Mainly dry weather Monday into Tuesday with a warming trend. The
next chance of showers and storms is possible late in the day
Wednesday.

&&

.AVIATION...

A northwesterly wind and cold advection is supporting lingering
scattered showers and isolated thunderstorms activity moving across
southeast Michigan early tonight. This activity is now east of the
terminal corridor. Predominately VFR conditions exists within this
environment which should carry through most of the tonight with the
exception of possible MVFR conditions developing across PTK/FNT and
maybe up to MBS. Gusts to around 20 knots start around 14Z this
morning and last through much of the afternoon. Ceilings should
remain low VFR with a low probability for scattered showers and
possibly some isolated thunder during the afternoon.

D21/DTW Convection...Low potential for isolated thunderstorm focused
between 20Z and 00Z.

.DTW THRESHOLD PROBABILITIES...

* Low in thunderstorms this afternoon.

* Moderate in ceilings aob 5000 feet today.

&&

.PREV DISCUSSION...
Issued at 320 PM EDT Sat Aug 22 2026

DISCUSSION...

A cold front passing across the area remains the focus for numerous
showers and thunderstorms this afternoon. This is tied to an
amplifying upper trough inducing divergence aloft and deep forcing
along the frontal zone. This is enough forced ascent to produce high
coverage of convection, but instability remains a limiting factor to
the severe threat due to relatively cool surface temperatures and
slow diurnal recovery in the wake of morning convection and
persistent cloud cover. Radar trends over the past hour suggest the
forcing is likely outpacing the recovery of instability, indicating
a shrinking window for stronger to severe storms. Bulk wind shear of
30 kt remains the favorable parameter for some organized updrafts,
and will continue to monitor storm trends as the front works through
over the next couple hours. The main threat in any stronger
convection remains wind gusts of 40 to 60 mph. Portions of
Shiawassee, Livingston, and Washtenaw Counties received 2 to 3
inches of rain this morning, so these areas may also be susceptible
to localized ponding/flooding as the line of showers works through.
The surface front clears the area by around 6pm with weak
instability lagging behind to keep a spottier coverage of showers
and possibly a thunderstorm through this evening before forcing
clears out.

The trough driving the cold front will continue to amplify tonight
into Sunday with an anomalously deep closed low developing all the
way up to 300mb. Forecast ensemble mean 500mb heights sit about 2
standard deviations below climatology for this system, which stalls
just northeast of Georgian Bay into early next week. Its downstream
placement will direct a steady feed of drier, cool air into the
Great Lakes during this period, sending temperatures well below
normal. Highs in the 70s and lows in the 50s will be likely Sunday
and Monday. Northwest wind will be breezy to around 25 to 30 mph
each day.

A strong vort max will dive southward directly across the area
Sunday afternoon and evening, inducing higher lapse rates and a
diurnal flare-up of shower activity. Soundings show respectable
depth to narrow CAPE to allow for a chance of thunderstorms, but
severe weather is not expected. Highest coverage of showers is
favored target the Thumb where early season lake effect processes
begin to come into play. By Monday, precipitation chances drop off
and more sun is in store as gradual upper height rises commence.
Thicknesses rebound as well, allowing a slight uptick in high temps.

A shortwave ridge passes over the region Tuesday into early
Wednesday as the upper low slowly exits east and another shortwave
trough works across central Canada. The resultant high pressure
brings another dry day with a step up in high temps to around 80
degrees. Flow organizes out of the southwest on Wednesday as the
upstream wave works into the western Great Lakes. This advects in
higher moisture and a chance of showers and storms late in the day.
The associated cold front is slated to track through by Thursday
morning but additional showers will be possible through the rest of
the day as the trough stalls in the vicinity.

MARINE...

Ongoing passage of a cold front will continue to support a line of
showers and thunderstorms that will progress across the Great Lakes
for the remainder of the evening hours. Any stronger thunderstorms
will be capable of producing localized wind gusts aoa 34 knots. Wind
direction will quickly veer from south-southeast to northwest in the
wake of the front with cooler air supporting breezy conditions. A
prolonged window for these breezy conditions are expected through
tomorrow and a greater portion of the day on Monday, with gusts on
the order of 20 to 30 knots. A longer fused Small Craft Advisory
remains in effect for both wind gust concerns and for building wave
heights in and around the Thumb given the sustained northwest flow.
Otherwise, there will be a low chance for rain showers across Lake
Huron tomorrow afternoon and evening with a very low chance for
waterspout development. High pressure then builds in late Monday and
settles in on Tuesday, bringing lighter winds to the area.

&&

.DTX WATCHES/WARNINGS/ADVISORIES...
MI...None.
Lake Huron...Small Craft Advisory until 10 AM EDT Monday for LHZ421-441>443.

     Small Craft Advisory until 4 AM EDT Monday for LHZ422.

Lake St Clair...None.
Michigan waters of Lake Erie...None.
&&

AVIATION.....AA
DISCUSSION...TF
MARINE.......AM

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

Hazardous Weather Outlook
National Weather Service Detroit/Pontiac MI
418 AM EDT Sat Aug 22 2026

MIZ047>049-053>055-060>063-068>070-075-076-082-083-230830-
Midland-Bay-Huron-Saginaw-Tuscola-Sanilac-Shiawassee-Genesee-Lapeer-
St. Clair-Livingston-Oakland-Macomb-Washtenaw-Wayne-Lenawee-Monroe-
418 AM EDT Sat Aug 22 2026

This hazardous weather outlook is for southeast Michigan.

.DAY ONE...Today and Tonight

Showers and thunderstorms increase coverage today as a cold front
moves through the region. An isolated thunderstorm could approach
severe intensity during the afternoon with damaging wind near 60 mph
being the primary hazard. There is also a chance of small hail and
brief heavy rainfall as storms move west to east at 30 mph. A chance
of showers lingers this evening after the front exits into Ontario.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not currently planned today or tonight.

LCZ460-LEZ444-LHZ361>363-421-422-441>443-462>464-230830-
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-
418 AM EDT Sat Aug 22 2026

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

.DAY ONE...Today and Tonight

Showers and thunderstorms increase coverage today as a cold front
moves through the region. An isolated thunderstorm could approach
severe intensity during the afternoon with damaging wind near 50
knots being the primary hazard. There is also a chance of small hail
and brief heavy rainfall as storms move west to east at 25 knots. A
chance of showers lingers this evening after the front exits into
Ontario.

A Small Craft Advisory is in effect tonight for Saginaw Bay and
southern Lake Huron. Please see the latest marine forecast for
details.

.DAYS TWO THROUGH SEVEN...Sunday through Friday

A Small Craft Advisory is in effect Sunday through Monday morning for
Saginaw Bay and southern Lake Huron. Please see the latest marine
forecast for details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not currently planned today or tonight.

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

BT