Alert archive / Michigan / Beach Hazards Statements in 2018

Beach Hazards Statement 11, NWS Grand Rapids, MI

August 20, 20186 counties in Michigan

NWS Grand Rapids, MI issued this beach hazards statement at Aug 20, 2018, 4:19 AM EDT for 6 counties in Michigan. It took effect at Aug 21, 2018, 11:00 AM EDT. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued
Aug 20, 2018, 4:19 AM EDT (08:19 UTC)
In effect from
Aug 21, 2018, 11:00 AM EDT
Expired
Aug 22, 2018, 3:51 PM EDT
In force
29 hr
Issued by
NWS Grand Rapids, MI

Counties Allegan County, MI, Mason County, MI, Muskegon County, MI, Oceana County, MI, Ottawa County, MI, Van Buren County, MI

The radar

The Grand Rapids radar (KGRR), 60 km from the middle of the area, began a volume at 08:23 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 8.3 hours before the alert went out and 214 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Green Bay/Straub, WI at 00:00Z on 2018-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 00:00Z on 2018-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1508 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
-27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

848 
WHUS43 KGRR 200819
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
419 AM EDT Mon Aug 20 2018

MIZ037-043-050-201630-
/O.NEW.KGRR.BH.S.0011.180821T1500Z-180822T1800Z/
Mason-Oceana-Muskegon-
419 AM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT IN EFFECT FROM TUESDAY MORNING THROUGH
WEDNESDAY AFTERNOON...

The National Weather Service in Grand Rapids has issued a Beach
Hazards Statement...which is in effect from Tuesday morning
through Wednesday afternoon. 

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED.

* STRONG STRUCTURAL CURRENTS EXPECTED. 

* STRONG LONGSHORE CURRENTS EXPECTED. 

* RIP CURRENTS POSSIBLE. 

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

  Muskegon State Park... 
  Mears State Park in Pentwater... 
  Stearns Park in Ludington. 

* OVERVIEW/POTENTIAL IMPACTS...North winds will increase rapidly
  around midday Tuesday into the 20 to 30 mph range. Wind gusts to
  around 35 mph will be possible. Waves will build into the 4 to 7
  foot range Tuesday afternoon. Waves should peak in the 6 to 10
  foot range Tuesday evening. Dangerous swimming conditions will
  develop quickly Tuesday afternoon, with north sides of north
  piers being particularly dangerous places to swim. Waves of 
  this magnitude are not seen very often in the summer swim 
  season, caution is advised. In addition, waves will top pier 
  structures and sweep completely across them. Steer clear of the 
  pier and stay dry when waves are high!

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly. 

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-201630-
/O.NEW.KGRR.BH.S.0011.180821T1800Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
419 AM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT IN EFFECT FROM TUESDAY AFTERNOON
THROUGH WEDNESDAY EVENING...

The National Weather Service in Grand Rapids has issued a Beach
Hazards Statement...which is in effect from Tuesday afternoon
through Wednesday evening. 

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED.

* STRONG STRUCTURAL CURRENTS EXPECTED. 

* STRONG LONGSHORE CURRENTS EXPECTED. 

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven. 

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE... 

  North Beach in South Haven... 
  Holland State Park... 
 

* OVERVIEW/POTENTIAL IMPACTS...North winds will increase rapidly
  Tuesday afternoon into the 20 to 30 mph range. Wind gusts to
  around 35 mph will be possible. Waves will build into the 4 to 7
  foot range Tuesday afternoon. Waves should peak in the 6 to 10
  foot range Tuesday evening. Dangerous swimming conditions will
  develop quickly Tuesday afternoon, with north sides of north
  piers being particularly dangerous places to swim. Waves of 
  this magnitude are not seen very often in the summer swim 
  season, caution is advised. In addition, waves will top pier 
  structures and sweep completely across them. Steer clear of the 
  pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly. 

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

WEATHER.GOV/GRR

DUKE
11 follow-up statements
339 
WHUS43 KGRR 201441
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
1041 AM EDT Mon Aug 20 2018

MIZ037-043-050-202245-
/O.CON.KGRR.BH.S.0011.180821T1500Z-180822T1800Z/
Mason-Oceana-Muskegon-
1041 AM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY MORNING
THROUGH WEDNESDAY AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

 Muskegon State Park...   Mears State Park in Pentwater...  
Stearns Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 5 feet
  Tuesday afternoon and peak in the 6 to 10 foot range Tuesday
  evening. Dangerous swimming conditions will develop quickly
  Tuesday afternoon, with north sides of north piers being
  particularly dangerous places to swim. Waves of this magnitude
  are not seen very often in the summer swim season. Caution is
  advised. Waves will top pier structures and sweep completely 
  across them. Steer clear of the pier and stay dry when waves are
  high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-202245-
/O.CON.KGRR.BH.S.0011.180821T1800Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
1041 AM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY
AFTERNOON THROUGH WEDNESDAY EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

 North Beach in South Haven...   Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 6 feet
  Tuesday afternoon and peak near 10 feet Tuesday evening. 
  Dangerous swimming conditions will develop quickly Tuesday 
  afternoon, with north sides of north piers being particularly 
  dangerous places to swim. Waves of this magnitude are not seen 
  very often in the summer swim season. Caution is advised. Waves 
  will top pier structures and sweep completely across them. Steer
  clear of the pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
940 
WHUS43 KGRR 201945
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
345 PM EDT Mon Aug 20 2018

MIZ037-043-050-210345-
/O.CON.KGRR.BH.S.0011.180821T1500Z-180822T1800Z/
Mason-Oceana-Muskegon-
345 PM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY MORNING
THROUGH WEDNESDAY AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

Muskegon State Park...   Mears State Park in Pentwater...
Stearns Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 5 feet
  Tuesday afternoon and peak in the 6 to 8 foot range Tuesday 
  evening. Dangerous swimming conditions will develop quickly 
  Tuesday afternoon, with north sides of north piers being 
  particularly dangerous places to swim. Waves of this magnitude 
  are not seen very often in the summer swim season. Caution is 
  advised. Waves will top pier structures and sweep completely 
  across them. Steer clear of the pier and stay dry when waves are
  high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-210345-
/O.CON.KGRR.BH.S.0011.180821T1800Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
345 PM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY
AFTERNOON THROUGH WEDNESDAY EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...   Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 6 feet 
  Tuesday afternoon and peak near 10 feet Tuesday evening. 
  Dangerous swimming conditions will develop quickly Tuesday 
  afternoon, with north sides of north piers being particularly 
  dangerous places to swim. Waves of this magnitude are not seen 
  very often in the summer swim season. Caution is advised. 
  Waves will top pier structures and sweep completely across 
  them. Steer clear of the pier and stay dry when waves are 
  high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
331 
WHUS43 KGRR 210212
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
1012 PM EDT Mon Aug 20 2018

MIZ037-043-050-211015-
/O.CON.KGRR.BH.S.0011.180821T1500Z-180822T1800Z/
Mason-Oceana-Muskegon-
1012 PM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY MORNING
THROUGH WEDNESDAY AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

Muskegon State Park...Mears State Park in Pentwater... Stearns 
Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 5 feet 
  Tuesday afternoon and peak in the 6 to 8 foot range Tuesday 
  evening. Dangerous swimming conditions will develop quickly 
  Tuesday afternoon, with north sides of north piers being 
  particularly dangerous places to swim. Waves of this magnitude 
  are not seen very often in the summer swim season. Caution is 
  advised. Waves will top pier structures and sweep completely 
  across them. Steer clear of the pier and stay dry when waves 
  are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-211015-
/O.CON.KGRR.BH.S.0011.180821T1800Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
1012 PM EDT Mon Aug 20 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM TUESDAY
AFTERNOON THROUGH WEDNESDAY EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 6 feet 
  Tuesday afternoon and peak near 10 feet Tuesday evening. 
  Dangerous swimming conditions will develop quickly Tuesday 
  afternoon, with north sides of north piers being particularly 
  dangerous places to swim. Waves of this magnitude are not seen 
  very often in the summer swim season. Caution is advised. 
  Waves will top pier structures and sweep completely across 
  them. Steer clear of the pier and stay dry when waves are 
  high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
164 
WHUS43 KGRR 210819
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
419 AM EDT Tue Aug 21 2018

MIZ037-043-050-211630-
/O.CON.KGRR.BH.S.0011.180821T1500Z-180822T1800Z/
Mason-Oceana-Muskegon-
419 AM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 11 AM EDT THIS
MORNING THROUGH WEDNESDAY AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

  Muskegon State Park...
  Mears State Park in Pentwater... 
  Stearns Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves will build to over 5 feet 
  Tuesday afternoon and peak in the 6 to 9 foot range Tuesday 
  evening. Dangerous swimming conditions will develop quickly 
  Tuesday afternoon, with north sides of north piers being 
  particularly dangerous places to swim. Waves of this magnitude 
  are not seen very often in the summer swim season. Caution is 
  advised. Waves will top pier structures and sweep completely 
  across them. Steer clear of the pier and stay dry when waves 
  are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-211630-
/O.CON.KGRR.BH.S.0011.180821T1800Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
419 AM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT FROM 2 PM EDT THIS
AFTERNOON THROUGH WEDNESDAY EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

  North Beach in South Haven...
  Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 6 feet
  Tuesday evening and peak between 6 and 10 feet Tuesday night. 
  Dangerous swimming conditions will develop quickly Tuesday 
  afternoon, with north sides of north piers being particularly 
  dangerous places to swim. Waves of this magnitude are not seen 
  very often in the summer swim season. Caution is advised. Waves 
  will top pier structures and sweep completely across them. Steer
  clear of the pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

WEATHER.GOV/GRR
742 
WHUS43 KGRR 211516
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
1116 AM EDT Tue Aug 21 2018

MIZ037-043-050-212330-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180822T1800Z/
Mason-Oceana-Muskegon-
1116 AM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

 Muskegon State Park...   Mears State Park in Pentwater...  
Stearns Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves will build to over 5 feet
  this afternoon and peak in the 6 to 9 foot range this evening.
  Dangerous swimming conditions will develop quickly this 
  afternoon, with north sides of north piers being particularly 
  dangerous places to swim. Waves of this magnitude are not seen 
  very often in the summer swim season. Caution is advised. Waves 
  will top pier structures and sweep completely across them. Steer
  clear of the pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-212330-
/O.CON.KGRR.BH.S.0011.180821T1800Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
1116 AM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

 North Beach in South Haven...   Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 6 feet this
  evening and peak between 6 and 10 feet tonight. Dangerous
  swimming conditions will develop quickly this afternoon, with 
  north sides of north piers being particularly dangerous places 
  to swim. Waves of this magnitude are not seen very often in the 
  summer swim season. Caution is advised. Waves will top pier 
  structures and sweep completely across them. Steer clear of the 
  pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
001 
WHUS43 KGRR 211951
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
351 PM EDT Tue Aug 21 2018

MIZ037-043-050-220400-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180822T1800Z/
Mason-Oceana-Muskegon-
351 PM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

Muskegon State Park...Mears State Park in Pentwater... Stearns 
Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves will build to over 5 feet 
  this afternoon and peak in the 6 to 9 foot range this evening. 
  Dangerous swimming conditions will develop quickly this 
  afternoon, with north sides of north piers being particularly 
  dangerous places to swim. Waves of this magnitude are not seen 
  very often in the summer swim season. Caution is advised. 
  Waves will top pier structures and sweep completely across 
  them. Steer clear of the pier and stay dry when waves are 
  high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-220400-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
351 PM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves will build over 6 feet this
  evening and peak between 6 and 9 feet tonight. Dangerous 
  swimming conditions will develop quickly this afternoon, with 
  north sides of north piers being particularly dangerous places 
  to swim. Waves of this magnitude are not seen very often in the 
  summer swim season. Caution is advised. Waves will top pier 
  structures and sweep completely across them. Steer clear of the 
  pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
055 
WHUS43 KGRR 220159
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
959 PM EDT Tue Aug 21 2018

MIZ037-043-050-221000-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180822T1800Z/
Mason-Oceana-Muskegon-
959 PM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

Muskegon State Park...Mears State Park in Pentwater... Stearns
Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...North winds of up to 30 mph and
  waves of 5 to 9 feet will create very hazardous conditions on
  Lake Michigan through Wednesday. North sides of north piers will
  be particularly dangerous places to swim. Waves of this 
  magnitude are not seen very often in the summer swim season. 
  Caution is advised. Waves will top pier structures and sweep 
  completely across them. Steer clear of the pier and stay dry 
  when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-221000-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
959 PM EDT Tue Aug 21 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT THROUGH WEDNESDAY
EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...North winds of up to 30 mph and 
  waves of 5 to 9 feet will create very hazardous conditions on 
  Lake Michigan through Wednesday. North sides of north piers will
  be particularly dangerous places to swim. Waves of this 
  magnitude are not seen very often in the summer swim season. 
  Caution is advised. Waves will top pier structures and sweep 
  completely across them. Steer clear of the pier and stay dry 
  when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
464 
WHUS43 KGRR 220745
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
345 AM EDT Wed Aug 22 2018

MIZ037-043-050-221545-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180822T1800Z/
Mason-Oceana-Muskegon-
345 AM EDT Wed Aug 22 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

Muskegon State Park...Mears State Park in Pentwater... Stearns
Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves around waves of 4 to 7 feet
  this morning will create very hazardous conditions on Lake
  Michigan before subsiding in the afternoon. North sides of north
  piers will be particularly dangerous places to swim. In
  addition... water temperatures may have cooled dramatically
  since Tuesday, posing a risk of hypothermia... muscle cramps...
  and reflexive inhalation to anyone who jumps into the water. 
  Caution is advised. Steer clear of the pier and stay dry when 
  waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-221545-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
345 AM EDT Wed Aug 22 2018

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

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...North winds of up to 25 mph and
  waves of 4 to 7 feet will create very hazardous conditions on
  Lake Michigan through this evening. North sides of north piers 
  will be particularly dangerous places to swim. Waves of this 
  magnitude are not seen very often in the summer swim season. 
  Caution is advised. Waves will top pier structures and sweep 
  completely across them. Steer clear of the pier and stay dry 
  when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
846 
WHUS43 KGRR 221401
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
1001 AM EDT Wed Aug 22 2018

MIZ037-043-050-221800-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180822T1800Z/
Mason-Oceana-Muskegon-
1001 AM EDT Wed Aug 22 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM GRAND HAVEN TO MANISTEE.

Muskegon State Park...Mears State Park in Pentwater... Stearns
Park in Ludington.

* OVERVIEW/POTENTIAL IMPACTS...Waves 3 to 6 feet this morning will
  create hazardous conditions on Lake Michigan before subsiding in
  the afternoon. North sides of north piers will be particularly
  dangerous places to swim. In addition... water temperatures have
  cooled dramatically since Tuesday, posing a risk of 
  hypothermia... muscle cramps... and reflexive inhalation to 
  anyone who jumps into the water. Caution is advised. Steer clear
  of the pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$

MIZ056-064-071-222215-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
1001 AM EDT Wed Aug 22 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves of 4 to 7 feet will create 
  hazardous conditions on Lake Michigan through this evening. 
  North sides of north piers will be particularly dangerous places
  to swim. Waves of this magnitude are not seen very often in the
  summer swim season. Caution is advised. Waves will top pier 
  structures and sweep completely across them. Steer clear of the 
  pier and stay dry when waves are high! 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
609 
WHUS43 KGRR 221837
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
237 PM EDT Wed Aug 22 2018

MIZ056-064-071-230000-
/O.CON.KGRR.BH.S.0011.000000T0000Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
237 PM EDT Wed Aug 22 2018

...BEACH HAZARDS STATEMENT REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* HIGH WAVE ACTION... STRONG CURRENTS AND DANGEROUS SWIMMING 
  CONDITIONS EXPECTED. 

* STRONG STRUCTURAL CURRENTS EXPECTED.

* STRONG LONGSHORE CURRENTS EXPECTED.

* RIP CURRENTS POSSIBLE.

* LOCATION...BEACHES FROM St. Joseph to Grand Haven.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS INCLUDE...

North Beach in South Haven...Holland State Park...

* OVERVIEW/POTENTIAL IMPACTS...Waves of 4 to 6 feet will create
  hazardous conditions on Lake Michigan into this evening. North
  sides of north piers will be particularly dangerous places to
  swim. Waves will top pier structures and sweep completely across
  them. Steer clear of the pier and stay dry when waves are high!
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

High Wave Action makes swimming difficult and can tire even a
strong swimmer quickly.

Structural currents form along piers where longshore currents and
wave action flow into the structure. Structural Currents can
sweep you out into deeper water along the pier structure.

A longshore current is a lake current that moves parallel to
shore. Longshore currents can be strong enough to Prevent
swimmers from being able to keep their feet on the bottom...
making it difficult to return to shore.

Rip currents are powerful channels of water flowing quickly away
from shore...which occur most often at low spots or breaks in
sandbars. Rip currents can sweep you into deeper water.

&&

$$


WEATHER.GOV/GRR
210 
WHUS43 KGRR 221951
CFWGRR

LAKESHORE HAZARD MESSAGE
National Weather Service GRAND RAPIDS MI
351 PM EDT Wed Aug 22 2018

MIZ056-064-071-222100-
/O.CAN.KGRR.BH.S.0011.000000T0000Z-180823T0000Z/
Ottawa-Allegan-Van Buren-
351 PM EDT Wed Aug 22 2018

...BEACH HAZARDS STATEMENT IS CANCELLED...

Winds and waves will continue to decrease this afternoon and the 
National Weather Service in Grand Rapids has cancelled the Beach 
Hazards Statement.


$$


WEATHER.GOV/GRR

What forecasters said that day

The local office's own words before this beach hazards statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Grand Rapids, MI wrote its last area forecast discussion before this beach hazards statement went out at Aug 20, 3:30 AM EDT, 49 minutes earlier.

Area forecast discussion, Aug 20, 3:30 AM EDT, 49 minutes before
Area Forecast Discussion
National Weather Service Grand Rapids MI
330 AM EDT Mon Aug 20 2018

LATEST UPDATE...
Synopsis/Short Term/Long Term/Marine

.SYNOPSIS...
Issued at 330 AM EDT Mon Aug 20 2018

Low pressure will track across Lake Michigan tonight and move across
Southern Lower Michigan on Tuesday. Clouds will thicken today in
advance of the low with showers and thunderstorms moving in from the
southwest late this afternoon. Periods of showers and thunderstorms
are expected both tonight and on Tuesday. Rainfall totals of around
an inch are possible in most areas. A period of dry weather is
expected from Wednesday through much of Friday as high pressure
slides slowly east through the Great Lakes. Another chance for
showers and storms will come Friday afternoon into Saturday as a
warm front pushes through the area. Temperatures will cool a bit
behind the early week system with highs in the 70s forecast for
Tuesday, Wednesday and Thursday. Next weekend however the warm air
rushes back in with highs forecast to push well into the 80s if not
the 90s.

&&

.SHORT TERM...(Today through Wednesday)
Issued at 330 AM EDT Mon Aug 20 2018

Focus in the short term is squarely on the low that will traverse
the area tonight and Tuesday. The main impact from the system will
be a widespread rain, with locally heavy amounts possible. The rain
looks to come in somewhat of a one two punch with a warm air
advection surge tonight, followed by a deformation zone on Tuesday.
Models have been consistent in showing rainfall generally between
0.50 and 1.50 inches across the area. Where the warm air advection
rainfall overlaps with the deformation zone rain amounts may exceed
2.00 inches in that area. A bit difficult to nail down the area of
heaviest rain at this point. WPC has a broad brushed area of
rainfall totals around an inch and cannot argue with that forecast
at this point.

Thunderstorms will be in the mix as MUCAPE values eclipse the 1000
j/kg level. Not expecting anything close to severe as this system
will be more of a rain producer. Thunderstorms looks possible from
about 21z this afternoon through Tuesday evening.

Otherwise, clouds will thicken through the day with showers and
storms moving in from the southwest this afternoon. Behind the
system, a few showers may linger into Tuesday night before the
moisture declines and we clear out into Wednesday. High temperatures
on Wednesday will be very comfortable by August standards in the
middle 70s.

.LONG TERM...(Wednesday night through Sunday)
Issued at 330 AM EDT Mon Aug 20 2018

The long term will start out quiet as surface high pressure drifts
through the area from Wednesday night through Friday morning.
Temperatures will be seasonable Thursday and Friday with highs near
80.

A more active period will occur from Friday afternoon through Friday
night and into Saturday as a warm front moves through the Great
Lakes. Showers and a few thunderstorms will accompany this frontal
passage. The warm front will usher in a surge of much warmer air.
850mb temps rise to in excess of +20C in both the GFS and ECMWF on
Sunday which would yield highs above 90F. For now our forecast for
Sunday has 80s, but this may need to be bumped higher with time.

&&

.AVIATION...(For the 06Z TAFS through 06Z Monday night)
Issued at 1145 PM EDT Sun Aug 19 2018

VFR conditions will slowly deteriorate to a mix of VFR/MVFR with
patchy IFR possible during the early morning hours Monday due to
the development of patchy fog and some low clouds. Conditions will
then improve to VFR by mid morning as low clouds/patchy fog
dissipates. VFR conditions will then continue through Monday
afternoon.

Scattered showers and thunderstorms will gradually move in from
the southwest and likely affect all of the terminals Monday
evening. Brief reductions to IFR/MVFR are possible as storms and
heavier showers move through.

&&

.MARINE...
Issued at 330 AM EDT Mon Aug 20 2018

Lake Michigan is going to look a lot more like fall the next 48
hours as winds and waves kick up to Autumn type levels. Low pressure
centered over Northern Missouri early this Monday morning will track
east-northeast and move across Southern Lake Michigan tonight. As
the low moves northeast into Ontario, stronger north winds will fill
in down Lake Michigan in the wake of the passage of the low. Winds
look to increase to 20 to 30 knots Tuesday afternoon and Tuesday
night. We are expecting some gale force gusts, but at this time we
think it will be limited and not worthy of a Gale Warning. Tuesday
afternoon and evening will be the time frame of strongest winds and
the time frame we will be watching for potential gales.

Air temperatures over the lake will be in the 60s, with water temps
well into the 70s so this will be a cold air advection event, much
like a fall system. Waves will likely build into the 6 to 10 foot
range in our nearshore waters during the height of the wind.

We will be posting both Small Craft Advisories and Beach Hazards
Statements from Tuesday midday through Wednesday afternoon and
evening. The winds and waves hit the northern zones first (15z Tues)
and the south a bit later (18z Tues). Headlines will run until 18z
Wed in the north and 00z Thurs in the south. The break point will be
at Grand Haven.

Piers will be places to avoid during the largest waves as high water
levels will allow waves to completely wash over the pier surface.
The public should avoid pier structures Tuesday into Wednesday.
Swimming will be hazardous as the short period wind waves will be
about as large as they ever get in the heart of the swim season.
When in doubt don't go out.

&&

.HYDROLOGY...
Issued at 324 PM EDT Sun Aug 19 2018

Significant rainfall is possible Monday night and Tuesday. An inch
to an inch and a half of rain is possible during this time. Within
bank rises are possible by mid week on area rivers. Additionally,
locally heavy rainfall could create ponding on roads and other low
lying areas.

&&

.GRR WATCHES/WARNINGS/ADVISORIES...
MI...Beach Hazards Statement from Tuesday afternoon through Wednesday
     evening for MIZ056-064-071.

     Beach Hazards Statement from Tuesday morning through Wednesday
     afternoon for MIZ037-043-050.

LM...Small Craft Advisory from 11 AM Tuesday to 2 PM EDT Wednesday
     for LMZ847>849.

     Small Craft Advisory from 2 PM Tuesday to 8 PM EDT Wednesday for
     LMZ844>846.

&&

SYNOPSIS...Duke
SHORT TERM...Duke
LONG TERM...Duke
AVIATION...Laurens
HYDROLOGY...04
MARINE...Duke
Hazardous weather outlook, Aug 19, 9:53 PM EDT, 6 hours 26 minutes before
Hazardous Weather Outlook
National Weather Service Grand Rapids MI
953 PM EDT Sun Aug 19 2018

MIZ037>040-043>046-050>052-056>059-064>067-071>074-200800-
Mason-Lake-Osceola-Clare-Oceana-Newaygo-Mecosta-Isabella-Muskegon-
Montcalm-Gratiot-Ottawa-Kent-Ionia-Clinton-Allegan-Barry-Eaton-
Ingham-Van Buren-Kalamazoo-Calhoun-Jackson-
953 PM EDT Sun Aug 19 2018

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Tonight

Patchy dense fog may limit visibilities overnight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A strong storm system, moving through the Great Lakes Monday into
Tuesday will bring thunderstorms with locally heavy rainfall
Monday night into Tuesday morning. Winds will be gusty Tuesday
afternoon.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

LMZ844>849-200800-
St Joseph to South Haven MI-South Haven to Holland MI-
Holland to Grand Haven MI-Grand Haven to Whitehall MI-
Whitehall to Pentwater MI-Pentwater to Manistee MI-
953 PM EDT Sun Aug 19 2018

This hazardous weather outlook is for portions of southwest Lower
Michigan.

.DAY ONE...Tonight

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

A strong storm system, moving through the Great Lakes early next
week, will bring the threat of thunderstorms Monday night into
Tuesday morning. Strong winds ahead behind the storm will likely
result in hazardous boating and swimming conditions Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

wdm bdm

The office that day

Everything else NWS Grand Rapids, MI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 20, 4:06 AM EDTSmall Craft AdvisoryGRR60 hr

Nearby

Beach Hazards Statements in Michigan, 2018Every beach hazards statement in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.