Alert archive / Michigan / Beach Hazards Statements in 2012

Beach Hazards Statement 3, NWS Grand Rapids, MI

June 21, 2012Allegan County, Muskegon County, Ottawa County, Michigan

NWS Grand Rapids, MI issued this beach hazards statement at Jun 21, 2012, 10:49 AM EDT for Allegan County, Muskegon County, Ottawa County, Michigan. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 21, 2012, 10:49 AM EDT (14:49 UTC)
Expired
Jun 21, 2012, 3:00 PM EDT
In force
4 hr
Issued by
NWS Grand Rapids, MI

Counties Allegan County, MI, Muskegon County, MI, Ottawa County, MI

The radar

The Grand Rapids radar (KGRR), 45 km from the middle of the area, began a volume at 14:51 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

Detroit, MI (KDTX), launched 12:00Z, 2.8 hours before the alert went out and 219 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, Detroit, MI at 12:00Z on 2012-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 25 joules per kilogram.LCLLFCEL10008507005003002001001 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, Detroit, MI at 12:00Z on 2012-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 square meters per square second.193958Sfc1 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
25 J/kg
Mixed-layer CIN
-212 J/kg
Mixed-layer LCL
1531 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
67 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

716 
WHUS43 KGRR 211449
CFWGRR

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1049 AM EDT THU JUN 21 2012

MIZ050-056-064-211900-
/O.NEW.KGRR.BH.S.0003.120621T1449Z-120621T1900Z/
MUSKEGON-OTTAWA-ALLEGAN-
INCLUDING THE BEACHES OF...MUSKEGON STATE PARK...
PJ HOFFMASTER STATE PARK...DUCK LAKE STATE PARK...
PERE MARQUETTE PARK...MEINERT PARK...GRAND HAVEN STATE PARK...
KIRK PARK...TUNNEL PARK...HOLLAND STATE PARK...OVAL BEACH...
WEST SIDE PARK...SAUGATUCK DUNES STATE PARK...DOUGLAS BEACH
1049 AM EDT THU JUN 21 2012

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL 3 PM EDT THIS
AFTERNOON...

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A BEACH
HAZARDS STATEMENT FOR DANGEROUS SWIMMING CONDITIONS...WHICH IS IN
EFFECT UNTIL 3 PM EDT THIS AFTERNOON. 

* HIGH WAVE ACTION AND DANGEROUS SWIMMING CONDITIONS EXPECTED.

* STRONG STRUCTURAL CURRENTS...POSSIBLE

* STRONG LONGSHORE CURRENTS...POSSIBLE

* RIP CURRENTS...EXPECTED

* LOCATION...BEACHES FROM SOUTH HAVEN TO MEINART PARK

* OVERVIEW/POTENTIAL IMPACTS...GUSTY WEST WINDS WILL DECREASE
  TODAY. WAVES OVER 4 FEET THIS MORNING WILL SUBSIDE THIS AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE SURE OF YOUR SWIMMING ABILITY. CHILDREN SHOULD NOT ENTER THE
WATER UNSUPERVISED AND WITHOUT A CERTIFIED FLOTATION DEVICE.
CAUTION SHOULD BE USED WHEN IN OR NEAR THE WATER. PAY ATTENTION
TO FLAGS AND SIGNS POSTED NEAR BEACH ACCESS POINTS AND LIFEGUARD
STATIONS. 

HIGH WAVE ACTION ALONE CAN MAKE SWIMMING DIFFICULT ON DAYS SUCH
AS THIS. INCOMING WAVES IN RAPID SUCCESSION CAN TIRE A SWIMMER
QUICKLY.

STRUCTURAL CURRENTS FORM ALONG PIERS WHERE LONGSHORE CURRENTS AND
WAVE ACTION FLOW INTO THE STRUCTURE. STRUCTURAL CURRENTS CAN
SWEEP YOU OUT LAKEWARD 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 OUT LAKEWARD.

PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW BEACH HAZARDS STATEMENT...

HTTP://WWW.WEATHER.GOV/SURVEY/NWS-SURVEY.PHP?CODE=CHMBHS

&&

$$


WEATHER.GOV/GRR
1 follow-up statement
207 
WHUS43 KGRR 211854
CFWGRR

LAKESHORE HAZARD MESSAGE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
254 PM EDT THU JUN 21 2012

MIZ050-056-064-212000-
/O.EXP.KGRR.BH.S.0003.000000T0000Z-120621T1900Z/
MUSKEGON-OTTAWA-ALLEGAN-
INCLUDING THE BEACHES OF...MUSKEGON STATE PARK...
PJ HOFFMASTER STATE PARK...DUCK LAKE STATE PARK...
PERE MARQUETTE PARK...MEINERT PARK...GRAND HAVEN STATE PARK...
KIRK PARK...TUNNEL PARK...HOLLAND STATE PARK...OVAL BEACH...
WEST SIDE PARK...SAUGATUCK DUNES STATE PARK...DOUGLAS BEACH
254 PM EDT THU JUN 21 2012

...BEACH HAZARDS STATEMENT WILL EXPIRE AT 3 PM EDT THIS
AFTERNOON...

WAVES HAVE DIMINISHED TO UNDER 4 FEET AND THEREFORE THE BEACH
HAZARDS STATEMENT WILL BE ALLOWED TO EXPIRE.

$$


WEATHER.GOV/GRR

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 11:00 AM EDTSmall Craft AdvisoryGRR4 hr
Jun 21, 3:45 PM EDTSpecial Weather StatementGRRJackson90 min

Nearby

Beach Hazards Statements in Michigan, 2012Every beach hazards statement in 2012

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.