Alert archive / Michigan / Beach Hazards Statements in 2015

Beach Hazards Statement 5, NWS Grand Rapids, MI

June 10, 20156 counties in Michigan

NWS Grand Rapids, MI issued this beach hazards statement at Jun 10, 2015, 4:13 AM EDT for 6 counties in Michigan. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jun 10, 2015, 4:13 AM EDT (08:13 UTC)
Expired: Jun 10, 2015, 11:51 AM EDT
In force: 8 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 08:13 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, 8.2 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 23 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1957 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 99 m²/s²
0-3 km storm-relative helicity: 238 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

672 
WHUS43 KGRR 100813
CFWGRR

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
413 AM EDT WED JUN 10 2015

MIZ037-043-050-056-064-071-101600-
/O.NEW.KGRR.BH.S.0005.150610T0813Z-150610T1600Z/
MASON-OCEANA-MUSKEGON-OTTAWA-ALLEGAN-VAN BUREN-
413 AM EDT WED JUN 10 2015

...BEACH HAZARDS STATEMENT IN EFFECT UNTIL NOON EDT TODAY...

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS ISSUED A BEACH
HAZARDS STATEMENT FOR DANGEROUS SWIMMING CONDITIONS...WHICH IS IN
EFFECT UNTIL NOON EDT TODAY. 

* 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 MANISTEE.

* BEACHES WITH PARTICULARLY DANGEROUS CONDITIONS TODAY INCLUDE... 

  SOUTH BEACH IN SOUTH HAVEN...
  GRAND HAVEN STATE PARK... 
  PERE MARQUETTE PARK IN MUSKEGON. 

* OVERVIEW/POTENTIAL IMPACTS...SOUTH WINDS OF 20 TO 30 MPH AND 3
  TO 5 FOOT WAVES CAN BE EXPECTED THIS MORNING. THIS WILL RESULT
  IN STRONG LONGSHORE CURRENTS AND STRONG STRUCTURAL CURRENTS
  ALONG/NEAR SOUTH PIERS. WINDS WILL DIMINISH AND BECOME WEST
  LATER THIS MORNING AND WAVES WILL SUBSIDE TO 1 TO 3 FEET FOR
  THE AFTERNOON.

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.

&&

$$

MEADE 

WEATHER.GOV/GRR

1 follow-up statement

369 
WHUS43 KGRR 101551
CFWGRR

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
1151 AM EDT WED JUN 10 2015

MIZ037-043-050-056-064-071-101700-
/O.CAN.KGRR.BH.S.0005.000000T0000Z-150610T1600Z/
MASON-OCEANA-MUSKEGON-OTTAWA-ALLEGAN-VAN BUREN-
1151 AM EDT WED JUN 10 2015

...BEACH HAZARDS STATEMENT IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN GRAND RAPIDS HAS CANCELLED THE
BEACH HAZARDS STATEMENT. 

WINDS AND WAVES WILL GRADUALLY DIMINISH THROUGH THE AFTERNOON.
SWIM HAZARDS WILL ALSO CONTINUE TO DIMINISH.

$$


WEATHER.GOV/GRR

Nearby

Beach Hazards Statements in Michigan, 2015 Every beach hazards statement in 2015

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.