Alert archive / Florida / Rip Current Statements in 2017

Rip Current Statement 31, NWS Melbourne, FL

September 23, 2017Volusia County, Florida

NWS Melbourne, FL issued this rip current statement at Sep 23, 2017, 4:47 AM EDT for Volusia County, Florida. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued
Sep 23, 2017, 4:47 AM EDT (08:47 UTC)
Expired
Sep 23, 2017, 8:15 PM EDT
In force
15 hr
Issued by
NWS Melbourne, FL

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 116 km from the middle of the area, began a volume at 08:47 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

Cape Canaveral, FL (KXMR), launched 00:00Z, 8.8 hours before the alert went out and 91 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, Cape Canaveral, FL at 00:00Z on 2017-09-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 428 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, Cape Canaveral, FL at 00:00Z on 2017-09-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -69 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
428 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
833 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-69 m²/s²
0-3 km storm-relative helicity
-5 m²/s²
Significant tornado parameter
0.0
Supercell composite
-1.0

Open this sounding in Storm Lab

The text

As transmitted.

894 
WHUS42 KMLB 230847
CFWMLB

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MELBOURNE FL
447 AM EDT SAT SEP 23 2017

...LONG PERIOD SWELLS FROM HURRICANE MARIA WILL PRODUCE HAZARDOUS
BEACH CONDITIONS THIS WEEKEND...


HURRICANE MARIA IS FORECAST TO MOVE NORTHWARD WELL EAST OF, AND 
PARALLEL TO, FLORIDA'S ATLANTIC COAST THIS WEEKEND. MARIA WILL
CAUSE THE WINDS AND SEAS TO BECOME ELEVATED ACROSS THE COASTAL
WATERS WHILE ALSO CAUSING LONG PERIOD SWELLS TO PROPAGATE TOWARD 
THE EAST CENTRAL FLORIDA SHORELINE. THIS WILL MAKE FOR HAZARDOUS
BEACH AND BOATING CONDITIONS. THE RISK FOR RIP CURRENTS WILL BE
HIGH, AND SURF WILL BECOME VERY ROUGH. 


FLZ047-054-059-064-141-147-250800-
/O.NEW.KMLB.SU.Y.0004.170923T1800Z-170925T0800Z/
/O.NEW.KMLB.RP.S.0031.170923T0847Z-170924T0300Z/
SOUTHERN BREVARD COUNTY-INDIAN RIVER-ST. LUCIE-MARTIN-
COASTAL VOLUSIA COUNTY-NORTHERN BREVARD COUNTY-
447 AM EDT SAT SEP 23 2017

...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS EVENING...
...HIGH SURF ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 4 AM
EDT MONDAY...

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A HIGH SURF
ADVISORY, WHICH IS IN EFFECT FROM 2 PM THIS AFTERNOON TO 4 AM EDT
MONDAY. A HIGH RIP CURRENT RISK HAS ALSO BEEN ISSUED. THIS HIGH
RIP CURRENT RISK IS IN EFFECT THROUGH THIS EVENING. 

* WAVES AND SURF...SEAS WITHIN THE NEARSHORE WATERS WILL BUILD TO
  5-7 FEET THIS AFTERNOON, 6-9 FEET TONIGHT, AND 8-11 FEET ON
  SUNDAY. LARGE BREAKING WAVES AND LONG PERIOD SWELLS WILL MOVE
  LARGE VOLUMES OF WATER ONTO THE BEACHES. 

* TIMING...CONDITIONS WILL DETERIORATE STARTING THIS AFTERNOON AND
  REMAIN HAZARDOUS THROUGH THE WEEKEND. MINOR TO LOCALLY MODERATE
  BEACH EROSION MAY OCCUR NEAR THE TIMES OF HIGH TIDE ROUGHLY
  BETWEEN 10 PM TO 2 AM TONIGHT, 10 AM TO 2 PM TOMORROW, AND AGAIN
  10 PM TO 2 AM TOMORROW NIGHT ALONG THE EAST CENTRAL FLORIDA
  COASTLINE.

* IMPACTS...LARGE BREAKING WAVES WILL MAKE SWIMMING INCREASINGLY
  DIFFICULT AND DANGEROUS. NUMEROUS RIP CURRENTS WILL LIKELY FORM,
  AND ESPECIALLY DURING THE TIMES OF THE OUTGOING TIDE. POUNDING
  SURF CAN EASILY KNOCK YOU OFF OF YOUR FEET IF WALKING IN THE
  SURF. ROUGH SURF MAY CAUSE ADDITIONAL EROSION, ESPECIALLY IN
  PLACES WEAKENED BY RECENT HURRICANE IRMA AND LAST SEASON'S
  HURRICANE MATTHEW. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN
THE ADVISORY AREA...PRODUCING LOCALIZED BEACH EROSION AND
DANGEROUS SWIMMING CONDITIONS.

THERE IS A HIGH RISK OF RIP CURRENTS.

RIP CURRENTS ARE POWERFUL CHANNELS OF WATER FLOWING QUICKLY AWAY
FROM SHORE, WHICH OCCUR MOST OFTEN AT LOW SPOTS OR BREAKS IN THE
SANDBAR AND IN THE VICINITY OF STRUCTURES SUCH AS JETTIES AND
PIERS. HEED THE ADVICE OF LIFEGUARDS...BEACH PATROL FLAGS AND
SIGNS.


&&

$$
1 follow-up statement
685 
WHUS42 KMLB 240015
CFWMLB

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MELBOURNE FL
815 PM EDT SAT SEP 23 2017

...LONG PERIOD SWELLS FROM HURRICANE MARIA WILL PRODUCE HAZARDOUS
BEACH CONDITIONS THIS WEEKEND...

HURRICANE MARIA IS FORECAST TO MOVE NORTHWARD WELL EAST OF, AND
PARALLEL TO, FLORIDA'S ATLANTIC COAST THIS WEEKEND. MARIA WILL
CAUSE THE WINDS AND SEAS TO BECOME ELEVATED ACROSS THE COASTAL
WATERS WHILE ALSO CAUSING LONG PERIOD SWELLS TO PROPAGATE TOWARD
THE EAST CENTRAL FLORIDA SHORELINE. THIS WILL MAKE FOR HAZARDOUS
BEACH AND BOATING CONDITIONS. THE RISK FOR RIP CURRENTS WILL BE
HIGH, AND SURF WILL BECOME VERY ROUGH.

FLZ047-054-059-064-141-147-240900-
/O.CAN.KMLB.RP.S.0031.000000T0000Z-170924T0300Z/
/O.CON.KMLB.SU.Y.0004.000000T0000Z-170925T0800Z/
SOUTHERN BREVARD COUNTY-INDIAN RIVER-ST. LUCIE-MARTIN-
COASTAL VOLUSIA COUNTY-NORTHERN BREVARD COUNTY-
815 PM EDT SAT SEP 23 2017

...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 4 AM EDT MONDAY...

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS CANCELLED THE HIGH
RIP CURRENT RISK. 

* WAVES AND SURF...SEAS WITHIN THE NEAR SHORE WATERS WILL BUILD TO
  6-9 FEET OVERNIGHT, AND 8-10 FEET ON SUNDAY. LARGE BREAKING 
  WAVES AND LONG PERIOD SWELLS WILL MOVE LARGE VOLUMES OF WATER 
  ONTO THE BEACHES. 

* TIMING...CONDITIONS WILL CONTINUE TO DETERIORATE AND REMAIN
  HAZARDOUS THROUGH THE WEEKEND. MINOR TO LOCALLY MODERATE BEACH
  EROSION MAY OCCUR NEAR THE TIMES OF HIGH TIDE ROUGHLY BETWEEN 10
  PM TO 2 AM TONIGHT, 10 AM TO 2 PM ON SUNDAY, AND AGAIN 10 PM TO
  2 AM SUNDAY NIGHT ALONG THE EAST CENTRAL FLORIDA COASTLINE. 

* IMPACTS...LARGE BREAKING WAVES WILL MAKE SWIMMING INCREASINGLY
  DIFFICULT AND DANGEROUS. NUMEROUS RIP CURRENTS WILL LIKELY FORM,
  AND ESPECIALLY DURING THE TIMES OF THE OUTGOING TIDE. POUNDING
  SURF CAN EASILY KNOCK YOU OFF OF YOUR FEET IF WALKING IN THE
  SURF. ROUGH SURF MAY CAUSE ADDITIONAL EROSION, ESPECIALLY IN
  PLACES WEAKENED BY RECENT HURRICANE IRMA AND LAST SEASON'S
  HURRICANE MATTHEW. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A HIGH SURF ADVISORY MEANS THAT HIGH SURF WILL AFFECT BEACHES IN
THE ADVISORY AREA...PRODUCING LOCALIZED BEACH EROSION AND
DANGEROUS SWIMMING CONDITIONS.

&&

$$

SEDLOCK

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 23, 4:47 AM EDTHigh Surf AdvisoryMLBVolusia65 hr

Nearby

Rip Current Statements in Florida, 2017Every rip current statement in 2017

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.