Alert archive / Florida / Rip Current Statements in 2011

Rip Current Statement 20, NWS Miami, FL

November 21, 2011Broward County, Miami-Dade County, Palm Beach County, Florida

NWS Miami, FL issued this rip current statement at Nov 21, 2011, 2:56 AM EST for Broward County, Miami-Dade County, Palm Beach County, Florida. It was in force for 14 hr.

The area

The counties it named.

The facts

Issued: Nov 21, 2011, 2:56 AM EST (07:56 UTC)
Expired: Nov 21, 2011, 5:00 PM EST
In force: 14 hr
Issued by: NWS Miami, FL

Counties Broward County, FL, Miami-Dade County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 59 km from the middle of the area, began a volume at 08:00 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

Miami, FL (KMFL), launched 00:00Z, 7.9 hours before the alert went out and 39 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: 1448 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 500 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: -17 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.

436 
WHUS42 KMFL 210756
CFWMFL

COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MIAMI FL
256 AM EST MON NOV 21 2011

...HIGH RISK OF RISK CURRENTS ATLANTIC BEACHES...

FLZ168-172-173-211600-
/O.NEW.KMFL.RP.S.0020.111121T0800Z-111121T2200Z/
COASTAL PALM BEACH-COASTAL BROWARD-COASTAL MIAMI DADE-
256 AM EST MON NOV 21 2011

...RIP CURRENT RISK IN EFFECT THROUGH THIS AFTERNOON...

* TIMING...EASTERLY WINDS AROUND 15 MPH, COMBINED WITH LOW TIDES
  LATE MORNING, LEAD TO A HIGH RISK OF RIP CURRENTS AT THE BEACHES
  OF PALM BEACH...BROWARD AND MIAMI DADE COUNTIES. 

* IMPACTS...DANGEROUS RIP CURRENTS WILL REMAIN AN ONGOING THREAT
  ALONG THE ATLANTIC COAST BEACHES TODAY. THE BEST TIME FOR RIP
  CURRENTS WILL BE AROUND 10 AM EST THIS MORNING. SWIMMING IS NOT
  ADVISED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 AND THE BEACH PATROL. PAY
ATTENTION TO FLAGS AND POSTED SIGNS.

IF YOU BECOME CAUGHT IN A RIP CURRENT...DO NOT PANIC. REMAIN
CALM AND BEGIN TO SWIM PARALLEL TO SHORE. ONCE YOU ARE AWAY FROM
THE FORCE OF THE RIP CURRENT...BEGIN TO SWIM BACK TO THE BEACH.
DO NOT ATTEMPT TO SWIM DIRECTLY AGAINST A RIP CURRENT. EVEN A
STRONG SWIMMER CAN BECOME EXHAUSTED QUICKLY.

&&

$$


PLEASE VISIT THE FOLLOWING WEBSITE TO SHARE YOUR THOUGHTS ON THE
NEW RIP CURRENT HAZARD...

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

Nearby

Rip Current Statements in Florida, 2011 Every rip current statement in 2011

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.