Alert archive / Florida / Coastal Flood Statements in 2011

Coastal Flood Statement 2, NWS Miami, FL

February 21, 2011Palm Beach County, Florida

NWS Miami, FL issued this coastal flood statement at Feb 21, 2011, 9:16 AM EST for Palm Beach County, Florida. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Feb 21, 2011, 9:16 AM EST (14:16 UTC)
Expired: Feb 21, 2011, 7:00 PM EST
In force: 10 hr
Issued by: NWS Miami, FL

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 115 km from the middle of the area, began a volume at 14:16 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 12:00Z, 2.3 hours before the alert went out and 93 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 733 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -68 m²/s²
0-3 km storm-relative helicity: 14 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.

863 
WHUS42 KMFL 211416
CFWMFL

URGENT - IMMEDIATE BROADCAST REQUESTED
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE MIAMI FL
916 AM EST MON FEB 21 2011

...HIGH RISK OF RIP CURRENTS ALONG THE PALM BEACH COUNTY BEACHES...

FLZ168-212215-
/O.NEW.KMFL.CF.S.0002.110221T1416Z-110222T0000Z/
COASTAL PALM BEACH-
916 AM EST MON FEB 21 2011

THE COMBINATION OF SOUTHEASTERLY WINDS NEAR 15 MPH AND A LONG
PERIOD NORTHEAST SWELL EXPECTED TO INCREASE INTO THE AFTERNOON AND
EVENING HOURS WILL RESULT IN A HIGH RISK OF RIP CURRENTS FOR THE
PALM BEACH COUNTY BEACHES TODAY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A RIP CURRENT IS A 10 TO 30 YARD WIDE CHANNEL OF WATER THAT CAN
PULL EVEN A STRONG SWIMMER FROM NEAR OR INSIDE THE SAND BAR INTO
DEEPER WATER. DUE TO THE LIFE THREATENING DANGERS THAT THESE
STRONG CURRENTS OF WATER POSE...SWIMMING IS NOT ADVISED.

IF YOU DO GO INTO THE WATERS...SWIM AT GUARDED BEACHES AND HEED
THE ADVICE OF THE BEACH PATROL. IF CAUGHT IN THE SEAWARD PULL OF A
RIP CURRENT DO NOT ATTEMPT TO MOVE DIRECTLY TOWARD SHORE.
INSTEAD...MOVE SIDEWAYS ACROSS THE RIP CURRENT UNTIL THE PULL
EASES.

AN ALTERNATE METHOD OF ESCAPE IS TO LET THE RIP CURRENT PULL YOU
SEAWARD 50 TO 100 YARDS...WHERE THE FORCE WEAKENS...AND THEN SWIM
TOWARD THE BEACH AT AN ANGLE AWAY FROM THE CURRENT.

&&

$$


HTTP://WWW.WEATHER.GOV/MIAMI

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 21, 1:47 AM EST	Dense Fog Advisory	MFL	Broward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more	7 hr

Nearby

Coastal Flood Statements in Florida, 2011 Every coastal flood 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.