Alert archive / Florida / Rip Current Statements in 2020

Rip Current Statement 36, NWS Jacksonville, FL

November 23, 2020Duval County, Flagler County, Nassau County, Florida

NWS Jacksonville, FL issued this rip current statement at Nov 23, 2020, 1:42 AM EST for Duval County, Flagler County, Nassau County, Florida. It took effect at Nov 23, 2020, 7:00 AM EST. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued
Nov 23, 2020, 1:42 AM EST (06:42 UTC)
In effect from
Nov 23, 2020, 7:00 AM EST
Expired
Nov 24, 2020, 1:54 AM EST
In force
19 hr
Issued by
NWS Jacksonville, FL

Counties Duval County, FL, Flagler County, FL, Nassau County, FL

The radar

The Jacksonville radar (KJAX), 40 km from the middle of the area, began a volume at 06:42 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

Jacksonville, FL (KJAX), launched 00:00Z, 6.7 hours before the alert went out and 42 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, Jacksonville, FL at 00:00Z on 2020-11-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 351 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 00:00Z on 2020-11-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
351 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
574 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
159 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

As transmitted.

336 
WHUS42 KJAX 230642
CFWJAX

Coastal Hazard Message
National Weather Service Jacksonville FL
142 AM EST Mon Nov 23 2020

FLZ124-125-133-138-240900-
/O.NEW.KJAX.RP.S.0036.201123T1200Z-201124T0900Z/
Coastal Nassau-Coastal Duval-Coastal St. Johns-Coastal Flagler-
142 AM EST Mon Nov 23 2020

...HIGH RIP CURRENT RISK IN EFFECT FROM 7 AM EST THIS MORNING
THROUGH LATE TONIGHT...

* WHAT...Dangerous rip currents expected.

* WHERE...Northeast Florida Beaches.

* WHEN...From 7 AM EST this morning through late tonight.

* IMPACTS...Rip currents can sweep even the best swimmers away 
  from shore into deeper water.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Swim near a lifeguard. If caught in a rip current, relax and
float. Don't swim against the current. If able, swim in a
direction following the shoreline. If unable to escape, face the
shore and call or wave for help.

&&

$$
1 follow-up statement
583 
WHUS42 KJAX 240654
CFWJAX

Coastal Hazard Message
National Weather Service Jacksonville FL
154 AM EST Tue Nov 24 2020

FLZ124-125-133-138-240800-
/O.CAN.KJAX.RP.S.0036.000000T0000Z-201124T0900Z/
Coastal Nassau-Coastal Duval-Coastal St. Johns-Coastal Flagler-
154 AM EST Tue Nov 24 2020

...HIGH RIP CURRENT RISK IS CANCELLED...


$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 23, 1:50 AM ESTSmall Craft AdvisoryJAX24 hr

Nearby

Rip Current Statements in Florida, 2020Every rip current statement in 2020

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.