Alert archive / Florida / Coastal Flood Statements in 2021

Coastal Flood Statement 9, NWS Key West, FL

November 23, 2021Monroe County, Florida

NWS Key West, FL issued this coastal flood statement at Nov 23, 2021, 8:11 AM EST for Monroe County, Florida. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Nov 23, 2021, 8:11 AM EST (13:11 UTC)
Expired
Nov 23, 2021, 1:50 PM EST
In force
6 hr
Issued by
NWS Key West, FL

County Monroe County, FL

The radar

The Miami radar (KAMX), 51 km from the middle of the area, began a volume at 13:14 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, 1.2 hours before the alert went out and 69 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, Miami, FL at 12:00Z on 2021-11-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Miami, FL at 12:00Z on 2021-11-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
951 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

863 
WHUS42 KKEY 231311
CFWKEY

Coastal Hazard Message
National Weather Service Key West FL
811 AM EST Tue Nov 23 2021

FLZ077-231415-
/O.CAN.KKEY.CF.S.0008.000000T0000Z-211123T1600Z/
Monroe Middle Keys-
811 AM EST Tue Nov 23 2021

The Coastal Flood Statement is cancelled for the middle Keys.

$$

FLZ076-232200-
/O.NEW.KKEY.CF.S.0009.211123T1311Z-211123T2200Z/
Monroe Upper Keys-
811 AM EST Tue Nov 23 2021

* WHAT...Minor saltwater flooding.

* WHERE...Upper Florida Keys.

* WHEN...Through this afternoon.

* IMPACTS...Minor saltwater flooding of low elevation streets 
  and lots is likely. Some storm drains will overflow, and some 
  seawalls and docks will be overtopped. Boaters can expect less 
  clearance under fixed bridges. Motorists should remember that 
  persistent puddles around the times of high tide are almost 
  certain to contain a mix of saltwater.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive through flooded roadways.

&&

$$
1 follow-up statement
804 
WHUS42 KKEY 231850
CFWKEY

Coastal Hazard Message
National Weather Service Key West FL
150 PM EST Tue Nov 23 2021

FLZ076-232000-
/O.CAN.KKEY.CF.S.0009.000000T0000Z-211123T2200Z/
Monroe Upper Keys-
150 PM EST Tue Nov 23 2021

The Coastal Flood Statement is cancelled for the Upper Keys of
Monroe County. 

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 22, 10:36 PM ESTSmall Craft AdvisoryKEY54 hr
Nov 23, 4:12 AM ESTCoastal Flood StatementKEYMonroe4 hr

Nearby

Coastal Flood Statements in Florida, 2021Every coastal flood statement in 2021

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.