Alert archive / Florida / Coastal Flood Statements in 2020

Coastal Flood Statement 11, NWS Miami, FL

October 15, 2020Collier County, Florida

NWS Miami, FL issued this coastal flood statement at Oct 15, 2020, 3:23 PM EDT for Collier County, Florida. It was in force for 4 days.

The area

The counties it named.

The facts

Issued
Oct 15, 2020, 3:23 PM EDT (19:23 UTC)
Expired
Oct 19, 2020, 3:35 AM EDT
In force
4 days
Issued by
NWS Miami, FL

County Collier County, FL

The radar

The Miami radar (KAMX), 111 km from the middle of the area, began a volume at 19:24 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, 7.4 hours before the alert went out and 113 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 2020-10-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1082 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, Miami, FL at 12:00Z on 2020-10-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 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
1082 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
823 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this coastal flood statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this coastal flood statement went out at Oct 15, 1:50 PM EDT, 1 hour 33 minutes earlier.

Area forecast discussion, Oct 15, 1:50 PM EDT, 1 hour 33 minutes before
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Hazardous weather outlook, Oct 15, 9:42 AM EDT, 5 hours 41 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
942 AM EDT Thu Oct 15 2020

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
160145-
Lake Okeechobee-Biscayne Bay-
Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM-
Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM-
Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM-
Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM
excluding the territorial waters of Bahamas-Glades-Hendry-
Inland Palm Beach-Metro Palm Beach-Coastal Collier-Inland Collier-
Inland Broward-Metro Broward-Inland Miami-Dade-Metro Miami-Dade-
Mainland Monroe-Coastal Palm Beach-Coastal Broward-Coastal Miami-
Dade-Far South Miami-Dade-
Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM-
Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM-
Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM-
942 AM EDT Thu Oct 15 2020

...Minor Coastal Flooding Possible During High Tides East Coast...
...Thunderstorms May Produce Heavy Rain and Gusty Winds...

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Thunderstorms: Scattered thunderstorms will be possible, primarily
across the eastern portions of South Florida and the Lake Okeechobee
region. The strongest storms will be capable of frequent cloud to
ground lightning, gusty winds, heavy rainfall, and localized
flooding.

Coastal Flooding: Higher than normal tides (highest predicted tides
of the year) could lead to minor coastal flooding around the periods
of high tide.

Rip Currents: There is a moderate risk of rip currents at the
Atlantic Coast beaches.

Flooding: Locally heavy rainfall, especially in areas that see salt
water intrusion from higher than normal tides, could lead to
flooding of urban and/or poorly drained areas.

Wind: Wind gusts up to 45 mph may be possible in the strongest
thunderstorms this afternoon, especially the Atlantic waters and
eastern areas.

Waterspouts: A few waterspouts cannot be ruled out across the local
waters.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

Higher than normal tides (highest predicted tides of the year) could
lead to minor coastal flooding through the forecast period.

Shower and thunderstorm chances and associated hazards continue late
week as a cold front approaches the region. Breezy easterly winds
are expected this weekend which may lead to hazardous marine and
boating conditions along with an increase in the threat of rip
currents along the east coast beaches of South Florida.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not anticipated, however individual
spotters are encouraged to report high wind, hail, waterspouts, and
flooding to the National Weather Service forecast office in Miami.
Please relay any information about observed severe weather to the NWS
while following all local, state, and CDC guidelines.

For more information...visit the National Weather Service in
Miami website at www.weather.gov/miami.

In the hours before

Local storm report, Oct 15, 11:13 AM EDT, 4 hours 10 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Oct 15, 3:23 PM EDTCoastal Flood AdvisoryMFLBroward, Miami-Dade, Palm Beach7 days
Oct 15, 4:50 PM EDTSpecial Weather StatementMFLMonroe40 min
Oct 15, 5:54 PM EDTSpecial Weather StatementMFLMiami-Dade51 min
Oct 15, 6:22 PM EDTSpecial Weather StatementMFLMonroe53 min

Nearby

Coastal Flood Statements in Florida, 2020Every coastal flood 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.