Alert archive / Florida / Areal Flood Advisories in 2021

Areal Flood Advisory 76, NWS Miami, FL

July 26, 2021Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this areal flood advisory at Jul 26, 2021, 2:34 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 73 min.

The area

The counties it named.

The facts

Issued
Jul 26, 2021, 2:34 PM EDT (18:34 UTC)
Expired
Jul 26, 2021, 3:47 PM EDT
In force
73 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

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

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 6.6 hours before the alert went out and 20 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 2021-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 835 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 2021-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
835 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
984 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
10 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 areal flood advisory 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 areal flood advisory went out at Jul 26, 9:21 AM EDT, 5 hours 13 minutes earlier.

Area forecast discussion, Jul 26, 9:21 AM EDT, 5 hours 13 minutes before
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Hazardous weather outlook, Jul 26, 9:07 AM EDT, 5 hours 27 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
907 AM EDT Mon Jul 26 2021

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
270115-
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-
907 AM EDT Mon Jul 26 2021

...FLOOD WATCH IN EFFECT FOR MOST METRO AREAS OF SOUTH FLORIDA...
...SCATTERED TO NUMEROUS THUNDERSTORMS THIS AFTERNOON..

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Thunderstorms: Scattered to numerous showers and thunderstorms will
develop across most of South Florida. The primary impacts will be
lightning strikes, gusty winds, and locally heavy rainfall.

Flooding: Localized flooding is possible due to slow moving heavy
downpours from thunderstorms over low lying and poor drainage areas.
Highest chances of significant flooding will reside over metro areas
of South Florida.

Rip Currents: there is a moderate risk of rip currents for all the
Atlantic beaches.

Waterspouts: There is a slight chance of waterspouts over the local
South Florida waters.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Scattered to numerous showers and thunderstorms are possible until
mid week, then mainly scattered through the weekend. Frequent
lightning, heavy downpours, and gusty winds will be possible with the
strongest thunderstorms.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not anticipated, however individual
spotters are encouraged to report high wind, hail and flooding to
the National Weather Service forecast office in Miami.

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

In the hours before

Local storm report, Jul 26, 1:40 PM EDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
140 PM EDT MON JUL 26 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0132 PM     FLASH FLOOD      2 S PLANTATION          26.10N  80.25W
07/26/2021                   BROWARD            FL   PUBLIC

            STANDING WATER ON I-595 WESTBOUND JUST WEST OF
            UNIVERSITY DRIVE DUE TO HEAVY RAINFALL FROM
            THUNDERSTORMS.

&&

EVENT NUMBER MFL2100044

BNB

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 5:29 AM EDTAreal Flood AdvisoryMFLCollier3 hr
Jul 26, 1:20 PM EDTAreal Flood AdvisoryMFLBroward2 hr
Jul 26, 4:35 PM EDTSpecial Weather StatementMFLMonroe40 min

Nearby

Areal Flood Advisories in Florida, 2021Every areal flood advisory 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.