Special Weather Statement, NWS Miami, FL

Area Forecast Discussion
National Weather Service Miami FL
Issued by National Weather Service Austin/San Antonio TX
133 PM EDT Mon Jul 5 2021

.AVIATION(18Z TAFS)...
After a lull in convection this morning scattered showers and
thunderstorms have develop to the east of APF/Naples early this
afternoon. The next band of precipitation from Elsa is also
approaching from the south and is currently moving through the
Keys. This should arrive at TMB/MIA/OPF between 18z and 19z and
continue to move north through the afternoon. Have added a TEMPO
group at all terminals to reflect this precipitation through about
23z this afternoon. Heavier rain showers and thunderstorms will
temporarily drop visibility to MVFR and possibly IFR levels. Some
sort term AMDs may be needed.

Beyond this afternoon confidence in the timing of convection
decreases as higher resolution models differ on the timing and
placement of the next band of convection from Elsa late tonight
and then what to do with the storm once it moves closer to
Florida. Have gone with the consensus and added another TEMPO
group from around 03z to 07z tonight as the HRRR and other models
show vonection along the east coast during those hours. Given the
uncertainty in specifics, but the high likelihood of precipitation
have just broad brushed TSRA beginning at 12z Tuesday morning for
all of the South Florida terminals. Later TAF packages can further
refine the timing. Winds will generally be out of the south and
southeast and begin to get gusty later on today and into Tuesday.

&&

.PREV DISCUSSION... (Issued 953 AM EDT Mon Jul 5 2021)

UPDATE...
Short Term Key Points:

* A few strong to locally severe thunderstorms will be possible
  across South Florida this afternoon into the evening hours, with
  the primary concern being isolated damaging wind gusts. Present
  indications are that this risk may be highest across the northern
  portions of South Florida.

* Localized flash flooding from repeated rounds of heavy rainfall
  will be possible across South Florida, especially along the
  coastal/metro areas. Initially, this risk appears to be greatest
  across coastal/metro Collier County, with the risk increasing
  for the east coast metros during the overnight/morning hours.

* A couple tornadoes will be possible across South Florida, with the
  greatest threat across the southern and western portions of the
  area this evening into Tuesday.

Mid-level water vapor imagery and GOES-16 derived precipitable water
depict a gradient in deep-layer moisture across South Florida, with
PW values greater than 2 inches evident across the southern and
eastern portions of the area. To the north-northwest of this
gradient, partly cloudy skies will allow for efficient diurnal
destabilization of a moist boundary layer (e.g., upper 70s
dewpoints), which combined with increasing large-scale forcing on
the periphery of Elsa and strengthening low-level wind fields will
support a few strong to locally severe multicell clusters capable of
producing damaging wind gusts.

As the deep-layer moisture continues to overspread South Florida in
association with Elsa, the thermodynamic environment will become
increasingly favorable for heavy-rainfall-producing convection --
owing to tall skinny CAPE profiles, deep warm cloud layers, and
repeated rounds of showers and storms. The threat of localized flash
flooding from heavy rainfall will be greatest across metro areas
that experience repeated rounds of showers and storms, and this
seems most likely across the Gulf Coast of South Florida initially,
with the threat gradually increasing across the east coast metros
overnight owing to coastal convergence and related mesoscale ascent.

Finally, the risk of a couple tornadoes will gradually increase
across South Florida later today into tomorrow, and this risk
appears greatest across the southern and western portions of South
Florida -- where the strongest 850-mb flow will support enlarged low-
level hodographs and enhanced effective-layer storm relative
helicity supportive of isolated rotating updrafts.

PREV DISCUSSION... (Issued 734 AM EDT Mon Jul 5 2021)

AVIATION(12Z TAFS)...
Deteriorating sub-VFR conditions through the TAF period with the
approach of Elsa. A morning to afternoon round of convection could
impact the terminals from east to west, hence the MVFR TEMPOs. A
lull from east to west is possible from late afternoon to early
overnight with activity returning from the Atlantic late evening
and spreading westward overnight. APF will likely deteriorate to
IFR/LIFR as Elsa passes in the Gulf. Short-fused AMDs likely.

MARINE...

A few showers and thunderstorms with East/southeast flow
over the Atlantic waters, with west/northwest flow over the Gulf
waters. By early Monday morning, conditions are expected to
deteriorate over the local waters as Tropical Storm Elsa steers
towards the Florida Straits.

HYDROLOGY...

Tropical Storm Elsa will bring periods of heavy rainfall to the
region early this week. Storm total amounts of 3 to 5 inches are
possible, with isolated heavier amounts. The greatest heavy rain
potential should be across Southwest Florida and the Gulf coast
region starting later today into tonight. A Flood Watch may be
necessary for this area later today depending upon how forecast
trends evolve.

BEACHES...

Warm, oppressive conditions are expected across the local beaches
today, as heat indices soar above 100 degrees and possibly up to 105
in some areas. Rip current activity may increase in association with
the approach of Tropical Storm Elsa.

&&

.PRELIMINARY POINT TEMPS/POPS...
Miami            79  86  79  90 /  60  70  30  40
West Kendall     77  86  78  91 /  60  70  30  40
Opa-Locka        77  86  78  90 /  50  70  30  40
Homestead        77  86  78  89 /  60  60  30  40
Fort Lauderdale  78  86  78  89 /  50  60  30  40
N Ft Lauderdale  78  86  78  89 /  50  70  30  40
Pembroke Pines   77  86  77  89 /  50  70  30  40
West Palm Beach  78  86  78  89 /  50  60  40  50
Boca Raton       78  87  78  89 /  50  60  30  40
Naples           76  85  77  90 /  70  80  50  50

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...Flood Watch through Tuesday evening for FLZ069-070.

     Tropical Storm Warning for FLZ069-075.

     High Rip Current Risk through Wednesday evening for FLZ172-173.

AM...Small Craft Advisory until 7 AM EDT Tuesday for AMZ630-651-671.

GM...Tropical Storm Warning for GMZ656-657-676.

&&

Update/Aviation...Treadway/EWX

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Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
1130 AM EDT Mon Jul 5 2021

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
060330-
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-
1130 AM EDT Mon Jul 5 2021

...Tropical Storm Elsa To Impact The Region with Multiple Hazards...

This hazardous weather outlook is for South Florida.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Tropical Storm Elsa will impact the region. Gusty winds, heavy rains,
coastal flooding and a few tornadoes are possible, especially
overnight tonight.

Hazardous marine and beach conditions are expected with a high rip
current risk.

Please reference the Hurricane Local Statement from NWS Miami for
additional detailed information.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Impact from Elsa will likely continue through mid-week. Residents
and visitors are urged to monitor updates to the forecast for Elsa,
and ensure that Hurricane preparedness plans are in place.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated, however, individual spotters
are encouraged to report high wind 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.

Special Weather Statement
National Weather Service Miami FL
103 PM EDT Mon Jul 5 2021

FLZ073-075-173-174-051745-
Mainland Monroe FL-Far South Miami-Dade County FL-Inland Miami-
Dade County FL-Coastal Miami Dade County FL-
103 PM EDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN MIAMI-DADE COUNTY UNTIL
145 PM EDT...

* At 102 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from 8 miles
  northwest of West End Of Channel 5 Bridge to near Plantation to 49
  miles southeast of Rock Harbor. Movement was northwest at 20 mph.

* Winds in excess of 45 mph and funnel clouds possible with these
  storms.

* Locations impacted include...
  Homestead, Turkey Point, Homestead Miami Speedway, Florida City,
  Royal Palm Ranger, Mahogany Hammock, Homestead Bayfront Park,
  Homestead Base and Everglades National Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

Persons participating in outdoor activities should seek sturdy
shelter until these storms pass. Open shelters found in parks,
beaches, or golf courses offer no protection from the dangers of
lightning.

&&

LAT...LON 2515 8077 2518 8080 2518 8086 2540 8087
      2554 8011 2529 8020 2535 8027 2530 8039
      2520 8050 2522 8057 2523 8054 2523 8052
      2524 8054 2523 8059 2520 8058 2514 8067
      2516 8065 2516 8068 2514 8078
TIME...MOT...LOC 1702Z 150DEG 19KT 2494 8085 2501 8059 2453 7995

RAG

Special Weather Statement
National Weather Service Miami FL
126 PM EDT Mon Jul 5 2021

FLZ063-066-051800-
Hendry FL-Glades FL-
126 PM EDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HENDRY AND
SOUTHWESTERN GLADES COUNTIES UNTIL 200 PM EDT...

* At 126 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm near Labelle, moving northwest at 20
  mph.

* Winds in excess of 45 mph and funnel clouds possible with this
  storm.

* Locations impacted include...
  Labelle, Port La Belle and Muse.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

&&

LAT...LON 2702 8148 2670 8129 2654 8155 2656 8157
      2695 8156
TIME...MOT...LOC 1726Z 135DEG 16KT 2669 8148

RAG

Special Weather Statement
National Weather Service Miami FL
143 PM EDT Mon Jul 5 2021

FLZ069-070-073>075-173-174-051845-
Coastal Collier County FL-Inland Collier County FL-
Mainland Monroe FL-Metropolitan Miami Dade FL-Far South Miami-
Dade County FL-Inland Miami-Dade County FL-
Coastal Miami Dade County FL-
143 PM EDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN COLLIER...MAINLAND
MONROE AND MIAMI-DADE COUNTIES UNTIL 245 PM EDT...

* At 142 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from 6 miles
  southwest of Mahogany Hammock to 7 miles south of Royal Palm Ranger
  to near Route 1/card Sound to 19 miles southeast of Route 1/card
  Sound Road Split. Movement was northwest at 40 mph.

* Winds in excess of 45 mph and funnel clouds possible with these
  storms.

* Locations impacted include...
  Miami, Hialeah, Miami Beach, Homestead, Coral Gables, Key Biscayne,
  South Miami, Chokoloskee, Homestead Miami Speedway, Black Point,
  Homestead General Airport, Flamingo, The Redland, Turkey Point,
  Virginia Key, Everglades City, Kendall, Doral, Hialeah Gardens and
  Pinecrest.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

&&

LAT...LON 2530 8018 2535 8027 2520 8050 2523 8059
      2514 8066 2514 8067 2516 8065 2514 8078
      2518 8081 2514 8094 2517 8106 2535 8121
      2565 8136 2573 8134 2579 8144 2577 8153
      2584 8161 2595 8065 2581 8004
TIME...MOT...LOC 1742Z 147DEG 33KT 2528 8092 2528 8062 2519 8031 2500
8013

RAG

Special Weather Statement
National Weather Service Miami FL
150 PM EDT Mon Jul 5 2021

FLZ063-066-051830-
Hendry FL-Glades FL-
150 PM EDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN HENDRY AND
SOUTHWESTERN GLADES COUNTIES UNTIL 230 PM EDT...

* At 150 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from near
  Palmdale to 9 miles south of Venus to Muse. Movement was northwest
  at 15 mph.

* Winds in excess of 45 mph and funnel clouds possible with these
  storms.

* Locations impacted include...
  Palmdale and Muse.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

&&

LAT...LON 2686 8112 2687 8134 2671 8152 2675 8157
      2703 8156 2703 8134 2704 8134 2704 8133
      2703 8133 2703 8127 2712 8127
TIME...MOT...LOC 1750Z 141DEG 12KT 2692 8125 2693 8139 2682 8152

RAG

Special Weather Statement
National Weather Service Miami FL
216 PM EDT Mon Jul 5 2021

FLZ063-066-067-069-070-051900-
Coastal Collier County FL-Hendry FL-Inland Collier County FL-
Inland Palm Beach County FL-Glades FL-
216 PM EDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN COLLIER...HENDRY...
WEST CENTRAL PALM BEACH AND SOUTHEAST GLADES COUNTIES UNTIL 300 PM
EDT...

* At 215 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from near Lake
  Harbor to East Naples. Movement was north at 20 mph.

* Winds in excess of 45 mph and funnel clouds possible with these
  storms.

* Locations impacted include...
  Naples, Belle Glade, Clewiston, South Bay, Moore Haven, Ave Maria,
  Lake Harbor, Golden Gate Estates, Montura, Immokalee, Belle Meade,
  Orangetree, Belle Glade Camp, Golden Gate, East Naples, Lely
  Resort, Hendry Correctional, Devils Garden, Big Corkscrew Island
  and Vineyards.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

&&

LAT...LON 2633 8184 2632 8166 2642 8166 2642 8156
      2659 8156 2691 8101 2688 8091 2679 8082
      2687 8074 2659 8058 2596 8183
TIME...MOT...LOC 1815Z 164DEG 16KT 2662 8086 2613 8174

RAG

Special Weather Statement
National Weather Service Miami FL
239 PM EDT Mon Jul 5 2021

FLZ071>074-172>174-051945-
Inland Broward County FL-Coastal Broward County FL-
Metro Broward County FL-Metropolitan Miami Dade FL-Far South Miami-
Dade County FL-Inland Miami-Dade County FL-
Coastal Miami Dade County FL-
239 PM EDT Mon Jul 5 2021

...SIGNIFICANT WEATHER ADVISORY FOR MIAMI-DADE AND SOUTHERN BROWARD
COUNTIES UNTIL 345 PM EDT...

* At 238 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from 12 miles
  southeast of Ocean Reef to 33 miles east of Fisher Island. Movement
  was north at 35 mph.

* Wind gusts of 50 to 55 mph possible with these storms.

* Locations impacted include...
  Miami, Hialeah, Fort Lauderdale, Pembroke Pines, Hollywood,
  Miramar, Pompano Beach, Davie, Miami Beach, Plantation, Sunrise,
  Homestead, Tamarac, Margate, Coral Gables, Key Biscayne, South
  Miami, Lauderdale-By-The-Sea, Surfside and Homestead General
  Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Persons participating in outdoor activities should seek sturdy
shelter until these storms pass. Open shelters found in parks,
beaches, or golf courses offer no protection from the dangers of
lightning.

&&

LAT...LON 2624 8009 2582 8004 2564 8008 2560 8013
      2552 8009 2530 8018 2528 8020 2535 8027
      2529 8033 2529 8039 2530 8039 2520 8050
      2522 8057 2523 8054 2523 8052 2524 8054
      2523 8059 2518 8062 2616 8069
TIME...MOT...LOC 1838Z 168DEG 30KT 2518 8015 2559 7964

RAG