Alert archive / Florida / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 9, NWS Miami, FL

April 18, 2020Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 18, 2020, 3:08 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 66 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 18, 2020, 3:08 PM EDT (19:08 UTC)
Expired
Apr 18, 2020, 4:14 PM EDT
In force
66 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Possible
Hail
1.0 in
Wind
60.0 mph

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

The radar

The Miami radar (KAMX), 32 km from the middle of the area, began a volume at 19:10 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 7.1 hours before the alert went out and 6 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 2020-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 758 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 2020-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.19395878Sfc1 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
758 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
925 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
77 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.7

Open this sounding in Storm Lab

The text

As transmitted.

301 
WUUS52 KMFL 181908
SVRMFL
FLC011-086-182030-
/O.NEW.KMFL.SV.W.0009.200418T1908Z-200418T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
308 PM EDT Sat Apr 18 2020

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Northern Miami-Dade County in southeastern Florida...
  Southern Broward County in southeastern Florida...

* Until 430 PM EDT.

* At 308 PM EDT, severe thunderstorms were located along a line
  extending from 13 miles south of Intersection Alligator Alley And
  Miami Canal to near Lauderdale-By-The-Sea, moving southeast at 25
  mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Miami, Hialeah, Fort Lauderdale, Pembroke Pines and Hollywood. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Miami. You can also share your report with NWS Miami on
Facebook and Twitter.

&&

LAT...LON 2582 8004 2568 8007 2560 8068 2598 8084
      2609 8042 2617 8006 2583 8004
TIME...MOT...LOC 1908Z 335DEG 21KT 2596 8069 2616 8002 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
7 follow-up statements
940 
WWUS52 KMFL 181923
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
323 PM EDT Sat Apr 18 2020

FLC011-086-182030-
/O.CON.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-Broward FL-
323 PM EDT Sat Apr 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHERN MIAMI-DADE AND SOUTHERN BROWARD COUNTIES...

At 323 PM EDT, severe thunderstorms were located along a line
extending from 13 miles northwest of Miccosukee Resort to 8 miles
east of Hollywood, moving southeast at 25 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Miami, Hialeah, Pembroke Pines, Hollywood and Miramar. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2568 8008 2560 8068 2594 8082 2610 8006
      2582 8004
TIME...MOT...LOC 1923Z 334DEG 21KT 2591 8065 2606 7998 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
344 
WWUS52 KMFL 181938
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
338 PM EDT Sat Apr 18 2020

FLC011-181948-
/O.CAN.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Broward FL-
338 PM EDT Sat Apr 18 2020

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BROWARD COUNTY IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 2568 8008 2560 8067 2587 8073 2594 8063
      2596 8046 2596 8029 2597 8012 2596 8005
      2582 8004
TIME...MOT...LOC 1938Z 308DEG 24KT 2589 8047 2599 7994 

$$

FLC086-182030-
/O.CON.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-
338 PM EDT Sat Apr 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHERN MIAMI-DADE COUNTY...

At 338 PM EDT, severe thunderstorms were located along a line
extending from near Intersection Krome And U.S. 27 to 11 miles east
of Hallandale, moving southeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Miami, Hialeah, Miramar, Miami Beach and Coral Gables. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2568 8008 2560 8067 2587 8073 2594 8063
      2596 8046 2596 8029 2597 8012 2596 8005
      2582 8004
TIME...MOT...LOC 1938Z 308DEG 24KT 2589 8047 2599 7994 

HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
474 
WWUS52 KMFL 181949
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
349 PM EDT Sat Apr 18 2020

FLC086-182030-
/O.CON.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-
349 PM EDT Sat Apr 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHERN MIAMI-DADE COUNTY...

At 347 PM EDT, thunderstorms were located along a line extending 
from 13 miles northwest of Miccosukee Resort to 12 miles east of 
Hallandale, moving south at 20 mph. This activity has weakened 
during the past 15 to 20 minutes. However, radar and satellite 
imagery indicate potential thunderstorms redeveloping over northern 
Miami-Dade County, and this activity could intensify to severe 
levels during the duration of the Severe Thunderstorm Warning. As a 
result, the warning remains in effect.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Miami, Hialeah, Miramar, Miami Beach and Coral Gables. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2568 8008 2560 8067 2587 8073 2594 8063
      2596 8046 2596 8029 2597 8012 2596 8005
      2582 8004
TIME...MOT...LOC 1947Z 341DEG 16KT 2588 8066 2594 7992 

HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
815 
WWUS52 KMFL 181954
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
354 PM EDT Sat Apr 18 2020

FLC086-182030-
/O.CON.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-
354 PM EDT Sat Apr 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR NORTHERN MIAMI-DADE COUNTY...

At 353 PM EDT, thunderstorms were located along a line extending 
from near Miami International Airport to 13 miles east of Sunny 
Isles Beach, moving east at 30 mph. While this activity has 
weakened, it will have the potential to re-intensify to severe 
levels during the next half hour or so.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Miami, Hialeah, Miami Beach, Coral Gables and Key Biscayne. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2568 8008 2566 8025 2584 8029 2597 8008
      2596 8005 2582 8004
TIME...MOT...LOC 1953Z 283DEG 25KT 2579 8025 2593 7990 

HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
473 
WWUS52 KMFL 181959
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
359 PM EDT Sat Apr 18 2020

FLC086-182030-
/O.CON.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-
359 PM EDT Sat Apr 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CENTRAL MIAMI-DADE COUNTY...

At 359 PM EDT, severe thunderstorms were located along a line
extending from Coconut Grove to near Surfside, moving south at 15
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Miami, Miami Beach, Coral Gables, Key Biscayne and Virginia Key. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2568 8008 2566 8025 2576 8027 2585 8018
      2590 8005 2582 8004
TIME...MOT...LOC 1959Z 353DEG 13KT 2574 8027 2585 8004 

HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
893 
WWUS52 KMFL 182006
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
406 PM EDT Sat Apr 18 2020

FLC086-182030-
/O.CON.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-
406 PM EDT Sat Apr 18 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CENTRAL MIAMI-DADE COUNTY...

At 406 PM EDT, severe thunderstorms were located along a line
extending from Coral Gables to near Miami Beach, moving south at 25
mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Miami, Miami Beach, Coral Gables, Key Biscayne and Virginia Key. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2580 8004 2568 8008 2566 8025 2572 8026
      2581 8014 2584 8004
TIME...MOT...LOC 2006Z 339DEG 21KT 2570 8026 2581 8003 

HAIL...1.00IN
WIND...60MPH
 
$$

Cohen
870 
WWUS52 KMFL 182014
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
414 PM EDT Sat Apr 18 2020

FLC086-182023-
/O.CAN.KMFL.SV.W.0009.000000T0000Z-200418T2030Z/
Miami-Dade FL-
414 PM EDT Sat Apr 18 2020

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL MIAMI-DADE COUNTY IS
CANCELLED...
    
The storms which prompted the warning have weakened below severe
limits, and have exited the warned area. Therefore, the warning has 
been cancelled.  However, gusty winds and heavy rain are still 
possible with thunderstorms moving across the region through the 
afternoon hours.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Miami.

LAT...LON 2580 8004 2568 8008 2566 8025 2572 8026
      2581 8014 2584 8004
TIME...MOT...LOC 2012Z 335DEG 21KT 2567 8024 2578 8001 

$$

Cohen

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Apr 18, 2:36 PM EDT, 32 minutes earlier.

Area forecast discussion, Apr 18, 2:36 PM EDT, 32 minutes before
Area Forecast Discussion
National Weather Service Miami FL
236 PM EDT Sat Apr 18 2020

.Short Term...

Late Afternoon Through Sunday night...

A low amplitude wave, now evident in moisture channel imagery, will
progress through the Southeast CONUS this afternoon and evening. A
60 kt mid-level wind max will accompany the wave, as a thunderstorm
complex now over the eastern Gulf of Mexico moves across the Florida
Peninsula. Satellite derived precipitable water values this morning
show a reservoir of available moisture (values at or above 2 inches)
which will advect into the northern and eastern portions of the NWS
Miami CWA this afternoon. While the greatest mid-level height falls,
jet-level divergence, and cyclonic vorticity advection, and deep
layer shear will remain to our north (closer to the advancing
shortwave), there are a few factors suggesting that a severe weather
and/or flooding risk may exist across northern and eastern
portions of our area today. First, analysis of the 18.12z MFL
sounding suggests surface based instability is already on the
order of 1000 J/kg, with little inhibition. Capping aloft is
negligible with plentiful insolation, suggesting a favorable
environment for thunderstorm development with additional
warming/moistening today. While model forecast mid-level lapse
rates appear modest, heating within the lower troposphere is
forecast to boost low-level (0-3 km) lapse rates over 8 C/km this
afternoon. The aforementioned warming/moistening suggests
plentiful buoyancy today as MLCAPE rises to around 2 kJ/kg.
Additionally, a pinned east coast sea breeze should serve as a
low-level focus for ascent, with outflow boundaries providing an
additional focus after convective initiation. Given forecast
theta-E differentials and 900 J/kg of DCAPE strong to locally
damaging downburst winds appear to be a primary hazard with
sufficient precipitation loading taking place within the more
robust thunderstorm updrafts. Hail is also possible in the taller
cores. There is also a secondary (albeit more conditional) concern
for a tornado or two given potential boundary collisions along
with the localized backing of the low- level winds associated
with the sea breeze boundary. The areas most likely to see strong
to severe storms this afternoon appears to align well with the
recently updated Day 1 Outlook from the Storm Prediction Center,
which places a slight risk for severe thunderstorms across the
eastern half of Palm Beach County, with a marginal risk continuing
south across eastern Broward and into northeast Miami- Dade
Counties.

Given antecedent rainfall on the order of 2-3 inches over portions
of Palm Beach County, flooding is also a concern should convection
repeatedly affect any of these areas. The pinned sea breeze suggests
we'll also need to watch coastal/metro Broward and Miami-Dade
Counties for flooding potential as well.

Showers and thunderstorms should gradually diminsh over land
areas this evening as the upper wave departs, but may continue for
a time over the Atlantic waters tonight. Patchy fog is possible
over inland areas late tonight into Sunday morning.

Warm weather continues on Sunday, with highs in the 90s away from
the coasts. Scattered showers and a few thunderstorms are possible,
with the greatest chances from the Lake region towards Palm Beach
County.

.Long Term...
Monday through Friday night...

Monday will start off with a 500mb short wave well to the north of
the area. Associated with this short wave is a surface low, which
should be off the Mid-Atlantic coast by Monday at 12z. A cold
front associated with this low should be stretched back to the
east southeast, over Central Florida. just ahead of this front,
the models are showing the weather to be quiet the first half
Monday. As the front slides to the south, showers and
thunderstorms moving into the wester lake region by Monday
afternoon.

The front continues to push south Monday night, allowing for more
widespread chance PoPs for Monday night. On Tuesday, the front
stalls somewhere over South Florida, but begins to wash out, as
the actual low moves well away from the CONUS. This would allow
for some chance PoPs, especially over the eastern half of the CWA
on Tuesday. By Tuesday night, high pressure builds to the north,
allowing for quieter weather Tuesday night through Thursday
morning.

Thursday morning will see a 500 mb short wave moving well north of
the area once again. At the surface, an area of low pressure is
associated with the short wave. This will push the high well to
the east, allowing for a more unstable atmosphere over South
Florida for Thursday, allowing for some slight chance PoPs for
much of South Florida on Thursday. Thursday night, a surface
trough, ahead of the cold front, develops, and moves into the
area. This could potentially keep showers and thunderstorms going
through the overnight hours and into early Friday morning.

&&

.Marine...

Scattered showers and thunderstorms are expected over the local
waters today and remain possible on Sunday. Lightning, strong gusty
winds, and waterspouts are possible with these storms. Cautionary to
hazardous marine conditions are possible by early next week as winds
and seas increase.

&&

.Aviation (18Z TAFS)...

Shower/thunderstorm chances increasing for the eastern terminals
through 22-23z, then decreasing. Gusty and erratic winds, along
with sub-VFR conditions expected if a storm directly impacts a
terminal. Outside of this mainly SSW winds, but the near-coast
sites could briefly see SSE with the sea breeze just slightly
inland at the moment. Rain chances diminish tonight with winds
becoming more SSE on Sunday.

&&

.Beach Forecast...

There is a moderate risk for rip currents for the Palm Beaches
today. Showers and thunderstorms are likely for the Atlantic beaches
today with strong winds and lightning possible.

&&

.Preliminary Point Temps/PoPs...
West Palm Beach  73  90  75  92 /  30   0  10  10
Fort Lauderdale  77  88  78  92 /  30   0  10  10
Miami            75  91  77  92 /  30   0  10  10
Naples           73  89  77  88 /   0   0  10  20

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...None.
AM...None.
GM...None.
&&

Short Term and Aviation/Beaches/Marine...34/SPM
Long Term...13
Hazardous weather outlook, Apr 18, 7:57 AM EDT, 7 hours 11 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
757 AM EDT Sat Apr 18 2020

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
190000-
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-
757 AM EDT Sat Apr 18 2020

...Flooding Possible East Coast Metro Areas...
..A Few Severe Thunderstorms Possible...

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Flooding: flooding of urban and poorly drained areas is possible this
afternoon and evening for the east coast metro areas. The greatest
risk is across Palm Beach County where heavy rain fell recently.
Although uncertain, flash flooding is also possible, with the
greatest risk for this being across Palm Beach County.

Wind: strong to locally damaging wind gusts up to 60 mph are
possible this afternoon. The greatest risk for this is across Palm
Beach, Broward, and northern Miami-Dade Counties.

Tornadoes: a tornado is possible this afternoon, with the greatest
risk across Palm Beach, Broward, and northern Miami-Dade Counties.

Rip Currents: There is a moderate risk of rip currents along the
beaches of Palm Beach County this morning.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Patchy fog will be possible early Sunday across the interior
portions of south Florida.

There is a low chance of thunderstorms over South Florida Sunday
along the Sea or Gulf Breezes and again early next week with another
cold frontal passage.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this afternoon. 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

Special weather statement, Apr 18, 1:53 PM EDT, 1 hour 15 minutes before
Special Weather Statement
National Weather Service Miami FL
153 PM EDT Sat Apr 18 2020

FLZ066>068-070>072-168-172-181900-
Inland Broward County FL-Hendry FL-Coastal Broward County FL-
Coastal Palm Beach County FL-Inland Collier County FL-
Metro Broward County FL-Inland Palm Beach County FL-
Metro Palm Beach County FL-
153 PM EDT Sat Apr 18 2020

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN COLLIER...SOUTHEASTERN
HENDRY...NORTHERN BROWARD AND PALM BEACH COUNTIES UNTIL 300 PM EDT...

* At 152 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from Port Of
  Palm Beach to 8 miles east of Okeelanta to near Rotenberger
  Wildlife Refuge. Movement was east at 30 mph.

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

* Locations impacted include...
  Fort Lauderdale, Coral Springs, West Palm Beach, Pompano Beach,
  Sunrise, Boca Raton, Deerfield Beach, Boynton Beach, Delray Beach,
  Tamarac, Wellington, Jupiter, Margate, Palm Beach Gardens, Lake
  Worth, Riviera Beach, Belle Glade, Lighthouse Point, Palm Beach and
  Clewiston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2697 8003 2617 8003 2618 8096 2671 8097
      2681 8083 2679 8082 2680 8081 2697 8061
      2696 8061 2696 8014 2697 8014
TIME...MOT...LOC 1752Z 263DEG 26KT 2675 8006 2656 8058 2633 8085

Weinman
Special weather statement, Apr 18, 2:35 PM EDT, 33 minutes before
Special Weather Statement
National Weather Service Miami FL
235 PM EDT Sat Apr 18 2020

FLZ173-181900-
Coastal Miami Dade County FL-
235 PM EDT Sat Apr 18 2020

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MIAMI-DADE COUNTY UNTIL
300 PM EDT...

* At 235 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm over Palmetto Bay, or near Black
  Point, moving southeast at 10 mph.

* Small hail, funnel clouds, and wind gusts of 50 to 55 mph possible
  with this storm.

* Locations impacted include...
  Coral Gables, Black Point, Pinecrest, Palmetto Bay and Cutler Bay.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2564 8008 2560 8013 2553 8009 2545 8012
      2544 8021 2552 8035 2566 8032 2567 8008
TIME...MOT...LOC 1835Z 318DEG 10KT 2559 8032

Cohen
Special weather statement, Apr 18, 2:42 PM EDT, 26 minutes before
Special Weather Statement
National Weather Service Miami FL
242 PM EDT Sat Apr 18 2020

FLZ070>073-172-181945-
Inland Broward County FL-Coastal Broward County FL-
Inland Collier County FL-Metro Broward County FL-Inland Miami-
Dade County FL-
242 PM EDT Sat Apr 18 2020

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

* At 241 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from 7 miles
  south of Miccosukee Service Plaza to Margate. Movement was east at
  20 mph.

* Small hail, funnel clouds, and winds in excess of 45 mph possible
  with these storms.

* Locations impacted include...
  Fort Lauderdale, Pembroke Pines, Hollywood, Miramar, Coral Springs,
  Pompano Beach, Davie, Plantation, Sunrise, Deerfield Beach,
  Tamarac, Margate, Lighthouse Point, Lauderdale-By-The-Sea,
  Hallandale, Miami Gardens, Lauderhill, Weston, Coconut Creek and
  Oakland Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2597 8005 2597 8029 2596 8034 2593 8038
      2588 8039 2585 8079 2604 8087 2610 8088
      2616 8077 2630 8005
TIME...MOT...LOC 1841Z 281DEG 18KT 2607 8081 2625 8021

Cohen
Special weather statement, Apr 18, 2:58 PM EDT, 10 minutes before
Special Weather Statement
National Weather Service Miami FL
258 PM EDT Sat Apr 18 2020

FLZ066>068-070>072-168-172-181945-
Inland Broward County FL-Hendry FL-Coastal Broward County FL-
Coastal Palm Beach County FL-Inland Collier County FL-
Metro Broward County FL-Inland Palm Beach County FL-
Metro Palm Beach County FL-
258 PM EDT Sat Apr 18 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN BROWARD AND PALM BEACH
COUNTIES UNTIL 345 PM EDT...

* At 257 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from Downtown
  West Palm Beach to near Parkland to 9 miles south of Holey Land
  Wildlife Refuge. Movement was east at 35 mph.

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

* Locations impacted include...
  Coral Springs, West Palm Beach, Pompano Beach, Boca Raton,
  Deerfield Beach, Boynton Beach, Delray Beach, Tamarac, Wellington,
  Jupiter, Margate, Palm Beach Gardens, Lake Worth, Riviera Beach,
  Lighthouse Point, Palm Beach, Tequesta, Highland Beach, Juno Beach
  and Ocean Ridge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2627 8003 2610 8088 2639 8088 2651 8062
      2696 8041 2696 8014 2697 8014 2697 8003
TIME...MOT...LOC 1857Z 263DEG 32KT 2670 8004 2634 8032 2629 8071

Weinman
Special weather statement, Apr 18, 3:05 PM EDT, 3 minutes before
Special Weather Statement
National Weather Service Miami FL
305 PM EDT Sat Apr 18 2020

FLZ074-173-181930-
Metropolitan Miami Dade FL-Coastal Miami Dade County FL-
305 PM EDT Sat Apr 18 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MIAMI-DADE COUNTY UNTIL
330 PM EDT...

* At 305 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from 7 miles
  northwest of Intersection Krome And U.S. 27 to Chula Vista.
  Movement was east at 30 mph.

* Small hail, funnel clouds, and wind gusts of 50 to 55 mph possible
  with these storms.

* Locations impacted include...
  Miami, Hialeah, Miramar, Miami Beach, Surfside, Hallandale, Miami
  Gardens, North Miami, North Miami Beach, Aventura, Miami Lakes,
  Hialeah Gardens, Sunny Isles Beach, Opa-Locka, Miami Shores, North
  Bay Village, El Portal, Medley, Westview and Palm Springs North.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2596 8003 2586 8004 2583 8004 2588 8039
      2590 8039 2593 8038 2596 8034 2596 8030
      2597 8029 2597 8012 2599 8012 2599 8011
TIME...MOT...LOC 1905Z 284DEG 27KT 2601 8053 2610 8017

Cohen

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 17, 8:03 PM EDTSpecial Weather StatementMFLPalm Beach57 min
Apr 17, 8:08 PM EDTSpecial Weather StatementMFLGlades52 min
Apr 17, 8:22 PM EDTSpecial Weather StatementMFLGlades53 min
Apr 17, 8:47 PM EDTAreal Flood AdvisoryMFLPalm Beach3 hr
Apr 17, 10:10 PM EDTAreal Flood AdvisoryMFLPalm Beach2 hr
Apr 17, 10:26 PM EDTSpecial Marine WarningMFL64 min
Apr 17, 10:56 PM EDTSpecial Weather StatementMFLPalm Beach64 min
Apr 17, 11:12 PM EDTSpecial Marine WarningMFL63 min
Apr 18, 12:03 AM EDTSpecial Weather StatementMFLPalm Beach57 min
Apr 18, 12:12 AM EDTSpecial Marine WarningMFL63 min
Apr 18, 1:13 AM EDTSpecial Marine WarningMFL62 min
Apr 18, 2:12 AM EDTSpecial Marine WarningMFL63 min
Apr 18, 1:53 PM EDTSpecial Weather StatementMFLBroward, Palm Beach67 min
Apr 18, 2:29 PM EDTSpecial Marine WarningMFL83 min
Apr 18, 2:34 PM EDTSpecial Marine WarningMFL116 min
Apr 18, 2:35 PM EDTSpecial Weather StatementMFLMiami-Dade25 min
Apr 18, 2:42 PM EDTSpecial Weather StatementMFLBroward63 min
Apr 18, 2:53 PM EDTSpecial Marine WarningMFL97 min
Apr 18, 2:58 PM EDTSpecial Weather StatementMFLBroward, Palm Beach47 min
Apr 18, 3:05 PM EDTSpecial Weather StatementMFLBroward25 min
Apr 18, 4:15 PM EDTSpecial Marine WarningMFL2 hr
Apr 18, 6:14 PM EDTSpecial Marine WarningMFL61 min

Nearby

Severe Thunderstorm Warnings in Florida, 2020Every severe thunderstorm warning 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.