Alert archive / Florida / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 21, NWS Miami, FL

April 30, 2020Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 30, 2020, 1:42 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 48 min. 16 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 30, 2020, 1:42 PM EDT (17:42 UTC)
Expired
Apr 30, 2020, 2:30 PM EDT
In force
48 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
70.0 mph

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

The radar

The Miami radar (KAMX), 30 km from the middle of the area, began a volume at 17:44 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.

What was reported inside it

TimeReportWhereRemark
Apr 30, 1:48 PM EDTTSTM WND GST 473 Ese Miramar, FLMESONET STATION XFLM FLAMINGO.
Apr 30, 1:55 PM EDTTSTM WND GST 44Miami Internationa, FLASOS STATION KMIA MIAMI.
Apr 30, 1:55 PM EDTTSTM WND GST 661 Ese Miami Internation, FLMIAMI INTERNATIONAL AIRPORT-SOUTH TERMINAL ON EARTHNETWORKS
Apr 30, 1:55 PM EDTTSTM WND GST 661 Ese Miami Internation, FLMIAMI INTERNATIONAL AIRPORT-SOUTH TERMINAL ON EARTHNETWORKS.
Apr 30, 2:00 PM EDTTSTM WND DMG2 S Liberty City, FLSOCIAL MEDIA INDICATES LARGE, ROD-SUPPORTED, OUTDOORS SHELTER UNIT FLIPPED OVER AND DAMAGED IN BACKYARD OF A MEMBER OF THE PUBLIC NEAR INTERSECTION OF NORTHWEST 24TH STREET AND NORTHWEST 17TH AVENUE.
Apr 30, 2:00 PM EDTTSTM WND GST 431 Ssw Coral Gables, FLMESONET STATION 0081W 1.0 SW CORAL GABLES (WEATHERSTEM).
Apr 30, 2:03 PM EDTTSTM WND DMG1 Nnw Hialeah, FLDELAYED REPORT. LARGE TREE LIMB SNAPPED AND RESTING OVER ADJACENT FENCE, IN ASSOCIATION WITH THUNDERSTORMS THAT MOVED THROUGH THE HIALEAH AREA YESTERDAY. REPORT RECEIVED VIA SOCIAL MEDIA.
Apr 30, 2:05 PM EDTTSTM WND DMG1 Wnw Liberty City, FLDELAYED REPORT. PATIO-AREA TALL METAL ENCLOSURE, ASSOCIATED COVERING, AND ANCILLARY ITEMS TOPPLED AND DAMAGED IN ASSOCIATION WITH A CLUSTER OF SEVERE THUNDERSTORMS THAT MOVED THROUGH THE MIAMI AREA YESTERDAY. LOCATION IS NEAR INTERSECTION OF NW 64TH STREET AND
Apr 30, 2:10 PM EDTTSTM WND GST 601 Ene Miami, FLNATIONAL WEATHER SERVICE METEOROLOGIST ESTIMATES WINDS AT LEAST 60 MPH ON BISCAYNE BOULEVARD ACROSS THE STREET FROM AMERICAN AIRLINES ARENA.
Apr 30, 2:10 PM EDTTSTM WND GST 601 Ne Miami, FLNATIONAL WEATHER SERVICE STORM SURVEY REVEALS SPORADIC, GENERALLY MINOR DAMAGE AROUND BISCAYNE BOULEVARD NEAR AMERICAN AIRLINES ARENA FROM THUNDERSTORMS. THIS INCLUDES AN ELECTRONIC ROADSIDE BILLBOARD BLOWN OVER, WITH ANCILLARY ITEMS PREVIOUSLY SCATTERED ABOUT
Apr 30, 2:10 PM EDTTSTM WND GST 601 Nne Miami, FLUPDATED: NATIONAL WEATHER SERVICE STORM SURVEY REVEALS SPORADIC, GENERALLY MINOR WIND DAMAGE AROUND BISCAYNE BOULEVARD NEAR AMERICAN AIRLINES ARENA FROM THUNDERSTORMS. THIS INCLUDES AN ELECTRONIC ROADSIDE BILLBOARD BLOWN OVER, WITH ANCILLARY ITEMS PREVIOUSLY S
Apr 30, 2:10 PM EDTTSTM WND GST 621 Nne Miami, FLMEASURED THUNDERSTORM WIND GUST OF 62 MPH AT FROST MUSEUM IN DOWNTOWN MIAMI, IN PROXIMITY TO AMERICAN AIRLINES ARENA, WITH EARLIER SEVERE THUNDERSTORMS THAT CROSSED MIAMI. THE INSTRUMENT IS ELEVATED ON TOP OF THE BUILDING, AROUND 60 TO 70 FEET ABOVE GROUND LEV
Apr 30, 2:10 PM EDTTSTM WND GST 621 Nne Miami, FLUPDATES PREVIOUS TSTM WND GST REPORT FROM 1 NNE MIAMI. MEASURED THUNDERSTORM WIND GUST OF 62 MPH AT FROST MUSEUM IN DOWNTOWN MIAMI, IN PROXIMITY TO AMERICAN AIRLINES ARENA, WITH EARLIER SEVERE THUNDERSTORMS THAT CROSSED MIAMI. THE INSTRUMENT IS ELEVATED ON TOP
Apr 30, 2:13 PM EDTTSTM WND DMG1 Ene Miami, FLROADSIDE-DISPLAY UNIT AND ANCILLARY ITEMS BLOWN OVER AND DISAGGREGATED ON BISCAYNE BOULEVARD ACROSS THE STREET FROM AMERICAN AIRLINES ARENA.
Apr 30, 2:13 PM EDTMARINE TSTM WIND 442 S Miami Beach, FLCITY OF MIAMI BEACH ON EARTHNETWORKS
Apr 30, 2:13 PM EDTMARINE TSTM WIND 442 S Miami Beach, FLCITY OF MIAMI BEACH ON EARTHNETWORKS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 5.7 hours before the alert went out and 17 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 2020-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 957 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2020-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 88 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
957 J/kg
Mixed-layer CIN
-25 J/kg
Mixed-layer LCL
1010 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
88 m²/s²
0-3 km storm-relative helicity
88 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.5

Open this sounding in Storm Lab

The text

As transmitted.

121 
WUUS52 KMFL 301742
SVRMFL
FLC011-086-301830-
/O.NEW.KMFL.SV.W.0021.200430T1742Z-200430T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
142 PM EDT Thu Apr 30 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 230 PM EDT.

* At 142 PM EDT, severe thunderstorms were located along a line
  extending from near Intersection Krome And U.S. 27 to near Tamiami
  to The Redland, moving east at 35 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* 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.

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

&&

LAT...LON 2585 8003 2584 8004 2564 8008 2560 8013
      2553 8009 2545 8012 2551 8039 2577 8033
      2598 8038 2605 8004
TIME...MOT...LOC 1742Z 283DEG 29KT 2602 8045 2579 8041 2553 8050 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

MM
2 follow-up statements
932 
WWUS52 KMFL 301807
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
207 PM EDT Thu Apr 30 2020

FLC011-086-301830-
/O.CON.KMFL.SV.W.0021.000000T0000Z-200430T1830Z/
Miami-Dade FL-Broward FL-
207 PM EDT Thu Apr 30 2020

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM EDT
FOR NORTHERN MIAMI-DADE AND SOUTHERN BROWARD COUNTIES...

At 207 PM EDT, severe thunderstorms were located along a line
extending from Miramar Parkway And University Drive to Coconut Grove 
to near Black Point, moving east at 20 mph. Winds in excess of 60 
mph are ongoing. 

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...National Weather Service Employee.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

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.

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

&&

LAT...LON 2585 8003 2584 8004 2564 8008 2560 8013
      2553 8009 2545 8012 2551 8039 2577 8033
      2598 8038 2605 8004
TIME...MOT...LOC 1807Z 266DEG 19KT 2598 8027 2575 8023 2549 8032 

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...70MPH
 
$$

MM
245 
WWUS52 KMFL 301830
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
230 PM EDT Thu Apr 30 2020

FLC011-086-301840-
/O.EXP.KMFL.SV.W.0021.000000T0000Z-200430T1830Z/
Miami-Dade FL-Broward FL-
230 PM EDT Thu Apr 30 2020

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN MIAMI-DADE AND
SOUTHERN BROWARD COUNTIES HAS EXPIRED...
    
The storms which prompted the warning have moved out of the area.
Therefore, the warning has been allowed to expire.  However gusty 
winds and heavy rain are still possible with heavy showers moving 
through the area.

LAT...LON 2585 8003 2584 8004 2564 8008 2560 8013
      2553 8009 2545 8012 2551 8039 2577 8033
      2598 8038 2605 8004
TIME...MOT...LOC 1830Z 283DEG 29KT 2598 8027 2575 8023 2549 8032 

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 7:25 AM EDTSpecial Marine WarningMFL65 min
Apr 30, 7:48 AM EDTSpecial Weather StatementMFLCollier57 min
Apr 30, 8:22 AM EDTSpecial Marine WarningMFL68 min
Apr 30, 8:34 AM EDTSpecial Weather StatementMFLCollier, Glades, Hendry56 min
Apr 30, 8:59 AM EDTSpecial Marine WarningMFL61 min
Apr 30, 9:17 AM EDTSpecial Weather StatementMFLHendry, Palm Beach88 min
Apr 30, 9:40 AM EDTSpecial Marine WarningMFL95 min
Apr 30, 9:57 AM EDTSpecial Marine WarningMFL33 min
Apr 30, 10:03 AM EDTSpecial Weather StatementMFLPalm Beach72 min
Apr 30, 10:26 AM EDTSpecial Marine WarningMFL94 min
Apr 30, 10:39 AM EDTSpecial Marine WarningMFL96 min
Apr 30, 11:14 AM EDTSpecial Weather StatementMFLCollier46 min
Apr 30, 11:50 AM EDTSpecial Weather StatementMFLCollier40 min
Apr 30, 12:01 PM EDTSevere Thunderstorm WarningMFLBroward, Collier, Hendry17 min
Apr 30, 12:05 PM EDTSpecial Marine WarningMFL55 min
Apr 30, 12:09 PM EDTSpecial Weather StatementMFLCollier51 min
Apr 30, 12:13 PM EDTSevere Thunderstorm WarningMFLCollier32 min
Apr 30, 12:38 PM EDTSpecial Weather StatementMFLBroward, Palm Beach67 min
Apr 30, 12:43 PM EDTSpecial Weather StatementMFLBroward47 min
Apr 30, 12:45 PM EDTSpecial Marine WarningMFL60 min
Apr 30, 1:01 PM EDTSpecial Weather StatementMFLMiami-Dade, Monroe44 min
Apr 30, 1:20 PM EDTSevere Thunderstorm WarningMFLMiami-Dade55 min
Apr 30, 1:22 PM EDTSpecial Marine WarningMFL83 min
Apr 30, 1:37 PM EDTSpecial Weather StatementMFLBroward53 min
Apr 30, 1:43 PM EDTSpecial Marine WarningMFL62 min
Apr 30, 1:48 PM EDTSpecial Marine WarningMFL87 min
Apr 30, 2:00 PM EDTSevere Thunderstorm WarningMFLBroward29 min
Apr 30, 2:28 PM EDTSpecial Marine WarningMFL92 min
Apr 30, 3:08 PM EDTSpecial Weather StatementMFLMonroe52 min
Apr 30, 3:18 PM EDTSpecial Marine WarningMFL42 min
Apr 30, 3:50 PM EDTSpecial Weather StatementMFLMiami-Dade40 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.