Alert archive / Florida / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 9, NWS Miami, FL

May 14, 2018Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 14, 2018, 5:46 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 23 min. 2 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
May 14, 2018, 5:46 PM EDT (21:46 UTC)
Expired
May 14, 2018, 6:09 PM EDT
In force
23 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

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

The radar

The Miami radar (KAMX), 37 km from the middle of the area, began a volume at 21:47 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
May 14, 5:55 PM EDTHAIL 12 E Pembroke Pines, FLNICKEL TO QUARTER SIZE HAIL REPORTED JUST OFF SOUTH FLAMINGO RD
May 14, 5:57 PM EDTHAIL 0.25Pembroke Pines, FLPEA SIZE HAIL AT I-75 AND PINES

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, 9.8 hours before the alert went out and 16 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 2018-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1337 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 2018-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 100 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
1337 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
686 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
100 m²/s²
0-3 km storm-relative helicity
138 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3

Open this sounding in Storm Lab

The text

As transmitted.

891 
WUUS52 KMFL 142146
SVRMFL
FLC011-086-142230-
/O.NEW.KMFL.SV.W.0009.180514T2146Z-180514T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
546 PM EDT MON MAY 14 2018

The National Weather Service in Miami has issued a

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

* Until 630 PM EDT.

* At 544 PM EDT, a severe thunderstorm was located over Miramar,
  moving northeast at 15 mph.

  HAZARD...Quarter size hail or greater.

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is possible.

* Locations impacted include...
  Hialeah, Pembroke Pines, Hollywood, Miramar and Davie. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

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.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

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

&&

LAT...LON 2587 8038 2589 8047 2592 8049 2611 8041
      2605 8021 2587 8030
TIME...MOT...LOC 2144Z 204DEG 13KT 2596 8037 

HAIL...1.00IN
WIND...<50MPH
 
$$

AR
1 follow-up statement
069 
WWUS52 KMFL 142209
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
609 PM EDT MON MAY 14 2018

FLC011-086-142219-
/O.CAN.KMFL.SV.W.0009.000000T0000Z-180514T2230Z/
Miami-Dade FL-Broward FL-
609 PM EDT MON MAY 14 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MIAMI-DADE AND
SOUTHERN BROWARD COUNTIES IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

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

LAT...LON 2587 8038 2589 8047 2592 8049 2611 8041
      2605 8021 2587 8030
TIME...MOT...LOC 2209Z 204DEG 13KT 2604 8033 

$$

AR

The office that day

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

IssuedProductOfficeCountiesLasted
May 13, 8:25 PM EDTAreal Flood AdvisoryMFLMiami-Dade2 hr
May 13, 8:53 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade112 min
May 13, 10:30 PM EDTSpecial Marine WarningMFL30 min
May 14, 2:00 AM EDTSpecial Marine WarningMFL45 min
May 14, 2:55 AM EDTRip Current StatementMFLBroward, Miami-Dade, Palm Beach17 hr
May 14, 3:16 AM EDTSmall Craft Advisory for WindsMFL7 hr
May 14, 5:10 AM EDTTornado WarningMFLPalm Beach15 min
May 14, 5:27 AM EDTSpecial Weather StatementMFLPalm Beach63 min
May 14, 5:34 AM EDTTornado WarningMFLPalm Beach15 min
May 14, 5:35 AM EDTTornado WarningMFLPalm Beach25 min
May 14, 5:58 AM EDTTornado WarningMFLPalm Beach32 min
May 14, 6:27 AM EDTSpecial Weather StatementMFLMartin48 min
May 14, 6:34 AM EDTSpecial Weather StatementMFLMiami-Dade41 min
May 14, 6:44 AM EDTSpecial Weather StatementMFLHendry46 min
May 14, 7:06 AM EDTSpecial Marine WarningMFL24 min
May 14, 7:07 AM EDTAreal Flood AdvisoryMFLPalm Beach113 min
May 14, 7:29 AM EDTSpecial Marine WarningMFL46 min
May 14, 7:33 AM EDTSpecial Marine WarningMFL42 min
May 14, 7:34 AM EDTSpecial Weather StatementMFLPalm Beach41 min
May 14, 8:11 AM EDTSpecial Marine WarningMFL64 min
May 14, 12:09 PM EDTSpecial Weather StatementMFLMiami-Dade51 min
May 14, 1:00 PM EDTSpecial Marine WarningMFL30 min
May 14, 1:00 PM EDTSpecial Weather StatementMFLPalm Beach60 min
May 14, 1:01 PM EDTSpecial Marine WarningMFL89 min
May 14, 2:28 PM EDTSpecial Marine WarningMFL62 min
May 14, 5:11 PM EDTSpecial Weather StatementMFLBroward49 min
May 14, 6:02 PM EDTSpecial Weather StatementMFLBroward43 min

Nearby

Severe Thunderstorm Warnings in Florida, 2018Every severe thunderstorm warning in 2018

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.