Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 44, NWS Miami, FL

July 12, 2021Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 12, 2021, 3:36 PM EDT for Palm Beach County, Florida. It was in force for 14 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
Jul 12, 2021, 3:36 PM EDT (19:36 UTC)
Expired
Jul 12, 2021, 3:50 PM EDT
In force
14 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Palm Beach County, FL

The radar

The Melbourne radar (KMLB), 137 km from the middle of the area, began a volume at 19:36 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.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 7.6 hours before the alert went out and 121 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 2021-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1528 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 2021-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -71 square meters per square second.193958Sfc1 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
1528 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
1074 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-71 m²/s²
0-3 km storm-relative helicity
-51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

982 
WUUS52 KMFL 121936
SVRMFL
FLC099-122030-
/O.NEW.KMFL.SV.W.0044.210712T1936Z-210712T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
336 PM EDT Mon Jul 12 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Northeastern Palm Beach County in southeastern Florida...

* Until 430 PM EDT.

* At 336 PM EDT, a severe thunderstorm was located over North County
  Airport, or near Palm Beach Gardens, moving northwest at 25 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  West Palm Beach, Jupiter, Palm Beach Gardens, Riviera Beach and
  Palm Beach.

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 2675 8005 2692 8070 2698 8069 2702 8065
      2702 8063 2696 8061 2696 8018 2690 8011
      2681 8003
TIME...MOT...LOC 1936Z 127DEG 22KT 2685 8024 

HAIL...<.75IN
WIND...60MPH
 
$$

DH
1 follow-up statement
108 
WWUS52 KMFL 121950
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
350 PM EDT Mon Jul 12 2021

FLC099-122000-
/O.CAN.KMFL.SV.W.0044.000000T0000Z-210712T2030Z/
Palm Beach FL-
350 PM EDT Mon Jul 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PALM BEACH COUNTY
IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

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

LAT...LON 2675 8005 2692 8070 2698 8069 2702 8065
      2702 8063 2696 8061 2696 8018 2690 8011
      2681 8003
TIME...MOT...LOC 1950Z 127DEG 22KT 2690 8032 

$$

DH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 4:48 AM EDTSpecial Marine WarningMFL57 min
Jul 12, 5:01 AM EDTSpecial Weather StatementMFLBroward44 min
Jul 12, 5:20 AM EDTSpecial Weather StatementMFLBroward25 min
Jul 12, 5:55 AM EDTSpecial Marine WarningMFL37 min
Jul 12, 6:58 AM EDTSpecial Weather StatementMFLMonroe32 min
Jul 12, 7:22 AM EDTSpecial Marine WarningMFL38 min
Jul 12, 7:28 AM EDTSpecial Weather StatementMFLMonroe47 min
Jul 12, 8:40 AM EDTSpecial Marine WarningMFL48 min
Jul 12, 8:46 AM EDTSpecial Weather StatementMFLMiami-Dade44 min
Jul 12, 8:53 AM EDTSpecial Weather StatementMFLMiami-Dade67 min
Jul 12, 9:15 AM EDTSpecial Weather StatementMFLMiami-Dade75 min
Jul 12, 10:36 AM EDTSpecial Marine WarningMFL39 min
Jul 12, 10:40 AM EDTSpecial Weather StatementMFLPalm Beach50 min
Jul 12, 10:59 AM EDTSpecial Weather StatementMFLBroward46 min
Jul 12, 11:09 AM EDTSpecial Marine WarningMFL21 min
Jul 12, 11:11 AM EDTSpecial Marine WarningMFL49 min
Jul 12, 11:14 AM EDTSpecial Weather StatementMFLPalm Beach46 min
Jul 12, 11:20 AM EDTSpecial Weather StatementMFLGlades, Hendry55 min
Jul 12, 11:27 AM EDTSevere Thunderstorm WarningMFLGlades, Hendry, Palm Beach32 min
Jul 12, 11:34 AM EDTSpecial Marine WarningMFL41 min
Jul 12, 11:37 AM EDTSpecial Weather StatementMFLMiami-Dade38 min
Jul 12, 11:38 AM EDTSpecial Weather StatementMFLBroward37 min
Jul 12, 11:44 AM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade46 min
Jul 12, 11:56 AM EDTSpecial Marine WarningMFL19 min
Jul 12, 12:04 PM EDTAreal Flood AdvisoryMFLMiami-Dade30 min
Jul 12, 12:07 PM EDTSpecial Weather StatementMFLGlades53 min
Jul 12, 12:10 PM EDTSpecial Weather StatementMFLBroward65 min
Jul 12, 12:11 PM EDTSpecial Marine WarningMFL49 min
Jul 12, 12:14 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade16 min
Jul 12, 12:18 PM EDTSpecial Weather StatementMFLPalm Beach27 min
Jul 12, 12:19 PM EDTSpecial Marine WarningMFL25 min
Jul 12, 12:23 PM EDTAreal Flood AdvisoryMFLMiami-Dade34 min
Jul 12, 12:31 PM EDTSpecial Marine WarningMFL29 min
Jul 12, 12:34 PM EDTFlash Flood WarningMFLMiami-Dade2 hr
Jul 12, 12:49 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade2 hr
Jul 12, 12:53 PM EDTSpecial Marine WarningMFL97 min
Jul 12, 12:57 PM EDTFlash Flood WarningMFLMiami-Dade2 hr
Jul 12, 1:04 PM EDTSpecial Weather StatementMFLBroward56 min
Jul 12, 1:06 PM EDTSpecial Weather StatementMFLMiami-Dade54 min
Jul 12, 1:20 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade16 min
Jul 12, 1:22 PM EDTSpecial Marine WarningMFL38 min
Jul 12, 2:15 PM EDTSpecial Weather StatementMFLPalm Beach45 min
Jul 12, 2:30 PM EDTSevere Thunderstorm WarningMFLPalm Beach45 min
Jul 12, 2:31 PM EDTSpecial Marine WarningMFL44 min
Jul 12, 2:39 PM EDTSpecial Marine WarningMFL66 min
Jul 12, 2:59 PM EDTSpecial Marine WarningMFL61 min
Jul 12, 3:05 PM EDTSevere Thunderstorm WarningMFLPalm Beach40 min
Jul 12, 3:09 PM EDTSpecial Weather StatementMFLPalm Beach51 min
Jul 12, 3:25 PM EDTSpecial Marine WarningMFL35 min
Jul 12, 3:40 PM EDTSpecial Marine WarningMFL20 min
Jul 12, 3:54 PM EDTSpecial Weather StatementMFLGlades51 min
Jul 12, 3:56 PM EDTSpecial Marine WarningMFL33 min
Jul 12, 5:43 PM EDTSpecial Marine WarningMFL47 min
Jul 12, 6:33 PM EDTSpecial Marine WarningMFL57 min
Jul 12, 6:46 PM EDTSpecial Marine WarningMFL29 min
Jul 12, 7:07 PM EDTSpecial Marine WarningMFL68 min
Jul 12, 7:36 PM EDTSpecial Marine WarningMFL39 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every severe thunderstorm warning 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; radar from the NEXRAD Level II archive.