Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Miami, FL

April 10, 2021Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 10, 2021, 8:12 PM EDT for Palm Beach County, Florida. It was in force for 33 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 10, 2021, 8:12 PM EDT (00:12 UTC)
Expired: Apr 10, 2021, 8:45 PM EDT
In force: 33 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 Miami radar (KAMX), 122 km from the middle of the area, began a volume at 00:12 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 00:00Z, 0.2 hours before the alert went out and 97 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 781 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1002 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

480 
WUUS52 KMFL 110012
SVRMFL
FLC099-110045-
/O.NEW.KMFL.SV.W.0006.210411T0012Z-210411T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
812 PM EDT Sat Apr 10 2021

The National Weather Service in Miami has issued a

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

* Until 845 PM EDT.

* At 812 PM EDT, a severe thunderstorm was located over Loxahatchee
  Groves, or near Wellington, moving northeast 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, Wellington, Jupiter, Palm Beach Gardens and
  Riviera 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 2658 8033 2672 8040 2690 8007 2668 8000
TIME...MOT...LOC 0012Z 242DEG 22KT 2668 8028 

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

CWC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 10, 8:46 PM EDT	Special Marine Warning	MFL		44 min
Apr 10, 8:46 PM EDT	Special Weather Statement	MFL	Broward	44 min
Apr 10, 8:51 PM EDT	Special Weather Statement	MFL	Palm Beach	39 min
Apr 10, 8:55 PM EDT	Special Marine Warning	MFL		65 min
Apr 10, 9:16 PM EDT	Special Weather Statement	MFL	Palm Beach	44 min
Apr 11, 9:22 AM EDT	Small Craft Advisory	MFL		17 hr
Apr 11, 1:33 PM EDT	Special Weather Statement	MFL	Palm Beach	42 min
Apr 11, 1:58 PM EDT	Special Weather Statement	MFL	Glades	47 min
Apr 11, 2:05 PM EDT	Special Marine Warning	MFL		85 min
Apr 11, 2:25 PM EDT	Severe Thunderstorm Warning	MFL	Glades	35 min
Apr 11, 2:33 PM EDT	Special Weather Statement	MFL	Palm Beach	57 min
Apr 11, 2:39 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	66 min
Apr 11, 2:47 PM EDT	Special Weather Statement	MFL	Glades	43 min
Apr 11, 2:49 PM EDT	Special Marine Warning	MFL		86 min
Apr 11, 2:56 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	64 min
Apr 11, 3:04 PM EDT	Special Weather Statement	MFL	Glades	41 min
Apr 11, 3:30 PM EDT	Special Weather Statement	MFL	Glades, Hendry	45 min
Apr 11, 3:30 PM EDT	Special Weather Statement	MFL	Broward	60 min
Apr 11, 3:32 PM EDT	Special Marine Warning	MFL		58 min
Apr 11, 3:39 PM EDT	Special Marine Warning	MFL		96 min
Apr 11, 3:50 PM EDT	Special Marine Warning	MFL		85 min
Apr 11, 4:08 PM EDT	Special Marine Warning	MFL		97 min
Apr 11, 4:12 PM EDT	Special Weather Statement	MFL	Hendry	48 min
Apr 11, 4:14 PM EDT	Special Weather Statement	MFL	Broward	61 min
Apr 11, 4:18 PM EDT	Severe Thunderstorm Warning	MFL	Broward	40 min
Apr 11, 4:35 PM EDT	Special Weather Statement	MFL	Broward	55 min
Apr 11, 4:56 PM EDT	Special Weather Statement	MFL	Collier	49 min
Apr 11, 5:06 PM EDT	Special Marine Warning	MFL		84 min
Apr 11, 5:15 PM EDT	Special Weather Statement	MFL	Miami-Dade	60 min
Apr 11, 5:16 PM EDT	Special Marine Warning	MFL		89 min
Apr 11, 5:24 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	36 min
Apr 11, 5:46 PM EDT	Special Marine Warning	MFL		89 min
Apr 11, 5:49 PM EDT	Special Weather Statement	MFL	Monroe	41 min
Apr 11, 6:09 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	36 min
Apr 11, 6:16 PM EDT	Special Weather Statement	MFL	Miami-Dade	44 min
Apr 11, 6:31 PM EDT	Special Weather Statement	MFL	Monroe	44 min
Apr 11, 6:35 PM EDT	Special Marine Warning	MFL		55 min
Apr 11, 6:38 PM EDT	Special Marine Warning	MFL		67 min
Apr 11, 7:00 PM EDT	Special Weather Statement	MFL	Miami-Dade	45 min
Apr 11, 7:31 PM EDT	Special Marine Warning	MFL		59 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every 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.