Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

May 7, 2021Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at May 7, 2021, 8:44 PM EDT for Miami-Dade County, Florida. It was in force for 46 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: May 7, 2021, 8:44 PM EDT (00:44 UTC)
Expired: May 7, 2021, 9:30 PM EDT
In force: 46 min
Issued by: NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 30 km from the middle of the area, began a volume at 00:46 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, 0.7 hours before the alert went out and 24 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: 1449 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 982 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -20 m²/s²
0-3 km storm-relative helicity: 11 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

As transmitted.

786 
WWUS82 KMFL 080044
SPSMFL

Special Weather Statement
National Weather Service Miami FL
844 PM EDT Fri May 7 2021
 
FLZ173-080130-
Coastal Miami Dade County FL-
844 PM EDT Fri May 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR  UNTIL 930 PM EDT...

* At 844 PM EDT, National Weather Service meteorologists were
  tracking a strong thunderstorm over Key Biscayne, moving east at 15
  mph.

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

* Locations impacted include...
  Key Biscayne.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

Torrential rainfall is also occurring with this storm, 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 2564 8008 2563 8009 2563 8021 2573 8021
      2573 8006
TIME...MOT...LOC 0044Z 274DEG 12KT 2569 8015 

$$

Weinman

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 9:38 PM EDT	Special Marine Warning	MFL		52 min
May 7, 10:26 PM EDT	Special Marine Warning	MFL		48 min
May 8, 11:01 AM EDT	Rip Current Statement	MFL	Broward, Miami-Dade, Palm Beach	33 hr
May 8, 12:47 PM EDT	Special Weather Statement	MFL	Miami-Dade	28 min

Nearby

Special Weather Statements in Florida, 2021 Every special weather statement 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.