Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

August 7, 2021Palm Beach County, Florida

NWS Miami, FL issued this special weather statement at Aug 7, 2021, 7:32 AM EDT for Palm Beach County, Florida. It was in force for 28 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
Aug 7, 2021, 7:32 AM EDT (11:32 UTC)
Expired
Aug 7, 2021, 8:00 AM EDT
In force
28 min
Issued by
NWS Miami, FL
Hail
0.00 in
Wind
40

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 129 km from the middle of the area, began a volume at 11:36 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 00:00Z, 11.5 hours before the alert went out and 103 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 00:00Z on 2021-08-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1938 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 00:00Z on 2021-08-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 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
1938 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1054 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

318 
WWUS82 KMFL 071132
SPSMFL

Special Weather Statement
National Weather Service Miami FL
732 AM EDT Sat Aug 7 2021
 
FLZ068-168-071200-
Coastal Palm Beach County FL-Metro Palm Beach County FL-
732 AM EDT Sat Aug 7 2021

...Strong thunderstorms will impact portions of eastern Palm Beach 
County through 800 AM EDT...

At 732 AM EDT, National Weather Service meteorologists were tracking
strong thunderstorms capable of producing a funnel cloud along a line
extending from Juno Ridge to Downtown West Palm Beach to near
Lantana. Movement was north at 5 mph.

HAZARD...Funnel clouds and winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Funnel clouds occasionally touch down and produce tornadoes 
         or waterspouts. Gusty winds could knock down tree limbs and 
         blow around unsecured objects.

Locations impacted include...
West Palm Beach, Boynton Beach, Delray Beach, Wellington, Jupiter,
Palm Beach Gardens, Lake Worth, Riviera Beach, Palm Beach, Tequesta,
Juno Beach, Ocean Ridge, Greenacres, Palm Springs, North Palm Beach,
Lantana, Lake Park, Atlantis, Haverhill and Cloud Lake.

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.

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.

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

&&

LAT...LON 2647 8003 2642 8004 2649 8019 2689 8017
      2696 8015 2696 8014 2697 8014 2697 8003
TIME...MOT...LOC 1132Z 159DEG 6KT 2684 8005 2672 8006 2657 8009 

FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

$$

RAG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 7:37 AM EDTSpecial Marine WarningMFL23 min
Aug 7, 8:43 AM EDTAreal Flood AdvisoryMFLPalm Beach2 hr
Aug 7, 10:03 AM EDTSpecial Weather StatementMFLMiami-Dade27 min
Aug 7, 10:29 AM EDTSpecial Weather StatementMFLMiami-Dade31 min
Aug 7, 11:04 AM EDTSpecial Weather StatementMFLPalm Beach41 min
Aug 7, 1:54 PM EDTSpecial Weather StatementMFLHendry51 min
Aug 7, 2:48 PM EDTAreal Flood AdvisoryMFLCollier117 min
Aug 7, 3:18 PM EDTAreal Flood AdvisoryMFLPalm Beach117 min
Aug 7, 3:29 PM EDTSpecial Weather StatementMFLPalm Beach46 min
Aug 7, 3:39 PM EDTSpecial Weather StatementMFLPalm Beach36 min
Aug 7, 3:48 PM EDTSpecial Weather StatementMFLMiami-Dade42 min
Aug 7, 4:04 PM EDTSpecial Weather StatementMFLPalm Beach41 min
Aug 7, 4:22 PM EDTAreal Flood AdvisoryMFLMiami-Dade113 min
Aug 7, 4:31 PM EDTSpecial Weather StatementMFLMiami-Dade44 min
Aug 7, 4:44 PM EDTSpecial Weather StatementMFLMiami-Dade46 min
Aug 7, 4:49 PM EDTSpecial Weather StatementMFLPalm Beach41 min
Aug 7, 5:02 PM EDTSpecial Weather StatementMFLBroward43 min
Aug 7, 5:41 PM EDTAreal Flood AdvisoryMFLBroward64 min

Nearby

Special Weather Statements in Florida, 2021Every 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.