Alert archive / Florida / Special Weather Statements in 2021

Special Weather Statement, NWS Miami, FL

September 4, 2021Palm Beach County, Florida

NWS Miami, FL issued this special weather statement at Sep 4, 2021, 3:03 PM EDT for Palm Beach County, Florida. It was in force for 27 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: Sep 4, 2021, 3:03 PM EDT (19:03 UTC)
Expired: Sep 4, 2021, 3:30 PM EDT
In force: 27 min
Issued by: NWS Miami, FL
Hail: 0.00 in
Wind: 40

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 111 km from the middle of the area, began a volume at 19:06 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, 7.1 hours before the alert went out and 85 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: 845 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this special weather statement went out at Sep 4, 1:37 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Sep 4, 1:37 PM EDT, 1 hour 26 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Sep 4, 9:57 AM EDT, 5 hours 6 minutes before

Hazardous Weather Outlook for South Florida...UPDATED
National Weather Service Miami FL
957 AM EDT Sat Sep 4 2021

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
050200-
Lake Okeechobee-Biscayne Bay-
Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM-
Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM-
Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM-
Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM
excluding the territorial waters of Bahamas-Glades-Hendry-
Inland Palm Beach-Metro Palm Beach-Coastal Collier-Inland Collier-
Inland Broward-Metro Broward-Inland Miami-Dade-Metro Miami-Dade-
Mainland Monroe-Coastal Palm Beach-Coastal Broward-Coastal Miami-
Dade-Far South Miami-Dade-
Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM-
Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM-
Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM-
957 AM EDT Sat Sep 4 2021

...Localized flooding possible with showers and storms...
...Gulf Beaches: Moderate Rip Current Risk...

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Rip currents: There is a moderate risk of rip currents along the Gulf
Coast beaches.

Thunderstorms: scattered to numerous thunderstorms expected today
with frequent lightning, localized flooding, and locally gusty winds.

Waterspouts: A few waterspouts are possible with showers and storms,
mainly over the local waters.

Flooding: Localized flooding from repeated rounds of showers and storms
will be possible along the east coast metro areas and the Lake region.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Scattered showers and thunderstorms will continue through the rest
of the forecast period, with locally gusty winds, frequent lightning,
and heavy rainfall and flooding possible.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not anticipated, however individual
spotters are encouraged to report high wind, hail and flooding to
the National Weather Service forecast office in Miami.

For more information...visit the National Weather Service in
Miami website at www.weather.gov/miami.

RAG

In the hours before

Special weather statement, Sep 4, 12:29 PM EDT, 2 hours 34 minutes before

Special Weather Statement
National Weather Service Miami FL
1229 PM EDT Sat Sep 4 2021

FLZ070-071-073-075-174-041700-
Inland Broward County FL-Inland Collier County FL-Mainland Monroe FL-
Far South Miami-Dade County FL-Inland Miami-Dade County FL-
1229 PM EDT Sat Sep 4 2021

...Strong thunderstorms will impact portions of southeastern Collier,
Mainland Monroe and western Miami-Dade Counties through 100 PM EDT...

At 1229 PM EDT, National Weather Service meteorologists were tracking
strong thunderstorms capable of producing a funnel cloud along a line
extending from near Fortymile Bend to near Mahogany Hammock. Movement
was east at 10 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...
The Redland, Loop Road EE Center, Everglades National Park,
Dade-Collier Training Airport, Fortymile Bend, Royal Palm Ranger,
Shark Valley Obs Tower, Mahogany Hammock, Pa-Hay-Okee Overlook and
Big Cypress National Preserve.

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.

Persons participating in outdoor activities should seek sturdy
shelter until these storms pass. Open shelters found in parks,
beaches, or golf courses offer no protection from the dangers of
lightning.

&&

LAT...LON 2586 8109 2596 8066 2520 8050 2521 8057
      2522 8056 2523 8052 2524 8054 2523 8054
      2524 8055 2518 8061 2518 8062 2520 8060
      2519 8063 2518 8063 2519 8066 2521 8074
      2517 8094
TIME...MOT...LOC 1629Z 260DEG 10KT 2579 8087 2529 8076

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

RAG

Special weather statement, Sep 4, 1:13 PM EDT, 1 hour 50 minutes before

Special Weather Statement
National Weather Service Miami FL
113 PM EDT Sat Sep 4 2021

FLZ073-074-173-174-041745-
Metropolitan Miami Dade FL-Far South Miami-Dade County FL-
Inland Miami-Dade County FL-Coastal Miami Dade County FL-
113 PM EDT Sat Sep 4 2021

...Strong thunderstorms will impact portions of central Miami-Dade
County through 145 PM EDT...

At 113 PM EDT, National Weather Service meteorologists were tracking
strong thunderstorms along a line extending from 8 miles west of
Intersection Krome And Kendall Drive to The Redland to near Florida
City. Movement was northeast at 15 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Homestead, Homestead Miami Speedway, Black Point, Homestead General
Airport, The Redland, Turkey Point, Kendall, Florida City, Homestead
Base, Naranja, Richmond West, Richmond Heights, Country Walk, Kendale
Lakes, Leisure City, Palmetto Bay, Cutler Bay, Zoo Miami, Goulds and
The Hammocks.

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.

Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2527 8059 2548 8069 2562 8074 2584 8047
      2562 8032 2534 8022 2533 8026 2534 8025
      2535 8027 2533 8027
TIME...MOT...LOC 1713Z 245DEG 11KT 2565 8060 2553 8052 2537 8046

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

SB

Special weather statement, Sep 4, 2:34 PM EDT, 29 minutes before

Special Weather Statement
National Weather Service Miami FL
234 PM EDT Sat Sep 4 2021

FLZ068-168-041900-
Coastal Palm Beach County FL-Metro Palm Beach County FL-
234 PM EDT Sat Sep 4 2021

...A strong thunderstorm will impact portions of east central Palm
Beach County through 300 PM EDT...

At 234 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over Palm
Beach International Airport, or near Palm Beach, moving east at 5
mph.

HAZARD...Funnel clouds and wind gusts up to 50 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, Lake Worth, Riviera Beach, Palm
Beach, Greenacres, Palm Springs, Lantana, Atlantis, Haverhill, Cloud
Lake, Palm Beach International Airport, Port Of Palm Beach, Gun Club
Estates, Schall Circle, Royal Palm Estates, Lake Belvedere Estates,
Downtown West Palm Beach, Golden Lakes and Lake Clarke Shores.

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.

&&

LAT...LON 2660 8018 2678 8015 2679 7991 2652 7996
TIME...MOT...LOC 1834Z 278DEG 5KT 2668 8009

FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

RAG

Special weather statement, Sep 4, 2:46 PM EDT, 17 minutes before

Special Weather Statement
National Weather Service Miami FL
246 PM EDT Sat Sep 4 2021

FLZ072-074-172-173-041915-
Coastal Broward County FL-Metro Broward County FL-
Metropolitan Miami Dade FL-Coastal Miami Dade County FL-
246 PM EDT Sat Sep 4 2021

...A strong thunderstorm will impact portions of northern Miami-Dade
County through 315 PM EDT...

At 246 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over Miami
Shores, or near Surfside, moving east 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...
Miami, Hollywood, Miramar, Miami Beach, Surfside, Hallandale, Miami
Gardens, North Miami, North Miami Beach, Aventura, Sunny Isles Beach,
Opa-Locka, West Park, Miami Shores, North Bay Village, El Portal,
Gladeview, Westview, Port Of Miami and West Little River.

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.

&&

LAT...LON 2590 8003 2590 8004 2582 8004 2576 8005
      2578 8025 2596 8027 2603 8004
TIME...MOT...LOC 1846Z 265DEG 4KT 2588 8019

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

RAG

Special weather statement, Sep 4, 3:03 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Miami FL
303 PM EDT Sat Sep 4 2021

FLZ067-068-168-041930-
Coastal Palm Beach County FL-Inland Palm Beach County FL-
Metro Palm Beach County FL-
303 PM EDT Sat Sep 4 2021

...A strong thunderstorm will impact portions of east central Palm
Beach County through 330 PM EDT...

At 303 PM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over
Lantana, or near Lake Worth, moving south at 15 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...
Boynton Beach, Delray Beach, Lake Worth, Palm Beach, Ocean Ridge,
Greenacres, Palm Springs, Lantana, Atlantis, Village Of Golf, Dunes
Road, Lake Clarke Shores, Hypoluxo, South Palm Beach, Gulf Stream,
Briny Breezes, Manalapan, Aberdeen, Lake Worth Corridor and Aberdeen
Golf Course.

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.

&&

LAT...LON 2663 8003 2646 8003 2647 8023 2664 8016
TIME...MOT...LOC 1903Z 003DEG 13KT 2658 8007

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

Hadi

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 4, 12:29 PM EDT	Special Weather Statement	MFL	Monroe	31 min
Sep 4, 1:13 PM EDT	Special Weather Statement	MFL	Miami-Dade	32 min
Sep 4, 2:34 PM EDT	Special Weather Statement	MFL	Palm Beach	26 min
Sep 4, 2:39 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	2 hr
Sep 4, 2:44 PM EDT	Areal Flood Advisory	MFL	Broward	2 hr
Sep 4, 2:46 PM EDT	Special Weather Statement	MFL	Broward	29 min
Sep 4, 2:51 PM EDT	Special Marine Warning	MFL		24 min
Sep 4, 2:52 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	113 min
Sep 4, 2:54 PM EDT	Special Marine Warning	MFL		36 min
Sep 4, 3:17 PM EDT	Special Weather Statement	MFL	Broward	43 min
Sep 4, 3:25 PM EDT	Special Weather Statement	MFL	Broward	35 min
Sep 4, 3:29 PM EDT	Severe Thunderstorm Warning	MFL	Broward	13 min
Sep 4, 3:30 PM EDT	Areal Flood Advisory	MFL	Broward, Miami-Dade	2 hr
Sep 4, 4:17 PM EDT	Special Weather Statement	MFL	Palm Beach	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.