Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Miami, FL

June 20, 2015Monroe County, Florida

NWS Miami, FL issued this special weather statement at Jun 20, 2015, 2:47 PM EDT for Monroe County, Florida. It was in force for 43 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
Jun 20, 2015, 2:47 PM EDT (18:47 UTC)
Expired
Jun 20, 2015, 3:30 PM EDT
In force
43 min
Issued by
NWS Miami, FL

County Monroe County, FL

The radar

The Miami radar (KAMX), 61 km from the middle of the area, began a volume at 18:47 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, 6.8 hours before the alert went out and 82 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 2015-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2310 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 2015-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 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
2310 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
764 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Jun 20, 1:53 PM EDT, 54 minutes earlier.

Area forecast discussion, Jun 20, 1:53 PM EDT, 54 minutes before
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</head>
<body>
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    <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>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Hazardous weather outlook, Jun 20, 9:06 AM EDT, 5 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
906 AM EDT SAT JUN 20 2015

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
210115-
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 EXTENDING FROM
20 NM TO 60 NM-
WATERS FROM DEERFIELD BEACH TO OCEAN REEF, FL EXTENDING FROM 20 NM
TO THE TERRITORIAL WATERS OF THE 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-
GULF WATERS FROM CHOKOLOSKEE TO BONITA BEACH, FL EXTENDING FROM
20 TO 60 NM-
906 AM EDT SAT JUN 20 2015

...SCATTERED TO NUMEROUS THUNDERSTORMS INTERIOR AND GULF COAST...
...WATERSPOUTS POSSIBLE ACROSS THE ATLANTIC WATERS...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS: SCATTERED TO NUMEROUS THUNDERSTORMS ARE POSSIBLE
TODAY, WITH THE BEST CHANCES IN THE INTERIOR AND ALONG THE GULF
COAST. THE MAIN THREAT WILL BE FREQUENT CLOUD TO GROUND LIGHTNING
AND GUSTY WINDS.

WIND: THE STRONGER THUNDERSTORMS THIS AFTERNOON HAVE THE POTENTIAL
OF PRODUCING WIND GUSTS OF 45 TO 55 MPH, MAINLY IN THE INTERIOR
AND ALONG THE GULF COAST.

TEMPERATURES: THE HEAT INDEX COULD REACH TO BETWEEN 100 AND 107 DEGREES
ACROSS MOST OF THE PENINSULA THIS AFTERNOON.

WATERSPOUTS: WIND SPEED AND DIRECTION IS VERY FAVORABLE TODAY FOR
THE PRODUCTION OF WATERSPOUTS WITHIN LINES OF CLOUDS AND SHOWERS.
THERE IS A HIGHER RISK THAN USUAL FOR WATERSPOUTS THIS MORNING.

FLOODING: WITH SLOW STORM MOTION EXPECTED TODAY LOCALLY HEAVY
RAINFALL COULD LEAD TO MINOR FLOODING IN URBAN AND POOR DRAINAGE
AREAS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

ISOLATED TO SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS
ARE FORECAST EACH DAY, MAINLY OVER THE INTERIOR AND GULF COAST.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.

FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN
MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI.

In the hours before

Special weather statement, Jun 20, 2:47 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
247 PM EDT SAT JUN 20 2015

FLZ073-075-174-201930-
FAR SOUTH MIAMI-DADE COUNTY FL-MAINLAND MONROE FL-INLAND MIAMI-
DADE COUNTY FL-
247 PM EDT SAT JUN 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT TO EXCESSIVE LIGHTNING
AND 45 TO 55 MPH WINDS FOR WEST CENTRAL MIAMI-DADE AND EAST CENTRAL
MAINLAND MONROE COUNTIES UNTIL 330 PM EDT...

* AT 247 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
  NEAR PA-HAY-OKEE OVERLOOK...OR 16 MILES WEST OF HOMESTEAD GENERAL
  AIRPORT...MOVING SOUTHWEST AT 20 MPH.

* THE PRIMARY IMPACTS WILL BE FREQUENT TO EXCESSIVE LIGHTNING AND
  GUSTY WINDS OF 45 TO 55 MPH.  LIGHTNING IS THE NUMBER ONE WEATHER
  RELATED KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO
  PROTECTION. 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.

* LOCATIONS IMPACTED INCLUDE...
  PA-HAY-OKEE OVERLOOK.

LAT...LON 2527 8091 2526 8092 2534 8097 2533 8097
      2535 8099 2533 8102 2537 8104 2542 8097
      2543 8109 2555 8117 2557 8111 2553 8106
      2553 8105 2554 8105 2557 8106 2557 8110
      2568 8080 2558 8068 2521 8093
TIME...MOT...LOC 1847Z 045DEG 16KT 2552 8081

10

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 3:36 PM EDTSpecial Weather StatementMFLMonroe39 min
Jun 20, 6:21 PM EDTSpecial Weather StatementMFLCollier39 min
Jun 20, 7:00 PM EDTSpecial Weather StatementMFLCollier45 min
Jun 20, 7:45 PM EDTSpecial Marine WarningMFL45 min
Jun 20, 7:47 PM EDTSpecial Weather StatementMFLCollier43 min

Nearby

Special Weather Statements in Florida, 2015Every special weather statement in 2015

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.