Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Miami, FL

April 29, 2011Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Apr 29, 2011, 3:06 PM EDT for Miami-Dade County, Florida. It was in force for 24 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 29, 2011, 3:06 PM EDT (19:06 UTC)
Expired
Apr 29, 2011, 3:30 PM EDT
In force
24 min
Issued by
NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 28 km from the middle of the area, began a volume at 19:10 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 2 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 2011-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1633 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 2011-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
1633 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
743 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
-7 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 Apr 29, 1:37 PM EDT, 1 hour 29 minutes earlier.

Area forecast discussion, Apr 29, 1:37 PM EDT, 1 hour 29 minutes before
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</head>
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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, Apr 29, 8:36 AM EDT, 6 hours 30 minutes before
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
836 AM EDT FRI APR 29 2011

FLZ063-066>075-168-172>174-300345-
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-
836 AM EDT FRI APR 29 2011

...STRONG STORMS POSSIBLE LAKE OKEECHOBEE AREA AND PALM BEACHES...
...ISOLATED WEAK TORNADOES OR WATERSPOUTS PALM BEACH AND BROWARD AND ADJACENT WATERS...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS: SCATTERED TO NUMEROUS THUNDERSTORMS WILL DEVELOP
THIS AFTERNOON AND EARLY EVENING OVER MOST OF SOUTH FLORIDA. THE
MOST CONCENTRATED AREA OF STORMS IS EXPECTED TO BE OVER THE LAKE
OKEECHOBEE REGION AND PALM BEACH COUNTY, WITH LESS COVERAGE ALONG
THE GULF COAST.

WIND: GUSTS OF 40 TO 50 MPH CAN BE EXPECTED WITH THE STRONGEST
THUNDERSTORMS THIS AFTERNOON AND EARLY EVENING, EXCEPT POSSIBLY
UP TO 60 MPH AROUND LAKE OKEECHOBEE AND PALM BEACH COUNTY.

TORNADOES: WEAK TORNADOES OR WATERSPOUTS ARE POSSIBLE IN THE
STRONGEST STORMS THIS AFTERNOON OVER PALM BEACH AND BROWARD
COUNTIES AND THE ADJACENT COASTAL WATERS.

HAIL: LARGE HAIL IS POSSIBLE IN THE STRONGEST STORMS THIS
AFTERNOON AND EARLY EVENING AROUND LAKE OKEECHOBEE AND PALM BEACH
COUNTY, WITH SMALL HAIL A POSSIBILITY ELSEWHERE.

VISIBILITY: REDUCED VISIBILITIES IN FOG AND SMOKE ARE POSSIBLE
OVER GLADES, HENDRY AND INLAND SECTIONS OF COLLIER COUNTY EARLY
THIS MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE RISK OF RIP CURRENTS WILL SIGNIFICANTLY INCREASE ALONG THE
ATLANTIC BEACHES THIS WEEKEND INTO EARLY NEXT WEEK AS EASTERLY
WINDS INCREASE TO 15 TO 20 MPH.

AS THE EASTERLY WINDS INCREASE OVER SOUTH FLORIDA BEGINNING ON
SATURDAY, THIS COULD PRESENT A PROBLEM WITH THE FIRE IN THE GOLDEN
GATE ESTATES AREA. IF THE FIRE IS NOT CONTAINED BY THE TIME THE
WINDS INCREASE OUT OF THE EAST THIS WEEKEND, IT COULD RESULT IN
EVACUATIONS ORDERS FOR A FEW OF THE SURROUNDING COMMUNITIES WEST
OF THE FIRE. RESIDENTS IN THAT AREA ARE ADVISED TO REMAIN ON THE ALERT
AND STAY TUNED WITH INFORMATION COMING FROM THE LOCAL AUTHORITIES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY. 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.

In the hours before

Local storm report, Apr 29, 3:03 PM EDT, 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
303 PM EDT FRI APR 29 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0250 PM     HAIL             2 S WESTON              25.73N 80.31W
04/29/2011  E0.75 INCH       MIAMI-DADE         FL   TRAINED SPOTTER

            A TRAINED SPOTTER REPORTED PENNY-SIZED HAIL NEAR THE
            INTERSECTION OF SW 199TH AVENUE AND GRIFFIN ROAD AT 250
            PM EDT.

&&

ROSS
Special weather statement, Apr 29, 3:03 PM EDT, 3 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
303 PM EDT FRI APR 29 2011

FLZ071-072-291930-
INLAND BROWARD COUNTY FL-METRO BROWARD COUNTY FL-
303 PM EDT FRI APR 29 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTH CENTRAL BROWARD COUNTY

* UNTIL 330 PM EDT

* AT 258 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  STRONG THUNDERSTORM NEAR PEMBROKE PINES...AND MOVING EAST AT 10
  MPH.

* THE STORM WILL AFFECT...
  SOUTHWEST RANCHES...
  PEMBROKE PINES...
  COOPER CITY...
  AND SURROUNDING COMMUNITIES.

THE PRIMARY IMPACTS WILL BE UP TO NICKEL SIZED HAIL AND OCCASIONAL
LIGHTNING STRIKES. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. SEEK
SHELTER IN A SAFE BUILDING UNTIL THE STORM PASSES.

LAT...LON 2610 8021 2599 8021 2597 8032 2597 8047
      2616 8046
TIME...MOT...LOC 1903Z 292DEG 11KT 2602 8036

TINGLER
Special weather statement, Apr 29, 3:06 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
306 PM EDT FRI APR 29 2011

FLZ073-074-173-291930-
METROPOLITAN MIAMI DADE FL-INLAND MIAMI-DADE FL-COASTAL MIAMI-
DADE COUNTY FL-
306 PM EDT FRI APR 29 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHEASTERN MIAMI-DADE COUNTY

* UNTIL 330 PM EDT

* AT 304 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  STRONG THUNDERSTORM NEAR HIALEAH...AND MOVING EAST AT 20 MPH.

* THE STORM WILL AFFECT...
  HIALEAH...
  OPA-LOCKA...
  LITTLE HAITI...
  MIAMI SHORES...
  NORTH MIAMI...
  AND SURROUNDING COMMUNITIES.

THE PRIMARY IMPACTS WILL BE FREQUENT TO EXCESSIVE LIGHTNING AND UP TO
NICKEL SIZED HAIL. LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER
IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. SEEK SHELTER
IN A SAFE BUILDING UNTIL THE STORM PASSES.

LAT...LON 2577 8019 2568 8041 2595 8041 2595 8014
TIME...MOT...LOC 1906Z 252DEG 16KT 2586 8029

TINGLER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 3:03 PM EDTSpecial Weather StatementMFLBroward27 min
Apr 29, 3:23 PM EDTSpecial Weather StatementMFLMiami-Dade52 min
Apr 29, 3:33 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade27 min
Apr 29, 3:34 PM EDTSpecial Marine WarningMFL56 min
Apr 29, 3:54 PM EDTSevere Thunderstorm WarningMFLMiami-Dade27 min
Apr 29, 4:02 PM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
Apr 29, 4:08 PM EDTSpecial Marine WarningMFL67 min
Apr 29, 4:13 PM EDTSpecial Weather StatementMFLBroward47 min
Apr 29, 4:46 PM EDTAreal Flood AdvisoryMFLBroward, Palm Beach119 min
Apr 29, 4:47 PM EDTSpecial Weather StatementMFLHendry43 min
Apr 29, 4:53 PM EDTSpecial Weather StatementMFLBroward82 min
Apr 29, 5:00 PM EDTSpecial Weather StatementMFLMiami-Dade30 min
Apr 29, 5:09 PM EDTSpecial Marine WarningMFL66 min
Apr 29, 5:25 PM EDTSpecial Weather StatementMFLHendry65 min
Apr 29, 5:38 PM EDTSpecial Weather StatementMFLPalm Beach22 min
Apr 29, 6:04 PM EDTSpecial Weather StatementMFLBroward56 min
Apr 29, 6:10 PM EDTSpecial Marine WarningMFL65 min
Apr 29, 6:18 PM EDTSpecial Weather StatementMFLCollier57 min
Apr 29, 6:23 PM EDTSevere Thunderstorm WarningMFLCollier, Hendry27 min
Apr 29, 7:03 PM EDTSpecial Weather StatementMFLMiami-Dade42 min
Apr 29, 7:04 PM EDTSpecial Weather StatementMFLCollier41 min

Nearby

Special Weather Statements in Florida, 2011Every special weather statement in 2011

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.