Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Miami, FL

August 28, 2015Palm Beach County, Florida

NWS Miami, FL issued this special weather statement at Aug 28, 2015, 6:21 PM EDT for Palm Beach County, Florida. It was in force for 39 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 28, 2015, 6:21 PM EDT (22:21 UTC)
Expired
Aug 28, 2015, 7:00 PM EDT
In force
39 min
Issued by
NWS Miami, FL

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 129 km from the middle of the area, began a volume at 22:25 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, 10.4 hours before the alert went out and 111 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 2015-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2704 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 2015-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -10 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
2704 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
756 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-10 m²/s²
0-3 km storm-relative helicity
20 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 Aug 28, 5:39 PM EDT, 42 minutes earlier.

Area forecast discussion, Aug 28, 5:39 PM EDT, 42 minutes before
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Hazardous weather outlook, Aug 28, 1:51 PM EDT, 4 hours 30 minutes before
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
151 PM EDT FRI AUG 28 2015

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
290600-
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-
151 PM EDT FRI AUG 28 2015

...SCATTERED TO NUMEROUS THUNDERSTORMS THIS AFTERNOON...
...LOCALIZED HEAVY RAINFALL COULD LEAD TO URBAN FLOODING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

THUNDERSTORMS: THUNDERSTORMS ARE LIKELY OVER SOUTH FLORIDA TODAY.
THE PRIMARY THREAT IS CLOUD TO GROUND LIGHTNING.

WATERSPOUTS: THERE IS A SLIGHT CHANCE OF WATERSPOUTS OVER REGIONAL
WATERS, ESPECIALLY WITH ANY THUNDERSTORMS MOVING OFFSHORE.

FLOODING: VERY HEAVY RAINFALL WITH STATIONARY THUNDERSTORMS CAN
PRODUCE URBAN STREET FLOODING, ESEPCAILLY ACROSS COASTAL PALM
BEACH COUNTY.

WIND: THE STRONGEST THUNDERSTORMS COULD PRODUCE WIND GUSTS TO 45
MPH THIS AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS ARE LIKELY TO DEVELOP EACH DAY WITH THE MAIN RISK
BEING LIGHTNING STRIKES.

TROPICAL STORM ERIKA MAY IMPACT THE REGION LATE THIS WEEKEND INTO
THE EARLY PART OF NEXT WEEK. THERE IS THE POTENTIAL FOR HEAVY
RAINFALL. HAZARDOUS MARINE CONDITIONS COMBINED WITH THE POTENTIAL
FOR A HIGH RISK OF RIP CURRENTS ARE POSSIBLE LATE THIS WEEKEND AND
EARLY NEXT WEEK. PLEASE CONTINUE TO MONITOR THE PROGRESS OF ERIKA.

.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, Aug 28, 3:51 PM EDT, 2 hours 30 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
351 PM EDT FRI AUG 28 2015

FLZ063-066-282030-
GLADES FL-HENDRY FL-
351 PM EDT FRI AUG 28 2015

...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT TO EXCESSIVE
LIGHTNING...SMALL HAIL AND 45 TO 55 MPH WINDS FOR CENTRAL GLADES AND
NORTH CENTRAL HENDRY COUNTIES UNTIL 430 PM EDT...

* AT 351 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
  NEAR MOORE HAVEN...MOVING NORTHWEST AT 20 MPH.

* FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 TO 55 MPH...
  SMALL HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF THESE ARE
  POSSIBLE. 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...
  CLEWISTON...MOORE HAVEN...LAKEPORT...PALMDALE...ORTONA AND LAKE
  HICPOCHEE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO STREET FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 2700 8104 2697 8109 2695 8109 2695 8107
      2693 8108 2693 8112 2689 8112 2682 8106
      2682 8100 2681 8095 2681 8097 2680 8096
      2676 8093 2668 8111 2677 8132 2700 8136
      2712 8109
TIME...MOT...LOC 1951Z 152DEG 17KT 2679 8107

10
Special weather statement, Aug 28, 5:11 PM EDT, 1 hour 10 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
511 PM EDT FRI AUG 28 2015

FLZ067-071-072-282200-
INLAND BROWARD COUNTY FL-METRO BROWARD COUNTY FL-
INLAND PALM BEACH COUNTY FL-
511 PM EDT FRI AUG 28 2015

...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT TO EXCESSIVE
LIGHTNING...SMALL HAIL AND 45 TO 55 MPH WINDS FOR CENTRAL BROWARD AND
SOUTHWESTERN PALM BEACH COUNTIES UNTIL 600 PM EDT...

* AT 510 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
  OVER MILE MARKER 30 ON ALLIGATOR ALLEY...OR 15 MILES WEST OF
  DAVIE...MOVING EAST AT 10 MPH.

* FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 TO 55 MPH...
  SMALL HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF THESE ARE
  POSSIBLE. 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...
  WESTON...INTERSECTION I-75 AND U.S. 27...INTERSECTION ALLIGATOR
  ALLEY AND MIAMI CANAL...MILE MARKER 30 ON ALLIGATOR ALLEY...EAST
  TOLL GATE ON ALLIGATOR ALLEY AND WEST BROWARD REC. AREA ON
  ALLIGATOR ALLEY.

LAT...LON 2597 8053 2617 8076 2636 8065 2623 8036
TIME...MOT...LOC 2110Z 266DEG 7KT 2613 8056

10
Special weather statement, Aug 28, 5:22 PM EDT, 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
522 PM EDT FRI AUG 28 2015

FLZ070-073-075-282200-
MAINLAND MONROE FL-INLAND MIAMI-DADE COUNTY FL-
INLAND COLLIER COUNTY FL-
522 PM EDT FRI AUG 28 2015

...SIGNIFICANT WEATHER ADVISORY FOR FREQUENT TO EXCESSIVE LIGHTNING
AND 45 TO 55 MPH WINDS FOR SOUTHEASTERN COLLIER...NORTHWESTERN
MIAMI-DADE AND NORTHEASTERN MAINLAND MONROE COUNTIES UNTIL 600 PM
EDT...

* AT 522 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
  NEAR FORTYMILE BEND...OR 16 MILES SOUTHEAST OF MONROE STATION...
  MOVING EAST AT 10 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...
  FORTYMILE BEND...LOOP ROAD EE CENTER AND SHARK VALLEY OBS TOWER.

LAT...LON 2560 8102 2585 8099 2587 8071 2554 8080
TIME...MOT...LOC 2122Z 266DEG 7KT 2572 8089

10
Special weather statement, Aug 28, 5:28 PM EDT, 53 minutes before
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Special weather statement, Aug 28, 5:31 PM EDT, 50 minutes before
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Special weather statement, Aug 28, 6:21 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 28, 8:29 AM EDTSpecial Marine WarningMFL91 min
Aug 28, 8:41 AM EDTSpecial Weather StatementMFLMiami-Dade64 min
Aug 28, 1:06 PM EDTAreal Flood AdvisoryMFLPalm Beach3 hr
Aug 28, 1:08 PM EDTSpecial Weather StatementMFLPalm Beach52 min
Aug 28, 3:37 PM EDTSpecial Weather StatementMFLBroward38 min
Aug 28, 3:51 PM EDTSpecial Weather StatementMFLGlades39 min
Aug 28, 5:11 PM EDTSpecial Weather StatementMFLBroward49 min
Aug 28, 5:22 PM EDTSpecial Weather StatementMFLMonroe38 min
Aug 28, 5:26 PM EDTSevere Thunderstorm WarningMFLBroward38 min
Aug 28, 5:28 PM EDTSpecial Weather StatementMFLHendry47 min
Aug 28, 5:31 PM EDTSpecial Weather StatementMFLCollier44 min
Aug 28, 6:44 PM EDTSpecial Marine WarningMFL46 min
Aug 28, 6:58 PM EDTSpecial Weather StatementMFLPalm Beach47 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.