Alert archive / Florida / Special Weather Statements in 2015

Special Weather Statement, NWS Miami, FL

April 20, 2015Broward County, Florida

NWS Miami, FL issued this special weather statement at Apr 20, 2015, 1:08 PM EDT for Broward County, Florida. It was in force for 22 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 20, 2015, 1:08 PM EDT (17:08 UTC)
Expired
Apr 20, 2015, 1:30 PM EDT
In force
22 min
Issued by
NWS Miami, FL

County Broward County, FL

The radar

The Miami radar (KAMX), 47 km from the middle of the area, began a volume at 17:10 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.

What was reported inside it

TimeReportWhereRemark
Apr 20, 1:23 PM EDTHAIL 0.25Miami Lakes, FL
Apr 20, 1:33 PM EDTFUNNEL CLOUDMiami Springs, FLFUNNEL SIGHTED TO THE NORTHEAST OF SWEETWATER. POSITION ESTIMATED BY RADAR.
Apr 20, 1:40 PM EDTHAIL 1Miami Springs, FLTIME ESTIMATED VIA RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 5.1 hours before the alert went out and 21 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 2015-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2085 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 2015-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 square meters per square second.193958Sfc1 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
2085 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
784 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

097 
WWUS82 KMFL 201708
SPSMFL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
108 PM EDT MON APR 20 2015
 
FLZ072>074-172-173-201730-
COASTAL MIAMI DADE COUNTY FL-METROPOLITAN MIAMI DADE FL-INLAND MIAMI-
DADE COUNTY FL-METRO BROWARD COUNTY FL-COASTAL BROWARD COUNTY FL-
108 PM EDT MON APR 20 2015

...SIGNIFICANT WEATHER ADVISORY FOR UP TO NICKEL SIZED HAIL FOR
SOUTHEASTERN BROWARD AND NORTHEASTERN MIAMI-DADE COUNTIES UNTIL 130
PM EDT...

* AT 107 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
  OVER MIAMI LAKES...OR OVER HIALEAH...MOVING NORTHEAST AT 25 MPH.

* THE PRIMARY IMPACTS WILL BE UP TO NICKEL SIZED HAIL. SEEK SHELTER
  IN A SAFE BUILDING UNTIL THE STORM PASSES.

* LOCATIONS IMPACTED INCLUDE...
  MIAMI...HIALEAH...FORT LAUDERDALE...PEMBROKE PINES...HOLLYWOOD...
  MIRAMAR...DAVIE...MIAMI BEACH...SURFSIDE...MIAMI GARDENS...
  HALLANDALE...NORTH MIAMI...DORAL...NORTH MIAMI BEACH...AVENTURA...
  DANIA BEACH...MIAMI LAKES...COOPER CITY...HIALEAH GARDENS AND SUNNY
  ISLES BEACH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 700 PM EDT FOR
SOUTHEASTERN FLORIDA.

LAT...LON 2609 8011 2611 8012 2592 8013 2591 8014
      2591 8011 2586 8012 2585 8014 2588 8016
      2586 8018 2584 8015 2584 8016 2577 8031
      2591 8043 2615 8013 2611 8011 2612 8011
      2612 8010
TIME...MOT...LOC 1707Z 235DEG 22KT 2589 8031 

$$

SI

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 20, 1:30 PM EDTSpecial Weather StatementMFLBroward45 min
Apr 20, 1:33 PM EDTTornado WarningMFLMiami-Dade27 min
Apr 20, 2:01 PM EDTSpecial Marine WarningMFL29 min
Apr 20, 2:05 PM EDTSpecial Weather StatementMFLGlades25 min
Apr 20, 2:15 PM EDTSpecial Weather StatementMFLPalm Beach45 min
Apr 20, 2:54 PM EDTSpecial Weather StatementMFLPalm Beach36 min
Apr 20, 3:11 PM EDTSpecial Weather StatementMFLPalm Beach49 min
Apr 20, 3:15 PM EDTSpecial Marine WarningMFL60 min
Apr 20, 3:59 PM EDTSpecial Weather StatementMFLMartin31 min
Apr 20, 4:13 PM EDTSpecial Weather StatementMFLPalm Beach47 min
Apr 20, 4:16 PM EDTSpecial Marine WarningMFL59 min
Apr 20, 4:53 PM EDTSpecial Weather StatementMFLPalm Beach22 min
Apr 20, 5:10 PM EDTSpecial Marine WarningMFL65 min
Apr 20, 5:19 PM EDTSpecial Weather StatementMFLBroward41 min
Apr 20, 5:49 PM EDTSpecial Marine WarningMFL26 min
Apr 20, 6:22 PM EDTSpecial Marine WarningMFL23 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.