Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 30, NWS Miami, FL

May 18, 2012Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 18, 2012, 1:52 PM EDT for Miami-Dade County, Florida. It was in force for 38 min. 18 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
May 18, 2012, 1:52 PM EDT (17:52 UTC)
Expired
May 18, 2012, 2:30 PM EDT
In force
38 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 23 km from the middle of the area, began a volume at 17:52 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
May 18, 2:00 PM EDTTSTM WND DMG4 Nnw Kendale Lakes, FLLARGE TREE BRANCHES BROKEN OFF NEAR SW 8TH STREET AND SW 147TH AVE.
May 18, 2:10 PM EDTTSTM WND DMG2 Wsw Doral, FLTREES DOWNED NEAR THE INTERSECTION OF NW 64TH STREET AND NW 114TH AVENUE.
May 18, 2:10 PM EDTTSTM WND DMG3 W Sweetwater, FLTREE DOWNED NEAR THE INTERSECTION OF SW 8TH STREET AND SW 139TH AVE.
May 18, 2:13 PM EDTHAIL 0.752 Wsw Doral, FLPENNY SIZED HAIL WAS REPORTED AT EUGENIA B. THOMAS SCHOOL IN DORAL.
May 18, 2:13 PM EDTHAIL 0.75Doral, FLPENNY SIZED HAIL WAS REPORTED AT EUGENIA B THOMAS SCHOOL AT DORAL.
May 18, 2:15 PM EDTTSTM WND DMGDoral, FLTREES DOWN AND WINDOW SCREENS BLOWN OUT IN BALMORAL ESTATES AND DORAL ISLES IN DORAL. WINDS ESTIMATED 60 TO 70 MPH.
May 18, 2:15 PM EDTTSTM WND GST 60Doral, FLPUBLIC ESTIMATED WIND GUSTS TO 60 MPH IN DORAL.
May 18, 2:15 PM EDTTSTM WND GST 706 Wsw Hialeah, FLA MEMBER OF THE PUBLIC ESTIMATED WIND SPEEDS UP TO 70 MPH NEAR THE INTERSECTION OF NW 58TH STREET AND NW 107TH AVE. IN DORAL
May 18, 2:15 PM EDTTSTM WND GST 70Doral, FLA MEMBER OF THE PUBLIC ESTIMATED WIND SPEEDS UP TO 70 MPH.
May 18, 2:15 PM EDTHAIL 1.252 Ssw Doral, FLHAIL SLIGHTLY LARGER THAN A QUARTER WAS REPORTED NEAR NW 41ST AND 107TH AVE IN DORAL
May 18, 2:15 PM EDTHAIL 1.25Doral, FLHAIL SLIGHTLY LARGER THAN A QUARTER WAS REPORTED NEAR NW 41ST AND 107TH AVE AT DORAL.
May 18, 2:17 PM EDTTSTM WND DMG2 Wsw Doral, FLAT LEAST TWO TREES SNAPPED NEAR THE EUGENIA B. THOMAS SCHOOL.
May 18, 2:17 PM EDTHAIL 1Doral, FLQUARTER SIZED HAIL WAS REPORTED NEAR NW 41 AND NW 58TH STREETS
May 18, 2:20 PM EDTTSTM WND DMG2 Sw Doral, FLLARGE TREE DOWNED NEAR 44TH STREET AND 113TH TERRACE IN DORAL.
May 18, 2:20 PM EDTTSTM WND DMG4 Wsw Hialeah, FLLARGE TREE UPROOTED AND LIGHTPOLE DOWNED NEAR THE INTERSECTION OF NW 58TH STREET AND 95TH AVE.
May 18, 2:20 PM EDTTSTM WND DMG5 Wsw Hialeah, FLAN OFF DUTY NWS EMPLOYEE REPORTED A LARGE TREE DOWN ON NORTHWEST 58TH ST IN DORAL BETWEEN NORTHWEST 102 AVE AND NORTHWEST 107 AVE.
May 18, 2:20 PM EDTTSTM WND DMGDoral, FLAN OFF DUTY NWS EMPLOYEE REPORTED A LARGE TREE DOWN ON NORTHWEST 58TH ST IN DORAL BETWEEN NORTHWEST 102 AVE AND NORTHWEST 107 AVE.
May 18, 2:20 PM EDTHAIL 14 Ssw Hialeah, FLQUARTER SIZE HAIL REPORTED NEAR THE INTERSECTION OF PALMETTO EXPRESSWAY AND DORAL BLVD.

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, 5.9 hours before the alert went out and 12 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 2012-05-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1355 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2012-05-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 16 square meters per square second.1939587897Sfc1 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
1355 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
572 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
16 m²/s²
0-3 km storm-relative helicity
71 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.5

Open this sounding in Storm Lab

The text

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

734 
WUUS52 KMFL 181752
SVRMFL
FLC086-181830-
/O.NEW.KMFL.SV.W.0030.120518T1752Z-120518T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
152 PM EDT FRI MAY 18 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL MIAMI-DADE COUNTY IN SOUTH FLORIDA.

* UNTIL 230 PM EDT

* AT 147 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  THE HAMMOCKS...AND MOVING EAST AT 20 MPH.

* THE STORM WILL AFFECT...
  THE HAMMOCKS...
  WEST KENDALL...
  SWEETWATER...
  KENDALL...
  SOUTH MIAMI...
  UNIVERSITY OF MIAMI...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND
OR LARGE HAIL. FREQUENT TO EXCESSIVE LIGHTNING AND HEAVY RAINFALL IS
ALSO POSSIBLE. IF THE STORM APPROACHES YOUR LOCATION, SEEK SHELTER IN
AN ENCLOSED BUILDING ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 2580 8011 2573 8014 2567 8015 2566 8016
      2568 8018 2574 8017 2574 8020 2572 8024
      2565 8026 2560 8030 2552 8057 2575 8060
      2593 8012 2591 8010
TIME...MOT...LOC 1751Z 251DEG 16KT 2567 8042

$$

MJB

The office that day

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

IssuedProductOfficeCountiesLasted
May 17, 8:02 PM EDTSpecial Weather StatementMFLPalm Beach28 min
May 17, 8:52 PM EDTSpecial Weather StatementMFLPalm Beach38 min
May 17, 9:14 PM EDTSpecial Marine WarningMFL61 min
May 17, 9:20 PM EDTAreal Flood AdvisoryMFLPalm Beach76 min
May 17, 9:30 PM EDTSpecial Weather StatementMFLPalm Beach30 min
May 18, 1:16 PM EDTSpecial Weather StatementMFLBroward29 min
May 18, 1:26 PM EDTSpecial Weather StatementMFLMiami-Dade49 min
May 18, 1:29 PM EDTSpecial Marine WarningMFL61 min
May 18, 1:45 PM EDTSpecial Marine WarningMFL60 min
May 18, 1:46 PM EDTSpecial Weather StatementMFLPalm Beach29 min
May 18, 1:49 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach26 min
May 18, 2:07 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach23 min
May 18, 2:08 PM EDTSevere Thunderstorm WarningMFLMiami-Dade37 min
May 18, 2:18 PM EDTSpecial Weather StatementMFLPalm Beach12 min
May 18, 2:25 PM EDTSpecial Marine WarningMFL95 min
May 18, 2:28 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade26 min
May 18, 2:36 PM EDTSpecial Marine WarningMFL54 min
May 18, 2:40 PM EDTSpecial Weather StatementMFLMiami-Dade35 min
May 18, 2:44 PM EDTSpecial Weather StatementMFLBroward46 min
May 18, 2:53 PM EDTSpecial Weather StatementMFLBroward37 min
May 18, 3:23 PM EDTAreal Flood AdvisoryMFLBroward112 min
May 18, 3:28 PM EDTSpecial Weather StatementMFLBroward32 min
May 18, 3:33 PM EDTSpecial Marine WarningMFL87 min
May 18, 3:39 PM EDTSpecial Weather StatementMFLBroward51 min
May 18, 3:43 PM EDTSpecial Weather StatementMFLPalm Beach47 min
May 18, 3:58 PM EDTSevere Thunderstorm WarningMFLBroward18 min
May 18, 4:05 PM EDTSpecial Weather StatementMFLHendry40 min
May 18, 4:14 PM EDTSpecial Marine WarningMFL91 min
May 18, 4:14 PM EDTSevere Thunderstorm WarningMFLHendry, Palm Beach46 min
May 18, 4:18 PM EDTSpecial Weather StatementMFLBroward42 min
May 18, 4:39 PM EDTSpecial Marine WarningMFL81 min
May 18, 5:02 PM EDTSpecial Weather StatementMFLMiami-Dade28 min
May 18, 5:09 PM EDTSpecial Marine WarningMFL81 min
May 18, 5:32 PM EDTSpecial Weather StatementMFLHendry28 min
May 18, 5:58 PM EDTSpecial Marine WarningMFL62 min
May 18, 6:17 PM EDTSpecial Marine WarningMFL58 min
May 18, 6:31 PM EDTSpecial Weather StatementMFLMiami-Dade29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012Every severe thunderstorm warning in 2012

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.