Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 32, NWS Miami, FL

May 18, 2012Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 18, 2012, 2:08 PM EDT for Miami-Dade County, Florida. It was in force for 37 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, 2:08 PM EDT (18:08 UTC)
Expired: May 18, 2012, 2:45 PM EDT
In force: 37 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 21 km from the middle of the area, began a volume at 18:11 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

Time	Report	Where	Remark
May 18, 2:10 PM EDT	TSTM WND DMG	2 Wsw Doral, FL	TREES DOWNED NEAR THE INTERSECTION OF NW 64TH STREET AND NW 114TH AVENUE.
May 18, 2:10 PM EDT	TSTM WND DMG	3 W Sweetwater, FL	TREE DOWNED NEAR THE INTERSECTION OF SW 8TH STREET AND SW 139TH AVE.
May 18, 2:13 PM EDT	HAIL 0.75	2 Wsw Doral, FL	PENNY SIZED HAIL WAS REPORTED AT EUGENIA B. THOMAS SCHOOL IN DORAL.
May 18, 2:13 PM EDT	HAIL 0.75	Doral, FL	PENNY SIZED HAIL WAS REPORTED AT EUGENIA B THOMAS SCHOOL AT DORAL.
May 18, 2:15 PM EDT	TSTM WND DMG	Doral, FL	TREES 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 EDT	TSTM WND GST 60	Doral, FL	PUBLIC ESTIMATED WIND GUSTS TO 60 MPH IN DORAL.
May 18, 2:15 PM EDT	TSTM WND GST 70	6 Wsw Hialeah, FL	A 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 EDT	TSTM WND GST 70	Doral, FL	A MEMBER OF THE PUBLIC ESTIMATED WIND SPEEDS UP TO 70 MPH.
May 18, 2:15 PM EDT	HAIL 1.25	2 Ssw Doral, FL	HAIL SLIGHTLY LARGER THAN A QUARTER WAS REPORTED NEAR NW 41ST AND 107TH AVE IN DORAL
May 18, 2:15 PM EDT	HAIL 1.25	Doral, FL	HAIL SLIGHTLY LARGER THAN A QUARTER WAS REPORTED NEAR NW 41ST AND 107TH AVE AT DORAL.
May 18, 2:17 PM EDT	TSTM WND DMG	2 Wsw Doral, FL	AT LEAST TWO TREES SNAPPED NEAR THE EUGENIA B. THOMAS SCHOOL.
May 18, 2:17 PM EDT	HAIL 1	Doral, FL	QUARTER SIZED HAIL WAS REPORTED NEAR NW 41 AND NW 58TH STREETS
May 18, 2:20 PM EDT	TSTM WND DMG	2 Sw Doral, FL	LARGE TREE DOWNED NEAR 44TH STREET AND 113TH TERRACE IN DORAL.
May 18, 2:20 PM EDT	TSTM WND DMG	4 Wsw Hialeah, FL	LARGE TREE UPROOTED AND LIGHTPOLE DOWNED NEAR THE INTERSECTION OF NW 58TH STREET AND 95TH AVE.
May 18, 2:20 PM EDT	TSTM WND DMG	5 Wsw Hialeah, FL	AN 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 EDT	TSTM WND DMG	Doral, FL	AN 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 EDT	HAIL 1	4 Ssw Hialeah, FL	QUARTER SIZE HAIL REPORTED NEAR THE INTERSECTION OF PALMETTO EXPRESSWAY AND DORAL BLVD.
May 18, 2:33 PM EDT	TSTM WND GST 45	Medley, FL	A THUNDERSTORM PRODUCED A WIND GUST ESTIMATED BETWEEN 40 AND 50 MPH IN MEDLEY.

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, 6.1 hours before the alert went out and 7 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

070 
WUUS52 KMFL 181808
SVRMFL
FLC086-181845-
/O.NEW.KMFL.SV.W.0032.120518T1808Z-120518T1845Z/

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

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 245 PM EDT

* AT 206 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
  SWEETWATER...AND MOVING EAST AT 10 MPH.

* THE STORM WILL AFFECT...
  SWEETWATER...
  WESTCHESTER...
  DORAL...
  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 2572 8024 2569 8024 2568 8043 2581 8049
      2594 8021 2575 8018
TIME...MOT...LOC 1808Z 255DEG 6KT 2576 8041

$$

MJB

2 follow-up statements

960 
WWUS52 KMFL 181814
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
214 PM EDT FRI MAY 18 2012

FLC086-181845-
/O.CON.KMFL.SV.W.0032.000000T0000Z-120518T1845Z/
MIAMI-DADE FL-
214 PM EDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTHEASTERN MIAMI-DADE COUNTY...

AT 211 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED. GOLF BALL SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS 
LOCATED NEAR FIU SOUTH CAMPUS...MOVING EAST NORTHEAST AT 10 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 58
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 2572 8024 2569 8024 2568 8043 2581 8049
      2594 8021 2575 8018
TIME...MOT...LOC 1814Z 255DEG 6KT 2576 8040

$$

MJB

015 
WWUS52 KMFL 181825
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
225 PM EDT FRI MAY 18 2012

FLC086-181845-
/O.CON.KMFL.SV.W.0032.000000T0000Z-120518T1845Z/
MIAMI-DADE FL-
225 PM EDT FRI MAY 18 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 245 PM EDT
FOR NORTHEASTERN MIAMI-DADE COUNTY...

AT 220 PM EDT...A SEVERE THUNDERSTORM WAS REPORTED. QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR DORAL...MOVING NORTHEAST AT 15 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 58
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 2572 8024 2569 8024 2568 8043 2581 8049
      2594 8021 2575 8018
TIME...MOT...LOC 1825Z 242DEG 17KT 2583 8032

$$

MJB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 8:02 PM EDT	Special Weather Statement	MFL	Palm Beach	28 min
May 17, 8:52 PM EDT	Special Weather Statement	MFL	Palm Beach	38 min
May 17, 9:14 PM EDT	Special Marine Warning	MFL		61 min
May 17, 9:20 PM EDT	Areal Flood Advisory	MFL	Palm Beach	76 min
May 17, 9:30 PM EDT	Special Weather Statement	MFL	Palm Beach	30 min
May 18, 1:16 PM EDT	Special Weather Statement	MFL	Broward	29 min
May 18, 1:26 PM EDT	Special Weather Statement	MFL	Miami-Dade	49 min
May 18, 1:29 PM EDT	Special Marine Warning	MFL		61 min
May 18, 1:45 PM EDT	Special Marine Warning	MFL		60 min
May 18, 1:46 PM EDT	Special Weather Statement	MFL	Palm Beach	29 min
May 18, 1:49 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	26 min
May 18, 1:52 PM EDT	Severe Thunderstorm Warning	MFL	Miami-Dade	38 min
May 18, 2:07 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	23 min
May 18, 2:18 PM EDT	Special Weather Statement	MFL	Palm Beach	12 min
May 18, 2:25 PM EDT	Special Marine Warning	MFL		95 min
May 18, 2:28 PM EDT	Severe Thunderstorm Warning	MFL	Broward, Miami-Dade	26 min
May 18, 2:36 PM EDT	Special Marine Warning	MFL		54 min
May 18, 2:40 PM EDT	Special Weather Statement	MFL	Miami-Dade	35 min
May 18, 2:44 PM EDT	Special Weather Statement	MFL	Broward	46 min
May 18, 2:53 PM EDT	Special Weather Statement	MFL	Broward	37 min
May 18, 3:23 PM EDT	Areal Flood Advisory	MFL	Broward	112 min
May 18, 3:28 PM EDT	Special Weather Statement	MFL	Broward	32 min
May 18, 3:33 PM EDT	Special Marine Warning	MFL		87 min
May 18, 3:39 PM EDT	Special Weather Statement	MFL	Broward	51 min
May 18, 3:43 PM EDT	Special Weather Statement	MFL	Palm Beach	47 min
May 18, 3:58 PM EDT	Severe Thunderstorm Warning	MFL	Broward	18 min
May 18, 4:05 PM EDT	Special Weather Statement	MFL	Hendry	40 min
May 18, 4:14 PM EDT	Special Marine Warning	MFL		91 min
May 18, 4:14 PM EDT	Severe Thunderstorm Warning	MFL	Hendry, Palm Beach	46 min
May 18, 4:18 PM EDT	Special Weather Statement	MFL	Broward	42 min
May 18, 4:39 PM EDT	Special Marine Warning	MFL		81 min
May 18, 5:02 PM EDT	Special Weather Statement	MFL	Miami-Dade	28 min
May 18, 5:09 PM EDT	Special Marine Warning	MFL		81 min
May 18, 5:32 PM EDT	Special Weather Statement	MFL	Hendry	28 min
May 18, 5:58 PM EDT	Special Marine Warning	MFL		62 min
May 18, 6:17 PM EDT	Special Marine Warning	MFL		58 min
May 18, 6:31 PM EDT	Special Weather Statement	MFL	Miami-Dade	29 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every 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.