Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Miami, FL

April 6, 2012Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 6, 2012, 1:39 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 17 min. 1 report 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 6, 2012, 1:39 PM EDT (17:39 UTC)
Expired: Apr 6, 2012, 1:56 PM EDT
In force: 17 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

Counties Broward County, FL, Miami-Dade County, FL

The radar

The Miami radar (KAMX), 59 km from the middle of the area, began a volume at 17:40 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
Apr 6, 1:40 PM EDT	HAIL 1	Hollywood, FL	A TRAINED WEATHER SPOTTER REPORTED QUARTER SIZED HAIL 1 TO 2 MILES SOUTHEAST OF THE DRIFTWOOD ESTATES NEAR HOLLYWOOD BLVD AND SOUTH 28TH AVE

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, 5.7 hours before the alert went out and 32 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: 2930 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 478 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 257 m²/s²
Significant tornado parameter: 3.7
Supercell composite: 16.2

Open this sounding in Storm Lab

The text

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

862 
WUUS52 KMFL 061739
SVRMFL
FLC011-086-061815-
/O.NEW.KMFL.SV.W.0003.120406T1739Z-120406T1815Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
139 PM EDT FRI APR 6 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 215 PM EDT

* AT 136 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED NEAR NORTH PERRY AIRPORT...AND MOVING EAST AT 35 MPH.

* THE STORM WILL AFFECT...
  NORTH PERRY AIRPORT...
  HALLANDALE...
  AVENTURA...
  AND SURROUNDING COMMUNITIES.

LAT...LON 2615 8010 2613 8009 2600 8011 2598 8011
      2593 8011 2593 8012 2600 8033 2625 8019
      2622 8008
TIME...MOT...LOC 1739Z 280DEG 31KT 2601 8021

$$

AK

2 follow-up statements

842 
WWUS52 KMFL 061746
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
146 PM EDT FRI APR 6 2012

FLC011-086-061815-
/O.CON.KMFL.SV.W.0003.000000T0000Z-120406T1815Z/
BROWARD FL-MIAMI-DADE FL-
146 PM EDT FRI APR 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR EXTREME NORTHEASTERN MIAMI-DADE AND SOUTHEASTERN BROWARD
COUNTIES...

AT 140 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM PRODUCING LARGE HAIL...AND DAMAGING
WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR PEMBROKE 
PARK...MOVING EAST AT 35 MPH. A STORM SPOTTER IN HOLLYWOOD REPORTED 
QUARTER SIZED HAIL. ANOTHER STORM SPOTTER REPORTED A ROTATING WALL 
CLOUD NEAR HOLLYWOOD.

LAT...LON 2615 8010 2613 8009 2600 8011 2593 8011
      2593 8012 2598 8027 2624 8014 2622 8008
TIME...MOT...LOC 1745Z 280DEG 31KT 2600 8015

$$

AK

491 
WWUS52 KMFL 061756
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
156 PM EDT FRI APR 6 2012

FLC011-086-061805-
/O.CAN.KMFL.SV.W.0003.000000T0000Z-120406T1815Z/
BROWARD FL-MIAMI-DADE FL-
156 PM EDT FRI APR 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTHEASTERN
MIAMI-DADE AND SOUTHEASTERN BROWARD COUNTIES IS CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS 
MOVED INTO THE ATLANTIC WATERS. THUS THE THUNDERSTORM WARNING HAS 
BEEN CANCELLED.

LAT...LON 2615 8010 2613 8009 2600 8011 2593 8011
      2593 8012 2598 8027 2624 8014 2622 8008
TIME...MOT...LOC 1755Z 280DEG 31KT 2598 8006

$$

AK

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 9:09 AM EDT	Special Marine Warning	MFL		51 min
Apr 6, 9:29 AM EDT	Special Marine Warning	MFL		46 min
Apr 6, 9:48 AM EDT	Special Weather Statement	MFL	Collier	42 min
Apr 6, 9:53 AM EDT	Severe Thunderstorm Warning	MFL	Collier, Hendry	37 min
Apr 6, 10:12 AM EDT	Special Marine Warning	MFL		33 min
Apr 6, 10:13 AM EDT	Special Weather Statement	MFL	Collier	32 min
Apr 6, 10:50 AM EDT	Special Marine Warning	MFL		55 min
Apr 6, 11:18 AM EDT	Special Marine Warning	MFL		57 min
Apr 6, 11:21 AM EDT	Special Weather Statement	MFL	Collier	24 min
Apr 6, 11:39 AM EDT	Special Weather Statement	MFL	Broward	36 min
Apr 6, 11:46 AM EDT	Severe Thunderstorm Warning	MFL	Broward, Palm Beach	12 min
Apr 6, 11:51 AM EDT	Special Marine Warning	MFL		43 min
Apr 6, 1:00 PM EDT	Special Weather Statement	MFL	Broward	30 min
Apr 6, 1:29 PM EDT	Special Weather Statement	MFL	Broward	31 min
Apr 6, 1:42 PM EDT	Special Marine Warning	MFL		33 min
Apr 6, 1:58 PM EDT	Special Marine Warning	MFL		62 min
Apr 6, 2:56 PM EDT	Special Marine Warning	MFL		64 min
Apr 6, 3:36 PM EDT	Special Marine Warning	MFL		39 min
Apr 6, 4:00 PM EDT	Special Marine Warning	MFL		45 min
Apr 6, 4:13 PM EDT	Small Craft Advisory	MFL		48 hr

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.