Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 10, NWS Miami, FL

May 8, 2012Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 8, 2012, 2:10 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 23 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
May 8, 2012, 2:10 PM EDT (18:10 UTC)
Expired
May 8, 2012, 2:33 PM EDT
In force
23 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

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

The radar

The Miami radar (KAMX), 55 km from the middle of the area, began a volume at 18:12 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, 6.2 hours before the alert went out and 29 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 2012-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 33 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 2012-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 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
33 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
1310 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
92 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

617 
WUUS52 KMFL 081810
SVRMFL
FLC011-086-081900-
/O.NEW.KMFL.SV.W.0010.120508T1810Z-120508T1900Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
210 PM EDT TUE MAY 8 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 300 PM EDT

* AT 207 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
  MIRAMAR PARKWAY AND UNIVERSITY DRIVE...AND MOVING NORTHEAST AT 15
  MPH.

* THE STORM WILL AFFECT...
  MIRAMAR PARKWAY AND UNIVERSITY DRIVE...
  NORTH PERRY AIRPORT...
  COOPER CITY...
  HOLLYWOOD...
  DANIA BEACH...
  FORT LAUDERDALE...
  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.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

&&

LAT...LON 2606 8010 2595 8017 2594 8032 2615 8029
      2613 8010 2609 8010
TIME...MOT...LOC 1810Z 209DEG 11KT 2598 8024

$$

BAXTER
1 follow-up statement
810 
WWUS52 KMFL 081833
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
233 PM EDT TUE MAY 8 2012

FLC011-086-081842-
/O.CAN.KMFL.SV.W.0010.000000T0000Z-120508T1900Z/
BROWARD FL-MIAMI-DADE FL-
233 PM EDT TUE MAY 8 2012

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

THE THUNDERSTORMS THAT PROMPTED THE WARNING HAVE WEAKEN BELOW SEVERE 
LIMITS. THEREFORE...THE SEVER THUNDERSTORM WARNING HAS BEEN CANCEL 
FOR EXTREME NORTHEAST MIAMI-DADE AND SOUTHEASTERN BROWARD COUNTY. 
THUNDERSTORMS REMAIN IN THE AREA WHICH CAN STILL PRODUCE FREQUENT 
LIGHTNING...GUSTY WINDS TO 40 MPH...VERY HEAVY RAINFALL AND SMALL 
HAIL ARE STILL POSSIBLE. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL 
MEDIA FOR THE LATEST UPDATES.

LAT...LON 2606 8010 2595 8017 2594 8032 2615 8029
      2613 8010 2609 8010
TIME...MOT...LOC 1832Z 209DEG 11KT 2604 8020

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 9:40 PM EDTSpecial Weather StatementMFLBroward50 min
May 7, 10:28 PM EDTSpecial Weather StatementMFLBroward32 min
May 8, 2:00 PM EDTSpecial Weather StatementMFLBroward45 min
May 8, 2:05 PM EDTSpecial Marine WarningMFL39 min
May 8, 2:16 PM EDTSpecial Weather StatementMFLHendry44 min
May 8, 2:30 PM EDTTornado WarningMFLPalm Beach18 min
May 8, 2:46 PM EDTSpecial Marine WarningMFL29 min
May 8, 2:58 PM EDTSpecial Weather StatementMFLBroward47 min
May 8, 3:01 PM EDTSpecial Weather StatementMFLMiami-Dade44 min
May 8, 3:08 PM EDTSpecial Weather StatementMFLHendry37 min
May 8, 3:14 PM EDTSpecial Marine WarningMFL61 min
May 8, 3:33 PM EDTAreal Flood AdvisoryMFLMiami-Dade117 min
May 8, 3:38 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach52 min
May 8, 3:42 PM EDTSpecial Weather StatementMFLGlades33 min
May 8, 3:48 PM EDTSpecial Weather StatementMFLBroward57 min
May 8, 3:53 PM EDTSpecial Marine WarningMFL112 min
May 8, 3:58 PM EDTSpecial Weather StatementMFLMiami-Dade32 min
May 8, 4:37 PM EDTSpecial Weather StatementMFLMiami-Dade38 min
May 8, 4:50 PM EDTSpecial Marine WarningMFL55 min
May 8, 4:53 PM EDTSpecial Weather StatementMFLMiami-Dade37 min
May 8, 5:21 PM EDTSpecial Weather StatementMFLMiami-Dade39 min
May 8, 5:35 PM EDTAreal Flood AdvisoryMFLMiami-Dade115 min
May 8, 5:38 PM EDTSpecial Marine WarningMFL82 min
May 8, 6:06 PM EDTSpecial Weather StatementMFLMiami-Dade39 min
May 8, 6:28 PM EDTSpecial Marine WarningMFL62 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.