Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, NWS Miami, FL

April 22, 2012Broward County, Miami-Dade County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Apr 22, 2012, 12:41 PM EDT for Broward County, Miami-Dade County, Florida. It was in force for 35 min. 4 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 22, 2012, 12:41 PM EDT (16:41 UTC)
Expired
Apr 22, 2012, 1:16 PM EDT
In force
35 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

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

The radar

The Miami radar (KAMX), 43 km from the middle of the area, began a volume at 16:40 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

TimeReportWhereRemark
Apr 22, 12:49 PM EDTNON-TSTM WND GST 43Virginia Gardens, FLAT 1249 PM...THE ASOS AT MIAMI INTERNATIONAL AIRPORT RECORDED A SOUTHWEST WIND GUST OF 37 KTS...OR 43 MPH.
Apr 22, 12:50 PM EDTTSTM WND GST 46Plantation, FLA MEMBER OF THE PUBLIC ESTIMATED WIND GUSTS TO 40 KTS...OR 46 MPH...NEAR THE INTERSECTION OF UNIVERSITY DRIVE AND WEST BROWARD BOULEVARD IN PLANTATION.
Apr 22, 12:55 PM EDTTSTM WND DMGPlantation, FLA TREE OF 12 TO 18 INCHES IN DIAMETER WAS SNAPPED AT THE INTERSECTION OF NOB HILL RD AND CLEARY BLVD.
Apr 22, 12:56 PM EDTTSTM WND GST 54Fort Lauderdale, FLA THUNDERSTORM PRODUCED A WIND GUST OF 54 MPH AT FORT LAUDERDALE EXECUTIVE AIRPORT.

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, 4.7 hours before the alert went out and 16 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 2012-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 509 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 2012-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.1939587897117136Sfc1 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
509 J/kg
Mixed-layer CIN
-12 J/kg
Mixed-layer LCL
733 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
-0.1
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

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

034 
WUUS52 KMFL 221641
SVRMFL
FLC011-086-221745-
/O.NEW.KMFL.SV.W.0009.120422T1641Z-120422T1745Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
1241 PM EDT SUN APR 22 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BROWARD COUNTY IN SOUTH FLORIDA, INCLUDING THE FORT
  LAUDERDALE METRO AREA...AND
  FAR NORTHERN MIAMI-DADE COUNTY IN SOUTH FLORIDA.

* UNTIL 145 PM EDT

* AT 1236 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SHOWERS AND POSSIBLE EMBEDDED THUNDERSTORMS CAPABLE OF 
  PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE 
  LOCATED ALONG A LINE EXTENDING FROM PARKLAND TO 18 MILES WEST OF 
  INTERSECTION KROME AND U.S. 27...AND MOVING SOUTHEAST AT 30 MPH.

* THE LINE OF STORMS WILL AFFECT...
  INTERSECTION I-75 AND U.S. 27...
  WESTON...
  COCONUT CREEK...
  DEERFIELD BEACH...
  POMPANO BEACH...
  COOPER CITY...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH AND
OR LARGE DESTRUCTIVE 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 2600 8011 2590 8010 2589 8011 2584 8012
      2584 8014 2585 8015 2588 8015 2583 8017
      2578 8037 2589 8082 2633 8032 2631 8007
TIME...MOT...LOC 1639Z 303DEG 25KT 2630 8027 2590 8069

$$

MJB
3 follow-up statements
142 
WWUS52 KMFL 221657
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1257 PM EDT SUN APR 22 2012

FLC011-086-221745-
/O.CON.KMFL.SV.W.0009.000000T0000Z-120422T1745Z/
BROWARD FL-MIAMI-DADE FL-
1257 PM EDT SUN APR 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR FAR NORTHERN MIAMI-DADE AND EASTERN BROWARD COUNTIES INCLUDING
THE FORT LAUDERDALE METRO AREA...

AT 1255 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SHOWERS AND EMBEDDED THUNDERSTORMS CAPABLE OF 
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS ACTIVITY WAS 
LOCATED ALONG A LIN EXTENDING FROM COCONUT CREEK TO 13 MILES 
SOUTHWEST OF INTERSECTION KROME AND U.S. 27...MOVING SOUTHEAST AT 30 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH..,DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 2585 8062 2632 8021 2631 8007 2600 8011
      2590 8010 2589 8011 2584 8012 2584 8014
      2585 8015 2588 8015 2583 8017 2578 8037
TIME...MOT...LOC 1655Z 303DEG 25KT 2624 8017 2584 8059

$$

MJB
073 
WWUS52 KMFL 221707
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
107 PM EDT SUN APR 22 2012

FLC086-221715-
/O.CAN.KMFL.SV.W.0009.000000T0000Z-120422T1745Z/
MIAMI-DADE FL-
107 PM EDT SUN APR 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIAMI-DADE COUNTY
IS CANCELLED...

THE PORTION OF THE LINE OF THUNDERSTORMS TO AFFECT MIAMI-DADE
COUNTY HAS WEAKENED SIGNIFICANTLY.

LAT...LON 2600 8011 2599 8024 2597 8052 2632 8021
      2631 8007
TIME...MOT...LOC 1705Z 302DEG 31KT 2626 8002 2596 8034

$$

FLC011-221745-
/O.CON.KMFL.SV.W.0009.000000T0000Z-120422T1745Z/
BROWARD FL-
107 PM EDT SUN APR 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 145 PM EDT
FOR EASTERN BROWARD COUNTY...

AT 104 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM HILLSBORO BEACH TO MIRAMAR...MOVING SOUTHEAST AT 35
MPH.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 60
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 2600 8011 2599 8024 2597 8052 2632 8021
      2631 8007
TIME...MOT...LOC 1705Z 302DEG 31KT 2626 8002 2596 8034

$$

MJB
229 
WWUS52 KMFL 221716
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
116 PM EDT SUN APR 22 2012

FLC011-221725-
/O.CAN.KMFL.SV.W.0009.000000T0000Z-120422T1745Z/
BROWARD FL-
116 PM EDT SUN APR 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BROWARD COUNTY IS
CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS
DISSIPATED. THUS THE THUNDERSTORM WARNING HAS BEEN CANCELLED.

LAT...LON 2600 8011 2599 8024 2597 8052 2632 8021
      2631 8007
TIME...MOT...LOC 1715Z 302DEG 31KT 2621 7994 2591 8026

$$

MJB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 22, 12:16 AM EDTSpecial Weather StatementMFLBroward74 min
Apr 22, 1:22 AM EDTSpecial Marine WarningMFL53 min
Apr 22, 1:47 AM EDTSpecial Weather StatementMFLCollier, Glades, Hendry58 min
Apr 22, 1:58 AM EDTSevere Thunderstorm WarningMFLGlades32 min
Apr 22, 2:12 AM EDTSpecial Marine WarningMFL63 min
Apr 22, 2:18 AM EDTSevere Thunderstorm WarningMFLGlades42 min
Apr 22, 2:26 AM EDTSpecial Marine WarningMFL64 min
Apr 22, 2:46 AM EDTSpecial Weather StatementMFLCollier, Glades, Hendry59 min
Apr 22, 2:57 AM EDTSevere Thunderstorm WarningMFLGlades33 min
Apr 22, 3:13 AM EDTSpecial Marine WarningMFL62 min
Apr 22, 3:22 AM EDTSpecial Marine WarningMFL38 min
Apr 22, 3:43 AM EDTSpecial Weather StatementMFLHendry62 min
Apr 22, 4:35 AM EDTSpecial Weather StatementMFLBroward, Miami-Dade, Palm Beach55 min
Apr 22, 4:49 AM EDTWind AdvisoryMFLBroward, Collier, Miami-Dade, Monroe12 hr
Apr 22, 5:02 AM EDTSpecial Marine WarningMFL106 min
Apr 22, 5:26 AM EDTSpecial Weather StatementMFLMiami-Dade49 min
Apr 22, 12:00 PM EDTSpecial Marine WarningMFL60 min
Apr 22, 12:52 PM EDTSpecial Marine WarningMFL83 min
Apr 22, 1:36 PM EDTSpecial Marine WarningMFL54 min
Apr 22, 1:46 PM EDTSpecial Marine WarningMFL44 min
Apr 22, 2:12 PM EDTSpecial Marine WarningMFL63 min
Apr 22, 3:47 PM EDTSpecial Marine WarningMFL31 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.