Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 18, NWS Miami, FL

May 14, 2012Broward County, Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 14, 2012, 3:50 PM EDT for Broward County, Palm Beach County, Florida. It was in force for 25 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 14, 2012, 3:50 PM EDT (19:50 UTC)
Expired
May 14, 2012, 4:15 PM EDT
In force
25 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 75 km from the middle of the area, began a volume at 19:49 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, 7.8 hours before the alert went out and 54 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 2012-05-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1180 joules per kilogram.LCLEL10008507005003002001001 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 2012-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
1180 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
651 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

864 
WUUS52 KMFL 141950
SVRMFL
FLC011-099-142015-
/O.NEW.KMFL.SV.W.0018.120514T1950Z-120514T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
350 PM EDT MON MAY 14 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWEST BROWARD COUNTY IN SOUTH FLORIDA.
  SOUTHWEST PALM BEACH COUNTY IN SOUTH FLORIDA.

* UNTIL 415 PM EDT

* AT 345 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
  NORTH CENTRAL BROWARD COUNTY...AND MOVING SOUTHEAST AT 5 MPH.

* THE STORM WILL AFFECT...
  US 27
  RURAL NORTHERN BROWARD COUNTY
  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 2631 8029 2614 8045 2628 8062 2638 8051
TIME...MOT...LOC 1950Z 298DEG 6KT 2629 8049

$$

GARCIA
1 follow-up statement
054 
WWUS52 KMFL 142003
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
403 PM EDT MON MAY 14 2012

FLC011-099-142015-
/O.CON.KMFL.SV.W.0018.000000T0000Z-120514T2015Z/
BROWARD FL-PALM BEACH FL-
403 PM EDT MON MAY 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT 
FOR EXTREME SOUTHWEST PALM BEACH AND NORTHWEST BROWARD 
COUNTIES...

AT 401 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE HAIL...AND 
DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED OVER 
NORTHWEST BROWARD COUNTY ALONG US 27...MOVING SOUTHEAST AT 10 MPH.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI. OR YOU CAN
ALSO CALL THE NATIONAL WEATHER SERVICE IN MIAMI DIRECTLY AT
305.229.4528 TO REPORT SEVERE WEATHER.

LAT...LON 2627 8055 2635 8048 2631 8029 2614 8045
TIME...MOT...LOC 2002Z 308DEG 8KT 2626 8046

$$

GARCIA

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 8:53 AM EDTSpecial Marine WarningMFL22 min
May 14, 10:33 AM EDTSpecial Marine WarningMFL27 min
May 14, 3:32 PM EDTSpecial Weather StatementMFLBroward28 min
May 14, 4:17 PM EDTSpecial Weather StatementMFLBroward43 min
May 14, 4:46 PM EDTSevere Thunderstorm WarningMFLBroward29 min
May 14, 4:53 PM EDTSpecial Weather StatementMFLPalm Beach22 min
May 14, 5:16 PM EDTSevere Thunderstorm WarningMFLBroward29 min
May 14, 6:16 PM EDTSpecial Weather StatementMFLGlades29 min
May 14, 6:46 PM EDTSpecial Weather StatementMFLGlades29 min
May 14, 6:51 PM EDTSpecial Marine WarningMFL54 min
May 14, 7:19 PM EDTSpecial Weather StatementMFLGlades26 min
May 14, 7:25 PM EDTSevere Thunderstorm WarningMFLGlades38 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.