Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 76, NWS Miami, FL

June 13, 2012Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 13, 2012, 9:09 PM EDT for 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
Jun 13, 2012, 9:09 PM EDT (01:09 UTC)
Expired
Jun 13, 2012, 9:34 PM EDT
In force
25 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 126 km from the middle of the area, began a volume at 01:12 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 00:00Z, 1.2 hours before the alert went out and 103 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 00:00Z on 2012-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 934 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 00:00Z on 2012-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
934 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1234 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

753 
WUUS52 KMFL 140109
SVRMFL
FLC099-140145-
/O.NEW.KMFL.SV.W.0076.120614T0109Z-120614T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
909 PM EDT WED JUN 13 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL PALM BEACH COUNTY IN SOUTH FLORIDA.

* UNTIL 945 PM EDT

* AT 907 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES WEST OF LION COUNTRY
  SAFARI...AND MOVING EAST AT 15 MPH.

* THE STORM WILL AFFECT...
  LION COUNTRY SAFARI...
  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 2682 8027 2656 8036 2668 8061 2684 8056
TIME...MOT...LOC 0108Z 278DEG 14KT 2674 8050

$$

GARCIA
1 follow-up statement
484 
WWUS52 KMFL 140134
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
934 PM EDT WED JUN 13 2012

FLC099-140143-
/O.CAN.KMFL.SV.W.0076.000000T0000Z-120614T0145Z/
PALM BEACH FL-
934 PM EDT WED JUN 13 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL PALM BEACH COUNTY IS
CANCELLED...

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

HOWEVER...THUNDERSTORMS REMAIN IN THE AREA. FREQUENT 
LIGHTNING...GUSTY WINDS TO 50 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 2682 8027 2656 8036 2668 8061 2684 8056
TIME...MOT...LOC 0133Z 278DEG 14KT 2673 8039

$$

GARCIA

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 13, 8:23 PM EDTSpecial Weather StatementMFLPalm Beach37 min
Jun 13, 8:59 PM EDTSpecial Weather StatementMFLPalm Beach46 min
Jun 13, 9:28 PM EDTSpecial Weather StatementMFLPalm Beach32 min
Jun 13, 9:55 PM EDTSpecial Weather StatementMFLBroward35 min
Jun 13, 10:21 PM EDTSpecial Weather StatementMFLBroward39 min
Jun 14, 5:48 PM EDTSpecial Weather StatementMFLGlades27 min
Jun 14, 6:11 PM EDTSpecial Weather StatementMFLGlades34 min
Jun 14, 6:15 PM EDTSpecial Marine WarningMFL60 min
Jun 14, 6:46 PM EDTSpecial Weather StatementMFLGlades29 min
Jun 14, 7:01 PM EDTSpecial Weather StatementMFLHendry29 min
Jun 14, 7:11 PM EDTSpecial Marine WarningMFL64 min
Jun 14, 7:27 PM EDTSpecial Weather StatementMFLHendry48 min
Jun 14, 7:36 PM EDTSevere Thunderstorm WarningMFLHendry, Palm Beach24 min
Jun 14, 7:53 PM EDTSpecial Weather StatementMFLMiami-Dade67 min
Jun 14, 7:58 PM EDTSpecial Weather StatementMFLBroward32 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.