Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 113, NWS Miami, FL

July 24, 2012Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jul 24, 2012, 5:23 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
Jul 24, 2012, 5:23 PM EDT (21:23 UTC)
Expired
Jul 24, 2012, 5:48 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), 135 km from the middle of the area, began a volume at 21:22 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 (KMIA), launched 12:00Z, 9.4 hours before the alert went out and 110 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 2012-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4148 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 2012-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
4148 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
501 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
2 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.

144 
WUUS52 KMFL 242123
SVRMFL
FLC099-242200-
/O.NEW.KMFL.SV.W.0113.120724T2123Z-120724T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
523 PM EDT TUE JUL 24 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 600 PM EDT

* AT 522 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 4 MILES NORTHEAST OF ROYAL PALM
  BEACH...AND MOVING NORTHEAST AT 20 MPH.

* THE STORM WILL AFFECT...
  RIVIERA BEACH...
  PALM BEACH GARDENS...
  NORTH PALM BEACH...
  JUNO BEACH...
  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.

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 2665 8018 2674 8030 2697 8008 2696 8007
      2687 8004 2680 8003 2675 8003
TIME...MOT...LOC 2123Z 227DEG 17KT 2675 8018

$$

AK
2 follow-up statements
916 
WWUS52 KMFL 242133
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
533 PM EDT TUE JUL 24 2012

FLC099-242200-
/O.CON.KMFL.SV.W.0113.000000T0000Z-120724T2200Z/
PALM BEACH FL-
533 PM EDT TUE JUL 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR EAST CENTRAL PALM BEACH COUNTY...

AT 532 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR MANGONIA PARK...MOVING
NORTHEAST AT 15 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 2665 8018 2673 8029 2691 8005 2687 8004
      2680 8003 2675 8003
TIME...MOT...LOC 2133Z 233DEG 18KT 2674 8012

$$

AK
271 
WWUS52 KMFL 242148
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
548 PM EDT TUE JUL 24 2012

FLC099-242158-
/O.CAN.KMFL.SV.W.0113.000000T0000Z-120724T2200Z/
PALM BEACH FL-
548 PM EDT TUE JUL 24 2012

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

THUNDERSTORMS REMAIN IN THE AREA. 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 2665 8018 2673 8029 2691 8005 2687 8004
      2680 8003 2675 8003
TIME...MOT...LOC 2148Z 233DEG 18KT 2678 8005

$$

AK

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 3:16 PM EDTSpecial Weather StatementMFLCollier29 min
Jul 24, 4:02 PM EDTSpecial Weather StatementMFLBroward28 min
Jul 24, 4:04 PM EDTSpecial Weather StatementMFLHendry26 min
Jul 24, 4:17 PM EDTSevere Thunderstorm WarningMFLCollier, Glades, Hendry21 min
Jul 24, 4:32 PM EDTSevere Thunderstorm WarningMFLPalm Beach14 min
Jul 24, 4:37 PM EDTSpecial Weather StatementMFLPalm Beach23 min
Jul 24, 4:40 PM EDTSpecial Weather StatementMFLGlades35 min
Jul 24, 4:45 PM EDTSpecial Marine WarningMFL42 min
Jul 24, 4:51 PM EDTSpecial Weather StatementMFLPalm Beach24 min
Jul 24, 4:58 PM EDTSevere Thunderstorm WarningMFLPalm Beach32 min
Jul 24, 5:18 PM EDTSpecial Weather StatementMFLPalm Beach42 min
Jul 24, 5:29 PM EDTSevere Thunderstorm WarningMFLPalm Beach31 min
Jul 24, 5:39 PM EDTSpecial Weather StatementMFLMartin36 min
Jul 24, 5:54 PM EDTSevere Thunderstorm WarningMFLPalm Beach29 min
Jul 24, 6:17 PM EDTSpecial Marine WarningMFL28 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.