Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 52, NWS Miami, FL

May 28, 2012Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 28, 2012, 4:35 PM EDT for Palm Beach County, Florida. It was in force for 55 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 28, 2012, 4:35 PM EDT (20:35 UTC)
Expired
May 28, 2012, 5:30 PM EDT
In force
55 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Palm Beach County, FL

The radar

The Miami radar (KAMX), 129 km from the middle of the area, began a volume at 20:35 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, 8.6 hours before the alert went out and 104 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 2012-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1204 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 2012-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
1204 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
8 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.

669 
WUUS52 KMFL 282035
SVRMFL
FLC099-282130-
/O.NEW.KMFL.SV.W.0052.120528T2035Z-120528T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
435 PM EDT MON MAY 28 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 530 PM EDT

* AT 431 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
  WELLINGTON...AND MOVING NORTH AT 20 MPH.

* THE STORM WILL AFFECT...
  GREENACRES CITY...
  WELLINGTON...
  ROYAL PALM BEACH...
  RIVIERA BEACH...
  NORTH COUNTY AIRPORT...
  PALM BEACH GARDENS...
  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 2657 8015 2659 8045 2696 8049 2696 8007
      2688 8005
TIME...MOT...LOC 2035Z 195DEG 19KT 2666 8028

$$

MJB
1 follow-up statement
419 
WWUS52 KMFL 282105
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
505 PM EDT MON MAY 28 2012

FLC099-282130-
/O.CON.KMFL.SV.W.0052.000000T0000Z-120528T2130Z/
PALM BEACH FL-
505 PM EDT MON MAY 28 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR NORTHEASTERN PALM BEACH COUNTY...

AT 501 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS 
IN EXCESS OF 60 MPH AND QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR 
ROYAL PALM BEACH...MOVING NORTH AT 20 MPH.

SEVERE THUNDERSTORMS CAN PRODUCE VERY STRONG WINDS IN EXCESS OF 58
MPH...LARGE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAINFALL. STAY
INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 2657 8015 2659 8045 2696 8049 2696 8007
      2688 8005
TIME...MOT...LOC 2105Z 195DEG 19KT 2675 8024

$$

MJB

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 2:53 PM EDTSpecial Weather StatementMFLPalm Beach52 min
May 28, 3:21 PM EDTSpecial Weather StatementMFLHendry39 min
May 28, 3:23 PM EDTSpecial Weather StatementMFLBroward52 min
May 28, 3:30 PM EDTSpecial Weather StatementMFLPalm Beach30 min
May 28, 3:48 PM EDTSpecial Weather StatementMFLPalm Beach42 min
May 28, 3:59 PM EDTSevere Thunderstorm WarningMFLPalm Beach46 min
May 28, 4:08 PM EDTSpecial Weather StatementMFLBroward52 min
May 28, 4:42 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach48 min
May 28, 5:30 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade, Palm Beach90 min
May 28, 6:12 PM EDTSpecial Marine WarningMFL93 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.