Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 38, NWS Miami, FL

May 19, 2012Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 19, 2012, 3:47 PM EDT for Palm Beach County, Florida. It was in force for 16 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 19, 2012, 3:47 PM EDT (19:47 UTC)
Expired
May 19, 2012, 4:03 PM EDT
In force
16 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Palm Beach County, FL

The radar

The Melbourne radar (KMLB), 136 km from the middle of the area, began a volume at 19:47 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 124 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 2012-05-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1791 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 2012-05-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.1939587897Sfc1 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
1791 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
625 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.9

Open this sounding in Storm Lab

The text

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

188 
WUUS52 KMFL 191947
SVRMFL
FLC099-192015-
/O.NEW.KMFL.SV.W.0038.120519T1947Z-120519T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
347 PM EDT SAT MAY 19 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 415 PM EDT

* AT 344 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES WEST OF NORTH COUNTY
  AIRPORT...AND MOVING NORTHEAST AT 25 MPH.

* THE STORM WILL AFFECT...
  NORTH COUNTY AIRPORT...
  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 2696 8015 2695 8015 2684 8021 2693 8047
      2696 8045 2696 8024 2696 8023 2696 8015
      2697 8013
TIME...MOT...LOC 1948Z 209DEG 23KT 2690 8033

$$

AK
1 follow-up statement
420 
WWUS52 KMFL 192003
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
403 PM EDT SAT MAY 19 2012

FLC099-192013-
/O.CAN.KMFL.SV.W.0038.000000T0000Z-120519T2015Z/
PALM BEACH FL-
403 PM EDT SAT MAY 19 2012

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

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE THUNDERSTORM HAS 
WEAKENED AND MOVED OUT OF THE WARNED AREA. THUS THE THUNDERSTORM 
WARNING HAS BEEN CANCELLED.

LAT...LON 2696 8015 2695 8015 2684 8021 2693 8047
      2696 8045 2696 8024 2696 8023 2696 8015
      2697 8013
TIME...MOT...LOC 2003Z 206DEG 20KT 2696 8030

$$

AK

The office that day

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

IssuedProductOfficeCountiesLasted
May 19, 12:37 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade2 hr
May 19, 2:02 PM EDTSpecial Weather StatementMFLPalm Beach43 min
May 19, 2:04 PM EDTSpecial Weather StatementMFLBroward26 min
May 19, 2:10 PM EDTSevere Thunderstorm WarningMFLPalm Beach22 min
May 19, 2:11 PM EDTSpecial Weather StatementMFLPalm Beach34 min
May 19, 2:43 PM EDTSpecial Weather StatementMFLPalm Beach47 min
May 19, 2:45 PM EDTSpecial Weather StatementMFLBroward30 min
May 19, 3:04 PM EDTSpecial Weather StatementMFLBroward56 min
May 19, 3:12 PM EDTSpecial Weather StatementMFLPalm Beach48 min
May 19, 3:16 PM EDTSevere Thunderstorm WarningMFLPalm Beach44 min
May 19, 3:35 PM EDTSpecial Marine WarningMFL43 min
May 19, 3:54 PM EDTSpecial Weather StatementMFLMonroe36 min
May 19, 4:29 PM EDTSpecial Weather StatementMFLMonroe61 min
May 19, 4:31 PM EDTSpecial Weather StatementMFLMiami-Dade44 min
May 19, 4:32 PM EDTSpecial Weather StatementMFLBroward43 min
May 19, 4:34 PM EDTSpecial Marine WarningMFL86 min
May 19, 4:34 PM EDTSpecial Weather StatementMFLHendry41 min
May 19, 4:39 PM EDTSevere Thunderstorm WarningMFLGlades, Hendry39 min
May 19, 4:40 PM EDTSpecial Weather StatementMFLHendry50 min
May 19, 4:52 PM EDTSevere Thunderstorm WarningMFLCollier, Hendry18 min
May 19, 5:23 PM EDTSpecial Weather StatementMFLHendry52 min
May 19, 5:32 PM EDTSevere Thunderstorm WarningMFLCollier, Hendry43 min
May 19, 5:39 PM EDTSpecial Weather StatementMFLGlades51 min
May 19, 6:03 PM EDTSevere Thunderstorm WarningMFLBroward, Collier, Hendry42 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.