Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 25, NWS Miami, FL

May 15, 2012Broward County, Palm Beach County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 15, 2012, 5:15 PM EDT for Broward County, Palm Beach County, Florida. It was in force for 43 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 15, 2012, 5:15 PM EDT (21:15 UTC)
Expired
May 15, 2012, 5:58 PM EDT
In force
43 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

Counties Broward County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 93 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 75 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 2012-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1962 joules per kilogram.LCLLFCEL10008507005003002001001 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 2012-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 2 square meters per square second.19395878Sfc1 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
1962 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
616 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
2 m²/s²
0-3 km storm-relative helicity
29 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.

053 
WUUS52 KMFL 152115
SVRMFL
FLC011-099-152200-
/O.NEW.KMFL.SV.W.0025.120515T2115Z-120515T2200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
515 PM EDT TUE MAY 15 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

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

* UNTIL 600 PM EDT

* AT 512 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 OVER
  EXTREME SOUTH CENTRAL PALM BEACH COUNTY...AND MOVING NORTH AT 10
  MPH.

* THE STORM WILL AFFECT...
  RURAL SOUTHERN PALM BEACH 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 2651 8069 2644 8047 2630 8062 2633 8071
TIME...MOT...LOC 2115Z 196DEG 7KT 2634 8062

$$

MJB
2 follow-up statements
850 
WWUS52 KMFL 152138
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
538 PM EDT TUE MAY 15 2012

FLC011-152148-
/O.CAN.KMFL.SV.W.0025.000000T0000Z-120515T2200Z/
BROWARD FL-
538 PM EDT TUE MAY 15 2012

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME NORTH CENTRAL BROWARD
COUNTY IS CANCELLED...

LAT...LON 2651 8069 2644 8047 2634 8059 2635 8071
TIME...MOT...LOC 2138Z 196DEG 7KT 2638 8061

$$

FLC099-152200-
/O.CON.KMFL.SV.W.0025.000000T0000Z-120515T2200Z/
PALM BEACH FL-
538 PM EDT TUE MAY 15 2012

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

AT 535 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS 
LOCATED OVER SOUTH CENTRAL PALM BEACH COUNTY...MOVING NORTH AT 10 
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.

LAT...LON 2651 8069 2644 8047 2634 8059 2635 8071
TIME...MOT...LOC 2138Z 196DEG 7KT 2638 8061

$$

MJB
987 
WWUS52 KMFL 152158
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
558 PM EDT TUE MAY 15 2012

FLC099-152205-
/O.CAN.KMFL.SV.W.0025.000000T0000Z-120515T2200Z/
PALM BEACH FL-
558 PM EDT TUE MAY 15 2012

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

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

HOWEVER, STRONG WINDS TO 45 MPH AND DIME SIZE HAIL ARE STILL POSSIBLE
WITH THIS STORM.

LAT...LON 2651 8069 2644 8047 2634 8059 2635 8071
TIME...MOT...LOC 2155Z 196DEG 7KT 2641 8060

$$

MJB

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 2:56 PM EDTSpecial Weather StatementMFLMartin34 min
May 15, 3:05 PM EDTSevere Thunderstorm WarningMFLPalm Beach40 min
May 15, 3:06 PM EDTSpecial Weather StatementMFLGlades24 min
May 15, 3:09 PM EDTSevere Thunderstorm WarningMFLGlades36 min
May 15, 3:30 PM EDTSpecial Weather StatementMFLHendry30 min
May 15, 3:38 PM EDTSpecial Weather StatementMFLHendry52 min
May 15, 3:44 PM EDTSpecial Weather StatementMFLMartin46 min
May 15, 3:53 PM EDTSpecial Weather StatementMFLMonroe37 min
May 15, 4:19 PM EDTSpecial Weather StatementMFLHendry26 min
May 15, 4:24 PM EDTSpecial Weather StatementMFLPalm Beach36 min
May 15, 4:37 PM EDTSpecial Weather StatementMFLHendry23 min
May 15, 4:45 PM EDTSpecial Weather StatementMFLHendry30 min
May 15, 4:54 PM EDTSpecial Weather StatementMFLPalm Beach51 min
May 15, 4:58 PM EDTSpecial Weather StatementMFLBroward47 min
May 15, 5:03 PM EDTSpecial Weather StatementMFLBroward42 min
May 15, 5:06 PM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach24 min
May 15, 5:33 PM EDTSevere Thunderstorm WarningMFLPalm Beach42 min
May 15, 5:53 PM EDTSevere Thunderstorm WarningMFLPalm Beach24 min
May 15, 6:00 PM EDTSpecial Marine WarningMFL45 min
May 15, 6:05 PM EDTAreal Flood AdvisoryMFLPalm Beach115 min
May 15, 6:38 PM EDTSpecial Marine WarningMFL52 min
May 15, 7:30 PM EDTSpecial Marine WarningMFL60 min
May 15, 7:30 PM EDTSpecial Marine WarningMFL60 min
May 15, 7:53 PM EDTSpecial Weather StatementMFLBroward52 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.