Alert archive / Florida / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 13, NWS Melbourne, FL

April 15, 2013Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Apr 15, 2013, 4:37 PM EDT for Martin County, Florida. It was in force for 38 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Apr 15, 2013, 4:37 PM EDT (20:37 UTC)
Expired
Apr 15, 2013, 5:15 PM EDT
In force
38 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

County Martin County, FL

The radar

The Melbourne radar (KMLB), 123 km from the middle of the area, began a volume at 20:39 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.

What was reported inside it

TimeReportWhereRemark
Apr 15, 4:45 PM EDTTSTM WND GST 601 Nnw Hobe Sound, FLA STORM SPOTTER IN HOBE SOUND ESTIMATED WIND GUSTS OF 60 MPH AT 445PM LOCAL. PEA-SIZED HAIL WAS ALSO OBSERVED DURING THIS OBSERVATION.
Apr 15, 4:50 PM EDTTSTM WND GST 443 Sw Hobe Sound, FLA SOUTH FLORIDA WATER MANAGEMENT DISTRICT WEATHER STATION REPORTED A WIND GUST OF 38 KNOTS / 44 MPH AT 450PM LOCAL.
Apr 15, 4:55 PM EDTTSTM WND DMG7 Nw Jupiter, FLA MEMBER OF THE MEDIA REPORTED DAMAGE TO A TENNIS COURT IN THE TAILWIND AIRPARK SUBDIVISION LOCATED WEST OF INTERSTATE 95 AT 455PM LOCAL. WIND GUSTS WERE ESTIMATED TO BE 60 MPH AT THE TIME.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 8.6 hours before the alert went out and 142 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 2013-04-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1861 joules per kilogram.LCLEL10008507005003002001001 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 2013-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
1861 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
595 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.3

Open this sounding in Storm Lab

The text

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

057 
WUUS52 KMLB 152037
SVRMLB
FLC085-152115-
/O.NEW.KMLB.SV.W.0013.130415T2037Z-130415T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
437 PM EDT MON APR 15 2013

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN MARTIN COUNTY IN FLORIDA

* UNTIL 515 PM EDT.

* AT 435 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR PORT SALERNO...AND MOVING
  SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  HOBE SOUND...HOBE SOUND BEACH...JONATHAN DICKINSON STATE PARK AND
  JUPITER ISLAND

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR AND OR LARGE DESTRUCTIVE HAIL. FREQUENT TO EXCESSIVE LIGHTNING
AND VERY HEAVY RAIN WILL ALSO BE POSSIBLE. IF THE STORM APPROACHES
YOU...SEEK SHELTER IN AN ENCLOSED BUILDING ON THE LOWEST FLOOR. KEEP
AWAY FROM WINDOWS.

&&

LAT...LON 2716 8027 2720 8019 2719 8017 2720 8018
      2721 8017 2711 8013 2703 8009 2697 8007
      2697 8014 2695 8015 2696 8027
TIME...MOT...LOC 2037Z 326DEG 15KT 2711 8018

$$



BRAGAW
2 follow-up statements
061 
WWUS52 KMLB 152055
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
455 PM EDT MON APR 15 2013

FLC085-152115-
/O.CON.KMLB.SV.W.0013.000000T0000Z-130415T2115Z/
MARTIN-
455 PM EDT MON APR 15 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR EASTERN MARTIN COUNTY...

AT 451 PM EDT...A TRAINED WEATHER SPOTTER IN HOBE SOUND REPORTED  
PEA SIZED HAIL AND ESTIMATED A WIND GUST AROUND 60 MPH. IN 
ADDITION...RADAR ESTIMATED WINDS OVER 60 MPH WITH THE STORM OVER 
I-95 SOUTH OF MILE MARKER 125. THIS STORM WAS MOVING SOUTHEAST AT 15 
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HOBE
SOUND BEACH...JONATHAN DICKINSON STATE PARK AND JUPITER ISLAND

LAT...LON 2716 8027 2720 8019 2719 8017 2720 8018
      2721 8017 2711 8013 2703 8009 2697 8007
      2697 8014 2695 8015 2696 8027
TIME...MOT...LOC 2052Z 326DEG 15KT 2706 8014

$$



BRAGAW
255 
WWUS52 KMLB 152115
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
515 PM EDT MON APR 15 2013

FLC085-152125-
/O.EXP.KMLB.SV.W.0013.000000T0000Z-130415T2115Z/
MARTIN-
515 PM EDT MON APR 15 2013

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN MARTIN COUNTY HAS
EXPIRED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND EXITED
THE WARNING AREA...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 2716 8027 2720 8019 2719 8017 2720 8018
      2721 8017 2711 8013 2703 8009 2697 8007
      2697 8014 2695 8015 2696 8027
TIME...MOT...LOC 2055Z 326DEG 15KT 2705 8013

$$



BRAGAW

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 14, 8:05 PM EDTTornado WarningMLBBrevard, Orange, Osceola40 min
Apr 14, 8:31 PM EDTTornado WarningMLBBrevard59 min
Apr 14, 8:43 PM EDTSpecial Marine WarningMLB2 hr
Apr 14, 8:53 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange, Osceola82 min
Apr 14, 9:02 PM EDTTornado WarningMLBBrevard58 min
Apr 14, 9:21 PM EDTSevere Thunderstorm WarningMLBBrevard, Osceola54 min
Apr 14, 9:45 PM EDTSevere Thunderstorm WarningMLBIndian River, Osceola60 min
Apr 14, 9:55 PM EDTAreal Flood AdvisoryMLBBrevard2 hr
Apr 14, 10:22 PM EDTSpecial Weather StatementMLBBrevard38 min
Apr 14, 10:33 PM EDTSevere Thunderstorm WarningMLBBrevard42 min
Apr 14, 10:53 PM EDTAreal Flood WarningMLBBrevard2 hr
Apr 14, 11:08 PM EDTSpecial Weather StatementMLBBrevard37 min
Apr 14, 11:14 PM EDTSpecial Marine WarningMLB91 min
Apr 14, 11:34 PM EDTSpecial Weather StatementMLBIndian River41 min
Apr 15, 3:15 PM EDTSpecial Weather StatementMLBSaint Lucie45 min
Apr 15, 3:16 PM EDTSpecial Marine WarningMLB59 min
Apr 15, 3:23 PM EDTAreal Flood AdvisoryMLBSaint Lucie82 min
Apr 15, 3:43 PM EDTSpecial Weather StatementMLBMartin47 min
Apr 15, 3:46 PM EDTSpecial Marine WarningMLB119 min
Apr 15, 4:34 PM EDTSpecial Marine WarningMLB86 min

Nearby

Severe Thunderstorm Warnings in Florida, 2013Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.