Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 91, NWS Melbourne, FL

June 25, 2011Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 25, 2011, 3:54 PM EDT for Martin County, Florida. It was in force for 35 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: Jun 25, 2011, 3:54 PM EDT (19:54 UTC)
Expired: Jun 25, 2011, 4:29 PM EDT
In force: 35 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Martin County, FL

The radar

The Melbourne radar (KMLB), 131 km from the middle of the area, began a volume at 19:57 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, 7.9 hours before the alert went out and 133 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2276 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 672 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 57 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.

222 
WUUS52 KMLB 251954
SVRMLB
FLC085-252100-
/O.NEW.KMLB.SV.W.0091.110625T1954Z-110625T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
354 PM EDT SAT JUN 25 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 500 PM EDT.

* AT 353 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 JOHNATHAN DICKINSON STATE
  PARK...OR NEAR HOBE SOUND...AND MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  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 2697 8032 2710 8028 2711 8013 2708 8011
      2697 8008 2697 8009 2697 8014 2696 8014
TIME...MOT...LOC 1954Z 283DEG 12KT 2702 8021

$$


WEITLICH

2 follow-up statements

020 
WWUS52 KMLB 252003
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
403 PM EDT SAT JUN 25 2011

FLC085-252100-
/O.CON.KMLB.SV.W.0091.000000T0000Z-110625T2100Z/
MARTIN-
403 PM EDT SAT JUN 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHEASTERN MARTIN COUNTY...

AT 401 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES WEST OF JONATHAN
DICKINSON STATE PARK...OR 7 MILES SOUTHWEST OF HOBE SOUND...MOVING
SOUTHEAST AT 5 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO JUPITER
ISLAND AND JOHNATHAN DICKINSON STATE PARK

LAT...LON 2697 8032 2710 8028 2711 8013 2708 8011
      2697 8008 2697 8009 2697 8014 2696 8014
TIME...MOT...LOC 2003Z 329DEG 3KT 2701 8024

$$


WEITLICH

856 
WWUS52 KMLB 252029
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
429 PM EDT SAT JUN 25 2011

FLC085-252037-
/O.CAN.KMLB.SV.W.0091.000000T0000Z-110625T2100Z/
MARTIN-
429 PM EDT SAT JUN 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MARTIN COUNTY IS
CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO 
LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. HOWEVER 
STRONG WIND GUSTS UP TO 40 MPH MAY STILL BE POSSIBLE BEFORE THE 
STORMS ENDS. AS A RESULT...THE WARNING HAS BEEN CANCELLED. 
HOWEVER...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE 
TO BE POSSIBLE.

LAT...LON 2697 8032 2710 8028 2711 8013 2708 8011
      2697 8008 2697 8009 2697 8014 2696 8014
TIME...MOT...LOC 2027Z 329DEG 3KT 2699 8023

$$


WEITLICH

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 2:09 PM EDT	Special Weather Statement	MLB	Brevard, Osceola	51 min
Jun 25, 2:13 PM EDT	Special Marine Warning	MLB		92 min
Jun 25, 2:48 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	16 min
Jun 25, 3:03 PM EDT	Areal Flood Advisory	MLB	Lake, Orange, Seminole	117 min
Jun 25, 3:25 PM EDT	Areal Flood Advisory	MLB	Brevard, Lake, Orange, Seminole, Volusia	95 min
Jun 25, 3:38 PM EDT	Areal Flood Advisory	MLB	Martin	82 min
Jun 25, 3:47 PM EDT	Special Weather Statement	MLB	Seminole	58 min
Jun 25, 4:01 PM EDT	Special Marine Warning	MLB		59 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.