Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 46, NWS Melbourne, FL

June 9, 2012Indian River County, Okeechobee County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 9, 2012, 5:40 PM EDT for Indian River County, Okeechobee County, Osceola County, Florida. It was in force for 44 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 9, 2012, 5:40 PM EDT (21:40 UTC)
Expired: Jun 9, 2012, 6:24 PM EDT
In force: 44 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Indian River County, FL, Okeechobee County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 56 km from the middle of the area, began a volume at 21:42 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.7 hours before the alert went out and 97 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: 3 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 1102 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

143 
WUUS52 KMLB 092140
SVRMLB
FLC061-093-097-092245-
/O.NEW.KMLB.SV.W.0046.120609T2140Z-120609T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
540 PM EDT SAT JUN 9 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  INDIAN RIVER COUNTY IN FLORIDA
  NORTHEASTERN OKEECHOBEE COUNTY IN FLORIDA
  SOUTHEASTERN OSCEOLA COUNTY IN FLORIDA

* UNTIL 645 PM EDT.

* AT 538 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 7 MILES
  SOUTHEAST OF YEEHAW JUNCTION...OR 6 MILES NORTH OF FORT DRUM...AND 
  MOVING NORTHEAST AT 25 MPH ACROSS THE FLORIDA TURNPIKE.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... 
  BLUE CYPRESS LAKE AND YEEHAW JUNCTION.

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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 2757 8050 2756 8058 2756 8068 2754 8068
      2754 8070 2758 8098 2782 8086 2777 8046
TIME...MOT...LOC 2139Z 234DEG 20KT 2761 8082

$$


KELLY

2 follow-up statements

086 
WWUS52 KMLB 092153
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
553 PM EDT SAT JUN 9 2012

FLC061-093-097-092245-
/O.CON.KMLB.SV.W.0046.000000T0000Z-120609T2245Z/
OSCEOLA-INDIAN RIVER-OKEECHOBEE-
553 PM EDT SAT JUN 9 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHEASTERN OKEECHOBEE...INDIAN RIVER AND SOUTHEASTERN OSCEOLA
COUNTIES...

AT 547 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED ALONG STATE ROUTE 60 IN WESTERN INDIAN RIVER COUNTY...MOVING 
NORTHEAST AT 25 MPH TOWARD BLUE CYPRESS LAKE.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BLUE 
CYPRESS LAKE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A 
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. 
BOATERS SHOULD GET OFF THE LAKE IMMEDIATELY AND SEEK STURDY SHELTER.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 2757 8050 2756 8058 2756 8068 2754 8068
      2754 8070 2758 8098 2782 8086 2777 8046
TIME...MOT...LOC 2152Z 231DEG 20KT 2767 8080

$$


KELLY

217 
WWUS52 KMLB 092224
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
624 PM EDT SAT JUN 9 2012

FLC061-093-097-092233-
/O.CAN.KMLB.SV.W.0046.000000T0000Z-120609T2245Z/
OSCEOLA-INDIAN RIVER-OKEECHOBEE-
624 PM EDT SAT JUN 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OKEECHOBEE...
INDIAN RIVER AND SOUTHEASTERN OSCEOLA COUNTIES IS CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO
LONGER CAPABLE OF PRODUCING LARGE HAIL OR DAMAGING WINDS. AS A
RESULT...THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND
DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE.

LAT...LON 2757 8050 2756 8058 2756 8068 2754 8068
      2754 8070 2758 8098 2782 8086 2777 8046
TIME...MOT...LOC 2223Z 231DEG 20KT 2778 8065

$$


KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 3:57 AM EDT	Special Weather Statement	MLB	Martin	63 min
Jun 9, 4:39 PM EDT	Special Weather Statement	MLB	Okeechobee	51 min
Jun 9, 4:47 PM EDT	Special Weather Statement	MLB	Indian River	43 min
Jun 9, 4:55 PM EDT	Special Weather Statement	MLB	Orange	50 min
Jun 9, 5:34 PM EDT	Special Weather Statement	MLB	Indian River	41 min
Jun 9, 6:22 PM EDT	Special Weather Statement	MLB	Osceola	53 min
Jun 9, 7:08 PM EDT	Special Weather Statement	MLB	Brevard	37 min
Jun 9, 7:10 PM EDT	Special Marine Warning	MLB		65 min
Jun 9, 7:19 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	26 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every 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.