Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 85, NWS Melbourne, FL

June 18, 2011Brevard County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 18, 2011, 8:39 PM EDT for Brevard County, Osceola County, Florida. It was in force for 36 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 18, 2011, 8:39 PM EDT (00:39 UTC)
Expired
Jun 18, 2011, 9:15 PM EDT
In force
36 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Brevard County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 15 km from the middle of the area, began a volume at 00:39 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.

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 00:00Z, 0.7 hours before the alert went out and 53 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, Cape Canaveral, FL at 00:00Z on 2011-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1052 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, Cape Canaveral, FL at 00:00Z on 2011-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939Sfc1 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
1052 J/kg
Mixed-layer CIN
-51 J/kg
Mixed-layer LCL
1196 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

286 
WUUS52 KMLB 190039
SVRMLB
FLC009-097-190115-
/O.NEW.KMLB.SV.W.0085.110619T0039Z-110619T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
839 PM EDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BREVARD COUNTY IN FLORIDA
  EXTREME EAST CENTRAL OSCEOLA COUNTY IN FLORIDA

* UNTIL 915 PM EDT.

* AT 835 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A 
LINE OF SEVERE THUNDERSTORMS AND AN OUTFLOW BOUNDARY...CAPABLE OF 
PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE 
LOCATED NEAR CAMP HOLLY FISH CAMP...AND MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  WEST MELBOURNE...PALM BAY...SUNTREE...SATELLITE BEACH...MICCO...   
  MELBOURNE BEACH...MELBOURNE...MALABAR...INDIAN HARBOUR BEACH AND   
  INDIALANTIC

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 2786 8045 2787 8048 2792 8049 2794 8052
      2787 8049 2786 8049 2784 8050 2790 8088
      2826 8088 2822 8066 2820 8065 2821 8065
      2820 8059 2807 8055 2787 8044
TIME...MOT...LOC 0037Z 264DEG 9KT 2816 8075

$$

GUSEMAN
1 follow-up statement
284 
WWUS52 KMLB 190055
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
855 PM EDT SAT JUN 18 2011

FLC097-190103-
/O.CAN.KMLB.SV.W.0085.000000T0000Z-110619T0115Z/
OSCEOLA-
855 PM EDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL OSCEOLA
COUNTY IS CANCELLED...

LAT...LON 2786 8045 2787 8048 2792 8049 2794 8052
      2787 8049 2786 8049 2784 8050 2790 8084
      2825 8084 2822 8066 2820 8065 2821 8065
      2820 8059 2807 8055 2787 8044
TIME...MOT...LOC 0053Z 264DEG 9KT 2816 8070

$$

FLC009-190115-
/O.CON.KMLB.SV.W.0085.000000T0000Z-110619T0115Z/
BREVARD-
855 PM EDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTHERN BREVARD COUNTY...

AT 849 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 NEAR PALM SHORES...OR 6
MILES NORTH OF CAMP HOLLY FISH CAMP...MOVING EAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WEST 
MELBOURNE...PALM BAY...EAU GALLIE...SATELLITE 
BEACH...MICCO...MELBOURNE BEACH...MALABAR...INDIALANTIC...GRANT AND 
BAREFOOT BAY

LAT...LON 2786 8045 2787 8048 2792 8049 2794 8052
      2787 8049 2786 8049 2784 8050 2790 8084
      2825 8084 2822 8066 2820 8065 2821 8065
      2820 8059 2807 8055 2787 8044
TIME...MOT...LOC 0053Z 264DEG 9KT 2816 8070

$$

GUSEMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 18, 8:15 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange45 min
Jun 18, 8:59 PM EDTSevere Thunderstorm WarningMLBBrevard31 min
Jun 18, 9:18 PM EDTSpecial Weather StatementMLBBrevard27 min
Jun 18, 9:26 PM EDTAreal Flood AdvisoryMLBBrevard2 hr
Jun 19, 4:26 PM EDTSpecial Weather StatementMLBSaint Lucie49 min
Jun 19, 5:40 PM EDTSpecial Weather StatementMLBOsceola65 min
Jun 19, 6:22 PM EDTSpecial Weather StatementMLBOsceola53 min
Jun 19, 6:29 PM EDTSpecial Weather StatementMLBLake61 min
Jun 19, 6:34 PM EDTAreal Flood AdvisoryMLBLake116 min
Jun 19, 7:10 PM EDTSpecial Weather StatementMLBOrange65 min
Jun 19, 7:26 PM EDTAreal Flood AdvisoryMLBOrange, Osceola2 hr
Jun 19, 7:30 PM EDTSevere Thunderstorm WarningMLBOrange60 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every 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.