Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 51, NWS Melbourne, FL

June 10, 2012Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 10, 2012, 8:12 PM EDT for Volusia County, Florida. It was in force for 26 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 10, 2012, 8:12 PM EDT (00:12 UTC)
Expired
Jun 10, 2012, 8:38 PM EDT
In force
26 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 112 km from the middle of the area, began a volume at 00:12 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

Jacksonville, FL (KJAX), launched 00:00Z, 0.2 hours before the alert went out and 172 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, Jacksonville, FL at 00:00Z on 2012-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1797 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, Jacksonville, FL at 00:00Z on 2012-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 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
1797 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
793 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
134 m²/s²
Significant tornado parameter
0.7
Supercell composite
6.1

Open this sounding in Storm Lab

The text

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

891 
WUUS52 KMLB 110012
SVRMLB
FLC127-110100-
/O.NEW.KMLB.SV.W.0051.120611T0012Z-120611T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
812 PM EDT SUN JUN 10 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL VOLUSIA COUNTY IN FLORIDA

* UNTIL 900 PM EDT.

* AT 807 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 8 MILES
  NORTHEAST OF DELAND...AND MOVING SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  LAKE HELEN AND PORT ORANGE

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 2904 8092 2888 8109 2903 8135 2924 8115
TIME...MOT...LOC 0011Z 311DEG 9KT 2909 8117

$$


WEITLICH
2 follow-up statements
145 
WWUS52 KMLB 110027
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
827 PM EDT SUN JUN 10 2012

FLC127-110100-
/O.CON.KMLB.SV.W.0051.000000T0000Z-120611T0100Z/
VOLUSIA-
827 PM EDT SUN JUN 10 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM EDT
FOR CENTRAL VOLUSIA COUNTY...

AT 821 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 NEAR LAKE HELEN...MOVING SOUTHEAST AT 10 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SPRUCE 
CREEK AND LAKE ASHBY

LAT...LON 2921 8112 2904 8092 2888 8109 2900 8130
TIME...MOT...LOC 0025Z 311DEG 9KT 2903 8117

$$


WEITLICH
257 
WWUS52 KMLB 110038
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
838 PM EDT SUN JUN 10 2012

FLC127-110048-
/O.CAN.KMLB.SV.W.0051.000000T0000Z-120611T0100Z/
VOLUSIA-
838 PM EDT SUN JUN 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL VOLUSIA COUNTY 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...STRONG WIND GUSTS 
UP TO 40 TO 50 MPH...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL 
CONTINUE TO BE POSSIBLE.

LAT...LON 2921 8112 2904 8092 2888 8109 2900 8130
TIME...MOT...LOC 0038Z 311DEG 9KT 2901 8114

$$


WEITLICH

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 8:09 PM EDTSpecial Weather StatementMLBOsceola36 min
Jun 10, 8:38 PM EDTSpecial Weather StatementMLBOrange, Seminole, Volusia52 min
Jun 10, 8:50 PM EDTSevere Thunderstorm WarningMLBLake, Orange, Osceola55 min
Jun 10, 9:13 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola47 min
Jun 10, 9:14 PM EDTAreal Flood AdvisoryMLBLake, Orange, Osceola76 min
Jun 10, 9:50 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange, Osceola30 min
Jun 10, 9:56 PM EDTSpecial Marine WarningMLB94 min
Jun 10, 10:19 PM EDTSpecial Weather StatementMLBBrevard41 min
Jun 10, 11:27 PM EDTSpecial Weather StatementMLBOkeechobee48 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.