Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 3, NWS Melbourne, FL

March 4, 2012Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 4, 2012, 5:39 AM EST for Volusia County, Florida. It was in force for 18 min. 2 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
Mar 4, 2012, 5:39 AM EST (10:39 UTC)
Expired
Mar 4, 2012, 5:57 AM EST
In force
18 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 140 km from the middle of the area, began a volume at 10:42 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.

What was reported inside it

TimeReportWhereRemark
Mar 4, 5:46 AM ESTTSTM WND GST 51Ormond Beach, FLWEATHERUNDERGROUND OBSERVATION FROM ORMOND BEACH WATER PLANT NORTH
Mar 4, 5:51 AM ESTTSTM WND GST 514 Nnw Holly Hill, FLWEATHERUNDERGROUND WU55 012/13 GUST 44 KTS.

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

The nearest sounding before it

Jacksonville, FL (KJAX), launched 00:00Z, 10.7 hours before the alert went out and 144 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 2012-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 184 joules per kilogram.LCLLFCEL10008507005003002001001 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, Jacksonville, FL at 00:00Z on 2012-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 248 square meters per square second.1939587897117Sfc1 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
184 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
1348 m above ground
0-6 km bulk shear
78 kt
0-1 km storm-relative helicity
248 m²/s²
0-3 km storm-relative helicity
281 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.0

Open this sounding in Storm Lab

The text

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

283 
WUUS52 KMLB 041039
SVRMLB
FLC127-041115-
/O.NEW.KMLB.SV.W.0003.120304T1039Z-120304T1115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
539 AM EST SUN MAR 4 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 615 AM EST.

* AT 537 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 8 MILES WEST OF ORMOND BY THE   
  SEA...OR 8 MILES WEST OF ORMOND BEACH...AND MOVING NORTHEAST AT 60 
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  TOMOKA ESTATES AND TOMOKA STATE PARK.

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 2926 8102 2925 8102 2920 8122 2927 8125
      2927 8116 2940 8116 2941 8116 2943 8110
TIME...MOT...LOC 1039Z 255DEG 55KT 2931 8116

$$

SPRATT
1 follow-up statement
859 
WWUS52 KMLB 041057
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
557 AM EST SUN MAR 4 2012

FLC127-041107-
/O.CAN.KMLB.SV.W.0003.000000T0000Z-120304T1115Z/
VOLUSIA-
557 AM EST SUN MAR 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH 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...HEAVY RAIN AND
DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE.

LAT...LON 2926 8102 2925 8102 2920 8122 2927 8125
      2927 8116 2940 8116 2941 8116 2943 8110
TIME...MOT...LOC 1057Z 255DEG 55KT 2938 8085

$$

67

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 4, 2:40 AM ESTWind AdvisoryMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia14 hr
Mar 4, 2:59 AM ESTFire Weather WatchMLBLake, Okeechobee, Orange, Osceola, Seminole, Volusia24 hr
Mar 4, 2:59 AM ESTRed Flag WarningMLBLake, Orange, Osceola, Seminole, Volusia16 hr
Mar 4, 4:20 AM ESTSpecial Weather StatementMLBLake85 min
Mar 4, 5:26 AM ESTSpecial Marine WarningMLB2 hr
Mar 4, 5:36 AM ESTSpecial Weather StatementMLBLake, Seminole, Volusia54 min
Mar 4, 5:37 AM ESTSpecial Marine WarningMLB83 min
Mar 4, 5:59 AM ESTSevere Thunderstorm WarningMLBVolusia31 min
Mar 4, 6:19 AM ESTSpecial Weather StatementMLBBrevard, Indian River, Orange, Osceola, Seminole86 min
Mar 4, 7:00 AM ESTSpecial Marine WarningMLB2 hr
Mar 4, 7:44 AM ESTSpecial Weather StatementMLBIndian River, Okeechobee46 min
Mar 4, 7:57 AM ESTSevere Thunderstorm WarningMLBBrevard, Indian River46 min
Mar 4, 8:27 AM ESTSpecial Weather StatementMLBMartin, Saint Lucie93 min
Mar 4, 8:58 AM ESTSpecial Marine WarningMLB107 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.