Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 4, NWS Melbourne, FL

March 4, 2012Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 4, 2012, 5:59 AM EST for Volusia County, Florida. It was in force for 31 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: Mar 4, 2012, 5:59 AM EST (10:59 UTC)
Expired: Mar 4, 2012, 6:30 AM EST
In force: 31 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 113 km from the middle of the area, began a volume at 10:59 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, 11.0 hours before the alert went out and 171 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: 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.

187 
WUUS52 KMLB 041059
SVRMLB
FLC127-041130-
/O.NEW.KMLB.SV.W.0004.120304T1059Z-120304T1130Z/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 630 AM EST.

* AT 555 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES SOUTHWEST OF PORT       
  ORANGE...OR 6 MILES NORTHEAST OF LAKE HELEN...AND MOVING NORTHEAST 
  AT 55 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED       
  TO...DAYTONA BEACH INTL SPEEDWAY...HOLLY HILL...DAYTONA            
  BEACH...SOUTH DAYTONA...WILBUR BY THE SEA...  NEW SMYRNA BEACH AND 
  PONCE INLET

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 2912 8094 2910 8092 2908 8093 2908 8091
      2907 8090 2898 8085 2894 8121 2915 8120
      2926 8102
TIME...MOT...LOC 1058Z 267DEG 40KT 2904 8111

$$

SPRATT

1 follow-up statement

085 
WWUS52 KMLB 041126
SVSMLB

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

FLC127-041134-
/O.EXP.KMLB.SV.W.0004.000000T0000Z-120304T1130Z/
VOLUSIA-
626 AM EST SUN MAR 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL VOLUSIA COUNTY WILL
EXPIRE AT 630 AM EST...

THE SEVERE STORM THAT PROMPTED THE WARNING HAS EXITED INTO THE 
ATLANTIC...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 2912 8094 2910 8092 2908 8093 2908 8091
      2907 8090 2898 8085 2894 8121 2915 8120
      2926 8102
TIME...MOT...LOC 1124Z 267DEG 40KT 2905 8078

$$

SPRATT

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 4, 2:40 AM EST	Wind Advisory	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	14 hr
Mar 4, 2:59 AM EST	Fire Weather Watch	MLB	Lake, Okeechobee, Orange, Osceola, Seminole, Volusia	24 hr
Mar 4, 2:59 AM EST	Red Flag Warning	MLB	Lake, Orange, Osceola, Seminole, Volusia	16 hr
Mar 4, 4:20 AM EST	Special Weather Statement	MLB	Lake	85 min
Mar 4, 5:26 AM EST	Special Marine Warning	MLB		2 hr
Mar 4, 5:36 AM EST	Special Weather Statement	MLB	Lake, Seminole, Volusia	54 min
Mar 4, 5:37 AM EST	Special Marine Warning	MLB		83 min
Mar 4, 5:39 AM EST	Severe Thunderstorm Warning	MLB	Volusia	18 min
Mar 4, 6:19 AM EST	Special Weather Statement	MLB	Brevard, Indian River, Orange, Osceola, Seminole	86 min
Mar 4, 7:00 AM EST	Special Marine Warning	MLB		2 hr
Mar 4, 7:44 AM EST	Special Weather Statement	MLB	Indian River, Okeechobee	46 min
Mar 4, 7:57 AM EST	Severe Thunderstorm Warning	MLB	Brevard, Indian River	46 min
Mar 4, 8:27 AM EST	Special Weather Statement	MLB	Martin, Saint Lucie	93 min
Mar 4, 8:58 AM EST	Special Marine Warning	MLB		107 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.