Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 79, NWS Melbourne, FL

August 14, 2012Volusia County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 14, 2012, 4:00 PM EDT for Volusia County, Florida. It was in force for 34 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
Aug 14, 2012, 4:00 PM EDT (20:00 UTC)
Expired
Aug 14, 2012, 4:34 PM EDT
In force
34 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

County Volusia County, FL

The radar

The Melbourne radar (KMLB), 92 km from the middle of the area, began a volume at 20:00 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, 8.0 hours before the alert went out and 65 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 12:00Z on 2012-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 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, Cape Canaveral, FL at 12:00Z on 2012-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
23 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1369 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
6 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

455 
WUUS52 KMLB 142000
SVRMLB
FLC127-142045-
/O.NEW.KMLB.SV.W.0079.120814T2000Z-120814T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
400 PM EDT TUE AUG 14 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 445 PM EDT.

* AT 355 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 9 MILES
  WEST OF EDGEWATER...AND MOVING SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  MAYTOWN AND BETHUNE BEACH

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 2894 8082 2879 8093 2879 8096 2881 8106
      2887 8111 2902 8101 2902 8089
TIME...MOT...LOC 2000Z 302DEG 12KT 2893 8103

$$



BRAGAW
2 follow-up statements
699 
WWUS52 KMLB 142013
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
413 PM EDT TUE AUG 14 2012

FLC127-142045-
/O.CON.KMLB.SV.W.0079.000000T0000Z-120814T2045Z/
VOLUSIA-
413 PM EDT TUE AUG 14 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHEASTERN VOLUSIA COUNTY...

AT 409 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 6 MILES NORTHEAST OF FARMTON...OR 7 MILES SOUTHWEST OF 
EDGEWATER...MOVING SOUTHEAST AT 10 TO 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
MAYTOWN...BETHUNE BEACH AND TURTLE MOUND.

LAT...LON 2894 8082 2879 8093 2879 8096 2881 8106
      2887 8111 2902 8101 2902 8089
TIME...MOT...LOC 2013Z 302DEG 12KT 2891 8099

$$
315 
WWUS52 KMLB 142034
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
434 PM EDT TUE AUG 14 2012

FLC127-142043-
/O.CAN.KMLB.SV.W.0079.000000T0000Z-120814T2045Z/
VOLUSIA-
434 PM EDT TUE AUG 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN VOLUSIA COUNTY IS
CANCELLED...

THIS WARNING HAS BEEN REPLACED BY A SEVERE THUNDERSTORM WARNING FOR 
NORTHEASTERN SEMINOLE...SOUTHERN VOLUSIA AND NORTHWESTERN BREVARD 
COUNTIES.

LAT...LON 2894 8082 2879 8093 2879 8096 2881 8106
      2887 8111 2902 8101 2902 8089
TIME...MOT...LOC 2033Z 302DEG 12KT 2887 8093

$$



CRISTALDI

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 9:32 PM EDTSpecial Weather StatementMLBFlagler58 min
Aug 14, 3:48 PM EDTSpecial Weather StatementMLBVolusia42 min
Aug 14, 4:01 PM EDTSpecial Weather StatementMLBLake, Orange, Osceola, Seminole119 min
Aug 14, 4:24 PM EDTSpecial Weather StatementMLBOrange51 min
Aug 14, 4:33 PM EDTSevere Thunderstorm WarningMLBBrevard, Seminole, Volusia42 min
Aug 14, 4:56 PM EDTSpecial Weather StatementMLBOrange, Seminole49 min
Aug 14, 5:11 PM EDTSpecial Weather StatementMLBSeminole64 min
Aug 14, 5:20 PM EDTSpecial Marine WarningMLB64 min
Aug 14, 5:40 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange22 min
Aug 14, 5:51 PM EDTSpecial Weather StatementMLBOsceola39 min
Aug 14, 6:17 PM EDTSpecial Weather StatementMLBOsceola43 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.