Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 95, NWS Melbourne, FL

August 28, 2012Brevard County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 28, 2012, 5:05 PM EDT for Brevard County, Osceola County, Florida. It was in force for 40 min. 1 report 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: Aug 28, 2012, 5:05 PM EDT (21:05 UTC)
Expired: Aug 28, 2012, 5:45 PM EDT
In force: 40 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Brevard County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 4 km from the middle of the area, began a volume at 21:08 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

Time	Report	Where	Remark
Aug 28, 5:49 PM EDT	TSTM WND GST 40	Patrick Airforce Base, FL	PATRICK AFB REPORTED THUNDERSTORM WIND GUST OF 35 KT/40 MPH FROM 200 DEGREES.

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

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.1 hours before the alert went out and 39 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: 292 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 843 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 82 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.

845 
WUUS52 KMLB 282105
SVRMLB
FLC009-097-282145-
/O.NEW.KMLB.SV.W.0095.120828T2105Z-120828T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
505 PM EDT TUE AUG 28 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 545 PM EDT.

* AT 503 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR KENANSVILLE...AND MOVING
  NORTHEAST AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... 
PALM BAY...MALABAR...CAMP HOLLY FISH CAMP...WEST 
MELBOURNE...VIERA...SUNTREE...ROCKLEDGE AND COCOA.

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 2791 8049 2791 8051 2784 8050 2781 8105
      2837 8078 2837 8072 2836 8072 2837 8072
      2838 8066 2833 8065 2836 8064 2838 8059
      2826 8060 2813 8057 2794 8048
TIME...MOT...LOC 2103Z 205DEG 29KT 2786 8092

$$
RL

1 follow-up statement

448 
WWUS52 KMLB 282146
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
546 PM EDT TUE AUG 28 2012

FLC009-097-282156-
/O.EXP.KMLB.SV.W.0095.000000T0000Z-120828T2145Z/
OSCEOLA-BREVARD-
546 PM EDT TUE AUG 28 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN BREVARD AND EAST
CENTRAL OSCEOLA COUNTIES HAS EXPIRED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND SO THE 
WARNING WAS ALLOWED TO EXPIER.  HOWEVER...THE STORM WAS STILL STRONG 
AND CAPABLE OF PRODUCING 40 TO 50 MPH WINDS AND TORRENTIAL DOWNPOURS.

LAT...LON 2791 8049 2791 8051 2784 8050 2781 8105
      2837 8078 2837 8072 2836 8072 2837 8072
      2838 8066 2833 8065 2836 8064 2838 8059
      2826 8060 2813 8057 2794 8048
TIME...MOT...LOC 2105Z 205DEG 29KT 2787 8091

$$
RL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 28, 2:31 PM EDT	Special Weather Statement	MLB	Indian River, Martin, Saint Lucie	59 min
Aug 28, 3:11 PM EDT	Special Weather Statement	MLB	Brevard	49 min
Aug 28, 3:50 PM EDT	Special Marine Warning	MLB		85 min
Aug 28, 4:13 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee, Osceola	62 min
Aug 28, 4:50 PM EDT	Special Weather Statement	MLB	Volusia	25 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.