Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 92, NWS Melbourne, FL

August 21, 2012Brevard County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Aug 21, 2012, 5:12 PM EDT for Brevard County, Osceola County, Florida. It was in force for 20 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 21, 2012, 5:12 PM EDT (21:12 UTC)
Expired: Aug 21, 2012, 5:32 PM EDT
In force: 20 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Brevard County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 18 km from the middle of the area, began a volume at 21:11 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 21, 5:30 PM EDT	TSTM WND DMG	Cocoa Beach, FL	LARGE PLATE GLASS WINDOW BLOWN IN AND SCREEN DAMAGE ON 200 BLOCK BANANA RIVER BLVD. REPORT FROM WRDQ

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, 9.2 hours before the alert went out and 26 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: 318 J/kg
Mixed-layer CIN: -106 J/kg
Mixed-layer LCL: 1227 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 44 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.

299 
WUUS52 KMLB 212112
SVRMLB
FLC009-097-212215-
/O.NEW.KMLB.SV.W.0092.120821T2112Z-120821T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
512 PM EDT TUE AUG 21 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 615 PM EDT.

* AT 507 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 12 MILES WEST OF CAMP HOLLY FISH
  CAMP...OR 8 MILES SOUTHEAST OF HOLOPAW...AND MOVING NORTHEAST AT 20
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO... 
MELBOURNE...MELBOURNE BEACH...INDIALANTIC...SUNTREE...INDIAN HARBOUR 
BEACH...VIERA...SATELLITE BEACH...ROCKLEDGE...PATRICK AIRFORCE 
BASE...PORT CANAVERAL...MERRITT  ISLAND...CAPE CANAVERAL AND COCOA 
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 2843 8057 2840 8059 2826 8060 2803 8053
      2803 8054 2803 8056 2813 8061 2803 8057
      2798 8101 2815 8104 2845 8065 2841 8065
      2842 8062 2848 8061 2853 8056 2845 8052
TIME...MOT...LOC 2112Z 226DEG 18KT 2810 8093

$$


WEITLICH

1 follow-up statement

622 
WWUS52 KMLB 212132
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
532 PM EDT TUE AUG 21 2012

FLC009-097-212141-
/O.CAN.KMLB.SV.W.0092.000000T0000Z-120821T2215Z/
OSCEOLA-BREVARD-
532 PM EDT TUE AUG 21 2012

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BREVARD AND EAST
CENTRAL OSCEOLA COUNTIES IS CANCELLED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED AND WAS NO 
LONGER CAPABLE OF PRODUCING DAMAGING WINDS. AS A RESULT...THE 
WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN...STRONG WIND GUSTS 
AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE.

LAT...LON 2843 8057 2840 8059 2826 8060 2803 8053
      2803 8054 2803 8056 2813 8061 2803 8057
      2798 8101 2815 8104 2845 8065 2841 8065
      2842 8062 2848 8061 2853 8056 2845 8052
TIME...MOT...LOC 2131Z 226DEG 18KT 2821 8071

$$


WEITLICH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 11:28 PM EDT	Special Weather Statement	MLB	Orange	47 min
Aug 21, 1:33 PM EDT	Special Weather Statement	MLB	Lake	57 min
Aug 21, 2:39 PM EDT	Special Marine Warning	MLB		66 min
Aug 21, 2:53 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	37 min
Aug 21, 3:10 PM EDT	Special Marine Warning	MLB		2 hr
Aug 21, 3:12 PM EDT	Areal Flood Advisory	MLB	Lake	93 min
Aug 21, 3:15 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Volusia	45 min
Aug 21, 3:25 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole, Volusia	31 min
Aug 21, 3:37 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Lake, Martin, Okeechobee, Orange and 4 more	53 min
Aug 21, 3:41 PM EDT	Special Marine Warning	MLB		94 min
Aug 21, 3:54 PM EDT	Areal Flood Advisory	MLB	Lake, Orange, Seminole, Volusia	81 min
Aug 21, 4:24 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee	45 min
Aug 21, 4:37 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Martin, Okeechobee, Osceola, Saint Lucie	53 min
Aug 21, 4:37 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	38 min
Aug 21, 4:49 PM EDT	Severe Thunderstorm Warning	MLB	Martin, Okeechobee, Saint Lucie	34 min
Aug 21, 5:06 PM EDT	Special Marine Warning	MLB		84 min
Aug 21, 5:06 PM EDT	Severe Thunderstorm Warning	MLB	Indian River	24 min
Aug 21, 5:08 PM EDT	Special Marine Warning	MLB		82 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.