Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 44, NWS Melbourne, FL

June 7, 2012Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 7, 2012, 6:30 PM EDT for Brevard County, Florida. It was in force for 30 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: Jun 7, 2012, 6:30 PM EDT (22:30 UTC)
Expired: Jun 7, 2012, 7:00 PM EDT
In force: 30 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 33 km from the middle of the area, began a volume at 22:31 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
Jun 7, 6:50 PM EDT	TSTM WND GST 47	8 Sse Playalinda Beach, FL	USAF 54 FT WIND TOWER NUMBER 108 MEASURED A 41 KT/47 MPH THUNDERSTORM WIND GUST FROM THE SOUTHWEST.

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, 10.5 hours before the alert went out and 17 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: 1118 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 831 m above ground
0-6 km bulk shear: 13 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.

855 
WUUS52 KMLB 072230
SVRMLB
FLC009-072300-
/O.NEW.KMLB.SV.W.0044.120607T2230Z-120607T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
630 PM EDT THU JUN 7 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BREVARD COUNTY IN FLORIDA

* UNTIL 700 PM EDT.

* AT 626 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 MERRITT ISLAND...AND MOVING
  NORTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  PORT CANAVERAL AND KENNEDY SPACE CENTER

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 2844 8055 2840 8058 2831 8060 2830 8064
      2831 8065 2828 8067 2825 8075 2840 8086
      2848 8076 2843 8075 2841 8073 2850 8074
      2862 8059 2859 8057 2845 8052
TIME...MOT...LOC 2231Z 224DEG 25KT 2842 8065

$$

SEDLOCK

2 follow-up statements

853 
WWUS52 KMLB 072240
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
640 PM EDT THU JUN 7 2012

FLC009-072300-
/O.CON.KMLB.SV.W.0044.000000T0000Z-120607T2300Z/
BREVARD-
640 PM EDT THU JUN 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT 
FOR NORTH BREVARD COUNTY...

AT 635 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR PORT CANAVERAL...
MOVING NORTHEAST AT 30 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS
OF THE INDICATED COUNTY.

LAT...LON 2844 8055 2840 8058 2836 8059 2835 8063
      2845 8080 2848 8076 2843 8075 2841 8073
      2850 8074 2862 8059 2859 8057 2845 8052
TIME...MOT...LOC 2239Z 213DEG 31KT 2849 8061

$$

SEDLOCK

333 
WWUS52 KMLB 072257
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
657 PM EDT THU JUN 7 2012

FLC009-072306-
/O.EXP.KMLB.SV.W.0044.000000T0000Z-120607T2300Z/
BREVARD-
657 PM EDT THU JUN 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BREVARD COUNTY WILL 
EXPIRE AT 700 PM EDT...

THE SEVERE STORM THAT PROMPTED THE WARNING WAS EXITING THE COAST 
INTO THE NEAR SHORE WATERS OF THE WESTERN ATLANTIC...THUS THE 
WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 2844 8055 2840 8058 2836 8059 2835 8063
      2845 8080 2848 8076 2843 8075 2841 8073
      2850 8074 2862 8059 2859 8057 2845 8052
TIME...MOT...LOC 2256Z 213DEG 31KT 2861 8052

$$

SEDLOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 8:26 AM EDT	Special Weather Statement	MLB	Seminole	64 min
Jun 7, 4:59 PM EDT	Special Weather Statement	MLB	Saint Lucie	46 min
Jun 7, 5:04 PM EDT	Special Weather Statement	MLB	Indian River	56 min
Jun 7, 5:42 PM EDT	Special Marine Warning	MLB		2 hr
Jun 7, 6:01 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Osceola	59 min
Jun 7, 6:18 PM EDT	Special Marine Warning	MLB		87 min
Jun 7, 7:01 PM EDT	Tornado Warning	MLB	Indian River	9 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.