Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 86, NWS Melbourne, FL

June 18, 2011Brevard County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 18, 2011, 8:59 PM EDT for Brevard 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: Jun 18, 2011, 8:59 PM EDT (00:59 UTC)
Expired: Jun 18, 2011, 9:30 PM EDT
In force: 31 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 15 km from the middle of the area, began a volume at 01:03 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 00:00Z, 1.0 hours before the alert went out and 29 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: 1052 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1196 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 7 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

670 
WUUS52 KMLB 190059
SVRMLB
FLC009-190130-
/O.NEW.KMLB.SV.W.0086.110619T0059Z-110619T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
859 PM EDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 930 PM EDT.

* AT 853 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 SUNTREE...OR 6 MILES WEST
  OF PATRICK AIRFORCE BASE...AND MOVING EAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  INDIAN HARBOUR BEACH AND SATELLITE 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 2815 8062 2816 8063 2815 8063 2813 8072
      2829 8079 2831 8071 2828 8069 2832 8069
      2833 8065 2831 8065 2829 8066 2823 8063
      2828 8061 2833 8063 2834 8060 2816 8058
TIME...MOT...LOC 0059Z 252DEG 12KT 2823 8069

$$

GUSEMAN

2 follow-up statements

185 
WWUS52 KMLB 190114
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
914 PM EDT SAT JUN 18 2011

FLC009-190130-
/O.CON.KMLB.SV.W.0086.000000T0000Z-110619T0130Z/
BREVARD-
914 PM EDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR CENTRAL BREVARD COUNTY...

AT 912 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 SATELLITE BEACH...
MOVING EAST AT 15 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PATRICK
AIRFORCE BASE

LAT...LON 2815 8062 2816 8063 2815 8063 2813 8072
      2829 8079 2831 8071 2828 8069 2832 8069
      2833 8065 2831 8065 2829 8066 2823 8063
      2828 8061 2833 8063 2834 8060 2816 8058
TIME...MOT...LOC 0114Z 252DEG 12KT 2820 8061

$$

GUSEMAN

871 
WWUS52 KMLB 190121
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
921 PM EDT SAT JUN 18 2011

FLC009-190131-
/O.EXP.KMLB.SV.W.0086.000000T0000Z-110619T0130Z/
BREVARD-
921 PM EDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL BREVARD COUNTY WILL
EXPIRE AT 930 PM EDT...

LAT...LON 2815 8062 2816 8063 2815 8063 2813 8072
      2829 8079 2831 8071 2828 8069 2832 8069
      2833 8065 2831 8065 2829 8066 2823 8063
      2828 8061 2833 8063 2834 8060 2816 8058
TIME...MOT...LOC 0121Z 252DEG 12KT 2821 8058

$$

GUSEMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 8:15 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange	45 min
Jun 18, 8:39 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Osceola	36 min
Jun 18, 9:18 PM EDT	Special Weather Statement	MLB	Brevard	27 min
Jun 18, 9:26 PM EDT	Areal Flood Advisory	MLB	Brevard	2 hr
Jun 19, 4:26 PM EDT	Special Weather Statement	MLB	Saint Lucie	49 min
Jun 19, 5:40 PM EDT	Special Weather Statement	MLB	Osceola	65 min
Jun 19, 6:22 PM EDT	Special Weather Statement	MLB	Osceola	53 min
Jun 19, 6:29 PM EDT	Special Weather Statement	MLB	Lake	61 min
Jun 19, 6:34 PM EDT	Areal Flood Advisory	MLB	Lake	116 min
Jun 19, 7:10 PM EDT	Special Weather Statement	MLB	Orange	65 min
Jun 19, 7:26 PM EDT	Areal Flood Advisory	MLB	Orange, Osceola	2 hr
Jun 19, 7:30 PM EDT	Severe Thunderstorm Warning	MLB	Orange	60 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011 Every severe thunderstorm warning in 2011

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.