Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 56, NWS Melbourne, FL

June 14, 2011Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 14, 2011, 5:59 PM EDT for Osceola County, Florida. It was in force for 50 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 14, 2011, 5:59 PM EDT (21:59 UTC)
Expired
Jun 14, 2011, 6:49 PM EDT
In force
50 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

County Osceola County, FL

The radar

The Melbourne radar (KMLB), 66 km from the middle of the area, began a volume at 21:59 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, 10.0 hours before the alert went out and 93 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 2011-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 271 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 2011-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 32 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
271 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1216 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
32 m²/s²
0-3 km storm-relative helicity
16 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.

556 
WUUS52 KMLB 142159
SVRMLB
FLC097-142300-
/O.NEW.KMLB.SV.W.0056.110614T2159Z-110614T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
559 PM EDT TUE JUN 14 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 700 PM EDT.

* AT 559 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR HARMONY...OR 7 MILES
  NORTHWEST OF HOLOPAW...AND MOVING SOUTH AT 10 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  LAKE KISSIMMEE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 2806 8145 2802 8138 2806 8135 2807 8135
      2808 8145 2809 8146 2824 8130 2830 8092
      2793 8088 2783 8124 2785 8129 2799 8139
      2800 8141 2804 8146
TIME...MOT...LOC 2159Z 342DEG 10KT 2819 8114

$$


52
1 follow-up statement
999 
WWUS52 KMLB 142249
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
649 PM EDT TUE JUN 14 2011

FLC097-142259-
/O.CAN.KMLB.SV.W.0056.000000T0000Z-110614T2300Z/
OSCEOLA-
649 PM EDT TUE JUN 14 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL OSCEOLA COUNTY IS
CANCELLED...

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

LAT...LON 2806 8145 2802 8138 2806 8135 2807 8135
      2808 8145 2809 8146 2824 8130 2830 8092
      2793 8088 2783 8124 2785 8129 2799 8139
      2800 8141 2804 8146
TIME...MOT...LOC 2249Z 342DEG 10KT 2806 8109

$$


52

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 14, 1:46 PM EDTSpecial Weather StatementMLBOrange44 min
Jun 14, 2:29 PM EDTSpecial Weather StatementMLBOsceola61 min
Jun 14, 2:43 PM EDTSpecial Weather StatementMLBSeminole47 min
Jun 14, 2:44 PM EDTSpecial Marine WarningMLB91 min
Jun 14, 2:46 PM EDTSevere Thunderstorm WarningMLBBrevard, Volusia44 min
Jun 14, 2:51 PM EDTSevere Thunderstorm WarningMLBOsceola54 min
Jun 14, 3:03 PM EDTSevere Thunderstorm WarningMLBBrevard, Osceola42 min
Jun 14, 3:29 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange, Seminole, Volusia61 min
Jun 14, 3:59 PM EDTSpecial Marine WarningMLB91 min
Jun 14, 4:25 PM EDTSpecial Marine WarningMLB80 min
Jun 14, 5:04 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola56 min
Jun 14, 5:18 PM EDTSpecial Weather StatementMLBMartin42 min
Jun 14, 5:21 PM EDTSevere Thunderstorm WarningMLBMartin, Saint Lucie39 min
Jun 14, 5:33 PM EDTSpecial Marine WarningMLB87 min
Jun 14, 5:35 PM EDTSpecial Weather StatementMLBSeminole40 min
Jun 14, 5:57 PM EDTSevere Thunderstorm WarningMLBMartin42 min
Jun 14, 6:19 PM EDTSpecial Weather StatementMLBSeminole41 min
Jun 14, 6:29 PM EDTSevere Thunderstorm WarningMLBBrevard, Orange48 min
Jun 14, 7:17 PM EDTSpecial Weather StatementMLBSeminole, Volusia43 min

Nearby

Severe Thunderstorm Warnings in Florida, 2011Every 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.