Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Melbourne, FL

May 14, 20114 counties in Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 14, 2011, 2:52 PM EDT for 4 counties in Florida. It was in force for 53 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: May 14, 2011, 2:52 PM EDT (18:52 UTC)
Expired: May 14, 2011, 3:45 PM EDT
In force: 53 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Brevard County, FL, Orange County, FL, Seminole County, FL, Volusia County, FL

The radar

The Melbourne radar (KMLB), 79 km from the middle of the area, began a volume at 18:53 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, 6.9 hours before the alert went out and 62 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: 172 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1364 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -23 m²/s²
0-3 km storm-relative helicity: 14 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.

489 
WUUS52 KMLB 141852
SVRMLB
FLC009-095-117-127-141945-
/O.NEW.KMLB.SV.W.0039.110514T1852Z-110514T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
252 PM EDT SAT MAY 14 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL ORANGE COUNTY IN FLORIDA
  SEMINOLE COUNTY IN FLORIDA
  NORTHWESTERN BREVARD COUNTY IN FLORIDA
  SOUTHEASTERN VOLUSIA COUNTY IN FLORIDA

* UNTIL 345 PM EDT.

* AT 244 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  A CLUSTER OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
  SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORMS WERE
  LOCATED NEAR FAIRVIEW SHORES...AND MOVING NORTHEAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  UNION PARK...WINTER SPRINGS...LAKE JESSUP...OVIEDO...BITHLO...
  GENEVA...MAYTOWN...MIMS AND SCOTTSMOOR

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 2892 8097 2869 8083 2864 8081 2849 8135
      2867 8144
TIME...MOT...LOC 1852Z 249DEG 42KT 2861 8128

$$

3 follow-up statements

278 
WWUS52 KMLB 141913
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
313 PM EDT SAT MAY 14 2011

FLC009-095-117-127-141945-
/O.CON.KMLB.SV.W.0039.000000T0000Z-110514T1945Z/
ORANGE-SEMINOLE-VOLUSIA-BREVARD-
313 PM EDT SAT MAY 14 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHWESTERN BREVARD...SOUTHEASTERN VOLUSIA...SEMINOLE AND
CENTRAL ORANGE COUNTIES...

AT 303 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED
TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS 
LOCATED NEAR WINTER SPRINGS...MOVING NORTHEAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
GENEVA...PALM SHADOWS...MULLET LAKE PARK...LAKE HARNEY...FARMTON...
LAGRANGE...MIMS...MAYTOWN...TURNBULL AND AURANTIA

LAT...LON 2892 8097 2869 8083 2864 8081 2849 8135
      2867 8144
TIME...MOT...LOC 1913Z 235DEG 29KT 2871 8117

$$



CRISTALDI

045 
WWUS52 KMLB 141939
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
339 PM EDT SAT MAY 14 2011

FLC009-095-117-127-141945-
/O.CON.KMLB.SV.W.0039.000000T0000Z-110514T1945Z/
ORANGE-SEMINOLE-VOLUSIA-BREVARD-
339 PM EDT SAT MAY 14 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHWESTERN BREVARD...SOUTHEASTERN VOLUSIA...SEMINOLE AND
CENTRAL ORANGE COUNTIES...

AT 333 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WINTER SPRINGS...MOVING NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO LAKE
JESSUP...CHULUOTA...TURNBULL...PALM SHADOWS...MULLET LAKE PARK...
MIMS...MAYTOWN...LAKE HARNEY...LAGRANGE...GENEVA...FARMTON AND
AURANTIA

LAT...LON 2892 8097 2869 8083 2864 8081 2849 8135
      2867 8144
TIME...MOT...LOC 1940Z 234DEG 28KT 2869 8120

$$

085 
WWUS52 KMLB 141947
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
347 PM EDT SAT MAY 14 2011

FLC009-095-117-127-141956-
/O.EXP.KMLB.SV.W.0039.000000T0000Z-110514T1945Z/
ORANGE-SEMINOLE-VOLUSIA-BREVARD-
347 PM EDT SAT MAY 14 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN BREVARD...
SOUTHEASTERN VOLUSIA...SEMINOLE AND CENTRAL ORANGE COUNTIES HAS
EXPIRED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAD WEAKENED...THUS THE 
WARNING HAS BEEN ALLOWED TO EXPIRE.

STRONG STORMS WERE STILL CAPABLE OF PRODUCING BRIEF GUSTY WINDS...
SMALL HAIL AND FREQUENT LIGHTNING FROM WINTER SPRINGS TO OVIEDO.

LAT...LON 2892 8097 2869 8083 2864 8081 2849 8135
      2867 8144
TIME...MOT...LOC 1939Z 234DEG 28KT 2868 8121

$$




CRISTALDI

The office that day

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

Issued	Product	Office	Counties	Lasted
May 13, 8:11 PM EDT	Special Marine Warning	MLB		94 min
May 14, 12:57 PM EDT	Special Weather Statement	MLB	Okeechobee	63 min
May 14, 1:19 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee, Osceola	56 min
May 14, 2:03 PM EDT	Special Weather Statement	MLB	Brevard, Indian River, Okeechobee, Osceola, Saint Lucie	42 min
May 14, 2:09 PM EDT	Special Marine Warning	MLB		111 min
May 14, 2:10 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Osceola	44 min
May 14, 2:17 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Okeechobee, Saint Lucie	40 min
May 14, 2:40 PM EDT	Special Weather Statement	MLB	Orange, Seminole	50 min
May 14, 3:04 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	45 min
May 14, 3:17 PM EDT	Special Marine Warning	MLB		118 min
May 14, 3:21 PM EDT	Special Weather Statement	MLB	Lake	69 min
May 14, 3:26 PM EDT	Special Weather Statement	MLB	Martin	64 min
May 14, 3:43 PM EDT	Severe Thunderstorm Warning	MLB	Martin	57 min
May 14, 3:45 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	60 min
May 14, 3:53 PM EDT	Special Marine Warning	MLB		112 min
May 14, 3:58 PM EDT	Special Marine Warning	MLB		92 min
May 14, 4:00 PM EDT	Special Weather Statement	MLB	Orange, Seminole	45 min
May 14, 4:23 PM EDT	Tornado Warning	MLB	Martin	14 min
May 14, 4:44 PM EDT	Special Weather Statement	MLB	Osceola	46 min
May 14, 5:18 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee, Saint Lucie	72 min
May 14, 5:29 PM EDT	Special Weather Statement	MLB	Martin	46 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.