Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 60, NWS Melbourne, FL

July 3, 2012Lake County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 3, 2012, 8:19 PM EDT for Lake County, Florida. It was in force for 28 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: Jul 3, 2012, 8:19 PM EDT (00:19 UTC)
Expired: Jul 3, 2012, 8:47 PM EDT
In force: 28 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Lake County, FL

The radar

The Melbourne radar (KMLB), 115 km from the middle of the area, began a volume at 00:22 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

Tampa Bay, FL (KTBW), launched 00:00Z, 0.3 hours before the alert went out and 117 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: 514 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 1528 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 10 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.

378 
WUUS52 KMLB 040019
SVRMLB
FLC069-040115-
/O.NEW.KMLB.SV.W.0060.120704T0019Z-120704T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
819 PM EDT TUE JUL 3 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LAKE COUNTY IN FLORIDA

* UNTIL 915 PM EDT.

* AT 817 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CLERMONT...OR 6 MILES SOUTH OF FERNDALE...AND MOVING NORTHWEST AT
  10 MPH.

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

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.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT 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 2852 8187 2870 8175 2861 8166 2859 8166
      2859 8165 2858 8165 2856 8166 2851 8166
      2843 8167
TIME...MOT...LOC 0019Z 121DEG 10KT 2854 8171

$$


KELLY

2 follow-up statements

914 
WWUS52 KMLB 040030
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
830 PM EDT TUE JUL 3 2012

FLC069-040115-
/O.CON.KMLB.SV.W.0060.000000T0000Z-120704T0115Z/
LAKE-
830 PM EDT TUE JUL 3 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM EDT
FOR SOUTHERN LAKE COUNTY...

AT 827 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 JUST WEST OF MINNEOLA...MOVING NORTHWEST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL APPROACH STATE ROAD 19 NORTH OF 
GROVELAND. 

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 2851 8166 2846 8168 2847 8177 2852 8187
      2870 8175 2862 8167
TIME...MOT...LOC 0029Z 121DEG 10KT 2858 8178

$$


KELLY

438 
WWUS52 KMLB 040047
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
847 PM EDT TUE JUL 3 2012

FLC069-040056-
/O.CAN.KMLB.SV.W.0060.000000T0000Z-120704T0115Z/
LAKE-
847 PM EDT TUE JUL 3 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LAKE 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 2851 8166 2846 8168 2847 8177 2852 8187
      2870 8175 2862 8167
TIME...MOT...LOC 0046Z 121DEG 10KT 2860 8183

$$


KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 8:02 PM EDT	Special Weather Statement	MLB	Volusia	43 min
Jul 3, 8:15 PM EDT	Special Weather Statement	MLB	Lake	30 min
Jul 3, 8:42 PM EDT	Areal Flood Advisory	MLB	Lake, Volusia	93 min
Jul 3, 8:43 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	30 min
Jul 4, 1:48 PM EDT	Special Weather Statement	MLB	Brevard	42 min
Jul 4, 1:50 PM EDT	Special Weather Statement	MLB	Brevard	40 min
Jul 4, 2:37 PM EDT	Special Weather Statement	MLB	Brevard	38 min
Jul 4, 3:05 PM EDT	Special Weather Statement	MLB	Lake	40 min
Jul 4, 3:08 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	23 min
Jul 4, 3:17 PM EDT	Special Weather Statement	MLB	Osceola	58 min
Jul 4, 3:21 PM EDT	Special Weather Statement	MLB	Volusia	54 min
Jul 4, 3:25 PM EDT	Special Marine Warning	MLB		65 min
Jul 4, 4:01 PM EDT	Special Weather Statement	MLB	Indian River	59 min
Jul 4, 4:48 PM EDT	Areal Flood Advisory	MLB	Lake, Volusia	57 min
Jul 4, 4:57 PM EDT	Special Weather Statement	MLB	Indian River	48 min
Jul 4, 5:32 PM EDT	Areal Flood Advisory	MLB	Lake	58 min
Jul 4, 7:01 PM EDT	Special Weather Statement	MLB	Okeechobee	44 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.