Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 62, NWS Melbourne, FL

July 4, 2012Lake County, Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 4, 2012, 3:08 PM EDT for Lake County, Orange County, Florida. It was in force for 23 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: Jul 4, 2012, 3:08 PM EDT (19:08 UTC)
Expired: Jul 4, 2012, 3:31 PM EDT
In force: 23 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Lake County, FL, Orange County, FL

The radar

The Melbourne radar (KMLB), 114 km from the middle of the area, began a volume at 19:12 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
Jul 4, 3:10 PM EDT	HAIL 0.88	6 Sse Ferndale, FL	NICKEL-SIZED HAIL REPORTED JUST BEYOND EXIT 272 ON THE FLORIDA TURNPIKE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 7.1 hours before the alert went out and 115 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: 1113 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 1038 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: -12 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.

655 
WUUS52 KMLB 041908
SVRMLB
FLC069-095-042000-
/O.NEW.KMLB.SV.W.0062.120704T1908Z-120704T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
308 PM EDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL LAKE COUNTY IN FLORIDA
  WEST CENTRAL ORANGE COUNTY IN FLORIDA

* UNTIL 400 PM EDT.

* AT 307 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
  FERNDALE...AND MOVING WEST AT 5 MPH.

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

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 2848 8178 2866 8178 2861 8160 2849 8162
TIME...MOT...LOC 1908Z 088DEG 4KT 2856 8168

$$


WEITLICH

2 follow-up statements

525 
WWUS52 KMLB 041921
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
321 PM EDT WED JUL 4 2012

FLC069-095-042000-
/O.CON.KMLB.SV.W.0062.000000T0000Z-120704T2000Z/
ORANGE-LAKE-
321 PM EDT WED JUL 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR SOUTH CENTRAL LAKE AND WEST CENTRAL ORANGE COUNTIES...

AT 320 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 MONTVERDE...OR NEAR FERNDALE...THAT WAS NEARLY 
STATIONARY.

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

LAT...LON 2848 8178 2866 8178 2861 8160 2849 8162
TIME...MOT...LOC 1921Z 092DEG 4KT 2856 8170

$$


WEITLICH

142 
WWUS52 KMLB 041931
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
331 PM EDT WED JUL 4 2012

FLC069-095-041941-
/O.CAN.KMLB.SV.W.0062.000000T0000Z-120704T2000Z/
ORANGE-LAKE-
331 PM EDT WED JUL 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL LAKE AND WEST
CENTRAL ORANGE COUNTIES 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...GUSTY WINDS... 
HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE 
POSSIBLE.

LAT...LON 2848 8178 2866 8178 2861 8160 2849 8162
TIME...MOT...LOC 1931Z 143DEG 2KT 2857 8170

$$


WEITLICH

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, 8:19 PM EDT	Severe Thunderstorm Warning	MLB	Lake	28 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, 3:17 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.