Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 23, NWS Melbourne, FL

May 14, 2012Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 14, 2012, 4:37 PM EDT for Martin 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: May 14, 2012, 4:37 PM EDT (20:37 UTC)
Expired: May 14, 2012, 5:05 PM EDT
In force: 28 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Martin County, FL

The radar

The Melbourne radar (KMLB), 125 km from the middle of the area, began a volume at 20:37 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

Miami, FL (KMFL), launched 12:00Z, 8.6 hours before the alert went out and 133 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: 1180 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 651 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 24 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.

958 
WUUS52 KMLB 142037
SVRMLB
FLC085-142115-
/O.NEW.KMLB.SV.W.0023.120514T2037Z-120514T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
437 PM EDT MON MAY 14 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MARTIN COUNTY IN FLORIDA

* UNTIL 515 PM EDT.

* AT 432 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
  INDIANTOWN. THIS STORM WAS NEARLY STATIONARY.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL
  AREAS OF THE INDICATED COUNTY.

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 2695 8049 2708 8052 2716 8034 2701 8017
      2695 8032
TIME...MOT...LOC 2037Z 322DEG 2KT 2708 8040

$$


WEITLICH

1 follow-up statement

748 
WWUS52 KMLB 142105
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
505 PM EDT MON MAY 14 2012

FLC085-142110-
/O.CAN.KMLB.SV.W.0023.000000T0000Z-120514T2115Z/
MARTIN-
505 PM EDT MON MAY 14 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MARTIN COUNTY IS
CANCELLED...

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

OTHER STRONG STORMS WERE DEVELOPING JUST WEST OF THE WARNING BOX 
NEAR PORT MAYACA IN SOUTHWEST MARTIN COUNTY. THESE STORMS MAY 
EXHIBIT WEAK ROTATION...GUSTY DOWNBURST WINDS...FREQUENT CLOUD TO 
GROUND LIGHTNING AND TORRENTIAL DOWNPOURS.

LAT...LON 2695 8049 2708 8052 2716 8034 2701 8017
      2695 8032
TIME...MOT...LOC 2100Z 322DEG 2KT 2707 8039

$$

SEDLOCK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 14, 3:24 PM EDT	Special Weather Statement	MLB	Lake	51 min
May 14, 4:21 PM EDT	Special Weather Statement	MLB	Martin	39 min
May 14, 4:45 PM EDT	Tornado Warning	MLB	Martin	17 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.