Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 38, NWS Melbourne, FL

May 19, 2012Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 19, 2012, 3:31 PM EDT for Martin County, Florida. It was in force for 44 min. 4 reports 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: May 19, 2012, 3:31 PM EDT (19:31 UTC)
Expired: May 19, 2012, 4:15 PM EDT
In force: 44 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Martin County, FL

The radar

The Melbourne radar (KMLB), 110 km from the middle of the area, began a volume at 19:33 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
May 19, 3:37 PM EDT	HAIL 0.5	3 Sse Palm City, FL
May 19, 3:50 PM EDT	HAIL 1	3 Sse Juno Beach, FL	SKYWARN SPOTTER IN SOUTHWEST STUART MEASURED ONE INCH HAIL AND WIND GUST TO 34 MPH.
May 19, 3:50 PM EDT	HAIL 1	5 Ssw Jensen Beach, FL	SKYWARN SPOTTER IN PALM CITY REPORTED QUARTER SIZE HAIL FROM 350 PM TO 4 PM.
May 19, 3:55 PM EDT	HAIL 1	5 Sw Jensen Beach, FL	SKYWARN SPOTTER IN PALM CITY OBSERVED NICKEL TO QUARTER SIZE HAIL.

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

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 7.5 hours before the alert went out and 144 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: 563 J/kg
Mixed-layer CIN: -34 J/kg
Mixed-layer LCL: 981 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 97 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.

341 
WUUS52 KMLB 191931
SVRMLB
FLC085-192015-
/O.NEW.KMLB.SV.W.0038.120519T1931Z-120519T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
331 PM EDT SAT MAY 19 2012

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 415 PM EDT.

* AT 324 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
  PALM CITY...AND MOVING NORTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
  PORT SALERNO...STUART...NORTH RIVER SHORES...ROCKY POINT AND JENSEN
  BEACH

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...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.

DAMAGING WINDS UP TO MPH WERE REPORTED IN THE STUART AREA WITH THIS 
STORM. THIS IS A DANGEROUS STORM...SEEK SAFE SHELTER AND STAY AWAY 
FROM WINDOWS!

HAIL UP TO QUARTER SIZE IN DIAMETER HAS BEEN REPORTED IN STUART WITH 
THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE 
ACTION TO PROTECT LIFE AND PROPERTY.

BOATERS ON THE INTRACOASTAL WATER WAY AND SAINT LUCIE RIVER AREAS 
SHOULD SEEK SAFE HARBOR IMMEDIATELY!

&&

LAT...LON 2706 8028 2720 8033 2721 8028 2726 8028
      2727 8025 2726 8022 2727 8020 2724 8017
      2721 8017 2721 8015 2715 8015
TIME...MOT...LOC 1928Z 221DEG 12KT 2713 8026

$$

67

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 2:03 PM EDT	Special Weather Statement	MLB	Indian River, Okeechobee	57 min
May 19, 2:10 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Okeechobee, Saint Lucie	50 min
May 19, 2:52 PM EDT	Severe Thunderstorm Warning	MLB	Martin	38 min
May 19, 3:22 PM EDT	Special Weather Statement	MLB	Okeechobee	38 min
May 19, 3:26 PM EDT	Special Marine Warning	MLB		49 min
May 19, 3:32 PM EDT	Tornado Warning	MLB	Martin, Okeechobee, Saint Lucie	43 min
May 19, 4:15 PM EDT	Special Marine Warning	MLB		104 min
May 19, 4:17 PM EDT	Special Weather Statement	MLB	Martin	43 min
May 19, 4:24 PM EDT	Special Weather Statement	MLB	Martin	36 min
May 19, 4:39 PM EDT	Special Weather Statement	MLB	Osceola	51 min
May 19, 5:29 PM EDT	Special Weather Statement	MLB	Osceola	46 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.