Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 67, NWS Melbourne, FL

June 17, 2011Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 17, 2011, 4:14 PM EDT for Martin County, Florida. It was in force for 31 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: Jun 17, 2011, 4:14 PM EDT (20:14 UTC)
Expired: Jun 17, 2011, 4:45 PM EDT
In force: 31 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 20:18 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, 8.2 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: 2398 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: -56 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.

297 
WUUS52 KMLB 172014
SVRMLB
FLC085-172100-
/O.NEW.KMLB.SV.W.0067.110617T2014Z-110617T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
414 PM EDT FRI JUN 17 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 500 PM EDT.

* AT 408 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...AND MOVING SOUTH AT 5 MPH.

* 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.

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 2696 8050 2703 8048 2710 8044 2709 8035
      2696 8034 2695 8050
TIME...MOT...LOC 2014Z 020DEG 4KT 2704 8040

$$


KELLY

1 follow-up statement

089 
WWUS52 KMLB 172045
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
445 PM EDT FRI JUN 17 2011

FLC085-172055-
/O.CAN.KMLB.SV.W.0067.000000T0000Z-110617T2100Z/
MARTIN-
445 PM EDT FRI JUN 17 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MARTIN 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 2696 8050 2703 8048 2710 8044 2709 8035
      2696 8034 2695 8050
TIME...MOT...LOC 2045Z 020DEG 4KT 2701 8041

$$


KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 2:55 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	50 min
Jun 17, 3:41 PM EDT	Special Weather Statement	MLB	Martin, Saint Lucie	49 min
Jun 17, 3:47 PM EDT	Special Weather Statement	MLB	Okeechobee	58 min
Jun 17, 4:06 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	39 min
Jun 17, 4:45 PM EDT	Severe Thunderstorm Warning	MLB	Osceola	44 min
Jun 17, 5:15 PM EDT	Special Weather Statement	MLB	Orange	60 min
Jun 17, 5:49 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	56 min
Jun 17, 6:02 PM EDT	Severe Thunderstorm Warning	MLB	Seminole, Volusia	58 min
Jun 17, 6:11 PM EDT	Special Weather Statement	MLB	Lake	49 min
Jun 17, 6:36 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Volusia	54 min
Jun 17, 6:48 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	57 min
Jun 17, 7:02 PM EDT	Special Marine Warning	MLB		118 min
Jun 17, 7:17 PM EDT	Severe Thunderstorm Warning	MLB	Volusia	42 min
Jun 17, 7:32 PM EDT	Special Weather Statement	MLB	Volusia	43 min
Jun 17, 7:41 PM EDT	Areal Flood Advisory	MLB	Lake, Volusia	2 hr
Jun 17, 7:41 PM EDT	Special Weather Statement	MLB	Lake	49 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.