Alert archive / Florida / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 72, NWS Melbourne, FL

September 30, 2016Martin County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Sep 30, 2016, 4:43 PM EDT for Martin County, Florida. It was in force for 40 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: Sep 30, 2016, 4:43 PM EDT (20:43 UTC)
Expired: Sep 30, 2016, 5:23 PM EDT
In force: 40 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Martin County, FL

The radar

The Melbourne radar (KMLB), 122 km from the middle of the area, began a volume at 20:44 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, 8.7 hours before the alert went out and 136 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: 2306 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 856 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

378 
WUUS52 KMLB 302043
SVRMLB
FLC085-302145-
/O.NEW.KMLB.SV.W.0072.160930T2043Z-160930T2145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
443 PM EDT FRI SEP 30 2016

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 545 PM EDT

* AT 443 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR
  INDIANTOWN... MOVING NORTH AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE 
           TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  INDIANTOWN AND PORT MAYACA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 2697 8061 2702 8063 2703 8063 2710 8066
      2710 8044 2696 8044 2696 8061
TIME...MOT...LOC 2043Z 171DEG 8KT 2698 8051 

HAIL...1.00IN
WIND...60MPH
 
$$

CRISTALDI

1 follow-up statement

324 
WWUS52 KMLB 302123
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
523 PM EDT FRI SEP 30 2016

FLC085-302130-
/O.CAN.KMLB.SV.W.0072.000000T0000Z-160930T2145Z/
MARTIN FL-
523 PM EDT FRI SEP 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MARTIN COUNTY IS
CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE AREA.
THEREFORE...THE WARNING FOR THE SOUTHWESTERN POTION OF THE COUNTY
HAS BEEN CANCELLED. HOWEVER, A SEVERE THUNDERSTORM WARNING HAS BEEN
ISSUED FOR THE CENTRAL PART OF MARTIN COUNTY.

LAT...LON 2697 8061 2702 8063 2703 8063 2710 8066
      2710 8044 2696 8044 2696 8061
TIME...MOT...LOC 2117Z 171DEG 8KT 2706 8052 

$$

CRISTALDI

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 30, 4:02 PM EDT	Special Weather Statement	MLB	Lake	43 min
Sep 30, 4:13 PM EDT	Special Weather Statement	MLB	Saint Lucie	47 min
Sep 30, 5:19 PM EDT	Severe Thunderstorm Warning	MLB	Martin, Saint Lucie	23 min
Sep 30, 5:32 PM EDT	Special Weather Statement	MLB	Volusia	43 min
Sep 30, 5:37 PM EDT	Special Weather Statement	MLB	Seminole	38 min
Sep 30, 5:39 PM EDT	Special Weather Statement	MLB	Seminole	36 min
Sep 30, 5:51 PM EDT	Special Weather Statement	MLB	Flagler	39 min
Sep 30, 5:54 PM EDT	Special Marine Warning	MLB		96 min
Sep 30, 5:58 PM EDT	Special Weather Statement	MLB	Martin	47 min
Sep 30, 6:18 PM EDT	Special Weather Statement	MLB	Seminole, Volusia	42 min
Sep 30, 6:33 PM EDT	Special Weather Statement	MLB	Indian River	42 min
Sep 30, 6:36 PM EDT	Special Marine Warning	MLB		54 min
Sep 30, 6:43 PM EDT	Special Marine Warning	MLB		62 min
Sep 30, 7:20 PM EDT	Areal Flood Advisory	MLB	Volusia	85 min

Nearby

Severe Thunderstorm Warnings in Florida, 2016 Every severe thunderstorm warning in 2016

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.