Alert archive / Florida / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 73, NWS Melbourne, FL

September 30, 2016Martin County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Sep 30, 2016, 5:19 PM EDT for Martin County, Saint Lucie County, Florida. It was in force for 23 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, 5:19 PM EDT (21:19 UTC)
Expired: Sep 30, 2016, 5:42 PM EDT
In force: 23 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Martin County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 84 km from the middle of the area, began a volume at 21:20 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.3 hours before the alert went out and 120 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: 981 J/kg
Mixed-layer CIN: -32 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: -10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

631 
WUUS52 KMLB 302119
SVRMLB
FLC085-111-302215-
/O.NEW.KMLB.SV.W.0073.160930T2119Z-160930T2215Z/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 615 PM EDT

* AT 518 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED 7 MILES WEST OF
  PALM CITY...MOVING NORTHEAST 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...
  PORT SAINT LUCIE...WALTON...FORT PIERCE...STUART AND JENSEN BEACH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE IMMEDIATELY TO SHELTER INSIDE A STRONG BUILDING. STAY
AWAY FROM WINDOWS.

&&

LAT...LON 2709 8051 2754 8045 2756 8038 2756 8036
      2757 8035 2757 8033 2756 8033 2756 8032
      2725 8020 2702 8033
TIME...MOT...LOC 2118Z 203DEG 9KT 2713 8039 

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

DWS

1 follow-up statement

565 
WWUS52 KMLB 302142
SVSMLB

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

FLC085-111-302151-
/O.CAN.KMLB.SV.W.0073.000000T0000Z-160930T2215Z/
ST. LUCIE FL-MARTIN FL-
542 PM EDT FRI SEP 30 2016

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ST. LUCIE AND CENTRAL
MARTIN COUNTIES IS CANCELLED...
                
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING HAS BEEN CANCELLED.

HOWEVER GUSTY WINDS OF 30 TO 40 MPH...FREQUENT LIGHTNING AND TORRENTIAL
RAIN WILL STILL OCCUR WITH THESE THUNDERSTORMS.

LAT...LON 2709 8051 2754 8045 2756 8038 2756 8036
      2757 8035 2757 8033 2756 8033 2756 8032
      2725 8020 2702 8033
TIME...MOT...LOC 2139Z 203DEG 9KT 2718 8036 

$$

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, 4:43 PM EDT	Severe Thunderstorm Warning	MLB	Martin	40 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.