Alert archive / Florida / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 13, NWS Melbourne, FL

March 6, 2014Martin County, Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Mar 6, 2014, 2:59 PM EST for Martin County, Okeechobee County, Saint Lucie 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: Mar 6, 2014, 2:59 PM EST (19:59 UTC)
Expired: Mar 6, 2014, 3:30 PM EST
In force: 31 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

Counties Martin County, FL, Okeechobee County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 110 km from the middle of the area, began a volume at 19:59 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 6, 11:28 AM EST	Tornado Watch	SPC	5 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 8.0 hours before the alert went out and 150 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: 888 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 75 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

025 
WUUS52 KMLB 061959
SVRMLB
FLC085-093-111-062030-
/O.NEW.KMLB.SV.W.0013.140306T1959Z-140306T2030Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
259 PM EST THU MAR 6 2014

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN MARTIN COUNTY IN FLORIDA
  SOUTHEASTERN OKEECHOBEE COUNTY IN FLORIDA
  SOUTHWESTERN ST. LUCIE COUNTY IN FLORIDA

* UNTIL 330 PM EST.

* AT 253 PM EST...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        
  OVER LAKE OKEECHOBEE NEAR NEAR J AND S FISH CAMP...AND MOVING      
  NORTHEAST AT 40 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED       
  TO...OKEECHOBEE...TAYLOR CREEK...STATE ROAD 710...TREASURE         
  ISLAND...INDIANTOWN...AND FOUR SEASONS ESTATES

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.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A SMALL INTERIOR ROOM.

&&

LAT...LON 2696 8062 2699 8062 2706 8066 2710 8067
      2718 8075 2720 8080 2719 8083 2715 8086
      2717 8091 2752 8072 2716 8029 2695 8052
TIME...MOT...LOC 1958Z 219DEG 34KT 2710 8068

$$


MOSES

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 6, 12:48 PM EST	Special Marine Warning	MLB		87 min
Mar 6, 2:38 PM EST	Special Weather Statement	MLB	Martin, Okeechobee, Saint Lucie	52 min
Mar 6, 3:11 PM EST	Special Marine Warning	MLB		2 hr
Mar 6, 3:13 PM EST	Tornado Warning	MLB	Martin, Saint Lucie	47 min
Mar 6, 3:25 PM EST	Tornado Warning	MLB	Martin	35 min
Mar 6, 3:30 PM EST	Tornado Warning	MLB	Martin, Okeechobee, Saint Lucie	60 min

Nearby

Severe Thunderstorm Warnings in Florida, 2014 Every severe thunderstorm warning in 2014

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.