Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 64, NWS Melbourne, FL

June 15, 2011Martin County, Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 15, 2011, 5:20 PM EDT for Martin County, Okeechobee County, Saint Lucie County, Florida. It was in force for 55 min. 2 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: Jun 15, 2011, 5:20 PM EDT (21:20 UTC)
Expired: Jun 15, 2011, 6:15 PM EDT
In force: 55 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), 107 km from the middle of the area, began a volume at 21:23 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
Jun 15, 5:45 PM EDT	HAIL 1.75	11 Nnw Indiantown, FL	PUBLIC REPORT RELAYED THROUGH SHERIFFS OFFICE OF GOLF BALL SIZE HAIL NEAR MARTIN HWY AT FOX BROWN RD.
Jun 15, 5:50 PM EDT	TSTM WND DMG	10 Nnw Indiantown, FL	MULTIPLE TREES DOWN. TREES APPROX 3-4 INCHES IN DIAMETER AND 7-8 FT TALL. ON MARTIN HWY BETWEEN FOX BROWN RD AND ALLAPATTAH RD.

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

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 15, 1:52 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.3 hours before the alert went out and 147 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: 1201 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1168 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

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

564 
WUUS52 KMLB 152120
SVRMLB
FLC085-093-111-152215-
/O.NEW.KMLB.SV.W.0064.110615T2120Z-110615T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
520 PM EDT WED JUN 15 2011

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 615 PM EDT.

* AT 514 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 10     
  MILES WEST OF PORT SAINT LUCIE...AND MOVING SOUTH AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED       
  TO...FOUR SEASONS ESTATES...TAYLOR CREEK...INDIANTOWN...PORT       
  MAYACA...STATE ROAD 70...AND STATE ROAD 710.

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.

QUARTER SIZED HAIL WAS REPORTED IN CARLTON AROUND 5 PM EDT WITH THIS 
STORM. DIME SIZED HAIL WAS REPORTED EARLIER WITH THESE STORMS NEAR 
INDRIO AND I-95. IF YOU ARE IN THE PATH OF THE STORM...TAKE 
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

&&

LAT...LON 2707 8066 2711 8067 2718 8075 2720 8080
      2720 8083 2742 8081 2739 8037 2695 8038
      2695 8061
TIME...MOT...LOC 2116Z 022DEG 19KT 2728 8052

$$


MOSES

3 follow-up statements

866 
WWUS52 KMLB 152157
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
557 PM EDT WED JUN 15 2011

FLC085-093-111-152215-
/O.CON.KMLB.SV.W.0064.000000T0000Z-110615T2215Z/
OKEECHOBEE-MARTIN-ST. LUCIE-
557 PM EDT WED JUN 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN ST. LUCIE...WESTERN MARTIN AND SOUTHEASTERN
OKEECHOBEE COUNTIES...

AT 556 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 8 MILES NORTH OF PORT MAYACA...MOVING SOUTHWEST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
INDIANTOWN...PORT MAYACA...STATE ROAD 710...AND TAYLOR CREEK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR EAST CENTRAL FLORIDA.

&&

LAT...LON 2707 8066 2711 8067 2718 8075 2720 8080
      2720 8083 2737 8081 2733 8068 2717 8038
      2695 8038 2695 8061
TIME...MOT...LOC 2157Z 025DEG 17KT 2710 8061

$$


MOSES

234 
WWUS52 KMLB 152206
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
606 PM EDT WED JUN 15 2011

FLC085-093-111-152215-
/O.CON.KMLB.SV.W.0064.000000T0000Z-110615T2215Z/
OKEECHOBEE-MARTIN-ST. LUCIE-
606 PM EDT WED JUN 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN ST. LUCIE...WESTERN MARTIN AND SOUTHEASTERN
OKEECHOBEE COUNTIES...

AT 600 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED 7 MILES NORTH OF PORT MAYACA...MOVING SOUTHWEST AT 20 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE INDIANTOWN...PORT 
MAYACA...STATE ROAD 710...US 441...AND TAYLOR CREEK. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF ON OR NEAR LAKE OKEECHOBEE...GET OUT OF THE WATER AND MOVE 
INDOORS OR INSIDE A VEHICLE. REMEMBER...LIGHTNING CAN STRIKE OUT TO 
15 MILES FROM THE PARENT THUNDERSTORM. IF YOU CAN HEAR THUNDER...YOU 
ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. MOVE TO SAFE SHELTER 
NOW. DON'T BE CAUGHT ON THE WATER IN A THUNDERSTORM!

GOLF BALL SIZED HAIL WAS REPORTED ALONG COUNTY HIGHWAY 713 NORTH OF 
INDIANTOWN WITH THIS STORM. IF YOU ARE IN THE PATH OF THE 
STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR EAST CENTRAL FLORIDA.

&&

LAT...LON 2707 8066 2711 8067 2718 8075 2720 8080
      2720 8083 2737 8081 2733 8068 2717 8038
      2695 8038 2695 8061
TIME...MOT...LOC 2203Z 025DEG 17KT 2707 8062

$$


MOSES

866 
WWUS52 KMLB 152215
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
615 PM EDT WED JUN 15 2011

FLC085-093-111-152225-
/O.EXP.KMLB.SV.W.0064.000000T0000Z-110615T2215Z/
OKEECHOBEE-MARTIN-ST. LUCIE-
615 PM EDT WED JUN 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ST. LUCIE...
WESTERN MARTIN AND SOUTHEASTERN OKEECHOBEE COUNTIES HAS EXPIRED...

THE SEVERE STORM THAT PROMPTED THE WARNING HAS WEAKENED...THUS THE 
WARNING HAS BEEN ALLOWED TO EXPIRE. WIND GUSTS UP TO 40 MPH AND PEA 
SIZED MAY STILL BE POSSIBLE IN THE PORT MAYACA AREA THROUGH 630 PM. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
WEDNESDAY EVENING FOR EAST CENTRAL FLORIDA.

LAT...LON 2707 8066 2711 8067 2718 8075 2720 8080
      2720 8083 2737 8081 2733 8068 2717 8038
      2695 8038 2695 8061
TIME...MOT...LOC 2215Z 025DEG 17KT 2702 8065

$$


MOSES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 9:26 PM EDT	Special Weather Statement	MLB	Orange	49 min
Jun 15, 2:14 PM EDT	Special Weather Statement	MLB	Lake	46 min
Jun 15, 2:18 PM EDT	Special Weather Statement	MLB	Seminole	42 min
Jun 15, 2:44 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange	46 min
Jun 15, 2:52 PM EDT	Special Weather Statement	MLB	Brevard	38 min
Jun 15, 3:08 PM EDT	Special Weather Statement	MLB	Orange	37 min
Jun 15, 3:15 PM EDT	Severe Thunderstorm Warning	MLB	Orange, Osceola	34 min
Jun 15, 3:29 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Orange, Osceola	61 min
Jun 15, 3:46 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Indian River	59 min
Jun 15, 4:34 PM EDT	Severe Thunderstorm Warning	MLB	Indian River, Okeechobee, Saint Lucie	56 min
Jun 15, 4:46 PM EDT	Severe Thunderstorm Warning	MLB	Brevard, Indian River, Okeechobee, Osceola	46 min
Jun 15, 5:34 PM EDT	Severe Thunderstorm Warning	MLB	Okeechobee	38 min
Jun 15, 6:18 PM EDT	Special Weather Statement	MLB	Martin	42 min
Jun 15, 7:13 PM EDT	Special Weather Statement	MLB	Lake	62 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.