Alert archive / Florida / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 65, NWS Melbourne, FL

June 15, 2011Okeechobee County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 15, 2011, 5:34 PM EDT for Okeechobee County, Florida. It was in force for 38 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 15, 2011, 5:34 PM EDT (21:34 UTC)
Expired: Jun 15, 2011, 6:12 PM EDT
In force: 38 min
Issued by: NWS Melbourne, FL
Area: Storm-based polygon

County Okeechobee County, FL

The radar

The Melbourne radar (KMLB), 93 km from the middle of the area, began a volume at 21:37 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
Jun 15, 1:52 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.6 hours before the alert went out and 135 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.

940 
WUUS52 KMLB 152134
SVRMLB
FLC093-152230-
/O.NEW.KMLB.SV.W.0065.110615T2134Z-110615T2230Z/

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OKEECHOBEE COUNTY IN FLORIDA

* UNTIL 630 PM EDT.

* AT 528 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 SOUTH OF FORT DRUM...AND MOVING SOUTH AT 5 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED       
  TO...TAYLOR CREEK...OKEECHOBEE...OKEE TANTIE STATE                 
   PARK...STATE ROAD 70...AND STATE ROAD 441.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL STORMS WILL MOVE INTO THE WARNING AREA IN THE NEXT 20 
MINUTES. 

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.

&&

LAT...LON 2725 8100 2729 8100 2731 8104 2733 8105
      2736 8104 2738 8106 2738 8111 2741 8114
      2763 8113 2764 8081 2742 8080 2718 8074
      2720 8080 2719 8083 2715 8086 2715 8088
TIME...MOT...LOC 2133Z 353DEG 6KT 2738 8085

$$


MOSES

1 follow-up statement

466 
WWUS52 KMLB 152212
SVSMLB

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

FLC093-152222-
/O.CAN.KMLB.SV.W.0065.000000T0000Z-110615T2230Z/
OKEECHOBEE-
612 PM EDT WED JUN 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR OKEECHOBEE COUNTY IS
CANCELLED...

THE SEVERE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND EXITED
THE WARNING AREA...THUS THE WARNING HAS BEEN CANCELLED.

LAT...LON 2725 8100 2729 8100 2731 8104 2733 8105
      2736 8104 2738 8106 2738 8111 2741 8114
      2763 8113 2764 8081 2742 8080 2718 8074
      2720 8080 2719 8083 2715 8086 2715 8088
TIME...MOT...LOC 2212Z 353DEG 6KT 2732 8084

$$


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, 5:20 PM EDT	Severe Thunderstorm Warning	MLB	Martin, Okeechobee, Saint Lucie	55 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.