Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Melbourne, FL

August 23, 2011Martin County, Okeechobee County, Florida

NWS Melbourne, FL issued this special weather statement at Aug 23, 2011, 3:21 PM EDT for Martin County, Okeechobee County, Florida. It was in force for 54 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: Aug 23, 2011, 3:21 PM EDT (19:21 UTC)
Expired: Aug 23, 2011, 4:15 PM EDT
In force: 54 min
Issued by: NWS Melbourne, FL

Counties Martin County, FL, Okeechobee County, FL

The radar

The Melbourne radar (KMLB), 92 km from the middle of the area, began a volume at 19:22 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, 7.4 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: 165 J/kg
Mixed-layer CIN: -98 J/kg
Mixed-layer LCL: 1320 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

873 
WWUS82 KMLB 231921
SPSMLB

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
321 PM EDT TUE AUG 23 2011

FLZ058-059-064-232015-
MARTIN-OKEECHOBEE-ST. LUCIE-
321 PM EDT TUE AUG 23 2011

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR STRONG WIND GUSTS
BETWEEN 45 AND 55 MPH OVER WESTERN MARTIN COUNTY...OKEECHOBEE
COUNTY...WESTERN ST. LUCIE COUNTY...

* UNTIL 415 PM EDT.

AT 318 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STORM CAPABLE OF PRODUCING STRONG WIND GUSTS 10 MILES NORTH OF 
INDIANTOWN...MOVING SOUTH AT 5 MPH. OTHER STRONG STORMS WILL 
CONTINUE TO DEVELOP OVER OKEECHOBEE COUNTY AND INTERIOR SAINT LUCIE 
COUNTY AS OUTFLOW BOUNDARIES PROPAGATE THROUGH THE AREA. MOVEMENT OF 
THESE STORMS WILL ALSO BE TOWARD THE SOUTH.

THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND
GUSTY WINDS OF 45 TO 55 MPH...WHICH CAN CAUSE UNSECURED OBJECTS TO
BLOW AROUND...SNAP TREE LIMBS OR CAUSE POWER OUTAGES. HEAVY RAINFALL
WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE
STORM PASSES.

LAT...LON 2710 8067 2716 8072 2720 8080 2715 8087
      2721 8097 2726 8101 2729 8100 2733 8105
      2736 8104 2738 8111 2758 8117 2764 8114
      2759 8078 2756 8077 2756 8055 2696 8028
      2695 8061
TIME...MOT...LOC 1920Z 350DEG 6KT 2716 8049

$$


KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 12:46 PM EDT	Special Marine Warning	MLB		119 min
Aug 23, 1:03 PM EDT	Special Weather Statement	MLB	Brevard	87 min
Aug 23, 2:19 PM EDT	Severe Thunderstorm Warning	MLB	Brevard	41 min
Aug 23, 2:26 PM EDT	Special Weather Statement	MLB	Indian River	64 min
Aug 23, 2:27 PM EDT	Areal Flood Advisory	MLB	Brevard	2 hr
Aug 23, 2:35 PM EDT	Special Weather Statement	MLB	Orange	55 min
Aug 23, 3:11 PM EDT	Severe Thunderstorm Warning	MLB	Lake, Orange, Seminole, Volusia	38 min
Aug 23, 3:27 PM EDT	Special Weather Statement	MLB	Brevard	48 min
Aug 23, 3:42 PM EDT	Areal Flood Advisory	MLB	Lake	2 hr
Aug 23, 3:57 PM EDT	Areal Flood Advisory	MLB	Martin	93 min
Aug 23, 4:03 PM EDT	Special Weather Statement	MLB	Lake	57 min
Aug 23, 4:30 PM EDT	Special Weather Statement	MLB	Lake	45 min
Aug 23, 4:38 PM EDT	Special Weather Statement	MLB	Okeechobee	52 min
Aug 23, 5:06 PM EDT	Tropical Storm Watch	MLB		39 hr
Aug 23, 6:29 PM EDT	Hurricane Local Statement	MLB	Volusia	68 hr

Nearby

Special Weather Statements in Florida, 2011 Every special weather statement 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.