Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Melbourne, FL

August 6, 2011Lake County, Orange County, Florida

NWS Melbourne, FL issued this special weather statement at Aug 6, 2011, 6:13 PM EDT for Lake County, Orange County, Florida. It was in force for 77 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 6, 2011, 6:13 PM EDT (22:13 UTC)
Expired: Aug 6, 2011, 7:30 PM EDT
In force: 77 min
Issued by: NWS Melbourne, FL

Counties Lake County, FL, Orange County, FL

The radar

The Melbourne radar (KMLB), 96 km from the middle of the area, began a volume at 22:14 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, 10.2 hours before the alert went out and 97 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: 1440 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 759 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 16 m²/s²
0-3 km storm-relative helicity: 18 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.

093 
WWUS82 KMLB 062213
SPSMLB

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
613 PM EDT SAT AUG 6 2011

FLZ041-044>046-053-144-062330-
INLAND VOLUSIA COUNTY-NORTHERN LAKE
COUNTY-ORANGE-OSCEOLA-SEMINOLE-SOUTHERN LAKE COUNTY-
613 PM EDT SAT AUG 6 2011

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR STRONG STORMS 
DEVELOPING OVER LAKE COUNTY...WESTERN ORANGE COUNTY...WESTERN 
OSCEOLA COUNTY...WESTERN SEMINOLE COUNTY...INTERIOR VOLUSIA COUNTY...

* UNTIL 730 PM EDT.

AT 605 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE 
EAST AND WEST COAST SEA BREEZE BOUNDARIES WILL COLLIDE IN THE NEXT 
HOUR OR SO WHICH SHOULD INCREASE THE COVERAGE AND INTENSITY OF 
STORMS ROUGHLY FROM LAKE GEORGE SOUTHWARD TO LAKE KISSIMMEE. 

THE PRIMARY THREAT WILL BE FREQUENT LIGHTNING STRIKES...FOLLOWED BY 
GUSTY DOWNBURST WINDS UP TO 50 MPH WHICH CAN CAUSE UNSECURED OBJECTS 
TO BLOW AROUND...AND HEAVY RAIN WHICH REDUCES VISIBILITY. IN 
ADDITION...CONDITIONS ARE FAVORABLE FOR THE DEVELOPMENT OF FUNNEL 
CLOUDS IN THE STRONGER STORMS. FUNNEL CLOUDS CAN OCCASIONALLY TOUCH 
DOWN AND PRODUCE SMALL...BRIEF TORNADOES. STORM MOVEMENT WILL BE 
SLOW AND ERRATIC.  

LAT...LON 2927 8141 2926 8135 2765 8113 2783 8122
      2786 8131 2806 8145 2802 8138 2808 8135
      2808 8145 2814 8153 2825 8156 2826 8166
      2834 8166 2835 8173 2897 8176 2896 8166
      2905 8164 2932 8168 2937 8150 2938 8142
TIME...MOT...LOC 2204Z 272DEG 4KT 2830 8163

$$


KELLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 8:38 PM EDT	Areal Flood Advisory	MLB	Lake	112 min

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.