Alert archive / Florida / Special Weather Statements in 2011

Special Weather Statement, NWS Miami, FL

July 17, 2011Broward County, Florida

NWS Miami, FL issued this special weather statement at Jul 17, 2011, 7:22 PM EDT for Broward County, Florida. It was in force for 23 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: Jul 17, 2011, 7:22 PM EDT (23:22 UTC)
Expired: Jul 17, 2011, 7:45 PM EDT
In force: 23 min
Issued by: NWS Miami, FL

County Broward County, FL

The radar

The Miami radar (KAMX), 37 km from the middle of the area, began a volume at 23:23 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.

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 11.4 hours before the alert went out and 10 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: 2171 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 749 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 1 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this special weather statement went out at Jul 17, 2:52 PM EDT, 4 hours 30 minutes earlier.

Area forecast discussion, Jul 17, 2:52 PM EDT, 4 hours 30 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MIAMI FL
252 PM EDT SUN JUL 17 2011

.DISCUSSION...

DEEP LAYER MOISTURE AND CONVECTION IS NOW TAKING PLACE FROM NEAR
SOUTHEASTERN LOUISIANA EASTWARD ACROSS THE FLORIDA PENINSULA AND
CONTINUING FURTHER EASTWARD TO THE BROAD LOW EAST OF CAPE
CANAVERAL. SHOWERS AND ISOLATED THUNDERSTORMS ARE JUST BEGINNING
ACROSS THE SOUTH FLORIDA PENINSULA. SCATTERED SHOWERS AND
THUNDERSTORMS ARE EXPECTED TO CONTINUE FORMING ACROSS THE REGION
THE REMAINDER OF THE AFTERNOON HOURS BEFORE TAPERING OFF DURING
THE EVENING...WITH ONLY ISOLATED ACTIVITY EXPECTED ACROSS THE
REGIONAL WATERS OVER NIGHT.

ALTHOUGH THE BROAD LOW CURRENTLY HAS LITTLE MOVEMENT...THE
GUIDANCE CONTINUES TO INDICATE A SLOW EASTWARD TO NORTHEASTWARD
DRIFT BEGINNING ON MONDAY...BUT THERE IS STILL A LOT OF UNCERTAINTY
IN THE MOVEMENT OF THIS BROAD LOW...WILL HAVE TO MONITOR IT CLOSELY.

ALTHOUGH THE AFOREMENTIONED BROAD LOW IS FORECAST TO SLOWLY DRIFT
NORTHEAST...THE BOUNDARY LAYER MOISTURE ACROSS THE ADJACENT GULF
AND ATLANTIC WATERS OFF THE FLORIA PENINSULA IS FORECAST TO SLOWLY
DRIFT SOUTHWARD MONDAY AND TUESDAY...MAINTAINING DEEPER LAYERED
MOISTURE ACROSS THE REGION WITH MAINLY AFTERNOON AND EVENING SCATTERED
SHOWERS AND THUNDERSTORMS EXPECTED ACROSS THE REGION. OTHER
SYNOPTIC FACTORS DO NOT SEEM FAVORABLE TO SUSTAIN MORE WIDESPREAD
CONVECTION SO JUST SCATTERED ACTIVITY IS EXPECTED.

&&

.MARINE...

A SMALL NORTHEAST SWELL IS EXPECTED TO LINGER THIS EVENING AND
TONIGHT ACROSS THE ATLANTIC WATERS...WITH MOST OF THE IMPACT
EAST OF PALM BEACH COUNTY. THIS SWELL IS FORECAST TO SLOWLY
DECREASE ON MONDAY.

&&

.FIRE WEATHER...

NO FIRE WEATHER CONCERNS.

&&

.PRELIMINARY POINT TEMPS/POPS...
WEST PALM BEACH  76  90  75  90 / 30 50 30 40
FORT LAUDERDALE  79  90  78  90 / 40 50 30 40
MIAMI            78  91  77  91 / 40 50 30 40
NAPLES           76  90  75  90 / 30 40 20 40

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...NONE.
AM...NONE.
GM...NONE.
&&

DISCUSSION/MARINE...60/BD
AVIATION/RADAR/FIRE...52/PS

Hazardous weather outlook, Jul 17, 6:58 PM EDT, 24 minutes before

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In the hours before

Special weather statement, Jul 17, 4:47 PM EDT, 2 hours 35 minutes before

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Special weather statement, Jul 17, 5:16 PM EDT, 2 hours 6 minutes before

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Special weather statement, Jul 17, 5:34 PM EDT, 1 hour 48 minutes before

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Special weather statement, Jul 17, 5:52 PM EDT, 1 hour 30 minutes before

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Special weather statement, Jul 17, 6:55 PM EDT, 27 minutes before

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Special weather statement, Jul 17, 7:22 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 3:21 PM EDT	Special Weather Statement	MFL	Collier	39 min
Jul 17, 3:30 PM EDT	Special Weather Statement	MFL	Miami-Dade	45 min
Jul 17, 4:00 PM EDT	Special Weather Statement	MFL	Collier	45 min
Jul 17, 4:13 PM EDT	Special Weather Statement	MFL	Monroe	47 min
Jul 17, 4:16 PM EDT	Special Weather Statement	MFL	Collier	44 min
Jul 17, 4:47 PM EDT	Special Weather Statement	MFL	Monroe	43 min
Jul 17, 5:16 PM EDT	Special Weather Statement	MFL	Miami-Dade	29 min
Jul 17, 5:24 PM EDT	Special Marine Warning	MFL		66 min
Jul 17, 5:34 PM EDT	Special Weather Statement	MFL	Miami-Dade	41 min
Jul 17, 5:52 PM EDT	Special Weather Statement	MFL	Miami-Dade	23 min
Jul 17, 6:03 PM EDT	Special Marine Warning	MFL		57 min
Jul 17, 6:55 PM EDT	Special Weather Statement	MFL	Broward	35 min
Jul 17, 7:15 PM EDT	Special Marine Warning	MFL		60 min
Jul 17, 7:56 PM EDT	Special Weather Statement	MFL	Broward	34 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.