Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Miami, FL

July 11, 2012Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Jul 11, 2012, 5:20 AM EDT for Miami-Dade County, Florida. It was in force for 40 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 11, 2012, 5:20 AM EDT (09:20 UTC)
Expired: Jul 11, 2012, 6:00 AM EDT
In force: 40 min
Issued by: NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 12 km from the middle of the area, began a volume at 09:23 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 00:00Z, 9.3 hours before the alert went out and 16 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: 1235 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 965 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -36 m²/s²
0-3 km storm-relative helicity: -63 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 11, 3:56 AM EDT, 1 hour 24 minutes earlier.

Area forecast discussion, Jul 11, 3:56 AM EDT, 1 hour 24 minutes before

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Hazardous weather outlook, Jul 11, 3:54 AM EDT, 1 hour 26 minutes before

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In the hours before

Special weather statement, Jul 11, 2:55 AM EDT, 2 hours 25 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
255 AM EDT WED JUL 11 2012

FLZ073-074-173-110745-
COASTAL MIAMI DADE COUNTY FL INLAND MIAMI-DADE COUNTY FL METROPOLITAN
MIAMI DADE FL
255 AM EDT WED JUL 11 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL MIAMI-DADE COUNTY

* UNTIL 345 AM EDT

* AT 251 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  STRONG THUNDERSTORM NEAR PERRINE...AND MOVING WEST AT 10 MPH.

* THE STORM WILL AFFECT...
  PERRINE...
  PALMETTO BAY...
  KENDALL...
  WEST PERRINE...
  ZOO MIAMI...
  WEST KENDALL...
  AND SURROUNDING COMMUNITIES.

THE PRIMARY IMPACTS WILL BE GUSTY WINDS OF 45 TO 55 MPH. THESE WINDS
CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND UNSECURED
SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM
PASSES.

LAT...LON 2565 8026 2562 8028 2561 8030 2558 8030
      2558 8034 2559 8052 2571 8050 2579 8046
      2572 8031 2568 8025
TIME...MOT...LOC 0655Z 110DEG 9KT 2562 8030

60

Special weather statement, Jul 11, 5:20 AM 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 10, 9:18 PM EDT	Special Marine Warning	MFL		27 min
Jul 11, 2:51 AM EDT	Special Marine Warning	MFL		24 min
Jul 11, 2:55 AM EDT	Special Weather Statement	MFL	Miami-Dade	50 min
Jul 11, 4:51 AM EDT	Special Marine Warning	MFL		54 min
Jul 11, 5:46 AM EDT	Areal Flood Advisory	MFL	Miami-Dade	119 min
Jul 11, 5:56 AM EDT	Special Weather Statement	MFL	Miami-Dade	49 min
Jul 11, 6:32 AM EDT	Special Weather Statement	MFL	Broward	43 min
Jul 11, 8:35 AM EDT	Special Marine Warning	MFL		55 min
Jul 11, 9:42 AM EDT	Special Marine Warning	MFL		63 min

Nearby

Special Weather Statements in Florida, 2012 Every special weather statement in 2012

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.