Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Miami, FL

July 31, 2012Miami-Dade County, Florida

NWS Miami, FL issued this special weather statement at Jul 31, 2012, 3:22 PM EDT for Miami-Dade 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: Jul 31, 2012, 3:22 PM EDT (19:22 UTC)
Expired: Jul 31, 2012, 4:00 PM EDT
In force: 38 min
Issued by: NWS Miami, FL

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 34 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

Miami, FL (KMIA), launched 12:00Z, 7.4 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: 1762 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 748 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 16 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 31, 2:26 PM EDT, 56 minutes earlier.

Area forecast discussion, Jul 31, 2:26 PM EDT, 56 minutes before

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Hazardous weather outlook, Jul 31, 9:28 AM EDT, 5 hours 54 minutes before

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In the hours before

Special weather statement, Jul 31, 3:22 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
322 PM EDT TUE JUL 31 2012

FLZ071>074-173-312000-
COASTAL MIAMI DADE COUNTY FL INLAND BROWARD COUNTY FL INLAND
MIAMI-DADE COUNTY FL METRO BROWARD COUNTY FL METROPOLITAN MIAMI DADE
FL
322 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTH CENTRAL BROWARD COUNTY
  NORTH CENTRAL MIAMI-DADE COUNTY

* UNTIL 400 PM EDT

* AT 317 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  STRONG THUNDERSTORM NEAR SWEETWATER...AND MOVING NORTH AT 10 MPH.

* THE STORM WILL AFFECT...
  MIAMI INTERNATIONAL A/P...
  MIAMI SPRINGS...
  DORAL...
  HIALEAH...
  MEDLEY...
  PENNSUCO...
  AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 TO 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. 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 2607 8052 2605 8022 2568 8029 2569 8051
TIME...MOT...LOC 1922Z 182DEG 10KT 2579 8040

10

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 3:59 PM EDT	Special Weather Statement	MFL	Miami-Dade	46 min
Jul 31, 4:36 PM EDT	Areal Flood Advisory	MFL	Miami-Dade	101 min
Jul 31, 4:45 PM EDT	Special Weather Statement	MFL	Miami-Dade	30 min
Jul 31, 4:51 PM EDT	Special Weather Statement	MFL	Miami-Dade	24 min
Jul 31, 5:31 PM EDT	Special Weather Statement	MFL	Glades	44 min
Jul 31, 6:13 PM EDT	Severe Thunderstorm Warning	MFL	Glades	47 min
Jul 31, 6:39 PM EDT	Special Marine Warning	MFL		66 min
Jul 31, 7:15 PM EDT	Special Weather Statement	MFL	Palm Beach	45 min
Jul 31, 7:26 PM EDT	Severe Thunderstorm Warning	MFL	Palm Beach	49 min
Jul 31, 7:45 PM EDT	Special Marine Warning	MFL		60 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.