Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Miami, FL

December 11, 2012Hendry County, Florida

NWS Miami, FL issued this special weather statement at Dec 11, 2012, 6:29 AM EST for Hendry County, Florida. It was in force for 46 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: Dec 11, 2012, 6:29 AM EST (11:29 UTC)
Expired: Dec 11, 2012, 7:15 AM EST
In force: 46 min
Issued by: NWS Miami, FL

County Hendry County, FL

The radar

The Miami radar (KAMX), 114 km from the middle of the area, began a volume at 11:29 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, 11.5 hours before the alert went out and 104 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: 2247 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 560 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.0

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 Dec 11, 4:03 AM EST, 2 hours 26 minutes earlier.

Area forecast discussion, Dec 11, 4:03 AM EST, 2 hours 26 minutes before

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Hazardous weather outlook, Dec 11, 6:25 AM EST, 4 minutes before

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In the hours before

Special weather statement, Dec 11, 12:34 AM EST, 5 hours 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1234 AM EST TUE DEC 11 2012

FLZ069-070-075-110615-
COASTAL COLLIER COUNTY FL INLAND COLLIER COUNTY FL MAINLAND MONROE FL
1234 AM EST TUE DEC 11 2012

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR SOUTHEASTERN
COLLIER COUNTY...NORTHERN MAINLAND MONROE COUNTY...FOR GUSTY WINDS OF
45 TO 55 MPH...

* UNTIL 115 AM EST

* AT 1233 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  STRONG THUNDERSTORM NEAR OCHOPEE...AND MOVING EAST AT 30 MPH.

* THE STORM WILL AFFECT...
  MONROE STATION...
  BIG CYPRESS NATIONAL PRESERVE...
  OASIS RANGER STATION...
  LOOP ROAD EE CENTER...
  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 2616 8092 2569 8089 2568 8129 2570 8128
      2573 8122 2575 8124 2576 8126 2579 8128
      2580 8134 2581 8137 2582 8137 2585 8140
      2600 8142
TIME...MOT...LOC 0534Z 262DEG 27KT 2587 8128

CWC

Special weather statement, Dec 11, 1:12 AM EST, 5 hours 17 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
112 AM EST TUE DEC 11 2012

FLZ070-071-073-075-110700-
INLAND BROWARD COUNTY FL INLAND COLLIER COUNTY FL INLAND MIAMI-DADE
COUNTY FL MAINLAND MONROE FL
112 AM EST TUE DEC 11 2012

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR SOUTHWESTERN
BROWARD COUNTY...NORTHWESTERN MIAMI-DADE COUNTY...SOUTHEASTERN
COLLIER COUNTY...NORTHERN MAINLAND MONROE COUNTY...FOR THE PRIMARY
IMPACTS WILL BE UP TO NICKEL SIZED HAIL AND GUSTY WINDS OF 45 TO 55
MPH...

* UNTIL 200 AM EST

* AT 108 AM EST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  A LINE OF STRONG THUNDERSTORMS EXTENDING FROM 5 MILES NORTH OF BIG
  CYPRESS NATIONAL PRESERVE TO 4 MILES NORTH OF WILDERNESS
  WATERWAY NORTH...AND MOVING EAST AT 25 MPH.

* THE LINE OF STORMS WILL AFFECT...
  BIG CYPRESS NATIONAL PRESERVE...
  OASIS RANGER STATION...
  LOOP ROAD...
  LOOP ROAD EE CENTER...
  COLLIER/BROWARD LINE AND ALLIGATOR ALLEY...
  MICCOSUKEE SERVICE PLAZA...
  AND SURROUNDING COMMUNITIES.

THE PRIMARY IMPACTS WILL BE SMALL HAIL AND 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.

TORRENTIAL RAINFALL CAN BE EXPECTED...CAUSING TEMPORARY PONDING ON
SOME ROADS AND MINOR FLOODING OF POOR DRAINAGE AREAS. MOTORISTS
SHOULD SLOW DOWN IN HEAVY RAINFALL TO REDUCE THE RISK OF HYDROPLANING
AND LEAVE A SAFE DISTANCE BETWEEN OTHER VEHICLES.

LAT...LON 2620 8064 2568 8073 2565 8119 2615 8109
TIME...MOT...LOC 0612Z 260DEG 21KT 2609 8105 2571 8112

CWC

Special weather statement, Dec 11, 1:59 AM EST, 4 hours 30 minutes before

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Special weather statement, Dec 11, 2:09 AM EST, 4 hours 20 minutes before

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Special weather statement, Dec 11, 3:12 AM EST, 3 hours 17 minutes before

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Special weather statement, Dec 11, 6:29 AM EST, 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
Dec 10, 11:40 PM EST	Areal Flood Advisory	MFL	Collier	2 hr
Dec 10, 11:45 PM EST	Special Marine Warning	MFL		60 min
Dec 11, 12:02 AM EST	Special Weather Statement	MFL	Collier	43 min
Dec 11, 12:34 AM EST	Special Weather Statement	MFL	Collier	41 min
Dec 11, 1:12 AM EST	Special Weather Statement	MFL	Monroe	48 min
Dec 11, 1:31 AM EST	Severe Thunderstorm Warning	MFL	Broward, Collier, Miami-Dade, Monroe	29 min
Dec 11, 1:47 AM EST	Severe Thunderstorm Warning	MFL	Broward, Collier, Miami-Dade, Monroe	28 min
Dec 11, 1:59 AM EST	Special Weather Statement	MFL	Broward	31 min
Dec 11, 2:09 AM EST	Special Weather Statement	MFL	Miami-Dade	51 min
Dec 11, 3:12 AM EST	Special Weather Statement	MFL	Broward	48 min
Dec 11, 3:47 AM EST	Special Marine Warning	MFL		58 min
Dec 11, 4:52 AM EST	Areal Flood Advisory	MFL	Collier	113 min
Dec 11, 8:53 AM EST	Areal Flood Advisory	MFL	Collier	112 min
Dec 11, 9:13 AM EST	Special Marine Warning	MFL		32 min
Dec 11, 9:15 AM EST	Special Weather Statement	MFL	Collier	45 min
Dec 11, 9:40 AM EST	Special Marine Warning	MFL		95 min
Dec 11, 10:06 AM EST	Special Weather Statement	MFL	Collier	39 min
Dec 11, 6:08 PM EST	Areal Flood Advisory	MFL	Palm Beach	112 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.