Alert archive / Florida / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 101, NWS Miami, FL

June 24, 20126 counties in Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 24, 2012, 9:22 PM EDT for 6 counties in 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: Jun 24, 2012, 9:22 PM EDT (01:22 UTC)
Expired: Jun 24, 2012, 10:00 PM EDT
In force: 38 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

Counties Broward County, FL, Collier County, FL, Hendry County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL

The radar

The Miami radar (KAMX), 70 km from the middle of the area, began a volume at 01:23 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 24, 7:46 PM EDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 1.4 hours before the alert went out and 74 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: 2990 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 539 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 181 m²/s²
0-3 km storm-relative helicity: 225 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

960 
WUUS52 KMFL 250122
SVRMFL
FLC011-021-051-086-087-099-250200-
/O.NEW.KMFL.SV.W.0101.120625T0122Z-120625T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIAMI FL
922 PM EDT SUN JUN 24 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN BROWARD COUNTY IN SOUTH FLORIDA.
  NORTHWESTERN MIAMI-DADE COUNTY IN SOUTH FLORIDA.
  SOUTHWESTERN PALM BEACH COUNTY IN SOUTH FLORIDA.
  SOUTHEASTERN HENDRY COUNTY IN SOUTH FLORIDA.
  SOUTHEASTERN COLLIER COUNTY IN SOUTH FLORIDA.
  NORTHERN MAINLAND MONROE COUNTY IN SOUTH FLORIDA.

* UNTIL 1000 PM EDT

* AT 918 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 4 MILES NORTHEAST OF OCHOPEE TO 7 MILES SOUTH OF MONROE
  STATION TO 19 MILES SOUTH OF LOOP ROAD EE CENTER...AND MOVING
  NORTHEAST AT 50 MPH.

* THE LINE OF STORMS WILL AFFECT...
  MONROE STATION...
  LOOP ROAD EE CENTER...
  BIG CYPRESS NATIONAL PRESERVE...
  DADE-COLLIER TRAINING AIRPORT...
  FORTYMILE BEND...
  BIG CYPRESS SEMINOLE INDIAN RESERVATION...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MPH.
FREQUENT TO EXCESSIVE LIGHTNING AND HEAVY RAINFALL IS
ALSO POSSIBLE. IF THE STORM APPROACHES YOUR LOCATION, SEEK SHELTER IN
AN ENCLOSED BUILDING ON THE LOWEST FLOOR AND STAY AWAY FROM WINDOWS.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

&&

LAT...LON 2640 8114 2649 8086 2632 8063 2609 8057
      2543 8107 2555 8110 2554 8106 2555 8106
      2557 8110 2567 8112 2594 8143
TIME...MOT...LOC 0122Z 204DEG 44KT 2599 8124 2581 8106
          2552 8097

$$

BAXTER

3 follow-up statements

243 
WWUS52 KMFL 250135
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
935 PM EDT SUN JUN 24 2012

FLC086-087-250144-
/O.CAN.KMFL.SV.W.0101.000000T0000Z-120625T0200Z/
MAINLAND MONROE FL-MIAMI-DADE FL-
935 PM EDT SUN JUN 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MIAMI-DADE AND
NORTHERN MAINLAND MONROE COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT MONDAY MORNING FOR
MAINLAND MONROE COUNTY.

LAT...LON 2640 8114 2649 8086 2634 8069 2612 8075
      2598 8086 2598 8087 2596 8087 2580 8099
      2600 8139
TIME...MOT...LOC 0134Z 192DEG 49KT 2622 8128 2604 8111
          2587 8101

$$

FLC011-021-051-099-250200-
/O.CON.KMFL.SV.W.0101.000000T0000Z-120625T0200Z/
HENDRY FL-BROWARD FL-COLLIER FL-PALM BEACH FL-
935 PM EDT SUN JUN 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR SOUTHWESTERN PALM BEACH...SOUTHEASTERN COLLIER...WESTERN BROWARD
AND SOUTHEASTERN HENDRY COUNTIES...

AT 932 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM INTERSECTION ALLIGATOR ALLEY AND SR 839 TO BIG CYPRESS
NATIONAL PRESERVE TO OASIS RANGER STATION...MOVING NORTH TO NORTHEAST
AT 50 MPH.

THE SEVERE THUNDERSTORMS WILL BE NEAR...
OASIS RANGER STATION...
COLLIER COUNTY REST AREA ON ALLIGATOR ALLEY...
COLLIER/BROWARD LINE AND ALLIGATOR ALLEY...
BIG CYPRESS SEMINOLE INDIAN RESERVATION...
  AND SURROUNDING COMMUNITIES.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

LAT...LON 2640 8114 2649 8086 2634 8069 2612 8075
      2598 8086 2598 8087 2596 8087 2580 8099
      2600 8139
TIME...MOT...LOC 0134Z 192DEG 49KT 2622 8128 2604 8111
          2587 8101

$$

BAXTER

446 
WWUS52 KMFL 250148
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
948 PM EDT SUN JUN 24 2012

FLC011-099-250158-
/O.CAN.KMFL.SV.W.0101.000000T0000Z-120625T0200Z/
BROWARD FL-PALM BEACH FL-
948 PM EDT SUN JUN 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN PALM BEACH AND
WESTERN BROWARD COUNTIES IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT MONDAY MORNING FOR
SOUTHWESTERN FLORIDA.

LAT...LON 2636 8089 2612 8088 2600 8089 2599 8090
      2599 8089 2598 8092 2613 8130 2640 8114
      2648 8089
TIME...MOT...LOC 0148Z 192DEG 49KT 2640 8120 2624 8107
          2610 8096

$$

FLC021-051-250200-
/O.CON.KMFL.SV.W.0101.000000T0000Z-120625T0200Z/
HENDRY FL-COLLIER FL-
948 PM EDT SUN JUN 24 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR EAST CENTRAL COLLIER AND SOUTHEASTERN HENDRY COUNTIES...

AT 946 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 14 MILES NORTH OF BIG CYPRESS ACCESS AREAS OFF
ALLIGATOR ALLEY TO COLLIER COUNTY REST AREA ON ALLIGATOR ALLEY TO 8
MILES SOUTHEAST OF MILE MARKER 60 ON ALLIGATOR ALLEY...MOVING NORTH
AT 55 MPH.

THE SEVERE THUNDERSTORMS WILL BE NEAR...
MILE MARKER 60 ON ALLIGATOR ALLEY...
BIG CYPRESS SEMINOLE INDIAN RESERVATION...
  AND SURROUNDING COMMUNITIES.

SEVERE THUNDERSTORMS CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN AN INTERIOR
ROOM IN THE LOWEST FLOOR OF YOUR HOUSE OR BUSINESS IF A TORNADO IS
SPOTTED.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT MONDAY MORNING FOR
SOUTHWESTERN FLORIDA.

LAT...LON 2636 8089 2612 8088 2600 8089 2599 8090
      2599 8089 2598 8092 2613 8130 2640 8114
      2648 8089
TIME...MOT...LOC 0148Z 192DEG 49KT 2640 8120 2624 8107
          2610 8096

$$

BAXTER

866 
WWUS52 KMFL 250154
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
954 PM EDT SUN JUN 24 2012

FLC021-051-250203-
/O.EXP.KMFL.SV.W.0101.000000T0000Z-120625T0200Z/
HENDRY FL-COLLIER FL-
954 PM EDT SUN JUN 24 2012

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL COLLIER AND
SOUTHEASTERN HENDRY COUNTIES WILL EXPIRE AT 1000 PM EDT...

THE LINE OF THUNDERSTORMS HAVE WEAKENED BELOW SEVERE LIMITS. 
THEREFORE...THE SEVERE THUNDERSTORM WARNING WILL BE ALLOW TO EXPIRE. 
HOWEVER...THUNDERSTORMS REMAIN IN THE AREA WHICH CAN PRODUCE 
FREQUENT LIGHTNING...GUSTY WINDS TO 40 MPH...VERY HEAVY RAINFALL. 
STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA FOR THE LATEST 
UPDATES.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT MONDAY MORNING FOR
SOUTHWESTERN FLORIDA.

LAT...LON 2636 8089 2612 8088 2600 8089 2599 8090
      2599 8089 2598 8092 2613 8130 2640 8114
      2648 8089
TIME...MOT...LOC 0153Z 192DEG 49KT 2646 8115 2630 8103
          2616 8092

$$

BAXTER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 8:12 PM EDT	Special Weather Statement	MFL	Collier, Monroe	63 min
Jun 24, 8:40 PM EDT	Special Marine Warning	MFL		35 min
Jun 24, 8:43 PM EDT	Severe Thunderstorm Warning	MFL	Collier, Monroe	47 min
Jun 24, 9:05 PM EDT	Special Weather Statement	MFL	Collier, Hendry	40 min
Jun 24, 9:12 PM EDT	Severe Thunderstorm Warning	MFL	Collier, Glades, Hendry	63 min
Jun 24, 9:56 PM EDT	Special Marine Warning	MFL		94 min
Jun 24, 10:15 PM EDT	Special Weather Statement	MFL	Glades, Hendry	30 min
Jun 25, 2:17 AM EDT	Coastal Flood Statement	MFL	Collier	25 hr
Jun 25, 2:17 AM EDT	Rip Current Statement	MFL	Collier	66 hr
Jun 25, 8:16 AM EDT	Special Marine Warning	MFL		59 min
Jun 25, 8:56 AM EDT	Severe Thunderstorm Warning	MFL	Collier	49 min
Jun 25, 9:40 AM EDT	Special Weather Statement	MFL	Glades	35 min
Jun 25, 10:14 AM EDT	Special Weather Statement	MFL	Hendry	31 min

Nearby

Severe Thunderstorm Warnings in Florida, 2012 Every severe thunderstorm warning 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.