Alert archive / Florida / Tornado Warnings in 2008

Tornado Warning 70, NWS Miami, FL

August 31, 2008Collier County, Miami-Dade County, Florida

NWS Miami, FL issued this tornado warning at Aug 31, 2008, 7:55 AM EDT for Collier County, Miami-Dade County, Florida. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 31, 2008, 7:55 AM EDT (11:55 UTC)
Expired: Aug 31, 2008, 9:00 AM EDT
In force: 65 min
Issued by: NWS Miami, FL
Area: Storm-based polygon

Counties Collier County, FL, Miami-Dade County, FL

The radar

The Miami radar (KAMX), 68 km from the middle of the area, began a volume at 11:58 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.

What was reported inside it

Time	Report	Where	Remark
Aug 31, 8:00 AM EDT	TORNADO	29 W Sweetwater, FL	PUBLIC DRIVING WEST OF U.S. 41 REPORTED OBSERVING A TORNADO NEAR 40 MILE BEND.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 11.9 hours before the alert went out and 72 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: 3266 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 627 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 131 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 9.3

Open this sounding in Storm Lab

The text

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

000 
WFUS52 KMFL 311155
TORMFL
FLC021-086-311300-
/O.NEW.KMFL.TO.W.0070.080831T1155Z-080831T1300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
755 AM EDT SUN AUG 31 2008

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN MIAMI-DADE COUNTY IN SOUTH FLORIDA.
  SOUTHEASTERN COLLIER COUNTY IN SOUTH FLORIDA.

* UNTIL 900 AM EDT

* AT 753 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR FORTYMILE
  BEND...MOVING NORTHWEST AT 32 MPH.

  THIS STORM IS ALSO CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
  60 MPH.

* THE TORNADO WILL BE NEAR...
  FORTYMILE BEND...
  DADE-COLLIER TRAINING AIRPORT...
  BIG CYPRESS NATIONAL PRESERVE...
  MILE MARKER 60 ON ALLIGATOR ALLEY...
  AND SURROUNDING COMMUNITIES.

IF YOU ARE NEAR THE PATH OF A TORNADO...SEEK SHELTER IN A STURDY
BUILDING ON THE LOWEST FLOOR...AWAY FROM OUTSIDE WALLS AND WINDOWS.
GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND STAY AWAY FROM WINDOWS.

LAT...LON 2612 8141 2625 8105 2573 8071 2570 8078
      2576 8088 2580 8088 2580 8093
TIME...MOT...LOC 1155Z 143DEG 28KT 2575 8077

$$

GR

1 follow-up statement

000
WWUS52 KMFL 311214
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
814 AM EDT SUN AUG 31 2008

FLC021-086-311300-
/O.CON.KMFL.TO.W.0070.000000T0000Z-080831T1300Z/
COLLIER FL-MIAMI-DADE FL-
813 AM EDT SUN AUG 31 2008

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 900 AM EDT FOR
NORTHWESTERN MIAMI-DADE AND SOUTHEASTERN COLLIER COUNTIES...

AT 811 AM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
FEW SEVERE THUNDERSTORMS CAPABLE OF PRODUCING A TORNADO. DAMAGING 
WINDS IN EXCESS OF 60 MPH ARE ALSO POSSIBLE. ONE STORM WAS LOCATED 
NEAR DADE-COLLIER TRAINING AIRPORT AND THE OTHER NEAR BIG CYPRESS 
NATIONAL PRESERVE...MOVING NORTHWEST AT 32 MPH.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS 
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY 
ALREADY BE ON THE GROUND...OR COULD POSSIBLY DEVELOP ANYTIME. IF YOU 
ARE IN THE PATH OF THIS DANGEROUS STORM...MOVE INDOORS AND TO THE 
LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM WINDOWS. IF DRIVING...DO
NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

REPORT SEVERE WEATHER OR DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY
OR YOUR COUNTY EMERGENCY MANAGEMENT. THEY WILL RELAY YOUR REPORT TO
THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI. OR YOU CAN
ALSO CALL THE NATIONAL WEATHER SERVICE IN MIAMI DIRECTLY AT
305.229.4528 TO REPORT SEVERE WEATHER.

LAT...LON 2612 8141 2625 8105 2573 8071 2570 8078
      2576 8088 2580 8088 2580 8093
TIME...MOT...LOC 1213Z 143DEG 28KT 2586 8086

$$

GR

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 30, 8:08 PM EDT	Special Weather Statement	MFL	Collier	37 min
Aug 30, 8:35 PM EDT	Special Marine Warning	MFL		25 min
Aug 30, 8:39 PM EDT	Special Weather Statement	MFL	Palm Beach	36 min
Aug 30, 8:45 PM EDT	Special Marine Warning	MFL		60 min
Aug 30, 10:37 PM EDT	Special Marine Warning	MFL		53 min
Aug 31, 5:25 AM EDT	High Surf Advisory	MFL	Collier	35 hr
Aug 31, 6:14 AM EDT	Tornado Warning	MFL	Collier	61 min
Aug 31, 6:37 AM EDT	Special Weather Statement	MFL	Monroe	23 min
Aug 31, 7:12 AM EDT	Tornado Warning	MFL	Collier	63 min
Aug 31, 7:16 AM EDT	Special Weather Statement	MFL	Collier	74 min
Aug 31, 9:01 AM EDT	Special Weather Statement	MFL	Collier	59 min
Aug 31, 7:56 PM EDT	Special Marine Warning	MFL		64 min

Nearby

Tornado Warnings in Florida, 2008 Every tornado warning in 2008 Tornadoes in 2008

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.