Alert archive / Florida / Tornado Warnings in 2007

Tornado Warning 23, NWS Melbourne, FL

September 21, 2007Brevard County, Florida

NWS Melbourne, FL issued this tornado warning at Sep 21, 2007, 5:41 PM EDT for Brevard County, Florida. It was in force for 34 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
Sep 21, 2007, 5:41 PM EDT (21:41 UTC)
Expired
Sep 21, 2007, 6:15 PM EDT
In force
34 min
Issued by
NWS Melbourne, FL
Area
Counties, with a storm outline in the text

County Brevard County, FL

The radar

The Melbourne radar (KMLB), 72 km from the middle of the area, began a volume at 21:41 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

Cape Canaveral, FL (KXMR), launched 12:00Z, 9.7 hours before the alert went out and 49 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-pSkew-T log-p diagram, Cape Canaveral, FL at 12:00Z on 2007-09-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1276 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cape Canaveral, FL at 12:00Z on 2007-09-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1276 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
952 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
21 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.

000 
WFUS52 KMLB 212141
TORMLB
FLC009-212215-
/O.NEW.KMLB.TO.W.0023.070921T2141Z-070921T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
541 PM EDT FRI SEP 21 2007

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTHWESTERN BREVARD COUNTY IN EAST CENTRAL FLORIDA...

* UNTIL 615 PM EDT

* AT 536 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EXTREME
  NORTHWESTERN BREVARD COUNTY...OR ABOUT 9 MILES NORTHWEST OF MIMS. THIS
  STORM WAS NEARLY STATIONARY.

* THE TORNADO WILL BE NEAR...
  BUCK LAKE NOW
  RURAL NORTHWESTERN BREVARD COUNTY AT 620 PM EDT

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS 
THAT ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY BE ON 
THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY. 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.

EVACUATE MOBILE HOMES OR VEHICLES FOR MORE SUBSTANTIAL SHELTER. IF NO
SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS. ABANDON YOUR VEHICLE IF THE
TORNADO IS NEARBY.

LAT...LON 2879 8090 2862 8087 2859 8097 2878 8097
TIME...MOT...LOC 2141Z 231DEG 0KT 2867 8095

$$

MRV
1 follow-up statement
000 
WWUS52 KMLB 212156
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
555 PM EDT FRI SEP 21 2007

FLC009-212215-
/O.CON.KMLB.TO.W.0023.000000T0000Z-070921T2215Z/
BREVARD FL-
555 PM EDT FRI SEP 21 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR EXTREME
NORTHWESTERN BREVARD COUNTY...

AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED OVER EXTREME 
NORTHWESTERN BREVARD COUNTY...OR ABOUT 10 MILES NORTHWEST OF 
MIMS...OR NEAR BUCK LAKE. THIS STORM WAS NEARLY STATIONARY.

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 IS EXPECTED TO DEVELOP SHORTLY. 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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST
DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.

LAT...LON 2879 8090 2862 8087 2859 8097 2878 8097
TIME...MOT...LOC 2155Z 231DEG 0KT 2867 8095

$$

VOLKMER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 20, 9:22 PM EDTTornado WarningMLBLake23 min
Sep 20, 10:17 PM EDTTornado WarningMLBOrange33 min
Sep 20, 10:33 PM EDTTornado WarningMLBLake42 min
Sep 20, 11:09 PM EDTTornado WarningMLBLake66 min

Nearby

Tornado Warnings in Florida, 2007Every tornado warning in 2007Tornadoes in 2007

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.