Alert archive / Florida / Tornado Warnings in 2009

Tornado Warning 22, NWS Melbourne, FL

July 15, 2009Orange County, Seminole County, Florida

NWS Melbourne, FL issued this tornado warning at Jul 15, 2009, 7:48 PM EDT for Orange County, Seminole County, Florida. It was in force for 42 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 15, 2009, 7:48 PM EDT (23:48 UTC)
Expired
Jul 15, 2009, 8:30 PM EDT
In force
42 min
Issued by
NWS Melbourne, FL
Area
Storm-based polygon

Counties Orange County, FL, Seminole County, FL

The radar

The Melbourne radar (KMLB), 74 km from the middle of the area, began a volume at 23:49 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

Tampa Bay, FL (KTBW), launched 12:00Z, 11.8 hours before the alert went out and 154 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, Tampa Bay, FL at 12:00Z on 2009-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1005 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, Tampa Bay, FL at 12:00Z on 2009-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -5 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
1005 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
948 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-5 m²/s²
0-3 km storm-relative helicity
-14 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 152348
TORMLB
FLC095-117-160030-
/O.NEW.KMLB.TO.W.0022.090715T2348Z-090716T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
748 PM EDT WED JUL 15 2009

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL ORANGE COUNTY IN FLORIDA...
  THIS INCLUDES THE CITIES OF...CHRISTMAS...BITHLO...AZALEA PARK...
  SOUTH CENTRAL SEMINOLE COUNTY IN FLORIDA...
  THIS INCLUDES THE CITIES OF...OVIEDO...GOLDENROD...

* UNTIL 830 PM EDT.

* AT 748 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR UNION
  PARK...OR NEAR AZALEA PARK...MOVING NORTHEAST AT 10 MPH.

* THE TORNADO WILL BE NEAR...
  BITHLO AND OVIEDO BY 825 PM EDT...
  7 MILES NORTHWEST OF CHRISTMAS BY 830 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A STRONG BUILDING ON
THE LOWEST FLOOR...IN AN INTERIOR ROOM SUCH AS A BATHROOM OR CLOSET.
KEEP AWAY FROM WINDOWS. GET UNDER A WORKBENCH OR OTHER PIECE OF
STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.

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 2873 8122 2853 8095 2839 8121 2856 8135
TIME...MOT...LOC 2348Z 235DEG 8KT 2854 8121

$$
2 follow-up statements
000 
WWUS52 KMLB 160015
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
815 PM EDT WED JUL 15 2009

FLC095-117-160030-
/O.CON.KMLB.TO.W.0022.000000T0000Z-090716T0030Z/
ORANGE-SEMINOLE-
815 PM EDT WED JUL 15 2009

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM EDT FOR SOUTH
CENTRAL SEMINOLE AND CENTRAL ORANGE COUNTIES...

AT 810 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR UNIVERSITY PARK...
OR NEAR BITHLO...MOVING NORTHEAST AT 10 MPH.

THE TORNADO WILL BE NEAR...
  BITHLO...CHULUOTA...6 MILES SOUTHEAST OF OVIEDO AND 6 MILES WEST OF
  CHRISTMAS PARK BY 830 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING 
QUARTER SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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.

SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN INTERIOR
HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO COVER
YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

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

&&

LAT...LON 2873 8122 2853 8095 2839 8121 2856 8135
TIME...MOT...LOC 0014Z 235DEG 8KT 2857 8116

$$
000 
WWUS52 KMLB 160026
SVSMLB

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MELBOURNE FL
826 PM EDT WED JUL 15 2009

FLC095-117-160035-
/O.EXP.KMLB.TO.W.0022.000000T0000Z-090716T0030Z/
ORANGE-SEMINOLE-
826 PM EDT WED JUL 15 2009

...THE TORNADO WARNING FOR SOUTH CENTRAL SEMINOLE AND CENTRAL ORANGE 
COUNTIES WILL BE ALLOWED TO EXPIRE AT 830 PM EDT...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE STORM AND
TORNADO THAT PROMPTED THE WARNING NO LONGER APPEARED CAPABLE OF 
PRODUCING TORNADOES...THUS THE TORNADO WARNING HAS BEEN ALLOWED TO 
EXPIRE. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT 
FOR CENTRAL ORANGE...EASTERN SEMINOLE...AND SOUTH CENTRAL VOLUSIA 
COUNTY UNTIL 915 PM.


LAT...LON 2873 8122 2853 8095 2839 8121 2856 8135
TIME...MOT...LOC 0025Z 235DEG 8KT 2858 8114

$$



CRISTALDI

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 7:07 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola, Seminole53 min
Jul 15, 7:34 PM EDTAreal Flood AdvisoryMLBOrange, Osceola, Seminole86 min

Nearby

Tornado Warnings in Florida, 2009Every tornado warning in 2009Tornadoes in 2009

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.