Alert archive / Florida / Tornado Warnings in 2009
Tornado Warning 21, NWS Melbourne, FL
NWS Melbourne, FL issued this tornado warning at Jul 11, 2009, 6:45 PM EDT for Osceola County, Florida. It was in force for 35 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 11, 2009, 6:45 PM EDT (22:45 UTC)
- Expired
- Jul 11, 2009, 7:20 PM EDT
- In force
- 35 min
- Issued by
- NWS Melbourne, FL
- Area
- Storm-based polygon
County Osceola County, FL
The radar
The Melbourne radar (KMLB), 71 km from the middle of the area, began a volume at 22:47 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, 10.8 hours before the alert went out and 90 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.
- Mixed-layer CAPE
- 114 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- -4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS52 KMLB 112245 TORMLB FLC097-112330- /O.NEW.KMLB.TO.W.0021.090711T2245Z-090711T2330Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 645 PM EDT SAT JUL 11 2009 THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A * TORNADO WARNING FOR... NORTHWEST OSCEOLA COUNTY IN FLORIDA... THIS INCLUDES WEST LAKE TOHO... * UNTIL 730 PM EDT. * AT 645 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR WEST LAKE TOHO...MOVING EAST AT 5 MPH. * THE TORNADO WILL BE NEAR... WEST LAKE TOHO BY 655 PM EDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 2823 8130 2812 8137 2818 8146 2824 8143 TIME...MOT...LOC 2245Z 290DEG 4KT 2820 8142 $$ KELLY
2 follow-up statements
000 WWUS52 KMLB 112251 SVSMLB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 651 PM EDT SAT JUL 11 2009 FLC097-112330- /O.CON.KMLB.TO.W.0021.000000T0000Z-090711T2330Z/ OSCEOLA- 651 PM EDT SAT JUL 11 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM EDT FOR NORTHWEST OSCEOLA COUNTY... AT 650 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A TORNADO OVER WEST LAKE TOHO...MOVING EAST AT 5 MPH... APPROACHING THE EASTERN SHORE. THE TORNADO WILL BE OVER... RURAL NORTHWESTERN OSCEOLA COUNTY THROUGH 700 PM EDT. LAT...LON 2823 8130 2812 8137 2818 8146 2824 8143 TIME...MOT...LOC 2250Z 290DEG 4KT 2820 8140 $$ KELLY
000 WWUS52 KMLB 112320 SVSMLB SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 720 PM EDT SAT JUL 11 2009 FLC097-112329- /O.CAN.KMLB.TO.W.0021.000000T0000Z-090711T2330Z/ OSCEOLA- 720 PM EDT SAT JUL 11 2009 ...THE TORNADO WARNING FOR NORTHWEST OSCEOLA COUNTY IS CANCELLED... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THE SEVERE STORM AND TORNADO THAT PROMPTED THE WARNING HAD WEAKENED AND NO LONGER APPEARED CAPABLE OF PRODUCING TORNADOES OR OTHER SEVERE WEATHER...THUS THE WARNING HAS BEEN CANCELLED. HOWEVER...HEAVY RAIN AND DANGEROUS LIGHTNING STRIKES WILL CONTINUE TO BE POSSIBLE THROUGH 8 PM. LAT...LON 2823 8130 2812 8137 2818 8146 2824 8143 TIME...MOT...LOC 2319Z 290DEG 4KT 2819 8137 $$ KELLY
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 7:14 PM EDT | Areal Flood Advisory | MLB | Orange, Osceola | 2 hr |
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.