Tornado Watch 841

Issued

Aug 19, 2008, 7:05 AM EDT (11:05 UTC)

Expired

Aug 19, 2008, 4:00 PM EDT

In force

9 hr

Issued by

the Storm Prediction Center

Largest hail expected

0.5 in

Strongest gust expected

60 kt

The Melbourne radar (KMLB), 39 km from the middle of the area, began a volume at 11:07 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.

Two or more tornadoes

50%

One or more EF2 to EF5 tornadoes

20%

Ten or more severe wind reports

20%

One or more gusts of 65 knots or more

10%

Ten or more severe hail reports

5%

One or more hailstones of 2 inches or more

5%

Six or more combined severe hail and wind reports

50%

• Mesoscale Discussion 2118Aug 19, 3:37 AM EDT
• Mesoscale Discussion 2119Aug 19, 6:29 AM EDT
• Mesoscale Discussion 2120Aug 19, 11:32 AM EDT
• Mesoscale Discussion 2122Aug 19, 3:04 PM EDT

000
WWUS20 KWNS 191105
SEL1  
SPC WW 191105
FLZ000-CWZ000-192000-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 841
NWS STORM PREDICTION CENTER NORMAN OK
705 AM EDT TUE AUG 19 2008

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHERN AND EAST CENTRAL FLORIDA
       COASTAL WATERS

EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 705 AM UNTIL
400 PM EDT.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES EAST NORTHEAST OF
DAYTONA BEACH FLORIDA TO 65 MILES SOUTH SOUTHWEST OF WEST PALM
BEACH FLORIDA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 840. WATCH NUMBER 840 WILL NOT BE IN EFFECT AFTER
705 AM EDT. 

DISCUSSION...TROPICAL STORM FAY WILL CONTINUE TO MOVE NNEWD TOWARD
THE LAKE OKEECHOBEE AREA TODAY...AND THE EAST CENTRAL FL COAST
TONIGHT.  CONVECTIVE BANDS WILL SPREAD NWD ALONG THE FL E COAST AS
THE CYCLONE MOVES NNEWD...AND THE REGION OF STRONGER LOW-LEVEL SHEAR
AND TORNADO POTENTIAL WILL LIKEWISE SHIFT NWD ALONG THE COAST DURING
THE DAY.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
550. MEAN STORM MOTION VECTOR 17035.


...THOMPSON

Tornado Watches in Florida, 2008Every tornado watch in 2008

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.