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WWUS20 KWNS 091606

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SPC WW 091606

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URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 481

NWS Storm Prediction Center Norman OK

1210 PM EDT Sat Sep 9 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  southern Florida

  Coastal Waters



* Effective this Saturday from 1210 PM until Midnight EDT.



* Primary threats include...

  A few tornadoes possible

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...As convection within outer bands of approaching Hurricane

Irma continues to move eastward across south Florida, risk for

tornadoes will gradually increase through this afternoon and evening

with embedded/stronger cells.



The tornado watch area is approximately along and 95 statute miles

east and west of a line from 80 miles northeast of Fort Myers FL to

40 miles southeast of Marathon FL. For a complete depiction of the

watch see the associated watch outline update (WOUS64 KWNS WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



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.



&&



AVIATION...Tornadoes and a few severe thunderstorms with hail

surface and aloft to 0.5 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean

storm motion vector 9045.



...Goss

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