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812 

WWUS20 KWNS 010059

SEL1

SPC WW 010059

FLZ000-CWZ000-010800-



URGENT - IMMEDIATE BROADCAST REQUESTED

Severe Thunderstorm Watch Number 21

NWS Storm Prediction Center Norman OK

800 PM EST Fri Jan 31 2020



The NWS Storm Prediction Center has issued a



* Severe Thunderstorm Watch for portions of

  South Florida

  Coastal Waters



* Effective this Friday night and Saturday morning from 800 PM

  until 300 AM EST.



* Primary threats include...

  Isolated damaging wind gusts to 70 mph possible

  A tornado or two possible



SUMMARY...A bowing complex of storms, and possibly some additional

strong/severe storms preceding it, will continue to spread

east-northeastward this evening toward the Florida Keys and other

parts of South Florida. Wind damage is the most likely risk, but a

tornado or two cannot be ruled out.



The severe thunderstorm watch area is approximately along and 65

statute miles north and south of a line from 50 miles northwest of

Key West FL to 30 miles southeast of Miami FL. For a complete

depiction of the watch see the associated watch outline update

(WOUS64 KWNS WOU1).



PRECAUTIONARY/PREPAREDNESS ACTIONS...



REMEMBER...A Severe Thunderstorm Watch means conditions are

favorable for 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. Severe thunderstorms can and occasionally do produce

tornadoes.



&&



AVIATION...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 500. Mean storm motion vector

25025.



...Guyer

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