

982 

WWUS20 KWNS 192006

SEL5

SPC WW 192006

IAZ000-MOZ000-200300-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 285

NWS Storm Prediction Center Norman OK

310 PM CDT Thu Jul 19 2018



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  East-central and Southeast Iowa

  Far Northeast Missouri



* Effective this Thursday afternoon and evening from 310 PM until

  1000 PM CDT.



* Primary threats include...

  A couple tornadoes possible

  Scattered large hail and isolated very large hail events to 2

    inches in diameter likely

  Isolated damaging wind gusts to 70 mph possible



SUMMARY...The air mass continues to steadily destabilize at mid

afternoon across southern into central Iowa where a moist

environment otherwise exists. Strong winds through a deep layer, in

conjunction with sufficiently strong low-level winds, would appear

to support a supercell-related tornado risk aside from severe

hail/wind potential.



The tornado watch area is approximately along and 60 statute miles

north and south of a line from 5 miles north of Des Moines IA to 50

miles east of Ottumwa IA. For a complete depiction of the watch see

the associated watch outline update (WOUS64 KWNS WOU5).



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.



&&



OTHER WATCH INFORMATION...CONTINUE...WW 283...WW 284...



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

surface and aloft to 2 inches. Extreme turbulence and surface wind

gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean

storm motion vector 27025.



...Guyer

