

849 

WWUS20 KWNS 061953

SEL1

SPC WW 061953

IAZ000-070400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 61

NWS Storm Prediction Center Norman OK

155 PM CST Mon Mar 6 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Much of Iowa



* Effective this Monday afternoon and evening from 155 PM until

  1000 PM CST.



* Primary threats include...

  A few tornadoes and a couple intense tornadoes possible

  Scattered damaging wind gusts to 70 mph likely

  Scattered large hail and isolated very large hail events to 2

    inches in diameter possible



SUMMARY...Clusters of thunderstorms will rapidly progress

east-northeast from the Missouri towards the Mississippi river

during the evening. This activity will likely form into an extensive

line of storms with all severe hazards possible, but damaging winds

as the main risk.



The tornado watch area is approximately along and 90 statute miles

east and west of a line from 25 miles north of Mason City IA to 50

miles south southwest of Knoxville IA. 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 2 inches. Extreme turbulence and surface wind

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

storm motion vector 24045.



...Grams

