

834 

WWUS20 KWNS 112140

SEL8

SPC WW 112140

MNZ000-NDZ000-120400-



URGENT - IMMEDIATE BROADCAST REQUESTED

Tornado Watch Number 408

NWS Storm Prediction Center Norman OK

440 PM CDT Tue Jul 11 2017



The NWS Storm Prediction Center has issued a



* Tornado Watch for portions of

  Northwestern Minnesota

  Eastern North Dakota



* Effective this Tuesday afternoon and evening from 440 PM until

  1100 PM CDT.



* Primary threats include...

  A couple tornadoes possible

  Scattered large hail likely with isolated very large hail events

    to 2.5 inches in diameter possible

  Scattered damaging wind gusts to 70 mph possible



SUMMARY...Thunderstorm development is expected from 5-7 pm CDT

across eastern North Dakota, and storms will subsequently spread to

the east-southeast into Minnesota.  Initial supercells will be

capable of producing a couple of tornadoes and isolated very large

hail, while storms could grow upscale into a small cluster or two

late this evening with an increase in the damaging wind threat.



The tornado watch area is approximately along and 65 statute miles

east and west of a line from 20 miles northwest of Hallock MN to 50

miles south southwest of Detroit Lakes MN. For a complete depiction

of the watch see the associated watch outline update (WOUS64 KWNS

WOU8).



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 2.5 inches. Extreme turbulence and surface wind

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

storm motion vector 29025.



...Thompson

