SPC Severe Thunderstorm Watch 359



WW 359 SEVERE TSTM IA IL MN 151815Z – 160200Z

WW 0359 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 359
NWS Storm Prediction Center Norman OK
115 PM CDT Sat Jun 15 2019

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Iowa
  northwest Illinois
  southern Minnesota

* Effective this Saturday afternoon and evening from 115 PM until
  900 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Thunderstorms are currently increasing in coverage across
the region, and may be accompanied by a risk for severe hail and
strong wind gusts.  Eventually activity may consolidate into an
organizing cluster of storms, which may pose a more prominent risk
for strong wind gusts while advancing southeastward across Iowa
through early this evening.

The severe thunderstorm watch area is approximately along and 110
statute miles east and west of a line from 35 miles north of Spencer
IA to 25 miles east of Ottumwa IA. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU9).

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
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
31035.

...Kerr

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