SPC Severe Thunderstorm Watch 348



WW 348 SEVERE TSTM IA IL MN WI 091605Z – 100000Z

WW 0348 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 348
NWS Storm Prediction Center Norman OK
1105 AM CDT Thu Jul 9 2020

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central and Eastern Iowa
  Northwest Illinois
  Southeast Minnesota
  Southwest Wisconsin

* Effective this Thursday morning and evening from 1105 AM until
  700 PM CDT.

* Primary threats include...
  Scattered damaging wind gusts to 70 mph possible
  Scattered large hail events to 1.5 inches in diameter possible
  A tornado or two possible

SUMMARY...A remnant MCV (mesoscale convective vortex) will continue
to contribute to severe thunderstorm development initially across
northern Iowa into southeast Minnesota. Over time, additional storms
should develop across broader portions of eastern Iowa. Damaging
winds should be the primary hazard, but some severe hail may occur,
and a tornado cannot be entirely ruled out.

The severe thunderstorm watch area is approximately along and 110
statute miles north and south of a line from 50 miles west southwest
of Waterloo IA to 25 miles east southeast of Dubuque IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU8).

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
1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
25025.

...Guyer

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