SPC Severe Thunderstorm Watch 487

WW 487 SEVERE TSTM IA IL 060755Z - 061400Z

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 487
NWS Storm Prediction Center Norman OK
255 AM CDT Sun Sep 6 2020

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central and Eastern Iowa
  Northern Illinois

* Effective this Sunday morning from 255 AM until 900 AM 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...Multiple rounds of storms will persist overnight across
the region, with a more organized linear-type complex potentially
evolving through the early morning hours. Severe hail and locally
damaging wind will be possible as storms steadily progress
southeastward through the early morning hours.

The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 15 miles north of Fort
Dodge IA to 60 miles east of Moline IL. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU7).

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.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 486...

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 600. Mean storm motion vector
29035.

...Guyer

Read more

from SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0487.html