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Weather Advisories

Warning Description: Severe Thunderstorm Watch

Warning Date: 8:30 PM CDT on August 2, 2015

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Today's Extremes, Record High/Low Temperatures and Precipitation Totals
(updated every 10 minutes)
High Temperature 92.4F at 3:39pm
High Heat Index 102.1F at 5:26pm
Record High Temperature 101F in 1991
Low Temperature 69.0F at 3:56am
Low Wind Chill 69.0F at 3:56am
Record Low Temperature 51F in 1985
Peak Wind Gust 18mph at 5:04pm
Precipitation Today 0.00 inches
Precipitation This Month 0.00 inches
Total Precipitation This Year 26.38 inches
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Weather Information

The Illinois Emergency Management Agency (IEMA) provides a Severe Weather Preparedness
document with tips on staying safe during the severe weather months. Click here to view.

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Historical Joliet Weather

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Full Advisory Text

Warning Description: Severe Thunderstorm Watch

Warning Date: 8:30 PM CDT on August 2, 2015


Warning Message:The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of 
  eastern Iowa
  northern Illinois
  northern Indiana
  Southern Lower Michigan
  Northwest Ohio
  Lake Michigan
* effective this Sunday night and Monday morning from 830 PM
  until 200 am CDT.
* Primary threats include...
  scattered damaging winds likely with isolated significant gusts
    to 75 mph possible
  scattered large hail likely with isolated very large hail events
    to 2.5 inches in diameter possible
  a tornado or two possible
Summary...thunderstorms expected to increase in coverage and
strength along and ahead of se-moving cold front now over NE and E
central Iowa. At the same time...western end of lower mi squall line
expected to continue ESE. Supercells and bows within the squall
line...and more discrete supercells near the cold front...will have
the potential to produce large hail...a few swaths of damaging
wind...and possibly a tornado or two in watch area through early
The Severe Thunderstorm Watch area is approximately along and 175
statute miles east and west of a line from 40 miles northwest of
Benton Harbor Michigan to 25 miles southwest of Marseilles
Illinois.  For a complete depiction of the watch see the
associated watch outline update (wous64 kwns wou5).
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 462...ww 463...ww 464...
Aviation...a few severe thunderstorms with hail surface and aloft
to 2.5 inches. Extreme turbulence and surface wind gusts to 65
knots. A few cumulonimbi with maximum tops to 600. Mean storm
motion vector 30025.

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