* WHAT...Heat index values up to 105 expected.
* WHERE...Most of southern Illinois, as well as Gibson, Posey, and
Vanderburgh counties in southwest Indiana, and the Purchase Area
of western Kentucky.
* WHEN...From noon to 8 PM CDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
* WHAT...Temperatures as low as 33 will result in frost formation.
* WHERE...Portions of southern Illinois, western Kentucky, and
southeast Missouri.
* WHEN...Until 8 AM CDT this morning.
* IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive
outdoor plants may be killed if left uncovered.
* WHAT...A wintry mix of light precipitation, including snow and
freezing rain and drizzle, from later this morning into this
evening. Another round of light snow is possible late tonight. A
glaze of ice and minor snow accumulation is possible.
* WHERE...Portions of southwest Indiana, western Kentucky, and
southeast Missouri.
* WHEN...From 10 AM Today to 9 AM CST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions will likely impact the Thursday evening commute and
may also impact the Friday morning commute.
* WHAT...Visibility less than one quarter mile in dense fog.
* WHERE...Portions of southern Illinois and western Kentucky.
* WHEN...Until 7 AM CST Saturday.
* IMPACTS...Hazardous driving conditions due to low visibility.
* ADDITIONAL DETAILS...The dense fog advisory covers the Kentucky
Purchase and Lakes region and extends northeast into far
southern and southeast Illinois and northwest Kentucky.
* WHAT...Sub-freezing temperatures between 21 and 27 degrees
expected.
* WHERE...All of southern Illinois, southwest Indiana, western
Kentucky and southeast Missouri.
* WHEN...From 9 PM CDT this evening to 9 AM CDT Tuesday.
* IMPACTS...Frost and freeze conditions will kill crops, other
sensitive vegetation and possibly damage unprotected outdoor
plumbing.
* ADDITIONAL DETAILS...This hard freeze will bring an end to the
growing season.