Grand Tower, IL

4:14 PM CDT on July 21, 2017 (GMT -0500)
Cedar Lake Boat Launch | | Change Station
Active Advisory: Excessive Heat Warning

Elev 548 ft 37.67 °N, 89.27 °W | Updated 7 minutes ago

Clear
Clear
96.2 °F
Feels Like 112 °F
N
2.0
Wind Variable Wind from SW
Gusts 11.0 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.93 in
Visibility 10.0 miles
Clouds Few 5500 ft
Scattered Clouds 9000 ft
Heat Index 112 °F
Dew Point 77 °F
Humidity 55%
Rainfall 0.00 in
Snow Depth Not available.
5:53 AM 8:15 PM
Waning Crescent, 3% visible
METAR KMDH 212052Z VRB05KT 10SM FEW055 SCT090 33/26 A2994 RMK AO2 SLP133 T03330256 58018
Pressure 29.93 in
Visibility 10.0 miles
Clouds Few 5500 ft
Scattered Clouds 9000 ft
Heat Index 112 °F
Dew Point 77 °F
Humidity 55%
Rainfall 0.00 in
Snow Depth Not available.
5:53 AM 8:15 PM
Waning Crescent, 3% visible
METAR KMDH 212052Z VRB05KT 10SM FEW055 SCT090 33/26 A2994 RMK AO2 SLP133 T03330256 58018

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10-Day Weather Forecast

Almanac

Astronomy

Jul. 21, 2017 Rise Set
Actual Time
Civil Twilight
Nautical Twilight
Astronomical Twilight
Moon
Length of Visible Light
Length of Day
Tomorrow will be .
, % of the Moon is Illuminated

Today's Extremes

State Highs State Lows

Community

WunderPhotos

Category 6

Welcome to Category 6. This is the collective home for Weather Underground's featured writeups by Dr. Jeff Masters (right), Bob Henson (left), Chris Burt, and other regular contributors.

Nearby

Air Quality

  Air Quality AQ Index Pollutant
Not available.

Snow Depth

Station Depth Elevation

Earthquake Activity

City Distance Mag. Time & Date
Minimum magnitude displayed is 2.5.

Coastal Water Temperatures

Place Temperature

Stations

Nearby Weather Stations

Station Location Temp. Windchill Dew Point Humidity Wind Precip. Elev Updated Type
                   

Watches & Warnings

Excessive Heat Warning
Issued: 2:43 PM CDT Jul. 21, 2017 – National Weather Service

... Excessive heat warning now in effect until 7 PM CDT Sunday...
... Heat advisory is cancelled...

The National Weather Service in Paducah has cancelled the heat
advisory. An excessive heat warning has replaced the heat
advisory. This warning includes southern Illinois, southeast
Missouri, and extreme western Kentucky from Paducah west.

* Timing... through Sunday evening.

* Heat index values... peak heat indices will range from 110 to 115
degrees again on Saturday afternoon. On Sunday, heat indices
will peak between 100 and 110, depending on clouds and possible
thunderstorms. In addition, overnight lows will be only in the
mid 70s.

* Temperature... actual high temperatures will be in the mid 90s
Saturday, and the lower 90s Sunday.

* Impacts... the combination of hot temperatures and high
humidity will lead to an increased risk of heat-related
illness. The very Young, the elderly, those without air
conditioning, and those participating in strenuous outdoor
activities will be the most susceptible. Also, car interiors
will reach lethal temperatures in a matter of minutes.

Precautionary/preparedness actions...

Young children and pets should never be left unattended in
vehicles under any circumstances. This is especially true during
warm or hot weather when car interiors can reach lethal
temperatures in a matter of minutes.