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Excessive Heat Warning

National Weather Service Saint Louis MO
426 PM CDT Thu Jul 20 2017

...Dangerous Heat Wave Through At Least Saturday...

Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-
Callaway MO-Clinton IL-Cole MO-Fayette IL-Franklin MO-
Gasconade MO-Greene IL-Jersey IL-Knox MO-Lewis MO-Lincoln MO-
Macoupin IL-Marion IL-Marion MO-Moniteau MO-Monroe MO-
Montgomery IL-Montgomery MO-Osage MO-Pike IL-Pike MO-Ralls MO-
Shelby MO-Warren MO-Washington IL-
Including the cities of Bowling Green, Centralia, Columbia,
Fulton, Hannibal, Jefferson City, Litchfield, Mexico,
Mount Sterling, Pittsfield, Quincy, Salem, Sullivan, Union,
Vandalia, and Washington
426 PM CDT Thu Jul 20 2017


* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Up to 111 are expected due to temperatures
  around 102, and dewpoints in the lower 70s.

* IMPACTS...The combination of hot temperatures and high
  humidity will lead to an increased risk of heat-related stress
  and 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
  can reach lethal temperatures in a matter of minutes.


An Excessive Heat Warning means that a prolonged period of
dangerously hot temperatures and high humidity will occur. In
addition, nighttime conditions will remain warm and muggy
providing little chance for relief. This combination will create
a dangerous situation in which heat-related illnesses are likely,
especially for those living in un-air conditioned homes or
apartments. People in the Warning area are advised to avoid
poorly ventilated areas and prolonged work in the sun. Use air
conditioning in your house or apartment if it is working
correctly. If you do not have air conditioning, keep your house
or apartment well ventilated with fans, and try to spend some
time in an air conditioned environment to give your body a break
from the heat.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency, call 9-1-1 immediately.

Where`s baby? Look before you lock! 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



Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Saint Louis MO
331 AM CDT Thu Jul 20 2017

Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
331 AM CDT Thu Jul 20 2017

This hazardous weather outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Today and Tonight

A major heat wave is ongoing for portions of the area and
Excessive Heat Warnings and Heat Advisories remain in effect.
Please see these products for additional information.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday

A major heat wave will continue through at least Saturday. Heat
index values of 105 to upwards of 110 degrees are expected during
the afternoon and early evening hours each day. Please refer to the
Excessive Heat Warnings and Advisories for more information.

Isolated strong to severe thunderstorms are possible late Saturday
afternoon through Saturday night across portions of central and
east-central Missouri as well as west-central and southwest


Spotter activation is not anticipated through tonight.



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Silver Spring, MD 20910
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