Heat Advisory 3, NWS St. Louis, MO

528 
WWUS73 KLSX 190934
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
434 AM CDT Wed Jul 19 2017

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

ILZ100>102-MOZ061-063>065-192245-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Jefferson MO-Madison IL-Monroe IL-Saint Charles MO-Saint Clair IL-
Saint Louis City MO-Saint Louis MO-
Including the cities of Alton, Belleville, Cahokia, Edwardsville,
Saint Charles, and Saint Louis
434 AM CDT Wed Jul 19 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...105-112 each afternoon due to high 
  temperatures around 105, and dewpoints in mid 60s to 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

People in the Saint Louis Metropolitan Area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United Way of Greater Saint Louis
at 800-427-4626, or if calling from a land line phone dial 2-1-1.
You can also call Cool Down Saint Louis at 314-241-7668.

&&

$$

MOZ026-027-034>036-041-042-047>052-059-060-062-192245-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Audrain MO-Boone MO-Callaway MO-Cole MO-Franklin MO-Gasconade MO-
Lincoln MO-Marion MO-Moniteau MO-Monroe MO-Montgomery MO-Osage MO-
Pike MO-Ralls MO-Shelby MO-Warren MO-
Including the cities of Bowling Green, Columbia, Fulton, 
Hannibal, Jefferson City, Mexico, Sullivan, Union, and Washington
434 AM CDT Wed Jul 19 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Around 105 each afternoon due to high
  temperatures around 100, and dewpoints in the upper 60s to 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ058>060-064-065-069-070-074-095>099-MOZ018-019-192245-
/O.CON.KLSX.EH.W.0001.170719T1700Z-170723T0100Z/
Adams IL-Bond IL-Brown IL-Calhoun IL-Clinton IL-Fayette IL-
Greene IL-Jersey IL-Knox MO-Lewis MO-Macoupin IL-Marion IL-
Montgomery IL-Pike IL-Washington IL-
Including the cities of Centralia, Litchfield, Mount Sterling, 
Pittsfield, Quincy, Salem, and Vandalia
434 AM CDT Wed Jul 19 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT FROM NOON TODAY TO
8 PM CDT SATURDAY...

* TIMING...This afternoon through Saturday evening.

* HEAT INDEX VALUES...105-110 each afternoon due to high
  temperatures around 100, and dewpoints in the upper 60s to 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ079-MOZ072>075-084-085-099-192245-
/O.CON.KLSX.HT.Y.0003.170719T1700Z-170724T0100Z/
Crawford MO-Iron MO-Madison MO-Randolph IL-Reynolds MO-
Saint Francois MO-Sainte Genevieve MO-Washington MO-
Including the cities of Chester, Farmington, and Sparta
434 AM CDT Wed Jul 19 2017

...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 8 PM CDT
SUNDAY...

* TIMING...This afternoon through Sunday evening.

* HEAT INDEX VALUES...100-105 each afternoon due to high
  temperatures in the upper 90s, and dewpoints in the mid 60s to around
  70.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Heat Advisory means that a period of hot temperatures and high
humidity will occur. This combination will create a situation in
which heat-related illnesses are possible, especially for those
living in un-air conditioned homes or apartments. People in the
Advisory area are advised to avoid poorly ventilated areas and
prolonged work in the sun. Also, keep plenty of liquids on hand
and try to stay in an air conditioned environment.

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
minutes.

&&

$$

Gosselin

969 
WWUS73 KLSX 192036
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
336 PM CDT Wed Jul 19 2017

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

ILZ100>102-MOZ061-063>065-200845-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Jefferson MO-Madison IL-Monroe IL-Saint Charles MO-Saint Clair IL-
Saint Louis City MO-Saint Louis MO-
Including the cities of Alton, Belleville, Cahokia, Edwardsville,
Saint Charles, and Saint Louis
336 PM CDT Wed Jul 19 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...105 to upwards of 110 degrees due to
  temperatures of 100 to 107, and dewpoints in the upper 60s and 
  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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

People in the Saint Louis Metropolitan Area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United Way of Greater Saint Louis
at 800-427-4626, or if calling from a land line phone dial 2-1-1.
You can also call Cool Down Saint Louis at 314-241-7668.

&&

$$

ILZ058>060-064-065-069-070-074-095>099-MOZ018-019-026-027-034>036-
041-042-047>052-059-060-062-200845-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
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
336 PM CDT Wed Jul 19 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...100 to 110 due to temperatures around 100, 
  and dewpoints in the upper 60s and 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ079-MOZ072>075-084-085-099-200845-
/O.CON.KLSX.HT.Y.0003.000000T0000Z-170724T0100Z/
Crawford MO-Iron MO-Madison MO-Randolph IL-Reynolds MO-
Saint Francois MO-Sainte Genevieve MO-Washington MO-
Including the cities of Chester, Farmington, and Sparta
336 PM CDT Wed Jul 19 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT SUNDAY...

* TIMING...Through Sunday evening.

* HEAT INDEX VALUES...100 to 105 due to temperatures around 100, 
  and dewpoints in the upper 60s.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Heat Advisory means that a period of hot temperatures and high
humidity will occur. This combination will create a situation in
which heat-related illnesses are possible, especially for those
living in un-air conditioned homes or apartments. People in the
Advisory area are advised to avoid poorly ventilated areas and
prolonged work in the sun. Also, keep plenty of liquids on hand
and try to stay in an air conditioned environment.

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
minutes.

&&

$$

KD

930 
WWUS73 KLSX 200838
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
338 AM CDT Thu Jul 20 2017

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

ILZ100>102-MOZ061-063>065-202045-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Jefferson MO-Madison IL-Monroe IL-Saint Charles MO-Saint Clair IL-
Saint Louis City MO-Saint Louis MO-
Including the cities of Alton, Belleville, Cahokia, Edwardsville,
Saint Charles, and Saint Louis
338 AM CDT Thu Jul 20 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...105-112 each afternoon due to high
  temperatures of 100-105, and dewpoints in the low 60s to near 70.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

People in the Saint Louis Metropolitan Area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United Way of Greater Saint Louis
at 800-427-4626, or if calling from a land line phone dial 2-1-1.
You can also call Cool Down Saint Louis at 314-241-7668.

&&

$$

ILZ058>060-064-065-069-070-074-095>099-MOZ018-019-026-027-034>036-
041-042-047>052-059-060-062-202045-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
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
338 AM CDT Thu Jul 20 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...105-110 each afternoon due to high
  temperatures around around 100, and dewpoints in the upper 60s
  to 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ079-MOZ072>075-084-085-099-202045-
/O.CON.KLSX.HT.Y.0003.000000T0000Z-170724T0100Z/
Crawford MO-Iron MO-Madison MO-Randolph IL-Reynolds MO-
Saint Francois MO-Sainte Genevieve MO-Washington MO-
Including the cities of Chester, Farmington, and Sparta
338 AM CDT Thu Jul 20 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT SUNDAY...

* TIMING...Through Sunday evening.

* HEAT INDEX VALUES...Around 105 each afternoon due to high
  temperatures around in the upper 90s to low 100s, and dewpoints
  in the mid 60s to near 70.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Heat Advisory means that a period of hot temperatures and high
humidity will occur. This combination will create a situation in
which heat-related illnesses are possible, especially for those
living in un-air conditioned homes or apartments. People in the
Advisory area are advised to avoid poorly ventilated areas and
prolonged work in the sun. Also, keep plenty of liquids on hand
and try to stay in an air conditioned environment.

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
minutes.

&&

$$

Gosselin

175 
WWUS73 KLSX 202126
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
426 PM CDT Thu Jul 20 2017

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

ILZ100>102-MOZ061-063>065-211030-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Jefferson MO-Madison IL-Monroe IL-Saint Charles MO-Saint Clair IL-
Saint Louis City MO-Saint Louis MO-
Including the cities of Alton, Belleville, Cahokia, Edwardsville,
Saint Charles, and Saint Louis
426 PM CDT Thu Jul 20 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Up to 113 are expected due to temperatures 
  around 107, 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

People in the Saint Louis Metropolitan Area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United Way of Greater Saint Louis
at 800-427-4626, or if calling from a land line phone dial 2-1-1.
You can also call Cool Down Saint Louis at 314-241-7668.

&&

$$

ILZ058>060-064-065-069-070-074-095>099-MOZ018-019-026-027-034>036-
041-042-047>052-059-060-062-211030-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
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

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ079-MOZ072>075-084-085-099-211030-
/O.CON.KLSX.HT.Y.0003.000000T0000Z-170724T0100Z/
Crawford MO-Iron MO-Madison MO-Randolph IL-Reynolds MO-
Saint Francois MO-Sainte Genevieve MO-Washington MO-
Including the cities of Chester, Farmington, and Sparta
426 PM CDT Thu Jul 20 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT SUNDAY...

* TIMING...Through Sunday evening.

* HEAT INDEX VALUES...Up to 108 are expected due to temperatures 
  around 101, 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Heat Advisory means that a period of hot temperatures and high
humidity will occur. This combination will create a situation in
which heat-related illnesses are possible, especially for those
living in un-air conditioned homes or apartments. People in the
Advisory area are advised to avoid poorly ventilated areas and
prolonged work in the sun. Also, keep plenty of liquids on hand
and try to stay in an air conditioned environment.

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
minutes.

&&

$$

Carney

386 
WWUS73 KLSX 210940
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
440 AM CDT Fri Jul 21 2017

...Dangerous Heat Wave Through the Weekend...

ILZ100>102-MOZ061-063>065-212200-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Jefferson MO-Madison IL-Monroe IL-Saint Charles MO-Saint Clair IL-
Saint Louis City MO-Saint Louis MO-
Including the cities of Alton, Belleville, Cahokia, Edwardsville,
Saint Charles, and Saint Louis
440 AM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Between 110 and 115 each afternoon and 
  early evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

People in the Saint Louis Metropolitan Area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United Way of Greater Saint Louis
at 800-427-4626, or if calling from a land line phone dial 2-1-1.
You can also call Cool Down Saint Louis at 314-241-7668.

&&

$$

ILZ058>060-064-065-069-070-074-095>099-MOZ018-019-026-027-034>036-
041-042-047>052-059-060-062-212200-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
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
440 AM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Between 105 and 115 each afternoon and 
  early evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ079-MOZ072>075-084-085-099-212200-
/O.CON.KLSX.HT.Y.0003.000000T0000Z-170724T0100Z/
Crawford MO-Iron MO-Madison MO-Randolph IL-Reynolds MO-
Saint Francois MO-Sainte Genevieve MO-Washington MO-
Including the cities of Chester, Farmington, and Sparta
440 AM CDT Fri Jul 21 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT SUNDAY...

* TIMING...Through Sunday evening.

* HEAT INDEX VALUES...Around 105 each afternoon and early 
  evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Heat Advisory means that a period of hot temperatures and high
humidity will occur. This combination will create a situation in
which heat-related illnesses are possible, especially for those
living in un-air conditioned homes or apartments. People in the
Advisory area are advised to avoid poorly ventilated areas and
prolonged work in the sun. Also, keep plenty of liquids on hand
and try to stay in an air conditioned environment.

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
minutes.

&&

$$

TES

507 
WWUS73 KLSX 212030
NPWLSX

URGENT - WEATHER MESSAGE
National Weather Service Saint Louis MO
330 PM CDT Fri Jul 21 2017

...Dangerous Heat Wave Through the Weekend...

ILZ079-MOZ072>075-084-085-099-221200-
/O.UPG.KLSX.HT.Y.0003.000000T0000Z-170724T0100Z/
/O.EXB.KLSX.EH.W.0001.000000T0000Z-170724T0100Z/
Crawford MO-Iron MO-Madison MO-Randolph IL-Reynolds MO-
Saint Francois MO-Sainte Genevieve MO-Washington MO-
Including the cities of Chester, Farmington, and Sparta
330 PM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 8 PM CDT SUNDAY...

The National Weather Service in Saint Louis has issued an
Excessive Heat Warning, which is in effect until 8 PM CDT Sunday.
The Heat Advisory is no longer in effect.

* TIMING...Through Sunday evening.

* HEAT INDEX VALUES...Up to 110 due to temperatures around 101,
  and dewpoints in the low to middle 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to the early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

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
minutes.

&&

$$

ILZ100>102-MOZ061-063>065-221200-
/O.EXT.KLSX.EH.W.0001.000000T0000Z-170724T0100Z/
Jefferson MO-Madison IL-Monroe IL-Saint Charles MO-Saint Clair IL-
Saint Louis City MO-Saint Louis MO-
Including the cities of Alton, Belleville, Cahokia, Edwardsville,
Saint Charles, and Saint Louis
330 PM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 8 PM CDT SUNDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Between 110 and 115 each afternoon and early
  evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

People in the Saint Louis Metropolitan Area can get information
about cooling centers or energy assistance related to the
excessive heat by calling the United Way of Greater Saint Louis
at 800-427-4626, or if calling from a land line phone dial 2-1-1.
You can also call Cool Down Saint Louis at 314-241-7668.

&&

$$

ILZ069-070-074-MOZ059-062-221200-
/O.EXT.KLSX.EH.W.0001.000000T0000Z-170724T0100Z/
Clinton IL-Franklin MO-Gasconade MO-Marion IL-Washington IL-
Including the cities of Centralia, Salem, Sullivan, Union, 
and Washington
330 PM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 8 PM CDT SUNDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Between 105 and 115 each afternoon and 
  early evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

ILZ058>060-064-065-095>099-MOZ018-019-026-027-034>036-041-042-
047>052-060-221200-
/O.CON.KLSX.EH.W.0001.000000T0000Z-170723T0100Z/
Adams IL-Audrain MO-Bond IL-Boone MO-Brown IL-Calhoun IL-
Callaway MO-Cole MO-Fayette IL-Greene IL-Jersey IL-Knox MO-
Lewis MO-Lincoln MO-Macoupin IL-Marion MO-Moniteau MO-Monroe MO-
Montgomery IL-Montgomery MO-Osage MO-Pike IL-Pike MO-Ralls MO-
Shelby MO-Warren MO-
Including the cities of Bowling Green, Columbia, Fulton, 
Hannibal, Jefferson City, Litchfield, Mexico, Mount Sterling, 
Pittsfield, Quincy, and Vandalia
330 PM CDT Fri Jul 21 2017

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT
SATURDAY...

* TIMING...Through Saturday evening.

* HEAT INDEX VALUES...Between 105 and 115 each afternoon and 
  early evening.

* 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.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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
minutes.

&&

$$

Tilly

Area Forecast Discussion
National Weather Service Saint Louis MO
255 PM CDT Tue Jul 18 2017

.SHORT TERM...  (Through Late Wednesday Afternoon)
Issued at 255 PM CDT Tue Jul 18 2017

The synoptic pattern early this afternoon features a strong upper-
level ridge anchored across the central Plains. This ridge will
slowly meander eastward through the period, enhancing its influence
over the Midwest which will help bring even warmer temperatures to
the region on Wednesday.

Main forecast concern will be the dangerous heat which has started
across the area today and will only worsen on Wednesday.  Latest air
temperatures this hour sit in the low to mid 90s (STL at 97) which
coupled with dewpoints in the upper 60s/70s have yielded heat index
values from 95-105.  As we head into Wednesday, the upper-level
ridge building overhead should help push a weak boundary off to the
northeast of the region. The further northward displacement of the
front should enable dewpoints to mix out more efficiently than they
have today.  That being said, increasing 850mb temps and 1000-850mb
thicknesses suggest temperatures will likely be warmer than today,
with values in the mid 90s and into the 100s in the STL metro. This
will translate to heat index values topping out near 105 in many
areas (especially along/north of I-70). Given the heat is only
expected to worsen Thursday into the upcoming weekend (see long term
section below), have decided to upgrade portions of the Excessive
Heat Watch to an Excessive Heat Warning in all areas but southeast
MO and extreme southwest IL. In these areas, slightly lower
dewpoints should limit heat index values to the 100-104 range.

The other more minor forecast concern will be on convective chances
this afternoon into this evening. Latest radar imagery depicts some
very isolated showers along a weak front over southeast MO and along
a differential heating zone over central MO. Given a fairly uncapped
atmosphere, we will likely continue to see isolated shower/storm
development in these regions through early this evening.  Will have
to keep an eye on an MCV/compact shortwave trough diving through the
weak northwest flow aloft this evening. This mid-level forcing has
been enough to force some showers and isolated storms over northwest
MO, which could move into northeast MO and west-central IL through 2-
3Z (perhaps even lingering a bit later). Guidance has not handled
this system well today so confidence in convective coverage
associated with this feature is fairly low.

KD

.LONG TERM...  (Wednesday Night through Next Tuesday)
Issued at 255 PM CDT Tue Jul 18 2017

A widespread and significant heat wave will be ongoing at the start
of the period with a strong upper level RIDGE dominating our region.
 Although the strength of this RIDGE will weaken some heading into
Friday and Saturday, it is enough to maintain the going pattern and
effects thru this time period, as it will have the effect of hanging
a surface cold front to our north with southwest surface flow over
our region and minimal chances for rain.  Look for max air temps
from the the mid 90s to the low 100s with heat index values from 105
to 114 each afternoon and early evening.  The remnant Heat Watch
will be converted to a Warning for all areas outside of southeast MO
and far southern IL, with those areas being converted to an Advisory
where the cooler effects of the Ozarks will place peak heat indices
a bit more in check.

All of the models develop, at some point, increasing NW flow aloft
in response to a TROF settling into the Great Lakes region with this
to continue into early next week.  The point of contention remains
just exactly when do they do it, which will directly impact on when
this current heat wave ends.  The GFS continues to suggest the need
for an extension of heat headlines for many areas into Sunday, while
the CMC and to a slightly lesser extent, the EC are showing much
less of a need, especially in the northern CWA.  We currently have a
Heat Watch for our southeast MO and far southern IL counties thru
early Sunday evening and this remains a plausible and valid time for
that area given a decent consensus that the front will remain
upstream.  All other areas further north, the uncertainty increases
and decided to keep the end of the heat headlines at early Saturday
evening for now until we get a better handle on timing of the late
weekend cold front.

Models then come into better alignment by Monday, with NW flow aloft
and a cold front thru and bring to an end this latest heat event
with more seasonable temps, if not a little below average.  What
looks to be more dubious is the pcpn chances, and prefer to keep
that at or below CLIMO values for now.

TES

&&

.AVIATION...  (For the 18z TAFs through 18z Wednesday Afternoon)
Issued at 1221 PM CDT Tue Jul 18 2017

VFR conditions expected through the period. While we can't
completely rule out a stray storm today into this evening at
SUS/CPS/STL/UIN, think coverage will be too low to warrant any
mention for now. Otherwise, fairly light and variable winds this
afternoon will turn more to the SSW through the day on Wednesday.

KD

&&

.PRELIMINARY POINT TEMPS/POPS...
Saint Louis     80 104  80 103 /  10   5   0   0
Quincy          74  94  74  98 /  20   5   5   0
Columbia        73  96  74  98 /  10   5   0   0
Jefferson City  73  97  74  99 /  10   0   0   0
Salem           70  94  74  97 /   5   5   0   0
Farmington      71  96  72  98 /  20   0   0   0

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...Heat Advisory from noon Wednesday to 8 PM CDT Sunday for
     Crawford MO-Iron MO-Madison MO-Reynolds MO-Saint Francois
     MO-Sainte Genevieve MO-Washington MO.

     Excessive Heat Warning until 8 PM CDT Saturday for Audrain MO-
     Boone MO-Callaway MO-Cole MO-Franklin MO-Gasconade MO-
     Jefferson MO-Lincoln MO-Marion MO-Moniteau MO-Monroe MO-
     Montgomery MO-Osage MO-Pike MO-Ralls MO-Saint Charles MO-
     Saint Louis City MO-Saint Louis MO-Shelby MO-Warren MO.

     Excessive Heat Warning from noon Wednesday to 8 PM CDT Saturday
     for Knox MO-Lewis MO.

IL...Heat Advisory from noon Wednesday to 8 PM CDT Sunday for
     Randolph IL.

     Excessive Heat Warning until 8 PM CDT Saturday for Madison IL-
     Monroe IL-Saint Clair IL.

     Excessive Heat Warning from noon Wednesday to 8 PM CDT Saturday
     for Adams IL-Bond IL-Brown IL-Calhoun IL-Clinton IL-Fayette
     IL-Greene IL-Jersey IL-Macoupin IL-Marion IL-Montgomery IL-
     Pike IL-Washington IL.

&&

WFO LSX

Hazardous Weather Outlook
National Weather Service Saint Louis MO
330 PM CDT Tue Jul 18 2017

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-191200-
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-
330 PM CDT Tue Jul 18 2017

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

.DAY ONE...Tonight

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

.DAYS TWO THROUGH SEVEN...Wednesday through Monday

Dangerous heat and humidity will expand areawide by Wednesday
afternoon and is expected to continue into this weekend. Heat
index values of 105 degrees or higher are expected during the
afternoon and early evening hours each day. Excessive Heat
Warnings and Advisories have been issued -- please refer to these
products for more information.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

TES