Hazard Report Provided By forecast.weather.gov

URGENT - WEATHER MESSAGE
National Weather Service St Louis MO
206 PM CDT Fri Jul 18 2025

ILZ079-100>102-MOZ041-042-047>052-059>065-072>075-084-085-099-191015-
/O.NEW.KLSX.XH.W.0002.250719T1700Z-250724T0000Z/
Randolph IL-Madison IL-Saint Clair IL-Monroe IL-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-
Including the cities of Saint Charles, Edwardsville, Union, Saint
Louis, Fulton, Alton, Mexico, Jefferson City, Farmington,
Washington, Belleville, Chester, Cahokia, Sullivan, Sparta, and
Columbia
206 PM CDT Fri Jul 18 2025

...EXTREME HEAT WARNING IN EFFECT FROM NOON SATURDAY TO 7 PM CDT
WEDNESDAY...

* WHAT...Dangerously hot conditions with heat index values up to 110
  expected.

* WHERE...Portions of southwest Illinois and central, east central,
  and southeast Missouri.

* WHEN...From noon Saturday to 7 PM CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat and high humidity events.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors. Young children and
pets should never be left unattended in vehicles under any
circumstances. Take extra precautions if you work or spend time
outside. When possible reschedule strenuous activities to early
morning or evening. Know the signs and symptoms of heat exhaustion
and heat stroke. Wear lightweight and loose fitting clothing when
possible. 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.

&&

$$

Hazardous Weather Outlook
National Weather Service St Louis MO
307 PM CDT Fri Jul 18 2025

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-192015-
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-
307 PM CDT Fri Jul 18 2025

This Hazardous Weather Outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight.

There is a chance of thunderstorms tonight across portions of the
area.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There is a chance of thunderstorms Saturday through Tuesday. There is
a low threat of damaging winds and flash flooding across northeastern
Missouri and west-central Illinois Saturday morning.

A long-duration heat wave is expected to begin along and south of
Interstate 70 into southwestern Illinois on Saturday, expanding to
the rest of the area around Monday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

$$

Pfahler

Hazard Report Provided By forecast.weather.gov