Alert archive / Missouri / Heat Advisories in 2021
Heat Advisory 3, NWS St. Louis, MO
NWS St. Louis, MO issued this heat advisory at Jul 27, 2021, 2:47 AM CDT for 17 counties in Illinois; 29 counties in Missouri. It took effect at Jul 28, 2021, 12:00 PM CDT. It was in force for 33 hr.
The area
The counties it named.
The facts
- Issued
- Jul 27, 2021, 2:47 AM CDT (07:47 UTC)
- In effect from
- Jul 28, 2021, 12:00 PM CDT
- Expired
- Jul 29, 2021, 9:00 PM CDT
- In force
- 33 hr
- Issued by
- NWS St. Louis, MO
All 46 counties
Adams County, IL, Bond County, IL, Brown County, IL, Calhoun County, IL, Clinton County, IL, Fayette County, IL, Greene County, IL, Jersey County, IL, Macoupin County, IL, Madison County, IL, Marion County, IL, Monroe County, IL, Montgomery County, IL, Pike County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Audrain County, MO, Boone County, MO, Callaway County, MO, City of Saint Louis, MO, Cole County, MO, Crawford County, MO, Franklin County, MO, Gasconade County, MO, Iron County, MO, Jefferson County, MO, Knox County, MO, Lewis County, MO, Lincoln County, MO, Madison County, MO, Marion County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Osage County, MO, Pike County, MO, Ralls County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shelby County, MO, Warren County, MO, Washington County, MO
The radar
The St Louis radar (KLSX), 18 km from the middle of the area, began a volume at 07:46 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 7.8 hours before the alert went out and 241 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1737 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted.
869 WWUS73 KLSX 270747 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 247 AM CDT Tue Jul 27 2021 ILZ058-069-074-079-095>102-MOZ018-019-026-027-034>036-041-042- 047>052-059>065-075-272300- /O.NEW.KLSX.HT.Y.0003.210728T1700Z-210729T0300Z/ Greene IL-Clinton IL-Washington IL-Randolph IL-Adams IL-Brown IL- Pike IL-Calhoun IL-Jersey IL-Madison IL-Saint Clair-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- Sainte Genevieve MO- Including the cities of Saint Louis, Mount Sterling, Cahokia, Quincy, Pittsfield, Alton, Union, Washington, Sparta, Bowling Green, Mexico, Jefferson City, Belleville, Edwardsville, Chester, Saint Charles, Columbia, Hannibal, Sullivan, and Fulton 247 AM CDT Tue Jul 27 2021 ...HEAT ADVISORY IN EFFECT FROM NOON TO 10 PM CDT WEDNESDAY... * WHAT...Heat index values up to 105 expected. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...From Noon to 10 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. && $$ BSH
7 follow-up statements
375 WWUS73 KLSX 271557 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 1057 AM CDT Tue Jul 27 2021 ILZ059-060-064-065-070-MOZ072>074-084-085-099-280700- /O.EXB.KLSX.HT.Y.0003.210728T1700Z-210730T0200Z/ Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Marion IL-Crawford MO-Washington MO-Saint Francois MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Litchfield, Centralia, Salem, Vandalia, and Farmington 1057 AM CDT Tue Jul 27 2021 ...HEAT ADVISORY IN EFFECT FROM NOON WEDNESDAY TO 9 PM CDT THURSDAY... * WHAT...Heat index values up to 105 expected on Wednesday and 110 on Thursday. * WHERE...Portions of south central and southwest Illinois. Portions of east central and southeast Missouri. * WHEN...From Noon Wednesday to 9 PM CDT Thursday. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ ILZ058-069-074-079-095>099-MOZ018-019-026-027-034>036-041-042- 047>052-059-060-062-075-280700- /O.EXT.KLSX.HT.Y.0003.210728T1700Z-210730T0200Z/ Greene IL-Clinton IL-Washington IL-Randolph IL-Adams IL-Brown IL- Pike IL-Calhoun IL-Jersey 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-Franklin MO-Sainte Genevieve MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Sparta, Union, Washington, Mexico, Bowling Green, Jefferson City, Chester, Sullivan, Hannibal, and Fulton 1057 AM CDT Tue Jul 27 2021 ...HEAT ADVISORY NOW IN EFFECT FROM NOON WEDNESDAY TO 9 PM CDT THURSDAY... * WHAT...Heat index values up to 105 expected on Wednesday and 110 on Thursday. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...From Noon Wednesday to 9 PM CDT Thursday. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. 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. 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. && $$ ILZ100>102-MOZ061-063>065-280700- /O.EXT.KLSX.HT.Y.0003.210728T1700Z-210730T0200Z/ Madison IL-Saint Clair-Monroe IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Cahokia, Alton, Saint Louis, Belleville, and Edwardsville 1057 AM CDT Tue Jul 27 2021 ...HEAT ADVISORY NOW IN EFFECT FROM NOON WEDNESDAY TO 9 PM CDT THURSDAY... * WHAT...Heat index values up to 105 expected on Wednesday and 110 on Thursday. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties. * WHEN...From Noon Wednesday to 9 PM CDT Thursday. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ CVKING
346 WWUS73 KLSX 280916 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 416 AM CDT Wed Jul 28 2021 ILZ058>060-064-065-069-070-074-079-095>099-MOZ018-019-026-027- 034>036-041-042-047>052-059-060-062-072>075-084-085-099-290030- /O.CON.KLSX.HT.Y.0003.210728T1700Z-210730T0200Z/ 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-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- Franklin MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Sparta, Litchfield, Washington, Mexico, Bowling Green, Centralia, Jefferson City, Salem, Chester, Union, Farmington, Sullivan, Hannibal, Vandalia, and Fulton 416 AM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 9 PM CDT THURSDAY... * WHAT...Heat index values up to 111 expected. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...From Noon today to 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. 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. && $$ ILZ100>102-MOZ061-063>065-290030- /O.CON.KLSX.HT.Y.0003.210728T1700Z-210730T0200Z/ Madison IL-Saint Clair-Monroe IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Cahokia, Alton, Saint Louis, Belleville, and Edwardsville 416 AM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT FROM NOON TODAY TO 9 PM CDT THURSDAY... * WHAT...Heat index values up to 112 expected. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties. * WHEN...From Noon today to 9 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ BSH
711 WWUS73 KLSX 282000 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 300 PM CDT Wed Jul 28 2021 ILZ058>060-064-065-069-070-074-079-095>099-MOZ018-019-026-027- 034>036-041-042-047>052-059-060-062-072>075-084-085-099-291200- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ 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-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- Franklin MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Sparta, Litchfield, Washington, Mexico, Bowling Green, Centralia, Jefferson City, Salem, Chester, Union, Farmington, Sullivan, Hannibal, Vandalia, and Fulton 300 PM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THURSDAY... * WHAT...Heat index values up to 107. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. 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. 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. && $$ ILZ100>102-MOZ061-063>065-291200- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ Madison IL-Saint Clair-Monroe IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Cahokia, Alton, Saint Louis, Belleville, and Edwardsville 300 PM CDT Wed Jul 28 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THURSDAY... * WHAT...Heat index values up to 109. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties. * WHEN...Until 9 PM CDT Thursday. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ MRM
164 WWUS73 KLSX 290938 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 438 AM CDT Thu Jul 29 2021 ILZ058>060-064-065-069-070-074-079-095>099-MOZ018-019-026-027- 034>036-041-042-047>052-059-060-062-072>075-084-085-099-300045- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ 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-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- Franklin MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Sparta, Litchfield, Washington, Mexico, Bowling Green, Centralia, Jefferson City, Salem, Chester, Union, Farmington, Sullivan, Hannibal, Vandalia, and Fulton 438 AM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 108. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. 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. && $$ ILZ100>102-MOZ061-063>065-300045- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ Madison IL-Saint Clair-Monroe IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Cahokia, Alton, Saint Louis, Belleville, and Edwardsville 438 AM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 110. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ BSH
296 WWUS73 KLSX 290941 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 441 AM CDT Thu Jul 29 2021 ILZ058>060-064-065-069-070-074-079-095>099-MOZ018-019-026-027- 034>036-041-042-047>052-059-060-062-072>075-084-085-099-300045- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ 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-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- Franklin MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Sparta, Litchfield, Washington, Mexico, Bowling Green, Centralia, Jefferson City, Salem, Chester, Union, Farmington, Sullivan, Hannibal, Vandalia, and Fulton 441 AM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 108. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. 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. 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. && $$ ILZ100>102-MOZ061-063>065-300045- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ Madison IL-Saint Clair-Monroe IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Cahokia, Alton, Saint Louis, Belleville, and Edwardsville 441 AM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 110. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ BSH
273 WWUS73 KLSX 291931 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 231 PM CDT Thu Jul 29 2021 ILZ058>060-064-065-069-070-074-079-095>099-MOZ018-019-026-027- 034>036-041-042-047>052-059-060-062-072>075-084-085-099-300200- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ 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-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- Franklin MO-Crawford MO-Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-Madison MO-Reynolds MO- Including the cities of Mount Sterling, Columbia, Quincy, Pittsfield, Sparta, Litchfield, Washington, Mexico, Bowling Green, Centralia, Jefferson City, Salem, Chester, Union, Farmington, Sullivan, Hannibal, Vandalia, and Fulton 231 PM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 108. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of central, east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT this evening. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. 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. 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. && $$ ILZ100>102-MOZ061-063>065-300200- /O.CON.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ Madison IL-Saint Clair-Monroe IL-Saint Charles MO-Saint Louis MO- Saint Louis City MO-Jefferson MO- Including the cities of Saint Charles, Cahokia, Alton, Saint Louis, Belleville, and Edwardsville 231 PM CDT Thu Jul 29 2021 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING... * WHAT...Heat index values up to 110. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties. * WHEN...Until 9 PM CDT this evening. * IMPACTS...The combination of hot temperatures and high humidity may lead to heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. && $$ Elmore
352 WWUS73 KLSX 300153 NPWLSX URGENT - WEATHER MESSAGE National Weather Service St Louis MO 853 PM CDT Thu Jul 29 2021 ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027- 034>036-041-042-047>052-059>065-072>075-084-085-099-300300- /O.EXP.KLSX.HT.Y.0003.000000T0000Z-210730T0200Z/ 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-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- Including the cities of Mount Sterling, Quincy, Cahokia, Union, Bowling Green, Columbia, Pittsfield, Alton, Sparta, Centralia, Farmington, Vandalia, Litchfield, Saint Louis, Jefferson City, Belleville, Edwardsville, Chester, Hannibal, Fulton, Saint Charles, Mexico, Sullivan, Washington, and Salem 853 PM CDT Thu Jul 29 2021 ...HEAT ADVISORY WILL EXPIRE AT 9 PM CDT THIS EVENING... The threat has ended. $$ Elmore
Nearby
Heat Advisories in Missouri, 2021Heat Advisories in Illinois, 2021Every heat advisory in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.