Nimbus

Heat Advisory

NWS St Louis MO ยท US

Updated

Details

Heat Advisory issued September 15 at 11:53AM CDT until September 18 at 8:00PM CDT by NWS St Louis MO

Issued
Onset
Expires
Category
Meteorological
Urgency
Expected
Severity
Moderate
Certainty
Likely
Response
Execute

Description

What

Heat index values up to 106.

Where

Portions of south central and southwest Illinois and central, east central, and southeast Missouri.

When

Until 8 PM CDT Friday.

Impacts

Hot temperatures and high humidity may cause heat illnesses.

Instructions

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. 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.

Affected areas

  • Bond
  • Clinton
  • Marion
  • Washington
  • Randolph
  • Madison
  • St. Clair
  • Monroe
  • Moniteau
  • Cole
  • Osage
  • Gasconade
  • Warren
  • St. Charles
  • Franklin
  • St. Louis
  • St. Louis City
  • Jefferson
  • Crawford
  • Washington
  • St. Francois
  • Ste. Genevieve
  • Iron
  • Madison
  • Reynolds

Public contact

Issuer
NWS St Louis MO

Message record

Received
CAP status
Actual
CAP message type
Update
Lifecycle
Updated
Source
NWWS-OI
Feed
NWWS
Recovered
No
CAP routing and identity
ULID
01M2JZSTHSVQENXN5PK3YE4Q1K
Identifier
urn:oid:2.49.0.1.840.0.875cdbf9b5b58cfdbfe2e0a933cdff19d4d8d486.001.1
Sender
w-nws.webmaster@noaa.gov
Scope
Public
CAP source
211803 v2.3.0
Handling codes
IPAWSv1.0
Issuing office
NWS St Louis MO
AWIPS ID
CAPLSX
NWWS sequence
nwws_processor.6694
WMO heading
XOUS53
WMO data type
CAP alert message XML (XO)
WMO geography
United States (US)
WMO bulletin number
53

References

Identifier
urn:oid:2.49.0.1.840.0.1382cb5a279f8b74020af5ffaa3c82f7467ab3b1.001.1
Sender
w-nws.webmaster@noaa.gov
Sent

Event codes

NameValue
SAMENWS
NationalWeatherServiceHTY

Parameters

NameValue
AWIPSidentifierNPWLSX
WMOidentifierWWUS73 KLSX 151653
NWSheadlineHEAT ADVISORY NOW IN EFFECT UNTIL 8 PM CDT FRIDAY
BLOCKCHANNELEAS
BLOCKCHANNELNWEM
VTEC/O.EXT.KLSX.HT.Y.0012.000000T0000Z-260919T0100Z/
eventEndingTime2026-09-18T20:00:00-05:00
BLOCKCHANNELCMAS
expiredReferencesw-nws.webmaster@noaa.gov,urn:oid:2.49.0.1.840.0.327474d7d69051ee18989fc7a661c16623bfeab0.001.1,2026-09-14T11:30:00-05:00
Locations

Location data

  • Bond
  • Clinton
  • Marion
  • Washington
  • Randolph
  • Madison
  • St. Clair
  • Monroe
  • Moniteau
  • Cole
  • Osage
  • Gasconade
  • Warren
  • St. Charles
  • Franklin
  • St. Louis
  • St. Louis City
  • Jefferson
  • Crawford
  • Washington
  • St. Francois
  • Ste. Genevieve
  • Iron
  • Madison
  • Reynolds
NameValue
SAME017005
SAME017027
SAME017121
SAME017189
SAME017157
SAME017119
SAME017163
SAME017133
SAME029135
SAME029051
SAME029151
SAME029073
SAME029219
SAME029183
SAME029071
SAME029189
SAME029510
SAME029099
SAME029055
SAME029221
SAME029187
SAME029186
SAME029093
SAME029123
SAME029179
UGCILZ064
UGCILZ069
UGCILZ070
UGCILZ074
UGCILZ079
UGCILZ100
UGCILZ101
UGCILZ102
UGCMOZ047
UGCMOZ048
UGCMOZ049
UGCMOZ059
UGCMOZ060
UGCMOZ061
UGCMOZ062
UGCMOZ063
UGCMOZ064
UGCMOZ065
UGCMOZ072
UGCMOZ073
UGCMOZ074
UGCMOZ075
UGCMOZ084
UGCMOZ085
UGCMOZ099