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Based on EAS CAP index feed from NOAA's NWS, this service allows you to choose only those county codes that are of interest to you and provides optional tone alerts for warnings and watches. For each full CAP message use the "more" link(s).

This page will refresh itself in .
This is NOT to be used alone for protection of life or property and is not a replacement for an All-Hazards Radio. Do not rely on a single source such as tornado sirens, TV, AM/FM radio or cell phone services. Buy and use an All-Hazards Radio.

Change settings <- limit to your area only;
Tone alert is off;
Missouri last updated by NWS: Thu, 18 Jan 2018 9:42 pm CST last access: 18 Jan 9:43 pm CST;
Illinois last updated by NWS: Thu, 18 Jan 2018 9:42 pm CST last access: 18 Jan 9:43 pm CST;


Summary:There are no active watches, warnings or advisories for the selected area;
Tone alert is off;

Change settings <- limit to your area only;
Selected S.A.M.E. codes Providing current severe weather warnings, watches and related information for the following:
029019 Boone, MO · 029027 Callaway, MO · 029007 Audrain, MO · 029139 Montgomery, MO · 029137 Monroe, MO · 029205 Shelby, MO · 029103 Knox, MO · 029111 Lewis, MO · 029127 Marion, MO · 029173 Ralls, MO · 029163 Pike, MO · 017001 Adams, IL · 017149 Pike, IL · 017013 Calhoun, IL · 029113 Lincoln, MO · 029089 Howard, MO · 029053 Cooper, MO · 029135 Moniteau, MO · 029051 Cole, MO · 029151 Osage, MO · 029073 Gasconade, MO · 029071 Franklin, MO · 029189 St. Louis, MO · 029510 St. Louis City, MO · 029099 Jefferson, MO · 029055 Crawford, MO · 029221 Washington, MO · 029187 St. Francois, MO · 029186 Ste. Genevieve, MO · 029093 Iron, MO · 029161 Phelps, MO · 029157 Perry, MO · 029223 Wayne, MO · 029017 Bollinger, MO · 029219 Warren, MO · 029183 St. Charles, MO · 029123 Madison, MO · 029179 Reynolds, MO · 017061 Greene, IL · 017083 Jersey, IL · 017117 Macoupin, IL · 017119 Madison, IL · 017163 St. Clair, IL · 017133 Monroe, IL · 017157 Randolph, IL · 017135 Montgomery, IL · 017005 Bond, IL · 017051 Fayette, IL · 017027 Clinton, IL · 017189 Washington, IL · 017121 Marion, IL · 017009 Brown, IL · 017081 Jefferson, IL · 017191 Wayne, IL · 017145 Perry, IL · 029141 Morgan, MO ·
Defintions Warning (Emergency) — Issued when a hazardous event is occurring or has a very high probability of occurrence. The NWS warns of a dangerous threat to life or property.
Advisory (Alert) — Issued when a hazardous event is occurring or has a very high probability of occurrence. Advisories describe events that cause significant inconvenience. The NWS advises caution.
Watch — Issued when the risk of a hazardous weather or hydrologic event has increased significantly, but its occurrence, location, and/or timing is still uncertain. It is intended to provide enough lead time so those who need to set their plans in motion can do so. The NWS forecasts the potential for this event.
Outlook or Statement — Used to give considerable lead time that a hazardous event may develop.

Immediate — Responsive action SHOULD be taken immediately
Expected — Responsive action SHOULD be taken soon
Future — Responsive action SHOULD be taken in the near future
Past — Responsive action is no longer required
Unknown — Urgency not known

Extreme — Extraordinary threat to life or property
Severe — Significant threat to life or property
Moderate — Possible threat to life or property
Minor — Minimal threat to life or property
Unknown — Severity unknown

Observed — Determined to have occurred or to be ongoing.
Likely — Likely
Possible — Possible but not likely
Unlikely — Not expected to occur
Unknown — Certainty unknown

EAS — Emergency Alert System
CAP — Common Alerting Protocol
NOAA — National Oceanics and Atmospherics Administration
NWS — National Weather Service
River gauge LIDs now link to their corresponding NWS Advanced Hydrology Prediction Service page.
Until times falling on midnight or noon local time will be displayed as one minute earlier and from times will display as one minute later to reduce confusion.
The summary from the NWS is all uppercase and conversion to mixed case is imperfect.
The NWS doesn't currently send S.A.M.E. codes for marine areas. A workaround is being developed.
NOAA: Tornado FAQ
Which NWS transmitters are having issues? (Does NOT affect this page.)
NOAA: Severe Weather Safety and Survival
USDA: guide to Food Safety in Severe Storms(PDF)
FEMA: Residential Safe Rooms
St. Louis County Emergency Management: Public Maps
Find cities in Missouri
Find cities in Illinois
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