The NWS has issued a TORNADO WARNING for the city of St. Louis until 6:00 pm CDT 
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM CDT FOR
SOUTHWESTERN MADISON COUNTY IN SOUTHWESTERN ILLINOIS AND NORTHEASTERN
ST. LOUIS COUNTIES IN EAST CENTRAL MISSOURI AND NORTHEASTERN ST.
LOUIS CITY...
At 534 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Riverview, moving southeast at 45 mph.
HAZARD...Tornado.
SOURCE...Weather spotters reported a funnel cloud.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
St. Louis, Florissant, Granite City, Hazelwood, Ferguson, Jennings,
Bellefontaine Neighbors, Black Jack, Pontoon Beach, Dellwood,
Madison, Riverview, Venice, Spanish Lake, Moline Acres, Calverton
Park, Brooklyn, Castle Point, Glasgow Village and Mitchell.
This also includes Horseshoe Lake State Park.
&&
LAT...LON 3866 9016 3866 9018 3877 9033 3885 9025
3882 9019 3882 9017 3875 9003
TIME...MOT...LOC 2234Z 323DEG 37KT 3875 9022
TORNADO...RADAR INDICATED
HAIL...<.75IN
Instructions:
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Address/Location
City of St. Louis Emergency Management
1915 Olive St
St. Louis, MO 63103
Contact
Emergency: 9-1-1