Severe Thunderstorm Warning  Statement as of 8:58 PM CDT on April 30, 2016

... A Severe Thunderstorm Warning remains in effect until 915 PM CDT
for northwestern Washington... southwestern Clinton... St. Clair and
central Monroe counties...

At 857 PM CDT... a severe thunderstorm was located near Scott AFB...
moving east at 35 mph.

Hazard... quarter size hail.

Source... trained weather spotters.

Impact... damage to vehicles is expected.

Locations impacted include...
Belleville... O'Fallon... Fairview Heights... Cahokia... Swansea... Shiloh...
Waterloo... Columbia... Mascoutah... Centreville... Freeburg... Millstadt... Red
Bud... New Baden... Scott AFB... Smithton... New Athens... Alorton... Okawville
and Valmeyer.

This includes Interstate 64 in Illinois between exits 34 and 41.

Precautionary/preparedness actions...

This storm is producing large hail. Seek shelter now inside a sturdy
structure and stay away from windows.

Torrential rainfall is occurring with this storm... and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Lat... Lon 3822 8986 3822 9004 3827 9037 3829 9037
      3859 9011 3849 8943
time... Mot... loc 0157z 282deg 31kt 3849 8987

Hail... 1.00in
wind... <50mph


 Severe Thunderstorm Watch  Statement as of 9:03 PM CDT on April 30, 2016

Severe Thunderstorm Watch 132 remains in effect until 1000 PM CDT

. Illinois counties included are

Bond Brown Calhoun
Clinton Fayette Greene
Jersey Macoupin Madison
Marion Monroe Montgomery
Pike Randolph St. Clair

 Local Storm Report 

04/30/2016 0827 PM

Columbia, Monroe County.

Hail m0.70 inch, reported by trained spotter.

04/30/2016 0827 PM

Columbia, Monroe County.

Hail m0.70 inch, reported by trained spotter.

 Public Information Statement  Statement as of 4:03 PM CDT on April 30, 2016

... Safety rules for severe thunderstorms...

A Severe Thunderstorm Watch has been issued by the National
Weather Service. In the interest of public safety, the
following safety rules are provided. Public and commercial
broadcast stations serving the affected area are asked to
broadcast these safety measures frequently while the watch is
in effect.

A Severe Thunderstorm Watch means conditions are favorable for
the development of severe thunderstorms in and close to the
watch area. If you are in the watch area, keep up to date of
the latest weather information. These storms can develop
rapidly so there may be occasions when advance warning is not

A Severe Thunderstorm Warning means a severe thunderstorm has
been observed or indicated on radar. If you are in the path
or near the storm, take immediate actions to protect life and
property. Follow these safety rules:

(1) in open country, you should seek shelter and avoid trees
which can be targets for lightning. If there is no shelter,
go to a ditch or culvert but beware of rising water which can
cause flooding.

(2) when indoors, stay away from outside walls and windows
and go to an interior room on the lowest level. Avoid using
electrical appliances while the storm is nearby.

(3) in Mobile homes, you should leave and seek nearby safe

(4) if swimming or on a boat, you should get to shore as
quickly as possible and find shelter.

A thunderstorm is considered severe when it contains one inch
or larger diameter size hail and/or wind gusts of 58 miles an
hour or greater. A severe thunderstorm can also produce deadly
lightning and very heavy rain which can lead to flash flooding.

Remember, with any severe thunderstorm there is always the
possibility of tornadoes.

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