Special Weather Statement, NWS St. Louis, MO

Area Forecast Discussion
National Weather Service Saint Louis MO
429 PM CDT Sun Jun 10 2018

.SHORT TERM...  (Through Late Monday Afternoon)
Issued at 424 PM CDT Sun Jun 10 2018

Thunderstorms continue to develop along a front and residual
outflow boundaries from earlier convection across west central and
south central Illinois. Scattered storms will continue to develop
along these boundaries into tonight as weak upper level
disturbances move southeast along the boundary in a very moist and
unstable atmosphere. There will continue to be the potential for a
few strong to severe thunderstorms, capable of producing large
hail and damaging winds. A few storms may also produce locally
heavy rainfall given PWATS around 1.5 inches.

Tomorrow will be mainly dry as an upper level ridge moves over the
area. Though isolated thunderstorms will develop along a front
across parts of northeast Missouri and central Illinois late in
the day as the atmosphere becomes unstable and less capped.
Temperatures will climb back into the lower to mid 90s with
dewpoints in the lower 70s which will result in heat index
readings in the 100 to near 105 range. Will need to continue to
evaluate for a possible heat advisory.

Britt

.LONG TERM...  (Monday Night through Next Sunday)
Issued at 424 PM CDT Sun Jun 10 2018

A cold front will move across the area Monday night into Tuesday
bringing another chance of showers and thunderstorms. A few of
these storms could be strong to severe across the area. The front
will not move too far to the south of the area on Tuesday night
before stalling midweek. The front will then move back north into
the area late in the week which will keep a chance of storms in
the forecast for at least part of the region for most of the week.
With 850mb temperatures staying around 20C, expect temperatures to
remain above normal this week.

Britt

&&

.AVIATION...  (For the 12z TAFs through 12z Monday Morning)
Issued at 100 PM CDT Sun Jun 10 2018

Mainly dry and VFR conditions are expected through the period.
Some scattered thunderstorms will affect parts of northeast
Missouri and west central Illinois which may affect KUIN, but
there is too much uncertainty to include in the TAF at this time.

SPECIFICS FOR KSTL: Dry and VFR conditions are expected through
the period.

&&

.LSX WATCHES/WARNINGS/ADVISORIES...
MO...None.
IL...None.
&&

WFO LSX

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Special Weather Statement
National Weather Service St Louis MO
129 PM CDT SUN JUN 10 2018

ILZ060-064-065-101915-
Bond IL-Montgomery IL-Fayette IL-
129 PM CDT SUN JUN 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL BOND...NORTHWESTERN
FAYETTE AND MONTGOMERY COUNTIES UNTIL 215 PM CDT...

At 128 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Pana to near Litchfield. Movement was
southeast at 25 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations impacted include...
Litchfield, Hillsboro, Nokomis, Ramsey, Raymond, Witt, Taylor
Springs, Coffeen, Schram City, Irving, Herrick, Panama, Fillmore,
Coalton, Donnellson, Butler, Ohlman, Bingham, Walshville and Wenonah.

This includes Interstate 55 in Illinois between exits 52 and 60.

This also includes  Ramsey Lake State Park and Lake Lou Yaeger.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central and southwestern Illinois.

LAT...LON 3897 8945 3909 8970 3927 8970 3935 8951
      3935 8914 3922 8914 3922 8884
TIME...MOT...LOC 1828Z 294DEG 21KT 3945 8915 3920 8975

Kanofsky

Special Weather Statement
National Weather Service St Louis MO
324 PM CDT SUN JUN 10 2018

ILZ095-102100-
Adams IL-
324 PM CDT SUN JUN 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN ADAMS COUNTY UNTIL 400
PM CDT...

At 324 PM CDT, Doppler radar was tracking a strong thunderstorm near
Mendon, moving east at 25 mph.

Dime size hail and winds in excess of 30 mph will be possible with
this storm.

Locations impacted include...
Camp Point, Mendon, Golden, Ursa, Loraine, Woodville, Lima and
Chatton.

LAT...LON 4020 9102 4004 9101 4005 9145 4020 9146
TIME...MOT...LOC 2024Z 268DEG 22KT 4017 9128

Kanofsky

Special Weather Statement
National Weather Service St Louis MO
417 PM CDT SUN JUN 10 2018

ILZ060-065-102145-
Montgomery IL-Fayette IL-
417 PM CDT SUN JUN 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN FAYETTE AND EAST
CENTRAL MONTGOMERY COUNTIES UNTIL 445 PM CDT...

At 417 PM CDT, Doppler radar was tracking a strong thunderstorm near
Nokomis, moving east at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Nokomis, Ohlman and Wenonah.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central Illinois.

LAT...LON 3915 8929 3935 8929 3935 8914 3920 8914
TIME...MOT...LOC 2117Z 252DEG 21KT 3926 8919

Tilly

Special Weather Statement
National Weather Service St Louis MO
438 PM CDT SUN JUN 10 2018

ILZ065-102200-
Fayette IL-
438 PM CDT SUN JUN 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN FAYETTE COUNTY UNTIL
500 PM CDT...

At 438 PM CDT, Doppler radar was tracking a strong thunderstorm near
Beecher City, moving east at 15 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Wrights Corner.

A Severe Thunderstorm Watch remains in effect until 800 PM CDT for
south central Illinois.

LAT...LON 3908 8894 3922 8894 3922 8881 3920 8880
      3907 8881
TIME...MOT...LOC 2138Z 268DEG 15KT 3918 8885

Tilly