Area Forecast Discussion

744
FXUS63 KLSX 141712
AFDLSX

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
1112 AM CST Wed Jan 14 2026

.KEY MESSAGES...

- Temperatures today will fall into the 30s with gusty northwest
  winds, which will make it feel like its in the 10s/20s.

- Multiple cold fronts are expected to move through over the next
  several days. Below to well-below normal temperatures are
  expected, with the coldest stretch between Saturday and Tuesday.


&&

.SHORT TERM...  (Through Late Tonight)
Issued at 242 AM CST Wed Jan 14 2026

The synoptic cold front as of 0800 UTC is near the I-44/I-55
corridors in Missouri and Illinois respectively. This boundary
will move out of the area just before 1200 UTC. Strong low-level
cold air advection will commence in its wake, with temperatures
falling through the afternoon into the 30s. These readings would
be about 20- 30 degrees colder than 24 hours prior. In addition,
sustained wind speeds of 15-25 mph with gusts of 30-35+ mph are
expected. This will make it feel even colder, with wind chill
values in the teens and twenties. Some of the gusts in northeast
Missouri and west-central Illinois may approach 40 mph mid to late
morning, but should stay below advisory criteria (45+ mph).
Probabilities of max wind gusts from the NBM only peak out in the
20-25% range, but do climb to near 50% for 40+ mph gusts. This
field has shown quite a bit of skill with respect to peak wind
speeds behind cold fronts so far this winter season. Soundings
also do not show much in the way of 40+ knot winds at the top of
the mixed layer today, further buttressing the point that advisory
level gusts look quite unlikely.

Winds tonight will slacken off gradually as a surface ridge
approaches central/northeast Missouri by 1200 UTC Thursday. A clear
sky, weakening winds, low dewpoints (

NWS LSX Office Area Forecast Discussion