Jefferson City, Missouri 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

174
FXUS63 KLSX 100252
AFDLSX

Area Forecast Discussion...Updated Aviation
National Weather Service Saint Louis MO
952 PM CDT Fri May 9 2025

.KEY MESSAGES...

-Dry weather continues through Sunday before a return to an active
pattern next week.

-Temperatures will continue warming through next week.


&&

.SHORT TERM...  (Through Late Saturday Night)
Issued at 127 PM CDT Fri May 9 2025

A surface high has moved into the mid-Mississippi Valley today and
the center of this feature will slide over the forecast area
tonight. A clear sky and calm winds from the high will allow for
effective cooling and Saturday morning`s lows will drop into the low
to mid 40s across much of the area. More sheltered locations could
see lows near or just below 40 degrees.

A mid-level low will stall across the lower Mississippi Valley over
the weekend, and combined with the persistent surface high, will
result in dry conditions and a clear sky. So despite the chilly
start, another day of abundant sunshine and mild warming aloft will
allow temperatures to warm into the mid 70s across the area Saturday.

Delia

&&

.LONG TERM...  (Sunday through Next Friday)
Issued at 127 PM CDT Fri May 9 2025

The surface high`s influence will continue through Sunday, keeping
the weekend dry across the forecast area. For the St. Louis region
this will feel like a special treat. The last dry weekend recorded
at KSTL was April 11-12! By Monday this blocking pattern will begin
to erode and the mid-level low will drift northeastward into the
Ohio River Valley. As the low moves east of the forecast area it
will bring an increase in shower and thunderstorm chances Monday and
Tuesday, mainly during the afternoon, enhanced by diurnally driven
instability.

While the best forcing and moisture for rain will be east of us
across the Ohio River Valley, chances for rain do extend up into our
forecast area, mainly across southeast Missouri and southern
Illinois. Rain is projected to be light, with only a 50% chance of
exceeding 0.1" across southeast Missouri and southern Illinois. By
Tuesday evening the mid-level low will be sliding away from the mid-
Mississippi Valley, allowing a mid-level ridge to move into the
region within the southern stream flow. This ridge will prompt a
drier mid-week period and kick our warming trend into high gear with
highs reaching into the 80s to near 90 for the second half of the
work week.

While the ridge will be in place across the area into the end of the
work week, a northern stream trough will swing across the US-Canada
border into the Great Lakes region by the end of the work week. The
surface reflection will bring a cold front through the area at the
end of the work week and the chance for showers and thunderstorms
returns to the area.

Delia

&&

.AVIATION...  (For the 06z TAFs through 06z Saturday Night)
Issued at 952 PM CDT Fri May 9 2025

VFR flight conditions and light winds are expected to prevail
through the period.

Carney

&&

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

$$

WFO LSX