U.S. Alerts
El Dorado Weather Logo
U.S. Radar Loop Conditions Map

U.S. Color Topo IR Sat North America Color Background Satellite Thumb
Interactive Wx Map Live U.S. Google Map Radar Thumbnail Image

US Precipitation 1 day, 24 hour precipitation map

US Temperatures US Conditions Map

US Climate Data US Conditions Map

Old Jamestown, Missouri 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for 3 Miles NNW Black Jack MO
National Weather Service Forecast for: 3 Miles NNW Black Jack MO
Issued by: National Weather Service Saint Louis, MO
Updated: 2:01 pm CDT Aug 24, 2026
 
Tonight

Tonight: Partly cloudy, with a low around 66. East wind 3 to 6 mph.
Partly Cloudy

Tuesday

Tuesday: Mostly sunny, with a high near 87. East wind around 7 mph.
Mostly Sunny

Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 70. East wind around 6 mph becoming calm  in the evening.
Partly Cloudy

Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after 1pm.  Mostly cloudy, then gradually becoming sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the morning.
Partly Sunny
then Slight
Chance
T-storms
Wednesday
Night
Wednesday Night: A 20 percent chance of showers and thunderstorms before 1am.  Mostly clear, with a low around 68. Northwest wind 3 to 5 mph.
Slight Chance
T-storms

Thursday

Thursday: Sunny, with a high near 87.
Sunny

Thursday
Night
Thursday Night: Mostly clear, with a low around 66.
Mostly Clear

Friday

Friday: Sunny, with a high near 87.
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 67.
Mostly Clear

Lo 66 °F Hi 87 °F Lo 70 °F Hi 90 °F Lo 68 °F Hi 87 °F Lo 66 °F Hi 87 °F Lo 67 °F

 

Tonight
 
Partly cloudy, with a low around 66. East wind 3 to 6 mph.
Tuesday
 
Mostly sunny, with a high near 87. East wind around 7 mph.
Tuesday Night
 
Partly cloudy, with a low around 70. East wind around 6 mph becoming calm in the evening.
Wednesday
 
A 20 percent chance of showers and thunderstorms after 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the morning.
Wednesday Night
 
A 20 percent chance of showers and thunderstorms before 1am. Mostly clear, with a low around 68. Northwest wind 3 to 5 mph.
Thursday
 
Sunny, with a high near 87.
Thursday Night
 
Mostly clear, with a low around 66.
Friday
 
Sunny, with a high near 87.
Friday Night
 
Mostly clear, with a low around 67.
Saturday
 
Sunny, with a high near 90.
Saturday Night
 
Mostly clear, with a low around 72.
Sunday
 
Mostly sunny, with a high near 95.
Sunday Night
 
Mostly clear, with a low around 76.
Monday
 
Mostly sunny, with a high near 95.

 

Forecast from NOAA-NWS for 3 Miles NNW Black Jack MO.

Weather Forecast Discussion
832
FXUS63 KLSX 241917
AFDLSX

Area Forecast Discussion
National Weather Service St Louis MO
217 PM CDT Mon Aug 24 2026

.KEY MESSAGES...
- Seasonably warm temperatures in the 80s will continue this
  week. There is a chance for thunderstorms Wednesday ahead of a
  weak cold front.

&&

.SHORT TERM /THROUGH TUESDAY/...
Issued at 204 PM CDT Mon Aug 24 2026

Today: Surface high pressure was centered over western Illinois
early this morning and is now currently near the Illinois/ Indiana
border. Thunderstorms over Nebraska and Iowa from this morning
have considerably weakened as they move across eastern Missouri.
No precipitation is expected in the St. Louis area, only mid
and high clouds. Temperatures have also been a couple of degrees
cooler today than expected given the widespread cloud cover.
Expect highs to be mostly be in the upper 70s to around 80
degrees.

Tonight: Mid and high cloud debris will start to lose cohesion,
however latest forecast soundings do show pesky 8kft deck
clouds remaining through the overnight hours. The clouds and
retreating high pressure will make lows 10 to 15 degrees warmer
Tuesday morning than was the case this morning (Monday).

Tuesday: Surface high pressure will be located over Ohio as the
closed upper level low south of the James Bay opens up and heads
east. At 850 mb, a warm front will surge northeast with temperatures
surging from 14 degrees C to 18 degrees C. This will translate to
surface highs warming into the mid to upper 80s Tuesday
afternoon.

&&

.LONG TERM /TUESDAY NIGHT THROUGH MONDAY/...
Issued at 204 PM CDT Mon Aug 24 2026

Wednesday: An area of mid level low pressure will move east
across the northern Great Lakes with a cold front approaching
the area from the northwest. In the upper levels of the
atmosphere a dual jet streak will elongate over Iowa, Missouri,
Illinois, and Indiana. The first jet streak appears to be
associated with the long wave trough axis centered across the
central United States, while the second jet streak is rounding
the top of an amplifying ridge over the Rocky Mountains. This is
an interesting setup, as forecast soundings do show some
capping in place with the primary forcing for ascent well
northeast of the area. However, the surface boundary coupled
with the 250 mb jet streak might provide just enough lift for
thunderstorms. The latest run of the NBM has 10 - 20% PoPs
across the area, with LREF PoPs remain consistently higher (50 -
70%). Limiting the QPF on the LREF to 0.05" though reduces the
PoPs to 30 - 40%). Looking at forecast soundings, there is not
only weak capping in place but a skinnier CAPE. This makes the
lower QPF footprint understandable from a ensemble perspective
(most guidance likely not initiating thunderstorms while some
are). Ahead of the cold front, CAPE values rise to around 2000
J/kg, with SFC to 6 km shear values around 30 kt. If updrafts
become robust enough to penetrate the capping inversion and
drier air, locally damage wind gusts and severe hail could be
possible. As such, SPC has our far northeastern zones in a
marginal risk of severe weather.

Thursday - Sunday: The surface cold front from Wednesday will clear
Missouri and Illinois with seasonable temperatures and
dewpoints expected through Friday (no precipitation is
forecast). By Friday, the anticyclonic flow that was over the
Rocky Mountains will start to nudge east. As such, temperatures
are expected to warm back up into the 90s for Saturday and
Sunday. Spread on both the LREF and NBM is around 5 degrees with
the WPC Cluster Analysis showing a good amount of dispersion
between the GEFS, GEPS, and EPS. All of this being said,
precipitation is generally not expected Friday through Sunday
with a gradual warming trend forecast.

&&

.AVIATION /06Z TAFS THROUGH 12Z TUESDAY/...
Issued at 553 AM CDT Mon Aug 24 2026

All TAF sites are currently VFR this afternoon with weakening
showers currently over northeastern Missouri. Latest observed
ACARs soundings shows substantial dry air in the 800 to 900 mb
layer with a rapidly weakening low level jet. As such, no
impacts to the terminals are forecast (except a SCT to BKN 7 - 8
kft deck).

Tonight, surface high pressure will center near the Ohio/
Indiana border with light to variable southeast winds across the
terminals. Cloud cover from this afternoon is forecast to mostly
remain in place which makes the chance of morning fog less
likely.

&&

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

&&

$$

SHORT TERM...BAH
LONG TERM...BAH
AVIATION...BAH
View a Different U.S. Forecast Discussion Location
(In alphabetical order by state)



Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






Contact Us Contact Us Thumbnail | Mobile Mobile Phone Thumbnail
Private Policy | Terms & Conds | Consent Preferences | Cookie Policy
Never base any life decisions on weather information from this site or anywhere over the Internet.
Site is dedicated to our Lord & Savior Jesus Christ | Random Quotes of Jesus

Copyright © 2026 El Dorado Weather, Inc. | Site Designed By:  Webmaster Danny