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St. Joseph, Missouri 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Saint Joseph MO
National Weather Service Forecast for: Saint Joseph MO
Issued by: National Weather Service Kansas City/Pleasant Hill, MO
Updated: 5:41 pm CDT Apr 27, 2026
 
Tonight

Tonight: Mostly cloudy, with a low around 44. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Mostly Cloudy

Tuesday

Tuesday: A chance of showers, mainly between 1pm and 4pm.  Mostly cloudy, with a high near 62. North northeast wind 7 to 9 mph.  Chance of precipitation is 30%.
Mostly Cloudy
then Chance
Showers
Tuesday
Night
Tuesday Night: A slight chance of showers before 7pm.  Mostly cloudy, then gradually becoming mostly clear, with a low around 41. North wind 5 to 8 mph.  Chance of precipitation is 10%.
Slight Chance
Showers then
Mostly Clear
Wednesday

Wednesday: Sunny, with a high near 65. North northwest wind 5 to 7 mph.
Sunny

Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 43. North wind around 6 mph becoming calm  in the evening.
Partly Cloudy

Thursday

Thursday: A slight chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 66. Chance of precipitation is 20%.
Partly Sunny
then Slight
Chance
T-storms
Thursday
Night
Thursday Night: Mostly cloudy, with a low around 42.
Mostly Cloudy

Friday

Friday: Partly sunny, with a high near 64.
Partly Sunny

Friday
Night
Friday Night: Partly cloudy, with a low around 39.
Partly Cloudy

Lo 44 °F Hi 62 °F Lo 41 °F Hi 65 °F Lo 43 °F Hi 66 °F Lo 42 °F Hi 64 °F Lo 39 °F

Hazardous Weather Outlook
 

Tonight
 
Mostly cloudy, with a low around 44. Northwest wind 9 to 16 mph, with gusts as high as 26 mph.
Tuesday
 
A chance of showers, mainly between 1pm and 4pm. Mostly cloudy, with a high near 62. North northeast wind 7 to 9 mph. Chance of precipitation is 30%.
Tuesday Night
 
A slight chance of showers before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 41. North wind 5 to 8 mph. Chance of precipitation is 10%.
Wednesday
 
Sunny, with a high near 65. North northwest wind 5 to 7 mph.
Wednesday Night
 
Partly cloudy, with a low around 43. North wind around 6 mph becoming calm in the evening.
Thursday
 
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 66. Chance of precipitation is 20%.
Thursday Night
 
Mostly cloudy, with a low around 42.
Friday
 
Partly sunny, with a high near 64.
Friday Night
 
Partly cloudy, with a low around 39.
Saturday
 
Sunny, with a high near 70.
Saturday Night
 
Mostly clear, with a low around 47.
Sunday
 
Sunny, with a high near 77.
Sunday Night
 
Partly cloudy, with a low around 52.
Monday
 
Mostly sunny, with a high near 77.

 

Forecast from NOAA-NWS for Saint Joseph MO.

Weather Forecast Discussion
551
FXUS63 KEAX 272310
AFDEAX

Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
610 PM CDT Mon Apr 27 2026

...00Z Aviation Update...

.KEY MESSAGES...

- Main focus for severe weather and heavy rain today is across
  southern and central MO with all hazards (large hail, damaging
  winds, and tornadoes) possible. Non-severe showers and storms
  are possible across northern MO.

- Tonight, a cold front will bring much cooler across the
  region.

- Rest of the week, expect below normal temperatures mostly dry
  conditions. The risk for hazardous weather is very low.

&&

.DISCUSSION...
Issued at 147 PM CDT Mon Apr 27 2026

Today and Tonight, early afternoon satellite imagery and surface
observations showed a cold front passing through the region,
with temperatures in the 50s and northwest wind behind this
front. Meanwhile, ahead of the cold front, temperatures are
near 80F with southwest winds. An outflow boundary from the
early morning storms was laid out west-to-east south of I-70.
The warm, unstable air ahead of the cold front and south of the
outflow boundary will be the focus for showers and thunderstorms
this afternoon. We expect that these storms will be severe, but
most favored area for storms is south and east of the forecast
area, from central Missouri extending toward Illinois. HiRes
guidance shows storm develop in this region early this
afternoon, with Updraft Helicity swaths supporting the
environmental conditions that these storms will indeed be
supercells.

One question regarding severe weather is how long these storms
will remain discrete before congealing into a line. If this
happens more quickly, then the hail and strong tornado threat
transitions more to wind and weak tornadoes. Regardless, the
majority of the storms develop east of the forecast area, so our
severe weather threat is across the southern tiers of counties
from now until late afternoon. Later this evening in the wake of
the cold front, there could be some scattered showers or
thunderstorms, but these will not produce severe weather or
heavy rain. Instead, expect northwest winds with cooler and
drier air moving across the region.

Tuesday through Monday, no hazardous weather is expected at this
time. On Tuesday an upper level wave will bring some rain across
the MO/AR line, but this will lack instability, and the
heaviest rain will be south of the state border. On Wednesday
northwest flow will lead to upper level subsidence and surface
high pressure, meaning light winds and sunny skies. Another weak
wave will move through Thursday bringing low chances (10 to 20
percent) for rain, but any amounts should be less than a quarter
of an inch. Looking ahead, high pressure will remain in control
with dry conditions and light northerly winds on Friday and
Saturday. As the surface high advances toward the Tennessee
River Valley, southerly winds will bring in slightly warmer
temperatures for Sunday into Monday.

&&

.AVIATION /00Z TAFS THROUGH 00Z WEDNESDAY/...
Issued at 607 PM CDT Mon Apr 27 2026

A mix of MVFR and low VFR conditions are expected through the
forecast. For this evening and overnight, generally MVFR is
expected with a period of low/ fuel alternate MVFR ceilings
likely late tonight into tomorrow morning. Ceilings should trend
to low VFR through the late morning and afternoon hours. Gusty
northwesterly winds should linger into the late evening hours
and diminish between 03Z and 06Z.

&&

.EAX WATCHES/WARNINGS/ADVISORIES...
MO...Flood Watch until 7 PM CDT this evening for MOZ011>014-020>024-
     028>030-037.
KS...Flood Watch until 7 PM CDT this evening for KSZ025-102>105.

&&

$$

DISCUSSION...WFO EAX
AVIATION...CDB
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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