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St. Joseph, Missouri 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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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: 11:53 am CDT Apr 28, 2026 |
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This Afternoon
 Chance Showers
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Tonight
 Partly Cloudy
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Wednesday
 Sunny
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Wednesday Night
 Mostly Clear
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Thursday
 Partly Sunny then Slight Chance T-storms
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Thursday Night
 Mostly Cloudy
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Friday
 Mostly Sunny
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Friday Night
 Partly Cloudy
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Saturday
 Sunny
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| Hi 62 °F |
Lo 41 °F |
Hi 65 °F |
Lo 43 °F |
Hi 67 °F |
Lo 40 °F |
Hi 64 °F |
Lo 39 °F |
Hi 68 °F |
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Hazardous Weather Outlook
This Afternoon
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A chance of showers, mainly before 3pm. Partly sunny, with a high near 62. North northeast wind around 8 mph. Chance of precipitation is 30%. |
Tonight
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Partly cloudy, with a low around 41. North northwest wind 5 to 8 mph. |
Wednesday
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Sunny, with a high near 65. Northwest wind 5 to 8 mph. |
Wednesday Night
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Mostly clear, with a low around 43. North northwest wind around 5 mph becoming calm in the evening. |
Thursday
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A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 67. Calm wind becoming west northwest 5 to 9 mph in the morning. Chance of precipitation is 20%. |
Thursday Night
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Mostly cloudy, with a low around 40. |
Friday
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Mostly sunny, with a high near 64. |
Friday Night
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Partly cloudy, with a low around 39. |
Saturday
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Sunny, with a high near 68. |
Saturday Night
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Mostly clear, with a low around 45. |
Sunday
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Sunny, with a high near 77. |
Sunday Night
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Partly cloudy, with a low around 51. |
Monday
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Mostly sunny, with a high near 78. |
Forecast from NOAA-NWS
for Saint Joseph MO.
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Weather Forecast Discussion
397
FXUS63 KEAX 281744
AFDEAX
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
1244 PM CDT Tue Apr 28 2026
.KEY MESSAGES...
- Chance for showers this afternoon, with greater chances
(50-70%) towards southern MO.
- Cooler temperatures and quieter conditions overall, with
scattered chances for precipitation near the end of the
forecast period.
&&
.DISCUSSION...
Issued at 330 AM CDT Tue Apr 28 2026
Quieter weather will persist through the overnight and into the
morning. Presently, the upper level trough is situated west of
the Hudson Bay, as the shortwave that triggered our recent round
of severe weather lifts off towards the Great Lakes. Surface
high pressure will maintain northerly winds, and help drier,
cooler conditions prevail in the short term. Going into the
afternoon, a passing surface low and it`s associated shortwave
trough will reinvigorate precipitation in southern MO. Low-
level moisture transport will be mitigated through the day by
surface high pressure promoting advection of drier air through
the forecast area, keeping higher chances (50-70%) of
showers/storms further south. However, greater upper level
moisture transport broadly encompassing central/northern MO and
broad-scale lift ahead of the shortwave will push slight chances
(10-30%) of precipitation further north through the day. In
addition to this, instability will greatly remain further south
than our forecast area, minimizing the potential for severe
storms during the day. However, some rumbles of thunder are
still possible with whatever instability is able to generate in
the atmosphere during the day.
After today, the upper level trough is progged to dig down
towards the Great Lakes. As this trough propagates and
eventually stalls over the Great Lakes behind an amplified ridge
over the Atlantic, it will place us under a generally
north/northwesterly flow regime for the next few days. This will
help keep our temperatures cooler and conditions drier to close
out what has been a very active past month. Embedded shortwaves
within the broader upper level pattern will invigorate slight
chances (10-20%) of precipitation Thursday afternoon along a
convergent boundary. This blocking pattern in the upper-levels
will persist, with amplified shortwave ridging and surface high
pressure building into our area as the upper level trough
wobbles eastward with momentum from a passing shortwave trough.
This will help keep conditions dry over the weekend. Another
series of disturbances in the flow will invigorate low-end
chances for precipitation to end out the forecast period, aided
by southerly surface flow transporting warmer, moister air from
the south as the surface high traverses east. Increased model
divergence at this point decreases overall confidence in
precipitation during this period, however.
&&
.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1235 PM CDT Tue Apr 28 2026
MVFR CIGs should lift through the early afternoon. However,
confidence in VFR CIGs occurring by 18Z at KMCI, KMKC, and
KIXD is low, so have opted for a TEMPO group to capture the
clearing trend. A few showers have also formed in eastern KS,
which may impact KMCI, KMKC, and KIXD over the next couple of
hours. Once the showers clear the area and CIGs improve, VFR
conditions are expected through the remainder of the TAF period
with northerly winds around 5-10 kts.
&&
.EAX WATCHES/WARNINGS/ADVISORIES...
MO...None.
KS...None.
&&
$$
DISCUSSION...SPG
AVIATION...Carothers
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