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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: 5:38 pm CDT Apr 25, 2026 |
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Tonight
 Chance T-storms then Chance Showers
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Sunday
 Chance Showers then Chance T-storms
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Sunday Night
 Showers then T-storms
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Monday
 Showers Likely
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Monday Night
 Partly Cloudy
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Tuesday
 Mostly Sunny
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Tuesday Night
 Partly Cloudy
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Wednesday
 Mostly Sunny
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Wednesday Night
 Partly Cloudy
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| Lo 56 °F |
Hi 75 °F |
Lo 62 °F |
Hi 78 °F |
Lo 44 °F |
Hi 64 °F |
Lo 43 °F |
Hi 67 °F |
Lo 43 °F |
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Hazardous Weather Outlook
Tonight
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A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. East southeast wind 6 to 10 mph becoming northeast in the evening. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
Sunday
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A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 75. Southeast wind 7 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
Sunday Night
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Showers and possibly a thunderstorm. Low around 62. South southeast wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible. |
Monday
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Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 78. South southeast wind 13 to 17 mph becoming west in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. |
Monday Night
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Partly cloudy, with a low around 44. West northwest wind 9 to 15 mph, with gusts as high as 25 mph. |
Tuesday
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Mostly sunny, with a high near 64. |
Tuesday Night
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Partly cloudy, with a low around 43. |
Wednesday
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Mostly sunny, with a high near 67. |
Wednesday Night
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Partly cloudy, with a low around 43. |
Thursday
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Partly sunny, with a high near 69. |
Thursday Night
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Mostly cloudy, with a low around 44. |
Friday
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Partly sunny, with a high near 64. |
Friday Night
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Partly cloudy, with a low around 41. |
Saturday
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Sunny, with a high near 71. |
Forecast from NOAA-NWS
for Saint Joseph MO.
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Weather Forecast Discussion
045
FXUS63 KEAX 252330
AFDEAX
Area Forecast Discussion
National Weather Service Kansas City/Pleasant Hill MO
630 PM CDT Sat Apr 25 2026
...00Z Aviation Update...
.KEY MESSAGES...
- An isolated non-severe storm is possible this evening across far
eastern KS into far western Missouri.
- Increasing severe weather threat later in the day on Sunday into
Sunday night. All modes of severe weather are possible.
- Cooler and drier conditions are expected behind a strong cold
front moving through the region mid-day Monday.
&&
.DISCUSSION...
Issued at 308 PM CDT Sat Apr 25 2026
Cold front associated with an occluded low pressure center across
central Canada will continue to slowly push east this afternoon and
evening. Ahead of the front, a weakly unstable atmosphere exists
with increasing low level moisture. There is a fair amount of cloud
cover across central and eastern KS, but still could see a few
showers and thunderstorms develop in the vicinity of the cold front
with 750-1000 J/kg of ML CAPE and weak short wave building east.
CAMs suggest a few of these storms may approach eastern Kansas into
far western Missouri this evening, though the trend has been to
shift timing a bit later in the evening. Severe weather is not
expected with this activity with relatively weak instability.
Sunday, a developing low pressure system in the central Rockies is
expected to lead to increasing southerly winds. As the warm front
noses into the region, increasing shear and instability is expected.
0-6 km bulk shear increases to 30-40 knots west of the warm front
and surface based CAPE increases to 1500-2500 J/kg. Forecast
soundings suggest there is a bit of a cap near 700 mb, but 25-35
knot low level jet developing Sunday evening across the plains may
weaken the cap. Models also suggest a series of short waves moving
across KS that could assist in the development of convection, but
are largely focused after 06Z Monday. The left exit region of the
upper level jet also noses into the region after 06-09Z Monday,
potentially assisting in lift developing across the region. This all
said. That there are multiple triggers but no clear indication on
if/what will get convection going.
Strong cold front is expected to work through the region mid-day
Monday, bringing an end to the potential for storms. Cooler and
drier conditions are expected through much of the remainder of the
week.
&&
.AVIATION /00Z TAFS THROUGH 00Z MONDAY/...
Issued at 630 PM CDT Sat Apr 25 2026
Challenging forecast as moisture lower-level moisture begins to
build into the area tonight and tomorrow. There are low
probabilities for storms late this evening/overnight, depending
on how storms in KS and NE evolve. Have maintained the PROB30
but pushed timing back a few hours. Overnight, there is an
indication that MVFR ceilings will build into the area. Again,
this uncertain at this point and for now is lower probability.
Have added some scattered MVFR ceilings before sunrise given the
uncertainty. Winds seem likely to increase by the afternoon and
become gusty through the end of the forecast. Have added
southeasterly winds of 15-18kts with gusts of 25-28kts. Lastly,
there is a low chance for storms to affect the terminals prior
to the end of this forecast. Right now, the better chances look
to be after 00Z tomorrow so have kept mention out with this
forecast.
&&
.EAX WATCHES/WARNINGS/ADVISORIES...
MO...None.
KS...None.
&&
$$
DISCUSSION...BT
AVIATION...CDB
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