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Ames, Iowa 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Ames IA
National Weather Service Forecast for: Ames IA
Issued by: National Weather Service Des Moines, IA
Updated: 2:36 pm CDT Jul 15, 2025
 
This
Afternoon
This Afternoon: Sunny, with a high near 89. South wind around 9 mph.
Sunny

Tonight

Tonight: A 40 percent chance of showers and thunderstorms, mainly after 4am.  Increasing clouds, with a low around 69. South southeast wind around 6 mph.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Mostly Clear
then Chance
T-storms
Wednesday

Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 7am.  Partly sunny, with a high near 82. South wind 5 to 9 mph becoming west northwest in the afternoon.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms

Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 1am, then a slight chance of showers.  Mostly cloudy, with a low around 57. North northwest wind around 9 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
Thursday

Thursday: Partly sunny, with a high near 74. North wind 7 to 9 mph.
Partly Sunny

Thursday
Night
Thursday Night: Partly cloudy, with a low around 57.
Partly Cloudy

Friday

Friday: A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm.  Partly sunny, with a high near 79. Chance of precipitation is 20%.
Mostly Sunny
then Slight
Chance
T-storms
Friday
Night
Friday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 67.
Slight Chance
T-storms then
Chance
T-storms
Saturday

Saturday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 86.
Chance
T-storms

Hi 89 °F Lo 69 °F Hi 82 °F Lo 57 °F Hi 74 °F Lo 57 °F Hi 79 °F Lo 67 °F Hi 86 °F

Hazardous Weather Outlook
 

This Afternoon
 
Sunny, with a high near 89. South wind around 9 mph.
Tonight
 
A 40 percent chance of showers and thunderstorms, mainly after 4am. Increasing clouds, with a low around 69. South southeast wind around 6 mph. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
A 40 percent chance of showers and thunderstorms, mainly after 7am. Partly sunny, with a high near 82. South wind 5 to 9 mph becoming west northwest in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
A chance of showers and thunderstorms before 1am, then a slight chance of showers. Mostly cloudy, with a low around 57. North northwest wind around 9 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
 
Partly sunny, with a high near 74. North wind 7 to 9 mph.
Thursday Night
 
Partly cloudy, with a low around 57.
Friday
 
A slight chance of showers between 1pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 79. Chance of precipitation is 20%.
Friday Night
 
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 67.
Saturday
 
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Saturday Night
 
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Sunday
 
A 30 percent chance of showers. Partly sunny, with a high near 83.
Sunday Night
 
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Monday
 
Partly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Ames IA.

Weather Forecast Discussion
617
FXUS63 KDMX 152013
AFDDMX

Area Forecast Discussion
National Weather Service Des Moines IA
313 PM CDT Tue Jul 15 2025

.KEY MESSAGES...

- Warm and humid conditions continue today, cooler temperatures
  in the 70s on Thursday.

- Storm chances return to western Iowa late tonight (overnight)
  into Wednesday morning. A few strong storms possible with
  gusty winds the primary threat. Conditional threat for
  additional strong storms later Wednesday into Wednesday night,
  especially south, but will depend on morning activity.

- Drier to end the week before additional storm chances return
  at times into the weekend.

&&

.DISCUSSION...
Issued at 256 PM CDT Tue Jul 15 2025

Another warm and humid afternoon is ongoing with temperatures in the
80s and dew points in the 60s to 70s resulting in heat indicies in
the upper 80s to upper 90s across the area. Flow out of the south to
southwest will continue to bring in moisture off the Gulf into
Wednesday morning ahead of the approaching low-level low which will
be moving through southern MN through the daytime Wednesday dragging
a cold front with it through the state into Wednesday evening.

Attention first is on the developing convection in Nebraska this
afternoon into evening which will progress eastward towards the
Missouri River into late tonight, maintained in NE by a 30-40 knot
LLJ. The overall parameter space into our far western CWA will make
it difficult for storms to stay in balance with current thinking in
line with previous and recent CAM trends of decaying convection
moving into western Iowa near to after midnight before any lingering
activity continues to push eastward into early Wednesday morning.
Although can`t completely rule out a strong storm as the line
initially enters our far western CWA, overall expecting any storms
to be sub-severe. For any strong storms that can maintain into
western Iowa, strong wind gusts are the primary threat followed by
locally heavy rain, though activity should be progressive enough to
limit the hydro threat overall, especially after several dry days
now.

What remains uncertain is the coverage and timing of the decaying
storm activity into central Iowa and beyond which has significant
implications on the any storm development later in the day
Wednesday. The aforementioned cold front will be drifting southward
through the area through the day and setting up somewhere near the
IA/MO border into Wednesday afternoon. Pending any other lingering
outflow boundaries/mesoscale details after the morning activity,
this is likely where additional development will occur during the
afternoon to evening but this boundary in CAMs is anywhere from
south central Iowa into northern Missouri making it difficult to
pinpoint at this range where the better storm threat is. As noted
yesterday, the better shear lags behind the boundary even though
instability blossoms in the warm sector south of the front. There
remains enough of a favorable environment for a few strong to severe
storms develop in the afternoon to evening, especially over southern
Iowa, if not further south, but at this point remains conditional on
frontal location, amount of early day clearing, and any other
mesoscale details. The primary threat will remain strong wind gusts
and locally heavy rainfall once again, though the potential
placement of rain over southern Iowa is also the area which can take
the most amount of rain given antecedent conditions and continuing
maturing crops. The LLJ is not as robust on Wednesday night into
Thursday, but may help maintain some rain/storms over far southern
Iowa into the night before clearing into Thursday morning.

High pressure drifts into and through the area later Thursday into
Friday with cooler temperatures moving in behind the frontal passage
as well. This will bring some pleasant days to end the week with
temperatures in the 70s to low 80s. Active weather returns late
Friday into the weekend, however, with multiple additional chances
for showers and storms at times. Details remain uncertain at this
range, but will continue to monitor trends.


&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 1242 PM CDT Tue Jul 15 2025

VFR conditions ongoing and expected to continue through much of
the night. Scattered diurnal cu will diminish tonight but clouds
will be on the increase west to east late tonight into early
Wednesday. Shower/storm chances also increase in western Iowa
near to after 06Z but confidence in showers/storms maintaining
to most sites too low at this time to include any precip
mentions overnight except at KFOD. Started with shower mentions
for KFOD with uncertainty as well in strength of activity as it
reaches the terminal. Additional showers/storms possible after
the overnight activity into Wednesday morning (and again
afternoon/evening) but coverage and timing remain far too
uncertain to address at this time. Some gusty winds out of the
south this afternoon will decrease tonight with winds shifting
to be out of the west to northwest ahead to behind the passing
boundary Wednesday.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...05
AVIATION...05
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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