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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: 10:36 pm CDT Aug 8, 2025
 
Tonight

Tonight: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after 5am.  Partly cloudy, with a low around 72. South southeast wind 9 to 11 mph, with gusts as high as 22 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms
Saturday

Saturday: A 50 percent chance of showers and thunderstorms.  Partly sunny, with a high near 84. South wind 7 to 9 mph becoming east northeast in the afternoon.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms
Saturday
Night
Saturday Night: Showers and thunderstorms likely, mainly between 1am and 4am, then showers likely and possibly a thunderstorm after 4am.  Mostly cloudy, with a low around 68. East northeast wind 3 to 6 mph.  Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
T-storms
Likely
Sunday

Sunday: A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall.  Partly sunny, with a high near 85. Calm wind becoming south southeast around 6 mph in the morning.  New rainfall amounts between three quarters and one inch possible.
Heavy Rain
Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a low around 65. South southeast wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Showers
Likely
Monday

Monday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm.  Partly sunny, with a high near 81. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
Showers
Monday
Night
Monday Night: A 20 percent chance of showers and thunderstorms before 1am.  Partly cloudy, with a low around 63.
Slight Chance
T-storms
Tuesday

Tuesday: Mostly sunny, with a high near 83.
Mostly Sunny
Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 63.
Partly Cloudy
Lo 72 °F Hi 84 °F Lo 68 °F Hi 85 °F Lo 65 °F Hi 81 °F Lo 63 °F Hi 83 °F Lo 63 °F

Flood Watch
 

Tonight
 
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 72. South southeast wind 9 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Saturday
 
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84. South wind 7 to 9 mph becoming east northeast in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
 
Showers and thunderstorms likely, mainly between 1am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 68. East northeast wind 3 to 6 mph. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Sunday
 
A 50 percent chance of showers and thunderstorms. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 85. Calm wind becoming south southeast around 6 mph in the morning. New rainfall amounts between three quarters and one inch possible.
Sunday Night
 
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. South southeast wind around 6 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Monday
 
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 63.
Tuesday
 
Mostly sunny, with a high near 83.
Tuesday Night
 
Partly cloudy, with a low around 63.
Wednesday
 
Sunny, with a high near 85.
Wednesday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Thursday
 
Mostly sunny, with a high near 87.
Thursday Night
 
Mostly clear, with a low around 69.
Friday
 
Sunny, with a high near 89.

 

Forecast from NOAA-NWS for Ames IA.

Weather Forecast Discussion
413
FXUS63 KDMX 082353
AFDDMX

Area Forecast Discussion
National Weather Service Des Moines IA
653 PM CDT Fri Aug 8 2025

 ...Updated for the 00z Aviation Discussion...

.KEY MESSAGES...

- Active period this weekend with heavy rain and severe weather
  potential.

- Flash Flood Watch for very heavy rain potential Saturday
  afternoon through Monday morning. The primary periods are
  Saturday night and Sunday night.

&&

.DISCUSSION...
Issued at 309 PM CDT Fri Aug 8 2025

A very active forecast remains for this weekend and into early next
week. Surface low pressure over Nebraska with a boundary extending
northward into northern Minnesota where another weak low pressure is
located. That boundary will settle into northwest Iowa overnight and
will eventually stall over Iowa as the upper level flow becomes
southwesterly, hanging up the parallel boundary below it.

Deciphering the potential for thunderstorms late tonight into
Saturday morning still isn`t straight forward as the elevated mixed
layer (EML) may hold much of the night but there are a couple signs
that convection may occur above the EML late tonight. The 700 mb
temperatures of 13-15C will certainly hold surface based convection
at bay but those temperatures do cool overnight. May get some weak
elevated convection with the low level jet and surges of theta-e
advection passing across the state. The EML will begin to erode late
tonight and the instability axis will move into the state and that
may lead to thunderstorm development late tonight into Saturday.
While locally heavy rain and a strong storm may occur with this
early activity, the overall threat is lower compared to other
periods this weekend. A greater potential for thunderstorm
development in vicinity of the boundary over central Iowa is
expected sometime from late Saturday afternoon and into the evening
hours. Again a few strong to severe storms will be possible but the
highest threat is the potential for heavy to very heavy rainfall
with storm motions nearly parallel to the boundary leading to the
potential for training of storms. Low and mid level moisture
advection will maximize Saturday night into central and south
central Iowa while warm cloud depths increase to near 15 kft.
Rainfall rates of 2 to 3 inches per hour may occur. Backbuilding of
storms is possible as well which would further the training
potential. For this reason, in collaboration with WPC, a moderate
risk for Excessive Rainfall has been issued for Saturday/Saturday
night in addition to Sunday/Sunday night. The Sunday period
inclusion is due to the potential for a repeat performance though
due to potential outflow influences, the boundary may settle a bit
more south than where the heavy rain axis sets up the previous
period. Will continue to monitor this period for severe weather
potential also, but again, the primary threat appears to by the
heavy rain potential and the greatest concern periods are during the
nocturnal hours.

Storm potential persists into early next week as the southwest flow
into Iowa will persist until the primary upper level short wave
arrives late Tuesday into Wednesday. The exact location of the
surface boundary is more uncertain as guidance is trending southward,
which makes sense given the aforementioned impacts on the boundary by
storms and outflow above.

&&

.AVIATION /00Z TAFS THROUGH 00Z SUNDAY/...
Issued at 653 PM CDT Fri Aug 8 2025

Upper to mid level cloud cover will continue to track into the
state, with conditions largely expected to remain VFR. Expecting
showers and storms to develop after 06z with chances mainly
over northern Iowa in the morning, with PROB30 groups remaining.
The certainty on track and timing for storms is less certain
further south, so direct mention remains out of KDSM and KOTM.
Regardless, on and off storms are possible at all sites later in
the morning through the evening but will depend on how the
morning activity tracks. A very close eye will remain on these
details. Otherwise, winds will lighten overnight tonight,
gradually shifting across the state and becoming more varied in
direction with the frontal passage.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for IAZ004-005-015-
023-024-033>039-044>050-057>062-070>075-081>086-092>097.
Flood Watch from Saturday afternoon through Monday afternoon
for IAZ037>039-048>050-059>062-072>075-082>086-093>097.

&&

$$

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






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