Boone, Iowa 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for 3 Miles WSW Boone IA
National Weather Service Forecast for:
3 Miles WSW Boone IA
Issued by: National Weather Service Des Moines, IA |
Updated: 2:05 am CDT Jul 25, 2025 |
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Overnight
 Patchy Fog
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Friday
 Chance Showers and Patchy Fog then Chance T-storms
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Friday Night
 T-storms Likely
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Saturday
 Chance T-storms
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Saturday Night
 Mostly Clear
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Sunday
 Sunny
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Sunday Night
 Mostly Clear
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Monday
 Sunny
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Monday Night
 Mostly Clear
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Lo 69 °F |
Hi 84 °F |
Lo 69 °F |
Hi 87 °F |
Lo 72 °F |
Hi 93 °F |
Lo 74 °F |
Hi 93 °F |
Lo 72 °F |
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Hazardous Weather Outlook
Overnight
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Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 69. Light north northeast wind. |
Friday
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A 40 percent chance of showers and thunderstorms after 11am. Patchy fog between 7am and 8am. Otherwise, mostly cloudy, with a high near 84. Calm wind becoming east northeast around 6 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms. |
Friday Night
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Showers and thunderstorms likely, mainly between 1am and 4am, then showers likely and possibly a thunderstorm after 4am. Mostly cloudy, with a low around 69. Southeast wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible. |
Saturday
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A 30 percent chance of showers and thunderstorms, mainly before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 87. South southeast wind around 7 mph becoming west southwest in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms. |
Saturday Night
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Mostly clear, with a low around 72. South southeast wind 3 to 5 mph. |
Sunday
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Sunny, with a high near 93. |
Sunday Night
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Mostly clear, with a low around 74. |
Monday
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Sunny, with a high near 93. |
Monday Night
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Mostly clear, with a low around 72. |
Tuesday
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A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 91. |
Tuesday Night
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A 40 percent chance of showers. Partly cloudy, with a low around 68. |
Wednesday
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A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 81. |
Wednesday Night
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A 30 percent chance of showers. Mostly cloudy, with a low around 62. |
Thursday
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Partly sunny, with a high near 77. |
Forecast from NOAA-NWS
for 3 Miles WSW Boone IA.
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Weather Forecast Discussion
545
FXUS63 KDMX 250402
AFDDMX
Area Forecast Discussion
National Weather Service Des Moines IA
1102 PM CDT Thu Jul 24 2025
...Updated for the 06z Aviation Discussion...
.KEY MESSAGES...
- Showers and thunderstorms possible over far southern Iowa
late this afternoon into the evening. Heavy rainfall is the
primary concern, but gusty winds are also possible.
- Additional showers and storms expected late Friday into
Saturday, mainly over southern into central Iowa. This
rainfall could exacerbate conditions and lead to
flooding/flash flooding in areas that saw heavy rain last
night or tonight.
- Hot and humid conditions develop Sunday and Monday.
&&
.DISCUSSION...
Issued at 240 PM CDT Thu Jul 24 2025
Rainfall has all but subsided over the area early this afternoon,
although radar does indicate a few weak returns near the
Iowa/Missouri border. This area will be where additional
thunderstorm development is anticipated this afternoon and evening
as another weak wave orbits the broad upper ridging. This will bring
a stream of warm, moist south southwesterly flow upgliding over the
boundary in place over central to northern Missouri. As has been the
theme this year, these storms will exist in a moisture rich
environment, with an axis of 2.2 to 2.4 inch PWATs just to the south
of the state. This, in conjunction with mean storm motions roughly
parallel to the boundary, will bring prolonged heavy rainfall
starting late this afternoon into the evening. Model QPF shows
anywhere from 2 to 4 inches within the heaviest band and some
isolated pockets over 4 inches. placement of this heavier
rainfall axis will be primarily south of the state and into
Missouri, mainly impacting those in the far southern Iowa
counties along the Iowa/Missouri border. That said, models have
been less than reliable this year, so not ruling out a
regression to yesterday`s runs which had storms (and coincident
rainfall) slightly farther north into southern Iowa, especially
as the low level jet ramps up overnight. Fortunately, southern
Iowa didn`t see near the rainfall amounts from last nights
precipitation as those farther north, so this should help
mitigate hydrological impacts for at least tonight. Likewise,
the better instability axis also seems to be displaced to the
south with minimal deep layer shear in place. Therefore, the
overall severe threat appears low.
Any showers and thunderstorms still lingering tomorrow morning
should generally diminish as the LLJ diminishes into the morning
hours. However, another, slightly more prominent wave of energy will
lift northeastward into the state again tomorrow, pushing the
boundary farther north into the state. This will bring yet another
chance for both heavy rainfall and stronger storms into the forecast
area tomorrow afternoon through the overnight. From a moisture
perspective, the environment tomorrow night won`t be too
dissimilar from today/tonight, but may include a slightly
stronger moisture transport component. The key difference
between tonight and tomorrow lies with the 25 to 35 kt LLJ nosed
up into southern to south central Iowa, as opposed to a more
west to east orientation tonight. This will provide a steady
stream of moisture and forcing through the night, prolonging the
amount of time rain is falling, especially in far southern
Iowa. The main concern will be a cumulative effect of heavy rain
tonight which would be exacerbated by more heavy rainfall
tomorrow in areas where rain fell on both nights. Southern Iowa
would be the area most likely to see heavy rain both nights, but
is also the area with the driest soils relative to the rest of
the state. This should help raise the bar for flash flooding and
river flooding, but two nights of 2 to 4+ inch rainfall would
still likely create some issues, especially in areas that
achieve the higher end of that range on either night. Model
guidance is showing a signal for isolated pockets of 6 to 8
inches of total rainfall by Saturday morning, mostly over
northern Missouri and far southern Iowa.
Of similar concern, tomorrow`s rainfall will reach farther north
into the state than tonight`s, which poses a risk to areas that are
already experiencing elevated river levels from last night`s
rainfall in northern Iowa. As implied earlier, models have been
following a southerly trend, which is in the right direction to
avoid worsening conditions across the north, but still something to
keep an eye on. This is especially true in areas in central to north
central Iowa where water will be routing into and additional
rainfall is more of a possibility.
Finally, in addition to the heavy rainfall, not going to rule out
the potential for a few stronger storms on the nose of the low level
jet Friday night into Saturday. The storm prediction center
currently has the area in a general thunderstorm outlook with
minimal risk for severe weather, likely due to the lower CAPE values
and marginal deep layer shear. However, could certainly still see
some gusty winds overnight as any heavier cores collapse.
Friday night activity lingers into Saturday morning, then diminishes
through the day as an elevated mixed layer begins to leak in from
the west behind the wave. This will help to negate convection on
Saturday, although may see a few diurnally driven storms in the east
before those warmer 850 mb to 700 mb temperatures arrive aloft. This
elevated mixed layer (700 mb temperatures > 12C) remains overhead
Sunday into Monday, which will help to limit convective activity
through the end of the weekend and into early next week; bringing a
much needed break from the rain. Of course, this time of year you
trade one thing for another, as the warm temperatures aloft will
translate down to hot temperatures at the surface. Similarly, while
the atmosphere is capped off, our stream of surface moisture still
continues at the surface. This, in conjunction with moist soils and
corn evapotranspiration, will produce hot and humid conditions
Saturday and Sunday, pushing forecasted heat indices over 105F
areawide. Assuming this forecast remains on track tomorrow, heat
headlines will be needed for at least Sunday and Monday.
&&
.AVIATION /06Z TAFS THROUGH 06Z SATURDAY/...
Issued at 1059 PM CDT Thu Jul 24 2025
VFR conditions to begin the period. Stratus and possibly fog is
expected to develop though the target region is currently under
cirrus deck from thunderstorm anvil blow off from Missouri.
MVFR to local IFR cigs could develop. Some vsby lowering in fog
may occur but again clouds do make this a less confident
forecast. Thunderstorm potential is trending southward and at
this time only included at KOTM late in the period. The wind is
light and variable overnight and turning southeast and still
light on Friday.
&&
.DMX WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
DISCUSSION...Dodson
AVIATION...Donavon
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