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Oskaloosa, Iowa 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Oskaloosa IA
National Weather Service Forecast for: Oskaloosa IA
Issued by: National Weather Service Des Moines, IA
Updated: 6:29 pm CDT Jun 16, 2025
 
Tonight

Tonight: Partly cloudy, with a low around 69. South southwest wind around 7 mph.
Partly Cloudy

Tuesday

Tuesday: A 50 percent chance of showers and thunderstorms, mainly after noon.  Partly sunny, with a high near 87. Southwest wind around 8 mph becoming northwest in the afternoon.  New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
Chance
T-storms
Tuesday
Night
Tuesday Night: Showers and thunderstorms, mainly before 4am, then showers and possibly a thunderstorm after 4am.  Low around 66. North northwest wind 5 to 8 mph becoming south southeast after midnight.  Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
T-storms

Wednesday

Wednesday: Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm.  High near 81. East northeast wind 9 to 11 mph becoming west southwest in the morning. Winds could gust as high as 20 mph.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers

Wednesday
Night
Wednesday Night: Mostly clear, with a low around 61. Northwest wind 6 to 10 mph.
Mostly Clear

Juneteenth

Juneteenth: Sunny, with a high near 86.
Sunny

Thursday
Night
Thursday Night: A 20 percent chance of showers and thunderstorms after 1am.  Mostly clear, with a low around 66.
Mostly Clear
then Slight
Chance
T-storms
Friday

Friday: Sunny, with a high near 91. Breezy.
Sunny then
Sunny and
Breezy
Friday
Night
Friday Night: Mostly clear, with a low around 75. Breezy.
Mostly Clear
then Mostly
Clear and
Breezy
Lo 69 °F Hi 87 °F Lo 66 °F Hi 81 °F Lo 61 °F Hi 86 °F Lo 66 °F Hi 91 °F Lo 75 °F

Hazardous Weather Outlook
 

Tonight
 
Partly cloudy, with a low around 69. South southwest wind around 7 mph.
Tuesday
 
A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 87. Southwest wind around 8 mph becoming northwest in the afternoon. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
 
Showers and thunderstorms, mainly before 4am, then showers and possibly a thunderstorm after 4am. Low around 66. North northwest wind 5 to 8 mph becoming south southeast after midnight. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Wednesday
 
Showers and possibly a thunderstorm, mainly before 1pm, then a chance of showers and thunderstorms after 1pm. High near 81. East northeast wind 9 to 11 mph becoming west southwest in the morning. Winds could gust as high as 20 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
 
Mostly clear, with a low around 61. Northwest wind 6 to 10 mph.
Juneteenth
 
Sunny, with a high near 86.
Thursday Night
 
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 66.
Friday
 
Sunny, with a high near 91. Breezy.
Friday Night
 
Mostly clear, with a low around 75. Breezy.
Saturday
 
Sunny, with a high near 94. Breezy.
Saturday Night
 
Clear, with a low around 76.
Sunday
 
Sunny, with a high near 94. Breezy.
Sunday Night
 
Mostly clear, with a low around 75. Breezy.
Monday
 
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 92. Breezy.

 

Forecast from NOAA-NWS for Oskaloosa IA.

Weather Forecast Discussion
838
FXUS63 KDMX 162331
AFDDMX

Area Forecast Discussion
National Weather Service Des Moines IA
631 PM CDT Mon Jun 16 2025

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

.KEY MESSAGES...

- Scattered strong to severe thunderstorms this evening.
  Damaging wind gust and hail are the main hazards.

- Periods with thunderstorms, some strong will continue into
  Tuesday night and early Wednesday.

- Areas with heavy rainfall also likely through Wednesday with
  the focus shifting south into central and southern Iowa.

- Turning hot and humid late week and into the weekend.

&&

.DISCUSSION...
Issued at 243 PM CDT Mon Jun 16 2025

Storms are still ongoing over parts of the northeast county warning
area including near Waterloo. This convection has been moving slowly
east/southeast since earlier this morning as it fired along an
outflow boundary from overnight storms. A few of the storms have
been strong and near severe and they are beginning to have stronger
cold pools associated with them, as indicated by the the 20+ degree
drop in temperatures. Wind gusts have responded as well with a few
gusts of 40 to 55 mph now being recorded. These storms have also
produced rainfall amounts of 1-2 inches. A pseudo boundary has setup
also as a result of the storms with south/southwest wind and
temperatures in the mid 80s mainly south of Highway 20 to near
Waterloo to Fort Dodge then arcing northwest into Minnesota.

The convective allowing models (CAMs) have not performed well today
and outside the HiRes ARW, the remainder of the CAMs have combined
for a near zero batting average on this mornings convection and the
new convection firing over southeast South Dakota along the primary
cold front. The lack of consistency with the CAMs and the turned
over air north and the pseudo boundary a bit south, the confidence
on the evolution of storms going into this evening is lower than
normal. Once potential outcome is the storms over southeast South
Dakota become rooted and then travel southeast along the pseudo
boundary where and instability axis is situated and eventually move
into central Iowa this evening. Otherwise, it could be a waiting
game for the development of an MCS over Nebraska mid to late
evening, though that system should turn southeast. The main cold
front will move into Iowa tonight and stall somewhere over central
Iowa. That will eventually become the focus for storm development
overnight or through the day Tuesday. The triple point will move
into should move into south central Iowa late Tuesday into Tuesday
night which may bring the tornado threat into the state.

Heavy rain potential will remain through Wednesday. The strongest
moisture advection will remain just south of Iowa but PWATs in
excess of 2" will be over Iowa at times from late Tuesday into early
Wednesday. Warm cloud depths by Tuesday night will be approaching 13
kft so efficient warm rain processes and slow storm motions will
lead to areas with heavy rainfall. At this point, much of the heavy
rain has been over northern Iowa. That focus should shift south into
central and southern Iowa. Will continue to monitor the situation as
several streams are running above normal.

After the short wave passage on Wednesday, 500 mb heights will be on
the increase and a transition to a very warm and humid pattern will
occur. High temperatures in the 90s with dew points in the 70s at
times will be the warmest weather so far this year. Eventually the
upper flow will undergo another transition late weekend into early
next week with a large upper high developing to the east and and
upper low to the west and southwest upper flow into Iowa. One period
to watch is Thursday night as this transition occurs as an MCS could
develop over Minnesota and drop southeast into Iowa. Otherwise, the
next convective chances, barring the presence of a stout enhanced
mixed layer (EML), will be next week, which may be stormy at times
after a lull late week and into the weekend.

&&

.AVIATION /18Z TAFS THROUGH 18Z WEDNESDAY/...
Issued at 631 PM CDT Mon Jun 16 2025

Lower confidence forecast with guidance not handling the current
picture well, but in the near term have timed out storms to FOD
as well as MCW with a PROB30 for storm potential. Will have to
monitor trends through the evening and make AMD as needed.
An uptick in shower and storm chances is expected Tuesday
afternoon and for now have advertised as prolonged SHRA/TSRA at
the terminals.

&&

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

&&

$$

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






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