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Lafayette, Indiana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Lafayette IN
National Weather Service Forecast for: Lafayette IN
Issued by: National Weather Service Indianapolis, IN
Updated: 6:45 pm EDT Jun 28, 2025
 
Tonight

Tonight: Patchy fog after 5am.  Otherwise, mostly clear, with a low around 70. West wind around 5 mph becoming calm  in the evening.
Mostly Clear
then Patchy
Fog
Sunday

Sunday: Isolated showers and thunderstorms after 3pm.  Areas of fog before 8am.  Otherwise, mostly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon.  Chance of precipitation is 20%.
Areas Fog
then Isolated
T-storms
Sunday
Night
Sunday Night: A 40 percent chance of showers and thunderstorms, mainly after 2am.  Mostly cloudy, with a low around 71. South southeast wind around 5 mph becoming calm  in the evening.
Chance
T-storms
Monday

Monday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am.  High near 84. South southwest wind 5 to 8 mph.  Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely then
Showers
Monday
Night
Monday Night: Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am.  Low around 67. West wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers then
Chance
Showers
Tuesday

Tuesday: Sunny, with a high near 83. West northwest wind 3 to 7 mph.
Sunny

Tuesday
Night
Tuesday Night: Mostly clear, with a low around 64. Light west wind.
Mostly Clear

Wednesday

Wednesday: Mostly sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Mostly Sunny

Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 66. Calm wind.
Partly Cloudy

Lo 70 °F Hi 88 °F Lo 71 °F Hi 84 °F Lo 67 °F Hi 83 °F Lo 64 °F Hi 85 °F Lo 66 °F

Hazardous Weather Outlook
 

Tonight
 
Patchy fog after 5am. Otherwise, mostly clear, with a low around 70. West wind around 5 mph becoming calm in the evening.
Sunday
 
Isolated showers and thunderstorms after 3pm. Areas of fog before 8am. Otherwise, mostly sunny, with a high near 88. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 20%.
Sunday Night
 
A 40 percent chance of showers and thunderstorms, mainly after 2am. Mostly cloudy, with a low around 71. South southeast wind around 5 mph becoming calm in the evening.
Monday
 
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 8am. High near 84. South southwest wind 5 to 8 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
Showers and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Low around 67. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
Sunny, with a high near 83. West northwest wind 3 to 7 mph.
Tuesday Night
 
Mostly clear, with a low around 64. Light west wind.
Wednesday
 
Mostly sunny, with a high near 85. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
 
Partly cloudy, with a low around 66. Calm wind.
Thursday
 
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Calm wind becoming west around 5 mph in the afternoon.
Thursday Night
 
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Independence Day
 
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 87.
Friday Night
 
A 10 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
 
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.

 

Forecast from NOAA-NWS for Lafayette IN.

Weather Forecast Discussion
635
FXUS63 KIND 281838
AFDIND

Area Forecast Discussion
National Weather Service Indianapolis IN
238 PM EDT Sat Jun 28 2025

.KEY MESSAGES...

- A few showers and storms into early this evening

- Patchy fog with locally dense fog early Sunday

- Scattered daily afternoon and evening showers/t-storms Sunday and
  Monday; isolated strong wind gusts are possible as well as
  localized flooding

- Drier and slightly cooler weather expected for the middle of next
  week before more humid conditions return Friday into next weekend

&&

.SHORT TERM (This Evening through Sunday)...
Issued at 238 PM EDT Sat Jun 28 2025

Ample diurnal cu field remains over the forecast area early this
afternoon and although dewpoints remain in the lower to mid
70s...temperatures are running cooler for the afternoon than they
have in 8 days with most locations in the mid and upper 80s as of
18Z. Convection has largely remained to our south and east so far
this afternoon but have noticed some enhancement to cu on recent
satellite imagery and there does appear to be a few tiny showers
trying to form.

The remnants of the frontal boundary moving slowly away to the east
and lingering moisture and instability will keep the threat for a
few storms around into this evening before the forecast area can
enjoy a brief break as drier air and weak high pressure pass by to
the north through the Great Lakes. As that passes by however...
moisture will advect back into the region from the southwest on
Sunday with a return to the recent pattern of afternoon and evening
scattered convection.

There appears to be some form of weak convergence zone extending
along I-70 west from Ohio across the forecast area and back into
south central Illinois. While the deepest moisture has already
shifted to near and south of the Ohio River...this convergence zone
may serve as a focal point for the convective development locally
over the next few hours as it drifts south. Convection will be
entirely dependent on available instability and moisture as shear is
nonexistent. A few cells may become strong enough to generate gusty
winds but the setup favors locally heavy downpours from slow moving
convection that will remain disorganized and challenged to maintain
intensity for any extended length of time. Will maintain scattered
pops until near sunset before precip chances end as slightly drier
air advects in from the north.

Cannot rule out a stray shower overnight into early Sunday morning
across far southern portions of the forecast area in closest
proximity to the deeper plume of moisture. As winds go near calm and
skies gradually clear...fog is likely to develop and may be locally
dense in spots.

As mentioned above this will be short lived as deeper moisture
returns back into the southern half of the forecast area as early as
after daybreak Sunday and gradually expanding north through the day.
There is a subtle upper level wave that combined with the deeper
moisture as PWATS climb back to 2 inches or higher that should
contribute to greater convective coverage by the afternoon focused
especially near and south of the I-70 corridor. Shear remains
virtually nil with convection moving slowly leading to locally
torrential downpours.

Temps...the 90 degree streak will break for most locations today and
low level thermals support highs remaining in the mid to upper 80s
on Sunday as well...aided by increase cu coverage and scattered
convection. Lows tonight will range from the upper 60s to lower 70s.

&&

.LONG TERM (Sunday Night through Saturday)...
Issued at 238 PM EDT Sat Jun 28 2025

Unsettled weather will continue for the early part of the week as
the combination of an upper level wave and a cold front sweep across
the Great Lakes and Ohio Valley. Once these features pass Tuesday
morning...a drier and slightly cooler airmass will build in courtesy
of broad surface high pressure and drier northwest flow aloft. Upper
level ridging will return by late next week with a likely return to
isolated to scattered diurnal convection both Friday and Saturday as
a more unstable airmass reestablishes across the Ohio Valley.

Monday and Monday Night..

The arrival of the aforementioned upper level wave with the front
and a poorly organized surface low will bring the best threat for
rain and storms throughout the extended on Monday and Monday night.
A few stronger storms are possible Monday afternoon and evening but
mitigating factors will be weak boundary layer shear and overall
poor lapse rates through the column. More than likely...torrential
rainfall and localized flooding will be the primary threats yet
again from convection along with lightning serving as a deterrent to
outdoor activities. PWATs will rise above 2 inches and storms will
be slow moving. Gusty winds are possible as downdrafts collapse
courtesy of heavy precipitation loading with the influx of rich deep
moisture.

Convection will linger Monday night before diminishing by Tuesday
morning as the front moves away to the east. Highs on Monday will
primarily reach the mid 80s with lows Monday night falling into the
mid and upper 60s as drier air begins to filter in from the west as
the front shifts east.

Tuesday through Saturday...

Mostly quiet weather conditions are increasingly expected as the day
progresses Tuesday...continuing through Thursday as high pressure
settles across the region. Dewpoints will finally fall back into the
lower and middle 60s and perhaps even down into the upper 50s in
northern portions of the forecast area for midweek...providing a
break from the recent stretch of oppressive conditions. Highs will
slide back into the mid 80s Tuesday and Wednesday before beginning
to rise on Thursday.

The arrival of ridging aloft coinciding with a weakening of the
surface high will enable deeper moisture to advect back into the
Ohio Valley by Friday with growing confidence in higher dewpoint air
at or above 70 degrees making a return for the holiday into next
weekend. Instability will increase in response with both Friday and
Saturday likely to see isolated to scattered pulse intensity...short
lived and slow moving convection develop during the afternoon and
evening. Highs will creep back up to around 90 for Friday and
Saturday.

&&

.AVIATION (18Z TAF Issuance)...
Issued at 1231 PM EDT Sat Jun 28 2025

Impacts:

- Isolated to scattered thunderstorms this afternoon and evening,
  focused largely south of I-70

- Patchy fog tonight, perhaps dense in spots

Discussion:

Much of the high level clouds have diminished early this
afternoon...replaced by a developing diurnal cu field. The cu will
drift south through late day as drier air advects south. Isolated to
scattered convection will again develop over the next few hours
focused largely across the southern half of central Indiana. KBMG is
the terminals with the greatest chance to be impacted but there are
hints at isolated activity as far north as the I-70 corridor through
early evening which could impact KHUF or KIND as well. For
now...coverage is not expected to be great enough to warrant a
mention in the forecast but will monitor and update as needed. Much
of the convection will be diurnally driven and will dissipate near
sunset.

Light to calm winds and eventually clearing skies overnight late
tonight may promote fog development...and locally dense fog is not
out of the question. Will carry MVFR fog with a BCFG mention near
daybreak Sunday at the outlying sites. Fog will diminish quickly
Sunday morning with establishment of diurnal cu again by midday as
deeper moisture lifts back north across the area. Isolated to
scattered convection will be possible again Sunday afternoon with
the potential at greater coverage than anticipated this afternoon.

Winds will generally be less than 10kt through the period.

&&

.IND WATCHES/WARNINGS/ADVISORIES...None.

&&

$$

SHORT TERM...Ryan
LONG TERM...Ryan
AVIATION...Ryan
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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