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Terre Haute, Indiana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for 2 Miles W Terre Haute IN
National Weather Service Forecast for: 2 Miles W Terre Haute IN
Issued by: National Weather Service Indianapolis, IN
Updated: 2:45 am EDT Aug 15, 2025
 
Overnight

Overnight: Patchy fog before 3am, then patchy fog after 5am.  Otherwise, mostly clear, with a low around 68. Calm wind.
Patchy Fog

Friday

Friday: Patchy fog before 9am.  Otherwise, sunny and hot, with a high near 91. Light and variable wind.
Patchy Fog
then Mostly
Sunny
Friday
Night
Friday Night: Mostly clear, with a low around 72. Calm wind.
Mostly Clear

Saturday

Saturday: Sunny and hot, with a high near 93. Heat index values as high as 102. Calm wind.
Hot

Saturday
Night
Saturday Night: Mostly clear, with a low around 73. Calm wind.
Mostly Clear

Sunday

Sunday: Sunny and hot, with a high near 95. Calm wind.
Hot

Sunday
Night
Sunday Night: Mostly clear, with a low around 74. Calm wind.
Mostly Clear

Monday

Monday: Sunny and hot, with a high near 95. Calm wind.
Hot

Monday
Night
Monday Night: Partly cloudy, with a low around 74. Calm wind.
Partly Cloudy

Lo 68 °F Hi 91 °F Lo 72 °F Hi 93 °F Lo 73 °F Hi 95 °F Lo 74 °F Hi 95 °F Lo 74 °F

 

Overnight
 
Patchy fog before 3am, then patchy fog after 5am. Otherwise, mostly clear, with a low around 68. Calm wind.
Friday
 
Patchy fog before 9am. Otherwise, sunny and hot, with a high near 91. Light and variable wind.
Friday Night
 
Mostly clear, with a low around 72. Calm wind.
Saturday
 
Sunny and hot, with a high near 93. Heat index values as high as 102. Calm wind.
Saturday Night
 
Mostly clear, with a low around 73. Calm wind.
Sunday
 
Sunny and hot, with a high near 95. Calm wind.
Sunday Night
 
Mostly clear, with a low around 74. Calm wind.
Monday
 
Sunny and hot, with a high near 95. Calm wind.
Monday Night
 
Partly cloudy, with a low around 74. Calm wind.
Tuesday
 
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 93. Calm wind becoming west southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Tuesday Night
 
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Wednesday
 
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 88.
Wednesday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Thursday
 
Mostly sunny, with a high near 86.

 

Forecast from NOAA-NWS for 2 Miles W Terre Haute IN.

Weather Forecast Discussion
001
FXUS63 KLOT 150524
AFDLOT

Area Forecast Discussion
National Weather Service Chicago/Romeoville, IL
1224 AM CDT Fri Aug 15 2025

.KEY MESSAGES...

- Uncomfortable heat and humidity returns this weekend with heat
  indices 95 to 105 degrees. Storms/outflow could disrupt heat
  for some, particularly near the lake/NE Illinois.

- Threat for strong thunderstorms increases Friday night and
  into early next week, though there will be several periods of
  dry time.

&&

.UPDATE...
Issued at 812 PM CDT Thu Aug 14 2025

Well defined shortwave trough is moving eastward across the
middle-upper Mississippi Valley this evening. Have bumped up sky
cover in the grids some tonight to account for the encroaching
mid-level deck pushing eastward into northwest IL. There have
been a few sprinkles, but sfc obs have basically all been clear
below 12,000 ft, so these have been some very high based
sprinkles.

Farther west across central Iowa, last light visible satellite
imagery did show some more vertical growth to the high based
convection with some isolated showers. These showers are forming
in an area of mid level warm air advection near the base of a
strong elevated mixed layer. Guidance suggests that this mid
level warm air advection will weaken tonight as it grows
increasingly divorced from the departing shortwave trough. In
addition to the weakening mid level WAA, this activity will be
encountering a more stable (weaker mid level lapse rates) and
drier air mass as it tried to cross the Mississippi into IL.
There is a substantial west-east moisture gradient east of the
Mississippi River, with much drier air mass noted in recent MDW
ACARS soundings vs DVN 00z RAOB.

All of this to say, that no big changes planned with evening
forecast update other than bumping sky cover up some. Dry
forecast still looks to be on track.

- Izzi

&&

.DISCUSSION...
Issued at 319 PM CDT Thu Aug 14 2025

A mid-level shortwave impulse over IA early this afternoon will
shift eastward across northern IL tonight. It appears unlikely
that this disturbance will result in any precipitation over our
area tonight, though an increase in mid and higher level cloud
cover is likely through the evening. Otherwise, expect another
seasonably cool night tonight, with lows generally in the 60s.

Heat and humidity will be returning to the area into the weekend
as upper-level ridging begins to build back over the Midwest.
Warming conditions will commence on Friday as the surface flow
turns southerly and fosters warming inland temperatures into the
low 90s Friday afternoon. The one expectation to these very warm
temperatures on Friday will be areas along the northeastern IL
lakeshore, where an onshore wind component through the day will
keep conditions several degrees cooler. Dew points are also
expected to gradually increase into the upper 60s to low 70s
through the afternoon, which will foster afternoon heat indices
topping out in the 95 to 100 range across interior sections of
northern IL.

An increasing belt of westerlies will set up across the Upper
Midwest Friday night into Saturday along the northern periphery
of the roughly 594 dam 500 mb high building over the Mid
Mississippi Valley into the weekend. Unfortunately, the evolution
of this pattern will place our region in an area favorable for
convection at times Friday night through the weekend. There is
certainly going to be a good amount of dry time this weekend, so
it will not be a "wash out" by any means. However, with some
periods of convection and the associated outflow possible in and
near our area, the temperature (and heat index) forecast has a
large bust potential this weekend, particularly on Sunday across
northern/northeastern IL.

Our first round of showers and thunderstorms could come late
Friday night into Saturday morning. Forecast guidance continues
to support a southwesterly low-level jet over the Upper Midwest
impinging upon a conditional unstable airmass across northeastern
IA, and adjacent areas of western WI and southeastern MN Friday
night. Any thunderstorms that develop in the regime will be
favored to dive east-southeasterly along the thickness gradient,
which points right into our area. With this in mind, we have opted
to add some low end 20-30% chances for storms late Friday night
into Saturday morning. Strong gusty winds may accompany these
storms into far northern IL, and this has prompted the SPC to
increase a level 1 of 5 severe weather threat into far northern IL
Friday night.

The impacts these early morning storms and outflow have on
temperatures on Saturday remains to be seen. At this time, have
opted not to change temperatures or heat indices on Saturday, with
the expectation that the airmass will recover through the
afternoon. However, if cloud debris hangs on longer then
expected, peak afternoon heat indices on Saturday may not reach
the currently advertised 100-105 degree readings.

The signal in the medium range guidance continues to support the
potential for additional rounds of showers and thunderstorms
into, or very near, northern IL Saturday night through early early
next week as our area remains along the northern periphery of the
500 mb high. Again, there will be several periods of dry weather
through this period. However, the moist and very unstable airmass
will be supportive of instances of strong showers and
thunderstorms with instances of strong wind gusts and heavy
rainfall.

Temperatures and heat index values on Sunday will be largely
dependent upon the coverage of this convection and its associated
outflow. Accordingly, confidence in the temperature and heat index
forecast for Sunday is of low confidence at this time,
particularly over northern IL. However, in areas that remain
removed from the more widespread convection, heat indices are
likely to climb in excess of 100 degrees Sunday afternoon. At the
present time, this seems to be most favored for areas south of
I-80.

A synoptic cold front will eventually push through the entire
region, but this may not take place until Tuesday night into
Wednesday which will keep off-and-on thunderstorm chances going
in the region. In the wake of this cold front, there`s a strong
signal in the guidance suite for cooler conditions in the region
during the middle and end of next week.

KJB

&&

.AVIATION /06Z TAFS THROUGH 12Z SATURDAY/...
Issued at 1224 AM CDT Fri Aug 15 2025

Main Concerns:

- Lake breeze wind shift likely at MDW and GYY in the mid to
  late afternoon, reaching ORD in the ~00z-01z timeframe.

- Low chance of TSRA moving across the terminals late
  tonight/early Saturday.

With fairly light south-southwesterly winds aloft during the
daytime hours today, expect south-southwest surface winds to
remain generally below 10 kt. Also due to the lighter winds
aloft, a lake breeze should push slowly but steadily inland this
afternoon. Introduced a wind shift at MDW (east-southeast) and
GYY (east-northeast) at 21z. Confidence in the boundary reaching
ORD during the afternoon is low, with a better chance it occurs
around or after 00z this evening.

There`s a 20% or less (too low for inclusion in the TAFs)
chance for TSRA to develop upstream and push across the area
toward and after 06z Saturday. Aside from this lower end but
certainly worth monitoring potential, VFR conditions will
prevail through the current TAF period. Cumulus clouds with
bases at 5-6kft AGL are expected to develop inland of the lake
breeze late this morning into the afternoon. Any 5-6kft clouds
above the Illinois shore at the start of the air show practice
today should clear out once the lake breeze pushes inland.

Castro

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...None.
IN...None.
LM...None.

&&

$$

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