textproduct: Indianapolis
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
KEY MESSAGES
- Ongoing flooding will continue this morning
- A few showers are possible this afternoon and again Saturday
- Better chances for rain return Sunday into Monday
- Below normal temperatures will continue for much of the period
DISCUSSION (Today through Wednesday)
Issued at 301 AM EDT Thu Jun 18 2026
Early This Morning...
Convection will continue across the southern forecast area where instability remains but will be slowly weakening. Severe storm threat should end before 08Z as the leading edge of the convection sinks south of central Indiana, limiting the inflow of storms to the north. Threat will transition to flooding with repeated rounds of storms moving through. Current thoughts are that by the end of the Flood Watch valid time, most areas will have transitioned to ongoing flood advisories/warnings, so will let it expire.
Today...
By 12Z rain should be south of the forecast area, so will start the day off dry. However, some additional upper forcing will move through this afternoon and could generate some sprinkles or a few showers. Will have some slight chance PoPs across portions of the southern half or so of the forecast area this afternoon.
Highs will be in the lower to middle 70s north to around 80 south. There is some uncertainty with these numbers as cloud cover with the afternoon sprinkles/showers may keep readings down.
Tonight and Friday...
High pressure will build in and bring quiet weather to the area during this period. Below normal temperatures will continue with lows in the 50s tonight and highs mainly in the 70s Friday.
Saturday...
A weak system in northwest flow will bring some forcing to the area on Saturday. However, moisture will be limited. Will have some slight chance PoPs with this system. Below normal readings in the middle 70s to around 80 will continue for high temperatures.
Sunday and Monday...
An upper level wave and surface low pressure system will move through the area during this time. There remains some questions in timing of these, but for now it appears that the highest PoPs will be Sunday night. This system may be able to tap into some moisture and bring near an inch of rain.
Tuesday and beyond...
High pressure will try to keep the area dry mid-week next week, but some upper energy may try to squeeze out a few showers around Wednesday. Temperatures will continue to be below normal for much of the area.
AVIATION (12Z TAF Issuance)
Issued at 621 AM EDT Thu Jun 18 2026
Impacts:
- Wind gusts around 20kt this afternoon
Discussion:
VFR conditions are expected through the period.
Mid and high clouds will increase again today. A few light showers are possible this afternoon, mainly at KIND/KHUF. Used VCSH for these. Clouds will scatter out this evening.
Winds will gust to around 20kt this afternoon before diminishing by early evening.
IND WATCHES/WARNINGS/ADVISORIES
None.
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