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390 FXUS63 KIND 141916 AFDIND Area Forecast Discussion National Weather Service Indianapolis IN 316 PM EDT Sat Jun 14 2025 .KEY MESSAGES... - Flood watch through 10PM for the I-70 corridor and points to the south - Heavy downpours and localized flooding will be the primary threat through this evening - Cold air funnels may be possible today - Active weather pattern next week with daily rain/storm chances - Trending warmer late week with upper 80s likely && .SHORT TERM (This evening through Sunday)... Issued at 315 PM EDT Sat Jun 14 2025 ACARS soundings from KIND show a very moist airmass with PWAT values around 1.90 inches with moderate instability /SBCAPE 1500-2000 J/KG/. Skinny CAPE profiles support meager updraft intensity and therefore not as much lightning in this moist/tropical-like environment except in areas of cell mergers. However, "cold-air" funnels will remain possible this afternoon with the stronger more isolated cells thanks to moderate 3km CAPE /120-150 j/kg/ and decent surface vorticity in the area. The expectation is the synoptic scale boundary and outflow/cell mergers will continue to support a threat for excessive rainfall amounts /2-4 inches/ across portions of central Indiana /generally along and south of I-70/ through the remainder of the afternoon. We have issued a flood watch for this portion of central Indiana until 10 pm EDT. Shower/thunderstorm activity will begin to diminish with some loss of heating and convective overturning occurring across most of the region by late afternoon/early evening. Precipitation chances diminish markedly overnight with diminishing instability. However, forecast soundings support sufficient CAPE to keep isolated convective showers lingering in the SE 1/2 through the early morning hours...with little to no precipitation threat in the NW 1/2 of the forecast area. Drying/subsidence in the mid levels associated with shortwave ridging moving out of the MS valley into the Ohio Valley will limit coverage of any renewed convective development to the far SE portions of Central Indiana during the mid- late afternoon hours. Overnight low temperatures will be slightly above normal thanks to high moisture content with daytime highs on Sunday near normal /lower 80s/ thanks to scattered to broken cloud cover. && .LONG TERM (Sunday night through Saturday)... Issued at 315 PM EDT Sat Jun 14 2025 Sunday night Through Tuesday. By Sunday night the precipitation that will have impacted central Indiana through the weekend will be coming to an end with the low pressure system exiting from the southeast. There will be a brief window of dry time from Sunday night into early Monday before another low pressure system moves in from the southwest, but this precipitation should remain limited to the southern counties as the low remains weak and should track just south of the Ohio River. Some model guidance tries to push the low further north Monday night into early Tuesday, but for now that looks to be the outlier. If the low deepens further than currently expected as the NAM shows, a TROWAL is likely to form with an axis of heavy rain as much as 2-3 inches but again that looks to be on the unlikely side. Temperatures will remain near normal with highs in the low to mid 80s and lows in the mid to upper 60s. Wednesday Through Saturday. A stronger upper level low looks increasingly likely mid to late week with precipitation as early as Wednesday but more likely Thursday as the low moves in from the northwest. Strong southwesterly flow ahead of the low will advect warm and moist air into the area which will allow for another round of moderate to locally heavy rain. There remains timing differences between the deterministic and ensemble guidance, but confidence is highest late Wednesday into Thursday. The flow will then shift northwesterly Friday into the weekend with warming temperatures as the ridge begins to build. Ridge-riding thunderstorms looked likely earlier in the week but models have trended towards a stronger ridge which would keep storm complexes north of the forecast area. && .AVIATION (18Z TAF Issuance)... Issued at 156 PM EDT Sat Jun 14 2025 Impacts: -Low LIFR conditions at KBMG in early morning improving by early afternoon -Thunderstorms later this afternoon at KHUF -Low vis early morning at KHUF with mist dissipating in the early afternoon -Light rain possible later tonight with low vis occurring in the morning with mist dissipating in the late afternoon at KLAF -Possible thunderstorms this evening at KIND along with low ceilings Discussion: - Numerous showers and thunderstorms through much of the weekend - Heavy downpours and localized flooding will be the primary threat through this evening - Cold air funnels may be possible today Scattered showers and thunderstorms possible in the evening with low vis and mist occurring in the early morning. Highest confidence at KHUF, KBMG, and KLAF for low vis conditions clearing out by tomorrow afternoon. All conditions will clear up by tomorrow afternoon. && .IND WATCHES/WARNINGS/ADVISORIES... Flood Watch until 10 PM EDT this evening for INZ045>049-051>057- 060>065. && $$ SHORT TERM...Crosbie LONG TERM...White AVIATION...Kocsis/White