


Area Forecast Discussion
Issued by NWS Quad Cities, IA IL
Issued by NWS Quad Cities, IA IL
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093 FXUS63 KDVN 282344 AFDDVN Area Forecast Discussion National Weather Service Quad Cities IA IL 644 PM CDT Sat Jun 28 2025 .KEY MESSAGES... - Hot and humid weather continues through Sunday. - A threat for storms is expected late in the weekend, with the highest chances from Sunday evening into the overnight period. A few strong to severe storms are possible. - The pattern looks to dry out for the early to middle part of next week. && .SHORT TERM /THROUGH SUNDAY NIGHT/... Issued at 230 PM CDT Sat Jun 28 2025 Through Tonight: A remnant MCV from nocturnal convection last night across portions of South Dakota into southwest Minnesota, was drifting across central to northern portions of the outlook area this afternoon. This feature has been weakening through the day and therefore providing little in the way of lift due to negligible convergence. So far today, there have only been reports of spotty light rain or sprinkles along the Highway 20 corridor. As we head through the late afternoon and evening hours, most of the area will stay dry with a very slight chance for an isolated shower or storm to pop up (less than 15%). Peak heat indices will reach the mid to upper 90s for most of the outlook area, holding below Heat Advisory criteria for any extended period. Continued warm and muggy conditions are expected tonight with lows in the upper 60s to lower 70s. Sunday - Sunday Night: The morning hours may see some isolated to scattered higher based showers that back build into the LLJ axis, but nothing organized. By late morning to mid afternoon, a dry period should be in place as we wait for the incoming front from the northwest. This front is likely to bring an organized line of storms to our north during the day, but will arrive in our area with less certainty. Many CAMs show convection dropping more south/southwest into central Iowa during the afternoon and evening into the primary instability axis, with our area seeing less activity. Have lowered PoPs for Sunday afternoon with highest values across the north and west after 3 PM (20-30%). Better chances for more widespread showers and storms are anticipated Sunday evening into Sunday night (40-70%, highest in the west). With PWATS over 1.75", locally heavy rain amounts will remain possible. Should severe weather take place, damaging winds seem the main threat. SPC has a Level 2 of 5, Slight Risk in our northwest and western counties, with a level 1 of 5, Marginal Risk farther southeast over the remaining CWA Sunday/Sunday night. && .LONG TERM /MONDAY THROUGH SATURDAY/... Issued at 230 PM CDT Sat Jun 28 2025 Monday is a transition day, with cooler air arriving in the afternoon, and passing energy aloft with the upper trof near our area. Some additional showers and thunderstorms remain possible through the day, mainly in the eastern counties. Highs will be a notch cooler, with mid to upper 80s forecast. Tuesday through Wednesday continues to be a dry period within our forecast area as high pressure moves through the region in the wake of the upper trof Monday. However, beyond that period, Thursday through Friday may see some activity as warm air at lower levels builds back into the region, with northwest flow aloft. This will certainly offer a potential for showers and storms later in the week, but little certainty in timing or placement at this point. && .AVIATION /00Z TAFS THROUGH 00Z MONDAY/... Issued at 644 PM CDT Sat Jun 28 2025 VFR conditions prevail through at least Sunday morning, if not through the afternoon hours. Dry air in place will help keep conditions quiet for a while before a cold front moves through the area Sunday evening into Sunday night. Timing of the front remains uncertain, and there is the potential for some daytime thunderstorms to develop, but confidence remains low on the coverage of this activity as the high-res models are spread out in this regard. So, we used PROB30 groups to highlight this afternoon storm threat. && .HYDROLOGY... Issued at 119 PM CDT Sat Jun 28 2025 Forecast crests along portions of the Cedar River have continued trend a bit lower into next week after assessing recent run- off and a dry forecast over at least the next 24 hours. However, additional rounds of heavy rainfall are possible on Sunday and into early next week may result in changes to the timing and magnitude of the forecast crests. The latest river level forecasts are only accounting for forecast rainfall (QPF) over the next 24 hours, again which is mainly dry. With run-off uncertainty, flow attenuation, and the dry forecast through Saturday, will maintain the River Flood Watches for now for the Cedar River at Conesville. Have canceled the watch at Cedar Rapids as that is now forecast to crest a foot below flood stage. Went ahead and issued a flood warning for Marengo. The crest forecast continues to lower and the timing of initial flood conditions were slowed. However, with flood stage forecast in next 24 hrs or so, have gone with the warning. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...None. IL...None. MO...None. && $$ SHORT TERM...Uttech LONG TERM...Ervin AVIATION...Schultz HYDROLOGY...Gibbs/12