Area Forecast Discussion
Issued by NWS Quad Cities, IA IL
Issued by NWS Quad Cities, IA IL
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518 FXUS63 KDVN 232349 AFDDVN Area Forecast Discussion National Weather Service Quad Cities IA IL 549 PM CST Sat Nov 23 2024 .KEY MESSAGES... - Highs Sunday 8 to 13 degrees above normal. Near normal Monday, then below normal into late week. - One or more systems will be moving through the Midwest during the holiday period (mid week into next weekend). Considerable uncertainty exists regarding the track and potential for any impacts to the area. - The pattern change that occurred last week will remain active through early December. Temperatures will likely (70-90%) be below normal into early December. There is no clear signal that favors above, below, or near normal precipitation, which would more likely be snow with colder temps. && .SHORT TERM /THROUGH SUNDAY/... Issued at 315 PM CST Sat Nov 23 2024 Tonight, light southeast winds and high level clouds will be seen as high pressure drifts east and a low pressure system approaches from the central plains. Some fog is possible along highway 20 mainly mid to late evening into the overnight but confidence is low with light southeast winds increasing enough. Opted not to include in grids. Lows will be nearly steady in the mid and upper 30s. Sunday, the plains low will track over the area. This will usher in seasonable mild temperatures into the area on southwest winds. The gustier winds will be across the southern CWA late morning and early afternoon. As the warm front lifts through, can`t rule out some sprinkles early and then light rain/drizzle. Added some low POPS for light rain generally along and east of the MS River for after sunset into early Monday. Only expect a trace to a few hundredths at best of rain. Highs Sunday were nudged down a bit, but still look on track to be in the upper 40s to near 50 north, to the upper 50s to near 60 south. Normals are in the low to mid 40s. && .LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/... Issued at 315 PM CST Sat Nov 23 2024 Monday and Tuesday, a high pressure ridge will traverse the area with mainly dry conditions. A cold front will be east of the area early Monday with brisk NW winds increasing through the day while ushering in much colder air. Temperatures won`t see much improvement on Monday, with steady or slowly falling readings in the mid 30s NW to low to mid 40s along and E of the river. Some lingering slight chances for light rain are in the NE Monday morning, and east for the afternoon. Tuesday looks to be quiet and chilly with below normal highs mostly in the 30s, as surface to mid level ridging dominates. Winds will be light west northwest with sunshine giving way to some increase in clouds. The Thanksgiving Holiday time frame remains a focus and potential time for precipitation, but there is still a lot of uncertainty. Through collaboration, bumped up POPS for Wednesday into Thanksgiving as some models hint at an fgen band initially Tuesday night into Wednesday across the north. Then, with a southern system tracking across MO which brings in precip chances across the SE two thirds of the CWA. With placement and timing differences, the end POPS are just slight to low chance (20-30%) with diurnally-driven precip types, snow versus rain. At this time, WPC has QPF focused south of the area, with the CWA remaining dry. Will need to monitor this due to the travel day and expect changes as we get closer. Beyond, confidence remains high on turning much colder and well below normal at the end of November and beginning of December. && .AVIATION /00Z TAFS THROUGH 00Z MONDAY/... Issued at 549 PM CST Sat Nov 23 2024 VFR conditions start off the TAF period, with BKN high cirrus clouds overhead. The main focus for tonight continues to be on fog potential for areas north of Highway 30, including the DBQ TAF terminal. Latest models suggest a little later time frame for fog development than previously expected, with the possibility of some IFR visby reductions late tonight, so have made adjustments to capture this. Additionally, strengthening low-level flow aloft will support low-level wind shear at BRL, which is indicated by both the NAM and RAP models. Otherwise, expect southeasterly flow during the daylight hours Sunday, with continued VFR clouds. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...None. IL...None. MO...None. && $$ SHORT TERM...14 LONG TERM...14 AVIATION...Schultz