416 FXUS63 KDVN 012258 AFDDVNArea Forecast Discussion National Weather Service Quad Cities IA IL 558 PM CDT Wed Oct 1 2025
.KEY MESSAGES...
- The message remains the same, above normal temperatures look to continue into the weekend along with generally dry weather.
- Low chance for rainfall remains in the forecast for Sunday night into Monday with a slow moving cool front. Confidence remains low on the aspect if there will be enough available moisture for this feature to produce much of any rainfall.
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.SHORT TERM /THROUGH THURSDAY NIGHT/... Issued at 215 PM CDT Wed Oct 1 2025
Tonight...The area to continue on the left flank of main omega upper ridge lobe, and some MO RVR upper level troffiness into Thursday. We should just continue to have mid and high level cloudiness tonight with east to southeast sfc winds of 5-10 MPH. These conditions support the loaded NBM low temps of mid to upper 50s.
Thursday...The weak upstream upper troffiness mentioned above will look to unsettle more overhead, and expect the ambient CU, mid and high level clouds seen now acrs the west half of IA and the MO RVR Valley to be over the local area tomorrow. We may even get a few RADAR returns in the thicker AC like what`s going on out to the west, but with ongoing dry low to mid levels expect precip to stay aloft/virga. The loaded NBM high temps are in the mid to upper 80s with more of a southerly wind, but some worry the NBM values may be too warm if we get heavier mid and upper level cloud cover. The next upper ridge/thermal lobe starts adjust north and expand up the plains Thu night, and locally we should have more of a southerly sfc wind component. Milder low temps in the upper 50s to lower 60s into Friday morning.
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.LONG TERM /FRIDAY THROUGH WEDNESDAY/... Issued at 215 PM CDT Wed Oct 1 2025
Friday through Sunday...Latest ensembles continue to nudge broad warm upper ridge acrs the region for unseasonable warm/hot temps most of this period. A lot of upper 80s to near 90 and not that far off of record highs at most of the climate sites both Saturday and Sunday. South to southwesterly sfc winds mixing out to 10-20+ MPH by midday and ongoing dry conditions/low RH`s may mean some enhanced fire danger these days(Sat & Sun) especially in unharvested crop fields.
Blocked pattern still looks to be acted upon by building long wave upper trof acrs the western into the north central CONUS Sunday into Monday. Associated sfc cool front aligned parallel under the trof`s leeside southwesterlies will slowly progress and get shunted in from the west-northwest Sunday night into Monday, and that`s when the next precip chance window occurs mainly in anafront form. Moisture return and feed into this feature still looks marginal and lacking a more optimum source region, thus amount and coverage of any showers for late Sunday night and Monday still uncertain.
Monday and Tuesday...The passing front, clouds and precip will also play havoc with temp possibilities on Monday, and the loaded NBM could be way off on the mild side. Also some signs the front may stall or go quasi-stationary acrs the area into Tuesday until more upper jet energy and troffiness digs down out of Canada and acrs the Upper MS RVR Valley. Early to mid next week currently appears to be trending cooler and with higher precip chances looking to occur through Tuesday, before post-frontal sfc ridging dumps down out of Canada and produces even cooler conditions backdoor style for next Wednesday.
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.AVIATION /00Z TAFS THROUGH 00Z FRIDAY/... Issued at 557 PM CDT Wed Oct 1 2025
VFR conditions to prevail through the period, with decreasing high clouds. Light easterly winds will turn southerly Thursday afternoon.
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.DVN WATCHES/WARNINGS/ADVISORIES... IA...None. IL...None. MO...None.
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SHORT TERM...12 LONG TERM...12 AVIATION...Gross
NWS DVN Office Area Forecast Discussion