Area Forecast Discussion
Issued by NWS Topeka, KS
Issued by NWS Topeka, KS
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278 FXUS63 KTOP 220453 AFDTOP Area Forecast Discussion National Weather Service Topeka KS 1053 PM CST Thu Nov 21 2024 .KEY MESSAGES... - Cool tonight then warming through Sunday. - Cool temperatures return next week with chances for mixed precipitation by late Wednesday. && .DISCUSSION... Issued at 142 PM CST Thu Nov 21 2024 Surface high pressure was centered over the central Plains early this afternoon with local winds much weaker compared to Wednesday. The surface ridge will combine with ridging aloft for quiet weather through Saturday night. Some periods of high clouds should become more common by Friday night with upper flow becoming more zonal with time. Confidence is high in the first widespread hard freeze in a month tonight, but temperatures moderate quickly this weekend with notable warm-air advection Saturday into early Sunday. With northerly low-level trajectories from south Texas by Saturday morning, moderate moisture return may lead to some stratus late Saturday night into Sunday but most solutions keep this cloud thin and still push highs back into the 60s. Dry and relatively warm mid levels will keep convection in check despite a frontal passage later in the day. A modified Canadian airmass takes residence over the region into the early week with zonal flow persisting. There is some agreement in a weak wave passing through around Tuesday though moisture quality is in question and precip chances remain quite low. There is somewhat better agreement among the operational models in a stronger trough passing Wednesday into Thanksgiving Day but these solutions remain quite varied between each other and run to run. Ensemble cluster analysis shows multiple regimes and a rather equal spread between troughing and ridging means so predictability remains low. NBM chance PoPs seem reasonable at this range with some mention of wintry precip for most of the area. && .AVIATION /06Z TAFS THROUGH 06Z SATURDAY/... Issued at 1050 PM CST Thu Nov 21 2024 VFR conditions anticipated with no significant changes from the 00Z forecast. Winds remain light generally from the NW through the morning but then become light and variable by the afternoon and back to a southerly direction by mid to late afternoon. No aviation hazards forecast this period. && .TOP WATCHES/WARNINGS/ADVISORIES... None. && $$ DISCUSSION...Poage AVIATION...Drake