Area Forecast Discussion
Issued by NWS Paducah, KY
Issued by NWS Paducah, KY
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256 FXUS63 KPAH 040736 AFDPAH Area Forecast Discussion National Weather Service Paducah KY 236 AM CDT Sat May 4 2024 .KEY MESSAGES... - Warm temperatures continue this weekend and through the bulk of next week. Humidity levels slowly uptick as well. - An unsettled weather pattern takes shape with scattered showers and storms this weekend becoming more widespread by the middle of the week. Heavy rainfall and strong storm chances gradually increase by mid week as well. - A cool off with lower humidity returns spring like temperatures and dew points late next week. && .DISCUSSION... Issued at 230 AM CDT Sat May 4 2024 A dense fog advisory is in effect for much of the area, but nighttime microphysics satellite imagery shows there is a deck of lower clouds that is inhibiting the more widespread development of dense fog attm. We`ll continue monitoring trends thru daybreak before making any headline decisions. The upper flow pattern is generally zonal this weekend with a few nuances noted. One is that H5 heights do increase about 30-40 meters, which may contribute to the collaborated push to go lower than what has been running as too hot on the pops via the NBM, at least thru the bulk of the weekend. The other is that there is an open wave the models pick up on by late weekend, which begins to lift across SEMO by Sunday night, resulting in a pop uptick more like what the NBM shows. This heralds the beginning of a more active period that yields fairly robust daily pops with a warm/unstable air mass to play with. The wave lifts across the FA Monday while dampening somewhat, but does spread the higher pops in west-to-east fashion with its move across the FA. A relative pause Monday night occurs as a teleconnected ridge moves overhead in the wake of the aforementioned wave`s departure, just before pops juice up again in earnest for the mid week, as a broad long wave trof churns into our neck of the woods from the High Plains. This pattern plays out and really amps up with increasing shear and instability coming into play by Days 4-5. We`re juiced up then too, pushing summer time readings with mid-upper 80s highs and dew points near 70. Breezy southerlies Tuesday-Wednesday will offer non thunderstorm gust potential to around 30 mph, and keep the warmth/moisture inputs on the column. In general, all our storms/storm chances will have locally heavy rainfall potential. WPC outlooks MRGNL risk for exceeding FFG until spiking it into the SLGT category basically overtop our FA/the TN Valley Wednesday. And while an isolated strong storm before then cannot be ruled out, that`s when strong-severe storm chances spike as well. The broader long wave trof will make its passage toward the end of the week and when it does...it ushers in some cooler/drier air that will be most welcomed by then. && .AVIATION /06Z TAFS THROUGH 06Z SUNDAY/... Issued at 230 AM CDT Sat May 4 2024 Patchy dense fog and low clouds may restrict CIGS/VSBYS to LIFR/IFR at times during the pre dawn hours. Otherwise anticipate dispersion to occur with and after daybreak, as SCT-BKN bases and VSBYS improve to Visual Flight Rules. There will be a non zero chance for diurnal destabilization producing a shower or thunderstorm, but chances are low enough to preclude terminal mention at this writing. && .PAH WATCHES/WARNINGS/ADVISORIES... IL...Dense Fog Advisory until 9 AM CDT this morning for ILZ075>077- 080>094. MO...Dense Fog Advisory until 9 AM CDT this morning for MOZ076-086- 087-100-107>112-114. IN...None. KY...Dense Fog Advisory until 9 AM CDT this morning for KYZ001>009. && $$