Expires:No;;374753 FXUS63 KPAH 252351 AFDPAH Area Forecast Discussion National Weather Service Paducah KY 651 PM CDT Thu Apr 25 2024 .KEY MESSAGES... - Warm and breezy conditions with multiple chances of showers and thunderstorms are forecast through the next week. - South winds will gust up to 30 mph Saturday, and 30-40 mph Sunday. - The most widespread rains are expected late Sunday through Monday evening. - Severe storms are possible mainly over southeast Missouri and southern Illinois Friday afternoon and night and again late Sunday into Sunday night. && .UPDATE... Issued at 650 PM CDT Thu Apr 25 2024 Updated aviation discussion for 00Z TAFs. && .DISCUSSION... Issued at 346 PM CDT Thu Apr 25 2024 A ridge of high pressure aloft will quickly pass over the Quad State this evening, and then southwest flow will set in through the weekend. A pair of storm systems will lift northeast from the central plains through the upper Mississippi Valley through the period. The first will make its run tonight through Friday, and the second will run Sunday into Sunday night. A warm front will lift through the Quad State Friday, and then the active surface boundary will set up well west of the Quad State through the period. This will lead to rather stout southerly flow over our region through the weekend. An area of light rain is pushing slowly eastward across southeast Missouri this afternoon. It will struggle to get past the Mississippi River and is expected to diminish into the evening. Warm, moist advection ahead of the first storm system will bring an area of mainly light showers northeast across the Quad State late tonight into Friday morning. A rumble of thunder cannot be ruled out, but the odds are very low. Most of the region will be in the warm sector by the end of the day Friday. Some isolated to scattered convection is possible over southeast Missouri and southern Illinois in the afternoon and Friday night. Neither instability or wind shear is impressive, but a few strong to severe storms cannot be ruled out. This would be most likely over southeast Missouri. The entire area will be in the warm sector through the weekend. A few showers and storms will be possible mainly over southeast Missouri and southern Illinois Saturday afternoon and evening. Temperatures will climb well into the 80s on Saturday and south winds will gust 25-35 mph at times. The strongest winds will be over southeast Missouri and southern Illinois. Saturday night will be dry across the region, and the south winds will continue. This will lead to a very mild night with lows in the middle and upper 60s. Much, if not, all of Sunday will be dry, as south winds gust 30-45 mph and temperatures climb well into the 80s again. There is potential for gusts to climb above 40 mph, so a Wind Advisory may become necessary. In the wake of the Sunday system, the upper flow will become more westerly, which will push a band of convection slowly eastward across the region from late Sunday or Sunday night through Monday and possibly into Monday evening. Some of the initial storms that reach southeast Missouri and southern Illinois Sunday afternoon or evening could be severe. Once again instability is limited, although shear will likely be greater than on Friday. We will need to keep a close eye on the severe potential for Sunday afternoon and night. Heavy rainfall may be a bigger concern as the band of convection slowly moves across the region Sunday night and especially Monday. However, WPC QPF at this time maxes out with 1-2" over southeast Missouri and tapers down to a half inch in the far east. We will remain in southerly surface flow as we dry out Monday night into Tuesday, but the flow aloft will become nearly zonal. A storm system moving eastward into the Great Lakes will finally push a cold front through the Quad State Tuesday night into Wednesday. Of course, this will come with a good chance convection. The NBM, as per normal, has PoPs spread out through the week, due to uncertainties in timing of the front. Latest guess is that Tuesday and next Thursday should be dry. Temperatures will remain well above normal through Wednesday and then drop back toward normal behind the front for next Thursday. && .AVIATION /00Z TAFS THROUGH 00Z SATURDAY/... Issued at 650 PM CDT Thu Apr 25 2024 Warm advection processes will result in a gradual lowering of ceilings overnight into the low VFR range by Friday morning. A few light showers may impact southern and western portions of the area (KCGI/KPAH) this evening and tonight. This will spread into northern and eastern portions of the area (KEVV/KOWB/KMVN) late tonight into Friday morning. Thunder is most probable at KMVN, but even there, chances are too low to include in the TAF at this time. A break in the activity is anticipated by Friday afternoon, but scattered showers and thunderstorms may move back into portions of southeast Missouri and southern Illinois by late afternoon. Light east winds tonight will become southeast Friday morning, then shift to the south at 10 to 15 knots with gusts of 20 to 25 knots Friday afternoon. && .PAH WATCHES/WARNINGS/ADVISORIES... IL...None. MO...None. IN...None. KY...None. && $$ UPDATE...RJP DISCUSSION...DRS AVIATION...RJP