Area Forecast Discussion
Issued by NWS Kansas City/Pleasant Hill, MO
Issued by NWS Kansas City/Pleasant Hill, MO
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280 FXUS63 KEAX 160533 AFDEAX Area Forecast Discussion National Weather Service Kansas City/Pleasant Hill MO 1233 AM CDT Mon Sep 16 2024 .KEY MESSAGES... - Low chance (15-25%) for an isolated shower or storm this afternoon and again on Monday for areas east of Highway 65. - Slight chances for showers and storms Wednesday and Thursday across eastern Kansas and western Missouri with better chances (30-50%) for more widespread precipitation coming Friday into the weekend. - Temperatures remain 5-10 degrees above normal through Friday. && .DISCUSSION... Issued at 205 PM CDT Sun Sep 15 2024 A closed upper low, including the remnants of Francine, continues to wobble across the lower Mississippi Valley this afternoon with a longwave trough over the western CONUS. Diurnal heating has eroded the capping inversion leading to a growing cumulus field. Ascent is rather weak, but weak forcing associated with a westward progressing lobe of energy could be sufficient to produce a few isolated showers and storms this afternoon. MUCAPE of 1500-2000 J/kg, but weak shear favors up-and-down pulse thunderstorms which could produce brief heavy rainfall and gusty winds. Any convection will wane with sunset this evening. Clear skies and light surface winds overnight supports the development of patchy fog, but elevated winds just off the surface should limit this to low-lying areas and river valleys. Similar conditions to today are expected on Monday as the western trough amplifies and a tropical system moves inland across the Carolinas. In between, mid-level ridging builds over the Central Plains with highs again in the 80s. Weak ascent in an uncapped environment could produce a few isolated showers/storms Monday afternoon across central Missouri, but lack of shear will once again limit intensity of these storms. The mid-level ridge moves overhead for Tuesday, leading to dry conditions before the western trough takes on a negative tilt as it ejects across the Rockies and Northern Plains late Tuesday into Wednesday. While the main forcing will reside well north and west of the local area, subtle perturbations in the southwesterly flow could spark periodic showers and storms across eastern Kansas and western Missouri Wednesday and Thursday. Higher chances (30-50%) for more widespread precipitation come Friday into the weekend as a closed low approaches from the west and shunts a cold front toward the area. Temperatures remain 5-10 degrees above normal through Friday with highs in the 80s and lows in the 60s. && .AVIATION /06Z TAFS THROUGH 06Z TUESDAY/... Issued at 1229 AM CDT Mon Sep 16 2024 VFR conds will prevail thru this TAF cycle as just a few-sct high clouds are expected thru the pd. Winds will be out of the SE around 05kts before increasing to around 10kts with ocnl gusts to 15-20kts btn 17Z-00Z. Aft 00Z, winds will weaken and diminish to 5-10kts while remaining out of the SE. && .EAX WATCHES/WARNINGS/ADVISORIES... MO...None. KS...None. && $$ DISCUSSION...73 AVIATION...73