Area Forecast Discussion
Issued by NWS Kansas City/Pleasant Hill, MO
Issued by NWS Kansas City/Pleasant Hill, MO
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131 FXUS63 KEAX 031124 AFDEAX Area Forecast Discussion National Weather Service Kansas City/Pleasant Hill MO 624 AM CDT Mon Jun 3 2024 .KEY MESSAGES... - Scattered showers and thunderstorms are possible today, but storms should remain sub-severe. - A more well defined chance of thunderstorms is expected tomorrow evening along a cold front approaching from the northwest. Storms will be capable of producing large hail and straight line damaging winds. - Cooler and drier pattern setting up for the second half of the weekend with northwest flow prevailing. && .DISCUSSION... Issued at 321 AM CDT Mon Jun 3 2024 Low confidence forecast remains in the short term with unstable atmosphere remaining, though there is not a clear sign of what, if anything, will ignite convection across the area. The broad pattern is depicted with zonal flow across the lower 48, with weak embedded short waves in the flow. Convection that formed overnight into the Central Plains has weakened as it has worked east into a stronger cap and weaker sheared environment. Outflow from this convection has move into NW Missouri, with a few scattered showers developing ahead of the boundary across north central Missouri. Have also seen a few isolated storms develop in south central Kansas. While one of these storms weakened, the northern storm has shown upscale growth over the last hour or so as cluster interacts with gravity waves. If this area of convection remains on it`s current trajectory, could see storms approach eastern Kansas towards sunrise. While the atmosphere remains unstable with roughly 2000 J/kg of CAPE, the flow in the mid-levels of the atmosphere remains fairly weak, making it questionable if the storms will be able to maintain themselves as they attempt to work farther east. With weak mid-level shear, expect any storms to largely remain below severe limits. With ample cloud debris around today, solar heating could be hindered slightly and have kept forecast highs in the lower 80s regionwide. Forecast remains unclear going into tonight convectionwise with unstable atmosphere remaining with broad 20-30 knot low level jet across the plains. There aren`t any obvious ways to work around weak capping inversion near 750 mb, but with lingering boundaries can`t entirely rule out the potential for a storm or two overnight. Again, with weak flow in the midlevels, shear looks to be fairly limited so any storm that does develop looks to largely remain below severe limits. Shortwave moving into the Pacific NW this morning is expected to move into the Plains on Tuesday. The attendant cold front with this system is expected to shift south, and by late in the day serve as a focusing mechanism for thunderstorm development. CAPE values ahead of the front are expected to be in the 1-2K range, but with increased shear, could see some stronger storms produce severe weather. Expect scattered storms to evolve fairly quickly into a liner system, progressing southeast with time. With initial discreet storms, could see large hail being the main severe threat before evolving into a severe wind threat. Ensemble mean suggests 0.5-1" precipitation amounts with this system, heaviest across eastern KS/western Missouri with lesser amounts farther east. Behind the front, area remain under the influence of northwest flow as trough develops over the Great Lakes region. Fairly substantial ridge develops across the western US, but is not really ably to expand east until at least early next week. && .AVIATION /12Z TAFS THROUGH 12Z TUESDAY/... Issued at 622 AM CDT Mon Jun 3 2024 MCS across central KS is expected to roll southeast. Could see showers, perhaps a thunderstorm on northern friges at IXD. Other sites should be far enough north to stay mostly dry. Can`t rule out an isolated- scattered thunderstorm through the day today, but timing and location is uncertain so have left mention out for now. && .EAX WATCHES/WARNINGS/ADVISORIES... MO...None. KS...None. && $$ DISCUSSION...BT AVIATION...BT