


Area Forecast Discussion
Issued by NWS Kansas City/Pleasant Hill, MO
Issued by NWS Kansas City/Pleasant Hill, MO
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943 FXUS63 KEAX 062009 AFDEAX Area Forecast Discussion National Weather Service Kansas City/Pleasant Hill MO 309 PM CDT Sun Jul 6 2025 .KEY MESSAGES... - Scattered storms this afternoon with gusty winds and brief very heavy rainfall possible. - Multiple chances for showers and storms this week with the most likely period Tuesday. - Near normal temperatures for the next week. && .DISCUSSION... Issued at 308 PM CDT Sun Jul 6 2025 A weak cold front is moving southward through the forecast area this afternoon. As of 19Z, this front is located roughly from near Moberly to between Harrisonville and Olathe. The front will serve as the primary focus for storms, though additional storms will develop or have already developed ahead of it where convective inhibition has eroded in the heat and humidity of the day. Shear is very weak, so the threat of any organized severe weather is nil. However, there is ample moisture with precipitable water values of 1.7" to 1.9". With some dry air aloft and steep lapse rates in the lowest 5000 ft of the atmosphere, downdraft CAPE values are in excess 1000 J/kg, which may support some gusty winds at the surface. Locally very heavy rainfall is also possible given the ample moisture in the atmosphere. The cold front is forecast to move south of the forecast area early this evening and that, combined with loss of daytime heating, should lead to storms ending and/or moving south of our forecast area. One other item to note in the near-term, is the MCS currently in central Nebraska. This system has reinvigorated in the warmth of the afternoon. Mean wind has this system propagating southeastward into northwestern MO this evening/overnight. Models also suggest that a weak internal PV anomaly has been produced by the system, which may help it propagate further east than forecast. Still, it seems unlikely to survive given the weak low-level moisture transport into it, weaker instability, and increasing inhibition as it does move toward the forecast area. For now, will work under the premise that this MCS will weaken before it moves into northwestern MO. The next decent chance for showers and storms will come Tuesday. Upper-level ridging will strengthen over the western US. This will force a more northwesterly flow regime over the middle of country. Models show a shortwave trough moving through the area Tuesday. Strong mid-level moisture transport into the area and MUCAPE values in the 2500 to 3500 J/kg range will support the potential for robust convection. With better deep-layer shear, though still somewhat weak, the potential for more organized convection is better, though still not great. And with continued high precipitable water values of 1.7" to 1.9", the potential for heavy rain will exist with this activity. Overall, it looks like multicells with gusty winds and heavy rain. The timing of the shortwave being before peak heating may limit the intensity and/or coverage of storms, especially across northern MO. Ensembles continue to show low end PoPs (15-30%) on nearly a daily basis with northwesterly flow and the possibility of embedded disturbances moving through the flow. These have limited or no predictability given they`re largely a result of upstream convection. The next more notable chance for storms comes Friday with another shortwave trough moving through the middle of the country. This will push a weak front through the forecast area. Ensemble guidance shows mean MUCAPE values near 2500 J/kg. Mean deep- layer shear continues to look weak with values near 20kts across the forecast area. Given the parameters and the potential for a front to move through an unstable airmass, PoPs in the 25-45% range look reasonable at this time for Friday. Regarding temperatures, normal highs for this time of year are in the upper 80s. Forecast highs are within a few degrees of our normal high for the next week, so we`ll continue to see seasonal temperatures through the forecast. && .AVIATION /18Z TAFS THROUGH 18Z MONDAY/... Issued at 1209 PM CDT Sun Jul 6 2025 Low VFR diurnal CU this afternoon with cloud bases of 3000-3500 ft AGL. These clouds dissipate soon after sunset with just some high clouds leftover. As of 17Z, convection is developing from east central KS into central MO. This activity will very likely stay south of our terminals. KIXD will be the closest to this activity but it still looks like convection will stay south of this terminal. Winds will be light from the north this afternoon and then become northeasterly to easterly overnight into tomorrow, remaining light. && .EAX WATCHES/WARNINGS/ADVISORIES... MO...None. KS...None. && $$ DISCUSSION...CDB AVIATION...CDB