textproduct: Kansas City/Pleasant Hill

KEY MESSAGES

- Hot, dry weather continues through the weekend. Breezy conditions forecast for Monday.

- Shower and storm chances (60-80%) return Tuesday evening through Thursday.

DISCUSSION

Issued at 220 AM CDT Sun Oct 11 2026

Mid-level ridging remains present across the Central Plains with a high amplitude trough over the western CONUS and the remnants of Hurricane Isaias merging into the synoptic pattern as a shortwave over the eastern CONUS. The shortwave will continue to lift north and merge with the flow today, which will further amplify the ridging over the Central Plains. At the surface, a stationary front is draped from southern Ontario to SD where lee cyclogenesis occurred yesterday. High pressure is present over the Gulf Coast, southeast of the low associated with Isaias, leaving the Central Plains sandwiched between the low in SD and high pressure to the southeast. This has resulted in southerly surface flow across the area, which combined with the mid-level ridging, will continue to support temperatures 15-20 degrees above normal. Highs today and Monday will be in the upper 80s and low 90s, which will approach, if not break, record highs. Also of note, low temperatures tonight and Monday night will only fall into the upper 60s and low 70s, which is in line with record high minimum temperatures.

Tonight into Monday, a shortwave will move through the flow, inciting lee cyclogenesis in northeast CO. This low pressure system will lift across NE through the day, tightening the pressure gradient over the Central Plains, as high pressure remains in place over the Gulf Coast. This will result in a breezy day on Monday, with sustained winds expected to be in the 15-20 mph range with gusts up to 35 mph possible. Ordinarily, this would raise fire weather concerns during this time of year, and while it has been very dry for the last week or so, afternoon RH values will only drop to 35-45%, so Red Flag conditions are not expected to be met. However, this is something that bears watching over the next couple of forecast cycles.

As the low pressure system continues to move northeast, it will push a cold front across NE and IA Monday evening/overnight. This front is expected to advance into northern MO Tuesday morning before stalling out. How far south the front makes it before stalling will dictate how hot temperatures will be across the area. North of the front, highs will likely be capped in the upper 70s and low 80s, while areas south of the front will experience another day of highs pushing towards or above 90F.

Precipitation chances (25-35%) will add another wrinkle in how high temperatures will climb Tuesday afternoon. Moisture transport from the Gulf is expected to reach the area on Tuesday and lift along the slow moving front may be enough to induce showers and storms Tuesday afternoon/evening. Currently, model guidance suggests that Tuesday afternoon will remain mostly dry before shower and storm chances increase (60-80%) Tuesday evening into the overnight hours as a 30 kt LLJ noses into the area. With PWAT values forecast to be in 2-2.25" range, heavy rainfall is on the table, though the finer details of this setup still need to be ironed out.

Forecast uncertainty increases Wednesday as model solutions diverge regarding the handling of the front across northern MO. The deterministic GFS and GEFS indicate that the front will continue moving south through the day on Wednesday, while the Canadian, ECMWF, and ENS hold the front around the I-70 corridor. This discrepancy is important, as areas along and south of the front will see 500-1000 J/kg of MUCAPE develop Wednesday afternoon in conjunction with 40-50 kts of deep layer shear, creating a low CAPE, high shear setup for potentially strong to severe storms. However, given the uncertainty on the placement of the front, it is difficult to say where the most favorable location for storms is Wednesday afternoon/evening. Heavy rainfall also remains possible, particularly along the front, Wednesday into Thursday.

Models continue to diverge through the end of the forecast period, with the GFS, Canadian, and GEFS lifting the western CONUS trough into the flow and pushing another cold front across the Central Plains, while the ECMWF and ENS generate a cutoff low over the western CONUS and indicate that mid-level ridging will remain present over the central CONUS. However, regardless of which solution you chose to look at, with the initial cold frontal passage on Tuesday/Wednesday, temperatures through the end of the forecast period should return to near seasonal values with highs in the 60s and low 70s behind the front.

AVIATION /06Z TAFS THROUGH 06Z MONDAY/

Issued at 1150 PM CDT Sat Oct 10 2026

VFR conditions are expected through the forecast. South winds of 5-10 kts overnight will increase to around 15kts with gusts of 25kts tomorrow afternoon. Winds will decrease and become less gusty with loss of daytime heating late tomorrow afternoon/ evening.

EAX WATCHES/WARNINGS/ADVISORIES

MO...None. KS...None.