textproduct: Kansas City/Pleasant Hill

KEY MESSAGES

* Heat advisory/excessive heat warning in effect through Thursday/Friday along and south of highway 36.

* Low chances continue for overnight/morning showers and thunderstorms across the region, with best chances across northern Missouri.

* There is the potential for a few isolated strong storms tomorrow night and again on Thursday night with damaging winds and large hail the main threats.

DISCUSSION

Issued at 145 PM CDT Tue Aug 11 2026

The main forecast concern today through Friday/Saturday will continue to be the heat. As such, an Extreme Heat Warning has been extended to include areas along and south of the Missouri River where daytime heat index values will remain between 105-110 each day and 75-80 each night. A Heat Advisory remains in effect through Thursday evening north of the Excessive Heat Warning along the Highway 36 corridor. This prolonged heat event will come courtesy of a upper ridge that resides over much of the southern CONUS into the central Rockies. This upper level ridge will slowly slide east through the week with the ridge axis moving over the local area Thursday. This will keep highs in the 90s to around 100 through Thursday. The local area will be on the northern periphery of this ridge, with weak shortwaves rounding the ridge moving into the area providing occasional slight chance to chance PoPs (20-40%) across northern Missouri though Thursday night.

Friday into Friday night, a relatively stronger shortwave will move across the northern/central Plains into the Upper Midwest. This will act to flatten the ridge and force a weak surface boundary into the northern CWA. This is expected to bring slightly cooler temperatures to northern Missouri with highs in the upper 80s to lower 90s. However, south of this surface boundary temperatures will continue to remain hot with highs remaining in the mid 90s to near 100. This boundary may also be the focus for slight chance to chance (20-40%) convection Friday into Friday night across the northern CWA. Continued shortwaves are expected to help slowly force this boundary southward through the area through the weekend continuing to keep slight chance to chance PoPs around for the weekend. By Sunday, temperature are expected to range from the mid 80s north to the mid 90s south. Monday, with the upper level ridge remaining flattened across the region a shortwave is expected to move through the area bringing another chance for storms which is forecast to aid in cooler temperatures into the lower 80s to lower 90s.

AVIATION /00Z TAFS THROUGH 00Z THURSDAY/

Issued at 616 PM CDT Tue Aug 11 2026

VFR conditions expected to prevail across the sites through the period. Winds will continue out of the S to SW throughout, predominantly in the 8kt to 15kt range, including overnight. Aside from some higher level smoke washing out the sky at times, cloud cover will generally range from clear to scattered in nature and >15kft. While shower / storm chances expected to remain northward over Nebraska / Iowa, depending on how it evolves, more substantial, but still VFR, cloud cover could result during latter portions of the period.

EAX WATCHES/WARNINGS/ADVISORIES

MO...Extreme Heat Warning until 8 PM CDT Friday for MOZ028>033- 037>040-043>046-053-054. Heat Advisory until 8 PM CDT Thursday for MOZ011>017-020>025. KS...Extreme Heat Warning until 8 PM CDT Friday for KSZ025-057-060- 103>105. Heat Advisory until 8 PM CDT Thursday for KSZ102.