textproduct: Topeka

KEY MESSAGES

- Severe thunderstorms expected (50-90% chance) this afternoon into early this evening, mainly in east-central Kansas. Locally heavy rainfall also possible, mainly in far southeastern areas.

- Fire danger into elevated levels Saturday and Sunday along Highway 81 in north-central Kansas.

- Low temperatures close to freezing Saturday and Sunday mornings, with frost potential Sunday morning.

DISCUSSION

Issued at 1242 PM CDT Fri Apr 17 2026

Volatile situation setting up over eastern and southern portions of the state this afternoon with upper low moving east along the central Canadian border with associated trough in at least one piece south-southwest into the Four Corners impinging on a moist and very unstable atmosphere over the Plains. Cold front had passed through north-central Kansas by noon, lagging a bit more to the southwest to a surface low over northeast Oklahoma. 16Z MLCAPE analysis already had values around 2500 J/kg with over 3000 J/kg quite possible by mid afternoon with effective shear of 40-50 knots. Low-level wind fields will likely keep some veering, however tornadic potential remains with any more isolated storms early then possibly in QLCS activity later in the event, so very large hail and potent straight-line winds will be the main concerns. Main area of concern looks to be east-central Kansas where instability will be the greatest and the front come in the latest. Severe thunderstorm activity should peak by late afternoon and exit the area by 8 PM, though some training could linger mainly along and southeast of I-35 as the effective front becomes more parallel to the upper flow and could lead to a few rounds of heavy rainfall into the late evening.

Concerns late tonight into Sunday turn to more of a early to mid spring variety with fire weather and growing season impacts. Northwest winds keep some speed Saturday but back off Sunday when the driest air is in place. Fire weather partners indicate only limited grassland response in the far western counties that could still support some very active wildfires and, even going slightly windier for Saturday, still only brings fire danger indicies into the Very High category. These winds Saturday keep frost in check with much weaker winds Sunday morning supporting some frost. Most guidance keeps lows above freezing for even the coldest areas in north-central Kansas.

Temperatures return to above normal levels early next week with the next chance for precipition late in the week.

AVIATION /00Z TAFS THROUGH 00Z SATURDAY/

Issued at 614 PM CDT Fri Apr 17 2026

VFR conditions expected though clouds around FL050 look rather persistent for at least the next several hours. Winds may back off somewhat in the 08-14Z window but should return by 16Z.

FIRE WEATHER

Issued at 1242 PM CDT Fri Apr 17 2026

Not much change to previous forecast. Saturday brings the stronger winds but RH only dropping to around 20 percent for a few hours. Sunday looks drier but much weaker winds. Saturday will likely be more concerning but confidence in Red Flag conditions remains too low for any headlines.

TOP WATCHES/WARNINGS/ADVISORIES

None.