textproduct: Springfield

KEY MESSAGES

- Scattered shower and storm chances (40-80%) today into tomorrow, peaking in the afternoon and evening hours today as a cold front slowly pushes southeast across the area.

- Some isolated strong to severe storms are possible with this activity, with damaging wind gusts up to 60 mph and quarter sized hail possible in the strongest storms. SPC maintained Marginal (Level 1 of 5) Risk for severe storms across the area. - Near-normal temperatures in the 70s to near 80 beginning Tuesday, with seasonably pleasant and dry conditions continuing through the rest of the week.

SHORT TERM /THROUGH MONDAY NIGHT/

Issued at 203 PM CDT Sun Sep 20 2026

A second surface low is helping to spark convection along the incoming front over SE KS. These thunderstorms are forecast to slowly move northeast into our area throughout the evening hours. There is a vort max situated over SE KS/SW MO where the best chance for severe weather is expected to occur, even though a Marginal Risk (1/5) is draped entirely over most of our area. This SE KS/SW MO area is also where dewpoints are the highest at 68 F and 700-500 mb lapse rates are at 7-8 C/km and ample MUCAPE is present at 2000-3000 J/kg. Deep-layer shear is also sufficient around 30 knots. Biggest threats are frequent lightning, brief heavy rainfall, quarter sized hail, and 60 mph winds. Severe weather threat decreases further east where dewpoints are sitting in the upper 50s where drier air is present.

Daytime highs are expected to reach the upper 80s to mid 90s with the warmer temperatures over southern MO. Southerly winds have been gusty near 25 mph this afternoon ahead of the front. The cold front will slowly make its way to the area later tonight as winds shift out of the northeast near midnight. Showers and thunderstorms are expected to dissipate later this evening with clouds sticking around through the night and into the morning hours with patchy fog possible. Lows tonight will be in the mid to upper 60s with winds around 10 mph.

LONG TERM /TUESDAY THROUGH SUNDAY/

Issued at 203 PM CDT Sun Sep 20 2026

The cold air will be much welcomed after the summer we've had. Though, it'll take a bit for it to get here. Temperatures will really start to feel cooler on Tuesday and Wednesday. Though, this will be more near average for this time of year. Dewpoints will finally dip into the 50s Tuesday night making the evenings/mornings feel nice in cool as temperatures sit in the 50s as high pressure settles in and keeps these temperatures around for a few days. Daytime highs will be in the 70s and 80s to end the week with rain returning this weekend as the next front moves through.

AVIATION /00Z TAFS THROUGH 00Z MONDAY/

Issued at 611 PM CDT Sun Sep 20 2026

Showers and thunderstorms will continue to move through the area this evening, ending overnight, likely before 06z. Winds will be variable this evening in and near thunderstorms however a shift to the northwest is likely overnight. MVFR ceilings are likely to build down into the region Monday morning, most likely affecting JLN and SGF. The probability for IFR is low at this time but will monitor. Patchy fog will also be possible at the sites near 12z Monday.

CLIMATE

Issued at 100 AM CDT Sun Sep 20 2026

Record High Temperatures:

September 20: KSGF: 97/1954 KJLN: 99/1954 KVIH: 95/1954 KUNO: 97/1954

Record High Minimum Temperatures:

September 20: KSGF: 74/2018 KJLN: 75/1980 KUNO: 74/2018 KVIH: 73/2018

SGF WATCHES/WARNINGS/ADVISORIES

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