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Viz 1 of 3: Visual Craft & Beauty
NOAA GHCNd Station USW00013988· Kansas City Downtown Airport· 1934 → 2026 Unbroken

Ninety-Two Years of Kansas City Weather

Rather than repeating the saturated trope of warming stripes or climate spirals, this visualization focuses on a subtle, profound climatological signal: the narrowing of the diurnal temperature swing (TMAX − TMIN) over nine consecutive decades.

Continuous Span
92 Years
1934-01-01 to 2026-08-31
Observations
33,604
Daily TMAX, TMIN, PRCP
1930s Mean Swing
22.6°F
Wide diurnal swings (Dust Bowl)
2020s Mean Swing
18.7°F
−17.3% diurnal compression

The Decadal Compression of Daily Swings (1930s → 2020s)

TMIN night temperatures (+2.8°F) have risen 2.5x faster than TMAX daytime highs (+1.1°F), flattening the daily range.
Source: NOAA NCEI GHCN-Daily
Climatological Finding: In the 1930s and 1940s, Kansas City averaged daily temperature swings of 22.6°F. By the 2020s, this swing compressed to 18.7°F. The primary driver is urban heat retention and elevated atmospheric moisture, which acts as a thermal blanket preventing nocturnal radiational cooling.

The Annual Diurnal Ribbon: 365-Day Percentile Envelope

Seasonal swing dynamics: Spring and Autumn feature the widest swings (dry continental fronts), while Summer and Winter compress under humid and overcast air masses.
Historical Envelope (10th, 25th, 50th, 75th, 90th Percentiles)
Restrained Visual Craft: The shaded ribbon represents the 10th-to-90th and 25th-to-75th percentile envelopes across 33,600 historical observations. The dark solid line indicates the median daily swing. Note the pronounced twin peaks in April and October when dry continental air masses collide with solar heating.

Notable Historical Diurnal Swing Extremes

Single-day meteorological records at station USW00013988 (KC Downtown Airport)
All records verified against GHCNd inventory
Date Event Description High (TMAX) Low (TMIN) Daily Swing Synoptic Mechanism
1940-11-11 Armistice Day Blizzard 65°F 17°F 48°F Historic Arctic cold front crashed through mid-day, dropping temperatures 48°F in under 12 hours.
1989-12-21 Pre-Christmas Arctic Surge 42°F −6°F 48°F Severe baroclinic front swept across the Central Plains following intense pre-frontal warm advection.
2007-04-06 Easter Freeze Front 71°F 24°F 47°F Spring freeze following record early vegetative warmth, causing catastrophic regional crop damage.
1954-07-14 Dust Bowl Era Summer Heat 110°F 68°F 42°F Desiccated soils eliminated evaporative cooling, allowing intense daytime heating and rapid nighttime radiational cooling.
2021-02-14 Winter Storm Uri Polar Vortex 14°F −13°F 27°F Compressed diurnal swing under solid Arctic overcast with persistent sub-zero air.