Extreme Heat Warning — Atchison, KS, Miami, KS, Linn, KS, Leavenworth, KS, Wyandotte, KS, Johnson, KS, Platte, MO, Clay, MO, Jackson, MO, Cass, MO, Bates, MO 8:00 PM

Johnson County, Kansas, United States

Last updated: 8:42 AM CDT  ·  Refresh
24°C
Feels like 24°
Mostly Clear
▲ 35°  /  ▼ 23°
Wind
12 mph SE
Humidity
78%
Dew Point
20°
Pressure
28.93 inHg
Visibility
10 mi
UV Index
4.6
Cloud Cover
19%
Sunrise
6:53 AM
Sunset
7:40 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnson County is currently mostly clear at 24°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1834 J/kg) — isolated convective development possible. Sunrise: 6:53AM · Sunset: 7:40PM.

Alerts

Extreme Heat Warning
Atchison, KS, Miami, KS, Linn, KS, Leavenworth, KS, Wyandotte, KS, Johnson, KS, Platte, MO, Clay, MO, Jackson, MO, Cass, MO, Bates, MO
Expires 8:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
26%
9 AM
23°
27%
10 AM
26°
23%
11 AM
27°
21%
12 PM
29°
14%
1 PM
33°
3%
2 PM
34°
3%
3 PM
35°
3%
4 PM
35°
3%
5 PM
35°
3%
6 PM
34°
3%
7 PM
33°
3%
8 PM
32°
3%
9 PM
29°
3%
10 PM
28°
3%
11 PM
27°
3%
12 AM
27°
3%
1 AM
27°
3%
2 AM
26°
3%
3 AM
26°
3%
4 AM
25°
3%
5 AM
24°
3%
6 AM
24°
3%
7 AM
24°
3%
7-Day Forecast
Today
35° 23°
Mostly Clear with a 26% chance of rain.
Tue
41° 24°
Partly Cloudy.
Wed
38° 22°
Partly Cloudy with a 78% chance of rain.
Thu
33° 18°
Mostly Cloudy with a 78% chance of rain.
Fri
37° 19°
Rain, 82% chance.
Sat
36° 17°
Rain, 82% chance.
Sun
40° 22°
Drizzle, 72% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Clear 26% 11 mph SE 79%
9 AM 23° Mostly Clear 27% 12 mph SE 72%
10 AM 26° Mostly Clear 23% 12 mph SE 66%
11 AM 27° Mostly Clear 21% 11 mph SE 61%
12 PM 29° Mostly Clear 14% 11 mph SSE 56%
1 PM 33° Mostly Clear 3% 10 mph SSE 52%
2 PM 34° Mostly Clear 3% 11 mph SE 49%
3 PM 35° Mostly Clear 3% 11 mph SE 46%
4 PM 35° Mostly Clear 3% 11 mph SE 45%
5 PM 35° Clear 3% 11 mph SE 46%
6 PM 34° Clear 3% 10 mph SE 48%
7 PM 33° Clear 3% 10 mph SE 50%
8 PM 32° Mostly Clear 3% 10 mph SE 53%
9 PM 29° Mostly Clear 3% 11 mph SE 55%
10 PM 28° Mostly Clear 3% 11 mph SE 56%
11 PM 27° Clear 3% 12 mph SE 58%
12 AM 27° Clear 3% 12 mph SE 59%
1 AM 27° Clear 3% 12 mph SE 60%
2 AM 26° Mostly Clear 3% 11 mph SSE 62%
3 AM 26° Mostly Clear 3% 11 mph SSE 64%
4 AM 25° Mostly Clear 3% 11 mph SSE 65%
5 AM 24° Mostly Clear 3% 11 mph SSE 65%
6 AM 24° Mostly Clear 3% 11 mph SSE 66%
7 AM 24° Mostly Clear 3% 11 mph SSE 64%
15-Day Forecast
Today
9/7
Mostly Clear
26%
23°
35°
Tue
9/8
Partly Cloudy
12%
24°
41°
Wed
9/9
Partly Cloudy
78%
22°
38°
Thu
9/10
Mostly Cloudy
78%
18°
33°
Fri
9/11
Rain
82%
19°
37°
Sat
9/12
Rain
82%
17°
36°
Sun
9/13
Drizzle
72%
22°
40°
Mon
9/14
Drizzle
68%
18°
34°
Tue
9/15
Drizzle
68%
12°
30°
Wed
9/16
Drizzle
51%
6°
29°
Thu
9/17
Drizzle
60%
11°
29°
Fri
9/18
Drizzle
60%
16°
29°
Sat
9/19
Drizzle
60%
16°
30°
Sun
9/20
Drizzle
60%
15°
29°
Mon
9/21
Clear
25%
15°
30°
52
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
52 AQI 9.8 µg/m³
O3
Ground-level ozone
40 AQI 44 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 52 Moderate 40 52
Wed 56 Moderate 47 56
Thu 47 Good 47 45
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Mon Sep 7, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE68 J/kg
MLCAPE94 J/kg
MUCAPE408 J/kg
SBCIN-404 J/kg
MLCIN-336 J/kg
Lifted Index0.3
Kinematics
0–6 km Shear25 kt
0–1 km Shear18 kt
Eff. Shear35 kt
0–1 km SRH174
0–3 km SRH314
Eff. SRH209
Storm Motion51° @ 13 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell1.5
K-Index35.1
Thermo & Levels
PWAT1.71 in
0–3 km LR5.0 °C/km
700–500 LR5.6 °C/km
Total Totals45.8
LCL920 hPa
LFC662 hPa
EL514 hPa
Freezing Lvl14,249 ft