Heat Advisory — Atchison, KS, Doniphan, KS, Leavenworth, KS, Wyandotte, KS, Johnson, KS, Andrew, MO, De Kalb, MO, Buchanan, MO, Clinton, MO, Caldwell, MO, Livingston, MO, Platte, MO, Clay, MO, Ray, MO, Carroll, MO, Chariton, MO, Randolph, MO, Jackson, MO, Lafayette, MO 8:00 PM

Johnson County, Kansas, United States

Last updated: 5:11 AM CDT  ·  Refresh
27°C
Feels like 26°
Clear
▲ 36°  /  ▼ 27°
Wind
11 mph SSW
Humidity
63%
Dew Point
19°
Pressure
28.85 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
5%
Sunrise
6:29 AM
Sunset
8:18 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnson County is currently clear at 26°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2486 J/kg) — isolated convective development possible. Sunrise: 6:29AM · Sunset: 8:18PM.

Alerts

Heat Advisory
Atchison, KS, Doniphan, KS, Leavenworth, KS, Wyandotte, KS, Johnson, KS, Andrew, MO, De Kalb, MO, Buchanan, MO, Clinton, MO, Caldwell, MO, Livingston, MO, Platte, MO, Clay, MO, Ray, MO, Carroll, MO, Chariton, MO, Randolph, MO, Jackson, MO, Lafayette, MO
Expires 8:00 PM
42 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
3%
6 AM
24°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
28°
3%
10 AM
28°
3%
11 AM
30°
3%
12 PM
31°
3%
1 PM
33°
3%
2 PM
35°
3%
3 PM
36°
3%
4 PM
36°
4%
5 PM
35°
4%
6 PM
36°
4%
7 PM
35°
4%
8 PM
33°
6%
9 PM
32°
6%
10 PM
31°
5%
11 PM
31°
5%
12 AM
30°
8%
1 AM
29°
8%
2 AM
29°
9%
3 AM
29°
5%
4 AM
28°
5%
7-Day Forecast
Today
36° 27°
Partly Cloudy.
Wed
39° 26°
Partly Cloudy with a 26% chance of rain.
Thu
38° 24°
Clear with a 25% chance of rain.
Fri
38° 22°
Mostly Clear with a 22% chance of rain.
Sat
41° 26°
Clear.
Sun
36° 24°
Overcast with a 31% chance of rain.
Mon
36° 21°
Clear with a 31% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 27° Clear 3% 11 mph SSW 63%
6 AM 24° Mostly Clear 3% 12 mph SSW 61%
7 AM 24° Partly Cloudy 3% 12 mph SSW 62%
8 AM 26° Partly Cloudy 3% 13 mph SSW 61%
9 AM 28° Mostly Clear 3% 15 mph SSW 58%
10 AM 28° Clear 3% 15 mph SW 55%
11 AM 30° Mostly Clear 3% 15 mph SW 52%
12 PM 31° Partly Cloudy 3% 15 mph SW 48%
1 PM 33° Partly Cloudy 3% 15 mph SW 44%
2 PM 35° Partly Cloudy 3% 14 mph SW 42%
3 PM 36° Partly Cloudy 3% 14 mph SSW 40%
4 PM 36° Mostly Cloudy 4% 13 mph SSW 38%
5 PM 35° Partly Cloudy 4% 13 mph SSW 40%
6 PM 36° Partly Cloudy 4% 11 mph SSW 43%
7 PM 35° Partly Cloudy 4% 10 mph S 46%
8 PM 33° Partly Cloudy 6% 10 mph S 49%
9 PM 32° Partly Cloudy 6% 10 mph S 52%
10 PM 31° Partly Cloudy 5% 11 mph S 54%
11 PM 31° Partly Cloudy 5% 12 mph S 54%
12 AM 30° Partly Cloudy 8% 12 mph SSW 53%
1 AM 29° Mostly Clear 8% 13 mph SSW 52%
2 AM 29° Mostly Clear 9% 13 mph SSW 53%
3 AM 29° Partly Cloudy 5% 13 mph SSW 54%
4 AM 28° Mostly Clear 5% 14 mph SSW 54%
15-Day Forecast
Today
8/11
Partly Cloudy
6%
27°
36°
Wed
8/12
Partly Cloudy
26%
26°
39°
Thu
8/13
Clear
25%
24°
38°
Fri
8/14
Mostly Clear
22%
22°
38°
Sat
8/15
Clear
17%
26°
41°
Sun
8/16
Overcast
31%
24°
36°
Mon
8/17
Clear
31%
21°
36°
Tue
8/18
Clear
34%
24°
41°
Wed
8/19
Clear
35%
23°
41°
Thu
8/20
Mostly Clear
32%
27°
42°
Fri
8/21
Drizzle
60%
23°
42°
Sat
8/22
Drizzle
60%
23°
38°
Sun
8/23
Clear
60%
23°
38°
Mon
8/24
Drizzle
60%
22°
36°
Tue
8/25
Drizzle
60%
22°
36°
42
Good
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
42 AQI 7.5 µg/m³
O3
Ground-level ozone
34 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 42 Good 34 42
Wed 31 Good 31 26
Thu 49 Good 33 49
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 Tue Aug 11, 08:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE718 J/kg
MLCAPE1238 J/kg
MUCAPE1488 J/kg
SBCIN-767 J/kg
MLCIN0 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear12 kt
0–1 km Shear19 kt
Eff. Shear—
0–1 km SRH130
0–3 km SRH140
Eff. SRH—
Storm Motion96° @ 4 kt
0–1 km EHI0.6
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index25.5
Thermo & Levels
PWAT1.35 in
0–3 km LR4.4 °C/km
700–500 LR8.0 °C/km
Total Totals51.2
LCL880 hPa
LFC614 hPa
EL221 hPa
Freezing Lvl14,524 ft