Heat Advisory — Alfalfa, OK, Grant, OK, Kay, OK, Major, OK, Garfield, OK, Noble, OK, Blaine, OK, Kingfisher, OK, Logan, OK, Payne, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Lincoln, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Hughes, OK, Kiowa, OK, Jackson, OK, Tillman, OK, Comanche, OK, Stephens, OK, Garvin, OK, Murray, OK, Pontotoc, OK, Coal, OK, Cotton, OK, Jefferson, OK, Carter, OK, Johnston, OK, Atoka, OK, Love, OK, Marshall, OK, Bryan, OK, Wilbarger, TX, Wichita, TX, Archer, TX, Clay, TX 8:00 PM

Johnston County, Oklahoma, United States

Last updated: 3:13 AM CDT  ·  Refresh
23°C
Feels like 26°
Mostly Clear
▲ 38°  /  ▼ 21°
Wind
5 mph SE
Humidity
83%
Dew Point
20°
Pressure
29.12 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
26%
Sunrise
6:42 AM
Sunset
8:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Johnston County is currently mostly clear at 23°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1845 J/kg) — isolated convective development possible. Sunrise: 6:42AM · Sunset: 8:21PM.

Alerts

Heat Advisory
Alfalfa, OK, Grant, OK, Kay, OK, Major, OK, Garfield, OK, Noble, OK, Blaine, OK, Kingfisher, OK, Logan, OK, Payne, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Lincoln, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Hughes, OK, Kiowa, OK, Jackson, OK, Tillman, OK, Comanche, OK, Stephens, OK, Garvin, OK, Murray, OK, Pontotoc, OK, Coal, OK, Cotton, OK, Jefferson, OK, Carter, OK, Johnston, OK, Atoka, OK, Love, OK, Marshall, OK, Bryan, OK, Wilbarger, TX, Wichita, TX, Archer, TX, Clay, TX
Expires 8:00 PM
53 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
23°
14%
4 AM
22°
18%
5 AM
22°
18%
6 AM
20°
17%
7 AM
21°
17%
8 AM
23°
17%
9 AM
26°
17%
10 AM
28°
7%
11 AM
31°
7%
12 PM
33°
7%
1 PM
34°
8%
2 PM
36°
8%
3 PM
37°
8%
4 PM
37°
8%
5 PM
36°
8%
6 PM
34°
3%
7 PM
33°
3%
8 PM
31°
3%
9 PM
29°
3%
10 PM
28°
3%
11 PM
27°
3%
12 AM
26°
3%
1 AM
26°
3%
2 AM
27°
3%
7-Day Forecast
Today
38° 21°
Clear.
Sun
40° 21°
Clear.
Mon
39° 23°
Clear.
Tue
39° 24°
Clear.
Wed
39° 26°
Clear.
Thu
40° 26°
Clear.
Fri
40° 26°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 23° Mostly Clear 14% 5 mph SE 83%
4 AM 22° Partly Cloudy 18% 7 mph SE 85%
5 AM 22° Partly Cloudy 18% 6 mph SE 86%
6 AM 20° Mostly Clear 17% 5 mph SSE 88%
7 AM 21° Mostly Clear 17% 4 mph S 87%
8 AM 23° Mostly Clear 17% 6 mph SSW 80%
9 AM 26° Clear 17% 8 mph SSW 70%
10 AM 28° Clear 7% 9 mph SW 62%
11 AM 31° Clear 7% 8 mph SW 54%
12 PM 33° Clear 7% 7 mph SSW 45%
1 PM 34° Clear 8% 6 mph SSW 37%
2 PM 36° Clear 8% 5 mph S 33%
3 PM 37° Clear 8% 6 mph SSE 29%
4 PM 37° Clear 8% 8 mph SSE 28%
5 PM 36° Clear 8% 9 mph SSE 30%
6 PM 34° Clear 3% 11 mph SSE 32%
7 PM 33° Clear 3% 12 mph SSE 34%
8 PM 31° Clear 3% 11 mph SSE 39%
9 PM 29° Clear 3% 11 mph SSE 45%
10 PM 28° Clear 3% 10 mph SSE 50%
11 PM 27° Mostly Clear 3% 10 mph SSE 55%
12 AM 26° Mostly Clear 3% 9 mph SSE 59%
1 AM 26° Mostly Clear 3% 9 mph SSE 62%
2 AM 27° Mostly Clear 3% 8 mph SSE 66%
15-Day Forecast
Today
8/8
Clear
17%
21°
38°
Sun
8/9
Clear
3%
21°
40°
Mon
8/10
Clear
3%
23°
39°
Tue
8/11
Clear
3%
24°
39°
Wed
8/12
Clear
3%
26°
39°
Thu
8/13
Clear
8%
26°
40°
Fri
8/14
Clear
17%
26°
40°
Sat
8/15
Clear
43%
26°
40°
Sun
8/16
Rain
43%
20°
39°
Mon
8/17
Clear
21%
23°
40°
Tue
8/18
Clear
25%
26°
41°
Wed
8/19
Drizzle
60%
26°
40°
Thu
8/20
Drizzle
60%
26°
40°
Fri
8/21
Drizzle
60%
25°
39°
Sat
8/22
Drizzle
60%
24°
38°
53
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
53 AQI 10.4 µg/m³
O3
Ground-level ozone
44 AQI 49 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 53 Moderate 44 53
Sun 42 Good 42 40
Mon 47 Good 43 47
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 Sat Aug 8, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE242 J/kg
MLCAPE289 J/kg
MUCAPE794 J/kg
SBCIN-536 J/kg
MLCIN0 J/kg
Lifted Index-3.0
Kinematics
0–6 km Shear17 kt
0–1 km Shear24 kt
Eff. Shear41 kt
0–1 km SRH262
0–3 km SRH164
Eff. SRH-47
Storm Motion307° @ 16 kt
0–1 km EHI0.4
Composite Parameters
Sig. Tornado0.2
STP (eff)0.0
Supercell0.0
K-Index41.9
Thermo & Levels
PWAT1.57 in
0–3 km LR4.5 °C/km
700–500 LR6.9 °C/km
Total Totals54.4
LCL948 hPa
LFC659 hPa
EL372 hPa
Freezing Lvl14,482 ft