Fire Weather Watch 9:00 PM Heat Advisory — Harper, OK, Woods, OK, Alfalfa, OK, Grant, OK, Kay, OK, Ellis, OK, Woodward, OK, Major, OK, Garfield, OK, Noble, OK, Roger Mills, OK, Dewey, OK, Custer, OK, Blaine, OK, Kingfisher, OK, Logan, OK, Payne, OK, Beckham, OK, Washita, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Lincoln, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Hughes, OK, Harmon, OK, Greer, 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, Hardeman, TX, Foard, TX, Wilbarger, TX, Wichita, TX, Knox, TX, Baylor, TX, Archer, TX, Clay, TX 8:00 PM

Harper County, Oklahoma, United States

Last updated: 3:13 PM CDT  ·  Refresh
40°C
Feels like 39°
Clear
▲ 42°  /  ▼ 27°
Wind
18 mph SSW
Humidity
19%
Dew Point
14°
Pressure
27.70 inHg
Visibility
10 mi
UV Index
9.0
Cloud Cover
2%
Sunrise
6:53 AM
Sunset
8:33 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Harper County is currently clear at 40°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 923 J/kg) — isolated convective development possible. Sunrise: 6:53AM · Sunset: 8:33PM.

Alerts

Fire Weather Watch
Expires 9:00 PM
Heat Advisory
Harper, OK, Woods, OK, Alfalfa, OK, Grant, OK, Kay, OK, Ellis, OK, Woodward, OK, Major, OK, Garfield, OK, Noble, OK, Roger Mills, OK, Dewey, OK, Custer, OK, Blaine, OK, Kingfisher, OK, Logan, OK, Payne, OK, Beckham, OK, Washita, OK, Caddo, OK, Canadian, OK, Oklahoma, OK, Lincoln, OK, Grady, OK, McClain, OK, Cleveland, OK, Pottawatomie, OK, Seminole, OK, Hughes, OK, Harmon, OK, Greer, 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, Hardeman, TX, Foard, TX, Wilbarger, TX, Wichita, TX, Knox, TX, Baylor, TX, Archer, TX, Clay, TX
Expires 8:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
40°
3%
4 PM
41°
3%
5 PM
41°
3%
6 PM
42°
3%
7 PM
41°
3%
8 PM
39°
3%
9 PM
37°
3%
10 PM
34°
3%
11 PM
33°
3%
12 AM
32°
3%
1 AM
32°
3%
2 AM
31°
3%
3 AM
31°
3%
4 AM
31°
3%
5 AM
30°
3%
6 AM
27°
3%
7 AM
27°
3%
8 AM
28°
9%
9 AM
29°
9%
10 AM
33°
20%
11 AM
34°
21%
12 PM
36°
26%
1 PM
37°
25%
2 PM
38°
29%
7-Day Forecast
Today
42° 27°
Clear.
Thu
44° 27°
Partly Cloudy with a 35% chance of rain.
Fri
41° 23°
Mostly Clear with a 31% chance of rain.
Sat
40° 19°
Clear with a 21% chance of rain.
Sun
38° 23°
Clear.
Mon
39° 20°
Clear.
Tue
42° 21°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 40° Clear 3% 18 mph SSW 19%
4 PM 41° Clear 3% 18 mph S 18%
5 PM 41° Clear 3% 18 mph S 20%
6 PM 42° Clear 3% 18 mph S 21%
7 PM 41° Clear 3% 18 mph S 22%
8 PM 39° Clear 3% 16 mph S 26%
9 PM 37° Clear 3% 15 mph S 30%
10 PM 34° Clear 3% 15 mph S 34%
11 PM 33° Clear 3% 17 mph S 35%
12 AM 32° Clear 3% 18 mph S 37%
1 AM 32° Clear 3% 19 mph S 38%
2 AM 31° Clear 3% 19 mph S 40%
3 AM 31° Clear 3% 19 mph SSW 41%
4 AM 31° Mostly Clear 3% 19 mph SSW 43%
5 AM 30° Mostly Clear 3% 19 mph SSW 44%
6 AM 27° Mostly Clear 3% 19 mph SSW 45%
7 AM 27° Partly Cloudy 3% 18 mph SSW 45%
8 AM 28° Partly Cloudy 9% 18 mph SSW 41%
9 AM 29° Mostly Clear 9% 19 mph SSW 36%
10 AM 33° Mostly Clear 20% 19 mph SW 33%
11 AM 34° Partly Cloudy 21% 19 mph SW 30%
12 PM 36° Partly Cloudy 26% 19 mph SW 28%
1 PM 37° Partly Cloudy 25% 19 mph SW 26%
2 PM 38° Partly Cloudy 29% 18 mph SW 25%
15-Day Forecast
Today
8/12
Clear
3%
27°
42°
Thu
8/13
Partly Cloudy
35%
27°
44°
Fri
8/14
Mostly Clear
31%
23°
41°
Sat
8/15
Clear
21%
19°
40°
Sun
8/16
Clear
9%
23°
38°
Mon
8/17
Clear
9%
20°
39°
Tue
8/18
Clear
9%
21°
42°
Wed
8/19
Clear
60%
27°
42°
Thu
8/20
Clear
25%
23°
39°
Fri
8/21
Clear
31%
17°
39°
Sat
8/22
Clear
25%
19°
39°
Sun
8/23
Clear
60%
24°
37°
Mon
8/24
Clear
60%
23°
34°
Tue
8/25
Clear
60%
22°
34°
Wed
8/26
Clear
60%
22°
34°
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
45 AQI 50 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 52 Moderate 45 52
Fri 50 Good 50 50
Sat 49 Good 49 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 Wed Aug 12, 18:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1380 J/kg
MLCAPE683 J/kg
MUCAPE1380 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-2.5
Kinematics
0–6 km Shear9 kt
0–1 km Shear2 kt
Eff. Shear9 kt
0–1 km SRH-0
0–3 km SRH19
Eff. SRH19
Storm Motion112° @ 8 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.7
Thermo & Levels
PWAT1.30 in
0–3 km LR9.8 °C/km
700–500 LR6.5 °C/km
Total Totals49.4
LCL639 hPa
LFC938 hPa
EL167 hPa
Freezing Lvl15,299 ft