Excessive Heat Watch 12:00 AM Heat Advisory — Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Boone, MO, Audrain, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO 10:00 PM Excessive Heat Warning — Boone, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Gasconade, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO 8:00 PM

Franklin County, Missouri, United States

Last updated: 7:49 PM CDT  ·  Refresh
30°C
Feels like 35°
Mostly Clear
▲ 34°  /  ▼ 22°
Wind
6 mph SSE
Humidity
73%
Dew Point
23°
Pressure
29.26 inHg
Visibility
10 mi
UV Index
2.0
Cloud Cover
30%
Sunrise
5:44 AM
Sunset
8:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Franklin County is currently mostly clear at 30°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2984 J/kg) — isolated convective development possible. Sunrise: 5:44AM · Sunset: 8:31PM.

Alerts

Excessive Heat Watch
Expires 12:00 AM
Heat Advisory
Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Boone, MO, Audrain, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Lincoln, MO, Gasconade, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO
Expires 10:00 PM
Excessive Heat Warning
Boone, MO, Moniteau, MO, Cole, MO, Osage, MO, Callaway, MO, Montgomery, MO, Gasconade, MO, Warren, MO, St. Charles, MO, Franklin, MO, St. Louis, MO, St. Louis City, MO, Jefferson, MO, Ste. Genevieve, MO, Knox, MO, Lewis, MO, Shelby, MO, Marion, MO, Monroe, MO, Ralls, MO, Pike, MO, Audrain, MO, Lincoln, MO, Crawford, MO, Washington, MO, St. Francois, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 8:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
30°
32%
8 PM
29°
48%
9 PM
27°
33%
10 PM
26°
32%
11 PM
26°
32%
12 AM
25°
19%
1 AM
24°
4%
2 AM
24°
4%
3 AM
23°
8%
4 AM
24°
8%
5 AM
22°
8%
6 AM
23°
8%
7 AM
24°
13%
8 AM
26°
14%
9 AM
29°
14%
10 AM
31°
22%
11 AM
32°
30%
12 PM
33°
25%
1 PM
33°
25%
2 PM
34°
32%
3 PM
33°
32%
4 PM
33°
22%
5 PM
32°
18%
6 PM
32°
8%
7-Day Forecast
Tonight
34° 22°
Mostly Clear with a 32% chance of rain.
Fri
36° 22°
Clear with a 25% chance of rain.
Sat
36° 23°
Mostly Clear with a 46% chance of rain.
Sun
33° 21°
Partly Cloudy with a 36% chance of rain.
Mon
33° 20°
Overcast with a 54% chance of rain.
Tue
33° 19°
Drizzle, 51% chance.
Wed
34° 21°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 30° Mostly Clear 32% 6 mph SSE 73%
8 PM 29° Partly Cloudy 48% 6 mph SSE 79%
9 PM 27° Partly Cloudy 33% 6 mph SSE 84%
10 PM 26° Partly Cloudy 32% 6 mph S 86%
11 PM 26° Mostly Cloudy 32% 5 mph S 86%
12 AM 25° Overcast 19% 6 mph SSW 88%
1 AM 24° Mostly Cloudy 4% 5 mph SSW 89%
2 AM 24° Partly Cloudy 4% 5 mph SW 91%
3 AM 23° Partly Cloudy 8% 5 mph SW 93%
4 AM 24° Mostly Clear 8% 4 mph SSW 89%
5 AM 22° Mostly Clear 8% 4 mph SSW 90%
6 AM 23° Clear 8% 4 mph SSW 89%
7 AM 24° Clear 13% 5 mph SSW 82%
8 AM 26° Clear 14% 6 mph SSW 75%
9 AM 29° Clear 14% 6 mph SSW 68%
10 AM 31° Clear 22% 6 mph SSW 62%
11 AM 32° Clear 30% 6 mph SSW 56%
12 PM 33° Clear 25% 6 mph SW 52%
1 PM 33° Mostly Clear 25% 6 mph SSW 51%
2 PM 34° Partly Cloudy 32% 7 mph SSW 52%
3 PM 33° Partly Cloudy 32% 7 mph SSW 53%
4 PM 33° Partly Cloudy 22% 6 mph SSW 56%
5 PM 32° Mostly Clear 18% 5 mph SSW 58%
6 PM 32° Clear 8% 4 mph SSW 61%
15-Day Forecast
Today
7/2
Mostly Clear
32%
22°
34°
Fri
7/3
Clear
25%
22°
36°
Sat
7/4
Mostly Clear
46%
23°
36°
Sun
7/5
Partly Cloudy
36%
21°
33°
Mon
7/6
Overcast
54%
20°
33°
Tue
7/7
Drizzle
51%
19°
33°
Wed
7/8
Rain
63%
21°
34°
Thu
7/9
Clear
31%
21°
34°
Fri
7/10
Thunderstorm
63%
21°
33°
Sat
7/11
Thunderstorm
51%
21°
37°
Sun
7/12
Rain
68%
19°
32°
Mon
7/13
Drizzle
60%
19°
32°
Tue
7/14
Drizzle
60%
19°
32°
Wed
7/15
Drizzle
60%
19°
33°
Thu
7/16
Drizzle
60%
20°
34°
56
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
56 AQI 12.0 µg/m³
O3
Ground-level ozone
27 AQI 30 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 56 Moderate 27 56
Sat 55 Moderate 25 55
Sun 57 Moderate 28 57
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 Thu Jul 2, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE2834 J/kg
MLCAPE2614 J/kg
MUCAPE2978 J/kg
SBCIN-140 J/kg
MLCIN0 J/kg
Lifted Index-6.1
Kinematics
0–6 km Shear9 kt
0–1 km Shear12 kt
Eff. Shear13 kt
0–1 km SRH-13
0–3 km SRH-34
Eff. SRH-34
Storm Motion186° @ 26 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index30.2
Thermo & Levels
PWAT1.76 in
0–3 km LR6.1 °C/km
700–500 LR6.3 °C/km
Total Totals48.8
LCL903 hPa
LFC763 hPa
EL148 hPa
Freezing Lvl15,272 ft