Heat Advisory — 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, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO 7:00 PM

Franklin County, Missouri, United States

Last updated: 3:49 AM CDT  ·  Refresh
24°C
Feels like 27°
Mostly Cloudy
▲ 33°  /  ▼ 22°
Wind
5 mph WSW
Humidity
88%
Dew Point
22°
Pressure
29.20 inHg
Visibility
9 mi
UV Index
0.0
Cloud Cover
74%
Sunrise
5:55 AM
Sunset
8:25 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Franklin County is currently mostly cloudy at 24°C. Precipitation is likely — peak probability 90% around 1 PM. Atmospheric instability is elevated (CAPE up to 2411 J/kg) — isolated convective development possible. Sunrise: 5:55AM · Sunset: 8:25PM.

Alerts

Heat Advisory
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, Crawford, MO, Washington, MO, St. Francois, MO, Ste. Genevieve, MO, Iron, MO, Madison, MO, Reynolds, MO
Expires 7:00 PM
51 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
24°
8%
4 AM
23°
15%
5 AM
23°
15%
6 AM
23°
15%
7 AM
24°
30%
8 AM
27°
44%
9 AM
29°
48%
10 AM
30°
66%
11 AM
31°
71%
12 PM
31°
85%
1 PM
31°
90%
2 PM
30°
90%
3 PM
29°
90%
4 PM
29°
90%
5 PM
28°
72%
6 PM
27°
48%
7 PM
27°
45%
8 PM
26°
48%
9 PM
24°
29%
10 PM
24°
12%
11 PM
24°
8%
12 AM
24°
6%
1 AM
23°
6%
2 AM
23°
18%
7-Day Forecast
Today
33° 22°
Rain, 90% chance.
Mon
36° 22°
Haze with a 20% chance of rain.
Tue
38° 21°
Clear with a 21% chance of rain.
Wed
29° 17°
Mostly Clear with a 37% chance of rain.
Thu
30° 16°
Clear with a 51% chance of rain.
Fri
32° 17°
Heavy Rain, 90% chance.
Sat
31° 16°
Drizzle, 53% chance.
TimeTempConditionsPrecipWindHumidity
Now 24° Mostly Cloudy 8% 5 mph WSW 88%
4 AM 23° Mostly Cloudy 15% 5 mph WSW 89%
5 AM 23° Partly Cloudy 15% 4 mph WSW 90%
6 AM 23° Partly Cloudy 15% 4 mph WSW 89%
7 AM 24° Mostly Clear 30% 5 mph W 84%
8 AM 27° Mostly Clear 44% 4 mph WNW 77%
9 AM 29° Clear 48% 4 mph NW 72%
10 AM 30° Mostly Clear 66% 4 mph NW 69%
11 AM 31° Partly Cloudy 71% 3 mph NW 67%
12 PM 31° Mostly Cloudy 85% 3 mph NW 65%
1 PM 31° Heavy Rain 90% 6 mph WSW 70%
2 PM 30° Rain 90% 7 mph WSW 76%
3 PM 29° Rain 90% 6 mph N 83%
4 PM 29° Rain 90% 3 mph NNW 85%
5 PM 28° Mostly Cloudy 72% 3 mph E 87%
6 PM 27° Partly Cloudy 48% 4 mph E 90%
7 PM 27° Partly Cloudy 45% 4 mph E 92%
8 PM 26° Partly Cloudy 48% 4 mph ESE 95%
9 PM 24° Partly Cloudy 29% 3 mph SE 97%
10 PM 24° Partly Cloudy 12% 3 mph SE 98%
11 PM 24° Partly Cloudy 8% 2 mph ESE 98%
12 AM 24° Fog 6% 2 mph E 97%
1 AM 23° Fog 6% 2 mph E 97%
2 AM 23° Fog 18% 2 mph ESE 97%
15-Day Forecast
Today
7/19
Rain
90%
22°
33°
Mon
7/20
Haze
20%
22°
36°
Tue
7/21
Clear
21%
21°
38°
Wed
7/22
Mostly Clear
37%
17°
29°
Thu
7/23
Clear
51%
16°
30°
Fri
7/24
Heavy Rain
90%
17°
32°
Sat
7/25
Drizzle
53%
16°
31°
Sun
7/26
Clear
18%
18°
35°
Mon
7/27
Thunderstorm
44%
19°
38°
Tue
7/28
Clear
44%
23°
37°
Wed
7/29
Drizzle
60%
21°
36°
Thu
7/30
Drizzle
60%
21°
36°
Fri
7/31
Drizzle
60%
22°
37°
Sat
8/1
Drizzle
60%
22°
37°
Sun
8/2
Clear
60%
21°
36°
51
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
51 AQI 9.3 µg/m³
O3
Ground-level ozone
25 AQI 28 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 51 Moderate 25 51
Mon 56 Moderate 38 56
Tue 63 Moderate 32 63
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 Sun Jul 19, 07:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE471 J/kg
MLCAPE771 J/kg
MUCAPE995 J/kg
SBCIN-157 J/kg
MLCIN0 J/kg
Lifted Index-1.6
Kinematics
0–6 km Shear9 kt
0–1 km Shear13 kt
Eff. Shear9 kt
0–1 km SRH17
0–3 km SRH5
Eff. SRH5
Storm Motion300° @ 22 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.4
Thermo & Levels
PWAT1.92 in
0–3 km LR4.7 °C/km
700–500 LR5.5 °C/km
Total Totals44.5
LCL964 hPa
LFC784 hPa
EL218 hPa
Freezing Lvl15,817 ft