Severe Thunderstorm Watch 9:00 PM

Gallatin County, Illinois, United States

Last updated: 8:34 PM CDT  ·  Refresh
27°C
Feels like 30°
Mostly Clear
▲ 33°  /  ▼ 19°
Wind
6 mph NNW
Humidity
78%
Dew Point
22°
Pressure
29.42 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
16%
Sunrise
5:47 AM
Sunset
8:10 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Gallatin County is currently mostly clear at 27°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 546 J/kg) — isolated convective development possible. Sunrise: 5:47AM · Sunset: 8:10PM.

Alerts

Severe Thunderstorm Watch
Expires 9:00 PM
47 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
27°
11%
9 PM
26°
14%
10 PM
25°
14%
11 PM
24°
14%
12 AM
23°
7%
1 AM
22°
3%
2 AM
21°
3%
3 AM
21°
3%
4 AM
20°
4%
5 AM
19°
5%
6 AM
19°
5%
7 AM
20°
5%
8 AM
22°
5%
9 AM
24°
5%
10 AM
24°
5%
11 AM
26°
5%
12 PM
26°
5%
1 PM
28°
5%
2 PM
27°
5%
3 PM
28°
5%
4 PM
27°
3%
5 PM
27°
3%
6 PM
27°
3%
7 PM
26°
3%
7-Day Forecast
Tonight
33° 19°
Clear.
Wed
29° 17°
Partly Cloudy.
Thu
27° 14°
Clear.
Fri
23° 16°
Overcast with a 57% chance of rain.
Sat
29° 18°
Partly Cloudy with a 58% chance of rain.
Sun
34° 22°
Clear with a 30% chance of rain.
Mon
34° 23°
Clear with a 31% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 27° Mostly Clear 11% 6 mph NNW 78%
9 PM 26° Mostly Clear 14% 6 mph NNW 81%
10 PM 25° Clear 14% 6 mph NNW 83%
11 PM 24° Clear 14% 6 mph NNW 85%
12 AM 23° Clear 7% 6 mph NNW 86%
1 AM 22° Clear 3% 6 mph NNW 88%
2 AM 21° Clear 3% 6 mph NNW 90%
3 AM 21° Clear 3% 6 mph NW 91%
4 AM 20° Clear 4% 5 mph NW 92%
5 AM 19° Clear 5% 6 mph NNW 92%
6 AM 19° Clear 5% 6 mph NNW 92%
7 AM 20° Clear 5% 7 mph N 89%
8 AM 22° Mostly Clear 5% 8 mph NNE 85%
9 AM 24° Mostly Clear 5% 8 mph NNE 81%
10 AM 24° Partly Cloudy 5% 9 mph NNE 77%
11 AM 26° Partly Cloudy 5% 10 mph NNE 73%
12 PM 26° Mostly Cloudy 5% 10 mph NNE 70%
1 PM 28° Mostly Cloudy 5% 10 mph NNE 68%
2 PM 27° Partly Cloudy 5% 11 mph NNE 66%
3 PM 28° Partly Cloudy 5% 11 mph NNE 66%
4 PM 27° Partly Cloudy 3% 11 mph NNE 67%
5 PM 27° Partly Cloudy 3% 10 mph NNE 69%
6 PM 27° Partly Cloudy 3% 10 mph NNE 72%
7 PM 26° Partly Cloudy 3% 10 mph NNE 74%
15-Day Forecast
Today
7/21
Clear
14%
19°
33°
Wed
7/22
Partly Cloudy
5%
17°
29°
Thu
7/23
Clear
3%
14°
27°
Fri
7/24
Overcast
57%
16°
23°
Sat
7/25
Partly Cloudy
58%
18°
29°
Sun
7/26
Clear
30%
22°
34°
Mon
7/27
Clear
31%
23°
34°
Tue
7/28
Rain
28%
19°
32°
Wed
7/29
Drizzle
44%
18°
29°
Thu
7/30
Drizzle
44%
15°
29°
Fri
7/31
Clear
36%
16°
29°
Sat
8/1
Drizzle
60%
18°
30°
Sun
8/2
Drizzle
60%
19°
31°
Mon
8/3
Drizzle
60%
19°
31°
Tue
8/4
Drizzle
60%
20°
31°
47
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
47 AQI 8.6 µg/m³
O3
Ground-level ozone
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 47 Good 31 47
Thu 28 Good 28 17
Fri 34 Good 34 12
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 Jul 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE66 J/kg
MLCAPE9 J/kg
MUCAPE66 J/kg
SBCIN-253 J/kg
MLCIN0 J/kg
Lifted Index-0.3
Kinematics
0–6 km Shear41 kt
0–1 km Shear11 kt
Eff. Shear—
0–1 km SRH-91
0–3 km SRH-99
Eff. SRH—
Storm Motion272° @ 32 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index7.3
Thermo & Levels
PWAT1.38 in
0–3 km LR5.1 °C/km
700–500 LR5.5 °C/km
Total Totals39.7
LCL919 hPa
LFC576 hPa
EL229 hPa
Freezing Lvl16,837 ft