Severe Thunderstorm Watch 10:00 PM

Winnebago County, Illinois, United States

Last updated: 9:12 PM CDT  ·  Refresh
20°C
Feels like 21°
Mostly Cloudy
▲ 24°  /  ▼ 14°
Wind
7 mph WSW
Humidity
95%
Dew Point
19°
Pressure
29.08 inHg
Visibility
4 mi
UV Index
0.0
Cloud Cover
63%
Sunrise
6:10 AM
Sunset
7:48 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Winnebago County is currently mostly cloudy at 20°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1038 J/kg) — isolated convective development possible. Sunrise: 6:10AM · Sunset: 7:48PM.

Alerts

Severe Thunderstorm Watch
Expires 10:00 PM
48 AQI · Good Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
20°
25%
10 PM
19°
26%
11 PM
18°
17%
12 AM
18°
18%
1 AM
18°
5%
2 AM
17°
6%
3 AM
17°
3%
4 AM
16°
4%
5 AM
14°
4%
6 AM
14°
17%
7 AM
14°
17%
8 AM
16°
17%
9 AM
19°
5%
10 AM
21°
8%
11 AM
22°
11%
12 PM
24°
19%
1 PM
26°
20%
2 PM
26°
20%
3 PM
26°
5%
4 PM
27°
5%
5 PM
26°
5%
6 PM
25°
5%
7 PM
24°
3%
8 PM
23°
3%
7-Day Forecast
Tonight
24° 14°
Mostly Cloudy with a 25% chance of rain.
Sat
27° 14°
Mostly Clear.
Sun
23° 11°
Clear.
Mon
22° 9°
Mostly Cloudy with a 44% chance of rain.
Tue
24° 11°
Drizzle, 64% chance.
Wed
27° 14°
Rain, 64% chance.
Thu
26° 16°
Clear.
TimeTempConditionsPrecipWindHumidity
Now 20° Mostly Cloudy 25% 7 mph WSW 95%
10 PM 19° Clear 26% 5 mph SSW 95%
11 PM 18° Mostly Clear 17% 5 mph WSW 95%
12 AM 18° Mostly Clear 18% 6 mph WNW 95%
1 AM 18° Mostly Clear 5% 7 mph WNW 95%
2 AM 17° Mostly Clear 6% 7 mph NW 95%
3 AM 17° Mostly Clear 3% 7 mph NW 95%
4 AM 16° Partly Cloudy 4% 7 mph NW 95%
5 AM 14° Partly Cloudy 4% 7 mph NW 94%
6 AM 14° Partly Cloudy 17% 6 mph NW 94%
7 AM 14° Partly Cloudy 17% 6 mph NW 93%
8 AM 16° Partly Cloudy 17% 7 mph NW 89%
9 AM 19° Fog 5% 8 mph NW 84%
10 AM 21° Fog 8% 9 mph NW 79%
11 AM 22° Mostly Clear 11% 11 mph NW 72%
12 PM 24° Mostly Clear 19% 13 mph NW 64%
1 PM 26° Mostly Clear 20% 14 mph NW 59%
2 PM 26° Mostly Clear 20% 14 mph NW 56%
3 PM 26° Clear 5% 14 mph NW 54%
4 PM 27° Clear 5% 14 mph NW 54%
5 PM 26° Clear 5% 12 mph NW 58%
6 PM 25° Clear 5% 11 mph NW 63%
7 PM 24° Clear 3% 10 mph NW 66%
8 PM 23° Mostly Clear 3% 10 mph NW 69%
15-Day Forecast
Today
8/21
Mostly Cloudy
25%
14°
24°
Sat
8/22
Mostly Clear
19%
14°
27°
Sun
8/23
Clear
3%
11°
23°
Mon
8/24
Mostly Cloudy
44%
9°
22°
Tue
8/25
Drizzle
64%
11°
24°
Wed
8/26
Rain
64%
14°
27°
Thu
8/27
Clear
17%
16°
26°
Fri
8/28
Clear
17%
16°
26°
Sat
8/29
Drizzle
68%
15°
27°
Sun
8/30
Rain
68%
18°
27°
Mon
8/31
Drizzle
60%
18°
29°
Tue
9/1
Drizzle
60%
17°
29°
Wed
9/2
Drizzle
60%
17°
26°
Thu
9/3
Drizzle
60%
16°
26°
Fri
9/4
Drizzle
60%
16°
26°
48
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
48 AQI 8.6 µg/m³
O3
Ground-level ozone
34 AQI 38 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 48 Good 34 48
Sun 27 Good 27 24
Mon 22 Good 22 16
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 Fri Aug 21, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE756 J/kg
MLCAPE1702 J/kg
MUCAPE2279 J/kg
SBCIN-158 J/kg
MLCIN-53 J/kg
Lifted Index-2.3
Kinematics
0–6 km Shear31 kt
0–1 km Shear17 kt
Eff. Shear30 kt
0–1 km SRH67
0–3 km SRH61
Eff. SRH61
Storm Motion338° @ 20 kt
0–1 km EHI0.3
Composite Parameters
Sig. Tornado0.2
STP (eff)0.3
Supercell2.1
K-Index38.1
Thermo & Levels
PWAT1.54 in
0–3 km LR5.2 °C/km
700–500 LR5.9 °C/km
Total Totals50.3
LCL976 hPa
LFC778 hPa
EL245 hPa
Freezing Lvl12,388 ft