Excessive Heat Warning — Buchanan, IA, Delaware, IA, Dubuque, IA, Benton, IA, Linn, IA, Jones, IA, Jackson, IA, Iowa, IA, Johnson, IA, Cedar, IA, Clinton, IA, Muscatine, IA, Scott, IA, Keokuk, IA, Washington, IA, Louisa, IA, Jefferson, IA, Henry, IA, Des Moines, IA, Van Buren, IA, Lee, IA, Whiteside, IL, Rock Island, IL, Henry, IL, Bureau, IL, Putnam, IL, Mercer, IL, Henderson, IL, Warren, IL, Hancock, IL, McDonough, IL, Scotland, MO, Clark, MO 9:00 PM Extreme Heat Watch 10:00 PM

Linn County, Iowa, United States

Last updated: 7:44 AM CDT  ·  Refresh
25°C
Feels like 29°
Fog
▲ 36°  /  ▼ 24°
Wind
4 mph S
Humidity
95%
Dew Point
24°
Pressure
29.00 inHg
Visibility
1 mi
UV Index
2.5
Cloud Cover
86%
Sunrise
5:53 AM
Sunset
8:31 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Linn County is currently fog at 25°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 3511 J/kg) — isolated convective development possible. Sunrise: 5:53AM · Sunset: 8:31PM.

Alerts

Excessive Heat Warning
Buchanan, IA, Delaware, IA, Dubuque, IA, Benton, IA, Linn, IA, Jones, IA, Jackson, IA, Iowa, IA, Johnson, IA, Cedar, IA, Clinton, IA, Muscatine, IA, Scott, IA, Keokuk, IA, Washington, IA, Louisa, IA, Jefferson, IA, Henry, IA, Des Moines, IA, Van Buren, IA, Lee, IA, Whiteside, IL, Rock Island, IL, Henry, IL, Bureau, IL, Putnam, IL, Mercer, IL, Henderson, IL, Warren, IL, Hancock, IL, McDonough, IL, Scotland, MO, Clark, MO
Expires 9:00 PM
Extreme Heat Watch
Expires 10:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
25°
19%
8 AM
26°
38%
9 AM
27°
29%
10 AM
29°
28%
11 AM
31°
7%
12 PM
32°
3%
1 PM
34°
3%
2 PM
35°
3%
3 PM
36°
3%
4 PM
36°
3%
5 PM
36°
3%
6 PM
35°
3%
7 PM
33°
5%
8 PM
32°
5%
9 PM
30°
8%
10 PM
29°
17%
11 PM
28°
17%
12 AM
28°
17%
1 AM
27°
17%
2 AM
26°
17%
3 AM
26°
12%
4 AM
25°
9%
5 AM
25°
9%
6 AM
25°
5%
7-Day Forecast
Today
36° 24°
Partly Cloudy with a 28% chance of rain.
Mon
35° 24°
Mostly Clear.
Tue
30° 21°
Mostly Clear.
Wed
29° 18°
Partly Cloudy with a 47% chance of rain.
Thu
29° 17°
Drizzle, 51% chance.
Fri
27° 19°
Rain, 82% chance.
Sat
28° 18°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 25° Fog 19% 4 mph S 95%
8 AM 26° Mostly Cloudy 38% 4 mph S 91%
9 AM 27° Partly Cloudy 29% 4 mph S 87%
10 AM 29° Partly Cloudy 28% 4 mph S 81%
11 AM 31° Partly Cloudy 7% 4 mph SSW 74%
12 PM 32° Partly Cloudy 3% 5 mph SW 67%
1 PM 34° Partly Cloudy 3% 5 mph SW 64%
2 PM 35° Partly Cloudy 3% 5 mph WSW 60%
3 PM 36° Partly Cloudy 3% 5 mph WSW 57%
4 PM 36° Partly Cloudy 3% 4 mph WSW 58%
5 PM 36° Partly Cloudy 3% 4 mph SW 60%
6 PM 35° Partly Cloudy 3% 4 mph SSW 64%
7 PM 33° Partly Cloudy 5% 4 mph S 70%
8 PM 32° Partly Cloudy 5% 5 mph SSE 75%
9 PM 30° Partly Cloudy 8% 6 mph S 80%
10 PM 29° Partly Cloudy 17% 7 mph S 80%
11 PM 28° Partly Cloudy 17% 7 mph S 79%
12 AM 28° Partly Cloudy 17% 7 mph SSW 77%
1 AM 27° Partly Cloudy 17% 6 mph S 79%
2 AM 26° Partly Cloudy 17% 6 mph S 84%
3 AM 26° Partly Cloudy 12% 7 mph SSE 87%
4 AM 25° Partly Cloudy 9% 7 mph SSE 88%
5 AM 25° Partly Cloudy 9% 8 mph SSE 89%
6 AM 25° Partly Cloudy 5% 9 mph S 89%
15-Day Forecast
Today
7/26
Partly Cloudy
28%
24°
36°
Mon
7/27
Mostly Clear
17%
24°
35°
Tue
7/28
Mostly Clear
14%
21°
30°
Wed
7/29
Partly Cloudy
47%
18°
29°
Thu
7/30
Drizzle
51%
17°
29°
Fri
7/31
Rain
82%
19°
27°
Sat
8/1
Rain
63%
18°
28°
Sun
8/2
Clear
18%
17°
29°
Mon
8/3
Drizzle
44%
18°
31°
Tue
8/4
Drizzle
44%
19°
32°
Wed
8/5
Drizzle
60%
18°
31°
Thu
8/6
Drizzle
60%
17°
28°
Fri
8/7
Drizzle
60%
17°
30°
Sat
8/8
Drizzle
60%
19°
31°
Sun
8/9
Drizzle
60%
19°
33°
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 11.9 µg/m³
O3
Ground-level ozone
38 AQI 41 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Mon 56 Moderate 38 56
Tue 49 Good 42 49
Wed 57 Moderate 37 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 Sun Jul 26, 11:00'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
SBCAPE2344 J/kg
MLCAPE2642 J/kg
MUCAPE3309 J/kg
SBCIN-288 J/kg
MLCIN0 J/kg
Lifted Index-6.7
Kinematics
0–6 km Shear25 kt
0–1 km Shear23 kt
Eff. Shear37 kt
0–1 km SRH-193
0–3 km SRH-374
Eff. SRH-398
Storm Motion276° @ 30 kt
0–1 km EHI-2.8
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index25.9
Thermo & Levels
PWAT1.80 in
0–3 km LR4.0 °C/km
700–500 LR7.5 °C/km
Total Totals47.7
LCL971 hPa
LFC687 hPa
EL174 hPa
Freezing Lvl14,879 ft