Flood Warning — Polk County, IA Areal Flood Warning — Boone County, IA, Jasper County, IA, Marshall County, IA, Polk County, IA, Story County, IA 6:15 PM Flood Warning — Polk County, IA, Story County, IA 2:51 PM Flood Watch 7:00 PM Flood Warning — Jasper County, IA, Marion County, IA, Polk County, IA, Story County, IA, Black Hawk County, IA 3:15 AM Flood Watch 7:00 PM

Polk County, Iowa, United States

Last updated: 5:08 PM CDT  ·  Refresh
28°C
Feels like 31°
Mostly Cloudy
▲ 29°  /  ▼ 19°
Wind
5 mph NNW
Humidity
70%
Dew Point
22°
Pressure
29.01 inHg
Visibility
10 mi
UV Index
5.4
Cloud Cover
69%
Sunrise
5:45 AM
Sunset
8:51 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Polk County is currently mostly cloudy at 28°C. Precipitation is likely — peak probability 57% around 5 PM. Atmospheric instability is elevated (CAPE up to 2769 J/kg) — isolated convective development possible. Sunrise: 5:45AM · Sunset: 8:51PM.

Alerts

Flood Warning
Polk County, IA
Expires
Areal Flood Warning
Boone County, IA, Jasper County, IA, Marshall County, IA, Polk County, IA, Story County, IA
Expires 6:15 PM
Flood Warning
Polk County, IA, Story County, IA
Expires 2:51 PM
Flood Watch
Expires 7:00 PM
Flood Warning
Jasper County, IA, Marion County, IA, Polk County, IA, Story County, IA, Black Hawk County, IA
Expires 3:15 AM
Flood Watch
Expires 7:00 PM
44 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
28°
28%
6 PM
29°
40%
7 PM
28°
26%
8 PM
28°
26%
9 PM
26°
26%
10 PM
24°
34%
11 PM
24°
37%
12 AM
23°
31%
1 AM
23°
19%
2 AM
22°
19%
3 AM
22°
20%
4 AM
21°
20%
5 AM
21°
20%
6 AM
19°
19%
7 AM
19°
21%
8 AM
21°
33%
9 AM
22°
35%
10 AM
23°
36%
11 AM
24°
36%
12 PM
26°
37%
1 PM
27°
37%
2 PM
27°
38%
3 PM
27°
38%
4 PM
28°
50%
7-Day Forecast
Today
29° 19°
Mostly Cloudy with a 37% chance of rain.
Sun
29° 19°
Partly Cloudy with a 57% chance of rain.
Mon
28° 18°
Mostly Clear with a 20% chance of rain.
Tue
29° 18°
Mostly Clear.
Wed
29° 19°
Rain, 64% chance.
Thu
27° 19°
Drizzle, 52% chance.
Fri
28° 18°
Partly Cloudy with a 30% chance of rain.
TimeTempConditionsPrecipWindHumidity
Now 28° Mostly Cloudy 28% 5 mph NNW 70%
6 PM 29° Mostly Cloudy 40% 3 mph NNE 73%
7 PM 28° Mostly Cloudy 26% 4 mph NE 75%
8 PM 28° Mostly Cloudy 26% 2 mph ENE 78%
9 PM 26° Mostly Cloudy 26% 3 mph ENE 82%
10 PM 24° Mostly Cloudy 34% 3 mph NE 84%
11 PM 24° Mostly Cloudy 37% 3 mph NNE 86%
12 AM 23° Mostly Cloudy 31% 4 mph NNE 87%
1 AM 23° Mostly Cloudy 19% 4 mph NE 88%
2 AM 22° Mostly Cloudy 19% 4 mph NE 90%
3 AM 22° Mostly Cloudy 20% 3 mph NNE 92%
4 AM 21° Mostly Cloudy 20% 4 mph N 94%
5 AM 21° Mostly Cloudy 20% 4 mph N 94%
6 AM 19° Partly Cloudy 19% 4 mph N 95%
7 AM 19° Fog 21% 4 mph NNE 95%
8 AM 21° Partly Cloudy 33% 4 mph NNE 90%
9 AM 22° Partly Cloudy 35% 5 mph NE 85%
10 AM 23° Partly Cloudy 36% 6 mph NE 81%
11 AM 24° Partly Cloudy 36% 6 mph NE 78%
12 PM 26° Partly Cloudy 37% 6 mph NE 76%
1 PM 27° Partly Cloudy 37% 6 mph NE 73%
2 PM 27° Partly Cloudy 38% 6 mph NE 72%
3 PM 27° Partly Cloudy 38% 6 mph NE 71%
4 PM 28° Partly Cloudy 50% 6 mph NE 71%
15-Day Forecast
Today
7/4
Mostly Cloudy
37%
19°
29°
Sun
7/5
Partly Cloudy
57%
19°
29°
Mon
7/6
Mostly Clear
20%
18°
28°
Tue
7/7
Mostly Clear
16%
18°
29°
Wed
7/8
Rain
64%
19°
29°
Thu
7/9
Drizzle
52%
19°
27°
Fri
7/10
Partly Cloudy
30%
18°
28°
Sat
7/11
Clear
42%
17°
29°
Sun
7/12
Clear
43%
16°
28°
Mon
7/13
Mostly Cloudy
21%
17°
29°
Tue
7/14
Mostly Cloudy
25%
18°
28°
Wed
7/15
Drizzle
60%
17°
28°
Thu
7/16
Drizzle
60%
17°
27°
Fri
7/17
Drizzle
60%
17°
27°
Sat
7/18
Drizzle
60%
18°
28°
44
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
23 AQI 4.3 µg/m³
O3
Ground-level ozone
Dominant
44 AQI 48 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Sun 44 Good 44 23
Mon 36 Good 33 36
Tue 49 Good 38 49
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 Sat Jul 4, 20:00'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
SBCAPE2642 J/kg
MLCAPE1755 J/kg
MUCAPE2642 J/kg
SBCIN-7 J/kg
MLCIN0 J/kg
Lifted Index-7.1
Kinematics
0–6 km Shear7 kt
0–1 km Shear3 kt
Eff. Shear6 kt
0–1 km SRH-10
0–3 km SRH-7
Eff. SRH-7
Storm Motion260° @ 15 kt
0–1 km EHI-0.2
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.7
Thermo & Levels
PWAT1.73 in
0–3 km LR7.0 °C/km
700–500 LR6.2 °C/km
Total Totals48.2
LCL896 hPa
LFC878 hPa
EL174 hPa
Freezing Lvl13,153 ft