Excessive Heat Warning — Jefferson, IL, Wayne, IL, Edwards, IL, Wabash, IL, Perry, IL, Franklin, IL, Hamilton, IL, White, IL, Jackson, IL, Williamson, IL, Saline, IL, Gallatin, IL, Union, IL, Johnson, IL, Pope, IL, Hardin, IL, Alexander, IL, Pulaski, IL, Massac, IL, Gibson, IN, Pike, IN, Posey, IN, Vanderburgh, IN, Warrick, IN, Spencer, IN, Fulton, KY, Hickman, KY, Carlisle, KY, Ballard, KY, McCracken, KY, Graves, KY, Livingston, KY, Marshall, KY, Calloway, KY, Crittenden, KY, Lyon, KY, Trigg, KY, Caldwell, KY, Union, KY, Webster, KY, Hopkins, KY, Christian, KY, Henderson, KY, Daviess, KY, McLean, KY, Muhlenberg, KY, Todd, KY, Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO 8:00 PM

Alexander County, Illinois, United States

Last updated: 2:24 AM CDT  ·  Refresh
79°F
Feels like 86°
Clear
▲ 99°  /  ▼ 73°
Wind
2 mph SE
Humidity
80%
Dew Point
74°
Pressure
29.53 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
0%
Sunrise
6:30 AM
Sunset
7:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Alexander County is currently clear at 79°F. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 2291 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:21PM.

Alerts

Excessive Heat Warning
Jefferson, IL, Wayne, IL, Edwards, IL, Wabash, IL, Perry, IL, Franklin, IL, Hamilton, IL, White, IL, Jackson, IL, Williamson, IL, Saline, IL, Gallatin, IL, Union, IL, Johnson, IL, Pope, IL, Hardin, IL, Alexander, IL, Pulaski, IL, Massac, IL, Gibson, IN, Pike, IN, Posey, IN, Vanderburgh, IN, Warrick, IN, Spencer, IN, Fulton, KY, Hickman, KY, Carlisle, KY, Ballard, KY, McCracken, KY, Graves, KY, Livingston, KY, Marshall, KY, Calloway, KY, Crittenden, KY, Lyon, KY, Trigg, KY, Caldwell, KY, Union, KY, Webster, KY, Hopkins, KY, Christian, KY, Henderson, KY, Daviess, KY, McLean, KY, Muhlenberg, KY, Todd, KY, Perry, MO, Bollinger, MO, Cape Girardeau, MO, Wayne, MO, Carter, MO, Ripley, MO, Butler, MO, Stoddard, MO, Scott, MO, Mississippi, MO, New Madrid, MO
Expires 8:00 PM
52 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
79°
13%
3 AM
78°
13%
4 AM
77°
4%
5 AM
74°
4%
6 AM
74°
4%
7 AM
75°
4%
8 AM
79°
9%
9 AM
86°
9%
10 AM
90°
15%
11 AM
92°
15%
12 PM
94°
20%
1 PM
98°
30%
2 PM
98°
31%
3 PM
98°
21%
4 PM
98°
14%
5 PM
98°
14%
6 PM
96°
5%
7 PM
94°
5%
8 PM
92°
5%
9 PM
83°
5%
10 PM
82°
19%
11 PM
81°
19%
12 AM
80°
19%
1 AM
81°
20%
7-Day Forecast
Today
99° 73°
Clear with a 31% chance of rain.
Sat
103° 73°
Mostly Clear with a 49% chance of rain.
Sun
101° 67°
Mostly Clear.
Mon
92° 58°
Mostly Clear.
Tue
101° 65°
Clear.
Wed
106° 72°
Clear with a 28% chance of rain.
Thu
102° 68°
Rain, 27% chance.
TimeTempConditionsPrecipWindHumidity
Now 79° Clear 13% 2 mph SE 80%
3 AM 78° Clear 13% 2 mph SW 80%
4 AM 77° Clear 4% 3 mph SW 82%
5 AM 74° Clear 4% 3 mph S 83%
6 AM 74° Clear 4% 3 mph S 84%
7 AM 75° Clear 4% 3 mph S 82%
8 AM 79° Clear 9% 3 mph S 74%
9 AM 86° Clear 9% 3 mph S 64%
10 AM 90° Clear 15% 3 mph SSW 56%
11 AM 92° Clear 15% 3 mph SSW 50%
12 PM 94° Mostly Clear 20% 3 mph SSW 46%
1 PM 98° Mostly Clear 30% 4 mph SSW 42%
2 PM 98° Clear 31% 4 mph S 42%
3 PM 98° Clear 21% 4 mph S 41%
4 PM 98° Clear 14% 5 mph S 42%
5 PM 98° Clear 14% 5 mph S 46%
6 PM 96° Clear 5% 5 mph SSE 52%
7 PM 94° Clear 5% 4 mph SSE 56%
8 PM 92° Clear 5% 4 mph S 59%
9 PM 83° Clear 5% 4 mph S 62%
10 PM 82° Clear 19% 4 mph S 64%
11 PM 81° Clear 19% 4 mph S 66%
12 AM 80° Clear 19% 4 mph S 68%
1 AM 81° Clear 20% 3 mph S 69%
15-Day Forecast
Today
9/4
Clear
31%
73°
99°
Sat
9/5
Mostly Clear
49%
73°
103°
Sun
9/6
Mostly Clear
13%
67°
101°
Mon
9/7
Mostly Clear
3%
58°
92°
Tue
9/8
Clear
3%
65°
101°
Wed
9/9
Clear
28%
72°
106°
Thu
9/10
Rain
27%
68°
102°
Fri
9/11
Drizzle
68%
65°
103°
Sat
9/12
Rain
44%
70°
109°
Sun
9/13
Drizzle
44%
65°
101°
Mon
9/14
Clear
25%
70°
99°
Tue
9/15
Drizzle
60%
72°
100°
Wed
9/16
Drizzle
60%
71°
99°
Thu
9/17
Drizzle
60%
68°
95°
Fri
9/18
Clear
25%
67°
94°
52
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
52 AQI 9.5 µg/m³
O3
Ground-level ozone
47 AQI 52 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 52 Moderate 47 52
Sat 58 Moderate 48 58
Sun 55 Moderate 44 55
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 Sep 4, 06:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE1087 J/kg
MLCAPE917 J/kg
MUCAPE1087 J/kg
SBCIN-308 J/kg
MLCIN-147 J/kg
Lifted Index-3.1
Kinematics
0–6 km Shear2 kt
0–1 km Shear11 kt
Eff. Shear7 kt
0–1 km SRH6
0–3 km SRH0
Eff. SRH-3
Storm Motion18° @ 8 kt
0–1 km EHI0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index35.6
Thermo & Levels
PWAT1.75 in
0–3 km LR5.1 °C/km
700–500 LR5.5 °C/km
Total Totals46.4
LCL961 hPa
LFC749 hPa
EL210 hPa
Freezing Lvl16,325 ft