Severe Thunderstorm Watch 9:00 PM Excessive Heat Watch 7:00 PM Extreme Heat Warning — Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Inland Glynn, GA, Coastal Glynn, GA, Echols, GA, Clinch, GA, Inland Camden, GA, Coastal Camden, GA, Northeastern Charlton, GA, Southern Ware, GA, Western Charlton, GA 7:00 PM

Union County, Florida, United States

Last updated: 5:17 PM CDT  ·  Refresh
33°C
Feels like 41°
Mostly Cloudy
▲ 37°  /  ▼ 23°
Wind
12 mph SW
Humidity
60%
Dew Point
25°
Pressure
29.67 inHg
Visibility
10 mi
UV Index
4.3
Cloud Cover
64%
Sunrise
6:46 AM
Sunset
8:24 PM
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WeatherAI™ Analysis

WeatherAI Analysis: Union County is currently mostly cloudy at 34°C. Precipitation is likely — peak probability 75% around 6 PM. Atmospheric instability is elevated (CAPE up to 3101 J/kg) — isolated convective development possible. Sunrise: 6:46AM · Sunset: 8:24PM.

Alerts

Severe Thunderstorm Watch
Expires 9:00 PM
Excessive Heat Watch
Expires 7:00 PM
Extreme Heat Warning
Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Inland Glynn, GA, Coastal Glynn, GA, Echols, GA, Clinch, GA, Inland Camden, GA, Coastal Camden, GA, Northeastern Charlton, GA, Southern Ware, GA, Western Charlton, GA
Expires 7:00 PM
59 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
33°
42%
7 PM
32°
45%
8 PM
30°
45%
9 PM
29°
44%
10 PM
28°
44%
11 PM
28°
43%
12 AM
27°
33%
1 AM
27°
40%
2 AM
26°
32%
3 AM
26°
47%
4 AM
26°
33%
5 AM
25°
22%
6 AM
23°
22%
7 AM
23°
23%
8 AM
24°
38%
9 AM
25°
47%
10 AM
27°
50%
11 AM
28°
50%
12 PM
28°
53%
1 PM
30°
58%
2 PM
33°
59%
3 PM
33°
59%
4 PM
32°
67%
5 PM
32°
67%
7-Day Forecast
Tonight
37° 23°
Mostly Cloudy with a 44% chance of rain.
Thu
37° 23°
Partly Cloudy with a 74% chance of rain.
Fri
38° 23°
Partly Cloudy with a 77% chance of rain.
Sat
36° 22°
Heavy Rain, 83% chance.
Sun
36° 22°
Rain, 82% chance.
Mon
35° 21°
Rain, 90% chance.
Tue
36° 22°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 33° Mostly Cloudy 42% 12 mph SW 60%
7 PM 32° Overcast 45% 10 mph WSW 69%
8 PM 30° Rain 45% 9 mph WSW 74%
9 PM 29° Overcast 44% 7 mph SW 78%
10 PM 28° Overcast 44% 7 mph SW 81%
11 PM 28° Overcast 43% 7 mph SW 84%
12 AM 27° Overcast 33% 7 mph SW 86%
1 AM 27° Overcast 40% 6 mph WSW 87%
2 AM 26° Overcast 32% 6 mph WSW 88%
3 AM 26° Mostly Cloudy 47% 5 mph WSW 86%
4 AM 26° Mostly Cloudy 33% 5 mph WSW 85%
5 AM 25° Mostly Cloudy 22% 6 mph W 83%
6 AM 23° Drizzle 22% 5 mph WSW 82%
7 AM 23° Mostly Cloudy 23% 5 mph WSW 80%
8 AM 24° Partly Cloudy 38% 6 mph WSW 77%
9 AM 25° Partly Cloudy 47% 7 mph WSW 73%
10 AM 27° Partly Cloudy 50% 8 mph WSW 69%
11 AM 28° Mostly Clear 50% 8 mph SW 67%
12 PM 28° Partly Cloudy 53% 9 mph SW 67%
1 PM 30° Partly Cloudy 58% 10 mph SW 67%
2 PM 33° Partly Cloudy 59% 10 mph SW 66%
3 PM 33° Partly Cloudy 59% 10 mph SW 65%
4 PM 32° Mostly Clear 67% 10 mph SW 64%
5 PM 32° Mostly Clear 67% 9 mph SW 65%
15-Day Forecast
Today
7/29
Mostly Cloudy
44%
23°
37°
Thu
7/30
Partly Cloudy
74%
23°
37°
Fri
7/31
Partly Cloudy
77%
23°
38°
Sat
8/1
Heavy Rain
83%
22°
36°
Sun
8/2
Rain
82%
22°
36°
Mon
8/3
Rain
90%
21°
35°
Tue
8/4
Rain
82%
22°
36°
Wed
8/5
Rain
82%
22°
37°
Thu
8/6
Drizzle
60%
22°
37°
Fri
8/7
Drizzle
60%
22°
38°
Sat
8/8
Drizzle
72%
22°
37°
Sun
8/9
Drizzle
60%
24°
38°
Mon
8/10
Drizzle
60%
24°
38°
Tue
8/11
Drizzle
60%
24°
38°
Wed
8/12
Drizzle
60%
24°
38°
59
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
59 AQI 13.5 µg/m³
O3
Ground-level ozone
32 AQI 36 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Thu 59 Moderate 32 59
Fri 58 Moderate 31 58
Sat 60 Moderate 37 60
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 Wed Jul 29, 21:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3839 J/kg
MLCAPE2920 J/kg
MUCAPE3839 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-8.5
Kinematics
0–6 km Shear13 kt
0–1 km Shear5 kt
Eff. Shear17 kt
0–1 km SRH2
0–3 km SRH-13
Eff. SRH-13
Storm Motion268° @ 22 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index31.7
Thermo & Levels
PWAT2.14 in
0–3 km LR6.9 °C/km
700–500 LR6.5 °C/km
Total Totals48.9
LCL886 hPa
LFC1005 hPa
EL133 hPa
Freezing Lvl15,896 ft