Heat Advisory — Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA 7:00 PM Extreme Heat Warning — Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA 7:00 PM

Union County, Florida, United States

Last updated: 2:57 PM CDT  ·  Refresh
36°C
Feels like 42°
Partly Cloudy
▲ 36°  /  ▼ 24°
Wind
9 mph W
Humidity
51%
Dew Point
23°
Pressure
29.87 inHg
Visibility
10 mi
UV Index
8.0
Cloud Cover
42%
Sunrise
6:58 AM
Sunset
8:08 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Union County is currently partly cloudy at 36°C. Precipitation is likely — peak probability 58% around 3 PM. Atmospheric instability is elevated (CAPE up to 3121 J/kg) — isolated convective development possible. Sunrise: 6:58AM · Sunset: 8:08PM.

Alerts

Heat Advisory
Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA
Expires 7:00 PM
Extreme Heat Warning
Suwannee, FL, Baker, FL, Inland Nassau, FL, Union, FL, Bradford, FL, Gilchrist, FL, Inland Flagler, FL, Eastern Hamilton, FL, Coastal Nassau, FL, Coastal Duval, FL, Eastern Clay, FL, Eastern Alachua, FL, Eastern Putnam, FL, Coastal Flagler, FL, Eastern Marion, FL, Western Hamilton, FL, Trout River, FL, Western Clay, FL, Northeast Coastal St. Johns, FL, Western Alachua, FL, Western Putnam, FL, Central Marion, FL, Northern Columbia, FL, South Central Duval, FL, Southeast Coastal St. Johns, FL, Western Marion, FL, Southeastern Columbia, FL, Western Duval, FL, Northern Inland St. Johns, FL, Southwestern Columbia, FL, Southern Inland St. Johns, FL, Western St. Johns, FL, Echols, GA
Expires 7:00 PM
56 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
17%
4 PM
36°
28%
5 PM
36°
33%
6 PM
34°
33%
7 PM
33°
18%
8 PM
32°
18%
9 PM
29°
18%
10 PM
28°
18%
11 PM
28°
19%
12 AM
27°
14%
1 AM
27°
8%
2 AM
26°
8%
3 AM
26°
9%
4 AM
26°
9%
5 AM
24°
14%
6 AM
24°
12%
7 AM
25°
12%
8 AM
26°
22%
9 AM
29°
44%
10 AM
31°
45%
11 AM
32°
45%
12 PM
33°
40%
1 PM
34°
45%
2 PM
34°
51%
7-Day Forecast
Today
36° 24°
Partly Cloudy with a 33% chance of rain.
Tue
38° 24°
Mostly Clear with a 57% chance of rain.
Wed
39° 26°
Partly Cloudy with a 61% chance of rain.
Thu
36° 23°
Rain, 82% chance.
Fri
36° 22°
Drizzle, 60% chance.
Sat
34° 22°
Rain, 81% chance.
Sun
33° 21°
Drizzle, 60% chance.
TimeTempConditionsPrecipWindHumidity
Now 36° Partly Cloudy 17% 9 mph W 51%
4 PM 36° Partly Cloudy 28% 9 mph WSW 49%
5 PM 36° Partly Cloudy 33% 10 mph WSW 59%
6 PM 34° Partly Cloudy 33% 9 mph WSW 64%
7 PM 33° Partly Cloudy 18% 9 mph WSW 68%
8 PM 32° Partly Cloudy 18% 8 mph WSW 72%
9 PM 29° Partly Cloudy 18% 7 mph WSW 76%
10 PM 28° Partly Cloudy 18% 7 mph WSW 80%
11 PM 28° Partly Cloudy 19% 7 mph WSW 80%
12 AM 27° Partly Cloudy 14% 6 mph WSW 81%
1 AM 27° Partly Cloudy 8% 6 mph W 81%
2 AM 26° Partly Cloudy 8% 6 mph W 82%
3 AM 26° Partly Cloudy 9% 5 mph W 84%
4 AM 26° Partly Cloudy 9% 5 mph W 85%
5 AM 24° Partly Cloudy 14% 5 mph WSW 86%
6 AM 24° Partly Cloudy 12% 5 mph WSW 86%
7 AM 25° Partly Cloudy 12% 6 mph WSW 86%
8 AM 26° Partly Cloudy 22% 6 mph WSW 80%
9 AM 29° Rain 44% 7 mph W 74%
10 AM 31° Rain 45% 7 mph W 69%
11 AM 32° Mostly Clear 45% 7 mph W 65%
12 PM 33° Mostly Clear 40% 7 mph W 62%
1 PM 34° Clear 45% 7 mph WSW 58%
2 PM 34° Clear 51% 7 mph WSW 58%
15-Day Forecast
Today
8/17
Partly Cloudy
33%
24°
36°
Tue
8/18
Mostly Clear
57%
24°
38°
Wed
8/19
Partly Cloudy
61%
26°
39°
Thu
8/20
Rain
82%
23°
36°
Fri
8/21
Drizzle
60%
22°
36°
Sat
8/22
Rain
81%
22°
34°
Sun
8/23
Drizzle
60%
21°
33°
Mon
8/24
Drizzle
60%
21°
34°
Tue
8/25
Drizzle
60%
23°
34°
Wed
8/26
Drizzle
60%
23°
35°
Thu
8/27
Drizzle
60%
24°
34°
Fri
8/28
Drizzle
60%
24°
34°
Sat
8/29
Drizzle
60%
23°
33°
Sun
8/30
Drizzle
60%
23°
33°
Mon
8/31
Drizzle
60%
23°
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
31 AQI 35 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 56 Moderate 31 56
Wed 56 Moderate 31 56
Thu 55 Moderate 37 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 Mon Aug 17, 18:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE3295 J/kg
MLCAPE2566 J/kg
MUCAPE3295 J/kg
SBCIN0 J/kg
MLCIN-7 J/kg
Lifted Index-6.7
Kinematics
0–6 km Shear9 kt
0–1 km Shear4 kt
Eff. Shear15 kt
0–1 km SRH-3
0–3 km SRH-9
Eff. SRH-9
Storm Motion216° @ 15 kt
0–1 km EHI-0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.0
K-Index36.3
Thermo & Levels
PWAT2.27 in
0–3 km LR8.2 °C/km
700–500 LR5.5 °C/km
Total Totals47.7
LCL849 hPa
LFC1011 hPa
EL131 hPa
Freezing Lvl16,617 ft