Heat Advisory — San Juan and Vicinity, PR, Northeast, PR, Southeast, PR, Eastern Interior, PR, North Central, PR, Ponce and Vicinity, PR, Northwest, PR, Mayaguez and Vicinity, PR, Southwest, PR, Culebra, PR, Vieques, PR, St.Thomas...St. John.. and Adjacent Islands, VI, St Croix, VI 4:00 PM Red Flag Warning — WYZ417, WYZ418, WYZ419, WYZ423, WYZ424, WYZ428, WYZ429, WYZ430, WYZ431, WYZ432, WYZ433 10:00 PM

Cheyenne, Wyoming

Last updated: 3:25 AM CDT  ·  Refresh
19°C
Feels like 17°
Clear
▲ 35°  /  ▼ 18°
Wind
7 mph SSW
Humidity
51%
Dew Point
11°
Pressure
24.11 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
9%
Sunrise
6:00 AM
Sunset
8:07 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Cheyenne is currently clear at 19°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 1310 J/kg) — isolated convective development possible. Sunrise: 6:00AM · Sunset: 8:07PM.

Alerts

Heat Advisory
San Juan and Vicinity, PR, Northeast, PR, Southeast, PR, Eastern Interior, PR, North Central, PR, Ponce and Vicinity, PR, Northwest, PR, Mayaguez and Vicinity, PR, Southwest, PR, Culebra, PR, Vieques, PR, St.Thomas...St. John.. and Adjacent Islands, VI, St Croix, VI
Expires 4:00 PM
Red Flag Warning
WYZ417, WYZ418, WYZ419, WYZ423, WYZ424, WYZ428, WYZ429, WYZ430, WYZ431, WYZ432, WYZ433
Expires 10:00 PM
84 AQI · Moderate Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
19°
3%
3 AM
18°
3%
4 AM
18°
3%
5 AM
15°
3%
6 AM
16°
3%
7 AM
19°
3%
8 AM
24°
3%
9 AM
27°
3%
10 AM
29°
3%
11 AM
31°
3%
12 PM
31°
3%
1 PM
33°
3%
2 PM
33°
3%
3 PM
33°
3%
4 PM
33°
3%
5 PM
35°
3%
6 PM
34°
3%
7 PM
32°
3%
8 PM
29°
3%
9 PM
25°
3%
10 PM
24°
3%
11 PM
23°
3%
12 AM
23°
3%
1 AM
22°
3%
7-Day Forecast
Today
35° 18°
Clear.
Sun
35° 18°
Mostly Clear with a 41% chance of rain.
Mon
34° 16°
Partly Cloudy with a 26% chance of rain.
Tue
32° 16°
Clear with a 36% chance of rain.
Wed
32° 14°
Rain, 64% chance.
Thu
23° 10°
Heavy Rain, 82% chance.
Fri
26° 10°
Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 19° Clear 3% 7 mph SSW 51%
3 AM 18° Clear 3% 6 mph WSW 47%
4 AM 18° Clear 3% 6 mph W 44%
5 AM 15° Clear 3% 7 mph WNW 38%
6 AM 16° Clear 3% 9 mph WNW 29%
7 AM 19° Clear 3% 9 mph WNW 21%
8 AM 24° Clear 3% 10 mph WNW 15%
9 AM 27° Clear 3% 11 mph NW 12%
10 AM 29° Clear 3% 12 mph NW 11%
11 AM 31° Clear 3% 14 mph NW 10%
12 PM 31° Clear 3% 15 mph NW 9%
1 PM 33° Clear 3% 15 mph NW 9%
2 PM 33° Mostly Clear 3% 16 mph NW 9%
3 PM 33° Mostly Clear 3% 18 mph NW 9%
4 PM 33° Mostly Clear 3% 18 mph NW 9%
5 PM 35° Clear 3% 17 mph NW 9%
6 PM 34° Clear 3% 16 mph NW 10%
7 PM 32° Mostly Clear 3% 13 mph NW 11%
8 PM 29° Mostly Clear 3% 12 mph NW 12%
9 PM 25° Mostly Clear 3% 11 mph NW 14%
10 PM 24° Partly Cloudy 3% 11 mph NW 15%
11 PM 23° Partly Cloudy 3% 11 mph NW 17%
12 AM 23° Partly Cloudy 3% 10 mph NW 18%
1 AM 22° Partly Cloudy 3% 10 mph NW 20%
15-Day Forecast
Today
8/8
Clear
3%
18°
35°
Sun
8/9
Mostly Clear
41%
18°
35°
Mon
8/10
Partly Cloudy
26%
16°
34°
Tue
8/11
Clear
36%
16°
32°
Wed
8/12
Rain
64%
14°
32°
Thu
8/13
Heavy Rain
82%
10°
23°
Fri
8/14
Rain
82%
10°
26°
Sat
8/15
Rain
69%
8°
23°
Sun
8/16
Drizzle
44%
10°
29°
Mon
8/17
Rain
64%
14°
29°
Tue
8/18
Drizzle
60%
17°
29°
Wed
8/19
Drizzle
60%
17°
29°
Thu
8/20
Drizzle
60%
17°
30°
Fri
8/21
Drizzle
60%
17°
31°
Sat
8/22
Drizzle
60%
17°
31°
84
Moderate
U.S. Air Quality Index · Dominant: O3
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
60 AQI 14.0 µg/m³
O3
Ground-level ozone
Dominant
84 AQI 65 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 84 Moderate 84 60
Sun 80 Moderate 80 61
Mon 74 Moderate 74 64
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 Aug 8, 07:00'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
SBCAPE404 J/kg
MLCAPE536 J/kg
MUCAPE1848 J/kg
SBCIN-875 J/kg
MLCIN0 J/kg
Lifted Index-0.2
Kinematics
0–6 km Shear27 kt
0–1 km Shear10 kt
Eff. Shear—
0–1 km SRH88
0–3 km SRH12
Eff. SRH—
Storm Motion251° @ 25 kt
0–1 km EHI0.2
Composite Parameters
Sig. Tornado0.1
STP (eff)—
Supercell—
K-Index—
Thermo & Levels
PWAT0.59 in
0–3 km LR5.2 °C/km
700–500 LR9.3 °C/km
Total Totals—
LCL722 hPa
LFC503 hPa
EL273 hPa
Freezing Lvl11,063 ft