Ontario International Airport

KONT / ONT

Ontario, US

Current TAF Forecast

Raw TAF:
TAF KONT 221120Z 2212/2318 VRB04KT P6SM SCT012 SCT040 FM222100 25010G18KT P6SM SCT250 FM230400 26008KT P6SM SCT200 FM230800 VRB04KT P6SM BKN200

Detailed TAF Table

Parameter
Wed
12:00Z
+-1h
Wed
13:00Z
+0h
Wed
14:00Z
+1h
Wed
15:00Z
+2h
Wed
16:00Z
+3h
Wed
17:00Z
+4h
Wed
18:00Z
+5h
Wed
19:00Z
+6h
Wed
20:00Z
+7h
Wed
21:00Z
+8h
Wed
22:00Z
+9h
Wed
23:00Z
+10h
Thu
00:00Z
+11h
Thu
01:00Z
+12h
Thu
02:00Z
+13h
Thu
03:00Z
+14h
Thu
04:00Z
+15h
Thu
05:00Z
+16h
Thu
06:00Z
+17h
Thu
07:00Z
+18h
Thu
08:00Z
+19h
Thu
09:00Z
+20h
Thu
10:00Z
+21h
Thu
11:00Z
+22h
Thu
12:00Z
+23h
Thu
13:00Z
+24h
Thu
14:00Z
+25h
Thu
15:00Z
+26h
Thu
16:00Z
+27h
Wind Dir
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
250°
W
250°
W
250°
W
250°
W
250°
W
250°
W
VRB
260°
W
260°
W
260°
W
260°
W
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
Wind Speed
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
10 kt
G18 kt
10 kt
G18 kt
10 kt
G18 kt
10 kt
G18 kt
10 kt
G18 kt
10 kt
G18 kt
4 kt
8 kt
8 kt
8 kt
8 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
4 kt
Visibility
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
SCT250
SCT250
SCT250
SCT250
SCT250
SCT250
SCT012
SCT040
SCT200
SCT200
SCT200
SCT200
BKN200
BKN200
BKN200
BKN200
BKN200
BKN200
SCT012
SCT040
SCT012
SCT040
SCT012
SCT040
Ceiling
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
20,000 ft
AGL
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
Flight Rules VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR VFR
Day/Night
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:33Z
☀️
Day
🌇 18:33Z
☀️
Day
🌇 18:33Z
🌇
Dusk
🌇 18:33Z
🌙
Night
🌇 18:33Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 05:25Z
🌙
Night
🌅 05:25Z
🌅
Dawn
🌅 05:25Z
☀️
Day
🌅 05:25Z
☀️
Day
🌅 05:25Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:34Z
Flight Rules
VFR: Visual Flight Rules
MVFR: Marginal VFR
IFR: Instrument Flight Rules
LIFR: Low IFR
Ceiling Colors
Red: < 500ft
Amber: 500-1000ft
Blue: 1000-3000ft
Green: > 3000ft
⛈️ TCU: Towering Cumulus
🌩️ CB: Cumulonimbus
+Nh: Hours from now%: Probability of occurrenceAGL: Above Ground Level

Forecast Periods

BASE
VFR
Wind
VRB° at 4 kt
Visibility
>6SM
Clouds
SCT012 SCT040
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 4 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 1200 feet, Scattered clouds at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM222100 21:00Z - 03:00Z
VFR
Wind
250° at 10 kt
Gusts: 18 kt
Visibility
>6SM
Clouds
SCT250
📖 Plain English Explanation:

Winds from the West-Southwest (250°) at 10 kt. Gusts up to 18 kt are expected. Visibility will be excellent at more than 6SM. Scattered clouds at 25000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM230400 04:00Z - 10:00Z
VFR
Wind
260° at 8 kt
Visibility
>6SM
Clouds
SCT200
📖 Plain English Explanation:

Winds from the West (260°) at 8 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 20000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM230800 08:00Z - 14:00Z
VFR
Wind
VRB° at 4 kt
Visibility
>6SM
Clouds
BKN200
📖 Plain English Explanation:

Winds will be variable in direction at 4 kt. Visibility will be excellent at more than 6SM. Broken clouds at 20000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

📚 Understanding TAF Forecasts

Terminal Aerodrome Forecast (TAF) provides detailed weather forecasts specifically for aviation operations. Our system translates complex meteorological codes into plain English to help pilots of all experience levels understand forecasted conditions.

What TAF Includes:

  • • Wind direction, speed, and gusts
  • • Visibility in statute miles or kilometers
  • • Weather phenomena (rain, snow, fog, thunderstorms)
  • • Cloud coverage types and altitudes
  • • Forecast changes with timing
  • • Flight rules categories (VFR/IFR)

Change Indicators Explained:

  • BASE - Main forecast conditions
  • FM - Permanent change from specific time
  • BECMG - Gradual change over 2-4 hours
  • TEMPO - Temporary changes (less than 1 hour)
  • PROB30/40 - 30% or 40% probability

🛩️ Flight Rules Categories

VFR

Visual Flight Rules

  • • Ceiling ≥ 3000 ft
  • • Visibility ≥ 5 miles
  • • Good for visual flying

MVFR

Marginal VFR

  • • Ceiling 1000-3000 ft
  • • Visibility 3-5 miles
  • • Caution for VFR

IFR

Instrument Flight Rules

  • • Ceiling 500-1000 ft
  • • Visibility 1-3 miles
  • • Instruments required

LIFR

Low IFR

  • • Ceiling < 500 ft
  • • Visibility < 1 mile
  • • Challenging conditions

💡 TAF Reading Tips

For Student Pilots:

  • • Focus on the plain English explanations above
  • • Pay attention to flight rules categories
  • • Look for wind direction relative to runway headings
  • • Check for temporary conditions (TEMPO)

For Experienced Pilots:

  • • Cross-reference with raw TAF for precise timing
  • • Consider probability forecasts for alternate planning
  • • Monitor BECMG periods for gradual changes
  • • Always check current METAR vs TAF forecast

Important: TAF forecasts should always be supplemented with current METAR observations, PIREPs, and other weather information for complete situational awareness. Weather can change rapidly, and forecasts have inherent limitations.