Bert Mooney Airport

KBTM / BTM

Butte, US

Current TAF Forecast

Raw TAF:
TAF KBTM 230634Z 2307/2406 33005KT P6SM OVC040 FM230730 31007KT 1SM -SN BR OVC010 FM231000 30008KT P6SM VCSH SCT015 OVC025 FM231900 30019G30KT 3SM -SHSN OVC020 FM240000 33012KT P6SM BKN050

Detailed TAF Table

Parameter
Thu
07:00Z
+-1h
Thu
08:00Z
+0h
Thu
09:00Z
+1h
Thu
10:00Z
+2h
Thu
11:00Z
+3h
Thu
12:00Z
+4h
Thu
13:00Z
+5h
Thu
14:00Z
+6h
Thu
15:00Z
+7h
Thu
16:00Z
+8h
Thu
17:00Z
+9h
Thu
18:00Z
+10h
Thu
19:00Z
+11h
Thu
20:00Z
+12h
Thu
21:00Z
+13h
Thu
22:00Z
+14h
Thu
23:00Z
+15h
Fri
00:00Z
+16h
Fri
01:00Z
+17h
Fri
02:00Z
+18h
Fri
03:00Z
+19h
Fri
04:00Z
+20h
Wind Dir
330°
NW
330°
NW
330°
NW
300°
NW
300°
NW
300°
NW
300°
NW
300°
NW
300°
NW
330°
NW
330°
NW
330°
NW
300°
NW
300°
NW
300°
NW
300°
NW
300°
NW
330°
NW
330°
NW
330°
NW
330°
NW
330°
NW
Wind Speed
5 kt
5 kt
5 kt
8 kt
8 kt
8 kt
8 kt
8 kt
8 kt
5 kt
5 kt
5 kt
19 kt
G30 kt
19 kt
G30 kt
19 kt
G30 kt
19 kt
G30 kt
19 kt
G30 kt
12 kt
G30 kt
12 kt
12 kt
12 kt
12 kt
Visibility
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
3SM
3SM
3SM
3SM
3SM
>6SM
>6SM
>6SM
>6SM
>6SM
Weather
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
Light Showers Snow
-SHSN
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Clouds
OVC040
OVC040
OVC040
SCT015
OVC025
SCT015
OVC025
SCT015
OVC025
SCT015
OVC025
SCT015
OVC025
SCT015
OVC025
OVC040
OVC040
OVC040
OVC020
OVC020
OVC020
OVC020
OVC020
BKN050
BKN050
BKN050
BKN050
BKN050
Ceiling
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
4,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
Flight Rules VFR VFR VFR MVFR MVFR MVFR MVFR MVFR MVFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR
Day/Night
☀️
Day
🌅 05:16Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 18:43Z
☀️
Day
🌇 18:43Z
☀️
Day
🌇 18:43Z
🌇
Dusk
🌇 18:43Z
🌙
Night
🌇 18:43Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 05:14Z
🌙
Night
🌅 05:14Z
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
330° at 5 kt
Visibility
>6SM
Clouds
OVC040
📖 Plain English Explanation:

This is the base forecast condition. Winds from the North-Northwest (330°) at 5 kt. Visibility will be excellent at more than 6SM. Overcast skies at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM230730 07:00Z - 13:00Z
IFR
Wind
310° at 7 kt
Visibility
1SM
Weather
Light Snow, Mist
Clouds
OVC010
📖 Plain English Explanation:

Winds from the Northwest (310°) at 7 kt. Visibility will be moderate at 1SM. Weather conditions: Light Snow, Mist. Overcast skies at 1000 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM231000 10:00Z - 16:00Z
MVFR
Wind
300° at 8 kt
Visibility
>6SM
Clouds
SCT015 OVC025
📖 Plain English Explanation:

Winds from the West-Northwest (300°) at 8 kt. Visibility will be excellent at more than 6SM. Scattered clouds at 1500 feet, Overcast skies at 2500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM231900 19:00Z - 01:00Z
MVFR
Wind
300° at 19 kt
Gusts: 30 kt
Visibility
3SM
Weather
Light Showers Snow
Clouds
OVC020
📖 Plain English Explanation:

Winds from the West-Northwest (300°) at 19 kt. Gusts up to 30 kt are expected. Visibility will be good at 3SM. Weather conditions: Light Showers Snow. Overcast skies at 2000 feet. Marginal VFR conditions - some restrictions for visual flying.

FM240000 00:00Z - 06:00Z
VFR
Wind
330° at 12 kt
Visibility
>6SM
Clouds
BKN050
📖 Plain English Explanation:

Winds from the North-Northwest (330°) at 12 kt. Visibility will be excellent at more than 6SM. Broken clouds at 5000 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.