John Murtha Johnstown Cambria County Airport

KJST / JST

Johnstown, US

Current TAF Forecast

Raw TAF:
TAF KJST 101555Z 1016/1112 25009KT P6SM -SHRA BKN015 OVC100 TEMPO 1016/1018 BKN009 FM101800 26009KT P6SM OVC025 FM102100 26009KT P6SM BKN050 FM110400 24007KT P6SM -SHRA BKN025 OVC040 FM110700 25008G16KT 4SM -SHRA BR SCT007 OVC015

Detailed TAF Table

Parameter
Wed
16:00Z
+-1h
Wed
17:00Z
+0h
Wed
18:00Z
+1h
Wed
19:00Z
+2h
Wed
20:00Z
+3h
Wed
21:00Z
+4h
Wed
22:00Z
+5h
Wed
23:00Z
+6h
Thu
00:00Z
+7h
Thu
01:00Z
+8h
Thu
02:00Z
+9h
Thu
03:00Z
+10h
Thu
04:00Z
+11h
Thu
05:00Z
+12h
Thu
06:00Z
+13h
Thu
07:00Z
+14h
Thu
08:00Z
+15h
Thu
09:00Z
+16h
Thu
10:00Z
+17h
Wind Dir
250°
W
250°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
260°
W
250°
W
240°
SW
240°
SW
240°
SW
250°
W
250°
W
250°
W
250°
W
Wind Speed
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
9 kt
7 kt
7 kt
7 kt
8 kt
G16 kt
8 kt
G16 kt
8 kt
G16 kt
8 kt
G16 kt
Visibility
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
>6SM
4SM
4SM
4SM
4SM
Weather
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
☀️ Clear
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain
-SHRA
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Light Showers Rain, Mist
-SHRA BR
Clouds
BKN015
OVC100
BKN015
OVC100
OVC025
OVC025
OVC025
BKN050
BKN050
BKN050
BKN050
BKN050
BKN050
BKN015
OVC100
BKN025
OVC040
BKN025
OVC040
BKN025
OVC040
SCT007
OVC015
SCT007
OVC015
SCT007
OVC015
SCT007
OVC015
Ceiling
1,500 ft
AGL
1,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
5,000 ft
AGL
1,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
1,500 ft
AGL
Flight Rules MVFR MVFR MVFR MVFR MVFR VFR VFR VFR VFR VFR VFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR MVFR
Day/Night
☀️
Day
☀️
Day
🌇 19:15Z
☀️
Day
🌇 19:15Z
☀️
Day
🌇 19:15Z
🌙
Night
🌇 19:15Z
🌙
Night
🌇 19:15Z
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 04:43Z
🌙
Night
🌅 04:43Z
🌙
Night
🌅 04:43Z
☀️
Day
🌅 04:43Z
☀️
Day
🌅 04:43Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
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
MVFR
Wind
250° at 9 kt
Visibility
>6SM
Weather
Light Showers Rain
Clouds
BKN015 OVC100
📖 Plain English Explanation:

This is the base forecast condition. Winds from the West-Southwest (250°) at 9 kt. Visibility will be excellent at more than 6SM. Weather conditions: Light Showers Rain. Broken clouds at 1500 feet, Overcast skies at 10000 feet. Marginal VFR conditions - some restrictions for visual flying.

TEMPO 16:00Z - 18:00Z
IFR
Clouds
BKN009
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Broken clouds at 900 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM101800 18:00Z - 00:00Z
MVFR
Wind
260° at 9 kt
Visibility
>6SM
Clouds
OVC025
📖 Plain English Explanation:

Winds from the West (260°) at 9 kt. Visibility will be excellent at more than 6SM. Overcast skies at 2500 feet. Marginal VFR conditions - some restrictions for visual flying.

FM102100 21:00Z - 03:00Z
VFR
Wind
260° at 9 kt
Visibility
>6SM
Clouds
BKN050
📖 Plain English Explanation:

Winds from the West (260°) at 9 kt. Visibility will be excellent at more than 6SM. Broken clouds at 5000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM110400 04:00Z - 10:00Z
MVFR
Wind
240° at 7 kt
Visibility
>6SM
Weather
Light Showers Rain
Clouds
BKN025 OVC040
📖 Plain English Explanation:

Winds from the West-Southwest (240°) at 7 kt. Visibility will be excellent at more than 6SM. Weather conditions: Light Showers Rain. Broken clouds at 2500 feet, Overcast skies at 4000 feet. Marginal VFR conditions - some restrictions for visual flying.

FM110700 07:00Z - 13:00Z
MVFR
Wind
250° at 8 kt
Gusts: 16 kt
Visibility
4SM
Weather
Light Showers Rain, Mist
Clouds
SCT007 OVC015
📖 Plain English Explanation:

Winds from the West-Southwest (250°) at 8 kt. Gusts up to 16 kt are expected. Visibility will be good at 4SM. Weather conditions: Light Showers Rain, Mist. Scattered clouds at 700 feet, Overcast skies at 1500 feet. Marginal VFR conditions - some restrictions for visual flying.

📚 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.