RAF Northolt

EGWU / NHT

London, GB

Current TAF Forecast

Raw TAF:
TAF EGWU 171638Z 1718/1812 14005KT 9999 FEW018 BKN040 TEMPO 1718/1721 SCT014 BECMG 1721/1724 BKN010 PROB30 1721/1724 7000 BR BKN005 BECMG 1800/1803 6000 BR -DZ BKN005 TEMPO 1802/1809 3000 DZ BKN004 BECMG 1809/1812 FEW020

Detailed TAF Table

Parameter
Sat
19:00Z
+-1h
Sat
20:00Z
+0h
Sat
21:00Z
+1h
Sat
22:00Z
+2h
Sat
23:00Z
+3h
Sun
00:00Z
+4h
Sun
01:00Z
+5h
Sun
02:00Z
+6h
Sun
03:00Z
+7h
Sun
04:00Z
+8h
Sun
05:00Z
+9h
Sun
06:00Z
+10h
Sun
07:00Z
+11h
Sun
08:00Z
+12h
Sun
09:00Z
+13h
Sun
10:00Z
+14h
Wind Dir
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
140°
SE
Wind Speed
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
5kt
Visibility
10+ km
10+ km
7 km
7 km
7 km
6 km
6 km
3 km
3 km
3 km
3 km
3 km
3 km
3 km
6 km
6 km
Weather
☀️ Clear
☀️ Clear
Mist
BR
30%
Mist
BR
30%
Mist
BR
30%
Mist, Light Drizzle
BR -DZ
Mist, Light Drizzle
BR -DZ
Drizzle
DZ
Drizzle
DZ
Drizzle
DZ
Drizzle
DZ
Drizzle
DZ
Drizzle
DZ
Drizzle
DZ
☀️ Clear
☀️ Clear
Clouds
FEW018
BKN040
FEW018
BKN040
BKN005
BKN005
BKN005
BKN005
BKN005
BKN004
BKN004
BKN004
BKN004
BKN004
BKN004
BKN004
FEW020
FEW020
Ceiling
4000ft
AGL
4000ft
AGL
500ft
AGL
500ft
AGL
500ft
AGL
500ft
AGL
500ft
AGL
400ft
AGL
400ft
AGL
400ft
AGL
400ft
AGL
400ft
AGL
400ft
AGL
400ft
AGL
🌤️ Unlimited
🌤️ Unlimited
Flight Rules VFR VFR IFR IFR IFR IFR IFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR VFR VFR
Day/Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 07:23
🌙
Night
🌅 07:23
🌅
Dawn
🌅 07:23
☀️
Day
🌅 07:23
☀️
Day
🌅 07:23
☀️
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
VFR
Wind
140° at 5 kt
Visibility
10+ km
Clouds
FEW018 BKN040
📖 Plain English Explanation:

This is the base forecast condition. Winds from the Southeast (140°) at 5kt. Visibility will be excellent at 10+ km. Few clouds at 1800 feet, Broken clouds at 4000 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

TEMPO 2026-02-17 18:00:00 - 2026-01-17 21:00:00
VFR
Clouds
SCT014
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Scattered clouds at 1400 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

BECMG 2026-01-17 21:00:00 - 2026-01-18 00:00:00
MVFR
Clouds
BKN010
📖 Plain English Explanation:

Conditions will gradually change to become: Broken clouds at 1000 feet. Marginal VFR conditions - some restrictions for visual flying.

PROB30 2026-01-17 21:00:00 - 2026-01-18 00:00:00
IFR
Visibility
7 km
Weather
Mist
Clouds
BKN005
📖 Plain English Explanation:

There is a 30% probability of: Visibility will be good at 7 km. Weather conditions: Mist. Broken clouds at 500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

BECMG 2026-01-18 00:00:00 - 2026-01-18 03:00:00
IFR
Visibility
6 km
Weather
Mist, Light Drizzle
Clouds
BKN005
📖 Plain English Explanation:

Conditions will gradually change to become: Visibility will be good at 6 km. Weather conditions: Mist, Light Drizzle. Broken clouds at 500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

TEMPO 2026-01-18 02:00:00 - 2026-01-18 09:00:00
LIFR
Visibility
3 km
Weather
Drizzle
Clouds
BKN004
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be moderate at 3 km. Weather conditions: Drizzle. Broken clouds at 400 feet. Low IFR conditions - challenging even for instrument operations.

BECMG 2026-01-18 09:00:00 - 2026-01-18 12:00:00
VFR
Clouds
FEW020
📖 Plain English Explanation:

Conditions will gradually change to become: Few clouds at 2000 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.