Naval Station Mayport / Admiral David L McDonald Field

KNRB / NRB

Jacksonville, US

Current TAF Forecast

Raw TAF:
TAF KNRB 0423/0523 VRB05KT 9999 SCT025 QNH3020INS FM050400 VRB04KT 4000 BR SCT003 BKN025 QNH3019INS FM050700 00000KT 2400 BR BKN003 OVC010 QNH3016INS TEMPO 0508/0514 0800 FG OVC003 FM051500 VRB06KT 9000 BR FEW003 BKN020 BKN250 QNH3014INS AUTOMATED SENSOR METWATCH 0504 TIL 0511 TX20/0519Z TN16/0512Z FN20073

Detailed TAF Table

Parameter
Thu
01:00Z
+-1h
Thu
02:00Z
+0h
Thu
03:00Z
+1h
Thu
04:00Z
+2h
Thu
05:00Z
+3h
Thu
06:00Z
+4h
Thu
07:00Z
+5h
Thu
08:00Z
+6h
Thu
09:00Z
+7h
Thu
10:00Z
+8h
Thu
11:00Z
+9h
Thu
12:00Z
+10h
Thu
13:00Z
+11h
Thu
14:00Z
+12h
Thu
15:00Z
+13h
Thu
16:00Z
+14h
Thu
17:00Z
+15h
Thu
18:00Z
+16h
Thu
19:00Z
+17h
Wind Dir
VRB
VRB
VRB
VRB
VRB
VRB
--
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
VRB
Wind Speed
5 kt
5 kt
5 kt
4 kt
4 kt
4 kt
--
5 kt
5 kt
5 kt
5 kt
5 kt
5 kt
5 kt
6 kt
6 kt
6 kt
6 kt
6 kt
Visibility
10+ km
10+ km
10+ km
4 km
4 km
4 km
2.4 km
0.8 km
0.8 km
0.8 km
0.8 km
0.8 km
0.8 km
10+ km
0.511 km
0.511 km
0.511 km
0.511 km
0.511 km
Weather
☀️ Clear
☀️ Clear
☀️ Clear
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Fog
FG
Fog
FG
Fog
FG
Fog
FG
Fog
FG
Fog
FG
☀️ Clear
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Mist
BR
Clouds
SCT025
SCT025
SCT025
SCT003
BKN025
SCT003
BKN025
SCT003
BKN025
BKN003
OVC010
OVC003
OVC003
OVC003
OVC003
OVC003
OVC003
SCT025
FEW003
BKN020
FEW003
BKN020
FEW003
BKN020
FEW003
BKN020
FEW003
BKN020
Ceiling
🌤️ Unlimited
🌤️ Unlimited
🌤️ Unlimited
2,500 ft
AGL
2,500 ft
AGL
2,500 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
300 ft
AGL
🌤️ Unlimited
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
2,000 ft
AGL
Flight Rules VFR VFR VFR IFR IFR IFR LIFR LIFR LIFR LIFR LIFR LIFR LIFR VFR LIFR LIFR LIFR LIFR LIFR
Day/Night
🌙
Night
🌙
Night
🌙
Night
🌙
Night
🌅 06:18Z
🌙
Night
🌅 06:18Z
🌅
Dawn
🌅 06:18Z
☀️
Day
🌅 06:18Z
☀️
Day
🌅 06:18Z
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
☀️
Day
🌇 17:41Z
☀️
Day
🌇 17:41Z
☀️
Day
🌇 17:41Z
🌇
Dusk
🌇 17:41Z
🌙
Night
🌇 17:41Z
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 5 kt
Visibility
10+ km
Clouds
SCT025
📖 Plain English Explanation:

This is the base forecast condition. Winds will be variable in direction at 5 kt. Visibility will be excellent at 10+ km. Scattered clouds at 2500 feet. Conditions will be suitable for Visual Flight Rules (VFR) operations.

FM050400 04:00Z - 10:00Z
IFR
Wind
VRB° at 4 kt
Visibility
4 km
Weather
Mist
Clouds
SCT003 BKN025
📖 Plain English Explanation:

Winds will be variable in direction at 4 kt. Visibility will be moderate at 4 km. Weather conditions: Mist. Scattered clouds at 300 feet, Broken clouds at 2500 feet. Instrument Flight Rules (IFR) conditions - instrument flying required.

FM050700 07:00Z - 13:00Z
LIFR
Wind
0° at 0 kt
Visibility
2.4 km
Weather
Mist
Clouds
BKN003 OVC010
📖 Plain English Explanation:

Winds from the North (0°) at 0 kt. Visibility will be moderate at 2.4 km. Weather conditions: Mist. Broken clouds at 300 feet, Overcast skies at 1000 feet. Low IFR conditions - challenging even for instrument operations.

TEMPO 08:00Z - 14:00Z
LIFR
Visibility
0.8 km
Weather
Fog
Clouds
OVC003
📖 Plain English Explanation:

Temporary conditions (lasting less than an hour at a time) may include: Visibility will be poor at 0.8 km. Weather conditions: Fog. Overcast skies at 300 feet. Low IFR conditions - challenging even for instrument operations.

FM051500 15:00Z - 21:00Z
LIFR
Wind
VRB° at 6 kt
Visibility
0.511 km
Weather
Mist
Clouds
FEW003 BKN020 BKN250
📖 Plain English Explanation:

Winds will be variable in direction at 6 kt. Visibility will be poor at 0.511 km. Weather conditions: Mist. Few clouds at 300 feet, Broken clouds at 2000 feet, Broken clouds at 25000 feet. Low IFR conditions - challenging even for instrument 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.