Naval Station Mayport / Admiral David L McDonald Field

KNRB / NRB

Jacksonville, US

Last Updated
Mar 4, 17:52Z

Current Weather

Display Units
Aging 1 hour ago
17:52Z

🌙 Night
VFR
Flight Rules
22°C
Temperature
Dewpoint: 17°C
10 kt
40°
10 SM
Visibility
5,000 ft
Ceiling
Above Ground Level
1026 hPa
QNH
Altimeter Setting

Raw METAR

METAR KNRB 041752Z 04010KT 10SM SCT011 BKN050 BKN250 22/17 A3029 RMK AO2 SLP255 T02170172 10217 20150 58009 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 15 ft
SCT 1,100 ft AGL
BKN 5,000 ft AGL
BKN 25,000 ft AGL
SCT
Scattered (3/8-4/8 sky coverage)
1,100 ft
AGL (Above Ground)
1,115 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
5,000 ft
AGL (Above Ground)
5,015 ft AMSL
☁️
BKN
Broken (5/8-7/8 sky coverage)
25,000 ft
AGL (Above Ground)
25,015 ft AMSL
QNH
1026 hPa
Sea Level Pressure
For altitude above MSL
QFE
1026 hPa
Field Pressure
Height above aerodrome (15 ft)
Pressure Alt
-368 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 476 ft
ISA Deviation: +7.0°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF AMD KNRB 0416/0515 02010KT 9999 FEW020 SCT250 QNH3018INS FM050000 06008KT 4000 BR SCT003 OVC008 QNH3022INS FM050400 04003KT 2400 BR BKN003 OVC008 QNH3025 TEMPO 0508/0514 0800 FG OVC003 TX25/0419Z TN16/0514Z AMD 1620 FN20022
Upcoming Changes (Next 12 Hours)
18:53Z BASE
+0h
VFR 20° 10 kt
Visibility: 10+ km
00:00Z FM050000
+6h
IFR 60° 8 kt
Visibility: 4 km
Ceiling: 800 ft
Mist
04:00Z FM050400
+10h
LIFR 40° 3 kt
Visibility: 2.4 km
Ceiling: 300 ft
Mist

24-Hour Weather Evolution

Loading weather data...
Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
Chart Features
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
NRB
05 ✈️
23

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 05/23
Active: 05
8,001 ft 200 ft ASP 43°
9.8 kt 1.7 kt
10° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KNRB

6,634 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
78.3%
MVFR
12.2%
IFR
4.9%
LIFR
4.6%

Naval Station Mayport / Admiral David L McDonald Field typically experiences VFR conditions 78.3% of the time, though instrument-rated pilots will find IFR weather present approximately 9.5% of observations. Prevailing winds are from the NE averaging 8.5 knots. Temperature extremes range from -4°C to 32°C, reflecting significant seasonal variation. The best months for VFR flying are November, September, October.

Wind Analysis

Prevailing Direction: NE (45°)
Average Speed: 8.5 kt
Maximum Recorded: 29 kt
Calm Winds: 6.6%
Direction Distribution:
N
16.5%
NE
19.5%
E
7.3%
SE
3.1%
S
5.1%
SW
11.5%
W
16.2%
NW
14.2%

Temperature Range

Average: 16.8°C
Range: -4°C to 32°C
-4°C 32°C

Visibility

Average: 9.3 SM
Below 3 SM: 2.1%
Fog Frequency: 3.5%

Best Months for VFR

November September October

Runway Wind Analysis

Runway 05/23
Favorable wind: 100%
Avg crosswind: 4.6 kt

Statistics computed from 6,634 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

Naval Station Mayport / Admiral David L McDonald Field - Airport Information

Airport Details

ICAO Code: KNRB
IATA Code: NRB
Type: medium airport
Status: active
Elevation: 15 ft MSL

Location

City: Jacksonville
Country: US
Latitude: 30.391100°
Longitude: -81.424698°
Time Zone: Etc/GMT+5

Runway Information

Runway 05/23
Length: 8,001 ft
Width: 200 ft
Surface: ASP
ILS: No

About Naval Station Mayport / Admiral David L McDonald Field

Overview

Naval Station Mayport / Admiral David L McDonald Field serves as a critical naval aviation facility located in Jacksonville, Florida. Situated at an elevation of 15 feet MSL, this medium airport supports military aviation operations with a single 8,001-foot asphalt runway oriented 05/23.

Flying Conditions

The airport experiences predominantly VFR conditions, with 79.9% of observations showing clear weather and only 4.3% IFR conditions. Winds are typically from the northeast at 45 degrees, averaging 8.4 knots, with occasional gusts up to 29 knots. September, October, and November offer the most consistent VFR flying conditions, with moderate temperatures ranging from 1°C to 32°C.

Notable Features

The coastal location near Jacksonville influences the airport's meteorological characteristics, with occasional reduced visibility and fog affecting 2.9% of observations. The runway has excellent wind alignment, with 100% favorable wind conditions and an average crosswind component of only 4.5 knots, facilitating comfortable landings and takeoffs.

Approach Considerations

Pilots can expect generally stable approach conditions on runway 05/23, with good wind alignment and minimal crosswind challenges. Visibility averages 9.4 statute miles, with only 1.7% of observations showing visibility below 3 miles. Standard preparations for coastal maritime weather patterns are recommended.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.