Naval Station Mayport / Admiral David L McDonald Field

KNRB / NRB

Jacksonville, US

Last Updated
May 14, 23:52Z

Current Weather

Display Units
Fresh 6 min ago
23:52Z

🌙 Night
VFR
Flight Rules
28°C
Temperature
Dewpoint: 12°C
7 kt
330°
10 SM
Visibility
Ceiling
Unlimited
1011 hPa
QNH
Altimeter Setting

Raw METAR

METAR KNRB 142352Z 33007KT 10SM FEW070 28/12 A2986 RMK AO2 SLP110 T02830122 10311 20283 53015 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 15 ft
FEW 7,000 ft AGL
🌤️
FEW
Few (1/8-2/8 sky coverage)
7,000 ft
AGL (Above Ground)
7,015 ft AMSL

Weather Briefing

VFR

Naval Station Mayport / Admiral David L McDonald Field is currently reporting visual flight rules (VFR) conditions with few clouds at 7,000 feet and 10 SM visibility.

Wind Analysis

Winds are from the north-northwest (330°) at 7 knots. Runway 05/23 is favored with a 1-knot headwind and 7-knot crosswind component.

Visibility & Ceiling

Visibility is 10 SM. No ceiling exists. Cloud layers reported: few at 7,000 ft.

Temperature & Moisture

Temperature is 28°C (82°F) with a dewpoint of 12°C, indicating very dry conditions.

Forecast Outlook

The TAF forecast covers the next 24 hours. The forecast shows a transition between VFR and IFR conditions. Pilots should monitor the forecast closely and have an alternate airport plan.

Pilot Recommendations

Conditions are favorable for visual flight. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
1011 hPa
Sea Level Pressure
For altitude above MSL
QFE
1011 hPa
Field Pressure
Height above aerodrome (15 ft)
Pressure Alt
83 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 1,647 ft
ISA Deviation: +13.0°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KNRB 142300Z 1423/1523 30010G15KT 9999 FEW070 QNH2981INS FM150400 VRB06KT 9999 SKC QNH2991INS FM151200 02010G15KT 9999 SKC QNH3000INS AUTOMATED SENSOR METWATCH 1505 TIL 1509 TX30/1519Z TN20/1511Z FN20073
Upcoming Changes (Next 12 Hours)
23:58Z BASE
+0h
VFR 300° 10 kt
Visibility: 10+ km
04:00Z FM150400
+5h
VFR VRB 6 kt
Visibility: 10+ km

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°
1.2 kt 6.9 kt
80° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KNRB

9,277 observations | Sep 2025 - May 2026

Flight Rules Distribution

VFR
79.1%
MVFR
12.7%
IFR
4.4%
LIFR
3.8%

Naval Station Mayport / Admiral David L McDonald Field typically experiences VFR conditions 79.1% of the time, though instrument-rated pilots will find IFR weather present approximately 8.2% of observations. Prevailing winds are from the NE averaging 8.9 knots, with gusts recorded up to 31 knots. Temperature extremes range from -4°C to 32°C, reflecting significant seasonal variation. The best months for VFR flying are November, September, April.

Wind Analysis

Prevailing Direction: NE (45°)
Average Speed: 8.9 kt
Maximum Recorded: 31 kt
Calm Winds: 6.8%
Direction Distribution:
N
14.1%
NE
20.4%
E
8.8%
SE
6.1%
S
6.9%
SW
10.6%
W
14.7%
NW
11.5%

Temperature Range

Average: 17.8°C
Range: -4°C to 32°C
-4°C 32°C

Visibility

Average: 9.4 SM
Below 3 SM: 1.7%
Fog Frequency: 3.2%

Best Months for VFR

November September April

Runway Wind Analysis

Runway 05/23
Favorable wind: 100%
Avg crosswind: 4.7 kt

Statistics computed from 9,277 METAR observations (Sep 2025 - May 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.