Naval Station Mayport / Admiral David L McDonald Field (KNRB) Aviation Weather: METAR, TAF & ATIS
As of 5:05 AM ET, Oct 30, KNRB is currently VFR with winds from 010° at 9 knots, visibility 8 statute miles, and a 25,000 ft ceiling. The FAA lists no ground stop or delay program for KNRB right now.
Live aviation weather for Naval Station Mayport / Admiral David L McDonald Field in Jacksonville, FL, including METAR, TAF, ATIS, flight category, wind, visibility, ceiling, altimeter and runway crosswinds.
Naval Station Mayport / Admiral David L McDonald Field (KNRB) is a regional airport serving Jacksonville, FL at a field elevation of 15 ft. KNRB reports its own METAR and publishes a TAF, decoded live on this page as flight category, wind, visibility, ceiling and altimeter. It has one runway (05/23), the longest 8,001 ft. The official FAA airport diagram is at the bottom of the page.
Wind from the north (010°) at 9 kt, visibility 8 statute miles, scattered clouds at 12,000 ft, broken clouds at 25,000 ft, temperature 23°C (74°F), altimeter 30.06 inHg. Conditions are Visual Flight Rules (VFR), ceiling 25,000 ft.
SPECI KNRB 300905Z 01009KT 8SM SCT120 BKN250 23/19 A3006 RMK AO2 T02330183 $
What changed at KNRB?
Since the 0752Z (3:52 AM EDT) report, compared automatically against the latest METAR.
- A ceiling formed at 25,000 ft.
The latest report is an off-schedule special (SPECI), issued because conditions changed significantly. What is a SPECI? →
Current pilot readout for KNRB
KNRB is currently VFR with winds from 010° at 9 knots, visibility 8 statute miles, and a 25,000 ft ceiling. the wind favors northeast-facing runway ends (05). Density altitude is approximately 850 ft (field elevation 15 ft). Review the latest TAF below for forecast changes before departure.
KNRB by the numbers
What the long-run records say about flying here, computed for this airport alone.
KNRB reported VFR in 87% of daylight observations over 20 years, about 285 flyable days a year. July is the most reliable month and December the least, with IFR or worse 12% of the time. When conditions drop it is usually low ceilings rather than fog (ceilings under 1,000 ft 3% of hours, visibility under 3 miles 2%).
Over 20 years of hourly winds, runway 23 had the best headwind 52% of the time, runway 05 48%, and winds were calm 11% of hours. Winds most often blow from the northeast. Crosswind on the best available runway topped 15 kt in 1% of hours.
Thunderstorms were reported on about 74 days a year. 64% of storm hours fall in June, July and August, peaking in July when storms were in the air 4% of the time.
Fog was reported on about 33 days a year, and fog or mist on 123. February and December are the foggiest months, with fog in 12% of hours, against 2% in July.
Field elevation is 15 ft, but on a median summer afternoon the air performs like 1,704 ft, 1,689 ft higher. Plan for a longer takeoff roll and a weaker climb from June to August.
Gusts showed up in 11% of hours, typically 8 kt above the steady wind, and the strongest credible gust on record was 76 kt. April is the windiest month (mean 8 kt) and July the calmest.
Sources: hourly observations 2006 to 2025 and the per-runway wind climatology 2006 to 2025. Historical summaries, not a forecast: check the current METAR, TAF and a briefing before flight.
New to aviation weather? How to read a METAR → · What VFR/MVFR/IFR mean → · Decode any METAR/TAF → · Density altitude calculator →
Runway wind check
Estimated head/tailwind and crosswind for each runway end from the current reported wind.
| Runway | Length | Surface | Head / Tail | Crosswind |
|---|---|---|---|---|
| 05FAV | 8,001 ft | ASP | 8 kt head | 5 kt left |
| 23 | 8,001 ft | ASP | 8 kt tail | 5 kt right |
Open the crosswind calculator to try your own wind and runway numbers →
KNRB runways
1 physical runway · 2 runway ends. Each card opens the runway's intelligence page: equipment and lighting, LAHSO, frequencies, today's configuration, predicted use, history and approaches.
- Restricted (NOTAM)Runway 05/238,001 × 200 ft · ASPCurrent useno stated-runway source at KNRBWind
- 05
- 8 kt headwind · 5 kt crosswind from left
- 23
- 8 kt tailwind · 5 kt crosswind from right
2 active equipment NOTAMsView Runway Intelligence →
“Current use” is what the facilitystates; wind components are arithmetic on the current METAR against TRUE headings; status reflects NOTAMs received through SWIM, the tower's TFDM record and the D-ATIS — a runway reads “Open” only with a complete NOTAM picture.
24-hour trend
Wind, ceiling and flight category over the last 24 hours.
Over the last 23 h: wind 13→9 kt, ceiling 800 ft → 25,000 ft.
KNRB weather radar
Live NEXRAD + lightning, with a 4-hour future-radar forecast. Drag to pan, tap ⚡ to toggle lightning.
Radar: NOAA/NWS via IEM · Forecast: NOAA HRRR · Lightning: NOAA · Map © Stadia Maps © OpenMapTiles © OpenStreetMap
NOAA NEXRAD composite and lightning, updated about every five minutes; amber frames are HRRR model guidance, not observed radar. Not for navigation.
Pilot reports (PIREPs) within 100 NM of KNRB
Reported by pilots in flight over the past 6 hours, via aviationweather.gov.
Show raw report
JAX UA /OV GNV/TM 0832/FL045/TP C172/WX HZ
JAX UAHeader: reporting station and UA: a routine pilot report.OV GNVLocation: fix or navaid, optionally with a radial and distance in NM.TM 0832Reported at 08:32 UTC.FL045Altitude: 4,500 ft MSL.TP C172Aircraft type reporting.WX HZWeather and flight visibility observed.Show raw report
CRG UA /OV CRG/TM 0752/FL360/TP B763/TB NEG
CRG UAHeader: reporting station and UA: a routine pilot report.OV CRGLocation: fix or navaid, optionally with a radial and distance in NM.TM 0752Reported at 07:52 UTC.FL360Altitude: 36,000 ft MSL.TP B763Aircraft type reporting.TB NEGTurbulence: none reported.Show raw report
JAX UA /OV OCF/TM 0705/FL100/TP C408/WX VMC/TB SMOOTH
JAX UAHeader: reporting station and UA: a routine pilot report.OV OCFLocation: fix or navaid, optionally with a radial and distance in NM.TM 0705Reported at 07:05 UTC.FL100Altitude: 10,000 ft MSL.TP C408Aircraft type reporting.WX VMCWeather and flight visibility observed.TB SMOOTHTurbulence: smooth.Show raw report
JAX UA /OV GNV/TM 0630/FLDURD/TP PC12/SK BKN012
JAX UAHeader: reporting station and UA: a routine pilot report.OV GNVLocation: fix or navaid, optionally with a radial and distance in NM.TM 0630Reported at 06:30 UTC.FLDURDReported during descent.TP PC12Aircraft type reporting.SK BKN012Sky condition: cloud bases and tops in hundreds of feet MSL.Show raw report
JAX UA /OV VQQ/TM 0525/FLDURD/TP B737/SK BKN006
JAX UAHeader: reporting station and UA: a routine pilot report.OV VQQLocation: fix or navaid, optionally with a radial and distance in NM.TM 0525Reported at 05:25 UTC.FLDURDReported during descent.TP B737Aircraft type reporting.SK BKN006Sky condition: cloud bases and tops in hundreds of feet MSL.Show raw report
JAX UA /OV JAX/TM 0405/FLDURD/TP B752/SK FEW010
JAX UAHeader: reporting station and UA: a routine pilot report.OV JAXLocation: fix or navaid, optionally with a radial and distance in NM.TM 0405Reported at 04:05 UTC.FLDURDReported during descent.TP B752Aircraft type reporting.SK FEW010Sky condition: cloud bases and tops in hundreds of feet MSL.⚠️ PIREPs are unverified pilot reports. Not for operational use: conditions change between reports.
Recent aviation weather trends at KNRB
From ATIS Alerts' hourly weather history.
Over the past 24 hours, KNRB reported a mix of conditions, most often marginal VFR across 26 observations, with 2 flight-category changes. The strongest gust reached 20 kt, the lowest ceiling was 800 ft. Wind most often came from the N.
Most recent change: MVFR → VFR
Most recent change: MVFR → VFR
Share of hours each runway had the most headwind. From wind reports, not ATC assignments.
- 05
- 96%
- 23
- 4%
TAF | Terminal Aerodrome Forecast
Issued 0700Z (3:00 AM EDT)
TAF KNRB 300700Z 3007/3107 03015G22KT 9999 SCT020 BKN050 OVC250 QNH3003INS BECMG 3014/3016 03015G22KT 9999 VCTS BKN030CB BKN050 QNH3006INS BECMG 3102/3104 05009KT 9999 NSW SCT020 BKN050 OVC250 QNH3010INS AUTOMATED SENSOR METWATCH 3007 TIL 3009 TX24/3018Z TN21/3010Z FN00324
New to TAFs? How to read one →
Get KNRB weather alerts in Telegram
Stop refreshing aviation weather manually. Track KNRB in ATIS Alerts and get notified when a new METAR changes the picture: a category drop, or wind and ceiling moving toward your minimums.
Track KNRB free on TelegramLive KNRB Weather
Live crosswind meter
Measured by KNRB's own weather station.
Wind is 33° off runway 05, the end with the most headwind right now.
Asphalt · 8,001 ft. Headings from FAA runway data. Not for navigation.
Field aerial
North up
Runway 05/23 drawn from FAA threshold coordinates.
Imagery: USGS The National Map (public domain). Something off? ✏️ Suggest an edit
Nearby TFRs
Active FAA TFRs near KNRB
FAA TFR data shows an active temporary flight restriction near KNRB.
View all active US TFRs → · Official FAA TFR ↗
Verify with official FAA TFR sources before flight.
Airport info
From the FAA airport record (cycle 2026-10-01) and OurAirports.
Services
- Fuel
- JP-5
- Attended
- Mon-Thu 1300-0400Z (DT 1200-0400) local; Fri 1300-2300Z local
- Control tower
- Yes
Airport
- Type
- Regional airport
- ICAO
- KNRB
- IATA
- NRB
- FAA LID
- NRB
- City
- Jacksonville
- State
- Florida
- Country
- United States
- Elevation
- 15 ft
- Coordinates
- 30.3911, -81.4247
- Runways
- 1 physical runway · 2 runway ends
- Longest runway
- 8,001 ft
- Weather reporting
- Reports METAR
- TAF
- Published
- ATIS
- 26.86 MHz
- Time zone
- America/New_York
- Next sunset
- 12h 49m
Is there a ground stop at NRB today? Delay status and history →
Run a flight school, FBO, or club here? Embed KNRB's live status on your website, free →
Nearby airports
Compare nearby METAR/TAF stations within 25, 50 and 100 NM before departure or arrival.
Within 25 NM
9 airports+3 more within 25 NM
25–50 NM
7 airports+1 more within 50 NM
50–100 NM
8 airports+2 more within 100 NM
RC flying fields nearby
AMA model-aircraft club fields around this airport: live wind, crosswind & flyability on each page.
- RC Club of Jacksonville - Island Dr , Jacksonville, FL · 8 mi
- Island Flyers R/C Club - Nassau County Lofton Creek Landfill , Fernandina Beach, FL · 18 mi
- Gateway RC Club Flying Field - Lannie Rd , Jacksonville, FL · 21 mi
Historical Flying Weather at KNRB
2006–2025 · ATIS Alerts Flying Weather Index
Based on historical observations from 2006–2025, KNRB reported VFR conditions during about 86.7% of valid daylight observations, with an estimated 285 VFR flying days a year. July had the most VFR weather; December had the most instrument conditions. Surface winds averaged 7.6 kt, calm 6.8% of the time.
Full historical breakdown
Flight category by month
| Month | VFR % | MVFR % | IFR % | LIFR % |
|---|---|---|---|---|
| Jan | 79.9 | 11.3 | 4.7 | 4.1 |
| Feb | 79.0 | 10.8 | 4.8 | 5.4 |
| Mar | 85.7 | 7.8 | 3.9 | 2.6 |
| Apr | 89.8 | 7.6 | 1.8 | 0.7 |
| May | 91.4 | 6.7 | 1.4 | 0.5 |
| Jun | 92.4 | 6.3 | 1.0 | 0.4 |
| Jul | 94.8 | 4.2 | 0.8 | 0.2 |
| Aug | 92.9 | 5.8 | 1.0 | 0.3 |
| Sep | 87.9 | 10.4 | 1.5 | 0.2 |
| Oct | 87.3 | 9.9 | 2.0 | 0.8 |
| Nov | 80.7 | 12.0 | 5.1 | 2.3 |
| Dec | 75.1 | 12.6 | 6.5 | 5.8 |
Average wind by month
| Month | Mean wind (kt) |
|---|---|
| Jan | 7.2 kt |
| Feb | 7.3 kt |
| Mar | 8.0 kt |
| Apr | 8.4 kt |
| May | 8.3 kt |
| Jun | 7.5 kt |
| Jul | 6.6 kt |
| Aug | 6.8 kt |
| Sep | 8.3 kt |
| Oct | 8.3 kt |
| Nov | 7.8 kt |
| Dec | 7.1 kt |
Historical summary of past observations: not a forecast or safety rating. Always check the current METAR, TAF, and a weather briefing before flight.
KNRB airport diagram
Official FAA taxiway and runway layout. Tap to zoom.
Official FAA airport diagram · d-TPP cycle 2611 · Not for navigation. Download the official FAA PDF ↗
Customize your NRB shirt or mug
NRB's real runway layout on the back, elevation and tower frequency on the front. Add your tail number on the sleeve.
Pilot PIREPs for Naval Station Mayport / Admiral David L McDonald Field (KNRB)
Community-submittedCommunity-submitted airport notes from pilots about runway conditions, wildlife, FBOs, fuel, turbulence, ramp access, and local tips.
Read recent community-submitted pilot notes for Naval Station Mayport / Admiral David L McDonald Field, including runway conditions, wildlife activity, FBO/fuel notes, turbulence, ramp access, and local airport tips.
⚠️ Pilot PIREPs on ATIS Alerts are community-submitted airport notes for situational awareness only. They are not official FAA PIREPs, NOTAMs, weather briefings, airport advisories, or flight-planning guidance. Always verify with official FAA/NWS sources, airport management, ATC, and current publications.
No Pilot PIREPs have been submitted for KNRB yet. Recently flew here? Help the next pilot by leaving a quick airport note.
Pilot PIREPs are community pilot notes for situational awareness only, not official FAA PIREPs or advisories. Verify with official sources. Notes are moderated before they appear; helpful marks and reports help us keep them useful.
⚠️ Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.
No D-ATIS at this airport, showing METAR.
Spotted incorrect airport info? ✏️ Suggest an edit