KNRB/NRB METAR & TAF Naval Station Mayport / Admiral David L McDonald Field

Jacksonville, FloridaElevation 15 ftMedium airport

CURRENT STATUS

UNKNOWN8 min old

No ceiling.

FLIGHT CATEGORY

UNKNOWN

ceiling & visibility

WIND

Calm

no steady wind

CEILING

None

no BKN/OVC layer

ACTIVE NWS ALERTS

Active weather alerts

Coastal Flood WarningSevere · Expected · Likely

25 0747Z to 28 0900Z

Coastal Nassau; Coastal Duval; Coastal Flagler; Northeast Coastal St. Johns; Southeast Coastal St. Johns

* WHAT...For the Coastal Flood Warning, significant coastal flooding around times of high tide. For the High Surf Advisory, large breaking waves of 8 to 10 feet. For the High Rip Current Risk, dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...For the Coastal Flood Warning, until 5 AM EDT Wednesday. For the High Surf Advisory, until 2 AM EDT Wednesday. For the High Rip Current…

Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Rip Current StatementModerate · Expected · Likely

25 0747Z to 28 0600Z

Coastal Nassau; Coastal Duval; Coastal Flagler; Northeast Coastal St. Johns; Southeast Coastal St. Johns

* WHAT...For the Coastal Flood Warning, significant coastal flooding around times of high tide. For the High Surf Advisory, large breaking waves of 8 to 10 feet. For the High Rip Current Risk, dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...For the Coastal Flood Warning, until 5 AM EDT Wednesday. For the High Surf Advisory, until 2 AM EDT Wednesday. For the High Rip Current…

Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

High Surf AdvisoryMinor · Expected · Likely

25 0747Z to 28 0600Z

Coastal Nassau; Coastal Duval; Coastal Flagler; Northeast Coastal St. Johns; Southeast Coastal St. Johns

* WHAT...For the Coastal Flood Warning, significant coastal flooding around times of high tide. For the High Surf Advisory, large breaking waves of 8 to 10 feet. For the High Rip Current Risk, dangerous rip currents. * WHERE...Northeast Florida Beaches. * WHEN...For the Coastal Flood Warning, until 5 AM EDT Wednesday. For the High Surf Advisory, until 2 AM EDT Wednesday. For the High Rip Current…

Take the necessary actions to protect flood-prone property. If travel is required, do not drive around barricades or through water of unknown depth. Inexperienced swimmers should remain out of the water due to dangerous surf conditions. Swim near a lifeguard. If caught in a rip current, relax and float. Don't swim against the current. If able, swim in a direction following the shoreline. If unable to escape, face the shore and call or wave for help.

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

CURRENT METAR

Decoded observation

Observed 0352Z (11:52 PM local) · 8 min old

KNRB is currently UNKNOWN. Wind information is unavailable. Visibility was not reported. No cloud information was reported.

ALTIMETER

30.19 inHg

1022.4 hPa, above standard.

WEATHER & HAZARDS

No significant hazards

No precipitation or obscuration reported.

Codes in this report: AUTO RMK AO2

Hover or tap any group for a plain-English explanation.

REMARKS: DECODED

AO2

automated station with a precipitation discriminator (can tell rain from snow)

SLP224

sea-level pressure 1022.4 hPa

PWINO

present-weather sensor not operating

TSNO

thunderstorm/lightning sensor not operating

TERMINAL AERODROME FORECAST

TAF timeline

Issued 1500Z (11:00 AM local) · valid to 1500Z (11:00 AM local)

KNRB forecast starts VFR at 15Z. Worst period is 15Z to 18Z with VFR possible (GUST). Conditions are roughly steady over the period.

Maximum temperature 23°C expected at 1800Z on day 23.
Minimum temperature 18°C expected at 1000Z on day 24.

VFR

BKN25025,000 ft

1500Z11:00 AM1948Z3:48 PM0036Z8:36 PM0524Z1:24 AM1012Z6:12 AM1500Z11:00 AM

Codes in this report: 9999 FEW SCT BKN

Tap any group to decode it.

FAA: no delays reported at NRB.

Source: FAA System Operations (ASWS). Operational status only; verify with official FAA sources and NOTAMs.

SUGGESTED RISK · TRAINING USE

Suggested risk level: Low

›Flight category could not be determined.

A suggested risk level for training and situational awareness only, not a go/no-go authority. Verify with official sources and apply your personal minimums.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

Current aviation conditions show flight category UNKNOWN, ceiling none. Forecast suggests tonight chance rain showers, low near 68F, 27% chance of precipitation. Key risks: strong winds in the forecast. Note: the NWS forecast for now reads "Slight Chance Rain Showers" but the current METAR shows none of it; the observation and forecast differ, so trust the METAR for current conditions.

PILOT WEATHER NOTES

Strong winds in the forecastWeather.gov

Tonight: winds up to 35 kt. Re-check crosswind components closer to departure.

Day	Conditions	Temp F	Wind	Gusts	Precip	Pilot note
Tonight	Chance Rain Showers	68	NE 19 kt	35 kt	27%	Strong winds in the forecast
Monday	Slight Chance Rain Showers then Partly Sunny	72/66	NE 19 kt	33 kt	21%
Tuesday	Mostly Sunny	75/68	NE 17 kt	25 kt	12%
Wednesday	Mostly Sunny then Slight Chance Rain Showers	76/69	NE 19 kt	–	22%
Thursday	Chance Rain Showers	76/68	NE 18 kt	–	36%
Friday	Chance Rain Showers	75/68	NE 15 kt	–	33%
Saturday	Chance Rain Showers	76/67	NE 12 kt	–	26%
Sunday	Chance Rain Showers	77	E 9 kt	–	42%

Note: the NWS forecast for now reads "Slight Chance Rain Showers" but the current METAR shows none of it; the observation and forecast differ, so trust the METAR for current conditions.

Source: National Weather Service (office JAX). Forecast issued 0243Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

RUNWAYS & WIND

1 runway · crosswind ranking

WIND USED

Wind calm or variable

Crosswind ranking is unavailable until the wind has a steady direction.

Components are estimates from the current METAR wind and runway heading. Verify with the Chart Supplement and NOTAMs.

RUNWAYS

Runway detail & declared distances

1 runway · longest 8,001 ft

05/23

Dimensions

8,001 x 200 ft

Surface

Asphalt (good)

Edge lights

HIGH

RWY 05

REILYes

VGSIPAPI (P4L)

RWY 23

REILYes

VGSIPAPI (P4L)

Traffic patternRight

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Field elevation

15 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

2244Z 6:44 PM

Sunrise

1135Z 7:35 AM

Loggable night

2309Z (7:09 PM local) → 1110Z (7:10 AM local)

end of evening to start of morning civil twilight

Position lights required

2244Z (6:44 PM local) → 1135Z (7:35 AM local)

sunset to sunrise (91.209)

Night passenger currency

2344Z (7:44 PM local) → 1035Z (6:35 AM local)

1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Naval Station Mayport / Admiral David L McDonald Field is in Jacksonville, Florida. Field elevation 15 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipNavy owned

UsePrivate use

TypeMedium airport

ManagerTEG MCNEAL

Manager phone904-270-7126

AttendedALL FRI, 1300–2300Z

CHARTS & AIRSPACE

ICAO / IATAKNRB / NRB

SectionalJACKSONVILLE

Center (ARTCC)JACKSONVILLE

Flight service (AFSS)GAINESVILLE

RegionFlorida

CountryUnited States

Coordinates30.3911, -81.4247

Distance from city1 NM NW

SERVICES & LIGHTING

Control towerTowered

Field lightingSee remarks

BeaconSunset to sunrise · Split white-green (military)

FREQUENCIES

Communications

124.9

JACKSONVILLE APP/DEP

A/D

26.86

ATIS

126.5

GND

30.85

PTD

118.75

TWR

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

KNRB traffic patterns

2026-06-30 to 2026-09-09, 6 days observed · data 2026-10-23

Insufficient confidence

TRAFFIC VOLUME (30-DAY)

AVG LANDINGS/DAY

3

AVG OPS/DAY

4.5

Operations trend (2 days)

Busiest day: Thu · Busiest month: Aug

FLEET MIX

Helicopter 100%

Mostly rotorcraft.

TOP AIRCRAFT TYPES

›H60 (Helicopter) · ~4 landings/mo

LIKELY BASED AIRCRAFT

Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly rotorcraft.

›H60 (Helicopter)

This is an estimate based on repeated flight patterns, not registration data. Do not rely on it to identify specific aircraft or owners.

Data limitations (4)

›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.

›Some aircraft do not transmit usable ADS-B and are not counted.

›Aircraft types and based estimates are inferred and may be wrong.

›This is not official ATC, FAA, or airport data.

NEARBY AIRPORTS

Weather reference stations

Current flight category at nearby reporting stations.

KCRG Jacksonville Executive at Craig Airport

6 NM SW

VFR

KJAX Jacksonville International Airport

15 NM NW

VFR

KNIP Jacksonville Naval Air Station (Towers Field)

16 NM SW

VFR

KNEN Whitehouse Naval Outlying Field

VFR

KSGJ Northeast Florida Regional Airport

26 NM S

MVFR

AIRPORT REMARKS

Operational remarks

›JASU: 1(NC-8) 1(GTC-85) 1(A/NCPP-105).

›MISC: FOR CIV ACFT LDG PMT (CALP) REQ CTC AIRFIELD MGMT C904-445-8326.

›FIRE EQUIP (PG4): 1500 GAL STRYKER (242) EQUIPPED WITH A 210 GAL FOAM TANK AND 500 LBS. OF HALON, 2-1250 GPM PUMPERS WITH 750 GALS OF WATER, 1-2000 GPM ARL APPARATUS WITH 500 GALS OF WATER, 1 ADVND LIFE SUPPORT TRNSP AMBULANCE, 1 HEAVY RSCU TRUCK WITH HAZMAT AND TECHNICAL RSCU RESP CAPABILITIES, 1 HAZMAT DECONTAMINATION TRAILER, 1 AIR CART FOR RE-FILLING AIR BOTTLES, 2 UTILITY TRUCKS, 1 COMMAN D VEHICLE.

›ELECTRONIC MAINT (PG3): GND PWR UNITS: 12 EXTERNAL GND START UNITS (ALL PERM UNITS ON H-60 RAMP)

›SNOW REMOVAL EQUIP (PG4): 1-15,000 LB FORKLIFT.

›TSNT/HUNG ORDNANCE/DIVERT ALERT; ORGANIC AIR-LAUNCHED WEAPONS SAFING CPBLY NA; TSNT MAINT NA; LIMITED TSNT PRK AVBL.

›RSTD: 24 HR PPR/CIVIL ACFT LNDG PERMIT; PCN EXCEEDING 34 RQR 72 HR PPR - BASE OPS DSN 270-6130/31, C904-270-6130/31. PARTICIPATING ACFT ONLY DURG SPL LCL OPS.

›CAUTION: LGT TO HVY BIRD ACT ON AND IN VCNTY OF ARPT. VESSELS WITH MASTS TO 196 FT FQTLY BERTHED 800 FT LEFT OF RWY 23 THLD. LARGE VESSELS WITH MASTS UP TO 150 FT FQTLY TRANSIT THE RIVER CHAN ADJ TO APCH END RWY 23 DUR FINAL APCH.

›CAUTION: EXER VIGILANCE DURG RWY 05 OPS DUE TO EXTSV CTLD/UNCTLD ACFT INVOF CRAIG MUNI ARPT. PADS 1 & 3 HAVE ALTERED LGT & APVD FOR LCL BASED ACFT ONLY.

›TFC PAT: R TFC RWY 23 & L TFC RW 05. SIMULTANEOUS LDG/DEP BTN HEL CONDUCTED ON PARL TWY LCTD 325 FT FM RWY 05/23.

›NS ABTMT: MAYPORT VILLAGE AND N BANK OF ST JOHNS RIVER ARE NOISE SENSITIVE. NO XW/BASE TURNS BTN TWY BRAVO-FOXTROT.

›CSTMS/AG/IMG: AVBL DURG AFLD HRS WITH 24 HR PPR.

›AVBL DURG AFLD OPS HRS.

›FSS-GAINESVILLE GNV-NOTAM JAX.

›HOOK E28(B) (1200 FT). 30 MIN NOTICE FOR ARSTMT UNLESS FLD IN DIV STS.

›HOOK E28(B) (1186 FT). 30 MIN NOTICE FOR ARSTMT UNLESS FLD IN DIV STS.

›CUSTOMS/AGRICULTURE/IMG AVBL FOR ACFT WITH 30 PSGRS OR LESS; MON-FRI EXCP HOLS 0800-1700. OTHER TIMES 48 HR PPR.

›TRAN ALERT: GND TRANSPORTATION UNAVBL FOR AIRCREW OR PAX.

›MISC: CLASS D AIRSPACE AND CLASS E AIRSPACE 700 FT AND BELOW EFF 1200-0400Z++ (DT 1100-0400Z) SPECIAL LOCAL OPS 0400-0700Z++ MON-THU; 1300-2300Z++(DT 1200-2200Z) FRI; CLSD SAT, SUN, AND HOL. OTHER TIMES CLASS G AIRSPACE 700 FT AND BELOW. JACKSONVILLE CLASS E AIRSPACE 700 FT AND ABV EFF CONT.

›CAUTION: EXP SIMUL SAME DRCTN OPS DURG DUAL RWY OPS.

›FOR CD CTC JACKSONVILLE APCH AT 904-741-0284.

›CLSD SAT, SUN & FEDERAL HOLS UNLESS OTRW NOTAM.

›AFT HR FUEL NA; TSNT HEL HOT RFL CTC BASE OPS 904-270-6130/DSN 270-6130; COORD RFL TIMES HSM-40 ODO - 904-270-6332/DSN 960-6332 (DIAL 0 & REQ MAINT CTL); FIXED WING HOT RFL NA.

OFFICIAL LINKS & SOURCES

↗Official METAR on AviationWeather.gov

↗Search NOTAMs (official FAA NOTAM Search)

↗Official airport website

↗Wikipedia

↗KNRB on OurAirports

FREQUENTLY ASKED

Does KNRB have a METAR?

Yes. KNRB has a current METAR observation, decoded into plain English on this page.

Does KNRB have a TAF?

Yes, a TAF is issued for KNRB; the decoded forecast timeline is shown above.

What is the field elevation at KNRB?

KNRB sits at 15 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for KNRB?

No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.