KNRB TAF
Terminal aerodrome forecast for Naval Station Mayport / Admiral David L McDonald Field (NRB · KNRB), Jacksonville, FL. Issued 6 Aug 2026 2336Z, valid 2300Z to 2300Z, decoded period by period below.
All of Naval Station Mayport / Admiral David L McDonald Field — runways, frequencies, charts and live weatherTAF issued 6 Aug 2026 2336Z
valid 2300Z to 2300ZTAF KNRB 0623/0723 10010KT 9999 VCSH SCT040CB BKN120 BKN250 QNH3010INS FM070400 12006KT 9999 FEW120 SCT250 QNH3012INS FM071200 09010G15KT 9999 VCSH BKN035CB BKN100 OVC250 QNH3011INS TEMPO 0715/0720 6000 -SHRA BKN020 OVC100 AUTOMATED SENSOR METWATCH 0705 TIL 0710 TX30/0717Z TN25/0711Z FN20022
Times are UTC (Zulu), as they appear in the bulletin.
Period by period
| Period (UTC) | Change | Wind | Vis | Ceiling | Sky | Cat |
|---|---|---|---|---|---|---|
| 2300Z to 0400Z | Initial | 100° at 10 kt | 6+ SM | 12,000 ft BKN | Scattered at 4,000 ft AGL, Broken at 12,000 ft AGL, Broken at 25,000 ft AGL | VFR |
| 0400Z to 1200Z | FM | 120° at 6 kt | 6+ SM | Clear | Few at 12,000 ft AGL, Scattered at 25,000 ft AGL | VFR |
| 1200Z to 2300Z | FM | 090° at 10-15 kt | 6+ SM | 3,500 ft BKN | Broken at 3,500 ft AGL, Broken at 10,000 ft AGL, Overcast at 25,000 ft AGL | VFR |
| 1500Z to 2000Z | TEMPO | Calm | 3.73 SM | 2,000 ft BKN | Broken at 2,000 ft AGL, Overcast at 10,000 ft AGL | MVFR |
What the change groups mean
- FM
- From — a rapid, permanent change to the conditions that follow.
- TEMPO
- Temporary — expected for less than half the period, in spells under an hour.
What the categories mean
- VFR
- Visual flight rules — ceiling above 3,000 ft and visibility greater than 5 SM.
- MVFR
- Marginal VFR — ceiling 1,000 to 3,000 ft and/or visibility 3 to 5 SM.
Frequently asked
What is the current TAF for KNRB?
The forecast issued 6 Aug 2026 2336Z for Naval Station Mayport / Admiral David L McDonald Field reads: TAF KNRB 0623/0723 10010KT 9999 VCSH SCT040CB BKN120 BKN250 QNH3010INS FM070400 12006KT 9999 FEW120 SCT250 QNH3012INS FM071200 09010G15KT 9999 VCSH BKN035CB BKN100 OVC250 QNH3011INS TEMPO 0715/0720 6000 -SHRA BKN020 OVC100 AUTOMATED SENSOR METWATCH 0705 TIL 0710 TX30/0717Z TN25/0711Z FN20022
How far ahead does a TAF forecast?
A TAF covers a 24-hour period at most airports and 30 hours at larger ones, issued four times a day at 0000Z, 0600Z, 1200Z and 1800Z. It describes conditions within roughly 5 statute miles of the airport, not the surrounding area.
What do FM, BECMG and TEMPO mean?
FM (from) marks a rapid, permanent change at the stated time. BECMG (becoming) marks a gradual change over the stated window. TEMPO marks conditions expected for less than half the period, in spells of under an hour each. PROB30 and PROB40 give the probability of the conditions that follow.
More about KNRB
Forecasts from the US National Weather Service Aviation Weather Center. Times are UTC (Zulu). For planning and education only — always confirm with an official preflight briefing.