Runways at KNJW
According to OurAirports data (compiled from AIP and FAA sources), Joe Williams Naval Outlying Field (Preston) has one runway: 13/31 - 2,431 m long (7,976 ft), 46 m wide, asphalt surface.
Joe Williams Naval Outlying Field (Preston) (KNJW)
United States · elevation 539 ft AMSL
· 32.7985, -88.8343
About Joe Williams Naval Outlying Field (Preston)
Joe Williams Naval Outlying Field (Preston) is an airport with the ICAO code KNJW. Country: United States. Nearest settlement listed in the database: Preston. OurAirports classifies it as a small airport. Its ICAO code starts with the KN prefix, which marks airports in United States. No IATA code is assigned, which is typical for airports without scheduled traffic. The airport reference point sits at 32°47'55"N, 88°50'04"W, at an elevation of 539 ft (164 m) above sea level. The applicable time zone is America/Chicago.
Satellite view of KNJW
Aerial imagery showing the runway and apron layout - the zoom is matched to the longest runway.
Runways of KNJW
| Threshold | Course | Length | Width | Surface |
|---|---|---|---|---|
| 13 | 130° | 2,431 m (7,976 ft) | 46 m (150 ft) | asphalt |
| 31 | 310° |
The course is derived from the runway designator (number × 10), not from a survey - the actual magnetic bearing can differ by a few degrees.
Declared distances (TORA, TODA, ASDA, LDA) are published in the national AIP - they are not part of this table.
Climate at Joe Williams Naval Outlying Field (Preston) - statistics from METAR reports
What the METAR reports from KNJW for 2023-2025 show - counted hour by hour.
We computed these statistics from 24,049 METAR reports issued by KNJW in 2023-2025. VFR conditions prevailed 80% of the time, MVFR 10% and IFR or LIFR 9%. Best month for VFR flying: August (92% of hours VFR). Most IFR and LIFR hours: December (22%).
Through the day, IFR or LIFR conditions are most frequent around 13:00 UTC (19% of reports at that hour) and least frequent around 00:00 UTC (4%).
Fog (FG) was reported on 30 days a year on average, most often in November. Thunderstorms (TS) occurred on 65 days a year on average, and snowfall on 1.4.
The wind most often blows from S (180°) - 8% of reports. Calm (0 kt) made up 21% of reports, and gusts of 25 kt or more appeared in 2%. Warmest month: August (average high 33.4 °C); coldest: January (average low 2.9 °C).
Year
Selected period in numbers: 2023-2025
- VFR hours
- 80%
- IFR/LIFR hours
- 9%
- Avg high
- 24.7 °C
- Avg low
- 13.4 °C
- Fog days
- 30
- Thunderstorm days
- 65
- Snow days
- 1.4
- Prevailing wind
- S · 8%
- Gusts ≥ 25 kt
- 2%
Day counts are for the selected period (for all years - the yearly average).
- VFR 80%
- MVFR 10%
- IFR 5%
- LIFR 4%
The top of each bar is the average daily high, the bottom the average daily low (usually around dawn), in °C.
Wind rose
- 1-10 kt
- 11-20 kt
- over 20 kt
- calm: 21%
Most often: S - 8% of reports. Each petal shows the direction the wind blows from (as in METAR) - the longer it is, the more often. Colour shows wind speed.
Month by month
| Month | Avg high °C | Avg low °C | VFR | IFR/LIFR | Fog days | Thunderstorm days | Snow days |
|---|---|---|---|---|---|---|---|
| January | 13.7 | 2.9 | 66% | 14% | 2.1 | 3.8 | 0.7 |
| February | 19.4 | 7.0 | 68% | 13% | 2 | 1.7 | 0.3 |
| March | 21.8 | 9.9 | 79% | 9% | 3.4 | 5.7 | 0 |
| April | 25.0 | 13.5 | 78% | 10% | 2.7 | 7.8 | 0 |
| May | 27.8 | 17.4 | 83% | 8% | 3 | 7.3 | 0 |
| June | 31.2 | 20.4 | 89% | 5% | 1.4 | 12 | 0 |
| July | 32.4 | 22.5 | 90% | 5% | 1.6 | 16 | 0 |
| August | 33.4 | 21.6 | 92% | 5% | 3 | 5.3 | 0 |
| September | 30.2 | 18.7 | 89% | 6% | 1.7 | 2.7 | 0 |
| October | 25.8 | 12.8 | 86% | 7% | 2.7 | 0.3 | 0 |
| November | 20.4 | 9.4 | 75% | 12% | 4 | 1.3 | 0.3 |
| December | 15.8 | 5.3 | 61% | 22% | 2.8 | 1 | 0 |
Temperatures are averages of daily highs and lows. Day counts are the average per month over the period.
Runway headings and wind
The thresholds are oriented as follows: 13/31 on 130° and 310° magnetic. A threshold designator is its magnetic heading divided by ten (ICAO Annex 14), so the runway axis can be read straight off the numbers.
For the 13/31 axis, wind from the south-west (around 220°) or from the north-east (around 40°) blows perpendicular to the runway and produces the largest crosswind component. Wind from around 130° or 310° acts along the runway, as a headwind or a tailwind. The decoder on this page computes those components automatically from the current METAR.
METAR and TAF for KNJW
Weather reports for Joe Williams Naval Outlying Field (Preston) are published under the ICAO code KNJW. A METAR is an observation of current conditions, usually issued every 30 or 60 minutes; a TAF is a forecast for the airport area, typically covering 9 to 30 hours.
The decoder breaks the KNJW report down into its parts: wind direction and speed including gusts and variability, visibility (including CAVOK and directional minimum visibility), weather phenomena by WMO code, cloud layers with their bases, temperature and dew point, QNH pressure, and the resulting flight category - VFR, MVFR, IFR or LIFR - using FAA thresholds.
Not every airport issues its own reports; many smaller airfields have no weather station. If no current data is available for KNJW, check the nearby airports listed below.
Reports always use UTC (the Z suffix). The America/Chicago zone is GMT-06:00 in winter and GMT-05:00 in summer - that is the shift to apply to the time in the report to get local time at the airport.
The closest airports in the database, measured in a straight line from the reference point, are Philadelphia Municipal Airport (KMPE, 27 km), Naval Air Station Meridian / McCain Field (Lauderdale) (KNMM, 38 km), Louisville Winston County Airport (KLMS, 44 km). When no report is available for KNJW, they usually give the best approximation of conditions in the area.
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Looking for a report from a specific day?
The METAR archive for KNJW goes back to 04/04/2005. Pick a date and see every observation from that day.
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