KBOS Runway 04L/22R — Boston Logan International Airport

Name: KBOS Runway 04L/22R wind climatology 2005–2025
Creator: ATIS Alerts

7,864 × 150 ft asphalt · true headings 020° / 200° · field elevation 20 ft

Runway 04L/22R at Boston Logan International Airport (KBOS) in Boston, MA is 7,864 ft long and 150 ft wide, asphalt, with true headings 020° and 200°. Over 2005–2025 the wind gave runway 04L the headwind 44.9% of the time and runway 22R 57.5%, with a crosswind above 15 kt in 5.1% of wind hours. KBOS publishes a digital ATIS, so this page shows the runway the tower is actually using right now and builds a record of how often each end is assigned.

Runway 04L/22R — current status

NO CLOSURE REPORTED

The current D-ATIS names no closure, restriction or outage for this runway. Runway NOTAMs are not monitored yet — verify before flight.

Sources: FAA runway record (OurAirports) · D-ATIS · D-ATIS 1754Z (1:54 PM EDT). Runway NOTAM monitoring (closures, lighting, navaid outages) is scheduled for the next phase; until then this card reflects only the FAA runway record and the airport's own D-ATIS.

Current active runways at KBOS

As stated by the airport's D-ATIS — the facility's own broadcast, not an estimate.

Information Uniform · 1754Z (1:54 PM EDT)

Arrivals

04R04L

Departures

04R

This configuration has been stated since 1654Z (12:54 PM EDT).

Show the D-ATIS text

BOS ATIS INFO U 1754Z. 01009KT 10SM FEW050 FEW250 26/11 A3002 (THREE ZERO ZERO TWO). APPROACHES ARE BEING CONDUCTED TO PARALLEL RUNWAYS. ILS 4R, VA 4L, DEP 4R. RWY 33R IS APPROVED FOR TURN OFF. READBACK ALL HOLD SHORT INSTRCNS AND ASSIGNED ALTITUDES. INCREASED BIRD ACTIVITY IN THE VICINITY OF LOGAN AIRPORT. NUMEROUS CRANES IN BOSTON AREA AND IN VICINITY OF LOGAN AIRPORT. RWY 9/27 CLSD. PILE DRIVING CONST ADJ TO THE AER 15R. ...ADVS YOU HAVE INFO U.

Current wind on Runway 04L/22R

Wind from the north (350°) at 9 kt

METAR 1754Z (1:54 PM EDT)

Runway 04L

FAVORED BY WIND

Headwind: 8 kt
Crosswind: 4 ktfrom left

Runway 22R

Tailwind: 8 kt
Crosswind: 4 ktfrom right

Components use TRUE runway headings and TRUE METAR wind. “Favored by wind” is arithmetic, not an ATC assignment.

ATIS Alerts Predicted Runway

Which runway at KBOS is likely to be in use over the next 12 hours — an estimate, not an ATC assignment.

Time	Likely runway	Confidence	Wind
Now1856Z · 2:56 PM EDT	04R and 04Lactive · D-ATIS stated by D-ATIS	stated	350° at 9 kt
+1 h1956Z · 3:56 PM EDT	33Lthen 33R	Low50%	330° at 9 kt G17
+2 h2056Z · 4:56 PM EDT	33Lthen 33R	Low47%	330° at 9 kt G17
+3 h2156Z · 5:56 PM EDT	33Lthen 33R	Low44%	330° at 9 kt G17
+6 h0056Z · 8:56 PM EDT	04Lthen 04R	Low27%	350° at 10 kt G19
+12 h0656Z · 2:56 AM EDT	04Lthen 04R	Low20%	350° at 10 kt G19

ATIS Alerts Predicted Runway is an estimate from the TAF wind forecast and runway geometry (most headwind, crosswind penalised, tailwind over 5 kt avoided, longest runway breaks ties). It is not an ATC assignment and does not know about noise abatement, traffic flow or construction unless the D-ATIS states them. TAF issued 1720Z (1:20 PM EDT).

Runway 04L/22R overview

Physical characteristics from the FAA-derived runway record.

Length: 7,864 ft
Width: 150 ft
Surface: Asphalt
Runway lights: Lighted
Airport elevation: 20 ft
FAA record status: Open

Runway 04L

True heading: 020°
Magnetic (approx.): ≈ 034°
FAA record: Open

Runway 22R

True heading: 200°
Magnetic (approx.): ≈ 214°
FAA record: Open

Runway 04L/22R numbers are magnetic; the stored geometry and every wind calculation on this page are TRUE north, so they never need a variation correction. Magnetic variation here is about 14.0°W (World Magnetic Model). Displaced thresholds, declared distances (TORA/TODA/ASDA/LDA), approach lighting, PAPI/VASI, ILS equipment and traffic-pattern direction are FAA NASR fields not yet loaded — they are omitted rather than guessed.

Recorded runway use at KBOS — last 30 days

How often the D-ATIS named each end for arrivals and departures (the facility's own statement).

ATIS Alerts records every change of KBOS's D-ATIS and turns it into a log of which runways the facility named for arrivals and departures. Recording started Sep 18, 2026 — 2 hours captured so far. Usage statistics appear once 24 hours are on record, and become meaningful after a few weeks.

Historical wind and crosswind on runway 04L/22R

20-year hourly climatology from the ASOS archive, computed per runway end.

From 175,153 hourly observations at KBOS (2005–2025), 167,701 with a steady wind direction (4.3% calm, variable or direction-less). One observation per clock hour; TRUE headings against TRUE wind.

Crosswind on runway 04L/22R (either end)

Mean crosswind

6.5 kt

median 5.9 kt

90th / 95th percentile

12.9 / 15.2 kt

max 42 kt

Above 10 kt

19.9%

> 15 kt: 5.1% · > 20 kt: 0.9%

Gust crosswind > 15 kt

14.1%

90th pct gust 18.2 kt

Strongest-crosswind month on average: Jan; calmest: Jul. Percentiles are streaming approximations (t-digest), accurate to about 0.1 kt.

Runway 04L

Headwind

44.9%

of wind hours

Tailwind > 5 kt

28%

> 10 kt: 9%

Wind-favored end

5.7%

most headwind of all runways

Runway 22R

Headwind

57.5%

of wind hours

Tailwind > 5 kt

20.4%

> 10 kt: 5.6%

Wind-favored end

9.8%

most headwind of all runways

“Wind-favored” counts the hours this end had the most headwind of every open runway at KBOS — wind arithmetic, not an ATC assignment (parallel runways with the same heading share the credit equally). Recorded D-ATIS use, where available, is the section above.

By wind direction

Wind-favored share of runway 04L and 22R by wind sector, 2005–2025
Wind from	Share of wind hours	04L favored	22R favored	Mean crosswind	Crosswind > 15 kt
N 338–023°	11%	37.5%	0%	3 kt	0%
NE 023–068°	7%	24.7%	0%	4.4 kt	0.7%
E 068–113°	12%	0%	0%	8.5 kt	5.6%
SE 113–158°	6%	0%	0%	6.7 kt	2.2%
S 158–203°	12%	0%	45.2%	1.8 kt	0.1%
SW 203–248°	16%	0%	26.9%	4.1 kt	0.1%
W 248–293°	20%	0%	0%	10.3 kt	13.3%
NW 293–338°	16%	0%	0%	9.5 kt	10%

By time of day (airport-local)

morning

04L favored 6.9% · 22R 7.7%

mean crosswind 6.6 kt · calm 5.3%

afternoon

04L favored 3.9% · 22R 7.5%

mean crosswind 7.9 kt · calm 2.1%

evening

04L favored 5.2% · 22R 12.7%

mean crosswind 6 kt · calm 3.7%

night

04L favored 6.4% · 22R 11.7%

mean crosswind 5.6 kt · calm 5.4%

Seasonal runway conditions

Monthly wind and weather statistics for runway 04L/22R at KBOS, 2005–2025
Month	Prevailing	Mean wind	Gusty	Mean xw	xw > 10	xw > 15	xw > 20	04L tail > 5	22R tail > 5	IFR	TS	Fog
Jan	W	10.4 kt	28.5%	7.8 kt	29.4%	9.8%	1.8%	27.1%	21%	11%	0.02%	11.7%
Feb	W	10.4 kt	27.3%	7.7 kt	29.7%	10.5%	2.2%	26.4%	21.2%	11.6%	0.03%	11.9%
Mar	W	10.9 kt	29.4%	7.7 kt	29.5%	9.4%	1.9%	23.7%	27.8%	10.6%	0.01%	10.3%
Apr	W	10.4 kt	24.2%	7.3 kt	27.1%	7.6%	1.2%	24.4%	23.9%	10.4%	0.1%	10.3%
May	E	9.2 kt	16%	6 kt	17.2%	3%	0.2%	27.4%	23.1%	12.9%	0.28%	10.9%
Jun	SW	8.6 kt	13.2%	5.7 kt	13.4%	1.7%	0.1%	30.1%	16%	11%	0.63%	10.9%
Jul	SW	8.2 kt	11.1%	5.2 kt	8.8%	0.6%	0%	35.8%	12.3%	7%	0.79%	7.7%
Aug	SW	8 kt	9.5%	5.4 kt	9.7%	0.9%	0.1%	29.8%	13.6%	5.6%	0.48%	5.7%
Sep	SW	8.4 kt	10.3%	5.3 kt	9.7%	1.1%	0.1%	26.5%	22.9%	7.6%	0.26%	7%
Oct	W	9.2 kt	18.3%	6.1 kt	16.2%	3.3%	0.5%	26.8%	23.4%	9.4%	0.06%	10.4%
Nov	W	9.5 kt	22.8%	6.7 kt	21.7%	6%	0.7%	29.9%	20.4%	7.2%	0.01%	8.7%
Dec	W	9.9 kt	24.7%	7.3 kt	25.9%	8%	1.7%	28.6%	19.5%	11.6%	0%	13%

IFR, thunderstorm (TS) and fog columns are airport-wide shares of hours; the crosswind and tailwind columns are specific to this runway. Prevailing = most common 45° wind sector among wind hours.

Runway 04L/22R closure history

Runway NOTAM history begins when the NOTAM feed goes live (next phase).

D-ATIS broadcasts recorded since Sep 18, 2026 declared runway 04L closed on 0 days and runway 22R closed on 0 days in the last 30 days. Scheduled and unscheduled closure NOTAMs, with start and end times and the official text, will appear here once ATIS Alerts records runway NOTAMs; there is no retrievable archive, so history accrues from that date forward.

Instrument approaches to runway 04L/22R

From the FAA d-TPP, linked to the official plates.

Runway 04L

RNAV (GPS)RNAV (GPS) RWY 04L ↗

Runway 22R

No straight-in instrument approach published to this end.

19 departure procedures · 9 STARs · FAA hot spots page ↗ · LAHSO page ↗ · FAA d-TPP cycle 2610. Plates open on aeronav.faa.gov (public domain); ATIS Alerts does not reproduce charts or minimums.

Methodology and sources

Active runwaysare read from the airport's D-ATIS text (community relay of the FAA broadcast) with an open, tested parser; the broadcast text is always shown. Every change is recorded, so “recorded use” is what the facility stated, never an inference.
Wind components use the current METAR (aviationweather.gov) against TRUE runway headings from the OurAirports/FAA runway record.
Predicted runway scores each open end from the TAF wind (headwind, crosswind penalty, tailwind avoidance, longest-runway tie-break); confidence falls with forecast distance, gusts and TAF age. It does not model noise abatement or flow programs.
Climatology: Iowa Environmental Mesonet ASOS archive, one observation per hour, 45° wind sectors, percentiles via t-digest; runway geometry is today's record applied to all years. Methodology v1.
Approaches: FAA d-TPP metafile, current charting cycle; plates link to aeronav.faa.gov. No minimums are reproduced.
Data freshness: METAR and D-ATIS refresh every minute on this page; the D-ATIS recorder ran 1 min ago; climatology through 2025-12-31.

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Other runways at KBOS

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Tools for this runway

⚠️ ATIS Alerts provides informational runway analysis based on available weather, D-ATIS, FAA data and historical observations. Active runways shown here are read from D-ATIS text and may lag or be misread; predicted runways are an ATIS Alerts estimate, not an ATC assignment. Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.

Runway page score 73/100 · indexed (rollout wave gate).

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Crosswind (kt)	Share of wind hours
0–5	42.9%
5–10	36.5%
10–15	15.1%
15–20	4.5%
20–25	0.8%
25+	0.1%