KMDW Runway 04L/22R — Chicago Midway International Airport
5,507 × 150 ft asphalt · true headings 043° / 223° · field elevation 620 ft
Runway 04L/22R at Chicago Midway International Airport (KMDW) in Chicago, IL is 5,507 ft long and 150 ft wide, asphalt, with true headings 043° and 223°. Over 2005–2025 the wind gave runway 04L the headwind 39.9% of the time and runway 22R 60.1%, with a crosswind above 15 kt in 1.8% of wind hours. KMDW publishes its tower configuration on FAA SWIM, so this page shows the runway the tower is actually using right now, today's configuration changes, and a growing record of how often each end is assigned.
Runway 04L/22R — current operational status
What the D-ATIS, the tower and current NOTAMs state now. The published FAA baseline (NASR) is a separate line in the overview below and does not reflect temporary closures.
- NOTAM 11/030: !MDW 11/030 MDW RWY 04L FICON 5/5/5 100 PCT WET OBS AT 2611031048. 2611031048-2611041048
Sources: Published FAA baseline (OurAirports/NASR record) · FAA NOTAMs · Tower TFDM configuration (FAA SWIM) · D-ATIS · Tower TFDM 1503Z (9:03 AM CST) · D-ATIS 1453Z (8:53 AM CST). Runway NOTAMs stream live from the FAA NOTAM Management Service (SWIM); the official text is shown verbatim below the card. Always confirm with a current briefing.
NOTAMs for runway 04L/22R
Official text as issued; grouped for reading only. “Scheduled” means not yet in effect. NOTAMs are received live from the FAA NOTAM Management Service through SWIM and recorded since Sep 19, 2026; a NOTAM issued before that and not re-issued since may be missing. Get a full briefing before flight.
- 11/030 · DOM11/03 1048Z (4:48 AM CST) → 11/04 1048Z (4:48 AM CST)
!MDW 11/030 MDW RWY 04L FICON 5/5/5 100 PCT WET OBS AT 2611031048. 2611031048-2611041048
- 10/290 · INTL10/23 2126Z (4:26 PM CDT) → 11/06 1200Z (6:00 AM CST)
!MDW 10/290 MDW RWY 04L/22R SAFETY AREA IRREGULAR SFC NW EDGE BTN RWY 13L AND TWY H 2610232126-2611061200
Current active runways at KMDW
As stated by the tower — its TFDM surface system and its D-ATIS broadcast. Not an estimate.
Airport rates: 32 arrivals / 32 departures per hour. In effect since 2026-10-31 1251Z (7:51 AM CDT).
Flow: Southeast flow— the compass direction of the stated arrival ends
Runway 04L/22R in this configuration: not listed for arrivals or departures (tower TFDM)
A bare number (13) means the broadcast did not say which parallel.
This D-ATIS configuration has been stated since 1053Z (4:53 AM CST).
Show the D-ATIS text
MDW ATIS INFO D 1453Z. 20017G30KT 10SM FEW017 BKN075 BKN250 20/16 A2991 (TWO NINER NINER ONE) RMK AO2 PK WND 20031/1405 SLP126 T02000156 58001. RNAV Z RWY 13L APCH IN USE. LNDG AND DEPG RWYS 13. NOTICE TO AIRMEN. RWY 4R, 22L CLSD. TWY K CLSD BTN TWY, Y AND TWY F, TWY Y4 CLSD. Y PAD CLSD. AIRCRAFT SHOULD OPERATE MODE CEE ON ALL TWYS AND RWYS. RWY 4L CONDITION CODES, , 5 , , 5 , , 5 , AT 1050Z, RWY 13R CONDITION CODES, , 5 , , 5 , , 5 , AT 1050Z. HAZD WEA INFO FOR MDW AREA AVBL ON FSS FREQ. RWY 22L EEMASS OTS. READBACK ALL RWY HOLD SHORT INSTRUCTIONS AND ALT ASSIGNMENTS. ...ADVS YOU HAVE INFO D.
Current wind on Runway 04L/22R
Wind from the south-southwest (200°) at 17 kt, gusting 30 kt
- Tailwind
- 16 kt
- Crosswind
- 7 ktfrom right
- Gust crosswind
- 12 kt
- Headwind
- 16 kt
- Crosswind
- 7 ktfrom left
- Gust crosswind
- 12 kt
- arrivals
- departures
- LAHSO hold-short
- closed
Layout from FAA NASR runway-end coordinates; the selected runway is highlighted and the ends the tower TFDM states in use are marked at their own threshold. Not for navigation. Official FAA diagram ↗
Components use TRUE runway headings and TRUE METAR wind. “Favored by wind” is arithmetic, not an ATC assignment.
Today's runway configuration at KMDW
Meaningful configuration changes recorded from the tower's TFDM feed — the facility's own statements, not estimates.
Nov 3, 2026 (airport-local day): 0 configuration changes since local midnight, from the tower's TFDM configuration ATIS Alerts recorded. A change is a different arrival or departure set; a new ATIS letter with the same runways is folded into the row it belongs to. The history section below counts the same way over rolling windows.
- 06:05Z12:05 AM CST(in effect since before the day began)9.0 h · currentArrivals13R13LDepartures13R13LSoutheast flowIn effect at the start of the day
Runway 04L/22R outlook
Where runway 04L/22R stands now and which runway at KMDW is likely over the next 12 hours — an estimate, not an ATC assignment.
Time · runway 04L/22R · airport-wide outlook · confidence · forecast wind · why
- Now1505Z · 9:05 AM CST·04L/22R: not in the stated configuration·Current airport configuration (tower TFDM): arrivals 13R · 13L · departures 13R · 13L·stated·wind 200° at 17 kt G30
- +1 h1605Z · 10:05 AM CST·04L/22R: no runway favored·no runway favored airport-wide·no confidence·wind not forecast·Why No TAF is published for this airport, so there is no forecast wind to score.
- +2 h1705Z · 11:05 AM CST·04L/22R: no runway favored·no runway favored airport-wide·no confidence·wind not forecast·Why No TAF is published for this airport, so there is no forecast wind to score.
- +3 h1805Z · 12:05 PM CST·04L/22R: no runway favored·no runway favored airport-wide·no confidence·wind not forecast·Why No TAF is published for this airport, so there is no forecast wind to score.
- +6 h2105Z · 3:05 PM CST·04L/22R: no runway favored·no runway favored airport-wide·no confidence·wind not forecast·Why No TAF is published for this airport, so there is no forecast wind to score.
- +12 h0305Z · 9:05 PM CST·04L/22R: no runway favored·no runway favored airport-wide·no confidence·wind not forecast·Why No TAF is published for this airport, so there is no forecast wind to score.
ATIS Alerts Predicted Runway is an estimate from the current wind (no TAF is published for this airport), runway geometry (most headwind, crosswind penalised, tailwind over 5 kt avoided, longest runway breaks ties), the current stated configuration and any stated closures; recorded tower use since Sep 17, 2026 (720 h) is an input wherever a wind sector has 24 h on record. Each row lists its reasons; “no runway favored” is a genuine answer under variable or light wind, never replaced by a guess. It is not an ATC assignment and does not know about noise abatement or traffic flow unless the recorded history shows them.
Counts the tower's surface system expects per runway over the next two hours — the tower's plan, not an ATIS Alerts estimate and not an ATC assignment. A runway with zero expected demand is not in the plan for that period. During a runway change the plan can lag the configuration above for a few minutes (flights already assigned to the old runways stay counted there until reassigned).
- APREQ (25 programs) · since 11/03 1307Z · by ZDV — approval request — departures need a release time
- APREQ → KDCA (9 programs) · since 10/07 0131Z · until further notice · by ZDC — approval request — departures need a release time
- APREQ → KMEM (7 programs) · since 11/03 0301Z · until further notice · by ZME — approval request — departures need a release time
- APREQ → KFLL/KOPF (2 programs) · since 10/01 0206Z · until further notice · by ZDC — approval request — departures need a release time
- APREQ → ORD/PWK/UGN · since 07/29 1233Z · until further notice — approval request — departures need a release time
- APREQ → KGRB · since 10/23 0222Z · until further notice · by ZAU — approval request — departures need a release time
- APREQ → KLGA · since 11/03 1134Z · until further notice · by ZAU — approval request — departures need a release time
- APREQ → KDFW · since 11/03 1219Z · until further notice · by ZAU — approval request — departures need a release time
Restrictions on departures from KMDWtoward the named airports or fixes, as recorded by the tower's surface system; they change the departure flow, not the runway in use. Not an FAA product.
Runway 04L/22R equipment and lighting
What the FAA record lists for each end, annotated with current NOTAM and D-ATIS outages.
- Approach lighting
- Not available
- Visual glide slope
- PAPI (4-box, left side)
- Runway edge lighting
- MIRL (medium intensity)
- Centerline lighting
- Not available
- Touchdown zone lighting
- Not available
- REIL
- Not available
- ILS
- Not available
- Localizer
- Not available
- Glideslope
- Not available
- DME
- Not available
- Marker beacons
- Not available
- RVR
- Not available
- Runway markings
- Non-precision instrument
- Arresting system
- Not available
- Approach lighting
- Not available
- Visual glide slope
- PAPI (4-box, left side)
- Runway edge lighting
- MIRL (medium intensity)
- Centerline lighting
- Not available
- Touchdown zone lighting
- Not available
- REIL
- Not available
- ILS
- Not available
- Localizer
- Not available
- Glideslope
- Not available
- DME
- Not available
- Marker beacons
- Not available
- RVR
- Not available
- Runway markings
- Non-precision instrument
- Arresting system
- Not available
Source: FAA NASR 28-day subscription, cycle effective 2026-10-01 (equipment on record) · FAA NOTAMs via SWIM (live)and the current D-ATIS (outages). “Not available” means the FAA record lists no such equipment for the end; nothing here is inferred. An outage annotation is only ever a reading of the official text shown with it. Declared distances are not shown in this phase.
Land and hold short operations
LAHSO hold-short points and available landing distances on the FAA record, and whether the current D-ATIS reports LAHSO in effect.
No LAHSO hold-short point on the FAA record for this end.
No LAHSO hold-short point on the FAA record for this end.
The current D-ATIS does not state LAHSO in effect. Source: FAA NASR cycle 2026-10-01; D-ATIS text read by ATIS Alerts.
Frequencies for runway 04L/22R
Tower, ground, clearance, ATIS and approach frequencies from the FAA record, labelled by what they apply to.
| Service | Frequency | Applies to |
|---|---|---|
| Tower | 135.2 | Airport-wide |
| Tower | 269.125 | Airport-wide |
| Ground | 118.075 | Airport-wide |
| Clearance delivery | 124.625 | Airport-wide |
| D-ATIS | 132.75 | Airport-wide |
Show all frequencies (4 more: approach and departure sectors, secondary and other)
| Service | Frequency | Applies to |
|---|---|---|
| UNICOM | 122.95 | Airport-wide |
| Approach / departure | 126.05 | Airport-wide |
| Approach / departure | 128.2 | Airport-wide |
| Approach / departure | 353.875 | Airport-wide |
The FAA record does not sectorize KMDW's frequencies by runway; every row applies airport-wide. Source: FAA NASR FRQ, cycle 2026-10-01. Verify on the current chart supplement before use.
Runway 04L/22R overview
Physical characteristics from the FAA-derived runway record.
- Length
- 5,507 ft
- Width
- 150 ft
- Surface
- Asphalt · Good condition
- Surface treatment
- Grooved
- Weight bearing (lb)
- S 60k · D 120k
- PCN
- 330
- Runway lights
- Lighted
- Airport elevation
- 620 ft
- Published FAA baseline
- Open
- Published NASR record; does not reflect temporary closures or restrictions. Current operational status is the card at the top of the page.
- True heading
- 043°
- Magnetic
- 047°
- Published FAA baseline
- Open
- Threshold elevation
- 619 ft
- TDZ elevation
- 617 ft
- Displaced threshold
- 758 ft
- Threshold crossing height
- 39 ft
- Visual glide path
- 3°
- Traffic pattern
- Left
- Controlling obstruction
- road, 15 ft, 200 ft from threshold, 0:1 slope
- True heading
- 223°
- Magnetic
- 227°
- Published FAA baseline
- Open
- Threshold elevation
- 605 ft
- TDZ elevation
- 614 ft
- Displaced threshold
- 878 ft
- Threshold crossing height
- 35 ft
- Visual glide path
- 3°
- Traffic pattern
- Left
- Controlling obstruction
- road, 15 ft, 200 ft from threshold, 0:1 slope
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 headings use the FAA's published variation for this airport, 4.0°W (2015), the same value printed on the FAA airport diagram. Surface condition, treatment, weight bearing, thresholds and traffic pattern are from the FAA NASR record (cycle 2026-10-01); lighting, ILS and LAHSO are in their own sections above. Declared distances are not shown in this phase.
Configuration history at KMDW
Observed runway usage: how often the tower's TFDM configuration listed each end, by window, flow, wind and time of day (the tower's own statement, via FAA SWIM).
- 7-day analysis: Ready
- 30-day analysis: Ready
- 90-day analysis: Collecting · 30 / 90 days
- 12-month analysis: Collecting · 30 / 365 days
Runway percentages are measured independently. Multiple runways can be active simultaneously, so totals may exceed 100%.
- Most-used arrival ends at the airport
- 13L (100%) · 13R (100%)
- Most-used departure ends
- 13L (100%) · 13R (100%)
Insufficient history for flow shares: 24 of the 48 hours of stated configuration needed have been recorded.
- Most-used arrival ends at the airport
- 13L (44%) · 13R (44%) · 04L (29%)
- Most-used departure ends
- 13L (44%) · 13R (44%) · 04L (29%)
- Southeast flow44%(74 h)
- Northeast flow29%(49 h)
- Northwest flow27%(46 h)
- 45% · arrivals 13L · 13R · departures 13L · 13R(Southeast flow)
- 28% · arrivals 04L · 04R · departures 04L · 04R(Northeast flow)
- 27% · arrivals 31L · 31R · departures 31L · 31R(Northwest flow)
- Most-used arrival ends at the airport
- 22L (44%) · 22R (44%) · 31L (22%)
- Most-used departure ends
- 22L (44%) · 22R (44%) · 31L (22%)
- Southwest flow44%(318 h)
- Northwest flow22%(160 h)
- Southeast flow18%(126 h)
- Northeast flow16%(116 h)
- 44% · arrivals 22L · 22R · departures 22L · 22R(Southwest flow)
- 22% · arrivals 31L · 31R · departures 31L · 31R(Northwest flow)
- 18% · arrivals 13L · 13R · departures 13L · 13R(Southeast flow)
| Wind from | Hours | 04L arrivals | 22R arrivals | 04L departures | 22R departures |
|---|---|---|---|---|---|
| Calm / light (< 5 kt) | 720 | 16% | 44% | 16% | 44% |
Bars: share of each local hour in which an end of this runway was named for arrivals. Patterns are described, not explained.
Observed runway usage — 720 hours of tower TFDM runway configuration history collected · 4 distinct configurations observed · through Nov 3, 2026. Shares are the fraction of recorded hours in which the tower's TFDM configuration listed each end. Wind sectors use the wind reported when each configuration began. Nothing here is inferred from wind; the wind-favored analysis for KMDW is a separate module. 90-day, 12-month and seasonal views appear once the record is long enough.
Historical wind and crosswind on runway 04L/22R
20-year hourly climatology from the ASOS archive, computed per runway end.
From 175,296 hourly observations at KMDW (2005–2025), 163,419 with a steady wind direction (6.8% calm, variable or direction-less). One observation per clock hour; TRUE headings against TRUE wind.
Crosswind on runway 04L/22R (either end)
| Crosswind (kt) | Share of wind hours |
|---|---|
| 0–5 | 56.1% |
| 5–10 | 32.9% |
| 10–15 | 9.2% |
| 15–20 | 1.6% |
| 20–25 | 0.2% |
| 25+ | 0% |
Strongest-crosswind month on average: Jan; calmest: Aug. Percentiles are streaming approximations (t-digest), accurate to about 0.1 kt.
Runway 04L
Runway 22R
“Most wind-favored end” is meteorological analysis: the share of steady-wind hours (2005–2025) in which this end had the most headwind of every open runway end at KMDW. It does not mean ATC selected the runway that often (parallel ends with the same heading share the credit equally). Observed runway use, where available, is the configuration-history section above.
By wind direction
| Wind from | Share of wind hours | 04L favored | 22R favored | Mean crosswind | Crosswind > 15 kt |
|---|---|---|---|---|---|
| N 338–023° | 10% | 32.7% | 0% | 6 kt | 1.5% |
| NE 023–068° | 10% | 50% | 0% | 1.8 kt | 0% |
| E 068–113° | 12% | 20.9% | 0% | 5.4 kt | 0.3% |
| SE 113–158° | 6% | 0% | 0% | 7.3 kt | 2.9% |
| S 158–203° | 18% | 0% | 36.2% | 5.2 kt | 0.5% |
| SW 203–248° | 16% | 0% | 50% | 1.7 kt | 0% |
| W 248–293° | 18% | 0% | 20% | 6.9 kt | 2.9% |
| NW 293–338° | 11% | 0% | 0% | 8.9 kt | 7.3% |
By time of day (airport-local)
Seasonal runway conditions
| Month | Mean crosswind (kt) |
|---|---|
| Jan | 6.1 kt |
| Feb | 6.1 kt |
| Mar | 5.8 kt |
| Apr | 5.9 kt |
| May | 4.9 kt |
| Jun | 4.5 kt |
| Jul | 4.1 kt |
| Aug | 4.0 kt |
| Sep | 4.5 kt |
| Oct | 5.4 kt |
| Nov | 5.8 kt |
| Dec | 5.8 kt |
| Month | Prevailing | Mean wind | Gusty | Mean xw | xw > 10 | xw > 15 | xw > 20 | 04L tail > 5 | 22R tail > 5 | IFR | TS | Fog |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | W | 9.3 kt | 22.3% | 6.1 kt | 16.6% | 2.2% | 0.2% | 44% | 11% | 16.1% | 0.09% | 17.9% |
| Feb | W | 9.4 kt | 21.2% | 6.1 kt | 16.5% | 3.1% | 0.4% | 36.3% | 17.6% | 11.7% | 0.21% | 14% |
| Mar | S | 9.5 kt | 25.5% | 5.8 kt | 14.8% | 2.3% | 0.2% | 28.9% | 30.8% | 8.4% | 0.52% | 10.6% |
| Apr | E | 9.7 kt | 28.2% | 5.9 kt | 15.2% | 2.9% | 0.3% | 30% | 31.2% | 7% | 0.78% | 8.9% |
| May | S | 8.4 kt | 19.9% | 4.9 kt | 8.6% | 1% | 0% | 27.5% | 32% | 5.9% | 1.2% | 6.8% |
| Jun | SW | 7.9 kt | 17.4% | 4.5 kt | 6.5% | 1% | 0.1% | 32.8% | 24.9% | 4.4% | 1.81% | 5% |
| Jul | SW | 7.2 kt | 12.8% | 4.1 kt | 3.8% | 0.4% | 0.1% | 30.4% | 22.1% | 1.6% | 1.8% | 2.7% |
| Aug | SW | 6.9 kt | 11.8% | 4 kt | 3.5% | 0.3% | 0% | 28.6% | 21.8% | 1.7% | 1.67% | 3.2% |
| Sep | S | 7.3 kt | 13.1% | 4.5 kt | 5.9% | 0.8% | 0.1% | 26.2% | 23.7% | 2.7% | 0.72% | 4.4% |
| Oct | S | 8.4 kt | 21.2% | 5.4 kt | 11% | 1.9% | 0.2% | 35.4% | 16.8% | 5.3% | 0.51% | 6.7% |
| Nov | S | 8.9 kt | 24.1% | 5.8 kt | 14.6% | 2.9% | 0.4% | 42% | 11.4% | 5.8% | 0.14% | 8.4% |
| Dec | W | 8.9 kt | 20.9% | 5.8 kt | 13.6% | 2.3% | 0.3% | 43.7% | 10% | 14.4% | 0.08% | 16.7% |
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
Kept per source with its provenance: D-ATIS-observed, NOTAM-observed and the FAA published baseline are never merged.
- 04L reported closed on 30 calendar days (300 broadcasts; first seen 2026-10-05 02:55Z, last seen 2026-11-03 10:50Z)
- 22R reported closed on 30 calendar days (300 broadcasts; first seen 2026-10-05 02:55Z, last seen 2026-11-03 10:50Z)
Normalised status: closed on those days as stated in the broadcast text (shown verbatim in the live band above). History is incomplete until 30 days of coverage exist.
- 11/019 · closure (full) · runway 04L/22Reffective 2026-11-03 04:00Z → 2026-11-03 12:00Z · first seen 2026-11-02 20:36Z · last seen 2026-11-03 10:48Z · cancelled 2026-11-03 10:48Z
!MDW 11/019 MDW RWY 04L/22R CLSD 2611030400-2611031200
- 11/018 · closure (full) · runway 04L/22Reffective 2026-11-03 02:00Z → 2026-11-03 10:00Z · first seen 2026-11-02 20:37Z · last seen 2026-11-03 03:02Z · cancelled 2026-11-03 03:02Z
!MDW 11/018 MDW RWY 04L/22R CLSD 2611030200-2611031000
- 11/013 · partial closure (partial) · runway 04L/22Reffective 2026-11-02 04:00Z → 2026-11-02 12:00Z · first seen 2026-11-01 21:47Z · last seen 2026-11-02 10:44Z · cancelled 2026-11-02 10:44Z
!MDW 11/013 MDW RWY 04L/22R CLSD EXC TAX 2611020400-2611021200
- 10/393 · partial closure (partial) · runway 04L/22Reffective 2026-11-01 02:00Z → 2026-11-01 12:00Z · first seen 2026-10-31 19:39Z · last seen 2026-11-01 10:52Z · cancelled 2026-11-01 10:52Z
!MDW 10/393 MDW RWY 04L/22R CLSD EXC TAX 2611010200-2611011200
- 10/393 · partial closure (partial) · runway 04L/22Reffective 2026-11-01 02:00Z → 2026-11-01 12:00Z · first seen 2026-11-01 10:53Z · last seen 2026-11-01 10:53Z
RWY 04L/22R CLSD EXC TAX
- 10/383 · partial closure (partial) · runway 04L/22Reffective 2026-10-31 03:00Z → 2026-10-31 11:00Z · first seen 2026-10-30 19:53Z · last seen 2026-10-31 09:49Z · cancelled 2026-10-31 09:49Z
!MDW 10/383 MDW RWY 04L/22R CLSD EXC TAX 2610310300-2610311100
- 10/377 · partial closure (partial) · runway 04L/22Reffective 2026-10-30 04:37Z → 2026-10-30 11:00Z · first seen 2026-10-30 08:18Z · last seen 2026-10-30 08:18Z
TWY P BTN RWY 04L/22R AND TWY Y CLSD
- 10/373 · partial closure (partial) · runway 04L/22Reffective 2026-10-30 03:00Z → 2026-10-30 11:00Z · first seen 2026-10-30 10:05Z · last seen 2026-10-30 10:05Z
!MDW 10/373 MDW RWY 04L/22R CLSD EXC TAX 2610300300-2610301100
- 10/373 · partial closure (partial) · runway 04L/22Reffective 2026-10-30 03:00Z → 2026-10-30 11:00Z · first seen 2026-10-29 23:38Z · last seen 2026-10-30 10:05Z · cancelled 2026-10-30 10:05Z
!MDW 10/373 MDW RWY 04L/22R CLSD EXC TAX 2610300300-2610301100
- 10/358 · partial closure (partial) · runway 04L/22Reffective 2026-10-29 03:00Z → 2026-10-29 11:00Z · first seen 2026-10-28 19:37Z · last seen 2026-10-29 10:05Z · cancelled 2026-10-29 10:05Z
!MDW 10/358 MDW RWY 04L/22R CLSD EXC TAX 2610290300-2610291100
- 10/358 · partial closure (partial) · runway 04L/22Reffective 2026-10-29 03:00Z → 2026-10-29 11:00Z · first seen 2026-10-29 10:06Z · last seen 2026-10-29 10:06Z
RWY 04L/22R CLSD EXC TAX
- 10/355 · closure (full) · runway 04L/22Reffective 2026-10-28 08:57Z → 2026-10-28 11:00Z · first seen 2026-10-28 08:59Z · last seen 2026-10-28 10:34Z · cancelled 2026-10-28 10:34Z
!MDW 10/355 MDW RWY 04L/22R CLSD 2610280857-2610281100
Runway 04L/22R: Open on the published record — a baseline that does not reflect temporary closures or restrictions, not the current operational status.
Recent pilot reports involving runway 04L/22R
Official PIREPs that name this runway explicitly, past 6 hours.
No pilot report in the last 6 hours names runway 04L/22R at KMDW explicitly. Reports near the airport that do not name a runway are on the airport page.
Instrument approaches to runway 04L/22R
From the FAA d-TPP, linked to the official plates.
Runway 04L
No straight-in instrument approach published to this end.
Runway 22R
- RNAV (GPS)RNAV (GPS) RWY 22R ↗
1 departure procedure · 5 STARs · FAA hot spots page ↗ · FAA d-TPP cycle 2611. Plates open on aeronav.faa.gov (public domain); ATIS Alerts does not reproduce charts or minimums.
Methodology and sources
Short version below; the full write-up is at Runway Intelligence methodology, and every launched airport is listed on the Runway Intelligence hub.
- Active runwayscome first from the tower's TFDM (Terminal Flight Data Manager) airport configuration, received as structured data through the FAA SWIM Cloud Distribution Service at towers that have it (KMDW does); otherwise from the airport's D-ATIS text (community relay of the FAA broadcast) with an open, tested parser, and the broadcast text is always shown. Every change is recorded, so “recorded use” is what the facility stated, never an inference. ATIS Alerts is not an FAA product and this is not FAA data; SWIM content is for non-operational use.
- Flowis the compass direction of the stated arrival ends (eight sectors, named only when every arrival end points within 30° of the others and clear of a sector edge); a tower's own configuration name is used when it carries a direction word. Stored separately from the runway sets.
- Equipment, LAHSO and frequencies come from the FAA NASR 28-day subscription (cycle 2026-10-01): approach lights, visual glide slope, edge / centerline / touchdown-zone lights, REIL, ILS components with FAA status, RVR, markings, LAHSO hold-short points and available landing distances, and facility frequencies with their published sectorization. Outage annotations are readings of the NOTAM or D-ATIS text shown beside them. Blank FAA fields read “Not available”.
- Wind components use the current METAR (aviationweather.gov) against TRUE runway headings from the OurAirports/FAA runway record.
- Runway visual range, tower demand and traffic-management restrictions come from FAA SWIM: STDDS Airport Data (RVR and light settings, about 130 airports) and TFDM (15-minute runway demand, APREQ/MIT restrictions). Each block is stamped with its own time; none of it is an FAA product or a clearance.
- Predicted runway scores each open end from the TAF wind (headwind, crosswind penalty, tailwind avoidance, longest-runway tie-break), excludes stated closures, and — once a wind sector has 24 h of recorded use — adjusts confidence by what the facility did under similar wind; every row lists its reasons. It does not model noise abatement or flow programs beyond what the record shows.
- History thresholds: usage shares need 12 / 48 / 168 recorded hours for the 24-hour / 7-day / 30-day windows; a wind sector needs 24 h and 5 days; time-of-day needs 7 days and 20 h per daypart; flow shares need 48 h. Below a bar the module says so instead of showing a percentage.
- 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.
- PIREPs: official reports from aviationweather.gov are attached only when the text names this runway and the report is tied to KMDW by identifier or by position within 15 NM. 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 5 min ago; the tower TFDM feed last delivered 2 min ago; usage rollups every 3 h; climatology through 2025-12-31.
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Other runways at KMDW
Tools for this runway
Active runway - past 30 days
Share of stated hours each end was named for arrivals at KMDW. From the tower TFDM configuration, not wind. Shares are measured independently, so parallels active together can each read 100%.
- 22L44%dep 44%
- 22R44%dep 44%
- 31L22%dep 22%
- 31R22%dep 22%
- 13L18%dep 18%
- 13R18%dep 18%
- 04L16%dep 16%
- 04R16%dep 16%
30.0 days of stated configuration on record · 31 configuration changes · 4 distinct configurations.
KMDW 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 ↗
⚠️ ATIS Alerts provides informational runway analysis based on available weather, the tower's TFDM configuration and NOTAMs received through FAA SWIM, D-ATIS text, FAA data and historical observations. Active runways shown here are what the tower or its D-ATIS stated and may lag or be misread; NOTAM coverage is not complete; predicted runways are an ATIS Alerts estimate, not an ATC assignment; equipment states are readings of the official text shown with them. Not an FAA product. Not for operational use. Always verify with official FAA-approved preflight weather sources before flight.