Unstable approach — SWA3556

SWA3556 (Southwest Airlines) was operating from KSFO to KMDW on 2026-08-21. SkyMeter detected a low approach-stability score at Chicago Midway International Airport (KMDW) on runway 04R at 10:50 UTC. Trace data at the event: 1727 ft AGL, 151 kt GS. Approach stability score: 43/100. Scores below 50 occur on under 10% of approaches at this runway and indicate the v2 scorer flagged the approach as highly anomalous (three or more gates exceeded the runway's P90 envelope simultaneously). METAR at the time reported 3 kt wind, 1 kt crosswind component, 8,047 m visibility. The approach-stability score rates the final approach against stabilized-approach gates (glideslope, lateral deviation, descent rate, and IAS) at defined altitudes. A low score means one or more of those were outside the normal envelope for how the approach was flown. The score is graded by guidance type, so instrument approaches (ILS or an aligned straight-in) are held to the full gate set, while visual and pattern arrivals are surfaced only when the score is clearly low. The score is advisory and observational, a deviation measure, not an assertion of an accident. Detection algorithm and known limitations: see SkyMeter methodology.

• SECURITY6/3475 2026-03-08 09:00Z – 2026-11-01 09:59Z SFC–180 ft

  BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local

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• SECURITY6/5797 2026-04-03 00:01Z – 2026-09-28 23:59Z SFC–400 ft

  SACRAMENTO, CA, Thursday, April 2, 2026 through Monday, September 28, 2026 Local

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• SECURITY6/6491 2026-07-20 07:01Z – 2026-09-16 06:59Z SFC–1,499 ft

  Concord, CA, Monday, July 20, 2026 through Tuesday, September 15, 2026 Local

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• HAZARDS6/1462 2026-08-04 13:00Z – 2026-09-01 04:00Z SFC–15,000 ft

  20NM SW PUEBLO, CO, Tuesday, August 4, 2026 through Tuesday, September 1, 2026 UTC

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• HAZARDS6/2768 2026-08-07 14:00Z – 2026-08-22 04:00Z SFC–12,500 ft

  8NM SW RIFLE, CO, Friday, August 7, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/2913 2026-08-08 14:00Z – 2026-08-22 04:00Z SFC–12,500 ft

  10NM SW RIFLE, CO, Saturday, August 8, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/2914 2026-08-08 14:00Z – 2026-08-22 04:00Z SFC–6,500 ft

  8NM W RIFLE, CO, Saturday, August 8, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3039 2026-08-08 17:30Z – 2026-08-22 04:00Z SFC–11,500 ft

  6NM SW RENO, NV, Saturday, August 8, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3077 2026-08-08 20:15Z – 2026-08-22 05:00Z SFC–11,000 ft

  15NM N KLAMATH FALLS, OR, Saturday, August 8, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3080 2026-08-08 22:15Z – 2026-08-22 04:00Z SFC–13,000 ft

  20NM NE SALT LAKE CITY, UT, Saturday, August 8, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3100 2026-08-09 02:44Z – 2026-08-22 04:00Z SFC–6,000 ft

  7NM E GRASS VALLEY, CA, Sunday, August 9, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/3097 2026-08-09 13:00Z – 2026-08-23 04:00Z SFC–13,000 ft

  20NM NE SALT LAKE CITY, UT, Sunday, August 9, 2026 through Sunday, August 23, 2026 UTC

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• HAZARDS6/3101 2026-08-09 13:00Z – 2026-08-24 03:00Z SFC–15,000 ft

  24NM SW PUEBLO, CO, Sunday, August 9, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3128 2026-08-09 14:45Z – 2026-08-23 04:00Z SFC–11,000 ft

  15NM NW RENO, NV, Sunday, August 9, 2026 through Sunday, August 23, 2026 UTC

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• HAZARDS6/3159 2026-08-10 04:00Z – 2026-08-24 04:00Z SFC–11,500 ft

  6NM SW RENO, NV, Monday, August 10, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3162 2026-08-10 04:00Z – 2026-08-24 04:00Z SFC–9,500 ft

  15NM NW RENO, NV, Monday, August 10, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3165 2026-08-10 05:30Z – 2026-08-25 04:00Z SFC–11,000 ft

  15NM N KLAMATH FALLS, OR, Monday, August 10, 2026 through Tuesday, August 25, 2026 UTC

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• HAZARDS6/3167 2026-08-10 05:30Z – 2026-08-24 05:00Z SFC–10,000 ft

  104NM SE BURNS, OR, Monday, August 10, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3606 2026-08-10 21:45Z – 2026-08-24 04:00Z SFC–9,500 ft

  22NM NE RENO, NV, Monday, August 10, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3679 2026-08-11 12:00Z – 2026-08-25 08:00Z SFC–16,500 ft

  1NM NE OURAY, CO, Tuesday, August 11, 2026 through Tuesday, August 25, 2026 UTC

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• HAZARDS6/3659 2026-08-11 13:00Z – 2026-08-24 03:00Z SFC–14,000 ft

  26NM SW PRICE, UT, Tuesday, August 11, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/3717 2026-08-11 14:58Z – 2026-08-24 04:00Z SFC–9,500 ft

  15NM NW RENO, NV, Tuesday, August 11, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/4085 2026-08-12 04:00Z – 2026-08-25 04:00Z SFC–13,000 ft

  4NM W RICHFIELD, UT, Wednesday, August 12, 2026 through Tuesday, August 25, 2026 UTC

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• HAZARDS6/4104 2026-08-12 04:00Z – 2026-08-25 04:00Z SFC–11,000 ft

  15NM NW RENO, NV, Wednesday, August 12, 2026 through Tuesday, August 25, 2026 UTC

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• HAZARDS6/4111 2026-08-12 05:00Z – 2026-08-27 05:00Z SFC–10,000 ft

  104NM SE BURNS, OR, Wednesday, August 12, 2026 through Thursday, August 27, 2026 UTC

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• HAZARDS6/4089 2026-08-12 12:00Z – 2026-08-27 03:30Z SFC–15,000 ft

  2NM SE LANDER, WY, Wednesday, August 12, 2026 through Thursday, August 27, 2026 UTC

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• HAZARDS6/4110 2026-08-12 14:00Z – 2026-08-26 03:00Z SFC–12,500 ft

  12NM SE DRESSLERVILLE, NV, Wednesday, August 12, 2026 through Wednesday, August 26, 2026 UTC

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• UAS PUBLIC GATHERING6/2574 2026-08-13 12:00Z – 2026-08-24 05:00Z SFC–400 ft

  des moines, IA, Thursday, August 13, 2026 through Monday, August 24, 2026 UTC

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• HAZARDS6/5053 2026-08-14 02:15Z – 2026-08-29 04:00Z SFC–11,000 ft

  15NM N KLAMATH FALLS, OR, Friday, August 14, 2026 through Saturday, August 29, 2026 UTC

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• HAZARDS6/5067 2026-08-14 02:15Z – 2026-08-27 04:00Z SFC–11,000 ft

  15NM NW RENO, NV, Friday, August 14, 2026 through Thursday, August 27, 2026 UTC

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• HAZARDS6/5242 2026-08-15 23:15Z – 2026-08-29 04:00Z SFC–9,500 ft

  15NM NW RENO, NV, Saturday, August 15, 2026 through Saturday, August 29, 2026 UTC

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• HAZARDS6/5246 2026-08-16 02:15Z – 2026-08-30 04:00Z SFC–13,000 ft

  37NM SE SOUTH LAKE TAHOE, CA, Sunday, August 16, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5250 2026-08-16 13:00Z – 2026-08-30 04:00Z SFC–11,000 ft

  52NM NE FALLON, NV, Sunday, August 16, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5252 2026-08-16 13:00Z – 2026-08-30 04:00Z SFC–13,000 ft

  37NM SE SOUTH LAKE TAHOE, CA, Sunday, August 16, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5423 2026-08-16 19:15Z – 2026-08-30 04:00Z SFC–11,000 ft

  52NM NE FALLON, NV, Sunday, August 16, 2026 through Sunday, August 30, 2026 UTC

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• SECURITY6/3628 2026-08-17 12:00Z – 2026-08-23 23:59Z SFC–400 ft

  SAINT LOUIS, MO, Monday, August 17, 2026 through Sunday, August 23, 2026 Local

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• HAZARDS6/5463 2026-08-17 13:00Z – 2026-08-30 04:00Z SFC–13,000 ft

  20NM NE SALT LAKE CITY, UT, Monday, August 17, 2026 through Sunday, August 30, 2026 UTC

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• HAZARDS6/5937 2026-08-18 13:00Z – 2026-08-31 03:00Z SFC–13,000 ft

  4NM W RICHFIELD, UT, Tuesday, August 18, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/5897 2026-08-18 14:00Z – 2026-08-31 02:00Z SFC–7,500 ft

  15NM NW RENO, NV, Tuesday, August 18, 2026 through Monday, August 31, 2026 UTC

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• HAZARDS6/6067 2026-08-18 18:15Z – 2026-09-01 02:00Z SFC–11,000 ft

  52NM NE FALLON, NV, Tuesday, August 18, 2026 through Tuesday, September 1, 2026 UTC

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• HAZARDS6/6712 2026-08-20 00:53Z – 2026-08-22 04:00Z SFC–14,500 ft

  8NM N ASPEN, CO, Thursday, August 20, 2026 through Saturday, August 22, 2026 UTC

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• HAZARDS6/6728 2026-08-20 13:00Z – 2026-08-27 03:00Z SFC–14,500 ft

  8NM N ASPEN, CO, Thursday, August 20, 2026 through Thursday, August 27, 2026 UTC

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• HAZARDS6/6958 2026-08-21 04:00Z – 2026-09-03 04:00Z SFC–11,000 ft

  15NM N KLAMATH FALLS, OR, Friday, August 21, 2026 through Thursday, September 3, 2026 UTC

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SkyMeter cross-referenced this flight against FAA-published TFRs that were active during its window and within its geographic bounding box. Overlap doesn't necessarily mean violation — the aircraft may have been outside the TFR’s precise polygon or flying under air-traffic-control coordination.

Automated analysis. Events shown on this page (such as go-around, unstable approach, or runway events) are heuristic classifications produced by algorithms from publicly broadcast ADS-B data. They are intended to surface flights of interest for further review — they are not findings of fact, and they do not determine pilot fault, regulatory compliance, or the cause of any occurrence. Coverage gaps and sensor noise can affect accuracy. Only the relevant civil aviation authority or accident investigation body can make official determinations. How we detect events · Dispute or correct this data