Chicago O'Hare International to Oakland San Francisco Bay Airport ORD → OAK

Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of

• SIGMET W15W: thunderstorms (a convective SIGMET) up to 28,000 ft, moving from the southwest at 20 knots, until 2:55 am CDT (07:55 UTC). Over the route from 1223 to 1333 nm out.
  as issued

  WSUS33 KKCI 120555
  MKCW WST 120555
  CONVECTIVE SIGMET 15W
  VALID UNTIL 0755Z
  UT NV
  FROM 60WNW BVL-10NE BVL-80E OAL-40SE OAL-20W OAL-60WNW BVL
  AREA TS MOV FROM 24020KT. TOPS TO FL280.

• AIRMET TANGO 3W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 109 to 686 nm out.
• AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, 517 nm along the route.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the route from 656 to 1074 nm out.
• AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 706 to 1253 nm out.
• AIRMET TANGO 1W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the route from 786 to 965 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 845 to 1353 nm out.
• AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 895 to 945 nm out.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 905 to 1353 nm out.
• AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 99 nm of the route.

A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from ORD.

Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first

• B38M at 21,500 ft, 34 nm south, 11:33 pm CDT (04:33 UTC): light turbulence up to 25,000 ft, remarks: during the descent flati star ZDVWC-13. 806 nm along the route, 34 nm south of the line.
  as filed, and in English

  DEN UA /OV DEN305065/TM 0433/FL215/TP B38M/TB LGT BLO 250/RM DURD FLATI STAR. ZDVWC-13

  Report

  a routine report filed through DEN

  Where

  65 nm northwest (305°) of DEN

  Time

  04:33 UTC

  Height

  at 21,500 ft

  Aircraft

  B38M

  Turbulence

  light below 25,000 ft

  Remarks

  during the descent flati star ZDVWC-13

At OAK when you get there the forecast at the estimated arrival, 2:37 pm PDT (21:37 UTC)

Wind from the west at 8 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for OAK

• From Sun 11:00 pm PDT (06:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 1,500 feet
• From Mon 2:00 am PDT (09:00 UTC): wind from the east-southeast at 5 knots, visibility more than 6 miles, a few clouds at 1,500 feet
• From Mon 11:00 am PDT (18:00 UTC): wind from the west at 8 knots, visibility more than 6 miles, clear skies

The forecast for ORD, the departure

• From Mon 1:00 am CDT (06:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
• From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southwest at 13 knots, gusting to 24, visibility more than 6 miles, a few clouds at 25,000 feet
• From Mon 6:00 pm CDT (23:00 UTC): wind from the southwest at 12 knots, visibility more than 6 miles, a few clouds at 12,000 feet

Temporary flight restrictions on the line or within 25 nm of it

• 6/7231 Santa Clara, CA, Sunday, October 11, 2026 through Monday, October 12, 2026 UTC 22 nm from the route, at the destination end · drones kept away from a public gathering · until 12 October · ZOA

Daylight

Sunset at ORD 6:15 pm CDT (23:15 UTC), at OAK 6:35 pm PDT (01:35 UTC) (civil twilight ends 7:02 pm PDT (02:02 UTC)).

Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.