Gerald R Ford International to San Francisco International GRR → SFO

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

• SIGMET W18W: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 6:55 am EDT (10:55 UTC). Over the route from 1266 to 1395 nm out.
  as issued

  WSUS33 KKCI 120903 CCA
  MKCW WST 120903 COR
  CONVECTIVE SIGMET 18W
  VALID UNTIL 1055Z
  UT ID NV
  FROM 30E TWF-10W MLD-10SE ILC-50WSW ILC-60NE OAL-30E TWF
  AREA TS MOV FROM 24020KT. TOPS TO FL300.
  ***COR PTS***

• SIGMET W18W: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 6:55 am EDT (10:55 UTC). Over the route from 1276 to 1345 nm out.
  as issued

  WSUS33 KKCI 120855
  MKCW WST 120855
  CONVECTIVE SIGMET 18W
  VALID UNTIL 1055Z
  AZ UT NV
  FROM 20WNW BVL-30N BCE-60SSW BCE-50NNE LAS-60NNW ELY-20WNW BVL
  AREA TS MOV FROM 24020KT. TOPS TO FL300.

• AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist, fog). Near the route, at the departure end.
• AIRMET TANGO 2W: 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 169 to 708 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). Over the route from 588 to 807 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 817 to 1066 nm out.
• AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the route from 837 to 1166 nm out.
• AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the route from 867 to 1006 nm out.
• AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 917 to 1465 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 947 to 977 nm out.
• AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 957 to 1475 nm out.
• AIRMET TANGO 1W: moderate turbulence below 18,000 ft (due to mountain wave) up to 12,000 ft. Over the route from 1046 to 1365 nm out.
• AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 179 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 GRR.

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

• A35K at 32,000 ft, 25 nm north, 4:39 am EDT (08:39 UTC): moderate chop turbulence, remarks: fdcs zoa. At the destination end, 25 nm north of the line.
  as filed, and in English

  OAK UA /OV OAK348024/TM 0839/FL320/TP A35K/TB MOD CHOP/RM FDCS ZOA

  Report

  a routine report filed through OAK

  Where

  24 nm north (348°) of OAK

  Time

  08:39 UTC

  Height

  at 32,000 ft

  Aircraft

  A35K

  Turbulence

  moderate chop

  Remarks

  fdcs zoa

At SFO when you get there the forecast at the estimated arrival, 7:28 pm PDT (02:28 UTC)

Wind from the west at 12 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for SFO

• From Mon 1:00 am PDT (08:00 UTC): wind from the south at 7 knots, visibility more than 6 miles, a few clouds at 2,000 feet
• From Mon 3:00 pm PDT (22:00 UTC): wind from the west at 12 knots, visibility more than 6 miles, clear skies
• From Mon 8:00 pm PDT (03:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies

The forecast for GRR, the departure

• From Mon 2:00 am EDT (06:00 UTC): wind from the south at 3 knots, visibility 4 miles, mist, scattered clouds at 25,000 feet
• At times between Mon 2:00 am EDT (06:00 UTC) and 4:00 am EDT (08:00 UTC): visibility ½ mile, fog
• From Mon 5:00 am EDT (09:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, scattered clouds at 25,000 feet
• From Mon 1:00 pm EDT (17:00 UTC): wind from the southwest at 12 knots, gusting to 20, visibility more than 6 miles, a broken layer at 20,000 feet
• From Mon 6:00 pm EDT (22:00 UTC): wind from the south-southwest at 10 knots, visibility more than 6 miles, scattered clouds at 8,000 feet
• From Mon 10:00 pm EDT (02:00 UTC): wind from the south at 8 knots, visibility 4 miles, light rain showers, mist, scattered clouds at 5,000 feet, overcast at 8,000 feet
• 30% chance between Mon 10:00 pm EDT (02:00 UTC) and 2:00 am EDT (06:00 UTC): visibility 2 miles, light thunderstorms with rain, mist, overcast at 3,500 feet (thunderheads)

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

No temporary flight restriction on or near this route right now.

Daylight

Sunset at GRR 7:04 pm EDT (23:04 UTC), at SFO 6:35 pm PDT (01:35 UTC) (civil twilight ends 7:01 pm PDT (02:01 UTC)). At 120 knots the arrival at SFO is after sunset there (6:36 pm PDT (01:36 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.