The U.S. aircraft register, updated daily
Plan a flight · Sun 5:08 pm PDT (00:08 UTC)

Sacramento International to Chicago/Rockford International SMF → RFD

1,490 nautical miles (1,715 statute miles) east on a straight line, true course 071°, about 058° magnetic at the departure end (variation 13E). At 120 knots that is 8 h 19 min at the quickest height in today's winds (39,000 ft, a 59-knot tailwind), arriving about 3:27 am CDT (08:27 UTC), after sunset at the destination. Right now SMF is VFR, wind from the south (170°) at 5 knots; RFD is VFR, wind from the southeast (130°) at 3 knots. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 4 flights in the DOT's last twelve reported months, the route's page.

The return flight

The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words

Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.

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

  • SIGMET W72W: thunderstorms (a convective SIGMET) up to 30,000 ft, moving from the southwest at 20 knots, until 6:55 pm PDT (01:55 UTC). Near the route, 199 nm along the route.
    as issued
    WSUS33 KKCI 112355
    MKCW WST 112355
    CONVECTIVE SIGMET 72W
    VALID UNTIL 0155Z
    NV
    FROM 60SSW BAM-60W ELY-OAL-40WNW OAL-60SSW BAM
    AREA TS MOV FROM 23020KT. TOPS TO FL300.
  • SIGMET W71W: thunderstorms (a convective SIGMET) up to 27,000 ft, moving from the south at 40 knots, until 6:55 pm PDT (01:55 UTC). Over the route from 397 to 507 nm out.
    as issued
    WSUS33 KKCI 112355
    MKCW WST 112355
    CONVECTIVE SIGMET 71W
    VALID UNTIL 0155Z
    WY UT ID
    FROM 40S DBS-40WNW BPI-30WSW MTU-30SSW DTA-30SE TWF-40S DBS
    AREA EMBD TS MOV FROM 20040KT. TOPS TO FL270.
  • SIGMET W70W: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 40 knots, until 6:55 pm PDT (01:55 UTC). Over the route from 606 to 676 nm out.
    as issued
    WSUS33 KKCI 112355
    MKCW WST 112355
    CONVECTIVE SIGMET 70W
    VALID UNTIL 0155Z
    MT WY
    FROM 30SSW MLS-60WNW BFF-40SSE OCS-10S BPI-10S BIL-30SSW MLS
    AREA TS MOV FROM 22040KT. TOPS TO FL320.
  • AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Near the route, 79 nm along the route.
  • AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 169 to 576 nm out.
  • AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 248 to 914 nm out.
  • AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 278 to 725 nm out.
  • AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 417 to 785 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 447 to 715 nm out.
  • AIRMET SIERRA 2E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Near the route, 467 nm along the route.
  • AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 596 to 656 nm out.

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 SMF.

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

  • urgent PC12 at 13,000 ft, 35 nm north, 2:48 pm PDT (21:48 UTC): severe turbulence from 13,000 ft to 14,000 ft, remarks: lots of moderate, moments of severe. 457 nm along the route, 35 nm north of the line.
    as filed, and in English
    SLC UUA /OV OGD280010/TM 2148/FL130/TP PC12/TB SEV 140-130/RM LOTS OF MODERATE, MOMENTS OF SEV
    Report
    an urgent report filed through SLC
    Where
    10 nm west (280°) of OGD
    Time
    21:48 UTC
    Height
    at 13,000 ft
    Aircraft
    PC12
    Turbulence
    severe from 14,000 ft to 13,000 ft
    Remarks
    lots of moderate, moments of severe
  • urgent BCS3 at 5,400 ft, 33 nm south, 4:35 pm PDT (23:35 UTC): remarks: wind shear 10 knots gain 1000 above ground on final. 467 nm along the route, 33 nm south of the line.
    as filed, and in English
    PVU UUA /OV PVU310001/TM 2335/FL054/TP BCS3/RM WIND SHEAR 10 KT GAIN 1000 AGL ON FINAL
    Report
    an urgent report filed through PVU
    Where
    1 nm northwest (310°) of PVU
    Time
    23:35 UTC
    Height
    at 5,400 ft
    Aircraft
    BCS3
    Remarks
    wind shear 10 knots gain 1000 above ground on final
  • B739 at 11,000 ft, 6 nm north, 3:40 pm PDT (22:40 UTC): moderate turbulence, no icing, -4 °C, wind 180° at 40 knots, remarks: during the descent. 447 nm along the route, 6 nm north of the line.
    as filed, and in English
    SLC UA /OV TCH240014/TM 2240/FL110/TP B739/TA M04/WV 180040/TB CONT MOD /IC NEG/RM DURD
    Report
    a routine report filed through SLC
    Where
    14 nm southwest (240°) of TCH
    Time
    22:40 UTC
    Height
    at 11,000 ft
    Aircraft
    B739
    Temperature
    −4 °C
    Wind
    from 180° at 40 knots
    Turbulence
    continuous moderate
    Icing
    none
    Remarks
    during the descent
  • B737 at 12,000 ft, 7 nm northeast, 2:22 pm PDT (21:22 UTC): light turbulence, moderate rime icing, -1 °C, remarks: during the climb from 7,000 ft to 14,500 ft. 447 nm along the route, 7 nm northeast of the line.
    as filed, and in English
    SLC UA /OV TCH240010/TM 2122/FL120/TP B737/TA M01/TB LGT OCNL ,OD TURB/IC MOD RIME/RM DURC 070-145
    Report
    a routine report filed through SLC
    Where
    10 nm southwest (240°) of TCH
    Time
    21:22 UTC
    Height
    at 12,000 ft
    Aircraft
    B737
    Temperature
    −1 °C
    Turbulence
    light occasional, od turbulence
    Icing
    moderate rime
    Remarks
    during the climb from 7,000 ft to 14,500 ft
  • A320 at 6,600 ft, 7 nm northwest, 2:55 pm PDT (21:55 UTC): moderate turbulence, -2 °C, wind 200° at 55 knots, remarks: during the climb from 6,600 ft to 10,000 ft. 457 nm along the route, 7 nm northwest of the line.
    as filed, and in English
    SLC UA /OV TCH250007/TM 2155/FL066/TP A320/SK BASE 066 TOPS UNK/TA -2/WV 20055KT/TB OCNL MOD TURB/RM DURC 066-100
    Report
    a routine report filed through SLC
    Where
    7 nm west (250°) of TCH
    Time
    21:55 UTC
    Height
    at 6,600 ft
    Aircraft
    A320
    Sky
    base 6,600 ft tops unknown
    Temperature
    -2
    Wind
    from 200° at 55 knots
    Turbulence
    occasional moderate turbulence
    Remarks
    during the climb from 6,600 ft to 10,000 ft
  • PA44 at 6,000 ft, 32 nm south, 4:25 pm PDT (23:25 UTC): moderate turbulence, remarks: runway in sight at at 6,400 ft. 467 nm along the route, 32 nm south of the line.
    as filed, and in English
    PVU UA /OV PVU310002/TM 2325/FL060/TP PA44/TB MOD /RM RWY IN SIGHT AT 064
    Report
    a routine report filed through PVU
    Where
    2 nm northwest (310°) of PVU
    Time
    23:25 UTC
    Height
    at 6,000 ft
    Aircraft
    PA44
    Turbulence
    moderate
    Remarks
    runway in sight at at 6,400 ft
  • E75L at 14,500 ft, 26 nm north, 4:05 pm PDT (23:05 UTC): moderate turbulence up to 15,800 ft, heavy rain, remarks: during the climb zlc. 467 nm along the route, 26 nm north of the line.
    as filed, and in English
    OGD UA /OV OGD086008/TM 2305/FL145/TP E75L/WX +RA/TB MOD 158 BLO/RM DURC /ZLC
    Report
    a routine report filed through OGD
    Where
    8 nm east (086°) of OGD
    Time
    23:05 UTC
    Height
    at 14,500 ft
    Aircraft
    E75L
    Weather
    heavy rain
    Turbulence
    moderate at 15,800 ft below
    Remarks
    during the climb zlc
  • E75L at 12,500 ft, 19 nm north, 3:25 pm PDT (22:25 UTC): moderate turbulence. 467 nm along the route, 19 nm north of the line.
    as filed, and in English
    HIF UA /OV HIF103005/TM 2225/FL125/TP E75L/TB MOD /ZLC
    Report
    a routine report filed through HIF
    Where
    5 nm east (103°) of HIF
    Time
    22:25 UTC
    Height
    at 12,500 ft
    Aircraft
    E75L
    Turbulence
    moderate zlc
  • A339 at 16,000 ft, 29 nm north, 4:35 pm PDT (23:35 UTC): moderate chop turbulence up to 16,000 ft, remarks: during the climb zlc. 477 nm along the route, 29 nm north of the line.
    as filed, and in English
    OGD UA /OV OGD063012/TM 2335/FL160/TP A339/TB MOD CHOP 160 BLO/RM DURC /ZLC
    Report
    a routine report filed through OGD
    Where
    12 nm northeast (063°) of OGD
    Time
    23:35 UTC
    Height
    at 16,000 ft
    Aircraft
    A339
    Turbulence
    moderate chop at 16,000 ft below
    Remarks
    during the climb zlc
  • B738 at 37,000 ft, 30 nm north, 2:10 pm PDT (21:10 UTC): moderate chop turbulence, remarks: mtw a 40-knot loss of airspeed zdvwc. 725 nm along the route, 30 nm north of the line.
    as filed, and in English
    LAR UA /OV MBW290020/TM 2110/FL370/TP B738/TB MOD CHOP/RM MTW +/-40KT ZDVWC
    Report
    a routine report filed through LAR
    Where
    20 nm west (290°) of MBW
    Time
    21:10 UTC
    Height
    at 37,000 ft
    Aircraft
    B738
    Turbulence
    moderate chop
    Remarks
    mtw a 40-knot loss of airspeed zdvwc
  • BE9L at 21,000 ft, 45 nm north, 4:22 pm PDT (23:22 UTC): light chop turbulence above 21,000 ft, moderate icing above 21,000 ft, -21 °C, remarks: zdvwc. 765 nm along the route, 45 nm north of the line.
    as filed, and in English
    DGW UA /OV IIP200020/TM 2322/FL210/TP BE9L/SK BASE 200/TA M21/TB OCNL LGT CHOP 210/IC MOD MIX 210/RM ZDVWC
    Report
    a routine report filed through DGW
    Where
    20 nm south (200°) of IIP
    Time
    23:22 UTC
    Height
    at 21,000 ft
    Aircraft
    BE9L
    Sky
    base 20,000 ft
    Temperature
    −21 °C
    Turbulence
    occasional light chop at 21,000 ft
    Icing
    moderate mix at 21,000 ft
    Remarks
    zdvwc
  • PC24 at 11,000 ft, 1 nm north, 2:23 pm PDT (21:23 UTC): light to moderate turbulence from 9,000 ft to 11,000 ft, remarks: during the descent RY35L rno. 89 nm along the route, 1 nm north of the line.
    as filed, and in English
    RNO UA /OV KRNO167020/TM 2123/FL110/TP PC24/TB CONT LGT OCNL MOD 110-090/RM DURD RY35L RNO
    Report
    a routine report filed through RNO
    Where
    20 nm south (167°) of KRNO
    Time
    21:23 UTC
    Height
    at 11,000 ft
    Aircraft
    PC24
    Turbulence
    continuous light occasional moderate from 11,000 ft to 9,000 ft
    Remarks
    during the descent RY35L rno
  • B737 at 27,000 ft, 46 nm south, 3:14 pm PDT (22:14 UTC): remarks: mountain wave a 10-knot loss of airspeed +/-300FT entered by zoa fdcs. 109 nm along the route, 46 nm south of the line.
    as filed, and in English
    RNO UA /OV 3830N11910W/TM 2214/FL270/TP B737/RM MTN WAVE +/-10KTS +/-300FT ENTERED BY ZOA FDCS
    Report
    a routine report filed through RNO
    Where
    3830N11910W
    Time
    22:14 UTC
    Height
    at 27,000 ft
    Aircraft
    B737
    Remarks
    mountain wave a 10-knot loss of airspeed +/-300FT entered by zoa fdcs
  • TOP280ZL , 21 nm south, 3:08 pm PDT (22:08 UTC): a routine report with nothing remarked on. 437 nm along the route, 21 nm south of the line.
    as filed, and in English
    SLC UA /OV SLC207036/TM 2208/FLA21N/TP TOP 280 /ZL
    Report
    a routine report filed through SLC
    Where
    36 nm southwest (207°) of SLC
    Time
    22:08 UTC
    Height
    at A21N
    Aircraft
    TOP 280 /ZL

16 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 UTC · at 120 knots true airspeed

The eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 11 forecast points nearest it (SAC, RNO, BAM, ELY, SLC, RKS, BFF, ONL, OMA, DSM, DBQ). A plus sign is a headwind, a minus sign a tailwind.

HeightAverage windHead- or tailwindTemperatureGround speedTime en routeArrival
5,500 ft210° at 11 kt−6 kt17 °C126 kt11 h 50 min6:58 am CDT (11:58 UTC)
7,500 ft210° at 19 kt−12 kt11 °C132 kt11 h 17 min6:25 am CDT (11:25 UTC)
9,500 ft220° at 24 kt−17 kt7 °C137 kt10 h 53 min6:01 am CDT (11:01 UTC)
11,500 ft220° at 28 kt−22 kt3 °C142 kt10 h 30 min5:38 am CDT (10:38 UTC)
13,500 ft220° at 29 kt−24 kt-1 °C144 kt10 h 21 min5:29 am CDT (10:29 UTC)
15,500 ft220° at 31 kt−25 kt-5 °C145 kt10 h 17 min5:25 am CDT (10:25 UTC)
17,500 ft220° at 32 kt−26 kt-9 °C146 kt10 h 12 min5:20 am CDT (10:20 UTC)
18,000 ft FL180220° at 32 kt−27 kt-10 °C147 kt10 h 08 min5:16 am CDT (10:16 UTC)
24,000 ft FL240230° at 37 kt−32 kt-22 °C152 kt9 h 48 min4:56 am CDT (09:56 UTC)
30,000 ft FL300230° at 45 kt−41 kt-32 °C161 kt9 h 15 min4:23 am CDT (09:23 UTC)
34,000 ft FL340240° at 52 kt−51 kt-38 °C171 kt8 h 43 min3:51 am CDT (08:51 UTC)
39,000 ft FL390250° at 57 kt−59 kt-47 °C179 kt8 h 19 min3:27 am CDT (08:27 UTC)

Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.

The forecast points as issued
PointFrom3,0006,0009,00012,00018,00024,00030,00034,00039,000
SACused from 0 nm out; 27 nm from the line270/5L/V 5°L/V -1°240/11 -5°250/22 -15°270/25 -24°260/31 -27°240/39 -33°240/39 -42°
RNOused from 50 nm out; 29 nm from the line320/7260/13 1°230/21 -7°210/38 -17°220/43 -26°230/54 -29°230/59 -32°230/54 -41°
BAMused from 199 nm out; 49 nm from the line270/8 4°230/27 -4°220/49 -18°210/52 -26°220/77 -29°220/71 -33°220/63 -43°
ELYused from 298 nm out; 55 nm from the line210/20 4°240/21 -1°230/37 -13°200/58 -25°220/73 -27°220/73 -36°220/69 -44°
SLCused from 397 nm out; 39 nm from the line280/8210/39 5°210/52 -1°200/50 -11°200/56 -23°220/61 -28°230/73 -37°230/73 -45°
RKSused from 546 nm out; 37 nm from the line190/43210/65 3°210/57 -9°210/56 -21°210/47 -33°230/63 -37°240/77 -46°
BFFused from 745 nm out; 74 nm from the line120/24180/31 13°210/26 7°230/25 -7°240/41 -20°230/52 -36°250/56 -41°260/57 -45°
ONLused from 944 nm out; 98 nm from the line200/20 17°230/26 14°240/21 7°250/27 -9°260/32 -19°240/44 -34°240/56 -41°250/62 -51°
OMAused from 1143 nm out; 60 nm from the line190/34230/34 19°250/25 12°250/18 6°250/22 -7°250/28 -19°260/34 -32°260/39 -41°280/56 -51°
DSMused from 1242 nm out; 49 nm from the line200/32240/27 17°260/19 10°260/16 5°260/19 -7°240/22 -19°270/20 -32°270/38 -42°290/58 -53°
DBQused from 1341 nm out; 53 nm from the line220/23240/22 16°240/24 10°260/18 5°270/16 -8°290/27 -19°310/42 -35°320/55 -44°300/71 -52°

The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch

AirportWhereConditionsWindVisibilityCeilingElevationReported
SMF Sacramento, CA departure VFR Sky: a few clouds at 25,000 feet from the south (170°) at 5 knots 10+ mi none 26 ft 4:53 pm PDT (23:53 UTC)
TRK Truckee, CA 79 nm out, 15 nm northwest of the line, tower VFR Sky: scattered clouds at 5,500 feet, scattered clouds at 7,000 feet from the south-southwest (200°) at 9 knots, gusting to 21 10+ mi none 5,904 ft 23:50 UTC
TMT Austin, NV 209 nm out, 16 nm south of the line VFR Sky: scattered clouds at 5,000 feet, a broken layer at 7,000 feet, overcast at 9,000 feet Weather: heavy rain from the south-southwest (210°) at 12 knots, gusting to 16 10+ mi 7,000 ft 5,735 ft 23:55 UTC
TVY Tooele, UT 437 nm out, 6 nm southeast of the line IFR Sky: a few clouds at 1,600 feet, a few clouds at 3,300 feet, a broken layer at 5,000 feet Weather: light rain, mist from the east-southeast (110°) at 5 knots 2.5 mi 5,000 ft 4,321 ft 23:55 UTC
SLC Salt Lake City, UT 457 nm out, 5 nm northeast of the line, tower marginal VFR Sky: scattered clouds at 1,400 feet, a broken layer at 1,900 feet, overcast at 5,000 feet Weather: rain, mist from the northwest (320°) at 9 knots 6 mi 1,900 ft 4,230 ft 23:54 UTC
SAA Saratoga, WY 695 nm out, 3 nm southeast of the line VFR Sky: scattered clouds at 7,000 feet, a broken layer at 9,500 feet, a broken layer at 12,000 feet Weather: light rain from the south-southwest (200°) at 12 knots, gusting to 17 10+ mi 9,500 ft 7,014 ft 23:50 UTC
BFF Scottsbluff, NE 845 nm out, 3 nm north of the line VFR from the east-southeast (110°) at 13 knots 10+ mi none 3,967 ft 23:53 UTC
TIF Thedford, NE 984 nm out, 7 nm southwest of the line VFR from the east-northeast (070°) at 4 knots 10+ mi none 2,925 ft 23:55 UTC
SUX Sioux City, IA 1162 nm out, 11 nm north of the line, tower VFR from the south-southwest (210°) at 7 knots 10+ mi none 1,098 ft 23:52 UTC
ALO Waterloo, IA 1341 nm out, 17 nm north of the line, tower VFR from the south (170°) at 8 knots 10+ mi none 873 ft 23:54 UTC
DBQ Dubuque, IA 1421 nm out, 10 nm north of the line, tower VFR from the south-southeast (160°) at 8 knots 10+ mi none 1,076 ft 23:53 UTC
RFD Chicago/Rockford, IL destination VFR Sky: a few clouds at 25,000 feet from the southeast (130°) at 3 knots 10+ mi none 742 ft 6:54 pm CDT (23:54 UTC)

The highest airport on this list sits at 7,014 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At RFD when you get there the forecast at the estimated arrival, 3:27 am CDT (08:27 UTC)

Wind from the south at 5 knots, visibility more than 6 miles, clear skies VFR

The whole forecast for RFD
  • From Sun 7:00 pm CDT (00:00 UTC): wind from the south at 5 knots, visibility more than 6 miles, clear skies
  • From Mon 12:00 pm CDT (17:00 UTC): wind from the south-southwest at 12 knots, gusting to 22, visibility more than 6 miles, scattered clouds at 20,000 feet
  • From Mon 6:00 pm CDT (23:00 UTC): wind from the south-southwest at 12 knots, visibility more than 6 miles, a few clouds at 12,000 feet
The forecast for SMF, the departure
  • From Sun 5:00 pm PDT (00:00 UTC): wind from the south-southwest at 7 knots, visibility more than 6 miles, clear skies
  • From Sun 11:00 pm PDT (06:00 UTC): wind from the south-southeast at 7 knots, visibility more than 6 miles, clear skies
  • From Mon 5:00 am PDT (12:00 UTC): wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet

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

  • 6/6740 SACRAMENTO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 5 nm from the route, at the departure end · air shows/sports · ended 11 October · ZOA
  • 6/3475 BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local 13 nm from the route, at the departure end · security · until 1 November · ZOA

Daylight

Sunset at SMF 6:32 pm PDT (01:32 UTC), at RFD 6:21 pm CDT (23:21 UTC) (civil twilight ends 6:49 pm CDT (23:49 UTC)). At 120 knots the arrival at RFD is before sunrise there (7:05 am CDT (12:05 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.

Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads

Radar now, the Pacific Southwest
Radar now, the Pacific Southwest · loop National Weather Service
Radar now, the southern Rockies
Radar now, the southern Rockies · loop National Weather Service
Radar now, the northern Rockies
Radar now, the northern Rockies · loop National Weather Service
Radar, the whole country
Radar, the whole country · loop National Weather Service
Surface analysis now
Surface analysis now Weather Prediction Center
Forecast chart, 12 hours ahead
Forecast chart, 12 hours ahead Weather Prediction Center
Forecast chart, 24 hours ahead
Forecast chart, 24 hours ahead Weather Prediction Center

Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Sacramento International, Chicago/Rockford International.