Plan a flight · Sun 9:46 pm EDT (01:46 UTC)

Charlotte/Douglas International to Sacramento International CLT → SMF

1,945 nautical miles (2,238 statute miles) west on a straight line, true course 288°, about 295° magnetic at the departure end (variation 7W). At 120 knots that is 17 h 41 min at the quickest height in today's winds (4,500 ft, a 10-knot headwind), arriving about 12:27 pm PDT (19:27 UTC). Right now CLT is VFR, wind from the southwest (220°) at 9 knots; SMF is VFR, wind from the south (190°) at 9 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: 846 flights in the DOT's last twelve reported months, the route's page.

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 1W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 10:55 pm EDT (02:55 UTC). Over the route from 1207 to 1367 nm out.

as issued

WSUS33 KKCI 120055
MKCW WST 120055
CONVECTIVE SIGMET 1W
VALID UNTIL 0255Z
CO NM WY AZ UT
FROM 40NNW CHE-40WNW TBE-60WNW CME-40N SJN-40ESE MTU-40NNW CHE
AREA SEV TS MOV FROM 23040KT. TOPS TO FL340.
WIND GUSTS TO 60KT POSS.

SIGMET 5W: thunderstorms (a convective SIGMET) up to 33,000 ft, moving from the southwest at 20 knots, until 10:55 pm EDT (02:55 UTC). Over the route from 1666 to 1766 nm out.
as issued
```
WSUS33 KKCI 120055
MKCW WST 120055
CONVECTIVE SIGMET 5W
VALID UNTIL 0255Z
NV
FROM 10NNE BAM-40WSW BVL-60SW ELY-10SE OAL-30WNW OAL-10NNE BAM
AREA TS MOV FROM 23020KT. TOPS TO FL330.
```
AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 8,000 ft. Over the first 120 nm of the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 70 to 209 nm out.
AIRMET SIERRA 3E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the route from 170 to 219 nm out.
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 708 to 1057 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 1087 to 1696 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 1107 to 1785 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 1187 to 1396 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1197 to 1267 nm out.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 1347 to 1805 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1357 to 1736 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). Over the route from 1396 to 1526 nm out.
AIRMET TANGO 3W: moderate turbulence below 18,000 ft (due to mountain wave) up to 15,000 ft. Over the route from 1716 to 1785 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 30 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 CLT.

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

C650 at 40,000 ft, 20 nm north, 7:48 pm EDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 1257 nm along the route, 20 nm north of the line.
as filed, and in English
```
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
```
Report
a routine report filed through ASE
Where
over DBL
Time
23:48 UTC
Height
at 40,000 ft
Aircraft
C650
Turbulence
moderate
Remarks
ZDVWC-03
C680A at 16,000 ft, 7 nm north, 6:59 pm EDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 1257 nm along the route, 7 nm north of the line.
as filed, and in English
```
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
```
Report
a routine report filed through ASE
Where
haeri
Time
22:59 UTC
Height
at 16,000 ft
Aircraft
C680A
Sky
scattered clouds from 16,000 ft
Turbulence
continuous moderate
Remarks
during the descent
E170 at 10,000 ft, 11 nm south, 7:41 pm EDT (23:41 UTC): moderate turbulence up to 10,000 ft, remarks: during the climb. 1327 nm along the route, 11 nm south of the line.
as filed, and in English
```
GJT UA /OV GJT144009/TM 2341/FL100/TP E170/TB MOD SFC-100/RM DURC
```
Report
a routine report filed through GJT
Where
9 nm southeast (144°) of GJT
Time
23:41 UTC
Height
at 10,000 ft
Aircraft
E170
Turbulence
moderate from the surface to 10,000 ft
Remarks
during the climb
S22T at 14,000 ft, 40 nm north, 9:23 pm EDT (01:23 UTC): moderate rime icing, -16 °C. 1436 nm along the route, 40 nm north of the line.
as filed, and in English
```
PUC UA /OV PUC360015/TM 0123/FL140/TP S22T/TA M16/IC MOD RIME /ZLC
```
Report
a routine report filed through PUC
Where
15 nm north (360°) of PUC
Time
01:23 UTC
Height
at 14,000 ft
Aircraft
S22T
Temperature
−16 °C
Icing
moderate rime zlc
E75L at 22,000 ft, 43 nm north, 9:04 pm EDT (01:04 UTC): moderate turbulence. 1446 nm along the route, 43 nm north of the line.
as filed, and in English
```
PUC UA /OV PUC320020/TM 0104/FL220/TP E75L/TB MOD /ZLC
```
Report
a routine report filed through PUC
Where
20 nm northwest (320°) of PUC
Time
01:04 UTC
Height
at 22,000 ft
Aircraft
E75L
Turbulence
moderate zlc
T206 at 9,000 ft, 48 nm south, 6:47 pm EDT (22:47 UTC): remarks: ZME60. 219 nm along the route, 48 nm south of the line.
as filed, and in English
```
CHA UA /OV CHA340032/TM 2247/FL090/TP T206/SK TOP070/RM ZME60
```
Report
a routine report filed through CHA
Where
32 nm north (340°) of CHA
Time
22:47 UTC
Height
at 9,000 ft
Aircraft
T206
Sky
TOP070
Remarks
ZME60
A319 at 25,000 ft, 35 nm north, 7:14 pm EDT (23:14 UTC): no turbulence. 269 nm along the route, 35 nm north of the line.
as filed, and in English
```
IND UA /OV BWG070017/TM 2314/FL250/TP A319/TB NEG
```
Report
a routine report filed through IND
Where
17 nm east (070°) of BWG
Time
23:14 UTC
Height
at 25,000 ft
Aircraft
A319
Turbulence
none
A319 at 32,000 ft, 18 nm south, 6:56 pm EDT (22:56 UTC): light to moderate chop turbulence, remarks: ZME62. 299 nm along the route, 18 nm south of the line.
as filed, and in English
```
BNA UA /OV BNA315020/TM 2256/FL320/TP A319/TB CONS LGT OCNL MOD CHOP/RM ZME62
```
Report
a routine report filed through BNA
Where
20 nm northwest (315°) of BNA
Time
22:56 UTC
Height
at 32,000 ft
Aircraft
A319
Turbulence
continuous light occasional moderate chop
Remarks
ZME62
B77W at 31,000 ft, 13 nm south, 7:27 pm EDT (23:27 UTC): light to moderate chop turbulence, remarks: zme. 309 nm along the route, 13 nm south of the line.
as filed, and in English
```
BNA UA /OV BNA315030/TM 2327/FL310/TP B77W/TB CONS LGT OCNL MOD CHOP/RM ZME
```
Report
a routine report filed through BNA
Where
30 nm northwest (315°) of BNA
Time
23:27 UTC
Height
at 31,000 ft
Aircraft
B77W
Turbulence
continuous light occasional moderate chop
Remarks
zme
B738 at 34,000 ft, 9 nm south, 7:41 pm EDT (23:41 UTC): light to moderate chop turbulence, remarks: zme. 329 nm along the route, 9 nm south of the line.
as filed, and in English
```
CKV UA /OV CKV/TM 2341/FL340/TP B738/TB CONS LGT OCNL MOD CHOP/RM ZME
```
Report
a routine report filed through CKV
Where
over CKV
Time
23:41 UTC
Height
at 34,000 ft
Aircraft
B738
Turbulence
continuous light occasional moderate chop
Remarks
zme
B737 at 31,000 ft, 12 nm north, 8:13 pm EDT (00:13 UTC): light chop turbulence, remarks: ZME25. 399 nm along the route, 12 nm north of the line.
as filed, and in English
```
PAH UA /OV CNG360015/TM 0013/FL310/TP B737/TB OCNL LGT CHOP/RM ZME25
```
Report
a routine report filed through PAH
Where
15 nm north (360°) of CNG
Time
00:13 UTC
Height
at 31,000 ft
Aircraft
B737
Turbulence
occasional light chop
Remarks
ZME25
A21N at 31,000 ft, 42 nm south, 8:24 pm EDT (00:24 UTC): remarks: mountain wave +/-10-20KT ZDVWC-29. 1137 nm along the route, 42 nm south of the line.
as filed, and in English
```
PUB UA /OV PUB/TM 0024/FL310/TP A21N/RM MTN WAVE +/-10-20KT ZDVWC-29
```
Report
a routine report filed through PUB
Where
over PUB
Time
00:24 UTC
Height
at 31,000 ft
Aircraft
A21N
Remarks
mountain wave +/-10-20KT ZDVWC-29
B737 descending, 48 nm north, 9:23 pm EDT (01:23 UTC): no turbulence up to 10,000 ft. 1157 nm along the route, 48 nm north of the line.
as filed, and in English
```
DEN UA /OV DEN/TM 0123/FLDURD/TP B737/TB NEG BLO 100
```
Report
a routine report filed through DEN
Where
over DEN
Time
01:23 UTC
Height
during the descent
Aircraft
B737
Turbulence
no below 10,000 ft
GLF6 at 40,000 ft, 8 nm northwest, 8:48 pm EDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. 1157 nm along the route, 8 nm northwest of the line.
as filed, and in English
```
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
```
Report
a routine report filed through COS
Where
20 nm north (340°) of COS
Time
00:48 UTC
Height
at 40,000 ft
Aircraft
GLF6
Turbulence
light to moderate chop
Remarks
ZDVWC-46

14 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 westbound cruising heights for this course (VFR: even thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 18 forecast points nearest it (GSP, TYS, BNA, CGI, COU, SGF, MKC, ICT, SLN, GCK, GLD, PUB, DEN, GJT, BCE, ELY, RNO, SAC). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
4,500 ft	230° at 14 kt	+10 kt	21 °C	110 kt	17 h 41 min	12:27 pm PDT (19:27 UTC)
6,500 ft	250° at 14 kt	+13 kt	15 °C	107 kt	18 h 11 min	12:57 pm PDT (19:57 UTC)
8,500 ft	240° at 18 kt	+16 kt	11 °C	104 kt	18 h 42 min	1:28 pm PDT (20:28 UTC)
10,500 ft	250° at 21 kt	+19 kt	6 °C	101 kt	19 h 15 min	2:01 pm PDT (21:01 UTC)
12,500 ft	250° at 22 kt	+22 kt	3 °C	98 kt	19 h 51 min	2:37 pm PDT (21:37 UTC)
14,500 ft	250° at 24 kt	+23 kt	-2 °C	97 kt	20 h 03 min	2:49 pm PDT (21:49 UTC)
16,500 ft	250° at 26 kt	+25 kt	-6 °C	95 kt	20 h 28 min	3:14 pm PDT (22:14 UTC)
18,000 ft FL180	250° at 28 kt	+26 kt	-9 °C	94 kt	20 h 41 min	3:27 pm PDT (22:27 UTC)
24,000 ft FL240	240° at 30 kt	+27 kt	-20 °C	93 kt	20 h 55 min	3:41 pm PDT (22:41 UTC)
30,000 ft FL300	250° at 43 kt	+41 kt	-30 °C	79 kt	24 h 37 min	7:23 pm PDT (02:23 UTC)
34,000 ft FL340	250° at 46 kt	+44 kt	-38 °C	76 kt	25 h 36 min	8:22 pm PDT (03:22 UTC)
39,000 ft FL390	250° at 46 kt	+45 kt	-47 °C	75 kt	25 h 56 min	8:42 pm PDT (03:42 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

Point	From	3,000	6,000	9,000	12,000	18,000	24,000	30,000	34,000	39,000
GSP	used from 0 nm out; 47 nm from the line	300/22	310/22 11°	300/22 7°	290/28 5°	270/36 -5°	250/42 -18°	230/54 -31°	230/59 -40°	230/65 -50°
TYS	used from 100 nm out; 30 nm from the line	290/19	310/22 11°	330/25 7°	330/34 3°	320/37 -7°	300/37 -18°	300/37 -34°	280/29 -39°	270/29 -48°
BNA	used from 199 nm out; 65 nm from the line	280/13	340/34 16°	330/38 10°	330/44 5°	330/39 -8°	330/38 -19°	320/49 -34°	330/53 -40°	330/35 -47°
CGI	used from 349 nm out; 60 nm from the line	250/10	290/12 17°	290/18 11°	300/22 5°	320/25 -8°	330/30 -18°	320/53 -33°	320/66 -42°	320/56 -50°
COU	used from 499 nm out; 87 nm from the line	210/16	220/19 15°	240/33 10°	250/29 7°	280/21 -6°	280/19 -18°	300/34 -31°	300/40 -42°	300/60 -52°
SGF	used from 549 nm out; 53 nm from the line	210/21	210/21 16°	240/28 12°	260/24 7°	280/21 -6°	280/26 -18°	290/38 -31°	290/37 -41°	300/49 -52°
MKC	used from 648 nm out; 67 nm from the line	200/28	220/30 16°	270/20 11°	280/22 7°	260/27 -6°	270/27 -18°	280/38 -32°	270/38 -40°	280/50 -52°
ICT	used from 748 nm out; 56 nm from the line	190/34	210/34 18°	240/28 13°	260/23 7°	250/23 -6°	240/29 -17°	260/40 -30°	260/47 -40°	270/42 -51°
SLN	used from 798 nm out; 23 nm from the line	190/37	220/39 20°	240/31 14°	250/24 7°	260/25 -7°	250/26 -17°	250/44 -31°	260/47 -40°	260/47 -50°
GCK	used from 898 nm out; 63 nm from the line		200/35 21°	220/34 14°	240/30 8°	240/27 -6°	240/31 -17°	240/53 -30°	250/55 -39°	250/60 -50°
GLD	used from 997 nm out; 34 nm from the line		190/29	200/30 15°	240/23 8°	250/39 -7°	230/39 -19°	230/57 -31°	240/67 -39°	250/62 -49°
PUB	used from 1097 nm out; 48 nm from the line			210/24 16°	210/28 8°	230/43 -8°	240/42 -21°	240/77 -30°	240/72 -36°	250/51 -47°
DEN	used from 1197 nm out; 81 nm from the line			190/31 16°	210/32 7°	240/41 -8°	230/47 -21°	240/56 -32°	250/65 -37°	250/61 -47°
GJT	used from 1247 nm out; 63 nm from the line			210/40 11°	210/46 3°	210/61 -10°	210/68 -22°	220/57 -29°	230/59 -36°	240/66 -46°
BCE	used from 1446 nm out; 94 nm from the line				210/47 0°	200/50 -12°	220/31 -23°	220/56 -26°	220/58 -35°	230/58 -45°
ELY	used from 1546 nm out; 58 nm from the line			210/20 4°	240/21 -1°	230/37 -13°	200/58 -25°	220/73 -27°	220/73 -36°	220/69 -44°
RNO	used from 1746 nm out; 93 nm from the line		320/7	260/13 1°	230/21 -7°	210/38 -17°	220/43 -26°	230/54 -29°	230/59 -32°	230/54 -41°
SAC	used from 1895 nm out; 24 nm from the line	270/5	L/V 5°	L/V -1°	240/11 -5°	250/22 -15°	270/25 -24°	260/31 -27°	240/39 -33°	240/39 -42°

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

Airport	Where	Conditions	Wind	Visibility	Ceiling	Elevation	Reported
CLT Charlotte, NC	departure	VFR Sky: a few clouds at 3,700 feet, a few clouds at 6,000 feet	from the southwest (220°) at 9 knots	10+ mi	none	747 ft	8:52 pm EDT (00:52 UTC)
AVL Asheville, NC	80 nm out, 11 nm south of the line, tower	VFR	from the north-northwest (330°) at 5 knots	10+ mi	none	2,163 ft	00:54 UTC
HVC Hopkinsville, KY	329 nm out, 5 nm north of the line	VFR	calm	10+ mi	none	563 ft	01:35 UTC
PAH Paducah, KY	399 nm out, 4 nm east of the line, tower	VFR	calm	10+ mi	none	410 ft	00:00 UTC
EMP Emporia, KS	758 nm out, 6 nm northeast of the line	VFR	from the south (190°) at 12 knots	10+ mi	none	1,207 ft	00:53 UTC
SLN Salina, KS	828 nm out, 22 nm north of the line, tower	VFR	from the south (170°) at 13 knots	10+ mi	none	1,288 ft	00:53 UTC
COS Colorado Springs, CO	1157 nm out, 13 nm south of the line, tower	VFR Sky: a few clouds at 7,000 feet, a broken layer at 10,000 feet, a broken layer at 17,000 feet, a broken layer at 20,000 feet	from the west-southwest (240°) at 14 knots, gusting to 25	10+ mi	10,000 ft	6,187 ft	00:54 UTC
GJT Grand Junction, CO	1337 nm out, 3 nm southeast of the line, tower	VFR Sky: a few clouds at 12,000 feet	from the southeast (140°) at 13 knots, gusting to 23	10+ mi	none	4,861 ft	00:53 UTC
FOM Fillmore, UT	1516 nm out, 13 nm south of the line	low IFR Sky: a broken layer at 400 feet, a broken layer at 1,400 feet, overcast at 2,300 feet Weather: light rain, mist	from the south (190°) at 4 knots	1 mi	400 ft	4,984 ft	01:35 UTC
ELY Ely, NV	1626 nm out, 11 nm north of the line	VFR	from the south (170°) at 12 knots, gusting to 22	10+ mi	none	6,259 ft	00:53 UTC
PVF Placerville, CA	1905 nm out, 3 nm south of the line	reported, no category	calm	10+ mi	none	2,585 ft	23:35 UTC
SMF Sacramento, CA	destination	VFR Sky: a few clouds at 25,000 feet	from the south (190°) at 9 knots	10+ mi	none	26 ft	5:53 pm PDT (00:53 UTC)

The highest airport on this list sits at 6,259 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At SMF when you get there the forecast at the estimated arrival, 12:27 pm PDT (19:27 UTC)

Wind light and variable, visibility more than 6 miles, a few clouds at 25,000 feet VFR

The whole forecast for SMF

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

The forecast for CLT, the departure

From Sun 8:00 pm EDT (00:00 UTC): wind from the southwest at 8 knots, visibility more than 6 miles, scattered clouds at 4,500 feet, a broken layer at 8,000 feet
From Mon 10:00 am EDT (14:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, clear skies
From Mon 3:00 pm EDT (19:00 UTC): wind from the north-northwest at 10 knots, gusting to 17, visibility more than 6 miles, a few clouds at 23,000 feet
From Mon 8:00 pm EDT (00:00 UTC): wind from the north at 4 knots, visibility more than 6 miles, a few clouds at 25,000 feet

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

6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 14 nm from the route, 289 nm along the route · security · until 1 August · ZME
6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 1 nm from the route, 1167 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 3 nm from the route, 1187 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
6/3475 BEALE AFB, CA, Sunday, March 8, 2026 through Sunday, November 1, 2026 Local 15 nm from the route, at the destination end · security · until 1 November · ZOA
6/6740 SACRAMENTO, CA, Thursday, October 8, 2026 through Sunday, October 11, 2026 Local 3 nm from the route, at the destination end · air shows/sports · ended 11 October · ZOA

Daylight

Sunset at CLT 6:52 pm EDT (22:52 UTC), at SMF 6:32 pm PDT (01:32 UTC) (civil twilight ends 6:59 pm PDT (01:59 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 Southeast · loop National Weather Service

Radar now, the central Great Lakes · loop National Weather Service

Radar now, the southern Plains · loop National Weather Service

Radar, the whole country · loop National Weather Service

Surface analysis now Weather Prediction Center

Forecast chart, 12 hours ahead Weather Prediction Center

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: Charlotte/Douglas International, Sacramento International.