Plan a flight · Sun 5:19 pm PDT (00:19 UTC)

Boeing Fld/King County International to Charleston Afb/Intl Airport BFI → CHS

2,095 nautical miles (2,411 statute miles) east on a straight line, true course 099°, about 084° magnetic at the departure end (variation 15E). At 120 knots that is 13 h 26 min at the quickest height in today's winds (39,000 ft, a 36-knot tailwind), arriving about 9:45 am EDT (13:45 UTC). Right now BFI is VFR, wind variable at 6 knots; CHS is VFR, wind from the southwest (230°) at 7 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: 1 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 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 579 to 718 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 1W: moderate turbulence above 18,000 ft from 25,000 ft to 39,000 ft. Over the first 0 nm of the route.
AIRMET ZULU 2C: moderate icing up to 14,000 ft. Over the route from 120 to 339 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 190 to 648 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 259 to 848 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 299 to 668 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 499 to 678 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 559 to 648 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 1756 to 1886 nm out.
AIRMET TANGO 6W: moderate turbulence above 18,000 ft from 28,000 ft to 40,000 ft. Near the route, 1756 nm along the route.
AIRMET SIERRA 4E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 1786 to 1925 nm out.
AIRMET TANGO 5W: moderate turbulence below 18,000 ft (due to mountain wave) up to 7,000 ft. Over the route from 1866 to 1925 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 BFI.

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

E75L at 14,000 ft, 13 nm northeast, 4:22 pm PDT (23:22 UTC): moderate turbulence from 14,000 ft to 21,000 ft, remarks: during the climb zlc. 339 nm along the route, 13 nm northeast of the line.
as filed, and in English
```
MSO UA /OV 32S/TM 2322/FL140/TP E75L/TB MOD 140-210/RM DURC /ZLC
```
Report
a routine report filed through MSO
Where
over 32S
Time
23:22 UTC
Height
at 14,000 ft
Aircraft
E75L
Turbulence
moderate from 14,000 ft to 21,000 ft
Remarks
during the climb zlc
C172 at 5,500 ft, 18 nm south, 3:17 pm PDT (22:17 UTC): a trace of rime icing, 0 °C, remarks: zse. 180 nm along the route, 18 nm south of the line.
as filed, and in English
```
PUW UA /OV PUW250030/TM 2217/FL055/TP C172/TA 00/IC TRACE RIME/RM -ZSE
```
Report
a routine report filed through PUW
Where
30 nm west (250°) of PUW
Time
22:17 UTC
Height
at 5,500 ft
Aircraft
C172
Temperature
0 °C
Icing
trace rime
Remarks
zse
B739 at 3,700 ft, 35 nm north, 2:58 pm PDT (21:58 UTC): overcast above 3,700 ft, remarks: during the descent ils runway 12. 339 nm along the route, 35 nm north of the line.
as filed, and in English
```
MSO UA /OV MSO/TM 2158/FL037/TP B739/SK OVC037/RM DURD ILS RY 12
```
Report
a routine report filed through MSO
Where
over MSO
Time
21:58 UTC
Height
at 3,700 ft
Aircraft
B739
Sky
overcast from 3,700 ft
Remarks
during the descent ils runway 12
B738 at 24,000 ft, 4 nm northeast, 4:13 pm PDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. 439 nm along the route, 4 nm northeast of the line.
as filed, and in English
```
BZN UA /OV BZN270030/TM 2313/FL240/TP B738/RM SN TOP FL 240 /ZLC
```
Report
a routine report filed through BZN
Where
30 nm west (270°) of BZN
Time
23:13 UTC
Height
at 24,000 ft
Aircraft
B738
Remarks
snow top flight level at 24,000 ft zlc
BE9T at 17,500 ft, 20 nm south, 3:40 pm PDT (22:40 UTC): no turbulence, light icing, -6 °C, remarks: ZDVWC-22. 698 nm along the route, 20 nm south of the line.
as filed, and in English
```
GCC UA /OV CZI020012/TM 2240/FL175/TP BE9T/TA M06/TB NEG/IC LGT MIX /RM ZDVWC-22
```
Report
a routine report filed through GCC
Where
12 nm north (020°) of CZI
Time
22:40 UTC
Height
at 17,500 ft
Aircraft
BE9T
Temperature
−6 °C
Turbulence
none
Icing
light mix
Remarks
ZDVWC-22
A21N at 35,000 ft, 5 nm northwest, 3:47 pm PDT (22:47 UTC): no turbulence, remarks: ZDVWC-32. 728 nm along the route, 5 nm northwest of the line.
as filed, and in English
```
GCC UA /OV GCC/TM 2247/FL350/TP A21N/TB NEG /RM ZDVWC-32
```
Report
a routine report filed through GCC
Where
over GCC
Time
22:47 UTC
Height
at 35,000 ft
Aircraft
A21N
Turbulence
none
Remarks
ZDVWC-32
CL35 at 6,000 ft, 8 nm northeast, 2:45 pm PDT (21:45 UTC): remarks: group of multicolored balloons at 6000FT nbd. 1187 nm along the route, 8 nm northeast of the line.
as filed, and in English
```
OMA UA /OV OMA180005/TM 2145/FL060/TP CL35/RM GROUP OF MULTICOLORED BALLOONS AT 6000FT NBD
```
Report
a routine report filed through OMA
Where
5 nm south (180°) of OMA
Time
21:45 UTC
Height
at 6,000 ft
Aircraft
CL35
Remarks
group of multicolored balloons at 6000FT nbd
B737 at 31,000 ft, 33 nm southwest, 5:13 pm PDT (00:13 UTC): light chop turbulence, remarks: ZME25. 1596 nm along the route, 33 nm southwest 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
B738 at 34,000 ft, 28 nm southwest, 4:41 pm PDT (23:41 UTC): light to moderate chop turbulence, remarks: zme. 1666 nm along the route, 28 nm southwest 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
B77W at 31,000 ft, 28 nm southwest, 4:27 pm PDT (23:27 UTC): light to moderate chop turbulence, remarks: zme. 1686 nm along the route, 28 nm southwest 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
A319 at 32,000 ft, 30 nm southwest, 3:56 pm PDT (22:56 UTC): light to moderate chop turbulence, remarks: ZME62. 1696 nm along the route, 30 nm southwest 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
C182 at 5,000 ft, 12 nm northeast, 2:46 pm PDT (21:46 UTC): remarks: zme. 1696 nm along the route, 12 nm northeast of the line.
as filed, and in English
```
BWG UA /OV BWG270005/TM 2146/FL050/TP C182/SK TOP 040/RM ZME
```
Report
a routine report filed through BWG
Where
5 nm west (270°) of BWG
Time
21:46 UTC
Height
at 5,000 ft
Aircraft
C182
Sky
top 4,000 ft
Remarks
zme
A319 at 25,000 ft, 30 nm northeast, 4:14 pm PDT (23:14 UTC): no turbulence. 1706 nm along the route, 30 nm northeast 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
E170 at 11,000 ft, 14 nm southwest, 2:24 pm PDT (21:24 UTC): clear from 11,000 ft to 60,000 ft, remarks: zme. 1716 nm along the route, 14 nm southwest of the line.
as filed, and in English
```
BNA UA /OV BNA045020/TM 2124/FL110/TP E170/SK SKC/RM ZME
```
Report
a routine report filed through BNA
Where
20 nm northeast (045°) of BNA
Time
21:24 UTC
Height
at 11,000 ft
Aircraft
E170
Sky
clear
Remarks
zme

11 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 22 forecast points nearest it (SEA, YKM, GEG, LWS, DLN, BIL, RAP, PIR, ONL, GRI, OMA, DSM, MKC, COU, STL, CGI, EVV, BNA, TYS, GSP, CAE, CHS). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
3,500 ft	260° at 9 kt	−6 kt		126 kt	16 h 38 min	12:57 pm EDT (16:57 UTC)
5,500 ft	280° at 4 kt	−3 kt	13 °C	123 kt	17 h 02 min	1:21 pm EDT (17:21 UTC)
7,500 ft	290° at 6 kt	−5 kt	9 °C	125 kt	16 h 46 min	1:05 pm EDT (17:05 UTC)
9,500 ft	270° at 9 kt	−8 kt	5 °C	128 kt	16 h 22 min	12:41 pm EDT (16:41 UTC)
11,500 ft	270° at 12 kt	−11 kt	2 °C	131 kt	16 h	12:19 pm EDT (16:19 UTC)
13,500 ft	260° at 14 kt	−12 kt	-1 °C	132 kt	15 h 52 min	12:11 pm EDT (16:11 UTC)
15,500 ft	260° at 16 kt	−13 kt	-6 °C	133 kt	15 h 45 min	12:04 pm EDT (16:04 UTC)
17,500 ft	260° at 18 kt	−14 kt	-9 °C	134 kt	15 h 38 min	11:57 am EDT (15:57 UTC)
18,000 ft FL180	260° at 18 kt	−15 kt	-10 °C	135 kt	15 h 31 min	11:50 am EDT (15:50 UTC)
24,000 ft FL240	250° at 25 kt	−19 kt	-21 °C	139 kt	15 h 04 min	11:23 am EDT (15:23 UTC)
30,000 ft FL300	250° at 30 kt	−22 kt	-34 °C	142 kt	14 h 45 min	11:04 am EDT (15:04 UTC)
34,000 ft FL340	250° at 38 kt	−28 kt	-41 °C	148 kt	14 h 09 min	10:28 am EDT (14:28 UTC)
39,000 ft FL390	260° at 44 kt	−36 kt	-48 °C	156 kt	13 h 26 min	9:45 am EDT (13:45 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
SEA	used from 0 nm out; 25 nm from the line	360/9	350/10 1°	010/10 -5°	030/20 -11°	020/60 -17°	010/86 -26°	360/90 -40°	010/68 -42°	360/31 -43°
YKM	used from 50 nm out; 45 nm from the line	030/16	020/18 0°	030/30 -8°	030/23 -13°	020/40 -23°	010/73 -29°	010/54 -36°	360/29 -37°	330/16 -40°
GEG	used from 150 nm out; 44 nm from the line		050/18 -2°	060/19 -8°	L/V -11°	160/11 -24°	190/17 -31°	200/19 -35°	220/14 -37°	250/11 -41°
LWS	used from 200 nm out; 26 nm from the line	010/5	050/14 -2°	040/12 -6°	160/7 -10°	190/30 -22°	200/54 -27°	200/48 -35°	210/40 -37°	230/32 -41°
DLN	used from 349 nm out; 66 nm from the line			080/10 -3°	180/8 -3°	180/23 -14°	200/58 -22°	200/80 -36°	220/85 -41°	230/81 -45°
BIL	used from 499 nm out; 64 nm from the line		080/24	130/14 -1°	180/33 0°	210/43 -10°	220/58 -21°	200/55 -36°	220/75 -44°	240/83 -48°
RAP	used from 698 nm out; 109 nm from the line		120/15 12°	180/22 11°	220/26 5°	230/35 -9°	240/40 -22°	240/50 -37°	240/51 -41°	240/47 -47°
PIR	used from 898 nm out; 92 nm from the line		L/V 17°	230/13 12°	220/22 6°	250/31 -9°	250/34 -21°	240/50 -35°	230/61 -43°	240/62 -51°
ONL	used from 948 nm out; 72 nm from the line		200/20 17°	230/26 14°	240/21 7°	250/27 -9°	260/32 -19°	240/44 -34°	240/56 -41°	250/62 -51°
GRI	used from 1097 nm out; 61 nm from the line		210/31 19°	240/21 14°	240/17 6°	260/27 -7°	260/34 -18°	240/45 -32°	250/56 -40°	260/62 -51°
OMA	used from 1147 nm out; 18 nm from the line	190/34	230/34 19°	250/25 12°	250/18 6°	250/22 -7°	250/28 -19°	260/34 -32°	260/39 -41°	280/56 -51°
DSM	used from 1247 nm out; 73 nm from the line	200/32	240/27 17°	260/19 10°	260/16 5°	260/19 -7°	240/22 -19°	270/20 -32°	270/38 -42°	290/58 -53°
MKC	used from 1297 nm out; 78 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°
COU	used from 1347 nm out; 50 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°
STL	used from 1447 nm out; 12 nm from the line	210/13	260/16 17°	270/21 10°	280/24 5°	310/20 -7°	320/22 -18°	320/44 -33°	320/59 -43°	310/69 -51°
CGI	used from 1546 nm out; 54 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°
EVV	used from 1596 nm out; 40 nm from the line	310/13	340/26 16°	330/29 10°	330/32 4°	330/30 -9°	340/38 -20°	330/60 -35°	320/57 -41°	330/39 -48°
BNA	used from 1646 nm out; 56 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°
TYS	used from 1796 nm out; 28 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°
GSP	used from 1895 nm out; 35 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°
CAE	used from 1995 nm out; 18 nm from the line	260/27	310/26 11°	280/31 9°	270/36 7°	250/39 -4°	230/57 -16°	220/74 -30°	220/83 -40°	220/73 -51°
CHS	used from 2045 nm out; 25 nm from the line	260/22	280/26 12°	260/37 12°	250/40 8°	240/54 -4°	230/55 -15°	220/61 -31°	200/66 -41°	210/62 -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

Airport	Where	Conditions	Wind	Visibility	Ceiling	Elevation	Reported
BFI Seattle, WA	departure	VFR	variable at 6 knots	10+ mi	none	21 ft	4:53 pm PDT (23:53 UTC)
MWH Moses Lake, WA	120 nm out, 4 nm northeast of the line, tower	VFR Sky: a broken layer at 10,000 feet	from the east-northeast (070°) at 14 knots	10+ mi	10,000 ft	1,188 ft	23:52 UTC
BTM Butte, MT	419 nm out, 6 nm west of the line	low IFR Sky: scattered clouds at 400 feet, overcast at 900 feet Weather: snow, freezing fog	from the north (360°) at 6 knots	0.5 mi	900 ft	5,550 ft	00:08 UTC
BZN Bozeman, MT	469 nm out, 4 nm northeast of the line, tower	low IFR Sky: scattered clouds at 200 feet, scattered clouds at 700 feet, overcast at 1,100 feet Weather: snow, fog	calm	0.5 mi	1,100 ft	4,473 ft	23:56 UTC
RAP Rapid City, SD	828 nm out, 25 nm northeast of the line, tower	marginal VFR Sky: a broken layer at 1,400 feet, overcast at 2,000 feet	from the northeast (050°) at 8 knots	10+ mi	1,400 ft	3,203 ft	00:03 UTC
ANW Ainsworth, NE	988 nm out, 1 nm south of the line	VFR	from the north-northeast (030°) at 4 knots	10+ mi	none	2,588 ft	23:55 UTC
OMA Omaha, NE	1187 nm out, 12 nm north of the line, tower	VFR Sky: a broken layer at 25,000 feet	from the south (180°) at 11 knots	10+ mi	25,000 ft	984 ft	23:52 UTC
TRX Trenton, MO	1317 nm out, 4 nm west of the line	no report just now				757 ft
CPS Cahokia/St Louis, IL	1496 nm out, 1 nm northeast of the line, tower	VFR	from the south-southeast (150°) at 3 knots	10+ mi	none	412 ft	23:53 UTC
TYS Knoxville, TN	1836 nm out, 25 nm northeast of the line, tower	marginal VFR Sky: a few clouds at 1,200 feet, overcast at 1,800 feet	from the southwest (220°) at 7 knots	7 mi	1,800 ft	986 ft	23:53 UTC
CAE Columbia, SC	2015 nm out, 17 nm northeast of the line, tower	VFR Sky: a few clouds at 2,600 feet	from the southwest (220°) at 5 knots	10+ mi	none	235 ft	00:06 UTC
CHS Charleston, SC	destination	VFR Sky: a broken layer at 4,200 feet	from the southwest (230°) at 7 knots	10+ mi	4,200 ft	46 ft	7:56 pm EDT (23:56 UTC)

The highest airport on this list sits at 5,550 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At CHS when you get there the forecast at the estimated arrival, 9:45 am EDT (13:45 UTC)

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

The whole forecast for CHS

From Sun 8:00 pm EDT (00:00 UTC): wind from the west at 8 knots, visibility more than 6 miles, scattered clouds at 4,000 feet
At times between Sun 8:00 pm EDT (00:00 UTC) and 10:00 pm EDT (02:00 UTC): a broken layer at 4,000 feet
From Sun 11:00 pm EDT (03:00 UTC): wind from the west at 6 knots, visibility more than 6 miles, clear skies
From Mon 11:00 am EDT (15:00 UTC): wind from the northwest at 8 knots, visibility more than 6 miles, clear skies

The forecast for BFI, the departure

From Sun 5:00 pm PDT (00:00 UTC): wind from the north-northwest at 8 knots, gusting to 18, visibility more than 6 miles, a few clouds at 5,000 feet
From Sun 7:00 pm PDT (02:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
From Mon 3:00 am PDT (10:00 UTC): wind light and variable, visibility more than 6 miles, patches of fog, clear skies
From Mon 9:00 am PDT (16:00 UTC): wind from the south-southeast at 3 knots, visibility more than 6 miles, clear skies
From Mon 12:00 pm PDT (19:00 UTC): wind from the west-southwest at 3 knots, visibility more than 6 miles, clear skies
From Mon 2:00 pm PDT (21:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, clear skies

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

6/7634 CENTRALIA, MO, Monday, October 12, 2026 UTC 17 nm from the route, 1397 nm along the route · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · today · ZKC
6/0708 Goodlettsville, TN, Saturday, August 1, 2026 through Sunday, August 1, 2027 UTC 22 nm from the route, 1706 nm along the route · security · until 1 August · ZME

Daylight

Sunset at BFI 6:27 pm PDT (01:27 UTC), at CHS 6:50 pm EDT (22:50 UTC) (civil twilight ends 7:15 pm EDT (23:15 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 Northwest · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the upper Mississippi valley · 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: Boeing Fld/King County International, Charleston Afb/Intl Airport.