Plan a flight · Sun 8:29 pm PDT (03:29 UTC)

Seattle-Tacoma International to Huntsville Intl-Carl T Jones Field SEA → HSV

1,763 nautical miles (2,029 statute miles) east on a straight line, true course 103°, about 087° magnetic at the departure end (variation 16E). At 120 knots that is 11 h 27 min at the quickest height in today's winds (39,000 ft, a 34-knot tailwind), arriving about 9:56 am CDT (14:56 UTC). 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 2C: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 40 knots, until 9:55 pm PDT (04:55 UTC). Near the route, 737 nm along the route.
as issued
```
WSUS32 KKCI 120255
MKCC WST 120255
CONVECTIVE SIGMET 2C
VALID UNTIL 0455Z
NE CO WY
FROM 40SE CZI-30WNW BFF-30SSE LAR-70NW LAR-40SE CZI
AREA TS MOV FROM 22040KT. TOPS TO FL310.
```
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 149 nm of the route.
AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the route from 60 to 458 nm out.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 219 to 697 nm out.
AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 249 to 448 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 369 to 687 nm out.
AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 478 to 667 nm out.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 488 to 787 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 548 to 737 nm out.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 578 to 907 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 956 to 1305 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). Near the route, at the destination end.

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 SEA.

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

urgent CRJ2 at 7,000 ft, 43 nm south, 6:04 pm PDT (01:04 UTC): moderate turbulence, remarks: low-level wind shear dept runway 03 gain/loss unknown. 717 nm along the route, 43 nm south of the line.
as filed, and in English
```
CPR UUA /OV CPR035002/TM 0104/FL070/TP CRJ2/TB CONT MOD TURB/RM LLWS DEPT RY03 GAIN/LOSS UNKN
```
Report
an urgent report filed through CPR
Where
2 nm northeast (035°) of CPR
Time
01:04 UTC
Height
at 7,000 ft
Aircraft
CRJ2
Turbulence
continuous moderate turbulence
Remarks
low-level wind shear dept runway 03 gain/loss unknown
S22T at 15,000 ft, 39 nm southwest, 6:47 pm PDT (01:47 UTC): moderate rime icing above 15,000 ft, -5 °C. 548 nm along the route, 39 nm southwest of the line.
as filed, and in English
```
JAC UA /OV DNW010020/TM 0147/FL150/TP S22T/TA M05/IC MOD RIME 150 /ZLC
```
Report
a routine report filed through JAC
Where
20 nm north (010°) of DNW
Time
01:47 UTC
Height
at 15,000 ft
Aircraft
S22T
Temperature
−5 °C
Icing
moderate rime at 15,000 ft zlc
A321 at 13,500 ft, 28 nm south, 6:54 pm PDT (01:54 UTC): remarks: zse. At the departure end, 28 nm south of the line.
as filed, and in English
```
SEA UA /OV SEA120045/TM 0154/FL135/TP A321/SK TOP130/RM ZSE
```
Report
a routine report filed through SEA
Where
45 nm southeast (120°) of SEA
Time
01:54 UTC
Height
at 13,500 ft
Aircraft
A321
Sky
TOP130
Remarks
zse
SB20 at 16,000 ft, 34 nm north, 6:52 pm PDT (01:52 UTC): remarks: zse. At the departure end, 34 nm north of the line.
as filed, and in English
```
PAE UA /OV PAE075045/TM 0152/FL160/TP SB20/SK TOP120/RM ZSE
```
Report
a routine report filed through PAE
Where
45 nm east (075°) of PAE
Time
01:52 UTC
Height
at 16,000 ft
Aircraft
SB20
Sky
TOP120
Remarks
zse
PC12 at 15,000 ft, 28 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 28 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL150/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 15,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 13,000 ft, 28 nm south, 5:42 pm PDT (00:42 UTC): remarks: zse. At the departure end, 28 nm south of the line.
as filed, and in English
```
YKM UA /OV YKM270050/TM 0042/FL130/TP PC12/SK TOP130/RM -ZSE
```
Report
a routine report filed through YKM
Where
50 nm west (270°) of YKM
Time
00:42 UTC
Height
at 13,000 ft
Aircraft
PC12
Sky
TOP130
Remarks
zse
PC12 at 13,500 ft, 13 nm south, 6:08 pm PDT (01:08 UTC): no turbulence, a trace of icing, overcast from 9,000 ft to 13,500 ft, -10 °C. 139 nm along the route, 13 nm south of the line.
as filed, and in English
```
PSC UA /OV PSC360025/TM 0108/FL135/TP PC12/SK OVC090-TOP135/TA M10/TB NEG /IC TRACE RM 135-090
```
Report
a routine report filed through PSC
Where
25 nm north (360°) of PSC
Time
01:08 UTC
Height
at 13,500 ft
Aircraft
PC12
Sky
overcast from 9,000 ft, tops 13,500 ft
Temperature
−10 °C
Turbulence
none
Icing
trace remarks from 13,500 ft to 9,000 ft
E75L descending, 38 nm north, 6:04 pm PDT (01:04 UTC): remarks: had the airport in sight at 400-500FT above ground. 468 nm along the route, 38 nm north of the line.
as filed, and in English
```
BZN UA /OV BZN/TM 0104/FLDURD/TP E75L/RM HAD THE AIRPORT IN SIGHT AT 400-500FT AGL
```
Report
a routine report filed through BZN
Where
over BZN
Time
01:04 UTC
Height
during the descent
Aircraft
E75L
Remarks
had the airport in sight at 400-500FT above ground
UAL1076 at 30,000 ft, 3 nm south, 7:36 pm PDT (02:36 UTC): light turbulence, wind 225° at 60 knots. 638 nm along the route, 3 nm south of the line.
as filed, and in English
```
ARP UAL1076 4405N 10749W 0236 F300 225/060KT TB CONT LGT TURB IC
```
Report
a routine report filed through ARP

Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 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 16 forecast points nearest it (SEA, YKM, LWS, DLN, BIL, LND, RAP, BFF, ONL, GRI, MKC, COU, SGF, CGI, MEM, HSV). 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	230° at 12 kt	−3 kt		123 kt	14 h 20 min	12:49 pm CDT (17:49 UTC)
5,500 ft	220° at 12 kt	−2 kt	19 °C	122 kt	14 h 27 min	12:56 pm CDT (17:56 UTC)
7,500 ft	230° at 10 kt	−3 kt	8 °C	123 kt	14 h 20 min	12:49 pm CDT (17:49 UTC)
9,500 ft	240° at 10 kt	−5 kt	5 °C	125 kt	14 h 06 min	12:35 pm CDT (17:35 UTC)
11,500 ft	230° at 12 kt	−5 kt	2 °C	125 kt	14 h 06 min	12:35 pm CDT (17:35 UTC)
13,500 ft	230° at 14 kt	−6 kt	-2 °C	126 kt	14 h	12:29 pm CDT (17:29 UTC)
15,500 ft	240° at 16 kt	−8 kt	-6 °C	128 kt	13 h 46 min	12:15 pm CDT (17:15 UTC)
17,500 ft	240° at 17 kt	−9 kt	-10 °C	129 kt	13 h 40 min	12:09 pm CDT (17:09 UTC)
18,000 ft FL180	240° at 18 kt	−9 kt	-11 °C	129 kt	13 h 40 min	12:09 pm CDT (17:09 UTC)
24,000 ft FL240	230° at 22 kt	−10 kt	-22 °C	130 kt	13 h 34 min	12:03 pm CDT (17:03 UTC)
30,000 ft FL300	250° at 31 kt	−21 kt	-33 °C	141 kt	12 h 30 min	10:59 am CDT (15:59 UTC)
34,000 ft FL340	260° at 39 kt	−30 kt	-38 °C	150 kt	11 h 45 min	10:14 am CDT (15:14 UTC)
39,000 ft FL390	260° at 42 kt	−34 kt	-46 °C	154 kt	11 h 27 min	9:56 am CDT (14:56 UTC)

Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 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	050/7	050/11 1°	050/12 -5°	030/31 -7°	010/61 -15°	010/69 -26°	360/73 -40°	360/62 -47°	330/21 -43°
YKM	used from 50 nm out; 35 nm from the line	070/10	040/15 -1°	020/27 -8°	030/25 -13°	020/48 -20°	010/83 -27°	010/77 -37°	010/49 -40°	350/14 -41°
LWS	used from 149 nm out; 53 nm from the line	070/10	080/12 -2°	030/12 -6°	080/7 -10°	170/34 -21°	160/46 -32°	200/33 -35°	220/22 -35°	230/18 -38°
DLN	used from 349 nm out; 53 nm from the line			090/6 -6°	240/22 -4°	210/34 -16°	210/62 -25°	210/66 -34°	210/82 -36°	220/77 -42°
BIL	used from 498 nm out; 93 nm from the line		080/13	180/9 -2°	210/38 0°	220/51 -11°	210/46 -22°	210/58 -35°	230/73 -39°	230/72 -45°
LND	used from 598 nm out; 89 nm from the line			200/23 6°	220/31 1°	220/39 -11°	230/39 -23°	220/51 -28°	220/66 -37°	230/68 -45°
RAP	used from 747 nm out; 97 nm from the line		180/23 12°	200/38 13°	210/38 6°	220/28 -10°	230/34 -21°	230/37 -36°	250/52 -38°	250/59 -46°
BFF	used from 797 nm out; 61 nm from the line		180/28	220/33 15°	210/31 7°	230/32 -9°	220/41 -21°	220/40 -33°	240/47 -36°	250/54 -46°
ONL	used from 946 nm out; 111 nm from the line		210/31 20°	230/27 13°	230/18 7°	220/19 -8°	240/26 -20°	250/44 -35°	270/52 -39°	260/57 -47°
GRI	used from 996 nm out; 79 nm from the line		230/35 21°	230/23 13°	220/20 7°	240/25 -8°	240/37 -20°	250/49 -33°	260/57 -38°	260/58 -47°
MKC	used from 1196 nm out; 82 nm from the line	220/44	250/28 18°	250/18 13°	240/12 6°	280/24 -6°	240/34 -18°	260/47 -30°	260/51 -40°	270/58 -50°
COU	used from 1345 nm out; 65 nm from the line	230/31	230/30 15°	260/16 11°	270/14 6°	260/24 -6°	270/27 -18°	270/37 -32°	280/49 -41°	290/56 -51°
SGF	used from 1395 nm out; 56 nm from the line	230/33	230/28 15°	250/20 13°	240/18 7°	250/20 -6°	250/24 -17°	280/42 -31°	280/49 -40°	290/46 -51°
CGI	used from 1494 nm out; 63 nm from the line	240/20	270/15 15°	280/15 11°	300/13 6°	290/20 -6°	280/24 -18°	300/34 -32°	300/47 -41°	310/49 -51°
MEM	used from 1594 nm out; 73 nm from the line	230/19	260/16 15°	270/17 12°	300/13 6°	300/15 -5°	300/26 -18°	300/34 -32°	300/41 -40°	310/46 -52°
HSV	used from 1694 nm out; 45 nm from the line	310/20	330/20 16°	320/27 11°	340/23 5°	320/23 -7°	340/30 -17°	320/50 -33°	330/61 -41°	340/41 -50°

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	Elevation
SEA Seattle, WA	departure	no report just now	432 ft
MWH Moses Lake, WA	120 nm out, 15 nm northeast of the line, tower	no report just now	1,188 ft
LWS Lewiston, ID	229 nm out, 8 nm southwest of the line, tower	no report just now	1,442 ft
EKS Ennis, MT	458 nm out, 3 nm northeast of the line	no report just now	5,432 ft
COD Cody, WY	578 nm out, 3 nm east of the line	no report just now	5,102 ft
LSK Lusk, WY	807 nm out, 14 nm southwest of the line	no report just now	4,966 ft
BBW Broken Bow, NE	1036 nm out, 13 nm north of the line	no report just now	2,546 ft
GRI Grand Island, NE	1096 nm out, 17 nm northeast of the line, tower	no report just now	1,847 ft
OJC Olathe, KS	1305 nm out, 8 nm southwest of the line, tower	no report just now	1,096 ft
TBN Fort Leonard Wood, MO	1445 nm out, 3 nm north of the line, tower	no report just now	1,159 ft
MKL Jackson, TN	1644 nm out, 15 nm southwest of the line, tower	no report just now	434 ft
HSV Huntsville, AL	destination	no report just now	628 ft

The highest airport on this list sits at 5,432 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At HSV when you get there the forecast at the estimated arrival, 9:56 am CDT (14:56 UTC)

HSV has no terminal forecast; use the nearest airport that does.

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 SEA 6:27 pm PDT (01:27 UTC), at HSV 6:16 pm CDT (23:16 UTC) (civil twilight ends 6:41 pm CDT (23:41 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 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: Seattle-Tacoma International, Huntsville Intl-Carl T Jones Field.