Plan a flight · Sun 8:33 pm MDT (02:33 UTC)

Dubois Municipal to Chicago/Rockford International DUB → RFD

907 nautical miles (1,044 statute miles) east on a straight line, true course 088°, about 078° magnetic at the departure end (variation 10E). At 120 knots that is 5 h 11 min at the quickest height in today's winds (39,000 ft, a 55-knot tailwind), arriving about 2:44 am CDT (07:44 UTC), after sunset at the destination. Right now DUB is IFR, wind from the east-southeast (120°) at 12 knots, gusting to 19; RFD is VFR, wind calm. 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 8W: thunderstorms (a convective SIGMET) up to 35,000 ft, moving from the southwest at 40 knots, until 9:55 pm MDT (03:55 UTC). Over the route from 60 to 229 nm out.

as issued

WSUS33 KKCI 120155
MKCW WST 120155
CONVECTIVE SIGMET 8W
VALID UNTIL 0355Z
CO MT WY
FROM 40N SHR-60WNW RAP-20ENE CYS-30SW CYS-10NW BOY-40N SHR
AREA TS MOV FROM 22040KT. TOPS TO FL350.

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 first 369 nm of the route.
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 first 170 nm of the route.
AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the first 120 nm of the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 319 nm of the route.
AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 209 nm of the route.
AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 140 nm of the route.
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 638 to 778 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 DUB.

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

urgent CRJ2 at 7,000 ft, 39 nm south, 7:04 pm MDT (01:04 UTC): moderate turbulence, remarks: low-level wind shear dept runway 03 gain/loss unknown. 140 nm along the route, 39 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, 40 nm northwest, 7:47 pm MDT (01:47 UTC): moderate rime icing above 15,000 ft, -5 °C. At the departure end, 40 nm northwest 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
A320 descending, 45 nm west, 6:54 pm MDT (00:54 UTC): overcast above 7,500 ft, remarks: braking action good during the descent runway 19. At the departure end, 45 nm west of the line.
as filed, and in English
```
JAC UA /OV JAC/TM 0054/FLUNKN/TP A320/SK OVC075/RM BRAKING ACTION GOOD DURD RY19
```
Report
a routine report filed through JAC
Where
over JAC
Time
00:54 UTC
Height
height not given
Aircraft
A320
Sky
overcast from 7,500 ft
Remarks
braking action good during the descent runway 19
BE20 at 15,000 ft, 39 nm north, 7:56 pm MDT (01:56 UTC): -5 °C, remarks: clear out at at 22,000 ft ZDVWC-31. 229 nm along the route, 39 nm north of the line.
as filed, and in English
```
CUT UA /OV ECS340020/TM 0156/FL150/TP BE20/TA M05/IC T RIME 150-180/RM CLR OUT AT 220 ZDVWC-31
```
Report
a routine report filed through CUT
Where
20 nm north (340°) of ECS
Time
01:56 UTC
Height
at 15,000 ft
Aircraft
BE20
Temperature
−5 °C
Icing
T rime from 15,000 ft to 18,000 ft
Remarks
clear out at at 22,000 ft ZDVWC-31
B763 at 32,000 ft, 21 nm north, 7:29 pm MDT (01:29 UTC): light to moderate clear-air turbulence, remarks: zdvwc. 369 nm along the route, 21 nm north of the line.
as filed, and in English
```
RAP UA /OV RAP084081/TM 0129/FL320/TP B763/TB OCNL LGT-MOD CAT/RM ZDVWC
```
Report
a routine report filed through RAP
Where
81 nm east (084°) of RAP
Time
01:29 UTC
Height
at 32,000 ft
Aircraft
B763
Turbulence
occasional light to moderate clear-air turbulence
Remarks
zdvwc
A321 at 32,000 ft, 18 nm south, 7:56 pm MDT (01:56 UTC): light turbulence, remarks: pocket continuous light turbulence. At the destination end, 18 nm south of the line.
as filed, and in English
```
RPJ UA /OV PLL/TM 0156/FL320/TP A321/TB CONS LGT/RM POCKET CONS LGT TB
```
Report
a routine report filed through RPJ
Where
over PLL
Time
01:56 UTC
Height
at 32,000 ft
Aircraft
A321
Turbulence
continuous light
Remarks
pocket continuous light turbulence

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 8 forecast points nearest it (LND, RAP, PIR, ONL, FSD, MCW, DBQ, JOT). A plus sign is a headwind, a minus sign a tailwind.

Height	Average wind	Head- or tailwind	Temperature	Ground speed	Time en route	Arrival
5,500 ft	220° at 23 kt	−12 kt	15 °C	132 kt	6 h 52 min	4:25 am CDT (09:25 UTC)
7,500 ft	220° at 22 kt	−12 kt	13 °C	132 kt	6 h 52 min	4:25 am CDT (09:25 UTC)
9,500 ft	220° at 22 kt	−13 kt	10 °C	133 kt	6 h 49 min	4:22 am CDT (09:22 UTC)
11,500 ft	220° at 24 kt	−15 kt	6 °C	135 kt	6 h 43 min	4:16 am CDT (09:16 UTC)
13,500 ft	230° at 25 kt	−17 kt	1 °C	137 kt	6 h 37 min	4:10 am CDT (09:10 UTC)
15,500 ft	230° at 24 kt	−18 kt	-3 °C	138 kt	6 h 34 min	4:07 am CDT (09:07 UTC)
17,500 ft	240° at 25 kt	−20 kt	-8 °C	140 kt	6 h 29 min	4:02 am CDT (09:02 UTC)
18,000 ft FL180	240° at 25 kt	−20 kt	-9 °C	140 kt	6 h 29 min	4:02 am CDT (09:02 UTC)
24,000 ft FL240	240° at 30 kt	−27 kt	-21 °C	147 kt	6 h 10 min	3:43 am CDT (08:43 UTC)
30,000 ft FL300	240° at 39 kt	−33 kt	-34 °C	153 kt	5 h 56 min	3:29 am CDT (08:29 UTC)
34,000 ft FL340	250° at 49 kt	−46 kt	-40 °C	166 kt	5 h 28 min	3:01 am CDT (08:01 UTC)
39,000 ft FL390	260° at 57 kt	−55 kt	-48 °C	175 kt	5 h 11 min	2:44 am CDT (07:44 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
LND	used from 0 nm out; 48 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 150 nm out; 117 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°
PIR	used from 349 nm out; 67 nm from the line		170/22 19°	190/25 13°	210/32 6°	240/23 -9°	250/32 -21°	250/38 -36°	260/44 -40°	260/52 -47°
ONL	used from 449 nm out; 50 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°
FSD	used from 499 nm out; 47 nm from the line	190/9	230/30 18°	240/23 13°	240/20 6°	260/22 -9°	250/31 -21°	250/43 -36°	260/49 -43°	270/53 -47°
MCW	used from 648 nm out; 46 nm from the line	220/44	250/30 17°	230/14 12°	240/17 6°	250/22 -8°	270/29 -20°	250/34 -34°	260/52 -43°	260/59 -51°
DBQ	used from 748 nm out; 62 nm from the line	230/33	250/30 16°	280/15 9°	260/15 5°	260/21 -7°	260/24 -20°	250/37 -33°	270/42 -43°	280/63 -52°
JOT	used from 897 nm out; 62 nm from the line	250/23	270/22 15°	250/16 10°	240/9 4°	280/22 -7°	280/29 -19°	300/29 -34°	290/50 -43°	300/64 -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
DUB Dubois, WY	departure	IFR Sky: overcast at 500 feet Weather: light rain	from the east-southeast (120°) at 12 knots, gusting to 19	10+ mi	500 ft	7,298 ft	8:15 pm MDT (02:15 UTC)
HSG Thermopolis, WY	60 nm out, 9 nm north of the line	IFR Sky: overcast at 600 feet Weather: mist	from the north (360°) at 5 knots	4 mi	600 ft	4,891 ft	02:15 UTC
CUT Custer, SD	259 nm out, 12 nm northeast of the line	VFR Sky: scattered clouds at 300 feet	from the north-northeast (030°) at 5 knots	9 mi	none	5,619 ft	02:25 UTC
HSR Hot Springs, SD	279 nm out, 11 nm southwest of the line	no report just now				3,150 ft
ICR Winner, SD	429 nm out, 1 nm north of the line	marginal VFR Sky: overcast at 1,500 feet	from the north-northwest (340°) at 5 knots	10+ mi	1,500 ft	2,032 ft	01:53 UTC
AGZ Wagner, SD	499 nm out, 12 nm south of the line	VFR	from the northwest (320°) at 6 knots	10+ mi	none	1,477 ft	02:15 UTC
SXK Maurice, IA	588 nm out, 7 nm south of the line	VFR	from the west (270°) at 4 knots	10+ mi	none	1,408 ft	02:15 UTC
HPT Hampton, IA	718 nm out, 5 nm southeast of the line	VFR	from the south (190°) at 9 knots	10+ mi	none	1,176 ft	02:15 UTC
ALO Waterloo, IA	758 nm out, 7 nm south of the line, tower	VFR	from the south (180°) at 11 knots	10+ mi	none	873 ft	01:54 UTC
DBQ Dubuque, IA	838 nm out, 4 nm southwest of the line, tower	VFR	from the south (170°) at 8 knots	10+ mi	none	1,076 ft	01:53 UTC
RFD Chicago/Rockford, IL	destination	VFR Sky: a few clouds at 25,000 feet	calm	10+ mi	none	742 ft	8:54 pm CDT (01:54 UTC)

The highest airport on this list sits at 7,298 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, 2:44 am CDT (07:44 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

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 DUB 6:40 pm MDT (00:40 UTC), at RFD 6:19 pm CDT (23:19 UTC) (civil twilight ends 6:47 pm CDT (23:47 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 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: Dubois Municipal, Chicago/Rockford International.