Plan a flight · Mon 10:35 am CDT (15:35 UTC)

Green Bay/Austin Straubel International to City Of Colorado Springs Municipal GRB → COS

816 nautical miles (939 statute miles) west on a straight line, true course 251°, about 253° magnetic at the departure end (variation 2W). At 120 knots that is 8 h 20 min at the quickest height in today's winds (4,500 ft, a 22-knot headwind), arriving about 5:55 pm MDT (23:55 UTC). Right now GRB is VFR, wind from the south-southwest (210°) at 8 knots; COS is VFR, wind from the south (190°) at 10 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

AIRMET TANGO 2W: 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 378 to 527 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). Near the route, 488 nm along the route.
AIRMET TANGO 4W: moderate turbulence above 18,000 ft (due to mountain wave) from 34,000 ft to 43,000 ft. Over the last 109 nm of the route.
AIRMET TANGO 2W: moderate turbulence below 18,000 ft (due to mountain wave) up to 22,000 ft. Over the last 40 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 GRB.

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

urgent C172 at 6,700 ft, 43 nm northwest, 7:54 am CDT (12:54 UTC): remarks: low-level wind shear + 10 knots during the climb. At the destination end, 43 nm northwest of the line.
as filed, and in English
```
APA UUA /OV KAPA/TM 1254/FL067/TP C172/RM LLWS +/- 10 KTS DURC
```
Report
an urgent report filed through APA
Where
over KAPA
Time
12:54 UTC
Height
at 6,700 ft
Aircraft
C172
Remarks
low-level wind shear + 10 knots during the climb
urgent FA7X at 6,800 ft, 43 nm northwest, 7:40 am CDT (12:40 UTC): remarks: low-level wind shear a 40-knot loss of airspeed knots during the climb runway 35R. At the destination end, 43 nm northwest of the line.
as filed, and in English
```
APA UUA /OV KAPA/TM 1240/FL068/TP FA7X/RM LLWS -40 KTS DURC RY 35R
```
Report
an urgent report filed through APA
Where
over KAPA
Time
12:40 UTC
Height
at 6,800 ft
Aircraft
FA7X
Remarks
low-level wind shear a 40-knot loss of airspeed knots during the climb runway 35R
urgent E75L at 6,600 ft, 0 nm southwest, 9:08 am CDT (14:08 UTC): light turbulence, remarks: low-level wind shear a 25-knot gain of airspeed during the climb 17L. At the destination end, 0 nm southwest of the line.
as filed, and in English
```
COS UUA /OV COS/TM 1408/FL066/TP E75L/TB LGT/RM LLWS +25KTS DURC 17L
```
Report
an urgent report filed through COS
Where
over COS
Time
14:08 UTC
Height
at 6,600 ft
Aircraft
E75L
Turbulence
light
Remarks
low-level wind shear a 25-knot gain of airspeed during the climb 17L
B38M at 12,000 ft, 36 nm northwest, 9:07 am CDT (14:07 UTC): moderate turbulence, remarks: from 11,000 ft to 12,000 ft. 766 nm along the route, 36 nm northwest of the line.
as filed, and in English
```
DEN UA /OV DEN090025/TM 1407/FL120/TP B38M/TB MOD/RM 110-120
```
Report
a routine report filed through DEN
Where
25 nm east (090°) of DEN
Time
14:07 UTC
Height
at 12,000 ft
Aircraft
B38M
Turbulence
moderate
Remarks
from 11,000 ft to 12,000 ft
C172 at 7,500 ft, 37 nm northwest, 10:27 am CDT (15:27 UTC): moderate turbulence. At the destination end, 37 nm northwest of the line.
as filed, and in English
```
APA UA /OV APA100008/TM 1527/FL075/TP C172/TB CONT MOD
```
Report
a routine report filed through APA
Where
8 nm east (100°) of APA
Time
15:27 UTC
Height
at 7,500 ft
Aircraft
C172
Turbulence
continuous moderate
C172 at 9,500 ft, 10 nm northwest, 7:43 am CDT (12:43 UTC): moderate chop turbulence. At the destination end, 10 nm northwest of the line.
as filed, and in English
```
COS UA /OV BRK348/005/TM 1243/FL095/TP C172/TB TB MOD CHOP
```
Report
a routine report filed through COS
Where
BRK348/005
Time
12:43 UTC
Height
at 9,500 ft
Aircraft
C172
Turbulence
turbulence moderate chop
E55P at 8,000 ft, 5 nm south, 9:30 am CDT (14:30 UTC): moderate turbulence. At the destination end, 5 nm south of the line.
as filed, and in English
```
COS UA /OV 5S COS/TM 1430/FL080/TP E55P/TB MOD
```
Report
a routine report filed through COS
Where
5S cos
Time
14:30 UTC
Height
at 8,000 ft
Aircraft
E55P
Turbulence
moderate
F2TH at 36,300 ft, 33 nm southeast, 8:15 am CDT (13:15 UTC): moderate clear-air turbulence above 36,300 ft, wind 255° at 90 knots. At the destination end, 33 nm southeast of the line.
as filed, and in English
```
PUB UA /OV PUB /TM 1315 /FL363 /TP F2TH /WV 25590KT /TB MOD CAT 363
```
Report
a routine report filed through PUB
Where
over PUB
Time
13:15 UTC
Height
at 36,300 ft
Aircraft
F2TH
Wind
from 255° at 90 knots
Turbulence
moderate clear-air turbulence at 36,300 ft
B738 descending, 47 nm northwest, 7:55 am CDT (12:55 UTC): moderate turbulence from 16,000 ft to 20,000 ft. At the destination end, 47 nm northwest of the line.
as filed, and in English
```
DEN UA /OV 40SW DEN/TM 1255/FLDURD/TP B738/TB MOD 200-160
```
Report
a routine report filed through DEN
Where
40SW den
Time
12:55 UTC
Height
during the descent
Aircraft
B738
Turbulence
moderate from 20,000 ft to 16,000 ft
PC12 at 20,000 ft, 42 nm south, 8:27 am CDT (13:27 UTC): no turbulence. 109 nm along the route, 42 nm south of the line.
as filed, and in English
```
LNR UA /OV 0WI4/TM 1327/FL200/TP PC12/TB NEG
```
Report
a routine report filed through LNR
Where
over 0WI4
Time
13:27 UTC
Height
at 20,000 ft
Aircraft
PC12
Turbulence
none
C510 at 17,000 ft, 42 nm south, 8:27 am CDT (13:27 UTC): no turbulence. 109 nm along the route, 42 nm south of the line.
as filed, and in English
```
LNR UA /OV LNR/TM 1327/FL170/TP C510/TB NEG
```
Report
a routine report filed through LNR
Where
over LNR
Time
13:27 UTC
Height
at 17,000 ft
Aircraft
C510
Turbulence
none
P46T at 31,000 ft, 42 nm south, 8:37 am CDT (13:37 UTC): light chop turbulence. 219 nm along the route, 42 nm south of the line.
as filed, and in English
```
ALO UA /OV ALO270005/TM 1337/FL310/TP P46T/TB INTMT LGT CHOP
```
Report
a routine report filed through ALO
Where
5 nm west (270°) of ALO
Time
13:37 UTC
Height
at 31,000 ft
Aircraft
P46T
Turbulence
intermittent light chop
B737 at 35,000 ft, 13 nm northwest, 10:21 am CDT (15:21 UTC): no turbulence. 378 nm along the route, 13 nm northwest of the line.
as filed, and in English
```
SUX UA /OV SUX/TM 1521/FL350/TP B737/TB NEG
```
Report
a routine report filed through SUX
Where
over SUX
Time
15:21 UTC
Height
at 35,000 ft
Aircraft
B737
Turbulence
none
B38M at 39,000 ft, 25 nm southeast, 7:43 am CDT (12:43 UTC): light chop turbulence. 537 nm along the route, 25 nm southeast of the line.
as filed, and in English
```
HSI UA /OV HSI270030/TM 1243/FL390/TP B38M/TB CONS LGT CHOP
```
Report
a routine report filed through HSI
Where
30 nm west (270°) of HSI
Time
12:43 UTC
Height
at 39,000 ft
Aircraft
B38M
Turbulence
continuous light chop

7 more routine reports are on the map.

Winds aloft along the route, and the time en route the forecast for use 14:00–21:00 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 8 forecast points nearest it (GRB, LSE, MCW, OMA, GRI, GLD, DEN, PUB). 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	240° at 23 kt	+22 kt	19 °C	98 kt	8 h 20 min	5:55 pm MDT (23:55 UTC)
6,500 ft	240° at 27 kt	+27 kt	18 °C	93 kt	8 h 46 min	6:21 pm MDT (00:21 UTC)
8,500 ft	240° at 30 kt	+30 kt	13 °C	90 kt	9 h 04 min	6:39 pm MDT (00:39 UTC)
10,500 ft	240° at 32 kt	+32 kt	9 °C	88 kt	9 h 16 min	6:51 pm MDT (00:51 UTC)
12,500 ft	240° at 34 kt	+34 kt	5 °C	86 kt	9 h 29 min	7:04 pm MDT (01:04 UTC)
14,500 ft	240° at 35 kt	+35 kt	0 °C	85 kt	9 h 36 min	7:11 pm MDT (01:11 UTC)
16,500 ft	240° at 36 kt	+36 kt	-5 °C	84 kt	9 h 43 min	7:18 pm MDT (01:18 UTC)
18,000 ft FL180	240° at 36 kt	+37 kt	-9 °C	83 kt	9 h 50 min	7:25 pm MDT (01:25 UTC)
24,000 ft FL240	250° at 46 kt	+47 kt	-21 °C	73 kt	11 h 11 min	8:46 pm MDT (02:46 UTC)
30,000 ft FL300	250° at 63 kt	+62 kt	-31 °C	58 kt	14 h 04 min	11:39 pm MDT (05:39 UTC)
34,000 ft FL340	260° at 70 kt	+69 kt	-37 °C	51 kt	16 h	1:35 am MDT (07:35 UTC)
39,000 ft FL390	260° at 68 kt	+66 kt	-47 °C	54 kt	15 h 07 min	12:42 am MDT (06:42 UTC)

Based on data from the 12th at 12:00 UTC; valid on the 12th at 18:00 UTC for use 14:00 to 21:00 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
GRB	used from 0 nm out; 25 nm from the line	260/10	240/27 16°	260/31 10°	270/25 5°	280/31 -10°	280/35 -22°	270/46 -37°	290/43 -40°	300/64 -48°
LSE	used from 50 nm out; 65 nm from the line	240/16	230/27 20°	250/35 12°	260/28 5°	260/30 -9°	260/37 -21°	260/38 -36°	280/44 -37°	280/52 -47°
MCW	used from 199 nm out; 16 nm from the line	220/19	210/29 20°	230/35 13°	250/35 5°	250/33 -9°	260/44 -21°	260/46 -33°	270/58 -37°	270/59 -46°
OMA	used from 299 nm out; 82 nm from the line	210/23	240/34 20°	230/40 14°	220/43 7°	240/38 -8°	250/47 -21°	270/70 -29°	270/79 -36°	270/68 -48°
GRI	used from 448 nm out; 32 nm from the line		270/26 19°	230/33 13°	230/39 8°	230/43 -9°	240/55 -21°	250/76 -28°	260/84 -36°	260/68 -47°
GLD	used from 597 nm out; 67 nm from the line		240/22	250/24 13°	250/39 6°	230/42 -8°	230/55 -21°	240/87 -30°	240/96 -36°	250/93 -48°
DEN	used from 746 nm out; 56 nm from the line			230/7 11°	230/13 4°	230/40 -9°	230/48 -20°	240/66 -32°	240/88 -38°	230/100 -47°
PUB	used from 796 nm out; 36 nm from the line			250/31 11°	240/42 5°	230/46 -7°	230/59 -20°	240/77 -30°	230/94 -37°	240/95 -49°

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
GRB Green Bay, WI	departure	VFR	from the south-southwest (210°) at 8 knots	10+ mi	none	695 ft	9:53 am CDT (14:53 UTC)
ATW Appleton, WI	20 nm out, 7 nm south of the line, tower	VFR Sky: scattered clouds at 12,000 feet	from the south-southwest (200°) at 8 knots	10+ mi	none	918 ft	14:45 UTC
CMY Sparta, WI	119 nm out, 9 nm north of the line, tower	VFR	from the southwest (220°) at 8 knots	10+ mi	none	839 ft	14:55 UTC
CJJ Cresco, IA	189 nm out, 4 nm east of the line	no report just now				1,279 ft
POH Pocahontas, IA	299 nm out, 6 nm northwest of the line	no report just now				1,225 ft
SUX Sioux City, IA	378 nm out, 18 nm northwest of the line, tower	VFR	from the southeast (140°) at 8 knots	10+ mi	none	1,098 ft	14:52 UTC
BVN Albion, NE	468 nm out, 13 nm north of the line	VFR	from the north-northwest (330°) at 10 knots	10+ mi	none	1,806 ft	15:15 UTC
GRI Grand Island, NE	498 nm out, 24 nm southeast of the line, tower	VFR	from the southwest (220°) at 13 knots	10+ mi	none	1,847 ft	14:53 UTC
MCK Mc Cook, NE	607 nm out, 18 nm south of the line	VFR	from the west (270°) at 13 knots	10+ mi	none	2,582 ft	14:53 UTC
RYA Wray, CO	677 nm out, 12 nm northwest of the line	no report just now				3,677 ft
LIC Limon, CO	756 nm out, 4 nm west of the line	VFR	from the southwest (220°) at 12 knots, gusting to 19	10+ mi	none	5,374 ft	14:55 UTC
COS Colorado Springs, CO	destination	VFR Sky: a few clouds at 10,000 feet	from the south (190°) at 10 knots	10+ mi	none	6,187 ft	8:54 am MDT (14:54 UTC)

The highest airport on this list sits at 6,187 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.

At COS when you get there the forecast at the estimated arrival, 5:55 pm MDT (23:55 UTC)

Wind from the south-southwest at 18 knots, gusting to 28, visibility more than 6 miles, a few clouds at 12,000 feet, scattered clouds at 20,000 feet VFR

The whole forecast for COS

From Mon 9:00 am MDT (15:00 UTC): wind from the south at 10 knots, gusting to 20, visibility more than 6 miles, a few clouds at 20,000 feet
From Mon 1:00 pm MDT (19:00 UTC): wind from the south-southwest at 18 knots, gusting to 28, visibility more than 6 miles, a few clouds at 12,000 feet, scattered clouds at 20,000 feet
From Mon 7:00 pm MDT (01:00 UTC): wind from the south-southwest at 12 knots, visibility more than 6 miles, clear skies
From Mon 10:00 pm MDT (04:00 UTC): wind from the south-southeast at 6 knots, visibility more than 6 miles, scattered clouds at 25,000 feet

The forecast for GRB, the departure

From Mon 7:00 am CDT (12:00 UTC): wind from the south-southwest at 6 knots, visibility more than 6 miles, scattered clouds at 20,000 feet
From Mon 8:00 pm CDT (01:00 UTC): wind from the east-southeast at 3 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 10,000 feet
30% chance between Mon 9:00 pm CDT (02:00 UTC) and 11:00 pm CDT (04:00 UTC): light rain showers, a broken layer at 6,000 feet
From Mon 11:00 pm CDT (04:00 UTC): wind from the south at 4 knots, visibility more than 6 miles, a broken layer at 2,000 feet
From Tue 3:00 am CDT (08:00 UTC): wind from the west at 5 knots, visibility more than 6 miles, scattered clouds at 2,000 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 GRB 6:13 pm CDT (23:13 UTC), at COS 6:23 pm MDT (00:23 UTC) (civil twilight ends 6:50 pm MDT (00:50 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 upper Mississippi valley · loop National Weather Service

Radar now, the northern Rockies · loop National Weather Service

Radar now, the southern Rockies · 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: Green Bay/Austin Straubel International, City Of Colorado Springs Municipal.