31 / 13

RWY 31/13

HDG 302°

LEN 5,000 ft

Grant County Airport

Runway 31 at KW99

Runway 31/13 at Grant County Airport (KW99) in Petersburg is a 5,000 ft, lighted, asphalt runway oriented 302°/122°. The runway is 75 ft wide. SkyMeter has observed 32 landings and 0 departures on this runway over the last 30 days, with approximately 0.0% of arrivals resulting in a go-around. Trace data shows an average final-approach slope of 1.1°, a typical touchdown ground speed of 119 kt, a 2.1 kt average crosswind component.

Last 30 Days

32 Operations

0 Deps / 32 Arrs

Runway at a Glance

Arrival Volume

32 landings observed on Runway 31 in the last 30 days, alongside 0 departures.

Peak Hour

Busiest landing window observed at 15:00 with 12 arrivals on the recent sample.

Prevailing Wind & Gust History

Over the past 365 days, winds at KW99 have prevailed from the west (270°), accounting for roughly 18% of windy observations. Average wind speed sits at 4.3 kt with peak gusts to 51 kt. Strong-wind days are infrequent here.

Light Crosswind Component

Average crosswind on landing is 2.1 kt at touchdown, measured against runway 31 alignment.

Approach Slope

Final-approach slope averages 1.1° on Runway 31, shallower than the standard 3°.

Landing Behavior and Touchdown Performance

The metrics below are computed from ADS-B trace data observed at Runway 31 over the last 30 days. Each value is shown only when at least 10 valid samples were available; sparse cells are hidden rather than estimated.

Avg approach slope

1.1°

Avg touchdown GS

119 kts

Avg headwind

0.7 kt

Hourly Landing Distribution

00:00 3 landings

01:00 4 landings

02:00 3 landings

11:00 3 landings

12:00 2 landings

13:00 2 landings

14:00 4 landings

15:00 12 landings

16:00 7 landings

18:00 3 landings

19:00 7 landings

Recent observed landings on Runway 31 grouped by hour-of-day (UTC).

Approach Types and Categories

Aircraft approach runways using different procedures based on weather conditions, visibility, and available navigation equipment. An Instrument Landing System (ILS) approach provides precision horizontal and vertical guidance using ground-based radio signals, enabling aircraft to land in low visibility conditions. Visual approaches require pilots to maintain visual contact with the runway and surrounding terrain, typically used during clear weather. Area Navigation (RNAV) approaches use GPS technology to guide aircraft along specific flight paths.

Approach Categories Explained

Category (CAT) classifications define minimum visibility and decision height requirements for instrument approaches. Higher categories enable operations in lower visibility conditions.

CAT I

Decision Height: 200 ft

Visibility: 550m

CAT II

Decision Height: 100 ft

Visibility: 300m

CAT III

Decision Height: 0-50 ft

Visibility: 0-200m

Visual

Clear of Clouds

Visibility: 5 km

Wind and Environmental Factors

Wind conditions directly impact runway operations, influencing approach difficulty, landing performance, and runway selection. Runway 31 benefits from favorable wind alignment, with prevailing winds creating minimal crosswind components for most operations. Average wind speeds of 12 knots pose no operational constraints for commercial aircraft.