Henry Post Army Air Field

KFSI / FSI

Fort Sill, US

Last Updated
Mar 4, 22:20Z

Military Airport

Restricted

This is a U.S. military installation. Civil aircraft operations are generally prohibited without prior authorization.

Access Notes:

Most military airfields closed to civil traffic; some joint-use exceptions exist

Consult official AIP (FAA AIP GEN 3.3) for current access procedures and restrictions.

Current Weather

Display Units
Fresh 29 min ago
22:20Z

🌙 Night
IFR
Flight Rules
12°C
Temperature
Dewpoint: 11°C
7 kt
360°
10 SM
Visibility
500 ft
Ceiling
Above Ground Level
1014 hPa
QNH
Altimeter Setting

Raw METAR

SPECI KFSI 042220Z AUTO 36007KT 10SM OVC005 12/11 A2995 RMK AO2 SLP140 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 1,189 ft
OVC 500 ft AGL
☁️
OVC
Overcast (8/8 sky coverage)
500 ft
AGL (Above Ground)
1,689 ft AMSL
QNH
1014 hPa
Sea Level Pressure
For altitude above MSL
QFE
974 hPa
Field Pressure
Height above aerodrome (1,189 ft)
Pressure Alt
1,167 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 1,092 ft
ISA Deviation: -0.6°C

24-Hour Weather Evolution

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Data Sources
  • • Current conditions from METAR observations
  • • Historical data from past 24 hours
  • • No forecast or predicted data included
  • • Data updated with each new METAR report
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Note: Future values beyond current TAF validity are estimates based on climatological data and trends. Always verify with current forecasts before flight operations.

Airport Runway Layout

N
FSI
17
35 ✈️

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 17/35
Active: 35
5,000 ft 200 ft CON 179°
6.9 kt 1.2 kt
10° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KFSI

1,526 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
90.4%
MVFR
6%
IFR
2.2%
LIFR
1.3%

Henry Post Army Air Field enjoys predominantly VFR conditions, with visual flight rules prevailing 90.4% of the time. Prevailing winds are from the S averaging 8.5 knots. Calm conditions occur 29.6% of the time. Temperature extremes range from -10°C to 37°C, reflecting significant seasonal variation. The best months for VFR flying are March, January, February.

Wind Analysis

Prevailing Direction: S (180°)
Average Speed: 8.5 kt
Maximum Recorded: 20 kt
Calm Winds: 29.6%
Direction Distribution:
N
20.5%
NE
5.5%
E
1.2%
SE
6.2%
S
25.2%
SW
7.6%
W
2.9%
NW
1.2%

Temperature Range

Average: 15.6°C
Range: -10°C to 37°C
-10°C 37°C

Visibility

Average: 9.9 SM
Below 3 SM: 0.1%
Fog Frequency: 0.5%

Best Months for VFR

March January February

Runway Wind Analysis

Runway 17/35
Favorable wind: 100%
Avg crosswind: 3.4 kt

Statistics computed from 1,526 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

Henry Post Army Air Field - Airport Information

Airport Details

ICAO Code: KFSI
IATA Code: FSI
Type: medium airport
Status: active
Elevation: 1,189 ft MSL

Location

City: Fort Sill
Country: US
Latitude: 34.649799°
Longitude: -98.402199°
Time Zone: Etc/GMT+7

Runway Information

Runway 17/35
Length: 5,000 ft
Width: 200 ft
Surface: CON
ILS: No

About Henry Post Army Air Field

Henry Post Army Air Field is a military facility. Civilian access may be restricted or require Prior Permission (PPR). Pilots should consult the US AIP for current access procedures and restrictions.

Overview

Henry Post Army Air Field serves as a critical aviation facility located at Fort Sill in Oklahoma, supporting military aviation operations. Situated at an elevation of 1189 feet MSL, the airport provides essential infrastructure for Army aviation training and support missions in the region.

Flying Conditions

Pilots can expect predominantly favorable Visual Flight Rules (VFR) conditions at this airport, with VFR conditions present 87.2% of the time. Temperature ranges from -5°C to 37°C, creating varied seasonal flying environments, with January, September, and November offering the most consistent VFR conditions. Wind patterns are predominantly from the south at an average of 8.2 knots, with calm conditions occurring 31.3% of the time.

Notable Features

The airport features a single concrete runway (17/35) measuring 5000 feet in length, capable of supporting medium-sized aircraft operations. Its geographic location and terrain suggest a relatively stable aviation environment with consistent wind patterns and good visibility averaging 9.9 statute miles. The airport experiences minimal low visibility conditions, with fog occurring only 1% of the time and less than 3 miles visibility in just 0.1% of observations.

Approach Considerations

Runway 17/35 offers favorable wind conditions 100% of the time, with an average crosswind of only 3.5 knots. Pilots should anticipate predominantly southern winds during approach and be prepared for potential light crosswind conditions. The consistent weather patterns and good visibility make this airport generally accessible for most standard approach procedures.

Data Sources & Accuracy: Airport information sourced from OurAirports.com, a collaborative database of worldwide airport data. Weather data from official aviation weather services including NOAA Aviation Weather Center and international METAR/TAF providers. Information is updated regularly but pilots should always verify current conditions and NOTAMs through official channels before flight operations.

Official Data Sources

Weather NOAA Aviation Weather Center • International METAR/TAF Network
Airports OurAirports.com • Public domain airport database
NOTAMs FAA NOTAM System • ICAO NOTAM Distribution
Last updated: Jan 1, 1970 12:00 AM UTC

Disclaimer: Data is provided for informational purposes only. Pilots must verify all information through official sources before flight operations. Weather conditions change rapidly; always obtain a current briefing from approved weather services.