Cobb County International Airport-McCollum Field

KRYY

Atlanta, US

Last Updated
Mar 4, 13:50Z

Current Weather

Display Units
Fresh 13 min ago
13:50Z

☀️ Day
LIFR
Flight Rules
13°C
Temperature
Dewpoint: 12°C
4 kt
110°
2 SM
Visibility
400 ft
Ceiling
Above Ground Level
1028 hPa
QNH
Altimeter Setting

Raw METAR

METAR KRYY 041350Z 11004KT 2SM BR OVC004 13/12 A3036 RMK AO2 SLP013 T01280122 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 1,040 ft
OVC 400 ft AGL
☁️
OVC
Overcast (8/8 sky coverage)
400 ft
AGL (Above Ground)
1,440 ft AMSL
QNH
1028 hPa
Sea Level Pressure
For altitude above MSL
QFE
993 hPa
Field Pressure
Height above aerodrome (1,040 ft)
Pressure Alt
598 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 608 ft
ISA Deviation: +0.1°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KRYY 041140Z 0412/0512 07004KT 6SM BR OVC008 TEMPO 0412/0414 2SM BR OVC002 FM041400 15004KT P6SM BKN008 OVC015 FM041600 17005KT P6SM BKN025 BKN070 FM041800 17006KT P6SM SCT035 SCT120 FM050900 16004KT 6SM BR SCT010 TEMPO 0510/0512 BKN006
Upcoming Changes (Next 12 Hours)
14:02Z BASE
+0h
IFR 70° 4 kt
Visibility: 6SM
Ceiling: 800 ft
Mist
16:00Z FM041600
+2h
MVFR 170° 5 kt
Visibility: >6SM
Ceiling: 2,500 ft
18:00Z FM041800
+4h
VFR 170° 6 kt
Visibility: >6SM

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
Chart Features
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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
RYY
09 ✈️
27

Runway Information

Runway Length Width Surface Heading Wind Component
✈️ 09/27
Active: 09
6,305 ft 75 ft ASP 88°
3.8 kt 1.4 kt
20° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KRYY

4,581 observations | Sep 2025 - Mar 2026

Flight Rules Distribution

VFR
69.9%
MVFR
14.8%
IFR
8.8%
LIFR
6.5%

Cobb County International Airport-McCollum Field typically experiences VFR conditions 69.9% of the time, though instrument-rated pilots will find IFR weather present approximately 15.3% of observations. Prevailing winds are from the W averaging 6.8 knots. Calm conditions occur 34% of the time. Temperature extremes range from -12°C to 32°C, reflecting significant seasonal variation. The best months for VFR flying are October, September, November.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 6.8 kt
Maximum Recorded: 20 kt
Calm Winds: 34%
Direction Distribution:
N
2.3%
NE
1.2%
E
13.6%
SE
3.5%
S
4.5%
SW
10%
W
17.4%
NW
13.5%

Temperature Range

Average: 12.3°C
Range: -12°C to 32°C
-12°C 32°C

Visibility

Average: 9.2 SM
Below 3 SM: 2.2%
Fog Frequency: 1.1%

Best Months for VFR

October September November

Runway Wind Analysis

Runway 09/27
Favorable wind: 100%
Avg crosswind: 3.1 kt

Statistics computed from 4,581 METAR observations (Sep 2025 - Mar 2026). Data sourced from official aviation weather services. Updated daily.

Cobb County International Airport-McCollum Field - Airport Information

Airport Details

ICAO Code: KRYY
Type: medium airport
Status: active
Elevation: 1,040 ft MSL

Location

City: Atlanta
Country: US
Latitude: 34.013160°
Longitude: -84.597210°
Time Zone: Etc/GMT+6

Runway Information

Runway 09/27
Length: 6,305 ft
Width: 75 ft
Surface: ASP
ILS: No

About Cobb County International Airport-McCollum Field

Overview

Cobb County International Airport-McCollum Field serves the metropolitan Atlanta area as a medium-sized airport located at 1040 feet mean sea level. Situated at coordinates 34.013160, -84.597210, the airport provides critical general aviation infrastructure for the northwestern suburban region of Atlanta.

Flying Conditions

Weather conditions at McCollum Field predominantly support visual flight rules (VFR), with 70.7% of observations indicating clear conditions. Pilots can expect significant seasonal variability, with temperatures ranging from -8°C to 32°C and average temperatures around 13.1°C. October, September, and November consistently offer the most favorable flying conditions.

Notable Features

The airport features a single runway (09/27) extending 6,305 feet with an asphalt surface. Wind patterns are predominantly western, averaging 6.6 knots with calm conditions occurring 35.7% of the time. The runway alignment demonstrates excellent wind compatibility, with 100% favorable wind coverage and an average crosswind component of just 2.9 knots.

Approach Considerations

Visibility at McCollum Field averages 9.3 statute miles, with only 2.4% of observations reporting visibility below 3 miles. Pilots should anticipate potential reduced visibility during 1% of observations with fog present. The consistent western winds and long runway provide reliable approach and departure conditions for most aircraft operations.

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.