Cobb County International Airport-McCollum Field

KRYY

Atlanta, US

Last Updated
Jun 10, 13:50Z

Current Weather

Display Units
Recent 49 min ago
13:50Z

☀️ Day
VFR
Flight Rules
24°C
Temperature
Dewpoint: 22°C
4 kt
160°
10 SM
Visibility
4,900 ft
Ceiling
Above Ground Level
1021 hPa
QNH
Altimeter Setting

Raw METAR

METAR KRYY 101350Z 16004KT 10SM SCT020 OVC049 24/22 A3016 RMK AO2 SLP202 T02440222 $

Clouds - Visual Profile

12,000ft
9,000ft
6,000ft
3,000ft
Ground
Field Elev: 1,040 ft
SCT 2,000 ft AGL
OVC 4,900 ft AGL
SCT
Scattered (3/8-4/8 sky coverage)
2,000 ft
AGL (Above Ground)
3,040 ft AMSL
☁️
OVC
Overcast (8/8 sky coverage)
4,900 ft
AGL (Above Ground)
5,940 ft AMSL

Weather Briefing

VFR

Cobb County International Airport-McCollum Field is currently reporting visual flight rules (VFR) conditions with overcast skies at 4,900 feet and 10 SM visibility.

Wind Analysis

Winds are from the south-southeast (160°) at 4 knots.

Visibility & Ceiling

Visibility is 10 SM. The ceiling is 4900 feet AGL (overcast), well above standard VFR minimums.

Temperature & Moisture

Temperature is 24°C (75°F) with a dewpoint of 22°C. The temperature-dewpoint spread is very narrow, indicating saturated or near-saturated air. Fog formation or low cloud development is likely.

Forecast Outlook

The TAF forecast covers the next 24 hours. Conditions are expected to fluctuate between VFR and MVFR. VFR pilots should be prepared for deteriorating conditions. Expected weather includes: Mist.

Pilot Recommendations

Conditions are favorable for visual flight. The narrow temperature-dewpoint spread creates risk of fog formation, particularly during evening and early morning hours. The forecast indicates conditions may deteriorate. Ensure you have fuel reserves and a viable alternate airport.

This briefing is generated from real-time METAR and TAF data. Always verify with official sources before flight.

QNH
1021 hPa
Sea Level Pressure
For altitude above MSL
QFE
986 hPa
Field Pressure
Height above aerodrome (1,040 ft)
Pressure Alt
808 ft
QNE Reference
Standard: 1013 hPa
Density Altitude: 2,138 ft
ISA Deviation: +11.1°C

Forecast (TAF)

View Full TAF
Raw TAF
TAF KRYY 101124Z 1012/1112 00000KT 5SM BR SCT003 BKN040 FM101400 24004KT P6SM SCT035 SCT070 FM110100 21003KT P6SM FEW050 SCT250
Upcoming Changes (Next 12 Hours)
14:39Z BASE
+0h
MVFR
Visibility: 5SM
Ceiling: 4,000 ft
Mist
01:00Z FM110100
+11h
VFR 210° 3 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
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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°
1.4 kt 3.8 kt
70° angle
🟢 Active Runway: Best headwind component for current conditions
⬆️ Headwind: Favorable wind component
↔️ Crosswind: ≤10kt Safe, 11-15kt Caution, >15kt Challenging

Weather Statistics - KRYY

7,341 observations | Sep 2025 - Jun 2026

Flight Rules Distribution

VFR
72.3%
MVFR
13.9%
IFR
8.7%
LIFR
5.1%

Cobb County International Airport-McCollum Field typically experiences VFR conditions 72.3% of the time, though instrument-rated pilots will find IFR weather present approximately 13.8% of observations. Prevailing winds are from the W averaging 6.7 knots. Calm conditions occur 33.7% 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, April.

Wind Analysis

Prevailing Direction: W (270°)
Average Speed: 6.7 kt
Maximum Recorded: 20 kt
Calm Winds: 33.7%
Direction Distribution:
E
13.8%
N
2.1%
S
5.9%
W
15.6%
NE
1.1%
NW
12.2%
SE
4.6%
SW
11.2%

Temperature Range

Average: 14.9°C
Range: -12°C to 32°C
-12°C 32°C

Visibility

Average: 9.4 SM
Below 3 SM: 1.8%
Fog Frequency: 0.8%

Best Months for VFR

October September April

Runway Wind Analysis

Runway 09/27
Favorable wind: 100%
Avg crosswind: 3.2 kt

Statistics computed from 7,341 METAR observations (Sep 2025 - Jun 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.