Deciphering Indian Monsoon METAR & TAF Reports: The Aviator’s Guide to Low Level Windshear & CB Clouds
Decode complex meteorological aerodrome reports during the Southwest Monsoon. Learn to identify embedded cumulonimbus, microbursts, and low visibility triggers.
The Dynamics of Monsoon Aviation in India
Operating an aircraft into Mumbai (VABB), Cochin (VOCI), or Delhi (VIDP) during July and August requires a heightened level of meteorological vigilance. The Southwest Monsoon brings torrential precipitation, ceiling drops below 300 feet, and extreme low-level windshear associated with active gust fronts.
Deconstructing an Actual Monsoon METAR
Consider the following raw METAR transmission:
METAR VABB 120830Z 24022G38KT 1200 +TSRA FEW008 BKN015CB OVC060 25/24 Q1002 WS ALL RWY TEMPO 0800 +SHRA BECMG VRB05KT=Let us deconstruct each identifier element:
- 24022G38KT: Wind from 240 degrees at 22 knots, gusting to 38 knots. High crosswind component on Runway 27/09.
- 1200 +TSRA: Visibility restricted to 1,200 metres in heavy thunderstorm with rain.
- BKN015CB: Broken cumulonimbus cloud base at 1,500 feet above aerodrome level. Danger of severe turbulence, hail, and lightning on approach.
- WS ALL RWY: Windshear warning active on all operational runways.
- TEMPO 0800 +SHRA: Temporary fluctuations reducing visibility down to 800 metres in heavy rain showers.
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