Quick Answer
A consistent wind direction shift of 30-40 degrees from east to northeast or southeast can indicate an incoming storm. This shift often precedes a low-pressure system. Observe changes in wind speed and duration for confirmation.
Reading Wind Shifts
When analyzing wind direction, look for a consistent shift of 30-40 degrees from the typical east or southeast direction. This shift is often a sign that a low-pressure system is approaching. A northwest wind shift may indicate a cold front, while a southeast shift may signal a warm front. Monitor wind speed and duration to confirm the trend.
Identifying Storm Indicators
Changes in wind direction can be confirmed with other storm indicators. Look for an increase in wind speed, gusts, and duration. A consistent wind shift often precedes a storm by 6-12 hours. This allows you to prepare and take necessary precautions.
Combining Wind Shifts with Cloud Types
Combine wind shift analysis with observations of cloud types to increase accuracy. Cirrus clouds at high altitudes may indicate an approaching storm, while cumulus clouds may signal fair weather. A layer of altostratus clouds often precedes a low-pressure system. Observe cloud types and wind shifts together for a more accurate forecast.
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