Hazardous Conditions: Spring

• The spring transition is marked by a sharp decrease in cloudiness and precipitation due to decreased Polar Front activity. Half of the days are mostly clear (0 to 2/8 cloud cover).

• Mean monthly precipitation, 1.53 inches, occurs on an average of 9 rain days per month.

• Thunderstorms average 1.5 days per month.

• The prevailing westerlies are firmly established, averaging 7 knots with a diurnal range of 6 knots. Sustained winds of gale force have never been recorded during the spring, but maximum gusts, usually associated with fronts or thunderstorms, have occasionally exceeded 40 knots.

• Temperatures increase during this transition period, with increasing diurnal ranges (up to 19°F). The mean seasonal temperature is 63°F. Mean and maximum temperatures for each month reflect the rising trend.