What a difference 2 weeks make...Warsash Spring Series - 15th April

SYNOPTIC SITUATION
An unusual Arctic airflow covers the UK as a col has formed to the west. The result is a NNE airflow with no imminent change expected. Unstable to day time temperatures further cloud development and possible showers are expected though the risk of thunderstorms is expected to remain LOW

Air Temperature: 08-10 Celsius, wind chill 05-06 Celsius

Weather: Small amounts of cloud and early mist/haze. As temperatures increase expect increasing cloud and and possible showers from 1300

Portsmouth HW 0720 LW 1308

KEY POINTS
- Feels cold with wind
- unstable offshore conditions: short period shifts 2-4 mins up to 20 deg, gusty conditions
- slight trend left but shifts will dominate and land effects funnelling the wind out of Southampton Water
- strongest breeze likely on white group course
- decreasing breeze, slow trend left with lighter wind- quick shift right with stronger breeze

Time	Wind Direction	Wind Speed (KNOTS)	Comments
0900-1100	360-030	14-18	Wind speed increasing through thee range as mist clears- could be as light as 08 KT to begin with
1100-1300	360-020 backing 340-010	16-18 decreasing 12-16	Wind decreasing and then backing. Cumulus developing inland
1300-1500	340-010	12-16	Broken cloud spreading in
1500-1700	340-010	10-14	Little change slight decrease in surface wind with extensive cloud cover