Puna Weather
Sunday 1st March 2026
Today light to moderate east-southeast winds with widely scattered showers and some heavier downpours.
Monday through Wednesday moderate to breezy easterly trade winds with typical windward showers, mostly during the night and early morning hours.
A weak trough is passing by to our north, pulling deeper moisture over us from the southwest (700-300mb moisture chart). The trough is also bringing some instability with cooler temperatures and diverging flow aloft (200mb chart). The trough is too weak to completely stop our trades, so the onshore flow, combined with the instability, has lead to periods of heavier showers from Hilo south.
The enhanced moisture remains overhead through Monday as the surface high that drives our trade winds strengthens (surface chart). This should turn our winds back to easterly and keep the windward showers going, possibly heavy at times.
Mid-level moisture exits the region beginning Tuesday, but the trade winds continue, keeping windward showers in the forecast.
