Thursday, April 5, 2012

instability pops... (pm.05.apr.12)>

Recent stats:

Tuesday's low/high: 65.0F (18.3C) / 78.4F (25.8C)
Wednesday's low/high: 64.8F (18.2C) / 79.8F (26.6C) - warmest of the year
Thursday's low/high: 61.3F (16.3C) / 78.4F (25.8C)

We've had thunder at some point on every day of this past week, but this afternoon (Thurs) was the first time measurable precipitation occurred.  I recorded 0.48" (1.2cm) of rain roughly between 3:30 and 4:30pm.  That's the most rainfall here since the 13th of March... more than 3 weeks ago.  There were also a few hailstones mixed in with the rain.

Several days back we were talking about how the atmosphere was becoming more and more unstable... due to very warm air remaining entrenched at the surface, while colder air was gradually filtering in aloft.  Despite the fact that there has been no organized storm system, the instability has been building all week long, and today, things finally "popped".  The thunder and lightning were fierce... but it was really nice to get a decent rain... things are looking greener already, and the air is fresh and clean for the first time in a while.

Temporarily cooler air has been brought from high in the atmosphere down to the surface, but it won't last long.  Warm temperatures will return quickly... and remain with us.  There should still be enough instability to generate a few showers and thunderstorms along the mountains during the next several days.  Sunday could be a more stable day, with a lesser chance of flirting with showers and/or thunder.  No really big deal... just be aware of weather conditions (as always) if you are venturing to higher elevations.

THURSDAY NIGHT:
still a chance of a thundershower early... then clearing.
low: 16C (61F)

FRIDAY:
generally sunny in the morning... partly cloudy PM.  a thundershower is possible.
high: 24C (76F)

FRIDAY NIGHT:
evening thundershower risk, otherwise partly cloudy.
low: 17C (62F)

SATURDAY:
a mix of sun and some clouds.  a PM thundershower possible.
high: 24C (76F)

SUNDAY:
sunny to partly cloudy.  warm.
morning low: 18C (64F)
daytime high: 26C (78F)

MONDAY:
partly cloudy... with an increasing chance of a shower or thunderstorm.
morning low: 18C (65F)
daytime high: 26C (79F)

TUESDAY:
partly cloudy with a good chance of a period of thunderstorms.
morning low: 18C (64F)
daytime high: 26C (78F)