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Project Status - 21 Mar 2007

Weather Status: To wrap up the weak event yesterday, the trough did produce some scattered afternoon showers and thunderstorms that produced some moderate precipitation in the Central Valley. Blue Canyon had a few hundredths out of an afternoon shower. Focus for today is a system due to impact the ARB on Mon-Tues (Mar 26-27). If systems maintains its forecast strength HMT will be extended to capture the event. Flow by the weekend is predicted to be more zonal with a weak but well defined moisture plume and good wind speeds at 700mb. Most precipitation by the GFS appears to be frontal. The storm will have abundant cold air so snow levels may be low for March. Liquid amounts look like 1-2 inches, but this appears to be a downward trend relative to earlier progs. Timing is pretty consistent within the GFS ensemble, but the ECMWF is slower by 24 hrs. Timing on event looks like first raindrops at 18GMT on Mon (Mar 26) and ending Tues at 12GMT. So another brief event. Storm is still a monitoring target so we'll update the prospects tomorrow.

System Status: ALPS timing tests were completed for the RFC and RNO, still some problems with SAC. MRY will be done tomorrow.

John McGinley, GSD


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