“Parade” of Systems
Wednesday 25 March 2009
Expect frequent weather changes over the next week to ten days.
An active pattern has developed due to a “wavy” set-up in the steering level winds.
This means lots of short-wave troughs moving across the nation.
Whereas long-wave troughs (like we had all winter) may persist for a week or more at a time, short-wave troughs move quickly due to their wavelength.
Each one will provide a lifting source; given sufficient moisture we can expect several shots of rain into the early days of April.
Colder air moving in over the weekend, and well south into the Gulf, is likely to leave the first April shortwave with limited moisture. Beyond that, we’ll just have to see how this all plays out.
Bottom line: good moisture potential to put a few more nails in the drought coffin.