95% of what Ed describes goes over my head, but I do like his most recent post:
http://weatherclimatelink.blogspot.com/
"Synoptically for the USA, and most numerical models are doing a reasonable job into days 5-7, another western states split flow closed low is likely next week. Afterward (roughly week-2), this split flow should consolidate while the “northern branch ridge†retrogrades. Hence there is likely to be a period of an east <?XML:NAMESPACE PREFIX = ST1 /><ST1

LACE st="on">Pacific Ocean</ST1

LACE> trough-western states ridge and so forth. Perhaps similar to many episodes during spring 2008, ~weeks 3-4 a resumption to strong but progressive western and central <ST1:COUNTRY-REGION st="on"><ST1

LACE st="on">USA</ST1

LACE></ST1:COUNTRY-REGION> troughs may resume.

Should we go back to that northward shifted but active storm track, drought may return/intensify across the southern <ST1:COUNTRY-REGION st="on"><ST1

LACE st="on">USA</ST1

LACE></ST1:COUNTRY-REGION> once again. Speculating farther into summer, should this La-Nina situation linger and excursions into octants 4-5 of GWO phase space occur, like summer 2008, there may be episodes of anomalous heat contributing to elevated fire dangers across the western states. Other weather ramifications, nationally and internationally, should be understood. For instance, more western <ST1:COUNTRY-REGION st="on">USA</ST1:COUNTRY-REGION> “trough attacks†are likely to make the storm chasers happy across the Plains...."