re: Tropical Storm Isaias - O Canada!

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Only a slight difference...

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that 40 mb change in pressure is quite significant

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Philip Klotzbach
@philklotzbach
Seasonal forecast from @ColoradoStateU increased & now calls for extremely active 2020 Atlantic #hurricane season: 24 named storms (including 9 that have already formed), 12 hurricanes (including 2 that have already formed) & 5 major (Cat 3+) hurricanes:

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It’s been 8 quiet days around this thread. Which is a good thing. Figured this comment I found by someone I follow was interesting and maybe someone can add to that discussion

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What the Sonoran heat ridge means to you.

I notice that in national media attention is rarely given to key atmospheric features, outside of a few "favorites" recognized by the general public. You will hear of the dreaded "polar vortex" (that issue is for another day), El Nino/La Nina (but hardly ever negative/neutral ENSO) and the Bermuda High. But what of other signatures such as the Sonoran heat ridge, or the 500MB weakness (scheduled to take
the closed subtropical high in the West takes its name from the desert of the same name. When this ridging develops, power usage will go through the roof in California, the Southwest and Texas. The bad news is that forecast guidance keeps this sulfurous beast in play through at least August 22.

So as the western states bake (CAISO people, this means you), rain and thunderstorms hold the line on temperature over much of the eastern 1/2 of the nation. The heat ridge over the western Atlantic Ocean builds back into the Eastern Seaboard, but never really links with its counterpart over the West. The gap between the two could serve as a conduit for one of the impulses in Mexico or from the "Cape Verde" waves.

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