While there may be a major shot of late season arctic air heading south into the Northeast, there is however a sign of the fast approaching summer season in South Texas today. McAllen topped out at 100 degrees, a full 6 degrees over the previous record and I believe this may well be the first 100 of the year throughout the US.

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The point to this evening’s rather late post however is the large uncertainty beyond 7 days. Yesterday I showed you the potential of what this cold may have to offer but today I look to see what may follow. It’s not clear cut.

The EPS Control how a horseshoe of positive from Alaska to Greenland which locks in a cold eastern trough beyond the 6-10.

GFS ensemble, though has a positive and not negative from Alaska to Greenland, has more positive further south.

Lot’s of uncertainly as to how long the cold lasts and whether there’s a surge of summer to follow.

More tomorrow but be sure to watch today’s video.

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