The Dewpoint Thread (tornado, day, Canada, humidity)
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FORT EUSTIS, Virginia now reporting 87°F Dew point. lol. The 80-82 are believable but not 87.
Also.. A lot of stations are at airports (without shrubs) so I'm sure there's a spot somewhere with a lot of greenery in the southeast that does see DPs in the 80s?
OK, in the end it looks like Eustis and Kingstree were both wrong.
But it looks like the Petersburg one is accurate. At least, there are no obvious signs that it's inaccurate. DP of 80F in VA is not too surprising anyway.
Paulie P discussion with AccuPro. Putting it in this thread since he mentions the dewpoints.
Quote:
Let's break down the next 15 days again by five-day periods and get a better idea of what we are looking at going forward.
July 9-13:
Something I noticed yesterday, but with all of this rainfall from the Plains to the Appalachians, the summer muggies will be on with high dewpoints keeping up temperatures, especially at night. Therefore, what energy is not used during the day may be made up during this 15-day period at night.
Plenty of 70s F showing up during the period with the cooldown across the Great Lakes and Northeast briefly at the start of this weekend.
Take a look at the dewpoints.
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July 14-18:
An upper high in response to a non re-curving storm in the western Pacific will move across the northern Plains, Canada and Great Lakes late in this period between July 15 and 16, which can mean a warmup. European operational is still slow and never really allows the warmup in New England, GFS ensemble shows this change plus a possible intense upper low in the South.
An upper trough moving through the northern Rockies will force out storms and hotter air into the central and northern Plains late in this period. Temperatures will be above normal in the North, near normal in central areas, but still below normal in the southern Plains.
July 19-23:
Nights will be warm across the Tennessee and Ohio valleys with dewpoints mainly in the 70s. However, daytime highs will keep daily averages down.
Texas to Kansas looks dry for the most part, but watch rainfall from the Rockies being pushed out at times.
The Midwest and north-central Plains do not look that cool, unless the upper trough is weaker in the East and more centered west over the Ohio Valley and Midwest.
There may be a surge of heat again, similar to July 15 and 16, across Canada between July 18 and 22. Low confidence past this period to whether a more significant trough arrives after this period or holds off until after July 26. Bering Sea Rule supports second scenario.
The second point is EPO which is positive short range canceling any big north to south trough in the east. But instead, the upper trough cuts underneath with the positive PNA leading to showers and thunderstorms, which was explained in the breakdown above. The cooling may be limited because of cloud cover and higher dewpoints which will keep the nights up.
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