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July Medium/ Long Range


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Spoke to soon about heat not reaching extreme levels, there is a possibility we go higher than 95 degrees, however, at this time it appears the highest air temps will be North of us, where the Euro has 100 + heat . It goes without saying that dew points are going to soar again, along with thunderstorm potential.

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I posted this in the Discobs thread, but it really belongs here.

Ensemble guidance is still advertising a shift in the longwave pattern with the upper ridge retrograding into the central/western US for the end of the month into August. That should at least give us some drier air if not notably less hot. That pattern could also put our area in a position for impacts from mesoscale convective systems that develop on the periphery of the ridge and drop southeastward.

 

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The Euro weeklies and GEFS extended have broken a several week qp agreement toward August as they have consistently agreed on above normal precip for Virginia.  The Euro has now shifted toward drier than normal. 

They both agree on a 500 mb. heat dome centered on Texas, NM and OKL.  But, the Euro is east centered compared to 10 days ago. This eliminates any attached troughiness with a dominate NW flow. 

A dominate NW flow is usually drier than normal, especially for western areas without an attached trough upstream, because it puts us in the rain shadow of the mts.

If this upper heights pattern verifies, I would have to lean in the direction of the Euro for the next 30 days. 

I have received 4.47"  during the first 21 days of July compared to a normal 2.94" thru 21 days.  152% of normal.

August may flip if the Euro is correct.

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6 hours ago, CAPE said:

^Still looks like an h5 ridge develops in the central/western US in the LR, so it is debatable how much heat returns even after the cool shot associated with the digging eastern Canada trough lifts out.

Appears rain chances are decreasing as a result of this overall pattern change.  

 

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8 hours ago, high risk said:

The cooldown for the first weekend in August looks legit - very strong ensemble agreement across modeling systems.

EPS has next Friday through the end of the run BN. I’m guessing that duration gets shortened, but looks like a gorgeous weekend at least! Going to make the inevitable late August/early September heatwave even more frustrating lol

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10 hours ago, high risk said:

The cooldown for the first weekend in August looks legit - very strong ensemble agreement across modeling systems.

Salivating.... this has been a tuff summer down here for outside work. I put in my time no matter what but there is no way to fully "get used to" the level of soup that has been dominating the weeks since early June. 

Been tracking this pattern flip closely and making work plans. A 5 consecutive day break from relentless 70+ dews will be a lotto for me. The last few days have been nice but 3 days out of 30 doesn't really do much for my mental state lol

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Ens guidance continues the idea of h5 ridge building out west for early August. For now it looks like we see below avg temps the first few days of the month then probably moderating to around avg. Could be some storms in the Aug 5-7 period if the GFS has the right idea, with some energy digging southward as the western ridge amplifies.

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From the WPC 

Day 6 to 7

By Wednesday and especially Thursday the cold fronts slowly pushing south could provide a focus for enhanced rain amounts in the East, which will be refined in future forecasts.

 

1441662808_97ep48iwbg_fill(15).gif.41258e502e87fca9504e59742d8f5e4d.gif

 

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2 hours ago, frd said:

From the WPC 

Day 6 to 7

By Wednesday and especially Thursday the cold fronts slowly pushing south could provide a focus for enhanced rain amounts in the East, which will be refined in future forecasts.

 

1441662808_97ep48iwbg_fill(15).gif.41258e502e87fca9504e59742d8f5e4d.gif

 

That would be the front associated with the trough digging southeastward from Canada. Storms are likely along the front and there could be some surface low development. Remains to be seen if it's a quick line of scattered storms for our region with a cooler more refreshing airmass pushing in quickly behind it, or if SLP development along the front slows it a bit with a more prolonged period of rainfall. Still 5-6 days out.

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59 minutes ago, CAPE said:

That would be the front associated with the trough digging southeastward from Canada. Storms are likely along the front and there could be some surface low development. Remains to be seen if it's a quick line of scattered storms for our region with a cooler more refreshing airmass pushing in quickly behind it, or if SLP development along the front slows it a bit with a more prolonged period of rainfall. Still 5-6 days out.

 

Yes, will be cool to see how it unfolds. 

meanwhile Accuweather on the cool down bus. 

 

BigCoolArrivalNxWk25Jul.webp.473570a7560cf45e81f84059eddc41eb.webp

 

 

 

 

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