Thursday Update

Good Afternoon,

Here are a few highlights of what’s going on in the west today.

Water Supply

Hydro Reservoir – Current

With Libby remaining as one of the last reservoirs that’s still rising, let’s take a look at where exactly it lies it terms of a normal year.  At 2,446.3, Libby is three feet above the 10-year minimum, four feet below average (though that delta is quickly shrinking), and 13.5 feet below the 10-year max.

Realtime Hydro Chart

Though, the realtime hydro chart suggest the fill is slowing down as flows have dropped 10% week-on-week.

Historical Reservoir Levels

At 92% capacity, Libby is almost identical to 2016, ahead of 2015 (which had already crested by at this point), and 3% points behind 2014 which peaked at 96% on the 26th of July.


Mid-C Loads

Mid-C loads fell 1,060 MW week-over-week as temperatures have come off moderately.  This also closed the gap with 2016, now just a difference of 1,300 MW compared to upwards of 2,100 MW last week.

SP-15 Loads

SP-15 loads moved nearly 600 MW week-on-week, though remain down more than 2,000 MW from peak demand on the 7th.  The daily average is 800 MW higher than the two-week average, largely thanks to lowered demand from two weeks ago.

Palo Verde Loads

With the end of 115+ days in Phoenix, demand followed suit and has come off 937 MW week-on-week, and 1,800 MW from the high on the 7th.  The small drop in temps also has dropped the daily average to match the two-week average at 12,150 MW.


Spokane Weather

Spokane’s forecast plummets from the high 90’s back to normal (mid-80’s) from today to the weekend before bouncing back into the upper 90’s and new 10-year highs.  The forecast peaks at 97, ten degrees above normal.  There is just one day in July forecasting below normal, and it is so far out (28th), that you shouldn’t count on it holding true.

Seattle Weather

Seattle is basically the opposite as cooler-than-normal highs should stay in the area through the 20th.  The 18th and 19th are now forecasting in the low 70’s, up to 7 degrees cooler than yesterday’s forecast.  There is potential for a foray back into the 80s by the end of next week, but no serious heat (for Seattle) until the end of the month.

San Jose Weather

San Jose dropped four to six degrees moving into the early part of next week, and making another trip below normal in the process.  No 90 degree days in the forecast other than a small blip on the 29th (which is a considerable increase from yesterday’s forecast).

Phoenix Weather

In a big change from yesterday, the Phoenix forecast dropped 8 degrees on the 17th, pushing the high just 3 degrees above double digits, and four degrees below normal.  From there, the trend looks cooler through the month and stays mostly below normal until August.

Natural Gas

Natural Gas Nodes – Demand Daily

Gas Demand in Mid-C his increased 250 MMCF since the 4th, though down 70 MMCF from its high on the 9th.

Palo Verde

Gas demand is up 260 MMCF since the 2nd in PV, but decreased day-over-day by 80 MMCF.


SP-15 Solar Generation

Solar generation reached 5,925 MW yesterday, the second highest total for the week, and an increase of 400 MW day-over-day.

Renewable Blend

Add in SP-15 wind and the renewable generation in total increased nearly 1,400 MW in total day-over-day.


Transmission Mid-C to NP

Mid-C to NP saw its daily average drop 200 MW day-over-day thanks in part to two sharp drops in flow earlier this morning.  Nonetheless, flow remains elevated compared to last week as the weekly average now sits at 3,925 MW, upwards of 600 MW above last week.

Transmission – MidC to BC

Southward flow continues with no end in sight as flow peaked at 960 MW yesterday just after bottoming out at -2128 MW hours before.  Yesterday’s daily average did manage a 120 MW increase over the weekly average.


Have a great rest of your week,