Tuesday Update

Good Afternoon,

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


SP15 Loads

SP-15 loads increased compared to the weekend as expected, but remain down heavily compared to all of last week.  The seven-day difference amounted to a 2,322 MW decline at its peak, and the daily average fell 897 MW below the weekly average.  On the other hand, year-on-year demand is up by 564 MW, marking the first time in over a week that we’ve seen an annual increase.

Mid-C Loads

Mid-C demand has stayed relatively calm compared to the highs we saw last week as loads pushed north of 22,000 MW.  Week-on-week demand is down 757 MW, but finished up nearly 2,000 MW year-on-year as of yesterday.  Yesterday’s daily average finished nearly identical to the weekly average at 18,619 MW.

Palo Verde Loads

With daily highs finally dropping out of the upper 100s and finishing in the 90s, PV demand has followed suit with a daily average yesterday 1,961 MW lower than exactly one week prior.  Peak demand fell sharply as well with loads falling 3,327 MW week-on-week.

NP-15 Loads

NP demand recovered yesterday with a day-on-day increase of nearly 900 MW, but still fell 2,300 MW short of the week-on-week high.  2016 continues to show higher peak demand though that gap decreased slightly yesterday as the difference was 1,400 MW compared to upwards of 2,800 MW difference we saw last week.  The daily average fell below the weekly average for the third consecutive day.


Current Weather Summary

We don’t see this very often.  Every station that Ansergy observes is projecting warmer than normal average-temps over the next 10 days.  The largest anomalies should take place in NP-15 where all four stations are pacing 5 degrees above normal or higher.  SP-15 is slightly cooler than NP-15 in terms of anomaly, but still well north of 3 degrees.

Sacramento Weather

Sacramento looks like it can set a new 10-year high on the 16th at 100 degrees, and though that might be the only new record, it should continue to warm up over the following two days.  At 102 (14 degrees above normal), the 17th is looking like the hottest day of the month.  Sacramento is forecasted stay above 90 until July.

San Jose Weather

It’s not nearly as hot in San Jose, but the separation from normal is still there.  Temps should peak at 89 by the 17th putting the area 12 degrees above normal.  From there we’ll see a slight dip as temps fall back into the low 80s marking a change from yesterday’s forecast which was seven degrees warmer on the 20th.  San Jose will stay above normal until the 26th of June.

Burbank Weather

Similar forecast in Southern California as well as Burbank is preparing for another foray into the 90s.  Thursday is expecting a high of 92, good enough for a new 10-year high for that date.  Temps will make a brief dip back into the 80s on the 18th before again reaching into the 90s, this time hitting 95 on the 20th (four degrees warmer than forecasted yesterday).

Palm Springs Weather

Interior Southern California has one last day in the double digits before taking on the full brunt of summer and an eventual high of 116 by the 19th.  This is still somehow short of the 10-year high (118), but comes in 13 degrees above normal, and six degrees above yesterday’s forecast.

Phoenix Weather

The Phoenix forecast was increased a few degrees at the tail end of this week where we could see consecutive days at 117 degrees, and three consecutive days of new 10-year highs.  Today marks the last day of sub-100 degree highs, and the last day below normal until July.

Seattle Weather

Seattle on the other hand will likely get a few heating days before reaching above normal by the 18th, but even that only entails three days in the 70s.  The high of 75 on the 20th is currently marking the warmest day for the rest of June and moving into the first week of July.  Thursday’s low of 60 comes in at 10 degrees below normal.

Denver Weather

One more city to note as Denver is set to reach daily highs in the 90s for at least a week, and what could be upwards of two weeks beginning on the 16th.  A couple changes from yesterday as most days from the 16th – 20th are trending a few degrees cooler.

Water Supply

Hydro Rivers Current

The Spokane River dropped below 10,000 CFS for the first time over the weekend and currently sit at 6,800 CFS, just 44% of where the river was 10 days ago and nearly 5,000 CFS below average for this time of year.


The Mid-Columbia Sideflows showed their signs of slowdown with a steep drop beginning on the 9th where we saw flows go from 44,000 CFS to 29,000 CFS, a drop of 34% in just four days.  With no heat waves in sight, we should expect that number to make a steady decline through August.

Sideflows-Mid-Columbia Historical

The Sideflows’ high of 60,337 CFS on June 2nd marked the highest flow this decade and was followed by what looks like maybe the sharpest decline of the decade as well.  The 29,000 CFS recorded today is still well ahead of all years other than 2011.

NW River Forecast

The 10 Day River Forecast is showing a high of 28,264 on the 14th followed by a smooth decline through the remaining forecast.  This is a small decrease from yesterday and is also reflected in the rest of the 10 days as well.  STP remains well above the 10-day forecast.


ISO Major Unit Outages Chart

Total ISO gas outages increased over the weekend after marking a three-month low of 3,538 MW on the 8th, and now sit at 4,387 MW, still well below the year-long high of 12,178 MW from May.  Hydro outages also increased over the weekend, adding another 200 MW, while Solar saw 110 MW return online.


Transmission – MC-NP

Sunday marked huge swings in flow as the MC-NP line began the day at 3650 MW before dropping to 1531 MW by mid-day, only to be followed up with a jump back to 3698 MW by hour 23.  Add it all up and the daily average actually finished just shy of 400 MW short of the weekly average.  Yesterday had even higher flows and a low of just 2550 MW, 1000 MW above the 11th’s low.

Transmission – MidC to BC

Aside from a small drop on the 9th, we’ve seen steady increases to average daily flow each day over the past seven, ultimately leading to a high of 801 yesterday.  Hourly flow also hit peak yesterday, coming in at 1520 MW.  After more than a week of negative flow, we’ve now marked three consecutive days of flow heading north.


Have a great week,