Mid-Week Update

Good Morning,

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


SP15 Loads

SP-15’s daily average loads increased just over 400 MW yesterday as light load hours saw demand jump 400 MW as well.  Peak demand was mostly unchanged however as loads fell just 40 MW in the early evening hours.

Mid-C Loads

Mid-C peak load reached 22,006 MW yesterday, a day-on-day increase of 130 MW.  Minimum light load demand essentially stayed flat with just a 4 MW increase.  Factor those two together and you get a daily aggregate increase of 150 MW.  Loads are down 1,600 MW week-on-week.

NP-15 Loads

While peak loads fell just over 100 MW day-on -day in NP, average daily loads increased 250 MW as overnight demand jumped 305 MW.  Demand increased 320 MW week-on-week as well thanks to sustained demand in the early-afternoon hours.

Palo Verde Loads

Peak demand exploded in PV yesterday as late-afternoon loads reached 9,650 MW, a day-on-day increase of 495 MW.  This brought the daily average to 8,155 MW, an increase of 280 MW compared to Monday.


Current Weather Summary

After warming up over the weekend, the West is quickly cooling down as just two stations show a temp anomaly greater than one degree (positive).  Temps cool off considerably as you move away from the coasts as Palm Springs shows up seven degrees below normal, and Las Vegas at just over nine degrees from average.

Burbank Weather

Highs are projected to stay below average for nearly two more weeks and will hit the bottom at 57 on the 16th, 13 degrees below normal.  Next week warmed up a few degrees compared to yesterday’s projections but remain 5+ degrees from normal.

Palm Springs Weather

Similar chart for Palm Springs as temps should fit nicely into a neutral degree-day through the weekend.  The 17th will top out at 68, 11 degrees below normal.

San Jose Weather

Much cooler in Northern California where San Jose will sit in the high 50’s through the 17th and fall as much as ten degrees below normal.  Just two days are projected above average until the 29th.

Sacramento Weather

Sacramento will hit just 52 on the 15th, 13 degrees below normal, before making a slow climb back above average by the 21st.  The remainder of the month projects a couple degrees below normal with no 70-degree days until the 29th.

Salt Lake City Weather

You have to move into the mountains to see highs reach significantly above normal.  Salt Lake should hit 84 today, eleven degrees above average, but quickly fall back to the red line thereafter.

Phoenix Weather

One last warm day for Phoenix as well as today is projected to reach 84 — eight above normal.  Temps will sink as low as 66 by the 18th before finishing out March by hugging the normal line into the high 70’s.

Seattle Weather

Seattle showed up as one of the only above-average stations in terms of 10-day aggregate temps, but it isn’t because daily highs are expected to hit anything notable, it’s because daily lows are mostly above normal at the tail-end of the forecast.

Spokane Weather

Same story in Spokane where lows should stay consistently above freezing for the rest of the month.  Low-level snow will disappear quick if it hasn’t already.

Water Supply

NW River Forecast

Steady increases are in store for the 10-Day RFC forecast beginning today and culminating in 15,379 by the 16th before smoothing out with a gradual decline through the remainder of the forecast.  1,800 aMW are expected to be shed from the 16th to the 23rd.

Snow Cover (SWE)

Here is a week-on-week look at what the Northwest’s warm up did to low-level snow through the area.  Anything below 2,500 is likely bone dry in Eastern Washington and Oregon, while even Montana felt significant losses in the valleys.

Hydro Rivers

The Lower Snake Sideflows took the largest week-on-week leap thanks to low-level snow melt, adding nearly 12,000 CFS, or a 37% increase.  the Lower Columbia Sideflows didn’t have the CFS to match that increase but did see a 46% increase in flows.

Worth noting that despite the heavy week-on-week increases, the flows pale in comparison to the same date last year.

The Consumnes, on the other hand, has more than doubled to output seen on the same date last year with 3,594 CFS.

The increase in flow began late yesterday.

Snow Depth Summary

The Northwest hubs still sit comfortably above average while everything south and east hold at or below 50% or normal.


ISO Major Unit Outages Chart

Gas outages were relieved of roughly 2,500 MW since the 9th, but still sit at 9,144 MW.  March has seen gas outages sustained at their highest levels since November.  Hydro outages fell to 2,294 MW after peaking at 3,162 on the 11th.

Nuke Status Report

DC2 refueling and maintenance continues today, though should be winding down relatively soon as we pass one-month of 0% capacity.



Have a wonderful week,