The new cycle 24 solar forecast is hot off the press from noon today, published at 12:03 PM from the Space Weather Prediction Center. It looks like a peak of 90 spots/month in May of 2013 now. SWPC has dropped their “high forecast” and have gone only with the “low forecast” as you can see in the before and after graphs that I’ve overlaid below. Place your bets on whether that “low forecast” will be an overshooting forecast or not. It has been a lot of work getting this info out as the SWPC has had trouble with their web page today.
The quote of interest is:
A new active period of Earth-threatening solar storms will be the weakest since 1928 and its peak is still four years away, after a slow start last December, predicts an international panel of experts led by NOAA’s Space Weather Prediction Center.
After over a year of hedging, it looks like NOAA’s SWPC is finally coming around to the reality of a lower than normal solar cycle. – Anthony
UPDATE2: Minutes later @12:15PM. Dammit, they changed the graphs back! Anybody have cache files? – Anthony
UPDATE3: @12:20 PM And now it’s back.
UPDATE4: @ 12:45PM There are some serious problems with the SWPC page, the sunspot graph content keeps changing and the 10.7 flux graph is just plain wrong. They also have no written press release. What a train wreck.
UPDATE5: @1:00PM I called Doug Biesecker, SWPC’s “media relations” director at both of his numbers, to ask what is going on. No answer. Left a request for a call-back.
UPDATE6: @1:40PM I heard from Doug Biesecker, he said they are having server issues, he and his webmaster were working to fix the problem. He also said the press conference was recorded and he would be sending an audio link. Look for it here soon.
UPDATE7: @2:10PM looks like SWPC has their web page fixed now. Thanks Doug.
UPDATE8: @2:18PM Found the NOAA SWPC press release (linked at spaceweather.com) and it is reprinted below the “read more” line. I also changed the title of this post to reflect the quote in the spaceweather.com feature story/PR from SWPC.
I was able to capture the new sunspot prediction graph, and combined it with the previous prediction as an overlay, which I have presented below:
click for larger image - note this is an overlay done by WUWT
Leif Svalgaard found this explanation:
If one digs a little deeper, there is some ‘explanation’
http://www.swpc.noaa.gov/ftpdir/weekly/README3
Solar Cycle 24 Prediction Update
May 8, 2009 — The Solar Cycle 24 Prediction Panel has reached a consensus decision on the prediction of the next solar cycle (Cycle 24). First, the panel has agreed that solar minimum occurred in December, 2008. This still qualifies as a prediction since the smoothed sunspot number is only valid through September, 2008. The panel has decided that the next solar cycle will be below average in intensity, with a maximum sunspot number of 90. Given the predicted date of solar minimum and the predicted maximum intensity, solar maximum is now expected to occur in May, 2013. Note, this is a consensus opinion, not a unanimous decision. A supermajority of the panel did agree to this prediction.”
Leif writes:
The ‘90′ was not agreed upon. The only choices the panel members had in the last vote were ‘high’ or ‘low’. I pointed out that the value was important too and that just because 90 was the average number of the ‘low’ group two years does not mean that it a good number now. This was ignored.
This one paragraph below is all we have so far from SWPC web page:
Solar Cycle 24 Prediction Update released May 8, 2009
The charts on this page depict the progression of the Solar Cycle. The charts and tables are updated by the Space Weather Prediction Center monthly using the latest ISES predictions. Observed values are initially the preliminary values which are replaced with the final values as they become available.
Here is the “press release” as feature story from spaceweather.com Read the rest of this entry »
RSS - Posts
Recent Comments