Sunday, April 9, 2017

New GOES Weather Satellite Imagery

The new GOES-16  weather satellite has been in orbit since November 16, 2016 and some of the imagery is available in real time.   It is marvelous.   The spatial resolution of the imagery is higher than the current operational weather satellites, but what  really is a game change is the frequency of observation,  with new images every 5 minutes versus every 15 minutes for the current operational systems.


Let me show you a few samples. Let's start with a visible image around 11 AM Sunday morning centered on the Pacific Northwest.   You can a north-south oriented frontal band off our coast and relatively clear skies over the Columbia Basin.  But over far eastern WA and northern Idaho there is a a nice example of lines of cloud streets, with regular spacing.


Here is a blow up of the cloud streets.  They occur when the atmosphere is relatively unstable at low levels with air rising in the clouds and sinking between them.  The wind direction is roughly parallel to the lines.


This feature, also known as convective rolls because of the nature of atmospheric circulation reflects an atmospheric instability that occurs when the lower atmosphere has a large change in both temperature and wind with height (see schematic below)

Courtesy of the UCAR COMET Program
How about a view of a Pacific cyclone? Here is a GOES-16 image of the Friday storm approaching Vancouver Island--you can clearly see the swirl of clouds with the low.


The day before, as the storm approached Oregon, the region was covered by trapped mountain wave clouds, again with lines of clouds and clear areas.  

But the mechanism of these clouds are completely different than the cloud streets, being associated with atmospheric waves forced by the mountains (see schematic below).  For mountain wave clouds, the winds near crest level are oriented perpendicular to the cloud lines.


Visible satellite imagery from weather satellites like GOES-16 show how the instability clouds over the ocean can rev up when then reach land and our terrain.  This is illustrated by the situation on Saturday (below).  The scattered weak showers over the Pacific deepen and expand over western Washington and Oregon, and then shrink as the descend the eastern slopes of the Cascades.




If you want to enjoy seeing GOES-16 images anywhere in the country (and for other wavelengths as well), check out the wonderful website created by the College of DuPage (found here).  Enjoy.

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8 comments:

Bob said...

You say that images are available, but there are no links to serving sites. Might uninformed me recommend http://www.goes-r.gov/multimedia/goes-16DataAndImagery.html as a starting place? No doubt a better "gateway" to these data exists, but I found a good start here.

John said...

When will the NWS would put the new images on their web sites along with all the other various satellite image types?

Stinky_Wizzleteats said...

Seems like the early data for GOES-16 are scattered in many places on the net. The best image source I have discovered is at RAMSDIS Online on the GOES-R Proving Ground Real-time Products page http://rammb.cira.colostate.edu/ramsdis/online/goes-r_proving_ground.asp

The first section has a nice selection of color imagery and loops. The 4-week archive is a great feature. Here's a custom loop of the 7 April storm https://goo.gl/HZflHp

(Hope it's ok to use shortened url's for the really long links.)

An impressive full-disk 24-hr color loop showing last week's intense storm spinning off Oregon and Washington is here https://goo.gl/2iF7ur

The Loop of the Day page has many interesting loop examples back through early March. Some of these are also on the goes-r.gov site.

Any news yet if GOES-16 ends up in the West or East slot?

John K. said...

Just stunning.. especially when watching the "loops".

ga said...
This comment has been removed by the author.
Grigsby said...

Can I ask a random question? I live in North Seattle, and this morning, I checked Weather Underground, and the stations all around me said that the temperature was hovering around 40 F. Yet I go out to my car, and there's ice on the windshield. Can ice/frost form even though the air temperature doesn't drop below freezing? My house is in a bit of a depression on the top of Maple Leaf hill. Could the fact that I'm in a bowl mean that the temperature at my house is lower?

Eric Blair said...

This report from the NIH describes experiments conducted by the EPA on adults and children in order to prove their thesis on Climate Change:

https://ehp.niehs.nih.gov/1103877/

Regardless of the voluntary nature of some of the subjects, this policy is illegal (according to both US and International law) and highly immoral, according to the extremely high levels of small particles the subjects ingested while enclosed in very confined spaces. This is not a good way to convince skeptics of the merits of your cause, you could say.

Tony said...

Here is a useful link I was able to make with a hint from Mike Zuransky from
College of DuPage - Nexlab .

http://weather.cod.edu/data/goes16/northwest/current/northwest_02_latest.jpg

versus

http://www.atmos.washington.edu/cgi-bin/latest.cgi?vis1km+-notitle