Schneider
]]>
Schneider
]]>1) It is shallow.
Satellite IR cloud top temperatures have been everywhere unusually warm over the ARB and the S-band precip profiler echo tops have remained below about 5 km. Consistent with this shallowness, the storm in the Coast Range has was a non-brightband, warm-rain kind of event at the Cazadero site. In addition to not exhibiting a melting layer bright band (even though echo tops may be above the 0C level), these periods generally contain very high concentrations of small raindrops and very low concentrtions of large drops. Most of the Z-R relations commoly applied by NEXRAD underestimate rain rates in these situations. Whether the non-brighband rain is also prevailing over the ARB in the Sierra is less clear. Some period of brightband have definitely been observed there by the profiling radars during part of the storm, but other time periods may well be non-brightband.
2) Orographic enhancement of precipitation is impressive.
Sacramento and most of the Central Valley are receving very little precip, while the foothills and mountain sites in the Sierra have accumulated over 2 inches of liquid and isn't finished yet.
3) Low level jet is developing.
As John Brown predicted, a low level jet has developed with this storm, at least in the northern part of the Central Valley. The LLJ can be seennicely in the maxima pattern of strong southerly winds about 1 km above the surface in the HMT wind porfiler data a Chico.
4) As a test of this forum blog, I will buy a beer for the first HMT preson to comment on these comments.
- Martner
]]>To add content, click on the "Add Content to Forum" button near the top of Weather Forum blog page. An authentication dialog box will pop up. Please enter your NOAA Email Account username and password (**due to IT security constraints, only individuals with NOAA Email Accounts can add content to the blog at this time**). Then, you will encounter a screen with a header on the upper left that says "MOVABLETYPE Publishing Platform" that asks for a username and password. For the username insert "forum" and for the password insert "hmt2007". Now, you should have a screen with a header of "My Weblogs" . Click on the link "HMT-West 2007: Weather Forum".
If you want to add a new entry to the blog, click on "New Entry" under Posting on the upper left side. Insert a title to your entry in the "Title" box and the body of your entry in the "Entry Body" box. If you think that your content falls into a certain category, please define that category in the "Primary Category" box. For example, I think this message falls under the general category of Administration----other categories might be "Models", "Observations", "QPF", "QPE", etc, you name it. Over time, a common set of categories might evolve that will help organize the posts.
Once you have completed entering your content, go to the bottom, and select "Published" from the Post Status scroll-list, then click the "Save" button. If you need to modify an existing entry, click on "Entries" under Posting on the upper left side of the main forecast blog page. Make your changes, make sure the "Published" is still selected and then click "Save".
If you have questions or comments about this blog, please contact me. I suspect its structure might evolve as it is used more. Please fire away! I hope that it is useful.
Dave Kingsmill
]]>