Warm Monday, Cool Tuesday with a Dash of Rain, Mild Wednesday

Monday – Wednesday, October 9 – 11, 2017.


4:45 PM Monday shows storms forming to the south of the Lawrence area, then blowing off to the northeast over the local area and weakening.


5:45 PM image one hour later shows the rapid movement of the storms.  Over an inch fell at the Emporia Airport from the storms.


The sun sets toward the horizon as seen from the Clinton Lake Dam Monday evening.  Thunderstorms that formed over southeast Kansas Monday afternoon moved northeastward over the Lawrence area Monday evening.  The cooler air over the local area, north of an advancing cold front, cut off the surface-based heat and instability source, so the storms lost energy rapidly.  The formerly robust storms could only muster a bit of lightning and trace amounts to a few hundredths of an inch of rain around sunset in the Lawrence area.



The best overall depiction of the sky condition that I captured on this outing.  Just a few drops were coming out of the sky but, surprisingly, there was still occasional lightning and rolls of thunder.  Plenty of gulls in the sky, too.  


Zooming in at Mound Overlook from the dam.. a couple of people are seen gazing at the view to the left of the tree on top while gulls fly overhead.


Gulls fritter about as the sun attempts a final showing Monday evening.



Monday morning 500 MB showing approaching upper trough crossing the Rockies.


Monday evening 500 MB shows the upper trough advancing toward the area, continuing to dig southeastward.  The high in Lawrence was 78 and the low 46 on Monday with a trace of precipitation up to 7 PM.


By Tuesday morning the system is moving across Kansas, but not much precipitation yet.  An average of 0.01 has fallen in Lawrence from the dissipating thunderstorms of the previous evening shortly after 7 PM.


Tuesday at 9:45 AM – Looks like it ought to to something but so far the main rainfall has been in southeast Kansas to Missouri, but new showers are forming associated with the upper low across eastern Kansas as seen with the higher-topped clouds to our west.  It is cloudy with a cool north breeze, but rain so far for the day amounts to nothing in Lawrence area.


To the west at 9:45 AM Tuesday, a new snow pattern over the Rockies and parts of the adjacent high plains.  An area of fog is over the Gunnison Valley.



The 1:45 PM image shows our hour-long shot of rain, which crossed the Lawrence area from about 1 to 2 PM.  I recorded 20 hundredths of an inch in the event, plus 0.01 the previous evening from the sunset sprinkles.  The Lawrence city average for the event was 20 hundredths, while the Lawrence Airport recorded 16 hundredths from the event (0.01 Monday evening and 0.15 with the early afternoon rain shot).



By early afternoon a lot of the high plains snow has already melted and the Gunnison Valley fog is gone.


The Tuesday evening (Oct 10) 500 MB shows the system moving off to our east.  The day was cool, cloudy and breezy.  The high of 53 occurred at the start of the day CST (1 AM CDT).  The low was 45 which which occurred between 1:15 PM and 3:30 PM, associated with the early afternoon rainfall.  By the end of the day the temperature had risen slightly to 47 degrees.  The next upper trough starts to dig down the west coast.


Wednesday morning, Oct 11th, 500 MB chart.  Clouds are still wrapping around us.  The next system continues digging due south along the west coast.


At 9:45 AM the low clouds retreat to the east and the sun breaks out with clear sailing out west.   The morning low at the airport was 43 while the afternoon high under sunny skies reached 64.  At my residence the low was 46 where the temperature sat through the overnight hours, while the high touched 69 degrees from 5:15 to 5:30 PM.


New trough out west starts to move inland and set to bring the next dry wind event to the California coast – and a mild and dry southwest flow for Kansas for the next few days.


At 9 PM CDT (7 PM Pacific) ominous looking pressure gradient across northern and central California associated with the upper trough now starting to dig into the Great Basin (500 MB chart above).  This is going bringing another Diablo wind event to northern California tonight and Thursday – just what they do not need there.  The pressure gradient is tightening up across the high plains, too.  This portends warm temps and breezy south winds for the next day or two for Kansas.

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