Weather: Cirrus and some puffy clouds. Cooler than I expected ~15-18C and comfortable.  Clear and calm in the morning transitioning to windy by mid-afternoon. By 6pm the winds had died down. Slack chatter was excited to measure that transition in the soundings. 

Today it was just me because Laura and John had a full day of radiosondes launches for the last IOP. I decided to collect soil samples from s10 (La Cumbre) and s11 (Montecito). It was a beautiful drive with negligible bike and vehicular traffic. 

S10                                                                              S11

S11 soil sample: Soil is gravelly, porous and dry. Samples just fell away from the corer. I tried multiple times to get a fairly decent sample. I wouldn't place much faith in this 3rd sample. 

S1, S4: As of this wiki, S1 and S4 is not reporting. But it'll probably, hopefully, come back online in a few hours. 

David and Lou arrive today. 

Other

• I restarted the Victron (Vbatt) for s10 last night but it’s off again today so I’m going to follow Chris’ advice and ignore it since it doesn’t not affect the measurement system.