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Dan Rajewski (in Ames)
Summary: Stations 1-4 operational
, ISU staff (Kris and Dan) serviced Station #4 around 11:45 CDT to update new tilt correction angle
An updated tilt correction was performed after having moving the sonic cross beam to replace the krypton hygrometer on July 5; 5
likely Likely morning fog event, nearby towns had visibility ~0.5 mile
daytime Daytime continuation of light winds from N to NE, warm, muggy conditions
Vdsm: 13.5-13.8 V during day, down to 12.3 at night
P: ok
T.2m: ok, stns 1-3 give erroneous data from 3:00-10:00 because of the morning moisture;
before dew/fog set in site 1 > site 2 (1.5 degrees) stns 3-4 also reading about 1.0 degree cooler than stn 11
RH.2m: 90-100% nighttime; 65% day
stns 1 5-7%RH lower than stn 4, stn 2-3 close together
erroneous data from 3:00-10:00 as in T.2m
H2O.2m: similar pattern as RH.2m,
erroneous data as in T.2m
Wetness: slight wetness the evening of July 5 (19:00 CDT) dew formation occurring from 22:30 July 5 to 7:00 July 6
sensor dry by 9:00 CDT
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RH.10m: ok, similar occurrences of bad data as in T.2M
stn 4 has few%RH lower than stns2-3 from 17:30 to 19:00
00
H2O.10m: ok see comments with RH.10m
Spd.10m: ok, late night jet possibly enhancing wind speeds at all sites from 23:00 July 5 to 3:00 July 6;
very little wind at all sites from 4:00-5:00 before increasing again (another cascade of LLJ energy?, what were the turbines doing?)
Dir.10m: ok, NW to N winds in night/morning; N to NE winds much of daytime
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w'T' : ok, stn1 larger sfc cooling whereas other stations ~ 0 during 0:00-2:00
w'h2o': ok,
h2o'h2o': ok,
kh2o'kh2o': not ok; late morning separation from stn 4 > stn 2 by factor of 2
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