SGP/MET/E11/E15/E21/E31/E33/E34/E35/E36/E37/E38/E9 - Ice on wind sensors

Wind data was affected by ice buildup on the sensors. Data during this period should be 
used with caution. Exact times of sensor thaw are unknown.

• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Wind speed vector mean(wspd_vec_mean)
• wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)

SGP/MET/E35 - Data collection problem

Site communication problem resulted in missing/lost data during this time.

• qc_wdir_vec_std
• Wind speed vector mean(wspd_vec_mean)
• Atmospheric pressure(atmos_pressure)
• qc_tbrg_precip_total
• qc_time
• qc_tbrg_precip_total_corr
• East longitude(lon)
• Wind direction vector mean(wdir_vec_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• tbrg_precip_total
• qc_temp_mean
• Altitude above mean sea level(alt)
• qc_wdir_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Temperature mean(temp_mean)
• qc_wspd_vec_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• qc_atmos_pressure
• time
• qc_wspd_arith_mean
• time_offset
• base_time
• qc_rh_mean
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• qc_vapor_pressure_mean
• wdir_vec_std
• North latitude(lat)

SGP ALL INSTRUMENTS - Icing Event

An icing event (winter storm Cara) passed slowly through the area during this time frame.  
Instruments at the SGP may have been affected by ice accumulation.

• Temperature mean(temp_mean)
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• tbrg_precip_total
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• wdir_vec_std
• Wind direction vector mean(wdir_vec_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)

SGP Site Power Outage Due to Winter Storm

On Saturday and Sunday, December 26 and 27th a powerful winter storm (Goliath) brought 
sleet and freezing rain to much of Oklahoma with wind gusts of 45 MPH at times. The result 
was very very slick roads and mass power outages.
 
The SGP central facility lost power at 8:55 PM CDT on Sunday, December 27th.  
The power was restored on 7:56 PM CDT on Wednesday, December 30th
 
Site Emergency procedures were activated and Technicians drained water out of instrument 
reservoirs and other measures as needed, early Monday morning.
 
On Wednesdays as roads and power started was restored to much of the areas east of I-35 , 
Site Technicians performed maintenance on several Extended Facilities.

During this period, data are potentially missing, incorrect, or suspect.  Carefully 
inspect the data before use.

• qc_wdir_vec_std
• Atmospheric pressure(atmos_pressure)
• Wind speed vector mean(wspd_vec_mean)
• qc_tbrg_precip_total
• qc_time
• qc_tbrg_precip_total_corr
• East longitude(lon)
• Wind direction vector mean(wdir_vec_mean)
• Vapor pressure mean, calculated(vapor_pressure_mean)
• tbrg_precip_total
• qc_temp_mean
• Altitude above mean sea level(alt)
• qc_wdir_vec_mean
• Wind speed, lower, 1-min avg(wspd_arith_mean)
• Temperature mean(temp_mean)
• qc_wspd_vec_mean
• Humidity, relative, at 2-m height, 1-min avg(rh_mean)
• time
• qc_atmos_pressure
• qc_wspd_arith_mean
• time_offset
• base_time
• qc_rh_mean
• TBRG precipitation total, corrected(tbrg_precip_total_corr)
• qc_vapor_pressure_mean
• wdir_vec_std
• North latitude(lat)

SGP/MET/E35 - False tips in high winds

The TBRG's were mounted at a height that made them prone to vibrations caused by high 
winds which may have caused false tips.  The end date of this DQR indicates when the rain 
gauge was lowered to mitigate these effects.  

Effects on the total precipitation amounts are assumed to be negligible.

• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)

SGP/MET/E35 - Tipping bucket rain gauge flatlined

For an unknown reason, the tipping bucket rain gauge was not recording precipitation 
during this time.

• tbrg_precip_total
• TBRG precipitation total, corrected(tbrg_precip_total_corr)