Hooker (HOOK)

Variables Measured Every 5 Minutes

• Station Battery Voltage (BATV)
• Barometric Pressure at 0.75 m (PRES)
• Rain since midnight UTC at 0.6m (RAIN)
• Relative Humidity at 1.5 m (RELH)
• Solar Radiation (SRAD)
• Air Temperature at 9 m (TA9M)
• Air Temperature at 1.5 m (TAIR)
• Supplemental Air Temperature (TSLO)
• Wind Direction at 10 m (WDIR)
• Wind Direction Standard Deviation at 10 m (WDSD)
• Maximum Wind Speed at 10 m (WMAX)
• Maximum Wind Speed at 2 m (WMX2)
• Wind Speed at 2 m (WS2M)
• Wind Speed at 10 m (WSPD)
• Wind Speed Standard Deviation at 10 m (WSSD)
• Vector Wind Speed at 10 m (WVEC)

Variables Measured Every 15 Minutes

• Soil Temperature at 5 cm under Bare Soil (TB05)
• Soil Temperature at 10 cm under Bare Soil (TB10)
• Soil Temperature at 5 cm under Native Vegetation (TS05)
• Soil Temperature at 10 cm under Native Vegetation (TS10)
• Soil Temperature at 30 cm under Native Vegetation (TS30)

Variables Measured Every 30 Minutes

• 229L Soil Moisture Final Temperature at 5 cm (FT05)
• 229L Soil Moisture Final Temperature at 25 cm (FT25)
• 229L Soil Moisture Final Temperature at 60 cm (FT60)
• 229L Soil Moisture Starting Temperature at 5 cm (ST05)
• 229L Soil Moisture Starting Temperature at 25 cm (ST25)
• 229L Soil Moisture Starting Temperature at 60 cm (ST60)
• Thermocouple Reference Temperature (TREF)

Site Extremes Site Extremes since commissioning on 01/01/1994

Maximum air temperature (°F)	113	06/26/2011
Minimum air temperature (°F)	-11	02/09/2011
Maximum daily rainfall (in.)	4.16	08/18/2008
Maximum monthly rainfall (in.)	7.74	06/2003
Maximum annual rainfall (in.)	23.58	2004
Maximum wind speed (mph)	90.0	05/15/2003

Soil Characteristics

	Texture Class	% Gravel	% Sand	% Silt	% Clay
5 cm depth	loam	0	43.18	43.33	13.49
25 cm depth	Loam	0	43.54	36.54	19.92
60 cm depth	Loam	0	40.41	38.01	21.58
75 cm depth