Teacher's Name      
Teacher's email
Observers' Names     
Select Site!   Florida State University Belleview Middle School Cobb Middle School Combee Elementary School Dowdell Jr. High School Ferry Pass Elementary School Frontier Elementary School Golden Gate Elementary School Indialantic Elementary School Kingsburg High School Knights Elementary School Leon High School Lincoln High School Northwestern Middle School Palm Beach Day School Palmetto Elementary School Pasco High School Pelican Island Elementary School Pinecrest Elementary School Sherwood Forest School Walker Memorial Junior Academy
Date of observation (e.g., 03/05/99)       
Time of Observation        (4 digit UTC, eg. 1515)

Temperature Observations

Max Temperature       Min Temp.       Current Temp.       

Relative Humidity Observations

3. Read the dial or digital hygrometer to the nearest 1%. Select your instrument here: Dial Hygrometer Omega RH 81 Digital Hygrometer VWR Digital Hygrometer

Direct Measurement of Relative Humidity  %     

Dry Bulb Temperature (T)        Wet-bulb Temperature (T_w)       

6. Find the wet-bulb depression (this is T - T_w).       

7. Using the psychrometric tables provided, find the relative humidity.   %    

Cloud Observations

8. Estimate the cloud cover Clear Few (just a Few clouds) Scattered (Partly Cloudy) Broken (Mostly Cloudy) Overcast Obscured (Can't see the clouds! - make sure you fill in #10!)

Note: There are new cloud cover defintions being used by the National Weather Service and we are proposing to adopt them in GLOBE. Please look these over carefully!

•      Clear (CLR) = there are no clouds in the sky
•      Few (FEW) = sky is covered 1/8 to 2/8 by clouds
•      Scattered (SCT) = sky is covered 3/8 to 4/8 by clouds
•      Broken (BKN) = sky is covered 5/8 to 7/8 by clouds
•      Overcast (OVC) = sky completely covered by clouds
•      Obscured (OBS) = sky (cloud cover) is obscured
  
  9. Check the predominant cloud types present. Please select all present!

  LOW:   

  Stratus       Stratocumulus       Cumulus       Cumulonimbus      
  

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  MIDDLE:   

  Nimbostratus       Alsotratus       Altocumulus

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  HIGH:   

  Cirrocumulus       Cirrus       Cirrostratus      
  

  10. If sky was obscured, please select the obscuring phenomena!
  None Smoke Haze Fog or Mist Drizzle Falling Snow or Ice Pellets Falling Rain or Freezing Rain Sea Spray Blowing or Drifting Snow Blowing or Suspended Dust or Sand Volcanic Ash Other or Combination of Above

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  Comments Section

  11. Did you note any differences between the current temperature using the U -shaped max/min thermometer and the dry bulb thermometer? Would you care to speculate as to why?
  
  
  12. Did you note any differences between the hygrometer relative humidity (RH) and the RH figured from the psychrometer? Would you care to speculate as to why?
  

  13. Were there any problems or sources of confusion in taking the cloud observation today?
  
  
  14. Please use the block below if you have any supplemental comments or observations. Thank you!