[wxqc] dew point errors

Bill Simm williamr at mts.net
Mon Apr 17 01:34:36 EDT 2006


Hi there,
   I have been that getting out of range error message regarding my dew point continuously for the last couple of weeks.   I thought maybe the problem was the snowmelt,  but the last of the snow in yard dissapeared about 2 weeks ago and I am still getting the error message. 
   My thermo-hygrometer is located on the north side of the shed right on the corner (not directly under the eev - the shed is painted white).   There are also the two 120 foot spruce trees in the yard.  The result is the thermo-hygrometer is not exposed to much direct sunlight.   The instrument has its own litte wind and sun shield on it.  I think the location is pretty good and combined effect of the all these conditions pretty much amounts to being in a stevenson screen.      
   I am wondering if the problem has to do with my close proximity to Cresent Lake?  If you are familiar with Portage la Praire,  you know there is an oxbow lake in the centre of town.  (It was once part of the Assignaboine River).    My weather station is about 100 meters from the water.  
    There are two weather other stations in this area. One,  a CWOP station at 
Southport (also an Enviroment Canada wx station) it is about 5 kms south of Portage and not near any bodies of water.   The other is an Enviroment Canada station at the University of Mantoba Field station in the marsh at Delta beach along the shore of  Lake Winnipeg about 20 km north of Portage La Praire.    
    Although close to me neither of these stations are good choice to compair dew point or humidity readings with.    There are a bound to be significant differances in our dew point and humidity readings due to the proximity of  or lack of proximity of large or small bodies of water to each station.     
    I would be very interested in hearing the opinion of anyone else regarding my dew point error problem as indicated by the weather quality report.

                                        Many thanks,
                                                                Bill
   
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