Rapid drop of overnight low

[Downlinerz2]

    Has anyone ever had a rapid drop in the temp over a short period of time and then a recovery?  At about 3:30 am my temp dropped from 15F to 7.6F by about 4:30 am. I attached to graphs from WU.  I saw something like it last year and thought I saw something on the forum about something like it but could not find it.  Another WU station 0.5 miles west of me shows his temp at that time of 10.7F.  Is this something that can happen once in a while?  
Thanks for any replies!!!
    Mark

[chief-david]

I had something like that yesterday.

It was one I should have saved under crazy graphs-but didn't
Here is the WU version

[utahweatherbear]

seems to coincide with your winds going calm. pretty normal, especially in a cold, dry airmass with snow cover & clear skies. no worries.

[Downlinerz2]

    Thanks chief and weatherbear !  Normally I would not have bothered with it but it looked so "dramatic" on the graph, and seemed to last about an hour.  I did not notice the calm winds.  Bad on me. I should know better than to get too focused on the "dramatic" and miss the commonplace.  Thank you to you both!!!!
   Mark

[Garth Bock]

Same happened here in Bloomington. Everytime we have a sharp drop like this there are water main breaks around the city. Most of it is some of the turn of the century pipes.

[Downlinerz2]

Same happened here in Bloomington. Everytime we have a sharp drop like this there are water main breaks around the city. Most of it is some of the turn of the century pipes.

   Oh yeah, that doesn't happen as much here in Oregon since the city is not too old and the pipes and sewers are "relatively" new.  They only put the sewer in 5 years ago and I don't think we got city water until the mid-70's or so.  In Toledo there seems to be one big water main burst every winter.   
     Mark 

[Chris H.]

Same happened here in Bloomington. Everytime we have a sharp drop like this there are water main breaks around the city. Most of it is some of the turn of the century pipes.

   Oh yeah, that doesn't happen as much here in Oregon since the city is not too old and the pipes and sewers are "relatively" new.  They only put the sewer in 5 years ago and I don't think we got city water until the mid-70's or so.  In Toledo there seems to be one big water main burst every winter.   
     Mark 

Water mains are bursting here…most likely from age really…but the school's around here were flooded from frigid temps last week or a couple weeks ago when we saw dramatic lows.