Absolute Humidity Posted February 5, 2011 Share Posted February 5, 2011 I just noticed my area temps tank 8 degrees in the last 2 hrs from 32 to 23.8. Other stations outside of town are in the teens. Can anyone chime in and discuss if radiational cooling has any effect up the colome to 850mb? Not expecting much from this next event, but can rad cooling bring a better front end snow? Link to comment Share on other sites More sharing options...
Absolute Humidity Posted February 5, 2011 Author Share Posted February 5, 2011 22.8/16 that's 1 degree drop in last 10 mins! Link to comment Share on other sites More sharing options...
am19psu Posted February 5, 2011 Share Posted February 5, 2011 I just noticed my area temps tank 8 degrees in the last 2 hrs from 32 to 23.8. Other stations outside of town are in the teens. Can anyone chime in and discuss if radiational cooling has any effect up the colome to 850mb? Not expecting much from this next event, but can rad cooling bring a better front end snow? If anything, it will make ZR more likely. The radiational cooling only affects the boundary layer (known as a nocturnal inversion), which is well below 850mb in the winter, meaning the low levels may be warm, but the near surface will be cold. Link to comment Share on other sites More sharing options...
tombo82685 Posted February 5, 2011 Share Posted February 5, 2011 If anything, it will make ZR more likely. The radiational cooling only affects the boundary layer (known as a nocturnal inversion), which is well below 850mb in the winter, mean the low levels may be warm, but the near surface will be cold. to further elaborate on adam's pt, you can see here on the newest ruc 3z at this present time, the 850s are already above 0 and the 925mb temp will soon follow. You can see on this 850 map the sw wind is starting to kick in which is death for snow Link to comment Share on other sites More sharing options...
Absolute Humidity Posted February 5, 2011 Author Share Posted February 5, 2011 Thanks all. Too bad those south west winds are not coming from Dallas Link to comment Share on other sites More sharing options...
tombo82685 Posted February 6, 2011 Share Posted February 6, 2011 Thanks all. Too bad those south west winds are not coming from Dallas i found this on a site to demonstrate what adam was saying but ground inversion, this is what it looks like on a sounding, and probably is depicted pretty well in this situation. Link to comment Share on other sites More sharing options...
am19psu Posted February 6, 2011 Share Posted February 6, 2011 i found this on a site to demonstrate what adam was saying but ground inversion, this is what it looks like on a sounding, and probably is depicted pretty well in this situation. Yeah, that's a really severe example, though. Most of the time there is not as sharp of an angle on the temperature trace. Link to comment Share on other sites More sharing options...
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