IEM Daily Bulletin

[Iowa Mesonet]

Iowa Environmental Mesonet Daily Bulletin
Data valid for 12 November 2007

> News
 +----------------------------------------------
 | Title : Oct AWOS data uploaded
 | Date  : 13 Nov 09:16 AM
 | Author: Daryl Herzmann
 | URL   : http://mesonet.agron.iastate.edu/AWOS/reports/2007precip.phtml
 +----------------------------------------------

The 1 minute interval data from the Iowa AWOS network for
October has been uploaded to the IEM.  I am still awaiting
for NCDC to update the Oct ASOS 1 minute data.

> Yesterday's Daily Feature

 +----------------------------------------------
http://mesonet.agron.iastate.edu/onsite/features/cat.php?day=2007-11-12
 | Title : Got wet without rain
 | Date  : 12 Nov 07:12 AM
 | Votes : Good: 17   Bad: 7
 +----------------------------------------------

A surge of very moist air made it into the state on Sunday with dew points (green line) rising into the mid 50s in Ames (RWIS site shown).  If you get up before noon on Sunday, you should have noticed most surfaces being wet. The reason was that the dew point temperature was warmer than surfaces such as pavement, so air right next to the surface will cool to its dew point and water will be condensed out.  The featured plot shows this as the 3 pavement temperatures become nearly equal during the morning hours before temperatures warm well above the dew point.  You can also see the effects of the cold front that sweep out the moisture late Sunday night.

> NWS Watch/Warning Summary
*** Products issued on 12 Nov 2007

             Summary +_________ By WFO ____________+  Watches 
Type         US   IA | ARX   DVN   DMX   OAX   FSD |  US 
Tornado       0    0 |   0     0     0     0     0 |   0
Svr Tstorm    0    0 |   0     0     0     0     0 |   0
Fl Flood      0    0 |   0     0     0     0     0 | N/A

ARX = LaCrosse, WI  DVN = Davenport, IA    DMX = Des Moines, IA 
OAX = Omaha, NE     FSD = Sioux Falls, SD