Cirrocumulus stratiformus undulatus
Specimen #1
 
 




Photograph Data
Date: 02 August 1999
Time: 1700 UTC (11:00 a.m. CST)
Location: Sappington, MO, USA


Synopsis
Cirrocumulus stratiformus clouds with undulatus present (1) and a contrail (2) and its shadow (2a).    A region of high pressure was dominating the weather across the northern United States after a cold front located in the southeast United States moved through Missouri.

Representative Surface Observation

Station:  Lambert St. Louis International Airport
Date:  02 August 1999
Time:  1653 UTC  (10:53 a.m. CST)
 
Wind direction 50 degrees (northeast)
Wind speed 10 knots, with gusts to 14 knots
Visibility 10 statute miles
Present weather None
Sky condition Few clouds 5,000 feet, scattered clouds 20,000 feet, and broken clouds 25,000 feet.
Temperature 27.2 C
Dew point 15.6 C
Altimeter setting 30.23 inches Hg
Sea level pressure 1022.5 mb
Remarks None reported


Analyses
 
 
Surface 925 mb 850 mb 700 mb 500 mb 300 mb
Upper Air Sounding Satellite Image