Cumulonimbus base
Specimen #1
 
 


Photograph Data
Date: 06 August 2000
Time: 1420 UTC (8:20 a.m. CST)
Location: Columbia, MO, USA


Synopsis
Cumulonibus base featuring fractus elements (1) and active rain shaft (2).  Convection occurred in warm moist air mass ahead of an approaching cold front located from Minnesota to Kansas.

Representative Surface Observation

Station:  Columbia Regional Airport
Date:  06 August 2000
Time:  1354 UTC  (7:54 a.m. CST)
 
Wind direction 210 degrees (southwest)
Wind speed 4 knots
Visibility 10 statute miles
Present weather Thunderstorm
Sky condition Few clouds at 5,000 feet
Temperature 24.4C
Dew point 21.7C
Altimeter setting 29.81 inches Hg
Sea level pressure 1008.5 mb
Remarks Thunderstorm west-southwest moving east; lightning in-cloud and cloud-to-ground southwest


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