Research Article

The Effect of the Dry Line and Convective Initiation on Drought Evolution over Oklahoma during the 2011 Drought

Table 2

Overview of the dry line analysis statistics for the months of April and May. Included is the average monthly longitude for each category of dry line (CI no rain, rain, from climatology and from observations; degrees longitude), the average longitude of dry line CI and dry line rainfall, and the percent number of days having a dry line from observations. These statistics are also broken down for each month into quiescent and active dry line classifications. Dry lines included in this analysis are either from 0000 UTC, except for 1 dry line in April and 2 in May that were analyzed at 2100 UTC due to frontal influences at 0000 UTC.

AprilMay
OverallQuiescentActiveOverallQuiescentActive

Average dry line longitude
 CI no rain (°W)99.0N/A99.099.5101.799.0
Average longitude
 CI (°W)98.699.098.599.399.399.4
Average dry line longitude
 w/ rain (°W)97.598.397.198.197.498.3
Average longitude
 Rainfall (°W)97.598.597.198.197.698.6
Average monthly longitude
 Climatology (°W)100.0100.5
Average monthly longitude
 Observations (°W)97.396.997.798.698.399.0
Total number of dry lines6331789