June 18, 2002: Moderate Stratiform Precipitation Author: Pam Heinselman, CIMMS/OU Last Updated: 11 April 2003

Forecast/Weather:

On 18 June 2002, a series of 700-mb shortwave troughs in the westerlies were approaching Oklahoma that may have helped force a region of stratiform precipitation that moves east-northeastward across Oklahoma.

Radar Operations:

Start time: 13:50 6/16/02 UTC (08:50 6/16/02 local time)
Stop time: 23:44 6/16/02 UTC (18:44 6/16/02 local time)

Radar/Operational Status:

Hydrometeor Classification Algorithm: Warm season

Operational Delivery:

Not applicable.

Snapshots:

Figure 1: The radar reflectivity field shows stratiform precipitation over south-central Oklahoma at 17:17 UTC on 18 June 2002.	Figure 2: A bright band (melting layer) is indicated by a band of lower (0.9-0.93) correlation coefficient, surrounded by higher correlation coefficients in northern Texas at 17:17 UTC on 18 June 2002.	Figure 3: The hydrometeor classification algorithm identifies moderate precipitation over parts of northern Texas and southern Oklahoma.
Figure 4: Radar reflectivity image at 22:12 UTC 18 June 2002.	Figure 5: Correlation coefficient image at 22:12 UTC 18 June 2002.	Figure 6: Hydrometeor classifcation algorithm image at 22:12 UTC 18 June 2002.