May 28, 2002: Rainbands Evolve Around Upper-Level Low Author: Pam Heinselman, CIMMS/OU Last Updated: 24 April 2003

Forecast/Weather:

On 28 May 2002, an semi-closed upper-level low begins to move slowly across Oklahoma (Figs. 1-2). Several rainbands develop in association with this low, moving parallel to the low's-reference frame (Figs. 3-13).

Radar Operations:

Start time: 00:01 5/28/02 UTC (19:01 5/27/02 local time)
Stop time: 01:56 5/29/02 UTC (20:56 5/28/02 local time)

Radar/Operational Status:

Hydrometeor Classification Algorithm: Cold season

Operational Delivery:

Not applicable.

Snapshots:

Figure 1: Map of the 500-mb flow at 12 UTC on 28 May 2002 (Courtesy of SPC).

Figure 2: Map of the 500-mb flow at 00 UTC on 29 May 2002 (Courtesy of SPC).

Figure 3: Reflectivity at 11:37 UTC 5/28/02.

Figure 4: Reflectivity at 12:40 UTC 5/28/02.

Figure 5: Reflectivity at 16:42 UTC 5/28/02.

Figure 6: Reflectivity at 18:47 UTC 5/28/02.

Figure 7: Reflectivity at 21:40 UTC 5/28/02.

Figure 8: Specific differential phase at 11:37 UTC 5/28/02.

Figure 9: Specific differential phase at 12:40 UTC 5/28/02.

Figure 10: Specific differential phase at 16:42 UTC 5/28/02.

Figure 11: Specific differential phase at 18:47 UTC 5/28/02.

Figure 12: Specific differential phase at 21:40 UTC 5/28/02.