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WSR-88D Movies

1998 July 25-27

July 26 0Z
8Z
14Z

Radar Grid Field Radar Grid Field
CYS 1 DZ VE DDC 0 DZ VE
2 DZ VE 1 DZ VE
EAX 0 DZ VE 2 DZ VE
1 DZ VE 3 DZ VE
2 DZ VE GLD 1 DZ VE
LNX 1 DZ VE 2 DZ VE
2 DZ VE LSX 1 DZ VE
TWX 0 DZ VE 1* DZ VE
1 DZ VE 2 DZ VE
2 DZ VE SRX 1 DZ VE
FTG 0 DZ VE 2 DZ VE
1 DZ VE UEX 1 DZ VE
2 DZ VE 2 DZ VE SGF 0 DZ VE
INX 0 DZ VE PAH 1 DZ VE 1 DZ VE
1 DZ VE 2 DZ VE 2 DZ VE
2 DZ VE OAX 1 DZ VE NQA 0 DZ VE
2 DZ VE 2 DZ VE
*elevation angle 1 (2nd lowest)

Overview of Significant Weather

Heavy rain event along the front range of the Rockies (afternoon) and over the central Great Plains of the U.S. (overnight) within a week-long pattern of similar occurrences. This event occurred during an active southwest monsoon pattern with a quasi-stationary surface front oriented east-west across the central U.S. Afternoon convection in the monsoon pattern produces up to 6 in. of rain in the Denver area. This convection merges with convection on the Colorado high plains to form a large squall-type MCS with stratiform precipation along the Colorado-Kansas border during the late evening and overnight. A series of short convective bands with quasi-periodic spacing that form out ahead of the MCS in SW Kansas (0300 UTC - 0600 UTC 26 July) could be associated with PBL wave activity. Meanwhile east-west oriented bands of substantial longitudinal extend form over northern and central Kansas ahead of the approaching MCS. These bands, which form north of the surface front in a strong southerly low-level jet environment, become the dominant convection during the predawn hours (e.g., 0900 UTC) and produce up to 6 in of rain in the Kansas City area. The Colorado MCS that approached from the west has dissipated leaving a short-lived MCV in its wake over NW Kansas. The large mass of stratiform precipitation dissipates over Missouri and the lower Ohio Valley after sunrise on 26 July. Convection redevelops over Colorado the following afternoon and although less extensive a similar precipitation pattern occurs over the central plains the following night.

Key images

Composite map (0100 or 0200 UTC 26 July)
Surface map (1800 UTC 25 July - 1800 UTC 26 July)
Sat irmb (1800 UTC 25 July - 1800 UTC 26 July)
Nexrad cent_plains (2100 UTC 25 July - 1500 UTC 26 July)
Nexrad cent_Missvly (0800 UTC 26 July - 1800 UTC 26 July)
Profiler msl_wp (1800 UTC 25 July - 1800 UTC 26 July)
Profiler agl_wp (1800 UTC 25 July- 1800 UTC 26 July)

University Corp for Atmospheric Research National Center for Atmospheric Research Mesoscale and Microscale Meteorology Division