980716 Denver Cyclone - Denver Convergence Vorticity Zone

Investigation of vortices along the DCVZ -This is the AMS Mesoscale Conference paper

21Z SFC MAP*

12Z DNR SNDG

12Z DNR SNDG MODIFIED **32.2/11.7

00Z (980717)DNR SNDG MODIFIED **32.2/11.7

RADAR

CSU-CHILL 10-cm radar ref Quicktime animation; 4 meg download. Note the numerous cyclonic vortices embedded within the radar fine-line. Figure 1 in the above paper depicts where the mobile mesonets were located across the fine-line.

KFTG Level-II base data below...

• Reflectivity @ 2100 UTC 0.5º, 1.5º
• Velocity @ 2100 UTC 0.5º, 1.5º
• Reflectivity @ 2130 UTC 0.5º, 1.5º
• Velocity @ 2130 UTC 0.5º, 1.5º
• Reflectivity @ 2205 UTC 0.5º, 1.5º. This time selected to best match the time of Fig 1 in the paper.
• Velocity @ 2205 UTC 0.5º, 1.5º
• Velocity cross section of the vortices in Fig 5 of the paper @ 2217 UTC. View is to the west.
• Velocity 0.5º plan view of the vortices @ 2217 UTC.

SATELLITE

CLICK HERE FOR SAT ANIMATION

The feature of interest to watch is the narrow line CU that develops atop/near the DCVZ. Note the MCV over ERN CO/WRN KS.

1745

1815

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1915

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2015

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2045

2115

2133

2145

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2215

2233

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2345

0015

* Mobile Mesonet 3-m winds plotted denoting location of DCVZ

** Mobile Mesonet obs used for SNDG modification. Obs sampled immediately along the DCVZ