SPC MD 658



MD 0658 CONCERNING TORNADO WATCH 172… FOR PORTIONS OF CENTRAL NEBRASKA

MD 0658 Image

Mesoscale Discussion 0658
NWS Storm Prediction Center Norman OK
0812 PM CDT Fri May 17 2019

Areas affected...Portions of central Nebraska

Concerning...Tornado Watch 172...

Valid 180112Z - 180315Z

The severe weather threat for Tornado Watch 172 continues.

SUMMARY...A long-lived supercell thunderstorm continues to move into
an environment favorable for tornadoes. The strength of the
low-level wind fields suggests that some tornadoes may be
significant. Large hail will also be possible.

DISCUSSION...An intense supercell with a history of producing
tornadoes has been ongoing for the last few hours and has shown
increasing signs of rotation per KUEX radar. Low-veering in the KUEX
VAD profile shows very large 0-1 km SRH approaching 400 m2/s2. Given
the continued influx of higher theta-e air and increased low-level
winds accompanying the low-level jet, this activity is expected to
persist into at least mid-evening. Tornadoes, some significant, and
large hail will all be possible with this activity.

..Wendt.. 05/18/2019

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...OAX...GID...LBF...

LAT...LON   41280048 41989964 42309816 41799755 41069867 40719977
            40640017 40750044 41280048 

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