ZCZC SPCSWOMCD ALL
ACUS11 KWNS 180112 
SPC MCD 180112 
NEZ000-180315-

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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