MD 1408 CONCERNING SEVERE THUNDERSTORM WATCH 363… FOR SOUTHEAST NE
Mesoscale Discussion 1408
NWS Storm Prediction Center Norman OK
0939 PM CDT Sat Sep 01 2018
Areas affected...Southeast NE
Concerning...Severe Thunderstorm Watch 363...
Valid 020239Z - 020415Z
The severe weather threat for Severe Thunderstorm Watch 363
continues.
SUMMARY...Damaging winds and large hail remain a severe weather
threat across the southeast Nebraska portion of WW 363. The storms
located generally west and southwest of Saline and Jefferson
Counties, NE should continue to diminish in intensity, as the
stronger storms advance toward southwest Iowa. The western half or
western two thirds of WW 363 will likely be canceled early.
DISCUSSION...Long-lived cluster of storms, with a history of
producing severe wind gusts, is now moving into the far eastern
portion of WW 363 in southeast NE where storms have already occurred
or are ongoing, though the environment remains very unstable.
Effective bulk shear vectors oriented parallel to the surface
boundary extending through southeast NE and then east across
southern IA continue to favor bowing line segments. The favorable
CAPE/shear parameter space will support damaging winds and large
hail across the eastern third of WW 363. The recent tracks of the
Lancaster, Otoe, Johnson to Saline cluster of storms indicated these
storms should exit WW 363 into WW 364 between 03-0330Z, allowing the
former watch to expire as scheduled or a little early.
..Peters.. 09/02/2018
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...EAX...OAX...TOP...ICT...GID...DDC...
LAT...LON 38759974 40299861 41359665 41369592 40039544 39989618
39649630 39569731 39309735 39309786 38879794 38849844
38739850 38709932 38759974
from SPC Mesoscale Discussions http://bit.ly/2C9Xtjf
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