SPC MD 679


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Mesoscale Discussion 0679
NWS Storm Prediction Center Norman OK
0251 AM CDT Sat Jun 09 2018

Areas affected...Eastern Nebraska...Western Iowa

Concerning...Severe potential...Watch possible 

Valid 090751Z - 090945Z

Probability of Watch Issuance...40 percent

SUMMARY...A wind damage threat will likely continue for a couple
more hours across parts of eastern Nebraska. The severe threat may
affect Iowa but the wind damage threat with the line is expected to
become more isolated with time. Due to the continued severe threat,
weather watch issuance still can not be ruled out.

DISCUSSION...The latest radar imagery shows an MCS over east-central
Nebraska with a well-defined outflow boundary surging southeastward
away from the line in southern Nebraska. Over the last hour, several
measured severe wind gusts have been observed, notably at Aurora,
Kearney and York. Moderate instability is analyzed ahead of the line
by the RAP with MLCAPE estimated in the 2500 J/kg near Omaha. This
should enable the line to continue to have a wind damage threat for
a couple more hours. However, a gradual decrease in the threat is
expected to take place as the MCS approaches western Iowa.

..Broyles/Thompson.. 06/09/2018

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


LAT...LON   42439505 42109439 41689429 41219469 40799522 40139581
            39869650 40259739 40859806 41579803 42739659 42439505 

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