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ACUS11 KWNS 282211
SWOMCD
SPC MCD 282210
WIZ000-MNZ000-282345-

Mesoscale Discussion 1604
NWS Storm Prediction Center Norman OK
0510 PM CDT Sun Jul 28 2019

Areas affected...Eastern Minnesota and northwest Wisconsin

Concerning...Tornado Watch 543...

Valid 282210Z - 282345Z

The severe weather threat for Tornado Watch 543 continues.

SUMMARY...A broken line of showers and thunderstorms has a history
of producing tornadoes this afternoon in southern Minnesota. This
tornado threat will continue into western Wisconsin this evening.

DISCUSSION...A broken line of low-topped showers/thunderstorms with
embedded mini supercells has produced several tornadoes this
afternoon in southern Minnesota. The airmass ahead of this line
remains unstable with dewpoints in the low 70s and MLCAPE around
1000 to 1500 J/kg. In addition, the low-level environment is rich in
streamwise vorticity with 0-1 SRH around 200 to 250 m2/s2 per
modified ARX VWP. Therefore, the tornado threat is expected to
continue for at least a few more hours into western Wisconsin this
evening. An additional catalyst for the continued tornado threat
will be the strengthening low-level jet which is expected to
increase to 35 to 40 knots in the next few hours.

An isolated tornado threat persists west of this line where some
backed surface winds and high low-level theta-e remains. While the
tornado threat is much lower in this area, will continue to be slow
clearing counties from the watch due to this continued isolated
threat.

..Bentley.. 07/28/2019

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

ATTN...WFO...GRB...DLH...ARX...MPX...

LAT...LON   44379420 45389342 45689291 45769168 45729030 45489000
            44958994 43989022 43849107 43709213 43789316 43819357
            44019385 44379420



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