SPC Severe Thunderstorm Watch 628

SPC Severe Thunderstorm Watch 628

WW 628 SEVERE TSTM IA MN 112145Z – 120300Z

URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 628
NWS Storm Prediction Center Norman OK
445 PM CDT Fri Aug 11 2023

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
Northern Iowa
Southwest Minnesota

* Effective this Friday afternoon and evening from 445 PM until
1000 PM CDT.

* Primary threats include…
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible

SUMMARY…Scattered supercells may persist through late evening as
the storms spread southeastward from southwest Minnesota toward
northern Iowa. Large hail of 1-2 inches in diameter and wind damage
with 60-70 mph winds will be the main severe threats.

The severe thunderstorm watch area is approximately along and 60
statute miles east and west of a line from 15 miles west northwest
of Redwood Falls MN to 45 miles east southeast of Spencer IA. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU8).

PRECAUTIONARY/PREPAREDNESS ACTIONS…

REMEMBER…A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION…CONTINUE…WW 625…WW 626…WW 627…

AVIATION…A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
31030.

…Thompson

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