521
WWUS20 KWNS 041901
SEL6
SPC WW 041901
MNZ000-NDZ000-SDZ000-050200-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 486
NWS Storm Prediction Center Norman OK
300 PM EDT Fri Jul 4 2025

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of
  Northern Minnesota
  Eastern North Dakota
  Northeastern South Dakota

* Effective this Friday afternoon and evening from 300 PM until
  1000 PM EDT.

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

SUMMARY...Thunderstorm coverage is expected to increase this
afternoon along a cold front arcing across northern MN, eastern ND,
and north-central SD. Strong buoyancy is in place ahead of this
front, fostering the potential for robust updrafts. Vertical shear
is modest across much of the area, which could limit storm
organization and promote a quick transition to a mostly linear mode.
The only exception is across north-central/northeast MN where
vertical shear should remain strong enough to support stronger, more
organized storm structures. Damaging gusts are the primary risk, but
isolated large to very large hail is also possible, particularly
over north-central/northeast MN.

The severe thunderstorm watch area is approximately along and 80
statute miles north and south of a line from 50 miles south of
Jamestown ND to 25 miles north northeast of Ely MN. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU6).

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.

&&

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
27030.

...Mosier