URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 218
NWS Storm Prediction Center Norman OK
950 PM CDT Mon May 15 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Far northeast Iowa
Southern Minnesota
Western Wisconsin
* Effective this Monday night and Tuesday morning from 950 PM
until 300 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
SUMMARY...Atop a relatively stable near-surface layer, elevated
thunderstorms will continue to increase and pose mostly a large hail
threat through the late evening and overnight hours.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 40 miles northwest of
Fairmont MN to 45 miles east of La Crosse WI. 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 213...WW 214...WW
215...WW 216...WW 217...
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 550. Mean storm motion vector
25030.
...Guyer
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