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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 276
NWS Storm Prediction Center Norman OK
350 PM CDT Thu Jun 17 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
North-central and northeast Iowa
Southwest to south-central Wisconsin
* Effective this Thursday afternoon and evening from 350 PM until
1000 PM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 80
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...A couple supercells may emanate out of a swath of
pre-frontal high-based thunderstorms, or they may consolidate into
an east-southeast moving cluster through mid-evening.
The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 5 miles north northwest
of Camp Douglas WI to 45 miles east southeast of Fort Dodge IA. For
a complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).
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
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector