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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 45
NWS Storm Prediction Center Norman OK
735 PM EST Tue Feb 28 2017
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southern Lower Michigan
* Effective this Tuesday night and Wednesday morning from 735 PM
until 400 AM EST.
* 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
A tornado or two possible
SUMMARY...Multiple rounds of thunderstorms are expected to spread
across this region north of a warm front, offering the potential for
large hail and isolated strong-severe gusts. A tornado cannot be
ruled out later tonight over parts of northern Indiana as well, but
that threat is more conditional and uncertain at this time. See SPC
mesoscale discussion 222 for initial meteorological reasoning.
The severe thunderstorm watch area is approximately along and 55
statute miles north and south of a line from 30 miles southwest of
Benton Harbor MI to 15 miles east southeast of Detroit MI. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU5).
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
OTHER WATCH INFORMATION...CONTINUE...WW 41...WW 42...WW 43...WW
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 450. Mean storm motion vector