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URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 207
NWS Storm Prediction Center Norman OK
355 PM CDT Sat Jun 23 2018
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Parts of central and western Oklahoma
Extreme northwest Texas
* Effective this Saturday afternoon and evening from 355 PM until
1000 PM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2.5
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Thunderstorm development is expected in the next couple of
hours along a stalled boundary near I-40, from the southern Oklahoma
City metro area westward. The storm environment favors supercells
capable of producing very large hail and damaging winds. A modest
increase in low-level shear this evening could also support the
threat for an isolated tornado, though this threat is secondary to
the hail and wind. Some clustering of storms and southward
movement/development will be possible later this evening across the
southern portions of the watch area.
The severe thunderstorm watch area is approximately along and 50
statute miles north and south of a line from 30 miles west southwest
of Clinton OK to 50 miles north northeast of Ardmore OK. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU7).
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 205...WW 206...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector