Severe Thunderstorm Watch - Lincoln, NE

[weatherwunder]

urgent - immediate broadcast requested Severe Thunderstorm Watch number 645 NWS Storm Prediction Center Norman OK 300 PM CDT Sat Jul 5 2003

The NWS Storm Prediction Center has issued a Severe Thunderstorm Watch for portions of

Far western Iowa Nebraska southern South Dakota

Effective this Saturday afternoon and evening from 300 PM until 1000 PM CDT.

Hail to 2 inches in diameter... thunderstorm wind gusts to 70 mph... and dangerous lightning are possible in these areas.

The Severe Thunderstorm Watch area is along and 155 statute miles east and west of a line from 60 miles northeast of Valentine Nebraska to 20 miles southeast of Grand Island Nebraska.

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 644...


Discussion... convection should develop rapidly over the next 1-2 hours over swrn SD and wrn neb as air mass continues to destabilize and large scale ascent increases ahead of fast moving shortwave trough. Isolated severe thunderstorms may also form within elevated area of convection now moving across nern neb. Mlcapes should strengthen into the 1500-2500 j/kg range through the early evening... with deep layer shear remaining supportive of supercells and organized lines/Bow echoes. Activity will likely evolve into a mcs by the mid evening.

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 25035.


... Evans

;432,0963 404,0950 404,1010 432,1024;

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