Today is forecast to be nearly the same temperature as yesterday.
Nowcast as of 2:44 PM EDT on May 21, 2013
Through 5 PM EDT (4 PM cdt)...scattered showers and thunderstorms will continue to develop across the Cumberland Plateau...and move east at 25 mph. Other isolated showers and storms will also develop over the higher terrain of southeast Tennessee into southwestern parts of North Carolina. A few strong to severe storms are possible with damaging winds up to 60 mph...as well as hail up to one inch in diameter.
Forecast for Ozone
Updated: 11:00 AM EDT on May 21, 2013
Severe Thunderstorm Watch 206 in effect until 10 PM EDT this evening...
Partly cloudy with a chance of a thunderstorm and a chance of rain in the afternoon. High of 86F. Winds from the SW at 5 to 15 mph. Chance of rain 40%.
* Severe Thunderstorm Watch for portions of eastern Kentucky southern Ohio eastern Tennessee southwest Virginia southwestern West Virginia
* effective this Tuesday afternoon and evening from 330 PM until 1000 PM EDT.
* Primary threats include... several damaging wind gusts to 70 mph likely a few large hail events to 1.5 inches in diameter possible
The Severe Thunderstorm Watch area is approximately along and 85 statute miles east and west of a line from 55 miles north of Jackson Kentucky to 55 miles south of Knoxville Tennessee. 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 tornadoes.
Discussion... thunderstorm activity along an east northeastward advancing surface cold pool has been fluctuating in intensity the past few hours... but... in the peak afternoon heating... sustained intensification appears possible during the next few hours as it progresses into the western slopes of the central Appalachians. The moist boundary layer feeding into storms is rather unstable with sizable cape... and modest... 20-30 kt... southwesterly deep layer mean flow... may contribute to system propagation across eastern Kentucky late this afternoon. Some acceleration appears possible... along with perhaps more widespread strong surface gusts... some of which may continue to exceed severe limits.
Aviation... a few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26035.
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