URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 341 NWS Storm Prediction Center Norman OK 720 PM MDT Tue Jul 7 2020 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of North central South Dakota * Effective this Tuesday night from 720 PM until Midnight MDT. * Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated very large hail events to 2 inches in diameter possible SUMMARY...A cluster of storms east of Rapid City will continue to spread northeastward through early tonight. The stronger embedded storms, which could have supercell structures, will be capable of producing damaging winds and isolated large hail. The severe thunderstorm watch area is approximately along and 35 statute miles east and west of a line from 40 miles northwest of Mobridge SD to 70 miles south of Mobridge SD. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 338...WW 339...WW 340... 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 550. Mean storm motion vector 23035. ...ThompsonRead more
from SPC Forecast Products http://www.spc.noaa.gov/products/watch/ww0341.html
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