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Tornado Watch 280
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WW0280 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Moderate Low
Severe Wind 65 kt+ Wind
Moderate Low
Severe Hail 2"+ Hail
High Moderate

Note:  The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.
Note: Click for Watch Status Reports.
   SEL0

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Tornado Watch Number 280
   NWS Storm Prediction Center Norman OK
   340 PM CDT Wed Jul 18 2018

   The NWS Storm Prediction Center has issued a

   * Tornado Watch for portions of 
     Northern Nebraska
     South Dakota

   * Effective this Wednesday afternoon and evening from 340 PM
     until 1100 PM CDT.

   * Primary threats include...
     A couple tornadoes possible
     Scattered large hail likely with isolated very large hail events
       to 2 inches in diameter possible
     Scattered damaging wind gusts to 70 mph possible

   SUMMARY...On the southern periphery of an upper-level system moving
   slowly eastward over the Dakotas, storms will continue to increase
   in coverage and intensity through the remainder of the afternoon
   into this evening. A relatively moist environment and strengthening
   winds aloft (reference 19Z Rapid City special observed sounding)
   will support supercells capable of large hail. A concern for a
   couple of tornadoes also exists especially along a warm front that
   extends across central/southern South Dakota into northern Nebraska.
   Otherwise, storms will eventually cluster and move southeastward
   across the region this evening with some increased potential for
   damaging winds.

   The tornado watch area is approximately along and 70 statute miles
   north and south of a line from 70 miles northwest of Philip SD to 45
   miles northeast of Oneill NE. For a complete depiction of the watch
   see the associated watch outline update (WOUS64 KWNS WOU0).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Tornado Watch means conditions are favorable for
   tornadoes and 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.

   &&

   AVIATION...Tornadoes and 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 29025.

   ...Guyer
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Page last modified: July 19, 2018
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