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Severe Thunderstorm Watch 646
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WW0646 Radar
Hazard Tornadoes EF2+ Tornadoes
Likelihood Low Very 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.
   SEL6

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 646
   NWS Storm Prediction Center Norman OK
   230 PM MDT Wed Sep 11 2019

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northeast Colorado
     Northwest Kansas
     Western and Central Nebraska
     Southeast Wyoming

   * Effective this Wednesday afternoon and evening from 230 PM
     until 1000 PM MDT.

   * Primary threats include...
     Widespread large hail and isolated very large hail events to 3
       inches in diameter likely
     Scattered damaging wind gusts to 70 mph likely
     A tornado or two possible

   SUMMARY...Thunderstorms are expected to rapidly develop this
   afternoon and overspread much of the watch area this afternoon and
   early evening.  Supercells capable of large, damaging hail are the
   main concern.  However, an isolated tornado or two cannot be ruled
   out.

   The severe thunderstorm watch area is approximately along and 95
   statute miles north and south of a line from 25 miles east of North
   Platte NE to 30 miles north of Cheyenne WY. For a complete depiction
   of the watch see the associated watch outline update (WOUS64 KWNS
   WOU6).

   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 645...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   3 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27030.

   ...Hart
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Page last modified: September 12, 2019
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