SEL1

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 421
   NWS Storm Prediction Center Norman OK
   455 PM MDT Sat Aug 8 2020

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     western and central Nebraska
     southwest South Dakota

   * Effective this Saturday afternoon and evening from 455 PM until
     1100 PM MDT.

   * Primary threats include...
     Scattered damaging winds and isolated significant gusts to 75
       mph possible
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible

   SUMMARY...Widely scattered to scattered storms including both
   multicells and a few supercells are expected to develop eastward
   through the central Plains this evening, posing a risk for damaging
   wind and large hail.

   The severe thunderstorm watch area is approximately along and 95
   statute miles east and west of a line from 70 miles north northeast
   of Rapid City SD to 35 miles south southwest of North Platte NE. 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.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27035.

   ...Dial

   SEL1

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 421
   NWS Storm Prediction Center Norman OK
   455 PM MDT Sat Aug 8 2020

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     western and central Nebraska
     southwest South Dakota

   * Effective this Saturday afternoon and evening from 455 PM until
     1100 PM MDT.

   * Primary threats include...
     Scattered damaging winds and isolated significant gusts to 75
       mph possible
     Scattered large hail and isolated very large hail events to 2
       inches in diameter possible

   SUMMARY...Widely scattered to scattered storms including both
   multicells and a few supercells are expected to develop eastward
   through the central Plains this evening, posing a risk for damaging
   wind and large hail.

   The severe thunderstorm watch area is approximately along and 95
   statute miles east and west of a line from 70 miles north northeast
   of Rapid City SD to 35 miles south southwest of North Platte NE. 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.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27035.

   ...Dial

   WOUS64 KWNS 082257
   WOU1

   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 421
   NWS STORM PREDICTION CENTER NORMAN OK
   455 PM MDT SAT AUG 8 2020

   SEVERE THUNDERSTORM WATCH 421 IS IN EFFECT UNTIL 1100 PM MDT
   FOR THE FOLLOWING LOCATIONS

   NEC005-007-009-013-017-031-033-041-045-049-069-075-091-101-103-
   105-111-113-115-117-123-135-149-157-161-165-171-090500-
   /O.NEW.KWNS.SV.A.0421.200808T2255Z-200809T0500Z/

   NE 
   .    NEBRASKA COUNTIES INCLUDED ARE

   ARTHUR               BANNER              BLAINE              
   BOX BUTTE            BROWN               CHERRY              
   CHEYENNE             CUSTER              DAWES               
   DEUEL                GARDEN              GRANT               
   HOOKER               KEITH               KEYA PAHA           
   KIMBALL              LINCOLN             LOGAN               
   LOUP                 MCPHERSON           MORRILL             
   PERKINS              ROCK                SCOTTS BLUFF        
   SHERIDAN             SIOUX               THOMAS              


   SDC007-033-047-055-071-081-093-095-102-103-121-123-137-090500-
   /O.NEW.KWNS.SV.A.0421.200808T2255Z-200809T0500Z/

   SD 
   .    SOUTH DAKOTA COUNTIES INCLUDED ARE

   BENNETT              CUSTER              FALL RIVER          
   HAAKON               JACKSON             LAWRENCE            
   MEADE                MELLETTE            OGLALA LAKOTA       
   PENNINGTON           TODD                TRIPP               
   ZIEBACH              


   ATTN...WFO...LBF...UNR...CYS...

   SAW1 
   WW 421 SEVERE TSTM NE SD 082255Z - 090500Z
   AXIS..95 STATUTE MILES EAST AND WEST OF LINE..
   70NNE RAP/RAPID CITY SD/ - 35SSW LBF/NORTH PLATTE NE/
   ..AVIATION COORDS.. 80NM E/W /34W DPR - 30SSW LBF/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..65 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27035.

   LAT...LON 44970056 40659912 40650275 44970445

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU1.

Watch 421 Status Report Messages:

STATUS REPORT #3 ON WW 421

VALID 090310Z - 090440Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SSE SNY
TO 45 E AIA TO 35 W VTN TO 35 WNW VTN TO 25 W PHP TO 30 NNW PHP
TO 40 WNW PIR.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1428

..DEAN..08/09/20

ATTN...WFO...LBF...CYS...UNR...

&&

STATUS REPORT FOR WS 421 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

NEC005-009-015-017-031-041-049-069-071-075-089-091-101-103-111-
113-115-117-135-149-171-183-090440-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

ARTHUR		     BLAINE		 BOYD		     
BROWN		     CHERRY		 CUSTER 	     
DEUEL		     GARDEN		 GARFIELD	     
GRANT		     HOLT		 HOOKER 	     
KEITH		     KEYA PAHA		 LINCOLN	     
LOGAN		     LOUP		 MCPHERSON	     
PERKINS 	     ROCK		 THOMAS 	     
WHEELER 	     
$$


SDC055-071-095-121-123-090440-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

HAAKON		     JACKSON		 MELLETTE	     
TODD		     TRIPP		 
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #2 ON WW 421

VALID 090205Z - 090340Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 WSW SNY
TO 20 SSW AIA TO 50 ENE AIA TO 50 ENE CDR TO 45 SSE RAP TO 45 S
Y22.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1428

..DEAN..08/09/20

ATTN...WFO...LBF...CYS...UNR...

&&

STATUS REPORT FOR WS 421 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

NEC005-009-017-031-033-041-049-069-075-091-101-103-111-113-115-
117-123-135-149-161-171-090340-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

ARTHUR		     BLAINE		 BROWN		     
CHERRY		     CHEYENNE		 CUSTER 	     
DEUEL		     GARDEN		 GRANT		     
HOOKER		     KEITH		 KEYA PAHA	     
LINCOLN 	     LOGAN		 LOUP		     
MCPHERSON	     MORRILL		 PERKINS	     
ROCK		     SHERIDAN		 THOMAS 	     
$$


SDC007-055-071-093-095-102-103-121-123-137-090340-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT 	     HAAKON		 JACKSON	     
MEADE		     MELLETTE		 OGLALA LAKOTA	     
PENNINGTON	     TODD		 TRIPP		     
ZIEBACH 	     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #1 ON WW 421

VALID 090055Z - 090140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 SSE TOR
TO 15 WNW AIA TO 45 SSW RAP TO 25 WSW RAP TO 10 NE RAP TO 45 SE
2WX.

..DEAN..08/09/20

ATTN...WFO...LBF...CYS...UNR...

&&

STATUS REPORT FOR WS 421 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

NEC005-007-009-013-017-031-033-041-045-049-069-075-091-101-103-
105-111-113-115-117-123-135-149-157-161-171-090140-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

ARTHUR		     BANNER		 BLAINE 	     
BOX BUTTE	     BROWN		 CHERRY 	     
CHEYENNE	     CUSTER		 DAWES		     
DEUEL		     GARDEN		 GRANT		     
HOOKER		     KEITH		 KEYA PAHA	     
KIMBALL 	     LINCOLN		 LOGAN		     
LOUP		     MCPHERSON		 MORRILL	     
PERKINS 	     ROCK		 SCOTTS BLUFF	     
SHERIDAN	     THOMAS		 
$$


SDC007-033-047-055-071-093-095-102-103-121-123-137-090140-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT 	     CUSTER		 FALL RIVER	     
HAAKON		     JACKSON		 MEADE		     
MELLETTE	     OGLALA LAKOTA	 PENNINGTON	     
TODD		     TRIPP		 ZIEBACH	     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

Please visit the National Weather Service Interactive Weather Information Network (IWIN) for more information on the warnings.

For each watch, probabilities for particular events inside the watch (listed above in each table) are determined by the issuing forecaster. The "Low" category contains probability values ranging from less than 2% to 20% (EF2-EF5 tornadoes), less than 5% to 20% (all other probabilities), "Moderate" from 30% to 60%, and "High" from 70% to greater than 95%. High values are bolded and lighter in color to provide awareness of an increased threat for a particular event.