SEL2

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 642
   NWS Storm Prediction Center Norman OK
   400 PM CDT Wed Aug 21 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Southeast Montana
     Western South Dakota

   * Effective this Wednesday afternoon and evening from 400 PM
     until 1100 PM CDT.

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

   SUMMARY...Thunderstorms will develop across southeast Montana and
   western South Dakota through the afternoon and evening.  The
   strongest cells may produce damaging winds and large hail.

   The severe thunderstorm watch area is approximately along and 55
   statute miles north and south of a line from 145 miles west
   northwest of Broadus MT to 25 miles north northeast of Philip SD.
   For a complete depiction of the watch see the associated watch
   outline update (WOUS64 KWNS WOU2).

   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 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   25030.

   ...Hart

   SEL2

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 642
   NWS Storm Prediction Center Norman OK
   400 PM CDT Wed Aug 21 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Southeast Montana
     Western South Dakota

   * Effective this Wednesday afternoon and evening from 400 PM
     until 1100 PM CDT.

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

   SUMMARY...Thunderstorms will develop across southeast Montana and
   western South Dakota through the afternoon and evening.  The
   strongest cells may produce damaging winds and large hail.

   The severe thunderstorm watch area is approximately along and 55
   statute miles north and south of a line from 145 miles west
   northwest of Broadus MT to 25 miles north northeast of Philip SD.
   For a complete depiction of the watch see the associated watch
   outline update (WOUS64 KWNS WOU2).

   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 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   25030.

   ...Hart

   WOUS64 KWNS 212056
   WOU2

   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 642
   NWS STORM PREDICTION CENTER NORMAN OK
   400 PM CDT WED AUG 21 2024

   SEVERE THUNDERSTORM WATCH 642 IS IN EFFECT UNTIL 1100 PM CDT
   FOR THE FOLLOWING LOCATIONS

   MTC011-017-025-065-075-087-103-220400-
   /O.NEW.KWNS.SV.A.0642.240821T2100Z-240822T0400Z/

   MT 
   .    MONTANA COUNTIES INCLUDED ARE

   CARTER               CUSTER              FALLON              
   MUSSELSHELL          POWDER RIVER        ROSEBUD             
   TREASURE             


   SDC007-019-033-047-055-063-071-081-093-095-102-103-105-121-137-
   220400-
   /O.NEW.KWNS.SV.A.0642.240821T2100Z-240822T0400Z/

   SD 
   .    SOUTH DAKOTA COUNTIES INCLUDED ARE

   BENNETT              BUTTE               CUSTER              
   FALL RIVER           HAAKON              HARDING             
   JACKSON              LAWRENCE            MEADE               
   MELLETTE             OGLALA LAKOTA       PENNINGTON          
   PERKINS              TODD                ZIEBACH             


   ATTN...WFO...BYZ...UNR...

   SAW2 
   WW 642 SEVERE TSTM MT SD 212100Z - 220400Z
   AXIS..55 STATUTE MILES NORTH AND SOUTH OF LINE..
   145WNW 4BQ/BROADUS MT/ - 25NNE PHP/PHILIP SD/
   ..AVIATION COORDS.. 50NM N/S /29NE BIL - 44SSE DPR/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 25030.

   LAT...LON 47000820 45180141 43590141 45400820

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU2.

Watch 642 Status Report Messages:

STATUS REPORT #4 ON WW 642

VALID 220300Z - 220440Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SSW PHP
TO 35 ESE 2WX TO 25 N 4BQ TO 5 N MLS.

..GOSS..08/22/24

ATTN...WFO...BYZ...UNR...

&&

STATUS REPORT FOR WS 642 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-220440-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
$$


SDC007-055-063-071-095-105-121-137-220440-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT 	     HAAKON		 HARDING	     
JACKSON 	     MELLETTE		 PERKINS	     
TODD		     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 #3 ON WW 642

VALID 220140Z - 220240Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 S RAP TO
40 SSE 2WX TO 20 NE GCC.

..GOSS..08/22/24

ATTN...WFO...BYZ...UNR...

&&

STATUS REPORT FOR WS 642 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-065-075-087-103-220240-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
MUSSELSHELL	     POWDER RIVER	 ROSEBUD	     
TREASURE	     
$$


SDC007-055-063-071-093-095-102-103-105-121-137-220240-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT 	     HAAKON		 HARDING	     
JACKSON 	     MEADE		 MELLETTE	     
OGLALA LAKOTA	     PENNINGTON 	 PERKINS	     
TODD		     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 #2 ON WW 642

VALID 220050Z - 220140Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..GOSS..08/22/24

ATTN...WFO...BYZ...UNR...

&&

STATUS REPORT FOR WS 642 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-065-075-087-103-220140-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
MUSSELSHELL	     POWDER RIVER	 ROSEBUD	     
TREASURE	     
$$


SDC007-019-033-047-055-063-071-081-093-095-102-103-105-121-137-
220140-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT 	     BUTTE		 CUSTER 	     
FALL RIVER	     HAAKON		 HARDING	     
JACKSON 	     LAWRENCE		 MEADE		     
MELLETTE	     OGLALA LAKOTA	 PENNINGTON	     
PERKINS 	     TODD		 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 642

VALID 212300Z - 220040Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..GOSS..08/21/24

ATTN...WFO...BYZ...UNR...

&&

STATUS REPORT FOR WS 642 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-065-075-087-103-220040-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
MUSSELSHELL	     POWDER RIVER	 ROSEBUD	     
TREASURE	     
$$


SDC007-019-033-047-055-063-071-081-093-095-102-103-105-121-137-
220040-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT 	     BUTTE		 CUSTER 	     
FALL RIVER	     HAAKON		 HARDING	     
JACKSON 	     LAWRENCE		 MEADE		     
MELLETTE	     OGLALA LAKOTA	 PENNINGTON	     
PERKINS 	     TODD		 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 NWS Public Alerts 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.