SEL0

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 640
   NWS Storm Prediction Center Norman OK
   250 PM MDT Mon Aug 19 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northeast Idaho
     Western and Central Montana

   * Effective this Monday afternoon and evening from 250 PM until
     1000 PM MDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph possible
     Isolated large hail events to 1.5 inches in diameter possible

   SUMMARY...Thunderstorms are forming over the mountains of northern
   Idaho and western Montana.  These storms will intensify and organize
   through the afternoon and spread northeastward across the watch
   area.  Damaging wind gusts will be possible in the strongest storms.

   The severe thunderstorm watch area is approximately along and 70
   statute miles east and west of a line from 35 miles east southeast
   of Salmon ID to 35 miles northeast of Cut Bank MT. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU0).

   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 639...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   23025.

   ...Hart

   SEL0

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 640
   NWS Storm Prediction Center Norman OK
   250 PM MDT Mon Aug 19 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northeast Idaho
     Western and Central Montana

   * Effective this Monday afternoon and evening from 250 PM until
     1000 PM MDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph possible
     Isolated large hail events to 1.5 inches in diameter possible

   SUMMARY...Thunderstorms are forming over the mountains of northern
   Idaho and western Montana.  These storms will intensify and organize
   through the afternoon and spread northeastward across the watch
   area.  Damaging wind gusts will be possible in the strongest storms.

   The severe thunderstorm watch area is approximately along and 70
   statute miles east and west of a line from 35 miles east southeast
   of Salmon ID to 35 miles northeast of Cut Bank MT. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU0).

   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 639...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   23025.

   ...Hart

   WOUS64 KWNS 192046
   WOU0

   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 640
   NWS STORM PREDICTION CENTER NORMAN OK
   250 PM MDT MON AUG 19 2024

   SEVERE THUNDERSTORM WATCH 640 IS IN EFFECT UNTIL 1000 PM MDT
   FOR THE FOLLOWING LOCATIONS

   IDC059-200400-
   /O.NEW.KWNS.SV.A.0640.240819T2050Z-240820T0400Z/

   ID 
   .    IDAHO COUNTIES INCLUDED ARE

   LEMHI                


   MTC001-007-013-015-023-027-029-031-035-039-041-043-045-047-049-
   051-057-059-063-073-077-081-093-099-101-200400-
   /O.NEW.KWNS.SV.A.0640.240819T2050Z-240820T0400Z/

   MT 
   .    MONTANA COUNTIES INCLUDED ARE

   BEAVERHEAD           BROADWATER          CASCADE             
   CHOUTEAU             DEER LODGE          FERGUS              
   FLATHEAD             GALLATIN            GLACIER             
   GRANITE              HILL                JEFFERSON           
   JUDITH BASIN         LAKE                LEWIS AND CLARK     
   LIBERTY              MADISON             MEAGHER             
   MISSOULA             PONDERA             POWELL              
   RAVALLI              SILVER BOW          TETON               
   TOOLE                


   ATTN...WFO...MSO...TFX...

   SAW0 
   WW 640 SEVERE TSTM ID MT 192050Z - 200400Z
   AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
   35ESE SMN/SALMON ID/ - 35NE CTB/CUT BANK MT/
   ..AVIATION COORDS.. 60NM E/W /34SW DLN - 54SE YQL/
   HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 23025.

   LAT...LON 44921465 48971338 48971029 44921179

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU0.

Watch 640 Status Report Messages:

STATUS REPORT #4 ON WW 640

VALID 200205Z - 200340Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SE GTF TO
35 SW GTF TO 10 ESE 3DU TO 50 NW SMN.

..GOSS..08/20/24

ATTN...WFO...MSO...TFX...

&&

STATUS REPORT FOR WS 640 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC013-015-027-029-035-039-041-045-047-049-051-063-073-077-081-
099-101-200340-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CASCADE 	     CHOUTEAU		 FERGUS 	     
FLATHEAD	     GLACIER		 GRANITE	     
HILL		     JUDITH BASIN	 LAKE		     
LEWIS AND CLARK      LIBERTY		 MISSOULA	     
PONDERA 	     POWELL		 RAVALLI	     
TETON		     TOOLE		 
$$


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 640

VALID 200140Z - 200240Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 50 NW SMN TO
10 ESE 3DU TO 35 SW GTF TO 35 SE GTF.

..GOSS..08/20/24

ATTN...WFO...MSO...TFX...

&&

STATUS REPORT FOR WS 640 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC013-015-027-029-035-039-041-045-047-049-051-063-073-077-081-
099-101-200240-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CASCADE 	     CHOUTEAU		 FERGUS 	     
FLATHEAD	     GLACIER		 GRANITE	     
HILL		     JUDITH BASIN	 LAKE		     
LEWIS AND CLARK      LIBERTY		 MISSOULA	     
PONDERA 	     POWELL		 RAVALLI	     
TETON		     TOOLE		 
$$


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 640

VALID 200050Z - 200140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 WNW SMN
TO 30 S 3DU TO 25 W HLN TO 15 NE HLN TO 45 ENE HLN.

..GOSS..08/20/24

ATTN...WFO...MSO...TFX...

&&

STATUS REPORT FOR WS 640 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC013-015-027-029-035-039-041-045-047-049-051-063-073-077-081-
099-101-200140-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CASCADE 	     CHOUTEAU		 FERGUS 	     
FLATHEAD	     GLACIER		 GRANITE	     
HILL		     JUDITH BASIN	 LAKE		     
LEWIS AND CLARK      LIBERTY		 MISSOULA	     
PONDERA 	     POWELL		 RAVALLI	     
TETON		     TOOLE		 
$$


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 640

VALID 192350Z - 200040Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..GOSS..08/19/24

ATTN...WFO...MSO...TFX...

&&

STATUS REPORT FOR WS 640 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

IDC059-200040-

ID 
.    IDAHO COUNTIES INCLUDED ARE

LEMHI		     
$$


MTC001-007-013-015-023-027-029-031-035-039-041-043-045-047-049-
051-057-059-063-073-077-081-093-099-101-200040-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BEAVERHEAD	     BROADWATER 	 CASCADE	     
CHOUTEAU	     DEER LODGE 	 FERGUS 	     
FLATHEAD	     GALLATIN		 GLACIER	     
GRANITE 	     HILL		 JEFFERSON	     
JUDITH BASIN	     LAKE		 LEWIS AND CLARK     
LIBERTY 	     MADISON		 MEAGHER	     
MISSOULA	     PONDERA		 POWELL 	     
RAVALLI 	     SILVER BOW 	 TETON		     
TOOLE		     
$$


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.