SEL9

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 439
   NWS Storm Prediction Center Norman OK
   120 PM MDT Thu Jun 20 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northeast Colorado
     Nebraska Panhandle
     Southwest South Dakota
     Southeast Wyoming

   * Effective this Thursday afternoon and evening from 120 PM until
     700 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 2.5
       inches in diameter possible
     A tornado or two possible

   SUMMARY...Thunderstorms will intensify this afternoon over southeast
   Wyoming and northeast Colorado and spread eastward through the early
   evening.  Supercells capable of very large hail and damaging wind
   gusts are the main concern.  An isolated tornado and/or landspout or
   two is also possible.

   The severe thunderstorm watch area is approximately along and 95
   statute miles north and south of a line from 40 miles northwest of
   Cheyenne WY to 35 miles east northeast of Alliance NE. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU9).

   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 438...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27030.

   ...Hart

   SEL9

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 439
   NWS Storm Prediction Center Norman OK
   120 PM MDT Thu Jun 20 2024

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Northeast Colorado
     Nebraska Panhandle
     Southwest South Dakota
     Southeast Wyoming

   * Effective this Thursday afternoon and evening from 120 PM until
     700 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 2.5
       inches in diameter possible
     A tornado or two possible

   SUMMARY...Thunderstorms will intensify this afternoon over southeast
   Wyoming and northeast Colorado and spread eastward through the early
   evening.  Supercells capable of very large hail and damaging wind
   gusts are the main concern.  An isolated tornado and/or landspout or
   two is also possible.

   The severe thunderstorm watch area is approximately along and 95
   statute miles north and south of a line from 40 miles northwest of
   Cheyenne WY to 35 miles east northeast of Alliance NE. For a
   complete depiction of the watch see the associated watch outline
   update (WOUS64 KWNS WOU9).

   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 438...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   2.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27030.

   ...Hart

   WOUS64 KWNS 201921
   WOU9

   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 439
   NWS STORM PREDICTION CENTER NORMAN OK
   120 PM MDT THU JUN 20 2024

   SEVERE THUNDERSTORM WATCH 439 IS IN EFFECT UNTIL 700 PM MDT
   FOR THE FOLLOWING LOCATIONS

   COC075-087-115-123-210100-
   /O.NEW.KWNS.SV.A.0439.240620T1920Z-240621T0100Z/

   CO 
   .    COLORADO COUNTIES INCLUDED ARE

   LOGAN                MORGAN              SEDGWICK            
   WELD                 


   NEC007-013-033-045-049-069-105-123-157-161-165-210100-
   /O.NEW.KWNS.SV.A.0439.240620T1920Z-240621T0100Z/

   NE 
   .    NEBRASKA COUNTIES INCLUDED ARE

   BANNER               BOX BUTTE           CHEYENNE            
   DAWES                DEUEL               GARDEN              
   KIMBALL              MORRILL             SCOTTS BLUFF        
   SHERIDAN             SIOUX               


   SDC047-102-210100-
   /O.NEW.KWNS.SV.A.0439.240620T1920Z-240621T0100Z/

   SD 
   .    SOUTH DAKOTA COUNTIES INCLUDED ARE

   FALL RIVER           OGLALA LAKOTA       


   WYC009-015-021-027-031-210100-
   /O.NEW.KWNS.SV.A.0439.240620T1920Z-240621T0100Z/

   WY 
   .    WYOMING COUNTIES INCLUDED ARE

   CONVERSE             GOSHEN              LARAMIE             
   NIOBRARA             PLATTE              


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

   SAW9 
   WW 439 SEVERE TSTM CO NE SD WY 201920Z - 210100Z
   AXIS..95 STATUTE MILES NORTH AND SOUTH OF LINE..
   40NW CYS/CHEYENNE WY/ - 35ENE AIA/ALLIANCE NE/
   ..AVIATION COORDS.. 80NM N/S /21NE LAR - 62ENE BFF/
   HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..65 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27030.

   LAT...LON 42930537 43620217 40870217 40180537

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU9.

Watch 439 Status Report Messages:

STATUS REPORT #4 ON WW 439

VALID 210040Z - 210140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NE DEN TO
40 WNW AKO TO 20 W SNY TO 20 NW SNY TO 20 SSE AIA TO 35 ENE AIA
TO 50 ENE AIA.

..WENDT..06/21/24

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

&&

STATUS REPORT FOR WS 439 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

COC075-087-115-123-210140-

CO 
.    COLORADO COUNTIES INCLUDED ARE

LOGAN		     MORGAN		 SEDGWICK	     
WELD		     
$$


NEC033-049-069-123-210140-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

CHEYENNE	     DEUEL		 GARDEN 	     
MORRILL 	     
$$


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 439

VALID 202350Z - 210040Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 15 NNW DEN
TO 40 E FCL TO 40 E CYS TO 20 SW BFF TO 15 WSW AIA TO 20 NNE AIA
TO 30 ENE CDR TO 35 S PHP.

..WENDT..06/20/24

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

&&

STATUS REPORT FOR WS 439 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

COC075-087-115-123-210040-

CO 
.    COLORADO COUNTIES INCLUDED ARE

LOGAN		     MORGAN		 SEDGWICK	     
WELD		     
$$


NEC007-033-049-069-105-123-161-210040-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

BANNER		     CHEYENNE		 DEUEL		     
GARDEN		     KIMBALL		 MORRILL	     
SHERIDAN	     
$$


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 439

VALID 202220Z - 202340Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1347

..WENDT..06/20/24

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

&&

STATUS REPORT FOR WS 439 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

COC075-087-115-123-202340-

CO 
.    COLORADO COUNTIES INCLUDED ARE

LOGAN		     MORGAN		 SEDGWICK	     
WELD		     
$$


NEC007-013-033-045-049-069-105-123-157-161-165-202340-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

BANNER		     BOX BUTTE		 CHEYENNE	     
DAWES		     DEUEL		 GARDEN 	     
KIMBALL 	     MORRILL		 SCOTTS BLUFF	     
SHERIDAN	     SIOUX		 
$$


SDC047-102-202340-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

FALL RIVER	     OGLALA LAKOTA	 
$$


WYC009-015-021-027-031-202340-

WY 
.    WYOMING COUNTIES INCLUDED ARE

CONVERSE	     GOSHEN		 LARAMIE	     
NIOBRARA	     PLATTE		 
$$


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 439

VALID 202025Z - 202140Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..LYONS..06/20/24

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

&&

STATUS REPORT FOR WS 439 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

COC075-087-115-123-202140-

CO 
.    COLORADO COUNTIES INCLUDED ARE

LOGAN		     MORGAN		 SEDGWICK	     
WELD		     
$$


NEC007-013-033-045-049-069-105-123-157-161-165-202140-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

BANNER		     BOX BUTTE		 CHEYENNE	     
DAWES		     DEUEL		 GARDEN 	     
KIMBALL 	     MORRILL		 SCOTTS BLUFF	     
SHERIDAN	     SIOUX		 
$$


SDC047-102-202140-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

FALL RIVER	     OGLALA LAKOTA	 
$$


WYC009-015-021-027-031-202140-

WY 
.    WYOMING COUNTIES INCLUDED ARE

CONVERSE	     GOSHEN		 LARAMIE	     
NIOBRARA	     PLATTE		 
$$


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.