Storm Prediction Center Severe Thunderstorm Watch 424

Note: 
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for Watch Status Reports.

   SEL4

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 424
   NWS Storm Prediction Center Norman OK
   510 PM CDT Mon Jun 16 2025

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Far Northeast Colorado
     Western Iowa
     Far Northwest Kansas
     Nebraska

   * Effective this Monday afternoon from 510 PM until Midnight CDT.

   * Primary threats include...
     Scattered damaging winds and isolated significant gusts to 80
       mph likely
     Scattered large hail and isolated very large hail events to 3
       inches in diameter possible
     A tornado or two possible

   SUMMARY...Thunderstorm intensity and coverage is expected to
   increase across the region this afternoon/evening. Large to very
   large hail up to 3" in diameter is possible with the initial more
   cellular development. Development into one or more convective lines
   is possible as well, with damaging gusts up to 75-80 mph as the
   primary risk once this linear transition occurs.

   The severe thunderstorm watch area is approximately along and 60
   statute miles north and south of a line from 40 miles north
   northwest of Imperial NE to 25 miles east southeast of Denison IA.
   For a complete depiction of the watch see the associated watch
   outline update (WOUS64 KWNS WOU4).

   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 423...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   3 inches. Extreme turbulence and surface wind gusts to 70 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27030.

   ...Mosier

   SEL4

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 424
   NWS Storm Prediction Center Norman OK
   510 PM CDT Mon Jun 16 2025

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Far Northeast Colorado
     Western Iowa
     Far Northwest Kansas
     Nebraska

   * Effective this Monday afternoon from 510 PM until Midnight CDT.

   * Primary threats include...
     Scattered damaging winds and isolated significant gusts to 80
       mph likely
     Scattered large hail and isolated very large hail events to 3
       inches in diameter possible
     A tornado or two possible

   SUMMARY...Thunderstorm intensity and coverage is expected to
   increase across the region this afternoon/evening. Large to very
   large hail up to 3" in diameter is possible with the initial more
   cellular development. Development into one or more convective lines
   is possible as well, with damaging gusts up to 75-80 mph as the
   primary risk once this linear transition occurs.

   The severe thunderstorm watch area is approximately along and 60
   statute miles north and south of a line from 40 miles north
   northwest of Imperial NE to 25 miles east southeast of Denison IA.
   For a complete depiction of the watch see the associated watch
   outline update (WOUS64 KWNS WOU4).

   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 423...

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   3 inches. Extreme turbulence and surface wind gusts to 70 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   27030.

   ...Mosier

Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.

   SAW4 
   WW 424 SEVERE TSTM CO IA KS NE 162210Z - 170500Z
   AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
   40NNW IML/IMPERIAL NE/ - 25ESE DNS/DENISON IA/
   ..AVIATION COORDS.. 50NM N/S /48E SNY - 54NE OVR/
   HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..70 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27030.

   LAT...LON 41920191 42719493 40979493 40180191

   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU4.

Watch 424 Status Report Messages:

STATUS REPORT #2 ON WW 424

VALID 170245Z - 170340Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SE AIA TO
15 WNW BUB TO 25 WNW OLU TO 10 ESE OMA TO 40 WNW DSM.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1323

..WEINMAN..06/17/25

ATTN...WFO...BOU...DMX...FSD...OAX...GLD...GID...LBF...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

COC095-115-170340-

CO 
.    COLORADO COUNTIES INCLUDED ARE

PHILLIPS	     SEDGWICK		 
$$


IAC001-003-029-039-071-121-129-137-145-155-175-181-170340-

IA 
.    IOWA COUNTIES INCLUDED ARE

ADAIR		     ADAMS		 CASS		     
CLARKE		     FREMONT		 MADISON	     
MILLS		     MONTGOMERY 	 PAGE		     
POTTAWATTAMIE	     UNION		 WARREN 	     
$$


KSC023-039-065-137-147-153-179-193-170340-

KS 
.    KANSAS COUNTIES INCLUDED ARE

CHEYENNE	     DECATUR		 GRAHAM 	     
NORTON		     PHILLIPS		 RAWLINS	     
SHERIDAN	     THOMAS		 
$$


NEC001-005-009-019-023-025-029-035-041-047-049-055-057-063-065-
069-071-073-077-079-081-083-085-087-093-099-101-109-111-113-115-
117-121-125-131-135-137-143-145-153-155-159-163-175-185-
170340-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

ADAMS		     ARTHUR		 BLAINE 	     
BUFFALO 	     BUTLER		 CASS		     
CHASE		     CLAY		 CUSTER 	     
DAWSON		     DEUEL		 DOUGLAS	     
DUNDY		     FRONTIER		 FURNAS 	     
GARDEN		     GARFIELD		 GOSPER 	     
GREELEY 	     HALL		 HAMILTON	     
HARLAN		     HAYES		 HITCHCOCK	     
HOWARD		     KEARNEY		 KEITH		     
LANCASTER	     LINCOLN		 LOGAN		     
LOUP		     MCPHERSON		 MERRICK	     
NANCE		     OTOE		 PERKINS	     
PHELPS		     POLK		 RED WILLOW	     
SARPY		     SAUNDERS		 SEWARD 	     
SHERMAN 	     VALLEY		 YORK		     
$$


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 424

VALID 170025Z - 170140Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1320

..WEINMAN..06/17/25

ATTN...WFO...BOU...DMX...FSD...OAX...GLD...GID...LBF...

&&

STATUS REPORT FOR WS 424 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

COC095-115-170140-

CO 
.    COLORADO COUNTIES INCLUDED ARE

PHILLIPS	     SEDGWICK		 
$$


IAC001-003-009-021-025-027-029-035-047-073-077-085-093-129-133-
137-149-151-155-161-165-193-170140-

IA 
.    IOWA COUNTIES INCLUDED ARE

ADAIR		     ADAMS		 AUDUBON	     
BUENA VISTA	     CALHOUN		 CARROLL	     
CASS		     CHEROKEE		 CRAWFORD	     
GREENE		     GUTHRIE		 HARRISON	     
IDA		     MILLS		 MONONA 	     
MONTGOMERY	     PLYMOUTH		 POCAHONTAS	     
POTTAWATTAMIE	     SAC		 SHELBY 	     
WOODBURY	     
$$


KSC023-039-137-147-153-170140-

KS 
.    KANSAS COUNTIES INCLUDED ARE

CHEYENNE	     DECATUR		 NORTON 	     
PHILLIPS	     RAWLINS		 
$$


NEC001-003-005-009-011-017-019-021-023-025-029-035-037-039-041-
043-047-049-053-055-057-063-065-069-071-073-075-077-079-081-083-
085-087-089-091-093-099-101-109-111-113-115-117-119-121-125-135-
137-139-141-143-145-149-153-155-159-163-167-171-173-175-177-179-
183-185-170140-

NE 
.    NEBRASKA COUNTIES INCLUDED ARE

ADAMS		     ANTELOPE		 ARTHUR 	     
BLAINE		     BOONE		 BROWN		     
BUFFALO 	     BURT		 BUTLER 	     
CASS		     CHASE		 CLAY		     
COLFAX		     CUMING		 CUSTER 	     
DAKOTA		     DAWSON		 DEUEL		     
DODGE		     DOUGLAS		 DUNDY		     
FRONTIER	     FURNAS		 GARDEN 	     
GARFIELD	     GOSPER		 GRANT		     
GREELEY 	     HALL		 HAMILTON	     
HARLAN		     HAYES		 HITCHCOCK	     
HOLT		     HOOKER		 HOWARD 	     
KEARNEY 	     KEITH		 LANCASTER	     
LINCOLN 	     LOGAN		 LOUP		     
MCPHERSON	     MADISON		 MERRICK	     
NANCE		     PERKINS		 PHELPS 	     
PIERCE		     PLATTE		 POLK		     
RED WILLOW	     ROCK		 SARPY		     
SAUNDERS	     SEWARD		 SHERMAN	     
STANTON 	     THOMAS		 THURSTON	     
VALLEY		     WASHINGTON 	 WAYNE		     
WHEELER 	     YORK		 
$$


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.
$$

Note:
 Click for Complete Product Text.

Tornadoes

Wind

Hail

Combined Severe Hail/Wind

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.