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 184
NWS Storm Prediction Center Norman OK
600 PM CDT Mon Apr 28 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northwest Iowa
Northeast Nebraska
Southeast South Dakota
* Effective this Monday evening from 600 PM until 1100 PM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Multiple supercells along and near a cold front should
pose a threat for mainly large hail up to 1-2 inches in diameter
through the evening. Occasional severe/damaging winds may also
occur.
The severe thunderstorm watch area is approximately along and 45
statute miles north and south of a line from 45 miles west southwest
of Yankton SD to 20 miles south of Spencer 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 180...WW 181...WW
182...WW 183...
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
26040.
...Gleason
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW4
WW 184 SEVERE TSTM IA NE SD 282300Z - 290400Z
AXIS..45 STATUTE MILES NORTH AND SOUTH OF LINE..
45WSW YKN/YANKTON SD/ - 20S SPW/SPENCER IA/
..AVIATION COORDS.. 40NM N/S /25ENE ONL - 41WNW FOD/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26040.
LAT...LON 43329820 43539515 42239515 42029820
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU4.
Watch 184 Status Report Messages:
STATUS REPORT #3 ON WW 184
VALID 290145Z - 290240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NW DNS TO
SPW.
..SPC..04/29/25
ATTN...WFO...FSD...OAX...
&&
STATUS REPORT FOR WS 184
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-041-059-290240-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CLAY DICKINSON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #2 ON WW 184
VALID 290105Z - 290240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SSW SUX
TO 40 NNE SUX TO 10 S OTG.
..SPC..04/29/25
ATTN...WFO...FSD...OAX...
&&
STATUS REPORT FOR WS 184
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-035-041-059-093-141-143-149-193-290240-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CHEROKEE CLAY
DICKINSON IDA O'BRIEN
OSCEOLA PLYMOUTH WOODBURY
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 184
VALID 282345Z - 290040Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..SPC..04/28/25
ATTN...WFO...FSD...OAX...
&&
STATUS REPORT FOR WS 184
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
IAC021-035-041-059-093-119-141-143-149-167-193-290040-
IA
. IOWA COUNTIES INCLUDED ARE
BUENA VISTA CHEROKEE CLAY
DICKINSON IDA LYON
O'BRIEN OSCEOLA PLYMOUTH
SIOUX WOODBURY
$$
NEC003-027-043-051-107-139-173-179-290040-
NE
. NEBRASKA COUNTIES INCLUDED ARE
ANTELOPE CEDAR DAKOTA
DIXON KNOX PIERCE
THURSTON WAYNE
$$
SDC009-027-067-083-125-127-135-290040-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BON HOMME CLAY HUTCHINSON
LINCOLN TURNER UNION
YANKTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
Note:
Click for Complete Product Text.
Tornadoes
Probability of 2 or more tornadoes
|
Low (10%)
|
Probability of 1 or more strong (EF2-EF5) tornadoes
|
Low (5%)
|
Wind
Probability of 10 or more severe wind events
|
Mod (40%)
|
Probability of 1 or more wind events > 65 knots
|
Low (20%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (30%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (70%)
|
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.
weather.gov 
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