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ALL SPC Mesoscale Analysis Curently in Effect
U.S. Tornado, Severe Thunderstorm & Fire Wx Alerts

WW 273 SEVERE TSTM SD 042225Z - 050600Z
WW 0273 Image

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 273
NWS Storm Prediction Center Norman OK
525 PM CDT Thu Jun 4 2026

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Central and Eastern South Dakota

* Effective this Thursday afternoon and Friday morning from 525
  PM until 100 AM 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
  A tornado or two possible

SUMMARY...Severe storms including a few supercells may develop
through early evening across central and east-central South Dakota,
mostly north of the I-90 corridor. Additional severe storms,
potentially as an organized line of storms, may move into the region
by late evening and the early overnight with damaging wind/hail
potential.

The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 50 miles west southwest
of Pierre SD to 15 miles south southeast of Brookings SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU3).

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 272...

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
27025.

...Guyer

  WW 0273 Status Updates
WW 0273 Status Image

STATUS REPORT ON WW 273

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..LYONS..06/05/26

ATTN...WFO...FSD...ABR...UNR...


STATUS REPORT FOR WS 273 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

SDC003-005-011-015-017-023-025-029-035-039-041-043-049-053-057-
059-065-069-073-075-077-079-085-095-097-101-107-111-115-117-119-
121-123-050240-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

AURORA               BEADLE              BROOKINGS           
BRULE                BUFFALO             CHARLES MIX         
CLARK                CODINGTON           DAVISON             
DEUEL                DEWEY               DOUGLAS             
FAULK                GREGORY             HAMLIN              
HAND                 HUGHES              HYDE                
JERAULD              JONES               KINGSBURY           
LAKE                 LYMAN               MELLETTE            
MINER                MOODY               POTTER              
SANBORN              SPINK               STANLEY             
SULLY                TODD                TRIPP               


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.

  WW 0272 Status Updates
WW 0272 Status Image

STATUS REPORT ON WW 272

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 60 NNE DGW
TO 50 NW RAP TO 10 SSW DIK.

..LYONS..06/05/26

ATTN...WFO...BYZ...GGW...BIS...UNR...


STATUS REPORT FOR WS 272 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

NDC001-041-050240-

ND 
.    NORTH DAKOTA COUNTIES INCLUDED ARE

ADAMS                HETTINGER           


SDC007-033-047-055-071-081-093-102-103-105-137-050240-

SD 
.    SOUTH DAKOTA COUNTIES INCLUDED ARE

BENNETT              CUSTER              FALL RIVER          
HAAKON               JACKSON             LAWRENCE            
MEADE                OGLALA LAKOTA       PENNINGTON          
PERKINS              ZIEBACH             


WYC045-050240-

WY 
.    WYOMING COUNTIES INCLUDED ARE

WESTON               
  MD 0984 CONCERNING SEVERE THUNDERSTORM WATCH 272...273... FOR PARTS OF SOUTH-CENTRAL SD INTO NORTHWEST/NORTH-CENTRAL NE
MD 0984 Image

Mesoscale Discussion 0984
NWS Storm Prediction Center Norman OK
0947 PM CDT Thu Jun 04 2026

Areas affected...Parts of south-central SD into
northwest/north-central NE

Concerning...Severe Thunderstorm Watch 272...273...

Valid 050247Z - 050445Z

The severe weather threat for Severe Thunderstorm Watch 272, 273
continues.

SUMMARY...A threat for severe gusts, isolated hail, and perhaps a
tornado will continue into late evening.

DISCUSSION...A small but intense storm cluster has evolved this
evening from western Cherry County, NE into Todd County, SD, in the
vicinity of a surface boundary that extends into
south-central/southeast SD. The KLNX VWP shows a notable increase in
0-1 km flow over the last 1-2 hours, which may help to sustain this
cluster as it moves across a corridor of relatively rich low-level
moisture and moderate buoyancy. Severe wind gusts appear to be the
primary hazard, though isolated hail and a brief tornado also cannot
be ruled out with any transient embedded supercells. Some severe
threat may continue just to the south of WW 273, though limited
spatial coverage of the threat across far northern NE may preclude
additional watch issuance. 

Farther north, a recent increase in storm coverage/intensity has
been noted west of Pierre, SD, as outflow associated with earlier
western SD convection begins to impinge upon stronger buoyancy.
Stronger updrafts within this developing convection may produce
hail, while a larger-scale threat for severe gusts may evolve if
substantial upscale growth occurs.

..Dean/Guyer.. 06/05/2026

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...FSD...ABR...LBF...UNR...

LAT...LON   44670087 44929952 44849839 44339797 43569816 43069832
            42809857 42579914 42479993 42510066 42560121 42610168
            42930192 43250146 43490118 44670087 

MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
MOST PROBABLE PEAK WIND GUST...65-80 MPH
MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN

  SPC 0100Z Day 1 Outlook
Day 1 Outlook Image
Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
0757 PM CDT Thu Jun 04 2026

Valid 050100Z - 051200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
THE NORTHERN PLAINS...

...SUMMARY...
Severe thunderstorms capable of large to very large hail and
damaging winds are possible this evening across much of South Dakota
into parts of northern Nebraska and south-central Minnesota.
Isolated large hail and severe wind gusts will also be possible in
parts of the central Plains and mid Missouri Valley.

...Northern Plains/Upper Mississippi Valley...
At mid-levels, west-southwesterly flow is evident over much of the
north-central U.S. A shortwave trough is evident on water vapor
imagery over the far western Dakotas. At the surface, a 1002 mb low
is analyzed in eastern Wyoming with a quasi-stationary front
extending northeastward into central South Dakota and north-central
Minnesota. An axis of low-level moisture is located from near the
Black Hills east-northeastward across South Dakota into
south-central Minnesota, where surface dewpoints are in the lower to
mid 60s F. Along and near this axis, the RAP has MLCAPE mostly in
the 1500 to 2500 J/kg range. Scattered strong to severe
thunderstorms are ongoing near the instability axis in the vicinity
of the Black Hills in southwestern South Dakota. The latest 00Z
sounding at Rapid City has 0-6 km shear around 50 knots with 700-500
mb lapse rates near 8 C/km. This will support supercells with large
hail. Hailstones of greater than 2 inches in diameter will be
possible for a few more hours this evening. The wind-damage threat
will likely increase if a cell cluster can become organized and move
into central South Dakota later this evening...see MCD 983. The
southern edge of any cluster could impact parts of northern Nebraska
later this evening.

Further east into eastern South Dakota, a cluster of strong to
severe thunderstorms is ongoing. The 00Z sounding at Aberdeen has
MUCAPE around 1800 J/kg with 0-6 km shear near 40 knots, and a
700-500 mb lapse rate just above 7 C/km. This should support
supercells with large hail early this evening. 0-3 km lapse rates
near 7.5 C/km will also be favorable for severe wind gusts. The
severe threat is expected to increase in southeast and central
Minnesota later this evening, as the storms in eastern South Dakota
move along the instability axis.

...Central Plains/Mid Missouri Valley...
A mid-level shortwave trough is evident on water vapor imagery over
eastern Kansas. At the surface, a moist airmass is in place from
much of central and eastern Kansas northeastward into Iowa, where
surface dewpoints are in the upper 60s to near 70 F. Moderate to
strong instability is analyzed by the RAP from central Kansas into
far western Missouri. Scattered thunderstorms are ongoing along the
northern edge of the stronger instability from northeast Kansas into
southwest Iowa. These storms are being supported by a low-level
speed max of 35 to 45 knots, and could be associated with a threat
for isolated severe wind gusts and hail this evening. As low-level
flow increases from this evening into the overnight period, the
redevelopment of storms may occur over parts of central and eastern
Kansas, where a continued marginal severe threat will be possible.

..Broyles.. 06/05/2026

 






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