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The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
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Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 401
NWS Storm Prediction Center Norman OK
120 PM MDT Tue Jun 27 2023
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western South Dakota
Northeast Wyoming
* Effective this Tuesday afternoon and evening from 120 PM until
800 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 3
inches in diameter possible
SUMMARY...A few supercells should develop and spread east across the
Black Hills vicinity through early evening. Primary threat will be
large hail.
The severe thunderstorm watch area is approximately along and 60
statute miles north and south of a line from 80 miles west northwest
of Rapid City SD to 50 miles east southeast of Philip SD. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU1).
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 400...
AVIATION...A few severe thunderstorms with hail surface and aloft to
3 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26030.
...Grams
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 401 SEVERE TSTM SD WY 271920Z - 280200Z
AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
80WNW RAP/RAPID CITY SD/ - 50ESE PHP/PHILIP SD/
..AVIATION COORDS.. 50NM N/S /73WNW RAP - 44SSW PIR/
HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..65 KNOTS.
MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26030.
LAT...LON 45350455 44640067 42900067 43610455
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 401 Status Report Messages:
STATUS REPORT #6 ON WW 401
VALID 280140Z - 280240Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 N CDR TO
65 S Y22.
..LYONS..06/28/23
ATTN...WFO...UNR...
&&
STATUS REPORT FOR WS 401
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC007-055-071-095-121-123-137-280240-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT HAAKON JACKSON
MELLETTE TODD TRIPP
ZIEBACH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #5 ON WW 401
VALID 280040Z - 280140Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SE 4BQ TO
45 SSW Y22.
..THORNTON..06/28/23
ATTN...WFO...UNR...
&&
STATUS REPORT FOR WS 401
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC007-019-033-047-055-063-071-093-095-102-103-105-121-137-
280140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON HARDING
JACKSON MEADE MELLETTE
OGLALA LAKOTA PENNINGTON PERKINS
TODD ZIEBACH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #4 ON WW 401
VALID 272335Z - 280040Z
SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 40 SE 4BQ TO
45 SSW Y22.
FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 1310
..THORNTON..06/27/23
ATTN...WFO...UNR...
&&
STATUS REPORT FOR WS 401
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC007-019-033-047-055-071-093-095-102-103-121-137-280040-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON JACKSON
MEADE MELLETTE OGLALA LAKOTA
PENNINGTON TODD ZIEBACH
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #3 ON WW 401
VALID 272125Z - 272240Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..THORNTON..06/27/23
ATTN...WFO...UNR...
&&
STATUS REPORT FOR WS 401
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC007-019-033-047-055-063-071-081-093-095-102-103-105-121-137-
272240-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON HARDING
JACKSON LAWRENCE MEADE
MELLETTE OGLALA LAKOTA PENNINGTON
PERKINS TODD ZIEBACH
$$
WYC011-045-272240-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK WESTON
$$
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.
$$
STATUS REPORT #2 ON WW 401
VALID 272025Z - 272140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..KERR..06/27/23
ATTN...WFO...UNR...
&&
STATUS REPORT FOR WS 401
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC007-019-033-047-055-071-081-093-095-102-103-121-137-272140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON JACKSON
LAWRENCE MEADE MELLETTE
OGLALA LAKOTA PENNINGTON TODD
ZIEBACH
$$
WYC011-045-272140-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK WESTON
$$
THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY. PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$
STATUS REPORT #1 ON WW 401
VALID 272020Z - 272140Z
THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.
..THORNTON..06/27/23
ATTN...WFO...UNR...
&&
STATUS REPORT FOR WS 401
SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS
SDC007-019-033-047-055-071-081-093-095-102-103-121-137-272140-
SD
. SOUTH DAKOTA COUNTIES INCLUDED ARE
BENNETT BUTTE CUSTER
FALL RIVER HAAKON JACKSON
LAWRENCE MEADE MELLETTE
OGLALA LAKOTA PENNINGTON TODD
ZIEBACH
$$
WYC011-045-272140-
WY
. WYOMING COUNTIES INCLUDED ARE
CROOK WESTON
$$
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
|
Mod (30%)
|
Hail
Probability of 10 or more severe hail events
|
Mod (50%)
|
Probability of 1 or more hailstones > 2 inches
|
Mod (50%)
|
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
|
High (80%)
|
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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