Source: US National Oceanic and Atmospheric Administration
Note: The expiration time in the watch graphic is amended if the watch is replaced, cancelled or extended.Note: Click for Watch Status Reports.
SEL3
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 513
NWS Storm Prediction Center Norman OK
335 PM CDT Sat Jul 25 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and Eastern South Dakota
* Effective this Saturday afternoon and evening from 335 PM until
1100 PM CDT.
…THIS IS A PARTICULARLY DANGEROUS SITUATION…
* Primary threats include…
Widespread damaging winds and scattered significant gusts to 100
mph likely
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY…Thunderstorms are forecast to intensify this afternoon and
become severe with an initial threat for isolated large hail and
severe gusts. As additional storms form and cold pools coalesce, a
linear cluster of severe thunderstorms is expected to organize in
central and eastern South Dakota by the early evening. A
severe-wind squall line with widespread severe gusts is forecast and
peak gusts 85 to 100 mph are likely.
The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 20 miles west northwest
of Philip SD to 20 miles 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.
&&
AVIATION…A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 85 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
28040.
…Smith
SEL3
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 513
NWS Storm Prediction Center Norman OK
335 PM CDT Sat Jul 25 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Central and Eastern South Dakota
* Effective this Saturday afternoon and evening from 335 PM until
1100 PM CDT.
…THIS IS A PARTICULARLY DANGEROUS SITUATION…
* Primary threats include…
Widespread damaging winds and scattered significant gusts to 100
mph likely
Isolated large hail events to 1.5 inches in diameter possible
SUMMARY…Thunderstorms are forecast to intensify this afternoon and
become severe with an initial threat for isolated large hail and
severe gusts. As additional storms form and cold pools coalesce, a
linear cluster of severe thunderstorms is expected to organize in
central and eastern South Dakota by the early evening. A
severe-wind squall line with widespread severe gusts is forecast and
peak gusts 85 to 100 mph are likely.
The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 20 miles west northwest
of Philip SD to 20 miles 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.
&&
AVIATION…A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 85 knots. A
few cumulonimbi with maximum tops to 600. Mean storm motion vector
28040.
…Smith
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW3
WW 513 SEVERE TSTM SD 252035Z – 260400Z
AXIS..75 STATUTE MILES NORTH AND SOUTH OF LINE..
20WNW PHP/PHILIP SD/ – 20SE BKX/BROOKINGS SD/
..AVIATION COORDS.. 65NM N/S /46ENE RAP – 29NNE FSD/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..85 KNOTS.
MAX TOPS TO 600. MEAN STORM MOTION VECTOR 28040.
LAT…LON 45250197 45189654 43019654 43070197
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU3.
Watch 513 Status Report Message has not been issued yet.
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 (10%)
Wind
Probability of 10 or more severe wind events
High (80%)
Probability of 1 or more wind events > 65 knots
High (80%)
Hail
Probability of 10 or more severe hail events
Mod (30%)
Probability of 1 or more hailstones > 2 inches
Low (20%)
Combined Severe Hail/Wind
Probability of 6 or more combined severe hail/wind events
High (>95%)
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.