sleepynerd@narcolepticnerd
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cat $HOME/public_html/posts/storm-prediction-center-severe-thunderstorm-watch-410.txt | parse_content --format=auto
Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended.
Note: Click for Watch Status Reports.
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 410
NWS Storm Prediction Center Norman OK
1125 PM CDT Sat Jun 27 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
North-Central Nebraska
South-Central and Southeast South Dakota
* Effective this Saturday night and Sunday morning from 1125 PM
until 700 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 80
mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...An evolving bow echo is forecast to continue
east-northeastward across north-central Nebraska and south-central
South Dakota into southeast South Dakota tonight. Strong to severe
gusts are possible with this bow, with a low-probability risk for a
brief line-embedded tornado as well. Additionally, more cellular
activity is possible in the wake of this bow, resulting in a
lingering severe threat across north-central Nebraska and
south-central South Dakota. Primary risk with this more cellular
activity is large to isolated very large hail.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 30 miles north
northwest of Ainsworth NE to 5 miles northeast of Sioux Falls SD.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU0).
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 406...WW 409...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27035.
...Mosier
SEL0
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 410
NWS Storm Prediction Center Norman OK
1125 PM CDT Sat Jun 27 2026
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
North-Central Nebraska
South-Central and Southeast South Dakota
* Effective this Saturday night and Sunday morning from 1125 PM
until 700 AM CDT.
* Primary threats include...
Scattered damaging winds and isolated significant gusts to 80
mph possible
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
A tornado or two possible
SUMMARY...An evolving bow echo is forecast to continue
east-northeastward across north-central Nebraska and south-central
South Dakota into southeast South Dakota tonight. Strong to severe
gusts are possible with this bow, with a low-probability risk for a
brief line-embedded tornado as well. Additionally, more cellular
activity is possible in the wake of this bow, resulting in a
lingering severe threat across north-central Nebraska and
south-central South Dakota. Primary risk with this more cellular
activity is large to isolated very large hail.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 30 miles north
northwest of Ainsworth NE to 5 miles northeast of Sioux Falls SD.
For a complete depiction of the watch see the associated watch
outline update (WOUS64 KWNS WOU0).
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 406...WW 409...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 70 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27035.
...Mosier
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW0 WW 410 SEVERE TSTM NE SD 280425Z - 281200Z AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE.. 30NNW ANW/AINSWORTH NE/ - 5NE FSD/SIOUX FALLS SD/ ..AVIATION COORDS.. 35NM N/S /26NNW ANW - 5ESE FSD/ HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..70 KNOTS. MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27035. LAT...LON 43560021 44219666 43059666 42400021 THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS FOR WOU0.
Watch 410 Status Report Messages:
STATUS REPORT #1 ON WW 410 VALID 280640Z - 280740Z SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNE VTN TO 25 SSW 9V9 TO 25 SE 9V9 TO 30 WNW MHE TO 10 NW HON. ..JEWELL..06/28/26 ATTN...WFO...LBF...FSD...ABR... && STATUS REPORT FOR WS 410 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS NEC015-031-103-280740- NE . NEBRASKA COUNTIES INCLUDED ARE BOYD CHERRY KEYA PAHA $$ SDC003-009-023-027-035-043-053-061-067-073-079-083-087-097-099- 101-111-125-127-135-280740- SD . SOUTH DAKOTA COUNTIES INCLUDED ARE AURORA BON HOMME CHARLES MIX CLAY DAVISON DOUGLAS GREGORY HANSON HUTCHINSON JERAULD LAKE LINCOLN MCCOOK MINER MINNEHAHA MOODY SANBORN TURNER UNION YANKTON $$ 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 (20%) |
| Probability of 1 or more strong (EF2-EF5) tornadoes |
Low ( |
Wind
| Probability of 10 or more severe wind events |
Mod (50%) |
| Probability of 1 or more wind events > 65 knots |
Mod (30%) |
Hail
| Probability of 10 or more severe hail events |
Mod (40%) |
| 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 (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.
sleepynerd@narcolepticnerd
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