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.
SEL0
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 140
NWS Storm Prediction Center Norman OK
345 PM CDT Thu Apr 17 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Northwest and Northern Iowa
Southern and Southeast Minnesota
Far Northeast Nebraska
West-Central Wisconsin
* Effective this Thursday afternoon and evening from 345 PM until
1000 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…Scattered thunderstorms are forecast to develop and
intensify through the early evening across the Watch area. The
stronger storms will be capable of a threat for large to very large
hail (1 to 2 inches in diameter) and damaging gusts. Upscale growth
into a linear cluster is possible this evening across southern
Minnesota as this activity moves east towards the Mississippi River.
The severe thunderstorm watch area is approximately along and 65
statute miles east and west of a line from 25 miles northeast of
Minneapolis MN to 30 miles south southwest of Storm Lake IA. 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.
&&
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 450. Mean storm motion vector
25030.
…Smith
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW0
WW 140 SEVERE TSTM IA MN NE WI 172045Z – 180300Z
AXIS..65 STATUTE MILES EAST AND WEST OF LINE..
25NE MSP/MINNEAPOLIS MN/ – 30SSW SLB/STORM LAKE IA/
..AVIATION COORDS.. 55NM E/W /22NE MSP – 57WSW FOD/
HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25030.
LAT…LON 45139152 42199418 42199672 45139419
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU0.
Watch 140 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 ( 65 knots
Low (20%)
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.