Note:
The expiration time in the watch graphic is amended if the watch is
replaced, cancelled or extended. Note: Click for Watch Status Reports.
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 141
NWS Storm Prediction Center Norman OK
445 PM CDT Thu Apr 17 2025
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Western Iowa
Eastern Nebraska
* Effective this Thursday afternoon from 445 PM until Midnight
CDT.
* Primary threats include...
A couple tornadoes possible
Scattered large hail likely with isolated very large hail events
to 3 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Severe storms are expected to increase from west to east
near a boundary that extends across the region. Large hail will be
the most common risk, but damaging winds are also expected, and a
risk for tornadoes will increase through early evening.
The tornado watch area is approximately along and 60 statute miles
north and south of a line from 55 miles southeast of Denison IA to
60 miles southwest of Columbus NE. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU1).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 140...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 24025.
...Guyer
SEL1
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 141
NWS Storm Prediction Center Norman OK
445 PM CDT Thu Apr 17 2025
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Western Iowa
Eastern Nebraska
* Effective this Thursday afternoon from 445 PM until Midnight
CDT.
* Primary threats include...
A couple tornadoes possible
Scattered large hail likely with isolated very large hail events
to 3 inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Severe storms are expected to increase from west to east
near a boundary that extends across the region. Large hail will be
the most common risk, but damaging winds are also expected, and a
risk for tornadoes will increase through early evening.
The tornado watch area is approximately along and 60 statute miles
north and south of a line from 55 miles southeast of Denison IA to
60 miles southwest of Columbus NE. For a complete depiction of the
watch see the associated watch outline update (WOUS64 KWNS WOU1).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and 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.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 140...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 24025.
...Guyer
Note:
The Aviation Watch (SAW) product is an approximation to the watch area.
The actual watch is depicted by the shaded areas.
SAW1
WW 141 TORNADO IA NE 172145Z - 180500Z
AXIS..60 STATUTE MILES NORTH AND SOUTH OF LINE..
55SE DNS/DENISON IA/ - 60SW OLU/COLUMBUS NE/
..AVIATION COORDS.. 50NM N/S /44W DSM - 34SSE OBH/
HAIL SURFACE AND ALOFT..3 INCHES. WIND GUSTS..60 KNOTS.
MAX TOPS TO 550. MEAN STORM MOTION VECTOR 24025.
LAT...LON 40559463 39969816 41709816 42289463
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU1.
Watch 141 Status Report Message has not been issued yet.
Probability of 1 or more strong (EF2-EF5) tornadoes
Low (20%)
Wind
Probability of 10 or more severe wind events
Mod (50%)
Probability of 1 or more wind events > 65 knots
Low (20%)
Hail
Probability of 10 or more severe hail events
High (70%)
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 (>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.
