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.
SEL8
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 118
NWS Storm Prediction Center Norman OK
510 PM CDT Fri Apr 4 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
South Central Illinois
Southern Missouri
* Effective this Friday afternoon from 510 PM until Midnight CDT.
* Primary threats include…
Scattered damaging wind gusts to 60 mph likely
Scattered large hail events to 1.5 inches in diameter likely
A tornado or two possible
SUMMARY…Clusters of thunderstorms will overspread the watch area
through the evening, posing a risk of large hail and perhaps locally
damaging wind gusts.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 30 miles south of
Springfield MO to 50 miles east of Mount Vernon IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
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 113…WW 114…WW
115…WW 116…WW 117…
AVIATION…A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 50 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
24035.
…Hart
SEL8
URGENT – IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 118
NWS Storm Prediction Center Norman OK
510 PM CDT Fri Apr 4 2025
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
South Central Illinois
Southern Missouri
* Effective this Friday afternoon from 510 PM until Midnight CDT.
* Primary threats include…
Scattered damaging wind gusts to 60 mph likely
Scattered large hail events to 1.5 inches in diameter likely
A tornado or two possible
SUMMARY…Clusters of thunderstorms will overspread the watch area
through the evening, posing a risk of large hail and perhaps locally
damaging wind gusts.
The severe thunderstorm watch area is approximately along and 40
statute miles north and south of a line from 30 miles south of
Springfield MO to 50 miles east of Mount Vernon IL. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU8).
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 113…WW 114…WW
115…WW 116…WW 117…
AVIATION…A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 50 knots. A
few cumulonimbi with maximum tops to 450. Mean storm motion vector
24035.
…Hart
Note: The Aviation Watch (SAW) product is an approximation to the watch area. The actual watch is depicted by the shaded areas.
SAW8
WW 118 SEVERE TSTM IL MO 042210Z – 050500Z
AXIS..40 STATUTE MILES NORTH AND SOUTH OF LINE..
30S SGF/SPRINGFIELD MO/ – 50E MVN/MOUNT VERNON IL/
..AVIATION COORDS.. 35NM N/S /35S SGF – 25NNW PXV/
HAIL SURFACE AND ALOFT..1.5 INCHES. WIND GUSTS..50 KNOTS.
MAX TOPS TO 450. MEAN STORM MOTION VECTOR 24035.
LAT…LON 37369338 38908795 37748795 36219338
THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A
COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
FOR WOU8.
Watch 118 Status Report Message has not been issued yet.
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 (10%)
Wind
Probability of 10 or more severe wind events
Mod (60%)
Probability of 1 or more wind events > 65 knots
Low (20%)
Hail
Probability of 10 or more severe hail events
Mod (60%)
Probability of 1 or more hailstones > 2 inches
Low (10%)
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.